WO2000039149A2 - Secreted proteins and uses thereof - Google Patents
Secreted proteins and uses thereof Download PDFInfo
- Publication number
- WO2000039149A2 WO2000039149A2 PCT/US1999/031157 US9931157W WO0039149A2 WO 2000039149 A2 WO2000039149 A2 WO 2000039149A2 US 9931157 W US9931157 W US 9931157W WO 0039149 A2 WO0039149 A2 WO 0039149A2
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- WIPO (PCT)
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- polypeptide
- nucleic acid
- seq
- amino acid
- protein
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
- C07K14/715—Receptors; Cell surface antigens; Cell surface determinants for cytokines; for lymphokines; for interferons
- C07K14/7151—Receptors; Cell surface antigens; Cell surface determinants for cytokines; for lymphokines; for interferons for tumor necrosis factor [TNF], for lymphotoxin [LT]
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K2217/00—Genetically modified animals
- A01K2217/05—Animals comprising random inserted nucleic acids (transgenic)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
Definitions
- secreted proteins for example, cytokines and cytokine receptors
- cytokines and cytokine receptors play a vital role in the regulation of cell growth, cell differentiation, and a variety of specific cellular responses.
- a number of medically useful proteins including erythropoietin, granulocyte- macrophage colony stimulating factor, human growth hormone, and various interleukins, are secreted proteins.
- erythropoietin granulocyte- macrophage colony stimulating factor
- human growth hormone and various interleukins
- the identification and characterization of such a receptor enables one to identify both the ligands which bind to the receptor and the intracellular molecules and signal transduction pathways associated with the receptor, permitting one to identify or design modulators of receptor activity, e.g., receptor agonists or antagonists and modulators of signal transduction.
- the present invention is based, at least in part, on the discovery of cDNA molecules which encode the TANGO 214 and 219 proteins, both of which are secreted proteins.
- the TANGO 214 proteins share significant homology to the human HtrA protein, the human homologue of the E. coli HtrA (high temperature requirement) gene product, a critical component of the bacterial response to stress. Because of their homology to the human HtrA protein, TANGO 214 proteins (and the nucleic acids that encode them) are referred to herein as HtrA-2 proteins (and nucleic acid molecules).
- HtrA-2 and TANGO 219 proteins, fragments, derivatives, and variants thereof are collectively referred to as "polypeptides of the invention” or “proteins of the invention.”
- Nucleic acid molecules encoding the polypeptides or proteins of the invention are collectively referred to as “nucleic acids of the invention.”
- nucleic acids and polypeptides of the present invention are useful as modulating agents in regulating a variety of cellular processes. Accordingly, in one aspect, this invention provides isolated nucleic acid molecules encoding a polypeptide of the invention or a biologically active portion thereof. The present invention also provides nucleic acid molecules which are suitable for use as primers or hybridization probes for the detection of nucleic acids encoding a polypeptide of the invention.
- the invention features nucleic acid molecules which are at least 45% (or 55%, 65%,
- nucleic acid molecules encode polypeptides or proteins that exhibit at least one structural and/or functional feature
- the invention features nucleic acid molecules of at least 510, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500, 1550, 1600, 1650, 1700, 1750, 1800, 1850, 1900, 1950, 2000, 2050, 2100, 2150, 2200, 2250, 2300, 2350, 2400, 2450, 2500, 2550, or 2570 nucleotides of the nucleotide
- the invention also features nucleic acid molecules comprising at least 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600, 625, 650, 675, 700, 725, 750, 775, 800, 825, 850, 875, 900, or 910
- the invention features nucleic acid molecules which include a fragment of at least 25, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150, 1200, 1250, 1300, or 1350 nucleotides of the nucleotide sequence of SEQ JD NO:2, or a complement thereof.
- the invention features nucleic acid molecules of at least 380, 400, 450, 500, 550,
- nucleic acid molecules comprising at least 25, 50, 75, 100, 125, 150,
- nucleic acids 1 to 285 of SEQ ID NO: 18, or a complement thereof are examples of nucleic acids 1 to 285 of SEQ ID NO: 18, or a complement thereof.
- the invention features nucleic acid molecules which include a fragment of at least 380, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1025, or 1035 nucleotides of the nucleotide sequence of SEQ JD NO: 19, or a complement thereof.
- the invention features nucleic acid molecules of at least 280, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150, 1200, or 1240 nucleotides of the nucleotide sequence of SEQ LD NO:13, the nucleotide sequence of a human TANGO 219 cDNA, the nucleotide sequence of the human TANGO 219 cDNA clone of ATCC Accession No. 98899, or a complement thereof.
- the invention also features nucleic acid molecules comprising at least 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 nucleotides of nucleic acids 1 to 2227 of SEQ LD NO:13, or a complement thereof.
- the invention features nucleic acid molecules which include a fragment of at least 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, or 440 nucleotides of the nucleotide sequence of SEQ ID NO: 14, or a complement thereof.
- the invention features nucleic acid molecules of at least 300, 305, 310, 315, 320, 325, 330, 335, 340, 345, 350, 355, 360, 365, 370, 375, 380, 385, or 390 nucleotides of the nucleotide sequence of SEQ LD NO:21, the nucleotide sequence of a mouse TANGO 219 cDNA, or a complement thereof.
- the invention features nucleic acid molecules which include a fragment of at least or
- the invention features nucleic acid molecules which include a fragment of at least 300 (325, 350, 375, 400, 425, 450, 500, 550, 600, 650, 700, 800, 900, 1000, or 1200) nucleotides of the nucleotide sequence of SEQ ID NO:l, 2, 13, 14, 18, 19, 21, or 22, the nucleotide sequence of a human HtrA-2 cDNA, the nucleotide sequence of a human TANGO 219 cDNA, the nucleotide sequence of the human HtrA-2 cDNA of ATCC Accession Number 98899, the nucleotide sequence of the human TANGO 219 cDNA of ATCC Accession Number 98899, or a complement thereof.
- the invention features nucleic acid molecules which include a fragment of at least 300 (325, 350, 375, 400, 425, 450, 500, 550, 600, 650, 700, 800, 900, 1000, or 1200) nucleotides of the nucle
- nucleotide sequence of SEQ ID NO: 13 the nucleotide sequence of a human TANGO 219 cDNA, the nucleotide sequence of the human HtrA-2 cDNA of ATCC Accession Number 98899, the nucleotide sequence of the human TANGO 219 cDNA of ATCC Accession Number 98899, or a complement thereof.
- the invention also features nucleic acid molecules which include a nucleotide sequence encoding a protein having an amino acid sequence that is at least 45% (or 55%, 65%, 75%, 85%, 95%, or 98%) identical to the amino acid sequence of SEQ ID NO:3, 15, 20, or 23, the amino acid sequence encoded by the human HtrA-2 cDNA of ATCC Accession Number 988899, the amino acid sequence encoded by the human TANGO 219 cDNA of ATCC Accession Number 988899, or a complement thereof, wherein the protein encoded by the nucleotide sequence also exhibits at least one structural and/or functional feature of a polypeptide of the invention.
- the nucleic acid molecules have the nucleotide sequence
- nucleic acid molecules which encode a fragment of a polypeptide having the amino acid sequence of SEQ ID NO:3, 15, 20, 23 or a fragment
- nucleic acid molecules which encode a fragment of a polypeptide having the amino acid sequence of SEQ LD NO:3, 15, 20, 23, or a fragment including at least 15 (25, 30, 50, 70, 90, 100, 120, 140) contiguous amino acids of SEQ ID NO:3, 15, 20, 23, the amino acid sequence encoded by the human HtrA-2 cDNA of ATCC Accession Number 988899, or the amino acid sequence encoded by the human TANGO
- the invention includes nucleic acid molecules which encode a naturally occurring allelic variant of a polypeptide comprising the amino acid sequence of SEQ ID NO:3, 15, 20, 23, the amino acid sequence encoded by the human HtrA-2 cDNA of ATCC Accession
- nucleic acid molecule hybridizes to a nucleic acid molecule consisting of a nucleic acid sequence encoding SEQ ID NO:3, 15, 20, 23, the amino acid sequence encoded by the human HtrA-2 cDNA of ATCC Accession Number 988899, or the amino acid sequence encoded by the human TANGO 219 cDNA of
- nucleic acid molecules encode polypeptides or proteins that exhibit at least one structural and/or functional feature of a polypeptide of the invention.
- isolated polypeptides or proteins having an amino acid sequence that is at least about 60%, preferably 65%, 75%, 85%, 95%, or 98% identical to
- polypeptides or proteins also exhibit at least one structural and/or functional feature of a polypeptide of the invention
- isolated polypeptides or proteins which preferably are encoded by a nucleic acid molecule having a nucleotide sequence that is at least about 60%, preferably 65%, 75%, 85%, or 95% identical the nucleic acid sequence encoding SEQ ID NO:3, 15, 20, or 23, and isolated polypeptides or proteins which are encoded by a nucleic acid molecule having a nucleotide sequence which hybridizes under stringent hybridization
- nucleic acid molecule having the nucleotide sequence of SEQ ID NO: 1 , 2, 13, 14, 18, 19, 21, 22, a complement thereof, the non-coding strand of the nucleotide sequence of the human HtrA-2 cDNA of ATCC Accession Number 98899, the non-coding strand of the nucleotide sequence of the human TANGO 219 cDNA of ATCC Accession Number 98899, wherein such nucleic acid molecules encode polypeptides or proteins that
- 15 preferably also exhibit at least one structural and/or functional feature of a polypeptide of the invention.
- polypeptides which are naturally occurring allelic variants of a polypeptide that includes the amino acid sequence of SEQ ID NO:3, 15, 20, 23, the amino acid sequence encoded by the human HtrA-2 cDNA of ATCC Accession
- nucleic acid molecules which hybridizes to a nucleic acid molecule having the sequence of SEQ ID NO:l, 2, 13, 14, 18, 19, 21, 22 or a complement thereof under stringent conditions, wherein such nucleic acid molecules encode polypeptides or proteins that exhibit at least one
- the invention also features nucleic acid molecules that hybridize under stringent conditions to a nucleic acid molecule having the nucleotide sequence of SEQ LD NO:l, 2, 13, 14, 18, 19, 21, 22, the cDNA of human HtrA-2 cDNA of ATCC Accession Number 988899, the cDNA of human TANGO 219 cDNA of ATCC Accession Number 988899, or
- the nucleic acid molecules are at least 300 (325, 350, 375, 400, 425, 450, 500, 550, 600, 650, 700, 800, 900, 1000, or 1200) nucleotides in length and hybridize under stringent conditions to a nucleic acid molecule comprising the nucleotide sequence of SEQ ID NO:l, 2, 13, 14, 18, 19, 21, 22, the cDNA of human HtrA-2 cDNA of ATCC Accession Number 988899, the cDNA of human TANGO
- nucleic acid molecules encode polypeptides or proteins that exhibit at least one structural and/or functional feature of a polypeptide of the invention.
- the invention also features nucleic acid molecules that hybridize under stringent conditions to a nucleic acid molecule comprising the nucleotide sequence of SEQ ID NO:l,
- nucleic acid molecules encode polypeptides or proteins that exhibit at least one structural and/or functional feature of a polypeptide of the invention.
- the nucleic acid molecules are at least 50 (60, 80, 100,
- nucleic acid molecule comprising the nucleotide sequence of SEQ ID NO:l, 2, 13, 14, 18, 19, 21, 22, the cDNA of human HtrA-2 cDNA of ATCC Accession Number 988899, the cDNA of human TANGO 219 cDNA of ATCC Accession Number 988899, or a complement thereof, wherein such nucleic acid
- 15 molecules encode polypeptides or proteins that exhibit at least one structural and/or functional feature of a polypeptide of the invention.
- the invention provides an isolated nucleic acid molecule which is antisense to the coding strand of a nucleic acid of the invention.
- Another aspect of the invention provides vectors, e.g., recombinant expression
- the invention provides host cells containing such a vector or a nucleic acid molecule of the invention.
- the invention also provides methods for producing a polypeptide of the invention by culturing, in a suitable medium, a host cell of the invention containing a recombinant expression vector such that a polypeptide is produced.
- Another aspect of this invention features isolated or recombinant proteins and polypeptides of the invention. Preferred proteins and polypeptides possess at least one biological activity possessed by the corresponding naturally-occurring human polypeptide.
- An activity, a biological activity, or a functional activity of a polypeptide or nucleic acid of the invention refers to an activity exerted by a protein, polypeptide or nucleic acid molecule
- Such activities can be a direct activity, such as an association with or an enzymatic activity on a second protein, or an indirect activity, such as a cellular signaling activity mediated by interaction of the protein with a second protein.
- biological activities include, e.g., (1) the ability to modulate growth
- 35 factor function e.g., that of insulin-like growth factor (IGF), e.g., IGF-I, IGF-LI, , by, for example, modulating the availability of growth factors and/or their receptors; (2) the ability to modulate (e.g., inhibit) the activity of a proteolytic enzyme, e.g., a serine protease; and (3) the ability to modulate the function, migration, proliferation (e.g., suppress cell growth), and/or differentiation of cells, e.g., cells in tissues in which it is expressed (see description of expression data below) and, in particular, bone cells such as osteoblasts and osteoclasts, and cartilage cells such as chondrocytes.
- IGF insulin-like growth factor
- IGF-I insulin-like growth factor-LI
- HtrA-2 activities include: (1) the ability to act as a proteolytic enzyme cleaving either itself (e.g., autocatalysis, e.g., autocatalysis between its own Kazal and serine protease domains) or other substrates; (2) the ability to bind to an inhibitor of proteolytic enzyme activity, e.g., an inhibitor of a serine protease, e.g., ⁇ , -antitrypsin; (3) the ability to modulate the activity of proteins (e.g., TGF-beta family members) in the activin/inhibin growth factor system; and (4) the ability to perform one or more of the functions of human HtrA described, for example, in Hu et al. (1998) J.
- a proteolytic enzyme cleaving either itself (e.g., autocatalysis, e.g., autocatalysis between its own Kazal and serine protease domains) or other substrates
- an inhibitor of proteolytic enzyme activity
- HtrA-2 Other activities of HtrA-2 include: (1) the ability to modulate the function of a normal or mutated presenilin protein (e.g., presenilin-1 (PS-1) or presenilin-2 (PS-2)); and (2) the ability to perform a function of the human serine protease PSP-1, described in EP 828 003, the contents of which are incorporated herein by reference.
- PS-1 presenilin-1
- PS-2 presenilin-2
- PSP-1 human serine protease
- HtrA-2 activities include: (1) the ability to mediate protein-protein interactions; (2) the ability to modulate protein degradation, e.g., degradation of denatured and/or misfolded proteins; (3) the ability to act as a chaperone protein, e.g., to renature misfolded proteins and help to restore their function; (4) the ability to interact with (e.g., bind to) the normal or mutated gene product of a human presenilin gene (e.g., human presenilin 1 (PS-1), e.g., mutant PS-1 TM16TM2 loop domain as described in PCT Number WO98/01549, published January 15, 1998); (5) the ability to interact with (e.g., bind to) a protein expressed in brain; (6) the ability to modulate a neurological function; (7) the ability to interact with (e.g., bind to) a protein containing the following consensus sequence: Xaa- Ser/Thr-Xaa-Nal-COO-,
- a polypeptide of the invention has an amino acid sequence sufficiently identical to an identified domain of a polypeptide of the invention.
- the term "sufficiently identical” refers to a first amino acid or nucleotide sequence which contains a sufficient or minimum number of identical or equivalent (e.g., with a similar side chain) amino acid residues or nucleotides to a second amino acid or nucleotide sequence such that the first and second amino acid or nucleotide sequences have a common structural domain and/or common functional activity.
- an HtrA-2 protein includes at least one of the following domains: a signal sequence, an IGF binding domain, a Kazal serine protease inhibitor domain, a serine protease domain, and a PDZ domain.
- an HtrA-2 protein includes two or more of the following domains: a signal sequence, an IGF binding domain, a Kazal serine protease inhibitor domain, a serine protease domain, and a PDZ domain, and is secreted.
- a TANGO 219 protein includes a signal sequence.
- a nucleic acid molecule of the present invention encodes an HtrA-2 protein which includes at least one of the following domains: a signal sequence, an IGF binding domain, a Kazal serine protease inhibitor domain, a serine protease domain, and a PDZ domain.
- a nucleic acid molecule of the present invention encodes an HtrA-2 protein which includes two or more of the following domains: a signal sequence, an IGF binding domain, a Kazal serine protease inhibitor domain, a serine protease domain, and a PDZ domain.
- nucleic acid molecule of the present invention which encodes an HtrA-2 protein which includes three, four, or all of the following domains: a signal sequence, an IGF binding domain, a Kazal serine protease inhibitor domain, a serine protease domain, and a PDZ domain.
- a nucleic acid molecule of the present invention encodes a TANGO 219 protein which includes a signal sequence.
- polypeptides of the present invention can be operably linked to a heterologous amino acid sequence to form fusion proteins.
- the invention further features antibodies that specifically bind a polypeptide of the invention such as monoclonal or polyclonal antibodies.
- the polypeptides of the invention or biologically active portions thereof can be incorporated into pharmaceutical compositions, which optionally include pharmaceutically acceptable carriers.
- the present invention provides methods for detecting the presence of the activity or expression of a polypeptide of the invention in a biological sample by contacting the biological sample with an agent capable of detecting an indicator of activity such that the presence of activity is detected in the biological sample.
- the invention provides methods for modulating activity of a polypeptide of the invention comprising contacting a cell with an agent that modulates (inhibits or stimulates) the activity or expression of a polypeptide of the invention such that activity or expression in the cell is modulated.
- the agent is an antibody that specifically binds to a polypeptide of the invention.
- the agent modulates expression of a polypeptide of the invention by modulating transcription, splicing, or translation of an mRNA encoding a polypeptide of the invention.
- the agent is a nucleic acid molecule having a nucleotide sequence that is antisense to the coding strand of an mRNA encoding a polypeptide of the invention.
- the present invention also provides methods to treat a subject having a disorder characterized by aberrant activity of a polypeptide of the invention or aberrant expression of a nucleic acid of the invention by administering an agent which is a modulator of the activity of a polypeptide of the invention or a modulator of the expression of a nucleic acid of the invention to the subject.
- the modulator is a protein of the invention.
- the modulator is a nucleic acid of the invention.
- the modulator is a peptide, peptidomimetic, or other small organic molecule.
- the present invention also provides diagnostic assays for identifying the presence or absence of a genetic lesion or mutation characterized by at least one of: (i) aberrant modification or mutation of a gene encoding a polypeptide of the invention, (ii) mis- regulation of a gene encoding a polypeptide of the invention, and (iii) aberrant post- translational modification of the invention wherein a wild-type form of the gene encodes a protein having the activity of the polypeptide of the invention.
- the invention provides a method for identifying a compound that binds to or modulates the activity of a polypeptide of the invention.
- such methods entail measuring a biological activity of the polypeptide in the presence and absence of a test compound and identifying those compounds which alter the activity of the polypeptide.
- the invention also features methods for identifying a compound which modulates the expression of a polypeptide or nucleic acid of the invention by measuring the expression of the polypeptide or nucleic acid in the presence and absence of the compound.
- Figures IA, IB, and 1C depict the cDNA sequence of human HtrA-2 (SEQ LD NO:l) and the predicted amino acid sequence of HtrA-2 (SEQ ID NO:3).
- the open reading frame of SEQ ID NO:l extends from nucleotide 222 to nucleotide 1580 of SEQ ID NO:l (SEQ ID NO:2).
- Figure 2 depicts a hydropathy plot of human HtrA-2. Relatively hydrophobic regions of the protein are above the dashed horizontal line, and relatively hydrophilic regions of the protein are below the dashed horizontal line. The cysteine residues (cys) are indicated by short vertical lines just below the hydropathy trace. Below the hydropathy plot, the amino acid sequence of HtrA-2 is depicted.
- Figures 3A-3G depict an alignment of the nucleotide sequence of human HtrA (SEQ ID NO:3).
- the open reading frame of SEQ ID NO:l extends from nucleotide
- FIG. 10 GenBank Accession Number Y07921) and the nucleotide sequence of human HtrA-2 (SEQ ID NO:l).
- the nucleotide sequences of human HtrA and human HtrA-2 are 50.9% identical. This alignment was performed using the ALIGN alignment program with a PAM120 scoring matrix.
- Figures 4A-4D depict an alignment of the nucleotide sequence of the open reading frames of human HtrA (nucleotides 39 to 1478 of SEQ LD NO:10)(SEQ ID NO:) and human HtrA-2 (SEQ ID NO:2).
- nucleotide sequences of the open reading frames of human HtrA (SEQ LD NO:) and human HtrA-2 (SEQ ID NO:l) are 62.3% identical. This alignment was performed using the ALIGN alignment program with a PAM120 scoring matrix.
- Figures 5A-5B depicts an alignment of the amino acid sequence of human HtrA (SEQ ID NO: 11) and the amino acid sequence of human HtrA-2 (SEQ LD NO:3).
- the amino acid sequences of human HtrA and human HtrA-2 are 56.5% identical. This alignment was performed using the ALIGN alignment program with a PAM120 scoring matrix.
- Figures 6A and 6B depict the cDNA sequence of human TANGO 219 (SEQ ID NO: 12) and the predicted amino acid sequence of TANGO 219 (SEQ LD NO: 14).
- the open reading frame of SEQ ID NO:12 extends from nucleotide 106 to nucleotide 552 of SEQ ID NO:12 (SEQ ID NO:13).
- Figure 7 depicts a hydropathy plot of human TANGO 219. Relatively hydrophobic regions of the protein are shown above the horizontal line, and relatively hydrophilic regions of the protein are below the horizontal line.
- the cysteine residues (cys) and potential N-glycosylation sites (Ngly) are indicated by short vertical lines just below the hydropathy trace. Below the hydropathy plot, the amino acid sequence of TANGO 219 is depicted.
- Figure 8 depicts the cDNA sequence of mouse HtrA-2 (SEQ ID NO: 17) and the predicted amino acid sequence of HtrA-2 (SEQ ID NO: 19).
- the open reading frame of SEQ ID NO: extends from nucleotide 268 to 1311 nucleotide of SEQ ID NO: (SEQ ID NO: 19).
- Figure 9 depicts the cDNA sequence of mouse TANGO 219 (SEQ LD NO:20) and the predicted amino acid sequence of TANGO 219 (SEQ ID NO:22).
- the open reading frame of SEQ ID NO: comprises from nucleotide 2 to 370 nucleotide of SEQ JD NO: (SEQ ID NO:21).
