WO2008070357A2 - Smoothened polypeptides and methods of use - Google Patents
Smoothened polypeptides and methods of use Download PDFInfo
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- WO2008070357A2 WO2008070357A2 PCT/US2007/083027 US2007083027W WO2008070357A2 WO 2008070357 A2 WO2008070357 A2 WO 2008070357A2 US 2007083027 W US2007083027 W US 2007083027W WO 2008070357 A2 WO2008070357 A2 WO 2008070357A2
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- LHUGIWLBYVBNMF-UHFFFAOYSA-N CC(CC1)CCC1C1CCCC1 Chemical compound CC(CC1)CCC1C1CCCC1 LHUGIWLBYVBNMF-UHFFFAOYSA-N 0.000 description 1
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/18—Drugs for disorders of the alimentary tract or the digestive system for pancreatic disorders, e.g. pancreatic enzymes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P11/00—Drugs for disorders of the respiratory system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P15/00—Drugs for genital or sexual disorders; Contraceptives
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P15/00—Drugs for genital or sexual disorders; Contraceptives
- A61P15/14—Drugs for genital or sexual disorders; Contraceptives for lactation disorders, e.g. galactorrhoea
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
- A61P17/06—Antipsoriatics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P21/00—Drugs for disorders of the muscular or neuromuscular system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
- A61P35/02—Antineoplastic agents specific for leukemia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P5/00—Drugs for disorders of the endocrine system
Definitions
- stomach cancer Bosset et al., Nature, 425: 846-851 (2003)
- colon cancer Douard et al., Surgery, 139: 665-670 (2006)
- liver cancer Sictician et al., Carcinogenesis, 27: 748-757 (2006)
- melanoma Pons et al., Clin. Tr ansl.
- the invention provides an isolated or purified polypeptide or a peptidomimetic, as well as a fatty acid derivative thereof.
- the polypeptide or peptidomimetic comprises an amino acid sequence corresponding to a portion of a SMO protein, wherein the portion comprises an amino acid sequence of any of SEQ ID NOs: 2 to 4, each sequence of which generally corresponds to an intracellular loop of the SMO protein.
- the polypeptide or peptidomimetic can be a functional fragment of the portion, which functional fragment comprises at least 7 contiguous amino acids of SEQ ID NO: 2, 3, or 4.
- the polypeptide or peptidomimetic can be a functional variant of the portion or of the functional fragment.
- the inventive polypeptides and peptidomimetics (including fatty acid derivatives thereof, functional fragments and functional variants) inhibit the HH pathway and/or proliferation of a diseased cell.
- the invention also provides conjugates comprising any of the inventive polypeptides or peptidomimetics, or fatty acid derivatives thereof. Further provided are nucleic acids encoding the inventive polypeptides, as well as related recombinant expression vectors and host cells. Pharmaceutical compositions comprising any of the inventive polypeptides, peptidomimetics, fatty acid derivatives, conjugates, nucleic acids, and recombinant expression vectors are furthermore provided by the invention. [0006] The inventive pharmaceutical compositions are useful for inhibiting proliferation of a diseased cell, such that the invention moreover provides a method of inhibiting proliferation of a diseased cell. The method comprises contacting the diseased cell with an inventive pharmaceutical composition in an amount effective to inhibit proliferation of the diseased cell.
- the invention provides other methods of use of the inventive pharmaceutical compositions, including a method of treating or preventing cancer in a host, a method of treating psoriasis in a host, a method of treating a neoplasm in a host, and a method of inhibiting expression of a gene selected from the group consisting of GIi-I, Gli-2, Gli-3, Ptch, Shh, Smo, and NES in a diseased cell.
- Figure 1 depicts the % of viable MCF-7 breast cancer cells (relative to a control) upon a 48-hour treatment as a function of concentration of SMOil-1, SMOi2-l, and SMOi3- 1 lipidated polypeptides, in accordance with an embodiment of the invention.
- Figure 2 depicts the viable cell mass of gastric adenocarcinoma cells upon treatment with 0, 5, or 10 ⁇ M (white, black, lined bars, respectively) of cyclopamine, SMOi3-l, or SMOi2-l.