- the HtrA-2 proteins and nucleic acid molecules comprise a family of molecules having certain conserved structural and functional features.
- the TANGO 219 proteins and nucleic acid molecules comprise a family of molecules having conserved functional and structural features.
- the term "family" is intended to mean two or more proteins or nucleic acid molecules having a common structural domain and having sufficient amino acid or nucleotide sequence identity as defined herein. Family members can be from either the same or different species. For example, a family can comprises two or more proteins of human origin, or can comprise one or more proteins of human origin and one or more of non-human origin. Members of the same family may also have common structural domains.
- HtrA-2 proteins and TANGO 219 proteins of the invention have signal sequences.
- a "signal sequence" includes a peptide of at least about 15 or 20 amino acid residues in length which occurs at the N-terminus of secretory and membrane-bound proteins and which contains at least about 70% hydrophobic amino acid residues such as alanine, leucine, isoleucine, phenylalanine, pro line, tyrosine, tryptophan, or valine.
- a signal sequence contains at least about 15 to 25 amino acid residues, preferably about 18-22 amino acid residues, and has at least about 60-80%, more preferably 65-75%, and more preferably at least about 70% hydrophobic residues.
- an HtrA- 2 protein contains a signal sequence of about amino acids 1 to 17 of SEQ JD NO: 3 (SEQ ID NO:5).
- a TANGO 219 protein contains a signal sequence of about amino acids 1 to 18 of SEQ ID NO:14 (SEQ LD NO:16). The signal sequence is normally cleaved during processing of the mature protein.
- HtrA-2 family members can also include an IGF-binding domain.
- IGF-binding domain refers to a cysteine rich protein domain that includes about 40-80 amino acid residues, preferably about 50-70 amino acid residues, more preferably about 55-65 amino acid residues, and most preferably about 61 amino acid residues.
- an IGF-binding domain is found at the N-terminal half of HtrA-2 and includes a cluster of about 6-15 cysteine residues conserved in IGF binding protein family members, more preferably about 8-10 cysteine residues, and still more preferably about 11 cysteine residues.
- an IGF-binding domain includes at least the following consensus sequence: C-Xaa-C-C-Xaa(nl)-C-Xaa-Xaa(n2)-C, wherein C is a cysteine residue, Xaa is any amino acid, nl is about 1-5 amino acid residues, more preferably about 1-3 amino acid residues, and more preferably 2 amino acid residues in length, and n2 is about 2-10 amino acid residues, more preferably 5-10 amino acid residues, and more preferably 6 amino acid residues in length.
- an IGF-binding domain includes at least the following consensus sequence: C-Xaa-C-C-Xaa(nl)-C-A-Xaa(n2)-C, wherein C is a cysteine residue, Xaa is any amino acid, nl is about 1-5 amino acid residues, more preferably about 1-3 amino acid residues, and more preferably 2 amino acid residues in length, and n2 is about 2-10 amino acid residues, more preferably 5-10 amino acid residues, and more preferably 6 amino acid residues in length.
- an HtrA-2 family member includes an IGF-binding domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 18 to 78 of SEQ LD NO:3, which is the IGF-binding domain of HtrA-2 (this IGF-binding domain is also represented as SEQ JD NO:6).
- an HtrA-2 family member includes an IGF-binding domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 18 to 78 of SEQ JD NO:3 (SEQ ID NO:6), includes a conserved cluster of 11 cysteine residues, and an IGF-binding domain consensus sequence as described herein.
- an HtrA-2 family member includes an IGF-binding domain having an amino acid sequence that is at least 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 18 to 78 of SEQ JD NO:3 (SEQ ID NO:6), includes a conserved cluster of 11 cysteine residues, an IGF-binding domain consensus sequence as described herein, and has at least one HtrA-2 biological activity as described herein.
- an HtrA-2 family member has the amino acid sequence of SEQ LD NO:3 wherein the cluster of conserved cysteine residues is located within amino acid residues 25 to 76 (at positions, 25, 29, 34, 39, 48, 50, 51, 54, 62, 70, and 76), and the IGF-binding domain consensus sequence is located at amino acid residues 48 to 62.
- An HtrA-2 family member can also include a Kazal protease inhibitor domain.
- Kazal protease inhibitor domain refers to a protein domain that includes about 30-70 amino acid residues, preferably about 40-60 amino acid residues, more preferably about 45-55 amino acid residues, and most preferably about 48 amino acid residues.
- a Kazal protease inhibitor domain includes a conserved tyrosine residue and a conserved cluster of about 3-7 cysteine residues, preferably about 4-6 cysteine residues, and still more preferably about 5 cysteine residues.
- a Kazal serine protease inhibitor domain includes at least the following consensus sequence: C-Xaa(nl)-C- Xaa(n2)-Y-Xaa(3)-C, wherein C is a cysteine residue, Xaa is any amino acid, nl is about 4- 10 amino acid residues in length, more preferably about 5-8 amino acid residues, and most preferably about 6 amino acid residues in length, n2 is about 4-10 amino acid residues, more preferably about 5-8 amino acid residues, and most preferably about 6 amino acid residues in length, Y is a tyrosine residue, and 3 represents a length of 3 amino acid residues of the type preceding it (in this case 3 of any amino acid (Xaa)).
- an HtrA-2 family member includes a Kazal protease inhibitor domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 79 to 126 of SEQ ID NO:3 (SEQ ID NO:7).
- an HtrA-2 family member includes a Kazal protease inhibitor domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 79 to 126 of SEQ LD NO:3 (SEQ LD NO:7), includes a cluster of 5 cysteine residues, and a Kazal protease inhibitor domain consensus sequence as described herein.
- an HtrA-2 family member includes a Kazal protease inhibitor domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 79 to 126 of SEQ LD NO: 3 (SEQ ID NO: 7), includes a cluster of 5 cysteine residues, and a Kazal protease inhibitor domain consensus sequence as described herein, and has at least one HtrA-2 biological activity as described herein.
- an HtrA-2 family member has the amino acid sequence of SEQ ID NO: 3 wherein the cluster of 5 cysteine residues is located within amino acid residues 81 to 126 (at positions 81, 83, 90, 101, and 126) and the Kazal protease inhibitor domain consensus sequence is located from amino acid residues 83 to amino acid residue 101.
- An HtrA-2 family member can also include a serine protease domain.
- serine protease domain refers to a protein domain that includes about 180-240 amino acid residues, preferably about 190-230 amino acid residues, more preferably about 205-215 amino acid residues, and most preferably about 208 amino acid residues.
- a serine protease domain includes a conserved serine residue, a conserved histidine residue, and a conserved aspartic acid residue in its active site.
- the conserved histidine, aspartic acid, and serine residues typically appear in the active site within three motifs: 1) a conserved histidine active site motif as follows: Thr- Asn-Xaa-Hi s- Val, where Xaa represents Ala or Asn; 2) a conserved aspartic acid active site motif as follows: Asp-He- Ala-Xaa-Ile.
- Xaa represents Leu or Thr; and 3) a conserved serine active site motif as follows: Gly-Asn-Ser-Gly-Gly-Xaa-Leu, where Xaa represents Pro or Ala.
- the conserved histidine active site motif is typically N-terminal to the conserved aspartic acid active site motif, which is N-terminal to the conserved serine active site motif.
- the histidine and aspartic acid motifs are typically separated from (noninclusive of the last amino acid residue of the first motif and the first residue of the subsequent motif) one another by at least about 15 to 55 amino acid residues, more preferably about 25 to 45 amino acid residues, still more preferably about 30 to 40 amino acid residues, and most preferably about 34 amino acid residues.
- the aspartic acid and serine motifs are typically separated from (noninclusive of the last amino acid residue of the first motif and the first residue of the subsequent motif) one another by at least about 50 to 90 amino acid residues, more preferably 60 to 80 amino acid residues, still more preferably about 65 to 78 amino acid residues, and most preferably about 71 amino acid residues.
- an HtrA-2 family member includes a serine protease domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 140 to 347 of SEQ ID NO:l, which is the serine protease domain of HtrA-2 (SEQ ED NO: 8).
- an HtrA-2 family member includes a serine protease domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 140 to 347 of SEQ JD NO:3 (SEQ ED NO:8) and includes a conserved histidine active site motif, a conserved aspartic acid active site motif, and a conserved serine active site motif as described herein.
- an HtrA-2 family member includes a serine protease domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 140 to 347 of SEQ ED NO: 3 (SEQ ED NO: 8), includes a conserved histidine active site motif, a conserved aspartic acid active site motif, and a conserved serine active site motif as described herein, and has at least one HtrA-2 biological activity as described herein.
- an HtrA-2 family member has the amino acid sequence of SEQ ED NO: 3 wherein the conserved histidine active site motif is located at amino acid residues 188 to 192 (the histidine residue is at position 191), the conserved aspartic acid active site motif is located at amino acid residues 227 to 231 (the aspartic acid residue is at position 227), and the conserved serine active site motif is located at amino acid residues 303 to 309 (the serine residue is at position 305).
- an HtrA-2 family member can also include a PDZ domain.
- PDZ domain refers to a protein domain that includes about 70-110 amino acid residues, preferably about 80-100 amino acid residues, more preferably about 87-97 amino acid residues, and most preferably about 92 amino acid residues.
- a PDZ domain is located at the C-terminal half of the HtrA-2 protein and includes at least about 3-7 conserved glycine residues, more preferably about 4-6 conserved glycine residues, and most preferably about 5 conserved glycine residues.
- a PDZ domain also includes at least the following consensus sequence of G-G-Xaa(n)-D-Xaa(n)-N-G, wherein G is glycine, Xaa is any amino acid, n is about 4-10 amino acid residues in length, more preferably about 5-8 amino acid residues in length, and more preferably about 5-6 amino acid residues in length, and D is aspartic acid.
- an HtrA-2 family member includes a PDZ domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 348 to 439 of SEQ ED NO:3 (SEQ LD NO:9).
- an HtrA-2 family member includes PDZ domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%), yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 348 to 439 of SEQ ED NO:3 (SEQ ED NO:9) and is located at the C-terminal half of the protein and has a PDZ domain consensus sequence as described herein.
- an HtrA-2 family member includes a PDZ domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 348 to 439 of SEQ ED NO:3 (SEQ ED NO:9), is located at the C-terminal half of the protein, includes about 5 conserved glycine residues, and has a PDZ domain consensus sequence as described herein.
- an HtrA-2 family member includes a PDZ domain having an amino acid sequence that is at least about 55%, preferably at least about 65%, more preferably at least about 75%, yet more preferably at least about 85%, and most preferably at least about 95% identical to amino acids 348 to 439 of SEQ ED NO:3 (SEQ ED NO:9), is located at the C-terminal half of the protein, includes about 5 conserved glycine residues, has a PDZ domain consensus sequence as described herein, and has at least one HtrA-2 biological activity as described herein.
- an HtrA-2 family member has the amino acid sequence of SEQ JD NO:3 wherein the PDZ domain is located at the C-terminal half of the protein, from amino acid residues 348 to 439, the PDZ domain consensus sequence is located from amino acid residues 400 to amino acid residue 413, and the conserved glycine residues are located within amino acid residues 358-413 (at positions 358, 385, 400, 401, and 413).
- the signal sequence and the IGF-binding domain of the HtrA-2 family member are adjacent (i.e., there are no intervening residues between the last residue of the signal sequence and the first residue of the IGF-binding domain) to one another.
- the IGF-binding domain and Kazal protease inhibitor domain are adjacent (i.e., there are no intervening residues between the last residue of the IGF- binding domain and the first residue of the Kazal protease inhibitor domain) to one another, and the IGF-binding domain is N-terminal to the Kazal protease inhibitor domain.
- the signal sequence is adjacent and N-terminal to the IGF-binding domain, and the Kazal protease inhibitor domain is adjacent to and C-terminal to the IGF-binding domain.
- a cDNA encoding human HtrA-2 was identified by analyzing the sequences of clones present in an LPS-stimulated osteoblast cDNA library and a prostate stroma cDNA library. This analysis led to the identification of a clone, jthqc058bl2, encoding full-length human HtrA-2.
- the human HtrA-2 cDNA of this clone is 2577 nucleotides long ( Figures 1A-1C; SEQ JD NO:l).
- the nucleotide at position 278 is an guanine (G) (SEQ JD NO: 1).
- the amino acid at position 19 is glutamate (E)(SEQ ED NO:3)
- the nucleotide at position 278 is a cytosine (C)(SEQ ED NO:24).
- the amino acid at position 19 is aspartate (D)(SEQ ED NO:25)
- the nucleotide at position 395 is guanine (G)(SEQ JD NO:l).
- the amino acid at position 58 is glutamate (E)(SEQ ED NO:3).
- the nucleotide at position 395 is cytosine (C)(SEQ JD NO:26).
- the amino acid at position 58 is aspartate (D)(SEQ ED NO:27).
- the nucleotide at position 401 is guanine (G)(SEQ JD NO:l).
- the amino acid at position 60 is glutamate (E)(SEQ ED NO:3).
- the nucleotide at position 401 is cytosine (C)(SEQ LD NO:28).
- the amino acid at position 60 is aspartate (D)(SEQ JD NO:29).
- HtrA-2 includes a 17 amino acid signal peptide (amino acid 1 to about amino acid 17 of SEQ JD NO:3)(SEQ ED NO: 5) preceding the mature HtrA-2 protein (corresponding to about amino acid 18 to amino acid 453 of SEQ JD NO:3)(SEQ ED NO:4).
- the HtrA-2 protein molecular weight is 48.6 kDa prior to the cleavage of the signal peptide, 47.0 kDa after cleavage of the signal peptide.
- HtrA-2 includes a IGF binding domain (about amino acids 18 to 78 of SEQ JD
- FIG. 3 shows an alignment of the human HtrA-2 full length nucleic acid sequence (SEQ ED NO:l) with the human HtrA full length nucleic acid sequence (SEQ JD NO: 10).
- Figures 4A-4D shows an alignment of the human HtrA-2 nucleotide coding region (SEQ JD NO:2) with the human HtrA nucleotide coding region.
- Figures 5A-5B shows an alignment of the human HtrA-2 protein sequence (SEQ JD NO:3) with the human HtrA protein sequence (SEQ ED NO: 12).
- the human HtrA-2 signal sequence is represented by amino acids 1-17 (and encoded by nucleotides 222-272 of SEQ ED NO:l), and the human HtrA signal sequence is represented by amino acids 1-22 (and encoded by nucleotides 39-103 of SEQ JD NO:12).
- the human HtrA-2 IGF-binding domain sequence (SEQ ED NO:6) is represented by amino acids 18-78 (and encoded by nucleotides 273-455 of SEQ ED NO:l)(SEQ ED NO:), and the human HtrA IGF-binding sequence is represented by amino acids 37-94 (and encoded by nucleotides 147-320 of SEQ ED NO:12)(SEQ ED NO:).
- the human HtrA-2 Kazal protease inhibitor domain sequence (SEQ JD NO:7) is represented by amino acids 79-126 (and encoded by nucleotides 456-599 of SEQ ED NO:l)(SEQ LD NO:), and the human HtrA Kazal protease inhibitor domain sequence is represented by amino acids 110-155 (and encoded by nucleotides 366-503 of SEQ ED NO: 12)(SEQ ED NO:).
- the human HtrA-2 serine protease domain sequence (SEQ ED NO: 8) is represented by amino acids 140-347 (and encoded by nucleotides 639-1262 of SEQ ED NO:l)(SEQ LD NO:), and the human HtrA serine protease domain sequence is represented by amino acids 140-369 (and encoded by nucleotides 456-1145 of SEQ ED NO:12)(SEQ ED NO:).
- the human HtrA-2 PDZ domain sequence (SEQ ED NO:9) is represented by amino acids 348-439 (and encoded by nucleotides 1263-1538 of SEQ ID NO: 1)(SEQ ED NO:), and the human HtrA PDZ domain sequence is represented by amino acids 370-465 (and encoded by nucleotides 1146-1433 of SEQ JD NO: 12)(SEQ ED NO:).
- Figures 3A-3G and Figures 4A-4D show that there is an overall 50.9% identity between the full length human HtrA-2 nucleic acid molecule and the full length human HtrA nucleic acid molecule, and an overall 62.3% identity between the open reading frame of human HtrA-2 nucleic acid molecule (SEQ JD NO:2) and the open reading frame of the human HtrA nucleic acid molecule (SEQ JD NO:l 1), respectively.
- the amino acid alignment in Figures 5A-5B shows a 56.5% overall amino acid sequence identity between human HtrA-2 (SEQ EDNO:3) and human HtrA (SEQ ED NO: 12).
- Clone EpT214 which encodes human HtrA-2, was deposited with the American Type Culture Collection (10801 University Boulevard, Manassas, NA 20110-2209) on September 25, 1998 and assigned Accession Number 98899. This deposit will be maintained under the terms of the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure. This deposit was made merely as a convenience for those of skill in the art and is not an admission that a deposit is required under 35 U.S.C. ⁇ 112.
- Figure 2 depicts a hydropathy plot of human HtrA-2. Relatively hydrophobic regions of the protein are shown above the horizontal line, and relatively hydrophilic regions of the protein are below the horizontal line. The cysteine residues (cys) are indicated by short vertical lines just below the hydropathy trace.
- Northern analysis of HtrA-2 expression in human tissues showed that an approximately 2.6 kB transcript is expressed in human adult heart, skeletal muscle, lung, pancreas, and placenta. No expression was detected in the kidney or brain.
- Northern analysis of HtrA expression in human tissue indicated that an approximately 2.3 kB transcript is strongly expressed in human placenta, moderately expressed in human brain, liver, and kidney, and weakly expressed in human lung, skeletal muscle, heart, and pancreas.
- Library Array Expression Expression of human HtrA-2 mRNA was detected by a library array procedure. Briefly, this entailed preparing a PCR mixture by adding standard reagents (e.g., Taq Polymerase, dNTPs, and PCR buffer) a vector primer, a primer internal to the gene of interest, and an aliquot of a library in which expression was to be tested. This procedure was performed with many libraries at a time in a 96 well PCR tray, with 80 or more wells containing libraries and a control well in which the above primers were combined with the clone of interest itself. The control well served as an indicator of the fragment size to be expected in the library wells, in the event the clone of interest was expressed within.
- standard reagents e.g., Taq Polymerase, dNTPs, and PCR buffer
- This procedure was performed with many libraries at a time in a 96 well PCR tray, with 80 or more wells containing libraries and a control well in
- Amplification was performed in a PCR machine, employing standard PCR conditions for denaturing, annealing, and elongation, and the resultant mixture was mixed with an appropriate loading dye and run on an ethidium bromide-stained agarose gel. The gel was later viewed with UV light after the DNA loaded within its lanes had time to migrate into the gels. Lanes in which a band corresponding with the control band was visible indicated the libraries in which the clone of interest was expressed.
- a mouse homolog of human HtrA-2 was identified.
- a cDNA encoding mouse HtrA- 2 was identified by analyzing the sequences of clones present in a mouse cDNA library. This analysis led to the identification of a clone, Atmx2143, encoding full-length mouse HtrA-2.
- the murine HtrA-2 cDNA of this clone is 1563 nucleotides long ( Figure 8; SEQ LD NO:18).
- the open reading frame of this cDNA comprises nucleotides 268 to 1311 of SEQ ED NO: 18 (SEQ ED NO: 19), and encodes a 349 amino acid secreted protein ( Figure 8; SEQ ED NO:20).
- the nucleotide at position 396 is an guanine (G) (SEQ ED NO: 18).
- the amino acid at position 43 is glutamate (E)(SEQ ED NO:20)
- the nucleotide at position 396 is a cytosine (C)(SEQ JD NO:30).
- the amino acid at position 43 is aspartate (D)(SEQ ED NO:31)
- the nucleotide at position 426 is guanine (G)(SEQ ED NO: 18).
- the amino acid at position 53 is glutamate (E)(SEQ ED NO:20).
- the nucleotide at position 426 is cytosine (C)(SEQ ED NO:32).
- the amino acid at position 53 is aspartate (D)(SEQ ED NO:33).
- nucleotide at position 498 is guanine (G)(SEQ JD NO: 18).
- amino acid at position 77 is glutamate (E)(SEQ ED
- nucleotide sequence of mouse HtrA-2 Ln another embodiment of a nucleotide sequence of mouse HtrA-2, the nucleotide at position 498 is cytosine (C)(SEQ JD NO:34). In this embodiment, the amino acid at position 77 is aspartate (D)(SEQ ED NO:35).
- HtrA-2 mRNA expression in mouse In situ tissue screening was performed on mouse adult and embryonic tissue to analyze for the expression of mouse HtrA-2 mRNA.
- adult expression was highest in the bladder and present to a lesser extent in heart, muscle, and colon. Signal in these tissues was ubiquitous. All other adult tissues showed no specific signal above background.
- Expression at embryonic day 13.5 the earliest age tested, was observed in the stomach and brain. Expression pattern in brain was punctate, broadly distributed, and sparse. Beginning at E14.5 ubiquitous expression was also observed in skeletal muscle, diaphragm, intestine, and lung. This pattern continues until postnatal day 1.5, when expression was also apparent in the renal medulla. There was high background in what appears to be cartilage.
- the antisense probe showed a stronger signal in this tissue with a more extensive pattern.
- expression was ubiquitous in each of the bladder, heart, skeletal muscle, and colon. No expression was detected in the following tissues: lung, brain, placenta, liver, pancreas, thymus, eye, kidney, and the small intestine.
- the embryonic mouse the following results were obtained: At El 3.5, expression was detected in the stomach and brain. Signal was also observed in the limbs and vertebrae with the sense probe. This signal was much higher and more extensive with the antisense probe.
- E14.5, E15.5, E16.5, E18.5, and PI.5 a signal was punctuate in the brain, strong in renal medulla and absent from liver. Most other tissues had low level ubiquitous expression to some degree.
- HtrA-2 was originally found in an LPS-treated osteoblast library and is homologous to HtrA, mRNA levels of which are known to be elevated in cartilage from individuals with osteoarthritis, HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat bone and/or cartilage associated diseases or disorders.
- bone and/or cartilage diseases and disorders include bone and/or cartilage injury due to for example, trauma (e.g., bone breakage, cartilage tearing), degeneration (e.g., osteoporosis), degeneration of joints, e.g., arthritis, e.g., osteoarthritis, and bone wearing.
- HtrA-2 is highly expressed in heart tissue, and includes an IGF-binding domain, and thus likely has a role in modulating IGF function (e.g., IGF is involved in cardiac hype ⁇ lasia)
- HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat disorders of the cardiovascular system.
- disorders of the cardiovascular system include disorders associated with a lack of nutrients to the heart muscle, e.g., ischemic heart disease, atherosclerosis, disorders associated with abnormal mo ⁇ hology of the heart, e.g., cardiac hype ⁇ lasia, and disorders associated with abnormal contraction of the heart, e.g., ventricular fibrillation.
- HtrA-2 can modulate IGF function and thereby be used to treat IGF associated disorders.
- IGFs are known to be involved in the overall cellular growth of embryos and organs of mammals. When existing at excessive levels, however, IGFs can cause somatic overgrowth which leads to conditions such as visceromegaly, placentomegaly, cardiac and adrenal defects, and Beckwith-Weidermann syndrome.
- HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat IGF-associated disorders as described above.
- HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat proliferative disorders, e.g., cancer, e.g., cancer of a cell or tissue in which HtrA-2 is expressed.
- HtrA-2 can function in a similar manner as other proteins containing a Kazal protease inhibitor domain.
- follistatin includes a Kazal protease inhibitor domain. Follistatin regulates the availability of growth factors and embryonic growth, and thus modulators thereof can be used to treat disorders involving abnormal cellular migration, proliferation, and differentiation.
- HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat disorders involving abnormal cellular migration, proliferation (e.g., cancer), and/or differentiation, and/or follistatin-associated disorders.
- HtrA-2 includes a serine protease domain, it can act as a serine protease.
- HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat disorders involving abnormal serine protease function.
- serine protease inhibitors are abundant in plaques found in Alzheimer's patients, and may be responsible for preventing some types of metalloproteinase from breaking down the beta-amyloid proteins that make up these plaques.
- modulation of the HtrA-2 serine protease activity may modulate formation of Alzheimer's plaques. Consequently, HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat Alzheimer's disease.
- HtrA-2 functions in a manner similar to other PDZ-containing proteins.
- PDZ domains typically bind other proteins at their carboxyl termini in a sequence-specific manner.
- Human HtrA-2 nucleic acids, proteins, and modulators thereof can also be used to treat neurological disorders. Examples of such neurological disorders include disorders due to nerve damage (e.g., nerve damage due to stroke) and neurodegenerative diseases (e.g., Alzheimer's disease, multiple sclerosis, Huntington's disease, and Parkinson's disease).
- human HtrA-2 nucleic acids, polypeptides, and modulators thereof can be used to treat neurodegeneration associated with Alzheimer's disease, frontal lobe dementia, cortical lewy body disease, dementia of Parkinson's disease, acute and chronic phases of degeneration following stroke or head injury, neuronal degeneration found in motor neuron disease, AEDS dementia and chronic epilepsy.
- HtrA-2 can likely interact with a normal or mutated gene product of a human presenilin gene (e.g., human presenilin-1 (PS-1), e.g., the hydrophobic loop domain between transmembrane domains 1 and 2 of PS-1).
- PS-1 human presenilin-1
- HtrA-2 can interact with PS-1 and thus modulate PS-1 function
- HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat Alzheimer's disease and physiological functions associated with Alzheimer's disease.
- the PS-1 gene product may also be a receptor or channel protein, mutations in which have been causally related to neurological disorders whose pathology does not represent Alzheimer's disease.
- HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat non- Alzheimer's neurological disorders as well (e.g., malignant hyperthermia, hyperkalemic periodic paralysis).
- HtrA-2 nucleic acids, proteins, and modulators thereof can also be used to treat disorders of the cells and tissues in which it is expressed. As HtrA-2 is expressed in colon, bladder, skeletal muscle, lung, pancreas, and placenta, HtrA-2 nucleic acids, proteins, and modulators thereof can be used to treat disorders of these cells, tissues, or organs, e.g., colon cancer and colonic volvulus, diverticula, cystitis, urinary tract infection, bladder cancer, muscular dystrophy, stroke, muscular atrophy, trichinosis, lung cancer, cystic fibrosis, rheumatoid lung disease, pancreatic cancer, diabetes, pancreatitis, and various placental disorders.
- colon cancer and colonic volvulus diverticula, cystitis, urinary tract infection, bladder cancer, muscular dystrophy, stroke, muscular atrophy, trichinosis, lung cancer, cystic fibrosis, rheumatoid lung disease, pancreatic cancer,
- HtrA-2 nucleic acids, proteins and modulators thereof can be utilized to modulate adipocyte function and adipocyte-related processes and disorders such as, e.g., obesity, regulation of body temperature, lipid metabolism, carbohydrate metabolism, body weight regulation, obesity, anorexia nervosa, diabetes mellitus, unusual susceptibility or insensitivity to heat or cold, arteriosclerosis, atherosclerosis, and disorders involving abnormal vascularization, e.g., vascularization of solid tumors. Additionally, such molecules can be used to treat disorders associated with abnormal fat metabolism, e.g., cachexia. In another example, such molecules can be used to treat disorders associated with abnormal proliferation of these tissues, e.g., cancer, e.g., breast cancer or liver cancer.
- adipocyte function and adipocyte-related processes and disorders such as, e.g., obesity, regulation of body temperature, lipid metabolism, carbohydrate metabolism, body weight regulation, obesity, anorexia nervosa, diabetes mell
- a cDNA encoding human TANGO 219 was identified by analyzing the sequences of clones present in a prostate stroma cDNA library. This analysis led to the identification of a clone, jthqcl01c05, encoding full-length human TANGO 219.
- the human TANGO 219 cDNA of this clone is 1268 nucleotides long ( Figure 6; SEQ JD NO:13).
- nucleotide at position 186 is an guanine (G) (SEQ ED NO: 13).
- amino acid at position 186 is an guanine (G) (SEQ ED NO: 13).
- 5 position 27 is glutamate (E)(SEQ LD NO: 15)
- the nucleotide at position 186 is a cytosine (C)(SEQ JD NO:36).
- the amino acid at position 27 is aspartate (D)(SEQ ED NO:37)
- the nucleotide at position 261 is guanine (G)(SEQ JD NO: 13). In this embodiment, the amino acid at
- nucleotide 10 position 52 is glutamate (E)(SEQ ED NO: 15).
- nucleotide at position 261 is cytosine (C)(SEQ JD NO:38).
- amino acid at position 52 is aspartate (D)(SEQ ED NO:39).
- nucleotide at position 309 is adenine (A)(SEQ JD NO: 13). In this embodiment, the amino acid at position
- the amino acid at position 68 is aspartate (D)(SEQ ED NO:41).
- the signal peptide prediction program SIGNALP (Nielsen et al. (1997) Protein Engineering 10:1-6) predicted that human TANGO 219 includes an 18 amino acid signal
- TANGO 219 protein molecular weight is 17.0 kDa prior to the cleavage of the signal peptide, 14.8 kDa after cleavage of the signal peptide.
- 1.25 kB transcript is weakly expressed in the heart and not in other tissues tested such as, for example, brain, placenta, lung, liver, skeletal muscle, kidney, pancreas, stomach, thyroid, spinal cord, lymph node, adrenal gland, trachea, bone marrow, spleen, thymus, prostate, testes, ovary, small intestine, colon, and peripheral blood leukocytes.
- the human gene for TANGO 219 was mapped on radiation hybrid panels to the long arm of chromosome 5, in the region qll-11. Flanking markers for this region are NEB916 and D5S492.
- the MANA2 mannosidase, type2
- APC adenomatous polyposis coli
- PST polysialytransferase
- CAST calpastatin
- Figure 7 depicts a hydropathy plot of human TANGO 219. Relatively hydrophobic regions of the protein are shown above the horizontal line, and relatively hydrophilic regions of the protein are below the horizontal line. The cysteine residues (cys) and potential N-glycosylation sites (Ngly) are indicated by short vertical lines just below the hydropathy trace.
- a mouse homolog of human TANGO 219 was identified.
- a cDNA encoding mouse TANGO 219 was identified by analyzing the sequences of clones present in a mouse cDNA library. This analysis led to the identification of a clone encoding mouse TANGO 219.
- the murine TANGO 219 cDNA of this clone is 397 nucleotides long ( Figure 9; SEQ JD NO:21).
- the open reading frame of this cDNA comprises nucleotides 2 to 370 of SEQ JD NO:(SEQ ED NO:22), and encodes a secreted protein comprising the 123 amino acid sequence depicted in Figure 9 (SEQ LD NO:23).
- the nucleotide at position 127 is an guanine (G) (SEQ ED NO:21).
- the amino acid at position 42 is glutamate (E)(SEQ ED NO:23)
- the nucleotide at position 127 is a cytosine (C)(SEQ JD NO:42).
- the amino acid at position 42 is aspartate (D)(SEQ ED NO:43)
- the nucleotide at position 154 is guanine (G)(SEQ LD NO:21).
- the amino acid at position 51 is glutamate (E)(SEQ JD NO:23).
- the nucleotide at position 154 is cytosine (C)(SEQ ED NO:44).
- the amino acid at position 51 is aspartate (D)(SEQ ED NO:45).
- the nucleotide at position 226 is adenine (A)(SEQ ED NO:21).
- the amino acid at position 75 is glutamate (E)(SEQ ED NO:23).
- the nucleotide at position 226 is cytosine (C)(SEQ JD NO:46).
- the amino acid at position 75 is aspartate (D)(SEQ ED NO:47).
- mouse TANGO 219 includes a 40 amino acid signal peptide (amino acid 1 to about amino acid 40 of SEQ ED NO:23)(SEQ ED NO:34) preceding the mature mouse TANGO 219 protein (corresponding to about amino acid 41 to amino acid 123 of SEQ ED NO:23)(SEQ ED NO:35).
- the TANGO 219 protein molecular weight is 17.0 kDa prior to the cleavage of the signal peptide, 14.8 kDa after cleavage of the signal peptide.
- TANGO 219 Nucleic acids, Polypeptides, and Modulators Thereof
- TANGO 219 was originally found in a prostate stroma library, TANGO 219 nucleic acids, proteins, and modulators thereof can be used to modulate the proliferation, differentiation, and/or function, e.g., secretory activity, of the prostate cells.
- Such molecules can also be useful for treatment of prostate diseases or disorders, e.g., acute or chronic prostatitis (and the resulting urinary tract infection), benign nodular enlargement, and prostatic carcinoma.
- TANGO 219 appears to be preferentially expressed in the heart and not in many other tissues, TANGO 219 nucleic acids, proteins, and modulators thereof can be used to modulate the proliferation, differentiation, and/or function of cardiac cells.
- TANGO 219 plays a role in regulating cardiac function, including modulating cardiac rhythm and strength of contraction, and the heart's response to stress.
- Such molecules can also be useful for treatment of heart diseases or conditions, e.g., ischemic heart disease or atherosclerosis, or cerebrovascular accidents, or more particularly, treating or preventing conditions involving heart contraction, and the impulse generating nodes and cardiac muscle cells, e.g., ventricular fibrillation or myocardial infarction.
- Tables 1, and 2 below provide a summary of the sequence information for human
- Table 3 below provides a summary of the sequence information for mouse HtrA-2 and mouse TANGO 219.
- TABLE 1 Summary of Human HtrA-2 and Human TANGO 219 Sequence Information
- nucleic acid molecules that encode a polypeptide of the invention or a biologically active portion thereof, as well as nucleic acid molecules sufficient for use as hybridization probes to identify nucleic acid molecules encoding a polypeptide of the invention and fragments of such nucleic acid molecules suitable for use as PCR primers for the amplification or mutation of nucleic acid molecules.
- nucleic acid molecule is intended to include DNA molecules (e.g., cDNA or genomic DNA) and RNA molecules (e.g., mRNA) and analogs of the DNA or RNA generated using nucleotide analogs.
- the nucleic acid molecule can be single-stranded or double-stranded, but preferably is double-stranded DNA.
- an “isolated” nucleic acid molecule is one which is separated from other nucleic acid molecules which are present in the natural source of the nucleic acid molecule.
- an “isolated” nucleic acid molecule is free of sequences (preferably protein encoding sequences) which naturally flank the nucleic acid (i.e., sequences located at the 5' and 3' ends of the nucleic acid) in the genomic DNA of the organism from which the nucleic acid is derived.
- the isolated nucleic acid molecule can contain less than about 5 kB, 4 kB, 3 kB, 2 kB, 1 kB, 0.5 kB or 0.1 kB of nucleotide sequences which naturally flank the nucleic acid molecule in genomic DNA of the cell from which the nucleic acid is derived.
- an "isolated" nucleic acid molecule such as a cDNA molecule, can be substantially free of other cellular material, or culture medium when produced by recombinant techniques, or substantially free of chemical precursors or other chemicals when chemically synthesized.
- a nucleic acid molecule of the present invention e.g., a nucleic acid molecule having the nucleotide sequence of SEQ ED NO:l, 2, 13, 14, 18, 19, 21, 22 or a complement thereof, can be isolated using standard molecular biology techniques and the sequence information provided herein. Using all or a portion of the nucleic acid sequences of SEQ ED NO:l, 2, 13, 14, 18, 19, 21, 22 as a hybridization probe, nucleic acid molecules of the invention can be isolated using standard hybridization and cloning techniques (e.g., as described in Sambrook et al., eds., Molecular Cloning: A Laboratory Manual, 2nd ed., Cold Spring Harbor Laboratory, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY, 1989).
- a nucleic acid molecule of the invention can be amplified using cDNA, mRNA or genomic DNA as a template and appropriate oligonucleotide primers according to standard PCR amplification techniques.
- the nucleic acid so amplified can be cloned into an appropriate vector and characterized by DNA sequence analysis.
- oligonucleotides corresponding to all or a portion of a nucleic acid molecule of the invention can be prepared by standard synthetic techniques, e.g., using an automated DNA synthesizer.
- an isolated nucleic acid molecule of the invention comprises a nucleic acid molecule which is a complement of the nucleotide sequence of SEQ ED NO:l, 2, 13, 14, 18, 19, 21, 22, or a portion thereof.
- a nucleic acid molecule which is complementary to a given nucleotide sequence is one which is sufficiently complementary to the given nucleotide sequence that it can hybridize to the given nucleotide sequence thereby forming a stable duplex.
- a nucleic acid molecule of the invention can comprise only a portion of a nucleic acid sequence encoding a full length polypeptide of the invention for example, a fragment which can be used as a probe or primer or a fragment encoding a biologically active portion of a polypeptide of the invention.
- the nucleotide sequence determined from the cloning one gene allows for the generation of probes and primers designed for use in identifying and/or cloning homologues in other cell types, e.g., from other tissues, as well as homologues from other mammals.
- the probe/primer typically comprises substantially purified oligonucleotide.
- the oligonucleotide typically comprises a region of nucleotide sequence that hybridizes under stringent conditions to at least about 12, preferably about 25, more preferably about 50, 75, 100, 125, 150, 175, 200, 250, 300, 350 or 400 consecutive nucleotides of the sense or anti-sense sequence of SEQ JD NO:l, 2, 13, 14, 18, 19, 21, 22 or of a naturally occurring mutant of SEQ JD NO:l, 2, 13, 14, 18, 19, 21, 22.
- Probes based on the sequence of a nucleic acid molecule of the invention can be used to detect transcripts or genomic sequences encoding the same protein molecule encoded by a selected nucleic acid molecule.
- the probe comprises a label group attached thereto, e.g., a radioisotope, a fluorescent compound, an enzyme, or an enzyme co- factor.
- Such probes can be used as part of a diagnostic test kit for identifying cells or tissues which mis-express the protein, such as by measuring levels of a nucleic acid molecule encoding the protein in a sample of cells from a subject, e.g., detecting mRNA levels or determining whether a gene encoding the protein has been mutated or deleted.
- a nucleic acid fragment encoding a "biologically active portion" of a polypeptide of the invention can be prepared by isolating a portion of any of SEQ ED NO:2,14, 19, or 22, expressing the encoded portion of the polypeptide protein (e.g., by recombinant expression in vitro) and assessing the activity of the encoded portion of the polypeptide.
- the invention further encompasses nucleic acid molecules that differ from the nucleotide sequence of SEQ ED NO:l, 2, 13, 14, 18, 19, 21, 22, due to degeneracy of the genetic code and thus encode the same protein as that encoded by the nucleotide sequence of SEQ ED NO:2, 14, 19, or 22.
- DNA sequence polymo ⁇ hisms that lead to changes in the amino acid sequence may exist within a population (e.g., the human population). Such genetic polymo ⁇ hisms may exist among individuals within a population due to natural allelic variation. An allele is one of a group of genes which occur alternatively at a given genetic locus.
- TANGO 219 has been mapped to chromosome 5, between flanking markers NEB916 and D5S492, and therefore, TANGO 219 family members can include nucleotide sequence polymo ⁇ hisms (e.g., nucleotide sequences that vary from SEQ ED NO:) that map to this chromosome 5 region (i.e., between markers NEB916 and D5S492).
- nucleotide sequence polymo ⁇ hisms e.g., nucleotide sequences that vary from SEQ ED NO:
- the phrase "allelic variant” refers to a nucleotide sequence which occurs at a given locus or to a polypeptide encoded by the nucleotide sequence.
- the terms "gene” and “recombinant gene” refer to nucleic acid molecules comprising an open reading frame encoding a polypeptide of the invention.
- Such natural allelic variations can typically result in 1-5% variance in the nucleotide sequence of a given gene.
- Alternative alleles can be identified by sequencing the gene of interest in a number of different individuals. This can be readily carried out by using hybridization probes to identify the same genetic locus in a variety of individuals. Any and all such nucleotide variations and resulting amino acid polymo ⁇ hisms or variations that are the result of natural allelic variation and that do not alter the functional activity are intended to be within the scope of the invention.
- nucleic acid molecules encoding proteins of the invention from other species which have a nucleotide sequence which differs from that of the human protein described herein are intended to be within the scope of the invention.
- Nucleic acid molecules corresponding to natural allelic variants and homologues of a cDNA of the invention can be isolated based on their identity to the human nucleic acid molecule disclosed herein using the human cDNAs, or a portion thereof, as a hybridization probe according to standard hybridization techniques under stringent hybridization conditions.
- a cDNA encoding a soluble form of a membrane- bound protein of the invention isolated based on its hybridization to a nucleic acid molecule encoding all or part of the membrane-bound form.
- a cDNA encoding a membrane-bound form can be isolated based on its hybridization to a nucleic acid molecule encoding all or part of the soluble form.
- an isolated nucleic acid molecule of the invention is at least 300 (325, 350, 375, 400, 425, 450, 500, 550, 600, 650, 700, 800, 900, 1000, or 1290) nucleotides in length and hybridizes under stringent conditions to the nucleic acid molecule comprising the nucleotide sequence, preferably the coding sequence, of SEQ ED NO:l, 2, 13, 14, 18, 19, 21, 22, or a complement thereof.
- hybridizes under stringent conditions is intended to describe conditions for hybridization and washing under which nucleotide sequences at least 60% (65%, 70%, preferably 75%) identical to each other typically remain hybridized
- stringent hybridization conditions are known to those skilled in the art and can be found in Current Protocols in Molecular Biology, John Wiley & Sons, N.Y. (1989), 6.3.1-6.3.6.
- a preferred, non-limiting example of stringent hybridization conditions are hybridization in 6X sodium chloride/sodium citrate (SSC) at about 45EC, followed by one or more washes in 0.2 X SSC, 0.1% SDS at 50-65EC.
- SSC sodium chloride/sodium citrate
- SSC 6X sodium chloride/sodium citrate
- an isolated nucleic ⁇ acid molecule of the invention that hybridizes under stringent conditions to the sequence of SEQ JD NO:l, 2, 13, 14, 18, 19, 21, 22, or a complement thereof, corresponds to a naturally-occurring nucleic acid molecule.
- a "naturally-occurring" nucleic acid molecule refers to an RNA or DNA molecule having a nucleotide sequence that occurs in nature (e.g., encodes a natural protein).
- Representative species that hybridize under such conditions to one or more of the sequences above include, but are not limited to, SEQ ED NO:24, 26, and 28, which in particular hybridize to the human HtrA-2 sequences listed above (SEQ ED NOs: 1 and 2).
- Representative species that hybridize under such conditions to one or more of the sequences above include, but are not limited to, SEQ ED NO:30, 32, and 34, which in particular hybridize to the mouse
- SEQ ED NOs: 18 and 20 Representative species that hybridize under such conditions to one or more of the sequences above include, but are not limited to, SEQ ED NO:36, 38, and 40, which in particular hybridize to the human TANGO 219 sequences listed above (SEQ ED NOs:13 and 14). Representative species that hybridize under such conditions to one or more of the sequences above include, but are not limited to, SEQ ED NO:36, 38, and 40, which in particular hybridize to the human TANGO 219 sequences listed above (SEQ ED NOs:13 and 14). Representative species that hybridize under such conditions to one or more of the sequences above include, but
- SEQ ED NO:42, 44, and 46 which in particular hybridize to the mouse TANGO 219 sequences listed above (SEQ ED NOs: 21 and 22).
- allelic variants of a nucleic acid molecule of the invention sequence that may exist in the population, the skilled artisan will further appreciate that changes can be introduced by mutation thereby leading to changes in the
- amino acid sequence of the encoded protein without altering the biological activity of the protein. For example, one can make nucleotide substitutions leading to amino acid substitutions at "non-essential" amino acid residues.
- a "non-essential” amino acid residue is a residue that can be altered from the wild-type sequence without altering the biological activity, whereas an "essential" amino acid residue is required for biological
- amino acid residues that are not conserved or only semi-conserved among homologues of various species may be non-essential for activity and thus would be likely targets for alteration.
- amino acid residues that are conserved among the homologues of various species e.g., murine and human
- representative species of the human HtrA-2 presented for illustrative pu ⁇ oses only and not by way of limitation include but are not limited to, SEQ ED NOs:25, 27, and 29.
- representative species of the mouse HtrA-2 presented for illustrative pu ⁇ oses only and not by way of limitation include but are not limited to, SEQ ED NOs:31, 33, and 35.
- representative species of the human TANGO 219 presented for illustrative pu ⁇ oses only and not by way of limitation include but are not limited to, SEQ ED NOs:37, 39, and 41.
- representative species of the mouse TANGO 219 presented for illustrative pu ⁇ oses only and not by way of limitation include but are not limited to, SEQ JD NOs:43, 45, and 47.
- nucleic acid molecules encoding a polypeptide of the invention that contain changes in amino acid residues that are not essential for activity. Such polypeptides differ in amino acid sequence from SEQ ID NO: 3 or 14, yet retain biological activity.
- the isolated nucleic acid molecule includes a nucleotide sequence encoding a protein that includes an amino acid sequence that is at least about 45% identical, 65%, 75%, 85%, 95%, or 98% identical to the amino acid sequence of SEQ ED NO:3, 15, 20, or 23.
- An isolated nucleic acid molecule encoding a variant protein can be created by introducing one or more nucleotide substitutions, additions or deletions into the nucleotide sequence of SEQ ED NO:l, 2, 13, 14, 18, 19, 21, 22 such that one or more amino acid substitutions, additions or deletions are introduced into the encoded protein.
- variant proteins retain or exhibit at least one structural or biological activity of the polypeptides of the invention.
- Mutations can be introduced by standard techniques, such as site-directed mutagenesis and PCR-mediated mutagenesis.
- conservative amino acid substitutions are made at one or more predicted non- essential amino acid residues.
- a “conservative amino acid substitution” is one in which the amino acid residue is replaced with an amino acid residue having a similar side chain.
- Families of amino acid residues having similar side chains have been defined in the art. These families include amino acids with basic side chains (e.g., lysine, arginine, histidine), acidic side chains (e.g., aspartic acid, glutamic acid), uncharged polar side chains (e.g., glycine, asparagine, glutamine, serine, threonine, tyrosine, cysteine), nonpolar side chains (e.g., alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan), beta-branched side chains (e.g., threonine, valine, isoleucine) and aromatic side chains (e.g., tyrosine, phenylalanine, tryptophan, histidine).
- mutations can be introduced randomly along all or part of the coding sequence, such as by saturation mutagenesis, and the resultant mutants can be screened for biological activity to identify mutants that retain activity.
- the encoded protein can be expressed recombinantly and the activity of the protein can be determined.
- a mutant polypeptide that is a variant of a polypeptide of the invention can be assayed for: (1) the ability to form protei protein interactions with proteins in a signaling pathway of the polypeptide of the invention; (2) the ability to bind a ligand of the polypeptide of the invention; or (3) the ability to bind to an intracellular target protein of the polypeptide of the invention.
- the mutant polypeptide can be assayed for the ability to modulate cellular proliferation, cellular migration or chemotaxis, or cellular differentiation.
- the present invention encompasses antisense nucleic acid molecules, i.e., molecules which are complementary to a sense nucleic acid encoding a polypeptide of the invention, e.g., complementary to the coding strand of a double-stranded cDNA molecule or complementary to an mRNA sequence. Accordingly, an antisense nucleic acid can hydrogen bond to a sense nucleic acid.
- the antisense nucleic acid can be complementary to an entire coding strand, or to only a portion thereof, e.g., all or part of the protein coding region (or open reading frame).
- An antisense nucleic acid molecule can be antisense to all or part of a non-coding region of the coding strand of a nucleotide sequence encoding a polypeptide of the invention.
- the non-coding regions (“5' and 3' untranslated regions") are the 5' and 3' sequences which flank the coding region and are not translated into amino acids.
- An antisense oligonucleotide can be, for example, about 5, 10, 15, 20, 25, 30, 35, 40, 45 or 50 nucleotides or more in length.
- An antisense nucleic acid of the invention can be constructed using chemical synthesis and enzymatic ligation reactions using procedures known in the art.
- an antisense nucleic acid e.g., an antisense oligonucleotide
- an antisense nucleic acid can be chemically synthesized using naturally occurring nucleotides or variously modified nucleotides designed to increase the biological stability of the molecules or to increase the physical stability of the duplex formed between the antisense and sense nucleic acids, e.g., phosphorothioate derivatives and acridine substituted nucleotides can be used.
- modified nucleotides which can be used to generate the antisense nucleic acid include 5-fluorouracil, 5-bromouracil, 5-chlorouracil, 5-iodouracil, hypoxanthine, xanthine, 4-acetylcytosine, 5-(carboxyhydroxylmethyl) uracil, 5-carboxymethylaminomethyl-2-thiouridine, 5-carboxymethylaminomethyluracil, dihydrouracil, beta-D-galactosylqueosine, inosine, N6-isopentenyladenine, 1- methylguanine, 1-methylinosine, 2,2-dimethylguanine, 2-methyladenine, 2- methylguanine, 3-methylcytosine, 5-methylcytosine, N6-adenine, 7-methylguanine, 5- methylaminomethyluracil, 5 -methoxyaminomethyl-2-thiouracil, beta-D- mannosylqueosine, 5'
- the antisense nucleic acid can be produced biologically using an expression vector into which a nucleic acid has been subcloned in an antisense orientation (i.e., RNA transcribed from the inserted nucleic acid will be of an antisense orientation to a target nucleic acid of interest, described further in the following subsection).
- the antisense nucleic acid molecules of the invention are typically administered to a subject or generated in situ such that they hybridize with or bind to cellular mRNA and/or genomic DNA encoding a selected polypeptide of the invention to thereby inhibit expression, e.g., by inhibiting transcription and/or translation.
- the hybridization can be by conventional nucleotide complementarity to form a stable duplex, or, for example, in the case of an antisense nucleic acid molecule which binds to DNA duplexes, through specific interactions in the major groove of the double helix.
- An example of a route of administration of antisense nucleic acid molecules of the invention includes direct injection at a tissue site.
- antisense nucleic acid molecules can be modified to target selected cells and then administered systemically.
- antisense molecules can be modified such that they specifically bind to receptors or antigens expressed on a selected cell surface, e.g., by linking the antisense nucleic acid molecules to peptides or antibodies which bind to cell surface receptors or antigens.
- the antisense nucleic acid molecules can also be delivered to cells using the vectors described herein. To achieve sufficient intracellular concentrations of the antisense molecules, vector constructs in which the antisense nucleic acid molecule is placed under the control of a strong pol II or pol ELI promoter are preferred.
- An antisense nucleic acid molecule of the invention can be an ⁇ -anomeric nucleic acid molecule.
- An ⁇ -anomeric nucleic acid molecule forms specific double-stranded hybrids with complementary RNA in which, contrary to the usual ⁇ -units, the strands run parallel to each other (Gaultier et al. (1987) Nucleic Acids Res. 15:6625-6641).
- the antisense nucleic acid molecule can also comprise a 2'-o-methylribonucleotide (Inoue et al. (1987) Nucleic Acids Res. 15:6131-6148) or a chimeric RNA-DNA analogue (Inoue et al. (1987) FEBS Lett.
- Ribozymes are catalytic RNA molecules with ribonuclease activity which are capable of cleaving a single-stranded nucleic acid, such as an mRNA, to which they have a complementary region.
- ribozymes e.g., hammerhead ribozymes (described in Haselhoff and Gerlach (1988) Nature 334:585-591)
- a ribozyme having specificity for a nucleic acid molecule encoding a polypeptide of the invention can be designed based upon the nucleotide sequence of a cDNA disclosed herein.
- a derivative of a Tetrahymena L-19 EVS RNA can be constructed in which the nucleotide sequence of the active site is complementary to the nucleotide sequence to be cleaved in a Cech et al. U.S. Patent No. 4,987,071; and Cech et al. U.S. Patent No. 5,116,742.
- an mRNA encoding a polypeptide of the invention can be used to select a catalytic RNA having a specific ribonuclease activity from a pool of RNA molecules. See, e.g., Bartel and Szostak (1993) Science 261 :1411-1418.
- the invention also encompasses nucleic acid molecules which form triple helical structures.
- expression of a polypeptide of the invention can be inhibited by targeting nucleotide sequences complementary to the regulatory region of the gene encoding the polypeptide (e.g., the promoter and/or enhancer) to form triple helical structures that prevent transcription of the gene in target cells.
- nucleotide sequences complementary to the regulatory region of the gene encoding the polypeptide e.g., the promoter and/or enhancer
- the nucleic acid molecules of the invention can be modified at the base moiety, sugar moiety or phosphate backbone to improve, e.g., the stability, hybridization, or solubility of the molecule.
- the deoxyribose phosphate backbone of the nucleic acids can be modified to generate peptide nucleic acids (see Hyrup et al. (1996) Bioorganic & Medicinal Chemistry 4(1): 5-23).
- peptide nucleic acids refer to nucleic acid mimics, e.g., DNA mimics, in which the deoxyribose phosphate backbone is replaced by a pseudopeptide backbone and only the four natural nucleobases are retained.
- the neutral backbone of PNAs has been shown to allow for specific hybridization to DNA and RNA under conditions of low ionic strength.
- the synthesis of PNA oligomers can be performed using standard solid phase peptide synthesis protocols as described in Hyrup et al. (1996), supra; Perry-O'Keefe et al. (1996) Proc. Natl Acad. Sci. USA 93: 14670-675.
- PNAs can be used in therapeutic and diagnostic applications.
- PNAs can be used as antisense or antigene agents for sequence-specific modulation of gene expression by, e.g., inducing transcription or translation arrest or inhibiting replication.
- PNAs can also be used, e.g., in the analysis of single base pair mutations in a gene by, e.g., PNA directed PCR clamping; as artificial restriction enzymes when used in combination with other enzymes, e.g., SI nucleases (Hyrup (1996), supra; or as probes or primers for DNA sequence and hybridization (Hyrup (1996), supra; Perry-O'Keefe et al. (1996) Proc. Natl. Acad. Sci. USA 93: 14670-675).
- PNAs can be modified, e.g., to enhance their stability or cellular uptake, by attaching lipophilic or other helper groups to PNA, by the formation of PNA-DNA chimeras, or by the use of liposomes or other techniques of drug delivery known in the art.
- PNA-DNA chimeras can be generated which may combine the advantageous properties of PNA and DNA.
- Such chimeras allow DNA recognition enzymes, e.g., RNAse H and DNA polymerases, to interact with the DNA portion while the PNA portion would provide high binding affinity and specificity.
- PNA- DNA chimeras can be linked using linkers of appropriate lengths selected in terms of base stacking, number of bonds between the nucleobases, and orientation (Hyrup (1996), supra).
- the synthesis of PNA-DNA chimeras can be performed as described in Hyrup (1996), supra, and Finn et al. (1996) Nucleic Acids Res. 24(17):3357-63.
- a DNA chain can be synthesized on a solid support using standard phosphoramidite coupling chemistry and modified nucleoside analogs.
- the oligonucleotide may include other appended groups such as peptides (e.g., for targeting host cell receptors in vivo), or agents facilitating transport across the cell membrane (see, e.g., Letsinger et al. (1989) Proc. Natl Acad. Sci. USA 86:6553-6556; Lemaitre et al. (1987) Proc. Natl. Acad. Sci. USA 84:648-652; PCT Publication No. W0 88/09810) or the blood-brain barrier (see, e.g., PCT Publication No. WO 89/10134).
- peptides e.g., for targeting host cell receptors in vivo
- agents facilitating transport across the cell membrane see, e.g., Letsinger et al. (1989) Proc. Natl Acad. Sci. USA 86:6553-6556; Lemaitre et al. (1987) Proc. Natl. Aca
- oligonucleotides can be modified with hybridization- triggered cleavage agents (see, e.g., Krol et al. (1988) Bio/Techniques 6:958-976) or intercalating agents (see, e.g., Zon (1988) Pharm. Res. 5:539-549).
- the oligonucleotide maybe conjugated to another molecule, e.g., a peptide, hybridization 5 triggered cross-linking agent, transport agent, hybridization-triggered cleavage agent, etc.
- One aspect of the invention pertains to isolated proteins, and biologically active portions thereof, as well as polypeptide fragments suitable for use as immunogens to raise
- polypeptide of the invention can be isolated from cells or tissue sources by an appropriate purification scheme using standard protein purification techniques.
- polypeptides of the invention are produced by recombinant DNA techniques.
- a polypeptide of the invention can be synthesized chemically
- an “isolated” or “purified” protein or biologically active portion thereof is substantially free of cellular material or other contaminating proteins from the cell or tissue source from which the protein is derived, or substantially free of chemical precursors or other chemicals when chemically synthesized.
- protein that is substantially free of cellular material includes preparations of protein having less than about 30%, 20%, 10%, or 5% (by dry weight) of heterologous protein (also referred to herein as a "contaminating protein").
- 25 protein or biologically active portion thereof is recombinantly produced, it is also preferably substantially free of culture medium, i.e., culture medium represents less than about 20%, 10%, or 5% of the volume of the protein preparation.
- culture medium represents less than about 20%, 10%, or 5% of the volume of the protein preparation.
- the protein is produced by chemical synthesis, it is preferably substantially free of chemical precursors or other chemicals, i.e., it is separated from chemical precursors or other chemicals which
- Such preparations of the protein have less than about 30%, 20%, 10%, 5% (by dry weight) of chemical precursors or compounds other than the polypeptide of interest.
- Biologically active portions of a polypeptide of the invention include polypeptides _ ⁇ . comprising amino acid sequences sufficiently identical to or derived from the amino acid sequence of the protein (e.g., the amino acid sequence shown in any of SEQ ED NO:3, 4, 15, 16, 20, 23, 24, or 35), which include fewer amino acids than the full length protein, and exhibit at least one activity of the corresponding full-length protein.
- biologically active portions comprise a domain or motif with at least one activity of the corresponding protein.
- a biologically active portion of a protein of the invention can be a polypeptide which is, for example, 10, 25, 50, 100 or more amino acids in length.
- other biologically active portions, in which other regions of the protein are deleted can be prepared by recombinant techniques and evaluated for one or more of the functional activities of the native form of a polypeptide of the invention.
- Preferred polypeptides have the amino acid sequence of SEQ ED NO:3, 4, 15, 16, 20, 23, 24, or 35.
- Other useful proteins are substantially identical (e.g., at least about
- the sequences are aligned for optimal comparison pu ⁇ oses (e.g., gaps can be introduced in the sequence of a first amino acid or nucleic acid sequence for optimal alignment with a second amino or nucleic acid sequence).
- the amino acid residues or nucleotides at corresponding amino acid positions or nucleotide positions are then compared. When a position in the first sequence is occupied by the same amino acid residue or nucleotide as the corresponding position in the second sequence, then the molecules are identical at that position.
- the determination of percent identity between two sequences can be accomplished using a mathematical algorithm.
- a preferred, non-limiting example of a mathematical algorithm utilized for the comparison of two sequences is the algorithm of Karlin and Altschul (1990) Proc. Natl. Acad. Sci. USA 81:1164-1168, modified as in Karlin and Altschul (1993) Proc. Natl. Acad. Sci. USA 90:5873-5877.
- Such an algorithm is inco ⁇ orated into the NBLAST and XBLAST programs of Altschul, et al. (1990) J. Mol. Biol 215:403-410.
- Gapped BLAST can be utilized as described in Altschul et al. (1997) Nucleic Acids Res. 25:3389-3402.
- PSI-Blast can be used to perform an iterated search which detects distant relationships between molecules (Id.).
- BLAST Gapped BLAST
- PSI-Blast programs the default parameters of the respective programs (e.g., XBLAST and NBLAST) can be used. See http://www.ncbi.nlm.nih.gov.
- Another preferred, non-limiting example of a mathematical algorithm utilized for the comparison of sequences is the algorithm of Myers and Miller, (1988) CABIOS 4:11-17. Such an algorithm is inco ⁇ orated into the ALIGN program (version 2.0) which is part of the GCG sequence alignment software package.
- ALIGN program version 2.0
- the percent identity between two sequences can be determined using techniques similar to those described above, with or without allowing gaps. In calculating percent identity, only exact matches are counted.
- a "chimeric protein” or “fusion protein” comprises all or part (preferably biologically active) of a polypeptide of the invention operably linked to a heterologous polypeptide (i.e., a polypeptide other than the same polypeptide of the invention).
- a heterologous polypeptide i.e., a polypeptide other than the same polypeptide of the invention.
- the term "operably linked” is intended to indicate that the polypeptide of the invention and the heterologous polypeptide are fused in-frame to each other.
- the heterologous polypeptide can be fused to the N-terminus or C-terminus of the polypeptide of the invention.
- One useful fusion protein is a GST fusion protein in which the polypeptide of the invention is fused to the C-terminus of GST sequences. Such fusion proteins can facilitate the purification of a recombinant polypeptide of the invention.
- the fusion protein contains a heterologous signal sequence at its N-terminus.
- the native signal sequence of a polypeptide of the invention can be removed and replaced with a signal sequence from another protein.
- the gp67 secretory sequence of the baculovirus envelope protein can be used as a heterologous signal sequence (Current Protocols in Molecular Biology, Ausubel et al., eds., John Wiley & Sons, 1992).
- Other examples of eukaryotic heterologous signal sequences include the secretory sequences of melittin and human placental alkaline phosphatase (Sfratagene; La Jolla, California).
- useful prokaryotic heterologous signal sequences include the phoA secretory signal (Sambrook et al., supra) and the protein A secretory signal (Pharmacia Biotech; Piscataway, New Jersey).
- the fusion protein is an immunoglobulin fusion protein in which all or part of a polypeptide of the invention is fused to sequences derived from a member of the immunoglobulin protein family.
- the immunoglobulin fusion proteins of the invention can be inco ⁇ orated into pharmaceutical compositions and administered to a subject to inhibit an interaction between a ligand (soluble or membrane- bound) and a protein on the surface of a cell (receptor), to thereby suppress signal transduction in vivo.
- the immunoglobulin fusion protein can be used to affect the bioavailability of a cognate ligand of a polypeptide of the invention.
- Inhibition of ligand/receptor interaction may be useful therapeutically, both for treating proliferative and differentiative disorders and for modulating (e.g. promoting or inhibiting) cell survival.
- the immunoglobulin fusion proteins of the invention can be used as immunogens to produce antibodies directed against a polypeptide of the invention in a subject, to purify ligands and in screening assays to identify molecules which inhibit the interaction of receptors with ligands.
- Chimeric and fusion proteins of the invention can be produced by standard recombinant DNA techniques.
- the fusion gene can be synthesized by conventional techniques including automated DNA synthesizers.
- PCR amplification of gene fragments can be carried out using anchor primers which give rise to complementary overhangs between two consecutive gene fragments which can subsequently be annealed and reamplified to generate a chimeric gene sequence (see, e.g., Ausubel et al., supra).
- many expression vectors are commercially available that already encode a fusion moiety (e.g., a GST polypeptide).
- a nucleic acid encoding a polypeptide of the invention can be cloned into such an expression vector such that the fusion moiety is linked in-frame to the polypeptide of the invention.
- a signal sequence of a polypeptide of the invention can be used to facilitate secretion and isolation of the secreted protein or other proteins of interest.
- Signal sequences are typically characterized by a core of hydrophobic amino acids which are generally cleaved from the mature protein during secretion in one or more cleavage events.
- Such signal peptides contain processing sites that allow cleavage of the signal sequence from the mature proteins as they pass through the secretory pathway.
- the invention pertains to the described polypeptides having a signal sequence, as well as to the signal sequence itself and to the polypeptide in the absence of the signal sequence (i.e., the cleavage products).
- a nucleic acid sequence encoding a signal sequence of the invention can be operably linked in an expression vector to a protein of interest, such as a protein which is ordinarily not secreted or is otherwise difficult to isolate.
- the signal sequence directs secretion of the protein, such as from a eukaryotic host into which the expression vector is transformed, and the signal sequence is subsequently or concurrently cleaved.
- the protein can then be readily purified from the extracellular medium by art recognized methods.
- the signal sequence can be linked to the protein of interest using a sequence which facilitates purification, such as with a GST domain.
- the signal sequences of the present invention can be used to identify regulatory sequences, e.g., promoters, enhancers, repressors. Since signal sequences are the most amino-terminal sequences of a peptide, it is expected that the nucleic acids which flank the signal sequence on its amino-terminal side will be regulatory sequences which affect transcription. Thus, a nucleotide sequence which encodes all or a portion of a signal sequence can be used as a probe to identify and isolate signal sequences and their flanking regions, and these flanking regions can be studied to identify regulatory elements therein.
- regulatory sequences e.g., promoters, enhancers, repressors.
- the present invention also pertains to variants of the polypeptides of the invention.
- variants have an altered amino acid sequence which can function as either agonists (mimetics) or as antagonists.
- Variants can be generated by mutagenesis, e.g., discrete point mutation or truncation.
- An agonist can retain substantially the same, or a subset, of the biological activities of the naturally occurring form of the protein.
- An antagonist of a protein can inhibit one or more of the activities of the naturally occurring form of the protein by, for example, competitively binding to a downstream or upstream member of a cellular signaling cascade which includes the protein of interest.
- specific biological effects can be elicited by treatment with a variant of limited function. Treatment of a subject with a variant having a subset of the biological activities of the naturally occurring form of the protein can have fewer side effects in a subject relative to treatment with the naturally occurring form of the protein.
- Variants of a protein of the invention which function as either agonists (mimetics) or as antagonists can be identified by screening combinatorial libraries of mutants, e.g., truncation mutants, of the protein of the invention for agonist or antagonist activity.
- a variegated library of variants is generated by combinatorial mutagenesis at the nucleic acid level and is encoded by a variegated gene library.
- a variegated library of variants can be produced by, for example, enzymatically ligating a mixture of synthetic oligonucleotides into gene sequences such that a degenerate set of potential protein sequences is expressible as individual polypeptides, or alternatively, as a set of larger fusion proteins (e.g., for phage display).
- methods which can be used to produce libraries of potential variants of the polypeptides of the invention from a degenerate oligonucleotide sequence. Methods for synthesizing degenerate oligonucleotides are known in the art (see, e.g., Narang (1983) Tetrahedron 39:3; Itakura et al.
- libraries of fragments of the coding sequence of a polypeptide of the invention can be used to generate a variegated population of polypeptides for screening and subsequent selection of variants.
- a library of coding sequence fragments can be generated by treating a double stranded PCR fragment of the coding sequence of interest with a nuclease under conditions wherein nicking occurs only about once per molecule, denaturing the double stranded DNA, renaturing the DNA to form double stranded DNA which can include sense/antisense pairs from different nicked products, removing single stranded portions from reformed duplexes by treatment with S 1 nuclease, and ligating the resulting fragment library into an expression vector.
- an expression library can be derived which encodes N-terminal and internal fragments of various sizes of the protein of interest.
- REM Recursive ensemble mutagenesis
- An isolated polypeptide of the invention, or a fragment thereof, can be used as an immunogen to generate antibodies using standard techniques for polyclonal and monoclonal antibody preparation.
- the full-length polypeptide or protein can be used or, alternatively, the invention provides antigenic peptide fragments for use as immunogens.
- the antigenic peptide of a protein of the invention comprises at least 8 (preferably 10, 15, 20, or 30) amino acid residues of the amino acid sequence of SEQ ED NO:3, 15, 20, or 23, and encompasses an epitope of the protein such that an antibody raised against the peptide forms a specific immune complex with the protein.
- Preferred epitopes encompassed by the antigenic peptide are regions that are located on the surface of the protein, e.g., hydrophilic regions.
- Figures 2 and 7 are hydropathy plots of the proteins of the invention. These plots or similar analyses can be used to identify hydrophilic regions.
- An immunogen typically is used to prepare antibodies by immunizing a suitable subject, (e.g., rabbit, goat, mouse or other mammal).
- a suitable subject e.g., rabbit, goat, mouse or other mammal.
- An appropriate immunogenic preparation can contain, for example, recombinantly expressed or chemically synthesized polypeptide.
- the preparation can further include an adjuvant, such as Freund's complete or incomplete adjuvant, or similar immunostimulatory agent.
- antibody refers to immunoglobulin molecules and immunologically active portions of immunoglobulin molecules, i.e., molecules that contain an antigen binding site which specifically binds an antigen, such as a polypeptide of the invention, e.g., an epitope of a polypeptide of the invention.
- a molecule which specifically binds to a given polypeptide of the invention is a molecule which binds the polypeptide, but does not substantially bind other molecules in a sample, e.g., a biological sample, which naturally contains the polypeptide.
- immunologically active portions of immunoglobulin molecules include F(ab) and F(ab')2 fragments which can be generated by treating the antibody with an enzyme such as pepsin.
- the invention provides polyclonal and monoclonal antibodies.
- the term "monoclonal antibody” or “monoclonal antibody composition”, as used herein, refers to a population of antibody molecules that contain only one species of an antigen binding site capable of immunoreacting with a particular epitope.
- Polyclonal antibodies can be prepared as described above by immunizing a suitable subject with a polypeptide of the invention as an immunogen.
- Preferred polyclonal antibody compositions are ones that have been selected for antibodies directed against a polypeptide or polypeptides of the invention.
- Particularly preferred polyclonal antibody preparations are ones that contain only antibodies directed against a polypeptide or polypeptides of the invention.
- Particularly preferred immunogen compositions are those that contain no other human proteins such as, for example, immunogen compositions made using a non-human host cell for recombinant expression of a polypeptide of the invention.
- the only human epitope or epitopes recognized by the resulting antibody compositions raised against this immunogen will be present as part of a polypeptide or polypeptides of the invention.
- the antibody titer in the immunized subject can be monitored over time by standard techniques, such as with an enzyme linked immunosorbent assay (ELISA) using immobilized polypeptide.
- ELISA enzyme linked immunosorbent assay
- the antibody molecules can be isolated from the mammal (e.g., from the blood) and further purified by well-known techniques, such as protein A chromatography to obtain the IgG fraction.
- antibodies specific for a protein or polypeptide of the invention can be selected for (e.g. , partially purified) or purified by, e.g., affinity chromatography.
- a recombinantly expressed and purified (or partially purified) protein of the invention is produced as described herein, and covalently or non-covalently coupled to a solid support such as, for example, a chromatography column.
- the column can then be used to affinity purify antibodies specific for the proteins of the invention from a sample containing antibodies directed against a large number of different epitopes, thereby generating a substantially purified antibody composition, i.e., one that is substantially free of contaminating antibodies.
- a substantially purified antibody composition is meant, in this context, that the antibody sample contains at most only 30% (by dry weight) of contaminating antibodies directed against epitopes other than those on the desired protein or polypeptide of the invention, and preferably at most 20%, yet more preferably at most 10%, and most preferably at most 5% (by dry weight) of the sample is contaminating antibodies.
- a purified antibody composition means that at least 99% of the antibodies in the composition are directed against the desired protein or polypeptide of the invention.
- antibody-producing cells can be obtained from the subject and used to prepare monoclonal antibodies by standard techniques, such as the hybridoma technique originally described by Kohler and Milstein (1975) Nature 256:495-497, the human B cell hybridoma technique (Kozbor et al. (1983) Immunol. Today 4:72), the EBN-hybridoma technique (Cole et al. (1985), Monoclonal Antibodies and Cancer Therapy, Alan R. Liss, Inc., pp. 77-96) or trioma techniques.
- standard techniques such as the hybridoma technique originally described by Kohler and Milstein (1975) Nature 256:495-497, the human B cell hybridoma technique (Kozbor et al. (1983) Immunol. Today 4:72), the EBN-hybridoma technique (Cole et al. (1985), Monoclonal Antibodies and Cancer Therapy, Alan R. Liss, Inc., pp. 77-96) or trioma techniques.
- Hybridoma cells producing a monoclonal antibody of the invention are detected by screening the hybridoma culture supernatants for antibodies that bind the polypeptide of interest, e.g., using a standard ELISA assay.
- a monoclonal antibody directed against a polypeptide of the invention can be identified and isolated by screening a recombinant combinatorial immunoglobulin library (e.g., an antibody phage display library) with the polypeptide of interest.
- Kits for generating and screening phage display libraries are commercially available (e.g., the Pharmacia Recombinant Phage Antibody System, Catalog No. 27-9400-01; and the Sfratagene SurfZAPTM Phage Display Kit, Catalog No. 240612).
- examples of methods and reagents particularly amenable for use in generating and screening antibody display library can be found in, for example, U.S. Patent No. 5,223,409; PCT Publication No.
- recombinant antibodies such as chimeric and humanized monoclonal antibodies, comprising both human and non-human portions, which can be made using standard recombinant DNA techniques, are within the scope of the invention.
- a chimeric antibody is a molecule in which different portions are derived from different animal species, such as those having a variable region derived from a murine mAb and a human immunoglobulin constant region. (See, e.g., Cabilly et al., U.S. Patent No. 4,816,567; and Boss et al., U.S. Patent No.
- Humanized antibodies are antibody molecules from non- human species having one or more complementarily determining regions (CDRs) from the non-human species and a framework region from a human immunoglobulin molecule.
- CDRs complementarily determining regions
- Such chimeric and humanized monoclonal antibodies can be produced by recombinant DNA techniques known in the art, for example using methods described in PCT Publication No. WO 87/02671; European Patent Application 184,187; European Patent Application 171,496; European Patent Application 173,494; PCT Publication No.
- the transgenic mice are immunized in the normal fashion with a selected antigen, e.g., all or a portion of a polypeptide of the invention.
- Monoclonal antibodies directed against the antigen can be obtained using conventional hybridoma technology.
- the human immunoglobulin transgenes harbored by the transgenic mice rearrange during B cell differentiation, and subsequently undergo class switching and somatic mutation.
- Completely human antibodies which recognize a selected epitope can be generated using a technique referred to as "guided selection.”
- a selected non-human monoclonal antibody e.g., a mouse antibody, is used to guide the selection of a completely human antibody recognizing the same epitope.
- An antibody directed against a polypeptide of the invention can be used to isolate the polypeptide by standard techniques, such as affinity chromatography or immunoprecipitation. Moreover, such an antibody can be used to detect the protein (e.g., in a cellular lysate or cell supernatant) in order to evaluate the abundance and pattern of expression of the polypeptide.
- the antibodies can also be used diagnostically to monitor protein levels in tissue as part of a clinical testing procedure, e.g., to, for example, determine the efficacy of a given treatment regimen. Detection can be facilitated by coupling the antibody to a detectable substance.
- detectable substances include various enzymes, prosthetic groups, fluorescent materials, luminescent materials, bioluminescent materials, and radioactive materials.
- suitable enzymes include horseradish peroxidase, alkaline phosphatase, beta-galactosidase, or acetylcholinesterase;
- suitable prosthetic group complexes include streptavidin/biotin and avidin/biotin;
- suitable fluorescent materials include umbelliferone, fluorescein, fluorescein isothiocyanate, rhodamine, dichlorotriazinylamine fluorescein, dansyl chloride or phycoerythrin;
- an example of a luminescent material includes luminol;
- bioluminescent materials include luciferase, luciferin, and aequorin, and
- suitable radioactive material include 125 L 131 L 35 S or 3R
- an antibody can be conjugated to a therapeutic moiety such as a cytotoxin, a therapeutic agent or a radioactive metal ion.
- a cytotoxin or cytotoxic agent includes any agent that is detrimental to cells. Examples include taxol, cytochalasin B, gramicidin D, ethidium bromide, emetine, mitomycin, etoposide, tenoposide, vincristine, vinblastine, colchicin, doxorubicin, daunorubicin, dihydroxy anthracin dione, mitoxantrone, mithramycin, actinomycin D, 1-dehydrotestosterone, glucocorticoids, procaine, tetracaine, lidocaine, propranolol, and puromycin and analogs or homologs thereof.
- Therapeutic agents include, but are not limited to, antimetabolites (e.g., methotrexate, 6-mercaptopurine, 6-thioguanine, cytarabine, 5-fluorouracil decarbazine), alkylating agents (e.g., mechlorethamine, thioepa chlorambucil, melphalan, carmustine (BSNU) and lomustine (CCNU), cyclothosphamide, busulfan, dibromomannitol, streptozotocin, mitomycin C, and cis-dichlorodiamine platinum (II) (DDP) cisplatin), anthracyclines (e.g., antimetabolites (e.g., methotrexate, 6-mercaptopurine, 6-thioguanine, cytarabine, 5-fluorouracil decarbazine), alkylating agents (e.g., mechlorethamine, thioepa chloramb
- daunorubicin (formerly daunomycin) and doxorubicin
- antibiotics e.g., dactinomycin (formerly actinomycin), bleomycin, mithramycin, and anthramycin (AMC)
- anti-mitotic agents e.g., vincristine and vinblastine
- the drug moiety is not to be construed as limited to classical chemical therapeutic agents.
- the drug moiety may be a protein or polypeptide possessing a desired biological activity.
- proteins may include, for example, a toxin such as abrin, ricin A, pseudomonas exotoxin, or diphtheria toxin; a protein such as tumor necrosis factor, .alpha.
- -interferon .beta.-interferon, nerve growth factor, platelet derived growth factor, tissue plasminogen activator; or, biological response modifiers such as, for example, lymphokines, interleukin- 1 ("IL-1”), interleukin-2 (“IL-2”), interleukin-6 (“LL-6"), granulocyte macrophase colony stimulating factor (“GM-CSF”), granulocyte colony stimulating factor (“G-CSF”), or other growth factors.
- IL-1 interleukin- 1
- IL-2 interleukin-2
- LL-6 interleukin-6
- GM-CSF granulocyte macrophase colony stimulating factor
- G-CSF granulocyte colony stimulating factor
- an antibody can be conjugated to a second antibody to form an antibody heteroconjugate as described by Segal in U.S. Patent No. 4,676,980.
- the invention provides substantially purified antibodies or fragment thereof, and non-human antibodies or fragments thereof, which antibodies or fragments specifically bind to a polypeptide comprising an amino acid sequence selected from the group consisting of: the amino acid sequence of any one of SEQ ED NOs:3, 15, 20, 23, an amino acid sequence encoded by the HtrA-2 cDNA of a clone deposited as ATCC Accession No. 98899, or an amino acid sequence encoded by the TANGO 219 cDNA of a clone deposited as ATCC Accession No.
- the substantially purified antibodies of the invention, or fragments thereof can be human, non-human, chimeric and/or humanized antibodies.
- the invention provides non-human antibodies or fragments thereof, which antibodies or fragments specifically bind to a polypeptide comprising an amino acid sequence selected from the group consisting of: the amino acid sequence of any one of SEQ ED NOs:3, 15, 20, or 23, an amino acid sequence encoded by the HtrA-2 cDNA of a clone deposited as ATCC Accession No. 98899, or an amino acid sequence encoded by the TANGO 219 cDNA of a clone deposited as ATCC Accession No.
- non-human antibodies can be goat, mouse, sheep, horse, chicken, rabbit, or rat antibodies.
- non-human antibodies of the invention can be chimeric and/or humanized antibodies.
- the non- human antibodies of the invention can be polyclonal antibodies or monoclonal antibodies.
- the invention provides monoclonal antibodies or fragments thereof, which antibodies or fragments specifically bind to a polypeptide comprising an amino acid sequence selected from the group consisting of: the amino acid sequence of any one of SEQ ED Nos:3, 15, 20, or 23, an amino acid sequence encoded by the HtrA-2 cDNA of a clone deposited as ATCC Accession No. 98899, or an amino acid sequence encoded by the TANGO 219 cDNA of a clone deposited as ATCC Accession No.
- the monoclonal antibodies can be human, humanized, chimeric and/or non-human antibodies.
- any of the antibodies of the invention can be conjugated to a therapeutic moiety or to a detectable substance.
- detectable substances that can be conjugated to the antibodies of the invention are an enzyme, a prosthetic group, a fluorescent material, a luminescent material, a bioluminescent material, and a radioactive material.
- the invention also provides a kit containing an antibody of the invention conjugated to a detectable substance, and instructions for use.
- Still another aspect of the invention is a pharmaceutical composition comprising an antibody of the invention and a pharmaceutically acceptable carrier.
- the pharmaceutical composition contains an antibody of the invention, a therapeutic moiety, and a pharmaceutically acceptable carrier.
- Still another aspect of the invention is a method of making an antibody that specifically recognizes HtrA-2 and TANGO 219, the method comprising immunizing a mammal with a polypeptide.
- the polypeptide used as an immungen comprises an amino acid sequence selected from the group consisting of: the amino acid sequence of any one of SEQ ED NO:3, 15, 20, or 23, an amino acid sequence encoded by the HtrA-2 cDNA of a clone deposited as ATCC accession No. 98899, or an amino acid sequence encoded by the TANGO 219 cDNA of a clone deposited as ATCC accession No.
- a sample is collected from the mammal that contains an antibody that specifically recognizes GPVI.
- the polypeptide is recombinantly produced using a non-human host cell.
- the antibodies can be further purified from the sample using techniques well known to those of skill in the art.
- the method can further comprise producing a monoclonal antibody-producing cell from the cells of the mammal.
- antibodies are collected from the antibody- producing cell.
- vectors preferably expression vectors, containing a nucleic acid encoding a polypeptide of the invention (or a portion thereof).
- vector refers to a nucleic acid molecule capable of transporting another nucleic acid to which it has been linked.
- plasmid refers to a circular double stranded DNA loop into which additional DNA segments can be ligated.
- viral vector Another type of vector is a viral vector, wherein additional DNA segments can be ligated into the viral genome.
- Certain vectors are capable of autonomous replication in a host cell into which they are introduced (e.g., bacterial vectors having a bacterial origin of replication and episomal mammalian vectors).
- vectors e.g., non-episomal mammalian vectors
- expression vectors are capable of directing the expression of genes to which they are operably linked.
- expression vectors of utility in recombinant DNA techniques are often in the form of plasmids (vectors).
- the invention is intended to include such other forms of expression vectors, such as viral vectors (e.g., replication defective retroviruses, adenoviruses and adenoassociated viruses), which serve equivalent functions.
- the recombinant expression vectors of the invention comprise a nucleic acid of the invention in a form suitable for expression of the nucleic acid in a host cell.
- the recombinant expression vectors include one or more regulatory sequences, selected on the basis of the host cells to be used for expression, which is operably linked to the nucleic acid sequence to be expressed.
- "operably linked" is intended to mean that the nucleotide sequence of interest is linked to the regulatory sequence(s) in a manner which allows for expression of the nucleotide sequence (e.g., in an in vitro transcription translation system or in a host cell when the vector is introduced into the host cell).
- regulatory sequence is intended to include promoters, enhancers and other expression control elements (e.g., polyadenylation signals). Such regulatory sequences are described, for example, in Goeddel, Gene Expression Technology: Methods in Enzymology 185, Academic Press, San Diego, CA (1990). Regulatory sequences include those which direct constitutive expression of a nucleotide sequence in many types of host cell and those which direct expression of the nucleotide sequence only in certain host cells (e.g., tissue-specific regulatory sequences). It will be appreciated by those skilled in the art that the design of the expression vector can depend on such factors as the choice of the host cell to be transformed, the level of expression of protein desired, etc.
- the expression vectors of the invention can be introduced into host cells to thereby produce proteins or peptides, including fusion proteins or peptides, encoded by nucleic acids as described herein.
- the recombinant expression vectors of the invention can be designed for expression of a polypeptide of the invention in prokaryotic (e.g., E. coli) or eukaryotic cells (e.g., insect cells (using baculovirus expression vectors), yeast cells or mammalian cells). Suitable host cells are discussed further in Goeddel, supra.
- the recombinant expression vector can be transcribed and translated in vitro, for example using T7 promoter regulatory sequences and T7 polymerase.
- Fusion vectors add a number of amino acids to a protein encoded therein, usually to the amino terminus of the recombinant protein.
- Such fusion vectors typically serve three pu ⁇ oses: 1) to increase expression of recombinant protein; 2) to increase the solubility of the recombinant protein; and 3) to aid in the purification of the recombinant protein by acting as a ligand in affinity purification.
- a proteolytic cleavage site is introduced at the junction of the fusion moiety and the recombinant protein to enable separation of the recombinant protein from the fusion moiety subsequent to purification of the fusion protein.
- enzymes, and their cognate recognition sequences include Factor Xa, thrombin and enterokinase.
- Typical fusion expression vectors include pGEX (Pharmacia Biotech Inc; Smith and Johnson (1988) Gene 67:31-40), pMAL (New England Biolabs, Beverly, MA) and pRIT5 (Pharmacia, Piscataway, NJ) which fuse glutathione S-transferase (GST), maltose E binding protein, or protein A, respectively, to the target recombinant protein.
- GST glutathione S-transferase
- maltose E binding protein or protein A, respectively, to the target recombinant protein.
- Suitable inducible non-fusion E. coli expression vectors include pTrc (Amann et al., (1988) Gene 69:301-315) and pET l id (Studier et al., Gene Expression Technology: Methods in Enzymology 185, Academic Press, San Diego, California (1990) 60-89).
- Target gene expression from the pTrc vector relies on host RNA polymerase transcription from a hybrid t ⁇ -lac fusion promoter.
- Target gene expression from the pET l id vector relies on transcription from a T7 gnlO-lac fusion promoter mediated by a coexpressed viral RNA polymerase (T7 gnl). This viral polymerase is supplied by host strains BL21(DE3) or HMS174(DE3) from a resident ⁇ prophage harboring a T7 gnl gene under the transcriptional control of the lacUV 5 promoter.
- nucleic acid sequences of the invention can be carried out by standard DNA synthesis techniques.
- the expression vector is a yeast expression vector.
- yeast expression vectors for expression in yeast S. cerivisae include pYepSecl (Baldari et al. (1987) EMBOJ. 6:229-234), pMFa (Kurjan and Herskowitz, (1982) Cell 30:933-943),
- the expression vector is a baculovirus expression vector.
- Baculovirus vectors available for expression of proteins in cultured insect cells e.g., Sf 9
- a nucleic acid of the invention is expressed in mammalian cells using a mammalian expression vector.
- mammalian expression vectors include pCDM8 (Seed (1987) Nature 329:840) and pMT2PC
- the expression vector's control functions are often provided by viral regulatory elements.
- promoters are derived from polyoma, Adenovirus 2, cytomegalovirus and Simian Virus 40.
- suitable expression systems for both prokaryotic and eukaryotic cells see chapters 16 and 17 of Sambrook et al., supra.
- the recombinant mammalian expression vector is capable of directing expression of the nucleic acid preferentially in a particular cell type (e.g., tissue-specific regulatory elements are used to express the nucleic acid).
- tissue-specific regulatory elements are known in the art.
- suitable tissue-friendly specific promoters include the albumin promoter (liver-specific; Pinkert et al. (1987) Genes Dev. 1:268-277), lymphoid-specific promoters (Calame and Eaton (1988) Adv. Immunol 43:235-275), in particular promoters of T cell receptors (Winoto and Baltimore (1989) EMBOJ.
- promoters are also encompassed, for example the murine hox promoters (Kessel and Gruss (1990) Science 249:374-379) and the beta-fetoprotein promoter (Campes and Tilghman (1989) Genes Dev. 3:537-546).
- the invention further provides a recombinant expression vector comprising a DNA molecule of the invention cloned into the expression vector in an antisense orientation. That is, the DNA molecule is operably linked to a regulatory sequence in a manner which allows for expression (by transcription of the DNA molecule) of an RNA molecule which is antisense to the mRNA encoding a polypeptide of the invention.
- Regulatory sequences operably linked to a nucleic acid cloned in the antisense orientation can be chosen which direct the continuous expression of the antisense RNA molecule in a variety of cell types, for instance viral promoters and/or enhancers, or regulatory sequences can be chosen which direct constitutive, tissue specific or cell type specific expression of antisense RNA.
- the antisense expression vector can be in the form of a recombinant plasmid, phagemid or attenuated virus in which antisense nucleic acids are produced under the control of a high efficiency regulatory region, the activity of which can be determined by the cell type into which the vector is introduced.
- host cell and "recombinant host cell” are used interchangeably herein. It is understood that such terms refer not only to the particular subject cell but to the progeny or potential progeny of such a cell. Because certain modifications may occur in succeeding generations due to either mutation or environmental influences, such progeny may not, in fact, be identical to the parent cell, but are still included within the scope of the term as used herein.
- a host cell can be any prokaryotic (e.g., E. coli) or eukaryotic cell (e.g., insect cells, yeast or mammalian cells).
- prokaryotic e.g., E. coli
- eukaryotic cell e.g., insect cells, yeast or mammalian cells.
- Vector DNA can be introduced into prokaryotic or eukaryotic cells via conventional transformation or transfection techniques.
- transformation and “transfection” are intended to refer to a variety of art-recognized techniques for introducing foreign nucleic acid into a host cell, including calcium phosphate or calcium chloride co-precipitation, DEAE-dextran-mediated transfection, lipofection, or electroporation. Suitable methods for transforming or transfecting host cells can be found in Sambrook, et al. (supra), and other laboratory manuals.
- a gene that encodes a selectable marker (e.g., for resistance to antibiotics) is generally introduced into the host cells along with the gene of interest.
- selectable markers include those which confer resistance to drugs, such as G418, hygromycin and methotrexate.
- Cells stably transfected with the introduced nucleic acid can be identified by drug selection (e.g., cells that have inco ⁇ orated the selectable marker gene will survive, while the other cells die).
- an endogenous nucleic acid within a cell, cell line or microorganism may be modified by inserting a DNA regulatory element heterologous to the endogenous gene of interest into the genome of a cell, stable cell line or cloned microorganism such that the inserted regulatory element is operatively linked with the endogenous gene (e.g., HtrA-2 and TANGO 219) and controls, modulates or activates the endogenous gene.
- a DNA regulatory element heterologous to the endogenous gene of interest into the genome of a cell, stable cell line or cloned microorganism such that the inserted regulatory element is operatively linked with the endogenous gene (e.g., HtrA-2 and TANGO 219) and controls, modulates or activates the endogenous gene.
- endogenous HtrA-2 and TANGO 219 which are normally “transcriptionally silent", i.e., HtrA-2 and TANGO 219 genes which are normally not expressed, or are expressed only at very low levels in a cell line or microorganism, may be activated by inserting a regulatory element which is capable of promoting the expression of a normally expressed gene product in that cell line or microorganism.
- transcriptionally silent, endogenous HtrA-2 and TANGO 219 genes may be activated by insertion of a promiscuous regulatory element that works across cell types.
- a heterologous regulatory element may be inserted into a stable cell line or cloned microorganism, such that it is operatively linked with and activates expression of endogenous HtrA-2 and TANGO 219 genes, using techniques, such as targeted homologous recombination, which are well known to those of skill in the art, and described e.g., in Chappel, U.S. Patent No. 5,272,071; PCT publication No. WO 91/06667, published May 16, 1991.
- a host cell of the invention such as a prokaryotic or eukaryotic host cell in culture, can be used to produce a polypeptide of the invention. Accordingly, the invention further provides methods for producing a polypeptide of the invention using the host cells of the invention. In one embodiment, the method comprises culturing the host cell of invention (into which a recombinant expression vector encoding a polypeptide of the invention has been introduced) in a suitable medium such that the polypeptide is produced. In another embodiment, the method further comprises isolating the polypeptide from the medium or the host cell.
- the host cells of the invention can also be used to produce nonhuman transgenic animals.
- a host cell of the invention is a fertilized oocyte or an embryonic stem cell into which a sequence encoding a polypeptide of the invention has been introduced.
- Such host cells can then be used to create non-human transgenic animals in which exogenous sequences encoding a polypeptide of the invention have been introduced into their genome or homologous recombinant animals in which endogenous encoding a polypeptide of the invention sequences have been altered.
- Such animals are useful for studying the function and/or activity of the polypeptide and for identifying and/or evaluating modulators of polypeptide activity.
- a "transgenic animal” is a non-human animal, preferably a mammal, more preferably a rodent such as a rat or mouse, in which one or more of the cells of the animal includes a transgene.
- Other examples of transgenic animals include non-human primates, sheep, dogs, cows, goats, chickens, amphibians, etc.
- a transgene is exogenous DNA which is integrated into the genome of a cell from which a transgenic animal develops and which remains in the genome of the mature animal, thereby directing the expression of an encoded gene product in one or more cell types or tissues of the transgenic animal.
- an "homologous recombinant animal” is a non-human animal, preferably a mammal, more preferably a mouse, in which an endogenous gene has been altered by homologous recombination between the endogenous gene and an exogenous DNA molecule introduced into a cell of the animal, e.g., an embryonic cell of the animal, prior to development of the animal.
- a transgenic animal of the invention can be created by introducing nucleic acid encoding a polypeptide of the invention (or a homologue thereof) into the male pronuclei of a fertilized oocyte, e.g., by microinjection, retroviral infection, and allowing the oocyte to develop in a pseudopregnant female foster animal.
- Intronic sequences and polyadenylation signals can also be included in the transgene to increase the efficiency of expression of the transgene.
- a tissue-specific regulatory sequence(s) can be operably linked to the transgene to direct expression of the polypeptide of the invention to particular cells.
- transgenic founder animal can be identified based upon the presence of the transgene in its genome and/or expression of mRNA encoding the transgene in tissues or cells of the animals. A transgenic founder animal can then be used to breed additional animals carrying the transgene. Moreover, transgenic animals carrying the transgene can further be bred to other transgenic animals carrying other transgenes.
- a vector which contains at least a portion of a gene encoding a polypeptide of the invention into which a deletion, addition or substitution has been introduced to thereby alter, e.g., functionally disrupt, the gene.
- the vector is designed such that, upon homologous recombination, the endogenous gene is functionally disrupted (i.e., no longer encodes a functional protein; also referred to as a "knock out" vector).
- the vector can be designed such that, upon homologous recombination, the endogenous gene is mutated or otherwise altered but still encodes functional protein (e.g., the upstream regulatory region can be altered to thereby alter the expression of the endogenous protein).
- the altered portion of the gene is flanked at its 5' and 3' ends by additional nucleic acid of the gene to allow for homologous recombination to occur between the exogenous gene carried by the vector and an endogenous gene in an embryonic stem cell.
- the additional flanking nucleic acid sequences are of sufficient length for successful homologous recombination with the endogenous gene.
- flanking DNA both at the 5' and 3' ends
- flanking DNA both at the 5' and 3' ends
- the vector is introduced into an embryonic stem cell line (e.g., by electroporation) and cells in which the introduced gene has homologously recombined with the endogenous gene are selected (see, e.g., Li et al. (1992) Cell 69:915).
- the selected cells are then injected into a blastocyst of an animal (e.g., a mouse) to form aggregation chimeras (see, e.g., Bradley in Teratocarcinomas and Embryonic Stem Cells: A Practical Approach, Robertson, ed. (LRL, Oxford, 1987) pp. 113-152).
- a chimeric embryo can then be implanted into a suitable pseudopregnant female foster animal and the embryo brought to term.
- Progeny harboring the homologously recombined DNA in their germ cells can be used to breed animals in which all cells of the animal contain the homologously recombined DNA by germline transmission of the transgene.
- transgenic non-human animals can be produced which contain selected systems which allow for regulated expression of the transgene.
- a system is the cre/loxP recombinase system of bacteriophage PI .
- cre/loxP recombinase system of bacteriophage PI .
- a recombinase system is the FLP recombinase system of Saccharomyces cerevisiae (O'Gorman et al. (1991) Science 251 :1351-1355.
- mice containing transgenes encoding both the Cre recombinase and a selected protein are required.
- Such animals can be provided through the construction of "double" transgenic animals, e.g., by mating two transgenic animals, one containing a transgene encoding a selected protein and the other containing a transgene encoding a recombinase.
- Clones of the non-human transgenic animals described herein can also be produced according to the methods described in Wilmut et al. (1997) Nature 385:810- 813 and PCT Publication NOS. WO 97/07668 and WO 97/07669.
- compositions suitable for administration can be inco ⁇ orated into pharmaceutical compositions suitable for administration.
- Such compositions typically comprise the nucleic acid molecule, protein, or antibody and a pharmaceutically acceptable carrier.
- pharmaceutically acceptable carrier is intended to include any and all solvents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and abso ⁇ tion delaying agents, and the like, compatible with pharmaceutical administration.
- the use of such media and agents for pharmaceutically active substances is well known in the art. Except insofar as any conventional media or agent is incompatible with the active compound, use thereof in the compositions is contemplated. Supplementary active compounds can also be inco ⁇ orated into the compositions.
- the invention includes methods for preparing pharmaceutical compositions for modulating the expression or activity of a polypeptide or nucleic acid of the invention. Such methods comprise formulating a pharmaceutically acceptable carrier with an agent which modulates expression or activity of a polypeptide or nucleic acid of the invention. Such compositions can further include additional active agents. Thus, the invention further includes methods for preparing a pharmaceutical composition by formulating a pharmaceutically acceptable carrier with an agent which modulates expression or activity of a polypeptide or nucleic acid of the invention and one or more additional active compounds.
- a pharmaceutical composition of the invention is formulated to be compatible with its intended route of administration.
- routes of administration include parenteral, e.g., intravenous, intradermal, subcutaneous, oral (e.g., inhalation), transdermal (topical), transmucosal, and rectal administration.
- Solutions or suspensions used for parenteral, intradermal, or subcutaneous application can include the following components: a sterile diluent such as water for injection, saline solution, fixed oils, polyethylene glycols, glycerine, propylene glycol or other synthetic solvents; antibacterial agents such as benzyl alcohol or methyl parabens; antioxidants such as ascorbic acid or sodium bisulfite; chelating agents such as ethylenediaminetetraacetic acid; buffers such as acetates, citrates or phosphates and agents for the adjustment of tonicity such as sodium chloride or dextrose. pH can be adjusted with acids or bases, such as hydrochloric acid or sodium hydroxide.
- the parenteral preparation can be enclosed in ampoules, disposable syringes or multiple dose vials made of glass or plastic.
- compositions suitable for injectable use include sterile aqueous solutions (where water soluble) or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersions.
- suitable carriers include physiological saline, bacteriostatic water, Cremophor EL? (BASF; Parsippany, NJ) or phosphate buffered saline (PBS).
- the composition must be sterile and should be fluid to the extent that easy syringability exists. It must be stable under the conditions of manufacture and storage and must be preserved against the contaminating action of microorganisms such as bacteria and fungi.
- the carrier can be a solvent or dispersion medium containing, for example, water, ethanol, polyol (for example, glycerol, propylene glycol, and liquid polyetheylene glycol, and the like), and suitable mixtures thereof.
- the proper fluidity can be maintained, for example, by the use of a coating such as lecithin, by the maintenance of the required particle size in the case of dispersion and by the use of surfactants.
- Prevention of the action of microorganisms can be achieved by various antibacterial and antifungal agents, for example, parabens, chlorobutanol, phenol, ascorbic acid, thimerosal, and the like.
- isotonic agents for example, sugars, polyalcohols such as mannitol, sorbitol, sodium chloride in the composition.
- Prolonged abso ⁇ tion of the injectable compositions can be brought about by including in the composition an agent which delays abso ⁇ tion, for example, aluminum monostearate and gelatin.
- Sterile injectable solutions can be prepared by inco ⁇ orating the active compound (e.g., a polypeptide or antibody) in the required amount in an appropriate solvent with one or a combination of ingredients enumerated above, as required, followed by filtered sterilization.
- the active compound e.g., a polypeptide or antibody
- dispersions are prepared by inco ⁇ orating the active compound into a sterile vehicle which contains a basic dispersion medium and the required other ingredients from those enumerated above.
- the preferred methods of preparation are vacuum drying and freeze-drying which yields a powder of the active ingredient plus any additional desired ingredient from a previously sterile-filtered solution thereof.
- Oral compositions generally include an inert diluent or an edible carrier. They can be enclosed in gelatin capsules or compressed into tablets. For the pu ⁇ ose of oral therapeutic administration, the active compound can be inco ⁇ orated with excipients and used in the form of tablets, troches, or capsules. Oral compositions can also be prepared using a fluid carrier for use as a mouthwash, wherein the compound in the fluid carrier is applied orally and swished and expectorated or swallowed.
- compositions can contain any of the following ingredients, or compounds of a similar nature: a binder such as microcrystalline cellulose, gum tragacanth or gelatin; an excipient such as starch or lactose, a disintegrating agent such as alginic acid, Primogel, or corn starch; a lubricant such as magnesium stearate or Sterotes; a glidant such as colloidal silicon dioxide; a sweetening agent such as sucrose or saccharin; or a flavoring agent such as peppermint, methyl salicylate, or orange flavoring.
- a binder such as microcrystalline cellulose, gum tragacanth or gelatin
- an excipient such as starch or lactose, a disintegrating agent such as alginic acid, Primogel, or corn starch
- a lubricant such as magnesium stearate or Sterotes
- a glidant such as colloidal silicon dioxide
- a sweetening agent such as sucrose or saccharin
- the compounds are delivered in the form of an aerosol spray from a pressurized container or dispenser which contains a suitable propellant, e.g., a gas such as carbon dioxide, or a nebulizer.
- a suitable propellant e.g., a gas such as carbon dioxide, or a nebulizer.
- Systemic administration can also be by transmucosal or transdermal means.
- penetrants appropriate to the barrier to be permeated are used in the formulation.
- penetrants are generally known in the art, and include, for example, for transmucosal administration, detergents, bile salts, and fusidic acid derivatives.
- Transmucosal administration can be accomplished through the use of nasal sprays or suppositories.
- the active compounds are formulated into ointments, salves, gels, or creams as generally known in the art.
- the compounds can also be prepared in the form of suppositories (e.g., with conventional suppository bases such as cocoa butter and other glycerides) or retention enemas for rectal delivery.
- suppositories e.g., with conventional suppository bases such as cocoa butter and other glycerides
- retention enemas for rectal delivery.
- the active compounds are prepared with carriers that will protect the compound against rapid elimination from the body, such as a controlled release formulation, including implants and microencapsulated delivery systems.
- a controlled release formulation including implants and microencapsulated delivery systems.
- Biodegradable, biocompatible polymers can be used, such as ethylene vinyl acetate, polyanhydrides, polyglycolic acid, collagen, polyorthoesters, and polylactic acid. Methods for preparation of such formulations will be apparent to those skilled in the art.
- the materials can also be obtained commercially from Alza Co ⁇ oration and Nova Pharmaceuticals, Inc.
- Liposomal suspensions (including liposomes targeted to infected cells with monoclonal antibodies to viral antigens) can also be used as pharmaceutically acceptable carriers. These can be prepared according to methods known to those skilled in the art, for example, as described in U.S. Patent No. 4,522,811.
- Dosage unit form refers to physically discrete units suited as unitary dosages for the subject to be treated; each unit containing a predetermined quantity of active compound calculated to produce the desired therapeutic effect in association with the required pharmaceutical carrier.
- the specification for the dosage unit forms of the invention are dictated by and directly dependent on the unique characteristics of the active compound and the particular therapeutic effect to be achieved, and the limitations inherent in the art of compounding such an active compound for the treatment of individuals.
- the preferred dosage is 0.1 mg/kg to 100 mg/kg of body weight (generally 10 mg/kg to 20 mg/kg). If the antibody is to act in the brain, a dosage of 50 mg/kg to 100 mg/kg is usually appropriate. Generally, partially human antibodies and fully human antibodies have a longer half-life within the human body than other antibodies. Accordingly, lower dosages and less frequent administration is often possible. Modifications such as lipidation can be used to stabilize antibodies and to enhance uptake and tissue penetration (e.g., into the brain). A method for lipidation of antibodies is described by Cruikshank et al. ((1997) J. Acquired Immune Deficiency Syndromes and Human Retrovirology 14:193).
- nucleic acid molecules of the invention can be inserted into vectors and used
- Gene therapy vectors can be delivered to a subject by, for example, intravenous injection, local administration (U.S. Patent 5,328,470) or by stereo tactic injection (see, e.g., Chen et al. (1994) Proc. Natl. Acad. Sci. USA 91:3054- 3057).
- the pharmaceutical preparation of the gene therapy vector can include the gene therapy vector in an acceptable diluent, or can comprise a slow release matrix in which
- the gene delivery vehicle is imbedded.
- the complete gene delivery vector can be produced intact from recombinant cells, e.g.,retroviral vectors
- the pharmaceutical preparation can include one or more cells which produce the gene delivery system.
- compositions can be included in a container, pack, or
- nucleic acid molecules, proteins, protein homologues, and antibodies described herein can be used in one or more of the following methods: a) screening
- HtrA-2 polypeptides of the invention can to used to, for example, a) detection assays (e.g., chromosomal mapping, tissue typing, forensic biology); c) predictive medicine (e.g., diagnostic assays, prognostic assays, monitoring clinical trials, and pharmacogenomics); and d) methods of treatment (e.g., therapeutic and prophylactic).
- detection assays e.g., chromosomal mapping, tissue typing, forensic biology
- predictive medicine e.g., diagnostic assays, prognostic assays, monitoring clinical trials, and pharmacogenomics
- methods of treatment e.g., therapeutic and prophylactic.
- methods of treatment e.g., therapeutic and prophylactic.
- the HtrA-2 polypeptides of the invention can to used to, for example, a) detection assays (e.g., chromosomal mapping, tissue typing, forensic biology); c) predictive medicine (e.g.,
- the isolated nucleic acid molecules of the invention can be used to express proteins (e.g., via a recombinant expression vector in a host cell in gene therapy applications), to detect mRNA (e.g., in a biological sample) or a genetic
- polypeptides of the invention can be used to screen drugs or compounds which modulate activity or expression of a polypeptide of the invention as well as to treat disorders characterized by insufficient or excessive production of a protein of the invention or production of a form of a protein of the invention which has decreased or aberrant activity compared to the wild type protein.
- the antibodies of the invention can be used to screen drugs or compounds which modulate activity or expression of a polypeptide of the invention as well as to treat disorders characterized by insufficient or excessive production of a protein of the invention or production of a form of a protein of the invention which has decreased or aberrant activity compared to the wild type protein.
- 35 can be used to detect and isolate a protein of the and modulate activity of a protein of the invention.
- This invention further pertains to novel agents identified by the above-described screening assays and uses thereof for treatments as described herein.
- the invention provides a method (also refe ⁇ ed to herein as a "screening assay") for identifying modulators, i.e., candidate or test compounds or agents (e.g., peptides, peptidomimetics, small molecules or other drugs) which bind to polypeptide of the invention or have a stimulatory or inhibitory effect on, for example, expression or activity of a polypeptide of the invention.
- modulators i.e., candidate or test compounds or agents (e.g., peptides, peptidomimetics, small molecules or other drugs) which bind to polypeptide of the invention or have a stimulatory or inhibitory effect on, for example, expression or activity of a polypeptide of the invention.
- the invention provides assays for screening candidate or test compounds which bind to or modulate the activity of the membrane-bound form of a polypeptide of the invention or biologically active portion thereof.
- the test compounds of the present invention can be obtained using any of the numerous approaches in combinatorial library methods known in the art, including: biological libraries; spatially addressable parallel solid phase or solution phase libraries; synthetic library methods requiring deconvolution; the "one-bead one-compound” library method; and synthetic library methods using affinity chromatography selection.
- the biological library approach is limited to peptide libraries, while the other four approaches are applicable to peptide, non-peptide oligomer or small molecule libraries of compounds (Lam (1997) Anticancer DrugDes. 12:145).
- an assay is a cell-based assay in which a cell which expresses a membrane-bound form of a polypeptide of the invention, or a biologically active portion thereof, on the cell surface is contacted with a test compound and the ability of the test compound to bind to the polypeptide determined.
- the cell for example, can be a yeast cell or a cell of mammalian origin.
- Determining the ability of the test compound to bind to the polypeptide can be accomplished, for example, by coupling the test compound with a radioisotope or enzymatic label such that binding of the test compound to the polypeptide or biologically active portion thereof can be determined by detecting the labeled compound in a complex.
- test compounds can be labeled with 125 I, 35 S, 14 C, or 3 H, either directly or indirectly, and the radioisotope detected by direct counting of radioemmission or by scintillation counting.
- test compounds can be enzymatically labeled with, for example, horseradish peroxidase, alkaline phosphatase, or luciferase, and the enzymatic label detected by determination of conversion of an appropriate substrate to product.
- the assay comprises contacting a cell which expresses a membrane-bound form of a polypeptide of the invention, or a biologically active portion thereof, on the cell surface with a known compound which binds the polypeptide to form an assay mixture, contacting the assay mixture with a test compound, and determining the ability of the test compound to interact with the polypeptide, wherein determining the ability of the test compound to interact with the polypeptide comprises determining the ability of the test compound to preferentially bind to the polypeptide or a biologically active portion thereof as compared to the known compound.
- an assay is a cell-based assay comprising contacting a cell expressing a membrane-bound form of a polypeptide of the invention, or a biologically active portion thereof, on the cell surface with a test compound and determining the ability of the test compound to modulate (e.g., stimulate or inhibit) the activity of the polypeptide or biologically active portion thereof. Determining the ability of the test compound to modulate the activity of the polypeptide or a biologically active portion thereof can be accomplished, for example, by determining the ability of the polypeptide protein to bind to or interact with a target molecule.
- a target molecule is a molecule with which a selected polypeptide (e.g., a polypeptide of the invention) binds or interacts with in nature, for example, a molecule on the surface of a cell which expresses the selected protein, a molecule on the surface of a second cell, a molecule in the extracellular milieu, a molecule associated with the internal surface of a cell membrane or a cytoplasmic molecule.
- a target molecule can be a polypeptide of the invention or some other polypeptide or protein.
- a target molecule can be a component of a signal transduction pathway which facilitates transduction of an extracellular signal (e.g., a signal generated by binding of a compound to a polypeptide of the invention) through the cell membrane and into the cell or a second intercellular protein which has catalytic activity or a protein which facilitates the association of downstream signaling molecules with a polypeptide of the invention. Determining the ability of a polypeptide of the invention to bind to or interact with a target molecule can be accomplished by determining the activity of the target molecule.
- an extracellular signal e.g., a signal generated by binding of a compound to a polypeptide of the invention
- the activity of the target molecule can be determined by detecting induction of a cellular second messenger of the target (e.g., intracellular Ca 2+ , diacylglycerol, EP3, etc.), detecting catalytic/enzymatic activity of the target on an appropriate substrate, detecting the induction of a reporter gene (e.g., a regulatory element that is responsive to a polypeptide of the invention operably linked to a nucleic acid encoding a detectable marker, e.g., luciferase), or detecting a cellular response, for example, cellular differentiation, or cell proliferation.
- a reporter gene e.g., a regulatory element that is responsive to a polypeptide of the invention operably linked to a nucleic acid encoding a detectable marker, e.g., luciferase
- a cellular response for example, cellular differentiation, or cell proliferation.
- an assay of the present invention is a cell-free assay comprising contacting a polypeptide of the invention or biologically active portion thereof with a test compound and determining the ability of the test compound to bind to the polypeptide or biologically active portion thereof. Binding of the test compound to the polypeptide can be determined either directly or indirectly as described above.
- the assay includes contacting the polypeptide of the invention or biologically active portion thereof with a known compound which binds the polypeptide to form an assay mixture, contacting the assay mixture with a test compound, and determining the ability of the test compound to interact with the polypeptide, wherein determining the ability of the test compound to interact with the polypeptide comprises determining the ability of the test compound to preferentially bind to the polypeptide or biologically active portion thereof as compared to the known compound.
- an assay is a cell-free assay comprising contacting a polypeptide of the invention or biologically active portion thereof with a test compound and determining the ability of the test compound to modulate (e.g., stimulate or inhibit) the activity of the polypeptide or biologically active portion thereof. Determining the ability of the test compound to modulate the activity of the polypeptide can be accomplished, for example, by determining the ability of the polypeptide to bind to a target molecule by one of the methods described above for determining direct binding. In an alternative embodiment, determining the ability of the test compound to modulate the activity of the polypeptide can be accomplished by determining the ability of the polypeptide of the invention to further modulate the target molecule. For example, the catalytic/enzymatic activity of the target molecule on an appropriate substrate can be determined as previously described.
- the cell-free assay comprises contacting a polypeptide of the invention or biologically active portion thereof with a known compound which binds the polypeptide to form an assay mixture, contacting the assay mixture with a test compound, and determining the ability of the test compound to interact with the polypeptide, wherein determining the ability of the test compound to interact with the polypeptide comprises determining the ability of the polypeptide to preferentially bind to or modulate the activity of a target molecule.
- the cell-free assays of the present invention are amenable to use of both a soluble form or the membrane-bound form of a polypeptide of the invention.
- non-ionic detergents such as n-octylglucoside, n-do
- binding of a test compound to the polypeptide, or interaction of the polypeptide with a target molecule in the presence and absence of a candidate compound can be accomplished in any vessel suitable for containing the reactants. Examples of such vessels include microtitre plates, test tubes, and micro-centrifuge tubes.
- a fusion protein can be provided which adds a domain that allows one or both of the proteins to be bound to a matrix.
- glutathione-S-transferase fusion proteins or glutathione-S- transferase fusion proteins can be adsorbed onto glutathione sepharose beads (Sigma Chemical; St. Louis, MO) or glutathione derivatized microtitre plates, which are then combined with the test compound or the test compound and either the non-adsorbed target protein or A polypeptide of the invention, and the mixture incubated under conditions conducive to complex formation (e.g., at physiological conditions for salt and pH). Following incubation, the beads or microtitre plate wells are washed to remove any unbound components and complex formation is measured either directly or indirectly, for example, as described above.
- glutathione sepharose beads Sigma Chemical; St. Louis, MO
- glutathione derivatized microtitre plates which are then combined with the test compound or the test compound and either the non-adsorbed target protein or A polypeptide of the invention, and the mixture incubated under conditions conducive to complex formation (e.
- the complexes can be dissociated from the matrix, and the level of binding or activity of the polypeptide of the invention can be determined using standard techniques.
- Other techniques for immobilizing proteins on matrices can also be used in the screening assays of the invention.
- either the polypeptide of the invention or its target molecule can be immobilized utilizing conjugation of biotin and streptavidin.
- Biotinylated polypeptide of the invention or target molecules can be prepared from biotin-NHS (N-hydroxy-succinimide) using techniques well known in the art (e.g., biotinylation kit, Pierce Chemicals; Rockford, JL), and immobilized in the wells of streptavidin-coated 96 well plates (Pierce Chemical).
- antibodies reactive with the polypeptide of the invention or target molecules but which do not interfere with binding of the polypeptide of the invention to its target molecule can be derivatized to the wells of the plate, and unbound target or polypeptide of the invention trapped in the wells by antibody conjugation.
- Methods for detecting such complexes include immunodetection of complexes using antibodies reactive with the polypeptide of the invention or target molecule, as well as enzyme-linked assays which rely on detecting an enzymatic activity associated with the polypeptide of the invention or target molecule.
- modulators of expression of a polypeptide of the invention are identified in a method in which a cell is contacted with a candidate compound and the expression of the selected mRNA or protein (i.e., the mRNA or protein corresponding to a polypeptide or nucleic acid of the invention) in the cell is determined.
- the level of expression of the selected mRNA or protein in the presence of the candidate compound is compared to the level of expression of the selected mRNA or protein in the absence of the candidate compound.
- the candidate compound can then be identified as a modulator of expression of the polypeptide of the invention based on this comparison.
- the candidate compound when expression of the selected mRNA or protein is greater (statistically significantly greater) in the presence of the candidate compound than in its absence, the candidate compound is identified as a stimulator of the selected mRNA or protein expression.
- the candidate compound when expression of the selected mRNA or protein is less (statistically significantly less) in the presence of the candidate compound than in its absence, the candidate compound is identified as an inhibitor of the selected mRNA or protein expression.
- the level of the selected mRNA or protein expression in the cells can be determined by methods described herein.
- a polypeptide of the inventions can be used as "bait proteins" in a two-hybrid assay or three hybrid assay (see, e.g., U.S. Patent No. 5,283,317; Zervos et al. (1993) Cell 11:113-131; Madura et al. (1993) J. Biol. Chem. 268:12046-12054; Bartel et al. (1993) Bio/Techniques 14:920-924; Iwabuchi et al. (1993) ° Oncogene 8:1693-1696; and PCT Publication No.
- binding proteins are also likely to be involved in the propagation of signals by the polypeptide of the inventions as, for example, upstream or downstream elements of a signaling pathway involving the 5 polypeptide of the invention.
- This invention further pertains to novel agents identified by the above-described screening assays and uses thereof for treatments as described herein.
- cDNA sequences identified herein can be used in numerous ways as polynucleotide reagents. For example, these sequences can be used to: (i) map their respective genes on a chromosome and, thus, locate gene regions associated with genetic disease; (ii) identify an individual from a minute biological sample (tissue typing); and 5 (iii) aid in forensic identification of a biological sample. These applications are described in the subsections below.
- Chromosome Mapping 0 Once the sequence (or a portion of the sequence) of a gene has been isolated, this sequence can be used to map the location of the gene on a chromosome. Accordingly, nucleic acid molecules described herein or fragments thereof, can be used to map the location of the corresponding genes on a chromosome. The mapping of the sequences to chromosomes is an important first step in correlating these sequences with genes 5 associated with disease. Briefly, genes can be mapped to chromosomes by preparing PCR primers (preferably 15-25 bp in length) from the sequence of a gene of the invention.
- PCR mapping of somatic cell hybrids is a rapid procedure for assigning a particular sequence to a particular chromosome. Three or more sequences can be assigned per day using a single thermal cycler. Using the nucleic acid sequences of the invention to design oligonucleotide primers, sublocalization can be achieved with panels of fragments from specific chromosomes. Other mapping strategies which can similarly be used to map a gene to its chromosome include in situ hybridization (described in Fan et al. (1990) Proc. Natl. Acad. Sci. USA 81:6113-11), pre-screening with labeled flow- sorted chromosomes (CITE), and pre-selection by hybridization to chromosome specific cDNA libraries.
- Fluorescence in situ hybridization of a DNA sequence to a metaphase chromosomal spread can further be used to provide a precise chromosomal location in one step.
- FISH Fluorescence in situ hybridization
- Reagents for chromosome mapping can be used individually to mark a single chromosome or a single site on that chromosome, or panels of reagents can be used for marking multiple sites and/or multiple chromosomes. Reagents corresponding to noncoding regions of the genes actually are preferred for mapping pu ⁇ oses. Coding sequences are more likely to be conserved within gene families, thus increasing the chance of cross hybridizations during chromosomal mapping.
- differences in the DNA sequences between individuals affected and unaffected with a disease associated with a gene of the invention can be determined. If a mutation is observed in some or all of the affected individuals but not in any unaffected individuals, then the mutation is likely to be the causative agent of the particular disease. Comparison of affected and unaffected individuals generally involves first looking for structural alterations in the chromosomes such as deletions or translocations that are visible from chromosome spreads or detectable using PCR based on that DNA sequence. Ultimately, complete sequencing of genes from several individuals can be performed to confirm the presence of a mutation and to distinguish mutations from polymo ⁇ hisms.
- the human gene for TANGO 219 was mapped on radiation hybrid panels to the long arm of chromosome 5, in the region qll-11. Flanking markers for this region are NEB916 and D5S492.
- the MANA2 mannosidase, type2
- APC APC
- the LGMD1 A limb girdle muscular dystrophy loci also maps to this region of the human chromosome. This region is syntenic to mouse chromosomes 11 and 18 .
- the Q quinky
- pdw proportional dwarf
- lyll lymphoblastomic leukemia
- Chr.l 1-fer protein kinase, testis specific
- Chr.l 8-mcc mutated in colorectal cancers
- pk plucked
- donl divergent of neuregulin 1
- the nucleic acid sequences of the present invention can also be used to identify individuals from minute biological samples.
- the United States military for example, is considering the use of restriction fragment length polymo ⁇ hism (RFLP) for identification of its personnel.
- RFLP restriction fragment length polymo ⁇ hism
- an individual's genomic DNA is digested with one or more restriction enzymes, and probed on a Southern blot to yield unique bands for identification.
- This method does not suffer from the current limitations of "Dog Tags" which can be lost, switched, or stolen, making positive identification difficult.
- the sequences of the present invention are useful as additional DNA markers for RFLP (described in U.S. Patent 5,272,057).
- sequences of the present invention can be used to provide an alternative technique which determines the actual base-by-base DNA sequence of selected portions of an individual's genome.
- the nucleic acid sequences described herein can be used to prepare two PCR primers from the 5' and 3' ends of the sequences. These primers can then be used to amplify an individual's DNA and subsequently sequence it. Panels of corresponding DNA sequences from individuals, prepared in this manner, can provide unique individual identifications, as each individual will have a unique set of such DNA sequences due to allelic differences.
- the sequences of the present invention can be used to obtain such identification sequences from individuals
- nucleic acid sequences of the invention uniquely represent portions of the human genome. Allelic variation occurs to some degree in the coding regions of these sequences, and to a greater degree in the noncoding regions. It is estimated that allelic variation between individual humans occurs with a frequency of about once per each 500 bases.
- Each of the sequences described herein can, to some degree, be used as a
- SEQ JD NO:l or 12 can comfortably provide positive individual identification with a panel of perhaps 10 to 1,000 primers which each yield a noncoding amplified sequence of
- a panel of reagents from the nucleic acid sequences described herein is used to generate a unique identification database for an individual, those same reagents can later 0 be used to identify tissue from that individual.
- positive identification of the individual, living or dead can be made from extremely small tissue samples.
- DNA-based identification techniques can also be used in forensic biology. Forensic biology is a scientific field employing genetic typing of biological evidence found at a crime scene as a means for positively identifying, for example, a pe ⁇ etrator of a crime. To make such an identification, PCR technology can be used to amplify DNA sequences taken from very small biological samples such as tissues, e.g., hair or skin, or
- the amplified sequence can then be compared to a standard, thereby allowing identification of the origin of the biological sample.
- sequences of the present invention can be used to provide polynucleotide , reagents, e.g., PCR primers, targeted to specific loci in the human genome, which can enhance the reliability of DNA-based forensic identifications by, for example, providing another "identification marker" (i.e. another DNA sequence that is unique to a particular individual).
- an "identification marker” i.e. another DNA sequence that is unique to a particular individual.
- actual base sequence information can be used for identification as an accurate alternative to patterns formed by restriction enzyme generated fragments.
- Sequences targeted to noncoding regions are particularly 5 appropriate for this use as greater numbers of polymo ⁇ hisms occur in the noncoding regions, making it easier to differentiate individuals using this technique.
- polynucleotide reagents include the nucleic acid sequences of the invention or portions thereof, e.g., fragments derived from noncoding regions having a length of at least 20 or 30 bases.
- nucleic acid sequences described herein can further be used to provide polynucleotide reagents, e.g., labeled or labelable probes which can be used in, for example, an in situ hybridization technique, to identify a specific tissue, e.g., brain tissue. This can be very useful in cases where a forensic pathologist is presented with a tissue of unknown origin. Panels of such probes can be used to identify tissue by species and/or
- the present invention also pertains to the field of predictive medicine in which diagnostic assays, prognostic assays, pharmacogenomics, and monitoring clinical trails
- one aspect of the present invention relates to diagnostic assays for determining expression of a polypeptide or nucleic acid of the invention and/or activity of a polypeptide of the invention, in the context of a biological sample (e.g., blood, serum, cells, tissue) to thereby determine whether an individual is afflicted
- a biological sample e.g., blood, serum, cells, tissue
- the invention also provides for prognostic (or predictive) assays for determining whether an individual is at risk of developing a disorder associated with aberrant expression or activity of a polypeptide of the invention. For example, mutations in a gene of the invention can be assayed in a
- Such assays can be used for prognostic or predictive pu ⁇ ose to thereby prophylactically treat an individual prior to the onset of a disorder characterized by or associated with aberrant expression or activity of a polypeptide of the invention.
- Another aspect of the invention provides methods for expression of a nucleic acid _ _ or polypeptide of the invention or activity of a polypeptide of the invention in an individual to thereby select appropriate therapeutic or prophylactic agents for that individual (referred to herein as "pharmacogenomics").
- Pharmacogenomics allows for the selection of agents (e.g., drugs) for therapeutic or prophylactic treatment of an individual based on the genotype of the individual (e.g., the genotype of the individual examined to determine the ability of the individual to respond to a particular agent).
- Yet another aspect of the invention pertains to monitoring the influence of agents
- An exemplary method for detecting the presence or absence of a polypeptide or nucleic acid of the invention in a biological sample involves obtaining a biological sample from a test subject and contacting the biological sample with a compound or an agent capable of detecting a polypeptide or nucleic acid (e.g., mRNA, genomic DNA) of the invention such that the presence of a polypeptide or nucleic acid of the invention is detected in the biological sample.
- a preferred agent for detecting mRNA or genomic DNA encoding a polypeptide of the invention is a labeled nucleic acid probe capable of hybridizing to mRNA or genomic DNA encoding a polypeptide of the invention.
- the nucleic acid probe can be, for example, a full-length cDNA, such as the nucleic acid of SEQ ED NO: 1, 2, 13, 14, 18, 19, 21, 22, or a portion thereof, such as an oligonucleotide of at least 15, 30, 50, 100, 250 or 500 nucleotides in length and sufficient to specifically hybridize under stringent conditions to a mRNA or genomic DNA encoding a polypeptide of the invention.
- oligonucleotide of at least 15, 30, 50, 100, 250 or 500 nucleotides in length and sufficient to specifically hybridize under stringent conditions to a mRNA or genomic DNA encoding a polypeptide of the invention.
- Other suitable probes for use in the diagnostic assays of the invention are described herein.
- a preferred agent for detecting a polypeptide of the invention is an antibody capable of binding to a polypeptide of the invention, preferably an antibody with a detectable label.
- Antibodies can be polyclonal, or more preferably, monoclonal. An intact antibody, or a fragment thereof (e.g., Fab or F(ab') 2 ) can be used.
- the term "labeled", with regard to the probe or antibody, is intended to encompass direct labeling of the probe or antibody by coupling (i.e., physically linking) a detectable substance to the probe or antibody, as well as indirect labeling of the probe or antibody by reactivity with another reagent that is directly labeled.
- Examples of indirect labeling include detection of a primary antibody using a fluorescently labeled secondary antibody and end- labeling of a DNA probe with biotin such that it can be detected with fluorescently labeled streptavidin.
- biological sample is intended to include tissues, cells and biological fluids isolated from a subject, as well as tissues, cells and fluids present within a subject. That is, the detection method of the invention can be used to detect mRNA, protein, or genomic DNA in a biological sample in vitro as well as in vivo.
- in vitro techniques for detection of mRNA include Northern hybridizations and in situ hybridizations.
- In vitro techniques for detection of a polypeptide of the invention include enzyme linked immunosorbent assays (ELISAs), Western blots, immunoprecipitations and immunofluorescence.
- In vitro techniques for detection of genomic DNA include Southern hybridizations.
- in vivo techniques for detection of a polypeptide of the invention include introducing into a subject a labeled antibody directed against the polypeptide.
- the antibody can be labeled with a radioactive marker whose presence and location in a subject can be detected by standard imaging techniques.
- the biological sample contains protein molecules from the test subject.
- the biological sample can contain mRNA molecules from the test subject or genomic DNA molecules from the test subject.
- a preferred biological sample is a peripheral blood leukocyte sample isolated by conventional means from a subject.
- the methods further involve obtaining a control biological sample from a control subject, contacting the control sample with a compound or agent capable of detecting a polypeptide of the invention or mRNA or genomic DNA encoding a polypeptide of the invention, such that the presence of the polypeptide or mRNA or genomic DNA encoding the polypeptide is detected in the biological sample, and comparing the presence of the polypeptide or mRNA or genomic DNA encoding the polypeptide in the control sample with the presence of the polypeptide or mRNA or genomic DNA encoding the polypeptide in the test sample.
- kits for detecting the presence of a polypeptide or nucleic acid of the invention in a biological sample can be used to determine if a subject is suffering from or is at increased risk of developing a disorder associated with aberrant expression of a polypeptide of the invention (e.g., a proliferative disorder, e.g., psoriasis or cancer).
- a disorder associated with aberrant expression of a polypeptide of the invention e.g., a proliferative disorder, e.g., psoriasis or cancer.
- the kit can comprise a labeled compound or agent capable of detecting the polypeptide or mRNA encoding the polypeptide in a biological sample and means for determining the amount of the polypeptide or mRNA in the sample (e.g., an antibody which binds the polypeptide or an oligonucleotide probe which binds to DNA or mRNA encoding the polypeptide).
- Kits can also include instructions for observing that the tested subject is suffering from or is at risk of developing a disorder associated with aberrant expression of the polypeptide if the amount of the polypeptide or mRNA encoding the polypeptide is above or below a normal level.
- the kit can comprise, for example: (1) a first antibody (e.g., attached to a solid support) which binds to a polypeptide of the invention; and, optionally, (2) a second, different antibody which binds to either the polypeptide or the first antibody and is conjugated to a detectable agent.
- a first antibody e.g., attached to a solid support
- a second, different antibody which binds to either the polypeptide or the first antibody and is conjugated to a detectable agent.
- the kit can comprise, for example: (1) an oligonucleotide, e.g., a detectably labeled oligonucleotide, which hybridizes to a nucleic acid
- the kit can also comprise, e.g., a buffering agent, a preservative, or a protein stabilizing agent.
- the kit can also comprise components necessary for detecting the detectable agent (e.g., an enzyme or a substrate).
- the kit can also contain a control sample or a series of control
- kits 15 samples which can be assayed and compared to the test sample contained.
- Each component of the kit is usually enclosed within an individual container and all of the various containers are within a single package along with instructions for observing whether the tested subject is suffering from or is at risk of developing a disorder associated with aberrant expression of the polypeptide.
- the methods described herein can furthermore be utilized as diagnostic or prognostic assays to identify subjects having or at risk of developing a disease or disorder associated with aberrant expression or activity of a polypeptide of the invention.
- the assays described herein such as the preceding diagnostic assays or the following assays, can be utilized to identify a subject having or at risk of developing a disorder associated with aberrant expression or activity of a polypeptide of the invention, e.g., a neurological disorder, e.g., Alzheimer's disease, a bone disorder, or aliest cardiovascular disorder.
- the prognostic assays can be utilized to identify a subject having or at risk for developing such a disease or disorder.
- test sample refers to a biological sample obtained from a subject of interest.
- a test sample can be a biological fluid (e.g., serum), cell sample, or tissue.
- the prognostic assays described herein can be used to determine whether a subject can be administered an agent (e.g., an agonist, antagonist, peptidomimetic, protein, peptide, nucleic acid, small molecule, or other drug candidate) to treat a disease or disorder associated with aberrant expression or activity of a polypeptide of the invention.
- an agent e.g., an agonist, antagonist, peptidomimetic, protein, peptide, nucleic acid, small molecule, or other drug candidate
- agents e.g., an agonist, antagonist, peptidomimetic, protein, peptide, nucleic acid, small molecule, or other drug candidate
- agents e.g., an agonist, antagonist, peptidomimetic, protein, peptide, nucleic acid, small molecule, or other drug candidate
- such methods can be used to determine whether a subject can be effectively treated with a specific agent or class of agents (e.g., agents of a type which decrease activity of the
- the present invention provides methods for determining whether a subject can be effectively treated with an agent for a disorder associated with aberrant expression or activity of a polypeptide of the invention in which a test sample is obtained and the polypeptide or nucleic acid encoding the polypeptide is detected (e.g., wherein the presence of the polypeptide or nucleic acid is diagnostic for a subject that can be administered the agent to treat a disorder associated with aberrant expression or activity of the polypeptide).
- the methods of the invention can also be used to detect genetic lesions or mutations in a gene of the invention, thereby determining if a subject with the lesioned gene is at risk for a disorder characterized aberrant expression or activity of a polypeptide of the invention.
- the methods include detecting, in a sample of cells from the subject, the presence or absence of a genetic lesion or mutation characterized by at least one of an alteration affecting the integrity of a gene encoding the polypeptide of the invention, or the mis-expression of the gene encoding the polypeptide of the invention.
- such genetic lesions or mutations can be detected by ascertaining the existence of at least one of: 1) a deletion of one or more nucleotides from the gene; 2) an addition of one or more nucleotides to the gene; 3) a substitution of one or more nucleotides of the gene; 4) a chromosomal rearrangement of the gene; 5) an alteration in the level of a messenger RNA transcript of the gene; 6) an aberrant modification of the gene, such as of the methylation pattern of the genomic DNA; 7) the presence of a non-wild type splicing pattern of a messenger RNA transcript of the gene; 8) a non- wild type level of a the protein encoded by the gene; 9) an allelic loss of the gene; and 10) an inappropriate post-translational modification of the protein encoded by the gene.
- assay techniques known in the art which can be used for detecting lesions in a gene.
- detection of the lesion involves the use of a probe/primer in a polymerase chain reaction (PCR) (see, e.g., U.S. Patent Nos. 4,683,195 and 4,683,202), such as anchor PCR or RACE PCR, or, alternatively, in a ligation chain reaction (LCR) (see, e.g., Landegran et al. (1988) Science 241 :1077-1080; and Nakazawa et al. (1994) Proc. Natl. Acad. Sci. USA 91:360-364), the latter of which can be particularly useful for detecting point mutations in a gene (see, e.g., Abravaya et al.
- PCR polymerase chain reaction
- LCR ligation chain reaction
- This method can include the steps of collecting a sample of cells from a patient, isolating nucleic acid (e.g., genomic, mRNA or both) from the cells of the sample, contacting the nucleic acid sample with one or more primers which specifically hybridize to the selected gene under conditions such that hybridization and amplification of the gene (if present) occurs, and detecting the presence or absence of an amplification product, or detecting the size of the amplification product and comparing the length to a control sample. It is anticipated that PCR and or LCR may be desirable to use as a preliminary amplification step in conjunction with any of the techniques used for detecting mutations described herein.
- nucleic acid e.g., genomic, mRNA or both
- Alternative amplification methods include: self sustained sequence replication (Guatelli et al. (1990) Proc. Natl. Acad. Sci. USA 87:1874-1878), transcriptional amplification system (Kwoh, et al. (1989) Proc. Natl Acad. Sci. USA 86:1173-1177), Q- Beta Replicase (Lizardi et al. (1988) Bio/Technology 6:1197), or any other nucleic acid amplification method, followed by the detection of the amplified molecules using techniques well known to those of skill in the art. These detection schemes are especially useful for the detection of nucleic acid molecules if such molecules are present in very low numbers.
- mutations in a selected gene from a sample cell can be identified by alterations in restriction enzyme cleavage patterns.
- sample and control DNA is isolated, amplified (optionally), digested with one or more restriction endonucleases, and fragment length sizes are determined by gel electrophoresis and compared. Differences in fragment length sizes between sample and control DNA indicates mutations in the sample DNA.
- sequence specific ribozymes see, e.g., U.S. Patent No. 5,498,531 can be used to score for the presence of specific mutations by development or loss of a ribozyme cleavage site.
- genetic mutations can be identified by hybridizing a sample and control nucleic acids, e.g., DNA or RNA, to high density arrays containing hundreds or thousands of oligonucleotides probes (Cronin et al. (1996) Human Mutation 7:244-255; Kozal et al. (1996) Nature Medicine 2:753-759).
- genetic mutations can be identified in two-dimensional arrays containing light-generated D ⁇ A probes as described in Cronin et al., supra. Briefly, a first hybridization array of probes can be used to scan through long stretches of DNA in a sample and control to identify base changes between the sequences by making linear arrays of sequential overlapping probes.
- This step allows the identification of point mutations.
- This step is followed by a second hybridization array that allows the characterization of specific mutations by using smaller, specialized probe arrays complementary to all variants or mutations detected.
- Each mutation array is composed of parallel probe sets, one complementary to the wild- type gene and the other complementary to the mutant gene.
- any of a variety of sequencing reactions known in the art can be used to directly sequence the selected gene and detect mutations by comparing the sequence of the sample nucleic acids with the corresponding wild-type (control) sequence.
- Examples of sequencing reactions include those based on techniques developed by Maxim and Gilbert ((1977) Proc. Natl. Acad. Sci. USA 74:560) or Sanger ((1977) Proc. Natl. Acad. Sci. USA 74:5463). It is also contemplated that any of a variety of automated sequencing procedures can be utilized when performing the diagnostic assays ((1995) Bio/Techniques 19:448), including sequencing by mass spectrometry (see, e.g., PCT Publication No. WO 94/16101; Cohen et al. (1996) Adv. Chromatogr. 36:127- 162; and Griffin et al. (1993) Appl Biochem. Biotechnol 38:147-159).
- RNA/RNA or RNA/DNA heteroduplexes Other methods for detecting mutations in a selected gene include methods in which protection from cleavage agents is used to detect mismatched bases in RNA/RNA or RNA/DNA heteroduplexes (Myers et al. (1985) Science 230:1242).
- the technique of "mismatch cleavage" entails providing heteroduplexes formed by hybridizing (labeled) RNA or DNA containing the wild-type sequence with potentially mutant RNA or DNA obtained from a tissue sample.
- the double-stranded duplexes are treated with an agent which cleaves single-stranded regions of the duplex such as which will exist due to basepair mismatches between the control and sample strands.
- RNA/DNA duplexes can be treated with RNase to digest mismatched regions, and DNA/DNA hybrids can be treated with S 1 nuclease to digest mismatched regions.
- either DNA/DNA or RNA DNA duplexes can be treated with hydroxylamine or osmium tetroxide and with piperidine in order to digest mismatched regions. After digestion of the mismatched regions, the resulting material is then separated by size on denaturing polyacrylamide gels to determine the site of mutation. See, e.g., Cotton et al. (1988) Proc. Natl. Acad. Sci. USA 85:4397; Saleeba et al. (1992) Methods Enzymol 217:286-295.
- the control DNA or RNA can be labeled for detection.
- the mismatch cleavage reaction employs one or more proteins that recognize mismatched base pairs in double-stranded DNA (so called "DNA mismatch repair" enzymes) in defined systems for detecting and mapping point mutations in cDNAs obtained from samples of cells.
- DNA mismatch repair enzymes
- the mutY enzyme of E. coli cleaves A at G/A mismatches and the thymidine DNA glycosylase from HeLa cells cleaves T at G/T mismatches (Hsu et al. (1994) Carcinogenesis 15:1657-1662).
- a probe based on a selected sequence is hybridized to a cDNA or other DNA product from a test cell(s).
- the duplex is treated with a DNA mismatch repair enzyme, and the cleavage products, if any, can be detected from electrophoresis protocols or the like. See, e.g., U.S. Patent No. 5,459,039.
- alterations in electrophoretic mobility will be used to identify mutations in genes.
- single strand conformation polymo ⁇ hism may be used to detect differences in electrophoretic mobility between mutant and wild type nucleic acids (Orita et al. (1989) Proc. Natl. Acad. Sci. USA 86:2766; see also Cotton (1993) Mutat. Res. 285:125-144; Hayashi (1992) Genet. Anal. Tech. Appl 9:73- 79). Single-stranded DNA fragments of sample and control nucleic acids will be denatured and allowed to renature.
- the secondary structure of single-stranded nucleic acids varies according to sequence, and the resulting alteration in electrophoretic mobility enables the detection of even a single base change.
- the DNA fragments may be labeled or detected with labeled probes.
- the sensitivity of the assay may be enhanced by using RNA (rather than DNA), in which the secondary structure is more sensitive to a change in sequence.
- the subject method utilizes heteroduplex analysis to separate double stranded heteroduplex molecules on the basis of changes in electrophoretic mobility (Keen et al. (1991) Trends Genet. 7:5).
- the movement of mutant or wild-type fragments in polyacrylamide gels containing a gradient of denaturant is assayed using denaturing gradient gel electrophoresis (DGGE) (Myers et al. (1985) Nature 313:495).
- DGGE denaturing gradient gel electrophoresis
- DNA will be modified to insure that it does not completely denature, for example by adding a "GC clamp of approximately 40 bp of high- melting GC-rich DNA by PCR.
- a temperature gradient is used in place of a denaturing gradient to identify differences in the mobility of control and sample DNA (Rosenbaum and Reissner (1987) Biophys. Chem. 265:12753).
- oligonucleotide primers may be prepared in which the known mutation is placed centrally and then hybridized to target DNA under conditions which permit hybridization only if a perfect match is found (Saiki et al. (1986) Nature 324:163); Saiki et al. (1989) Proc. Natl. Acad. Sci. USA 86:6230).
- oligonucleotide primers may be prepared in which the known mutation is placed centrally and then hybridized to target DNA under conditions which permit hybridization only if a perfect match is found (Saiki et al. (1986) Nature 324:163); Saiki et al. (1989) Proc. Natl. Acad. Sci. USA 86:6230).
- oligonucleotides are hybridized to PCR amplified target DNA or a number of different mutations when the oligonucleotides are attached to the hybridizing membrane and hybridized with labeled target DNA.
- allele specific amplification technology which depends on selective PCR amplification may be used in conjunction with the instant invention.
- Oligonucleotides used as primers for specific amplification may carry the mutation of interest in the center of the molecule (so that amplification depends on differential hybridization) (Gibbs et al. (1989) Nucleic Acids Res. 17:2437-2448) or at the extreme 3' end of one primer where, under appropriate conditions, mismatch can prevent or reduce polymerase extension (Prossner (1993) Tibtech 11 :238).
- amplification may also be performed using Taq ligase for amplification (Barany (1991) Proc. Natl. Acad. Sci. USA 88:189). In such cases, ligation will occur only if there is a perfect match at the 3' end of the 5' sequence making it possible to detect
- the methods described herein may be performed, for example, by utilizing prepackaged diagnostic kits comprising at least one probe nucleic acid or antibody reagent described herein, which may be conveniently used, e.g., in clinical settings to diagnose
- any cell type or tissue e.g., chondrocytes, in which the polypeptide of the invention is expressed maybe utilized in the prognostic assays described herein.
- Agents, or modulators which have a stimulatory or inhibitory effect on activity or expression of a polypeptide of the invention as identified by a screening assay described herein can be administered to individuals to treat (prophylactically or therapeutically) _ ⁇ . disorders associated with abercant activity of the polypeptide.
- the pharmacogenomics i.e., the study of the relationship between an individual's genotype and that individual's response to a foreign compound or drug
- Differences in metabolism of therapeutics can lead to severe toxicity or therapeutic failure by altering the relation between dose and blood concentration of the pharmacologically active drug.
- the pharmacogenomics of the individual permits the selection of effective agents (e.g., drugs) for prophylactic or therapeutic treatments based on a consideration of the individual's genotype. Such pharmacogenomics can further be used to determine appropriate dosages and therapeutic regimens. Accordingly, the activity of a polypeptide of the invention, expression of a nucleic acid of the invention, or mutation content of a gene of the invention in an individual can be determined to thereby select appropriate agent(s) for therapeutic or prophylactic treatment of the individual.
- Pharmacogenomics deals with clinically significant hereditary variations in the response to drugs due to altered drug disposition and abnormal action in affected persons. See, e.g., Linder (1997) Clin. Chem. 43(2):254-266.
- two types of pharmacogenetic conditions can be differentiated. Genetic conditions transmitted as a single factor altering the way drugs act on the body are refened to as "altered drug action.” Genetic conditions transmitted as single factors altering the way the body acts on drugs are refened to as "altered drug metabolism”. These pharmacogenetic conditions can occur either as rare defects or as polymo ⁇ hisms.
- G6PD glucose-6-phosphate dehydrogenase deficiency
- oxidant drugs anti-malarials, sulfonamides, analgesics, nitrofurans
- the activity of drug metabolizing enzymes is a major determinant of both the intensity and duration of drug action.
- drug metabolizing enzymes e.g., N-acetyltransferase 2 (NAT 2) and cytochrome P450 enzymes CYP2D6 and CYP2C19
- NAT 2 N-acetyltransferase 2
- CYP2D6 and CYP2C19 cytochrome P450 enzymes
- the gene coding for CYP2D6 is highly polymo ⁇ hic and several mutations have been identified in PM, which all lead to the absence of functional CYP2D6. Poor metabolizers of CYP2D6 and CYP2C19 quite frequently experience exaggerated drug response and side effects when they receive standard doses. If a metabolite is the active therapeutic moiety, a PM will show no therapeutic response, as demonstrated for the analgesic effect of codeine mediated by its CYP2D6-formed metabolite mo ⁇ hine. The other extreme are the so called ultra-rapid metabolizers who do not respond to standard doses.
- the molecular basis of ultra-rapid metabolism has been identified to be due to CYP2D6 gene amplification.
- the activity of a polypeptide of the invention, expression of a nucleic acid encoding the polypeptide, or mutation content of a gene encoding the polypeptide in an individual can be determined to thereby select appropriate agent(s) for therapeutic or prophylactic treatment of the individual.
- pharmacogenetic studies can be used to apply genotyping of polymo ⁇ hic alleles encoding drug-metabolizing enzymes to the identification of an individual's drug responsiveness phenotype.
- Monitoring the influence of agents (e.g., drugs, compounds) on the expression or activity of a polypeptide of the invention can be applied not only in basic drug screening, but also in clinical trials.
- agents e.g., drugs, compounds
- the effectiveness of an agent, as determined by a screening assay as described herein, to increase gene expression, protein levels or protein activity can be monitored in clinical trials of subjects exhibiting decreased gene expression, protein levels, or protein activity.
- the effectiveness of an agent, as determined by a screening assay, to decrease gene expression, protein levels or protein activity can be monitored in clinical trials of subjects exhibiting increased gene expression, protein levels, or protein activity.
- expression or activity of a polypeptide of the invention and preferably, that of other polypeptide that have been implicated in for example, a cellular proliferation disorder can be used as a marker of the immune responsiveness of a particular cell.
- genes including those of the invention, that are modulated in cells by treatment with an agent (e.g., compound, drug or small molecule) which modulates activity or expression of a polypeptide of the invention (e.g., as identified in a screening assay described herein) can be identified.
- an agent e.g., compound, drug or small molecule
- a polypeptide of the invention e.g., as identified in a screening assay described herein
- cells can be isolated and RNA prepared and analyzed for the levels of expression of a gene of the invention and other genes implicated in the disorder.
- the levels of gene expression can be quantified by Northern blot analysis or RT-PCR, as described herein, or alternatively by measuring the amount of protein produced, by one of the methods as described herein, or by measuring the levels of activity of a gene of the invention or other genes.
- the gene expression pattern can serve as a marker, indicative of the physiological response of the cells to the agent. Accordingly, this response state may be determined before, and at various points during, treatment of the individual with the agent.
- the present invention provides a method for monitoring the effectiveness of treatment of a subject with an agent (e.g., an agonist, antagonist, peptidomimetic, protein, peptide, nucleic acid, small molecule, or other drug candidate identified by the screening assays described herein) comprising the steps of (i) obtaining a pre-administration sample from a subject prior to administration of the agent; (ii) detecting the level of the polypeptide or nucleic acid of the invention in the preadministration sample; (iii) obtaining one or more post-administration samples from the subject; (iv) detecting the level the of the polypeptide or nucleic acid of the invention in the post-administration samples; (v) comparing the level of the polypeptide or nucleic acid of the invention in the pre-administration sample with the level of the polypeptide or nucleic acid of the invention in the post-administration sample or samples; and (vi) altering the administration of the agent to the subject accordingly.
- an agent e.g., an agonist, antagonist,
- increased administration of the agent may be desirable to increase the expression or activity of the polypeptide to higher levels than detected, i.e., to increase the effectiveness of the agent.
- decreased administration of the agent may be desirable to decrease expression or activity of the polypeptide to lower levels than detected, i.e., to decrease the effectiveness of the agent.
- the present invention provides for both prophylactic and therapeutic methods of treating a subject at risk of (or susceptible to) a disorder or having a disorder associated with abe ⁇ ant expression or activity of a polypeptide of the invention.
- disorders characterized by aberrant expression or activity of the polypeptides of the invention include neurodegenerative disorders.
- the polypeptides of the invention can be used to promote nerve regeneration in the central and peripheral nervous system, to treat neurodegenerative disorders (e.g., Alzheimer's disease), memory loss, and neuronal damage (e.g., stroke), as well as other uses described herein.
- the HtrA-2 and TANGO 219 polypeptides of the invention can be used to modulate osteoblast proliferation and differentiation (e.g., to treat osteoporosis or arthritis).
- the invention provides a method for preventing in a subject, a disease or condition associated with an abenant expression or activity of a polypeptide of the invention, by administering to the subject an agent which modulates expression or at least one activity of the polypeptide.
- Subjects at risk for a disease which is caused or contributed to by abenant expression or activity of a polypeptide of the invention can be identified by, for example, any or a combination of diagnostic or prognostic assays as described herein.
- Administration of a prophylactic agent can occur prior to the manifestation of symptoms characteristic of the abenancy, such that a disease or disorder is prevented or, alternatively, delayed in its progression.
- an agonist or antagonist agent can be used for treating the subject.
- an antagonist of an HtrA-2 protein may be used to treat a proliferative disorder, e.g., cardiac hype ⁇ lasia, associated with abenant HtrA-2 expression or activity.
- the appropriate agent can be determined based on screening assays described herein.
- the modulatory method of the invention involves contacting a cell with an agent that modulates one or more of the activities of the polypeptide.
- An agent that modulates activity can be an agent as described herein, such as a nucleic acid or a protein, a naturally-occurring cognate ligand of the polypeptide, a peptide, a peptidomimetic, or other small molecule.
- the agent stimulates one or more of the biological activities of the polypeptide. Examples of such stimulatory agents include the active polypeptide of the invention and a nucleic acid molecule encoding the polypeptide of the invention that has been introduced into the cell.
- the agent inhibits one or more of the biological activities of the polypeptide of the invention.
- inhibitory agents include antisense nucleic acid molecules and antibodies.
- These modulatory methods can be performed in vitro (e.g., by culturing the cell with the agent) or, alternatively, in vivo (e.g., by administering the agent to a subject).
- the present invention provides methods of treating an individual afflicted with a disease or disorder characterized by abenant expression or activity of a polypeptide of the invention.
- the method involves administering an agent (e.g., an agent identified by a screening assay described herein), or combination of agents that modulates (e.g., upregulates or downregulates) expression or activity.
- the method 5 involves administering a polypeptide of the invention or a nucleic acid molecule of the invention as therapy to compensate for reduced or abenant expression or activity of the polypeptide.
- Stimulation of activity is desirable in situations in which activity or expression is abnormally low or downregulated and/or in which increased activity is likely to have a 10 beneficial effect, e.g., in treatment of neurodegenerative disorders.
- inhibition of activity is desirable in situations in which activity or expression is abnormally high or upregulated and/or in which decreased activity is likely to have a beneficial effect, e.g., in treatment of an osteoblast proliferative disorder.
- Clones containing cDNA molecules encoding human HtrA-2 (clone EpT214) and human TANGO 219 (clone EpT219) were deposited with the American Type Culture Collection (Manassas, VA) on September 25, 1998 as Accession Number 98899, as part of a composite deposit representing a mixture of five strains, each carrying one recombinant plasmid harboring a particular cDNA clone.
- an aliquot of the mixture can be streaked out to single colonies on nutrient medium (e.g., LB plates) supplemented with lOO ⁇ g/ml ampicillin, single colonies grown, and then plasmid DNA extracted using a standard minipreparation procedure.
- a sample of the DNA minipreparation can be digested with a combination of the restriction enzymes
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Abstract
Description
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Cited By (12)
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WO2004039407A1 (en) * | 2002-11-01 | 2004-05-13 | Takeda Pharmaceutical Company Limited | Apoptosis inducer |
EP1421112A4 (en) * | 2001-07-30 | 2005-02-02 | Prince Henrys Inst Med Res | Novel serine protease |
WO2005071107A1 (en) * | 2004-01-27 | 2005-08-04 | Eberhard-Karls-Universität Tübingen | A141s and g399s mutation in the omi/htra2 protein in parkinson's disease |
US7304144B2 (en) | 1998-11-13 | 2007-12-04 | Immunex Corporation | Antibodies binding to human TSLP Polypeptides |
US7709217B2 (en) | 2001-07-23 | 2010-05-04 | Immunex Corporation | Modified human thymic stromal lymphopoietin |
US7718772B2 (en) | 2006-12-14 | 2010-05-18 | Schering-Plough Animal Health Corporation | Canine thymic stromal lymphopoietin protein and uses thereof |
WO2010086445A1 (en) | 2009-01-30 | 2010-08-05 | Institut Curie | Tslp promotes immune evasion and persistence of viruses |
US7928198B2 (en) | 1998-09-21 | 2011-04-19 | Schering Corporation | IL-B50 polypeptide |
US7982016B2 (en) | 2007-09-10 | 2011-07-19 | Amgen Inc. | Antigen binding proteins capable of binding thymic stromal lymphopoietin |
US8232372B2 (en) | 2006-12-14 | 2012-07-31 | Schering Corp. | Engineered anti-TSLP antibody |
US8637019B2 (en) | 2009-11-04 | 2014-01-28 | Merck Sharp & Dohme Corp. | Engineered anti-TSLP antibody |
US9920123B2 (en) | 2008-12-09 | 2018-03-20 | Genentech, Inc. | Anti-PD-L1 antibodies, compositions and articles of manufacture |
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JPH09107980A (en) * | 1995-08-17 | 1997-04-28 | Japan Tobacco Inc | New physiologically active protein |
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1999
- 1999-12-29 EP EP99967734A patent/EP1140976A4/en not_active Withdrawn
- 1999-12-29 WO PCT/US1999/031157 patent/WO2000039149A2/en not_active Application Discontinuation
- 1999-12-29 AU AU23966/00A patent/AU2396600A/en not_active Abandoned
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WO1998025959A2 (en) * | 1996-12-11 | 1998-06-18 | Chiron Corporation | Secreted human proteins |
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US7928198B2 (en) | 1998-09-21 | 2011-04-19 | Schering Corporation | IL-B50 polypeptide |
US7786271B2 (en) | 1998-11-13 | 2010-08-31 | Immunex Corporation | Antibodies that inhibit TSLP activity |
US9346870B2 (en) | 1998-11-13 | 2016-05-24 | Immunex Corporation | Antibodies that inhibit TSLP activity |
US7304144B2 (en) | 1998-11-13 | 2007-12-04 | Immunex Corporation | Antibodies binding to human TSLP Polypeptides |
US8444979B2 (en) | 1998-11-13 | 2013-05-21 | Immunex Corporation | Antibodies that inhibit TSLP activity |
US7405058B2 (en) | 1998-11-13 | 2008-07-29 | Immunex Corporation | Human TSLP polynucleotides |
US8598318B2 (en) | 2001-07-23 | 2013-12-03 | Amgen Inc. | Modified human thymic stromal lymphopoietin |
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AU2002319002B2 (en) * | 2001-07-30 | 2008-05-29 | Prince Henry's Institute Of Medical Research | Serine proteases |
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US8232372B2 (en) | 2006-12-14 | 2012-07-31 | Schering Corp. | Engineered anti-TSLP antibody |
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US8076456B2 (en) | 2006-12-14 | 2011-12-13 | Intervet Inc. | Fusion proteins comprising canine thymic stromal lymphopoietin protein and uses thereof |
US7718772B2 (en) | 2006-12-14 | 2010-05-18 | Schering-Plough Animal Health Corporation | Canine thymic stromal lymphopoietin protein and uses thereof |
US8163284B2 (en) | 2007-09-10 | 2012-04-24 | Amgen Inc. | Methods of treating TSLP-related inflammatory disorders |
US9284372B2 (en) | 2007-09-10 | 2016-03-15 | Amgen Inc. | Antigen binding proteins capable of binding thymic stromal lymphopoietin |
US7982016B2 (en) | 2007-09-10 | 2011-07-19 | Amgen Inc. | Antigen binding proteins capable of binding thymic stromal lymphopoietin |
US10287348B2 (en) | 2007-09-10 | 2019-05-14 | Amgen Inc. | Antigen binding proteins capable of binding thymic stromal lymphopoietin |
US9920123B2 (en) | 2008-12-09 | 2018-03-20 | Genentech, Inc. | Anti-PD-L1 antibodies, compositions and articles of manufacture |
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US8637019B2 (en) | 2009-11-04 | 2014-01-28 | Merck Sharp & Dohme Corp. | Engineered anti-TSLP antibody |
Also Published As
Publication number | Publication date |
---|---|
EP1140976A4 (en) | 2003-05-21 |
WO2000039149A3 (en) | 2000-11-16 |
AU2396600A (en) | 2000-07-31 |
EP1140976A2 (en) | 2001-10-10 |
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