- Figure 3 depicts the % of viable MCF-7 cells (relative to a control) upon a 48- hour treatment with polypeptides comprising amino acid sequences based on the third intracellular loop of the SMO protein, in accordance with an embodiment of the invention.
- Figure 4 depicts the % of viable SK-Mel2 cells upon a 48-hour treatment with SMOi2-8 or retroinverso analogues, SMOi2-16 and SMOi2-17, in accordance with an embodiment of the invention.
- Figure 5 depicts the relative expression of genes of the FfH pathway in DU 145 cells upon a 48-hour treatment with cyclopamine, SMOi3-l, or SMOi2-l polypeptides, in accordance with an embodiment of the invention.
- Figure 7 depicts the toxicity of the second intracellular loop derivatives (SMOi2- 12 (circles) and SMOi2-17 (squares)) as determined by MTT assay in SK-Mel2 melanoma cells after 48 h of exposure to the peptide compounds, in accordance with an embodiment of the invention.
- Figure 8 depicts the fluorescence emission intensity measured for probes with increasing SMOi2-8/WMC-77 ratio, in accordance with an embodiment of the invention.
- Figure 9 depicts the growth inhibition of breast cancer, melanoma, heptaoma, and pancreatic cancer cells upon exposure to SMOi2-12 (diamonds) or SMOi2-20 (squares), in accordance with an embodiment of the invention.
- SMO proteins are transmembrane proteins which function in the Hedgehog (HH) signal transduction pathway (see, for instance, Huangfu and Anderson, Development 133: 3- 14 (2006)), which, as discussed is related to several cancers, e.g., breast cancer, prostate cancer, stomach cancer, etc. These proteins comprise an extracellular domain, seven transmembrane domains, three intracellular loops, and an intracellular domain.
- SMO proteins resemble a G-protein coupled receptor (GPCR) in general topology but appear to signal differently from the GPCRs. Examples of SMO proteins include human SMO proteins (e.g., GenBank Accession No.
- NP_005622 (SEQ ID NO: I)), as well as orthologs thereof, such as mouse SMO proteins (e.g., GenBank Accession No. NP_795970), rat SMO proteins (e.g., GenBank Accession No. NPJB6939), fruit fly SMO proteins (e.g., GenBank Accession No. NP_523443), zebra fish SMO proteins (e.g., GenBank Accession No. NP_571102), chicken SMO proteins, (e.g., GenBank Accession No. AAB84389), African clawed frog SMO proteins (e.g., GenBank Accession No. AAKl 5464).
- mouse SMO proteins e.g., GenBank Accession No. NP_795970
- rat SMO proteins e.g., GenBank Accession No. NPJB6939
- fruit fly SMO proteins e.g., GenBank Accession No. NP_523443
- zebra fish SMO proteins
- the invention provides an isolated or purified polypeptide comprising an amino acid sequence corresponding to a portion of a SMO protein, wherein the portion comprises an amino acid sequence of any of SEQ ID NOs: 2 to 4, each of which is identical to or substantially identical to an intracellular loop of the SMO protein.
- SEQ ID NO: 2 contains one additional amino acid (Leu) at the N-terminus of the second intracellular loop of SMO.
- the functional fragment can be any fragment comprising contiguous amino acids of the polypeptide of which it is a part, provided that the functional fragment inhibits proliferation of a diseased cell.
- Functional fragments encompass, for example, those parts of an inventive polypeptide that retain the ability to inhibit proliferation, or treat or prevent a disease (e.g., cancer, neoplasm, psoriasis), to a similar extent, the same extent, or to a higher extent, as the parent polypeptide.
- the functional fragment can comprise, for instance, about 10%, 25%, 30%, 50%, 68%, 80%, 90%, 95%, or more, of the parent polypeptide.
- the functional variant can comprise a retroinverso analogue of any of the inventive polypeptides or functional fragments described herein.
- retroinverso analogue refers to a polypeptide comprising a reversed amino acid sequence of a parent polypeptide, such that the amino acid sequence of the retroinverso analogue (when read from the N-terminus to the C-terminus) is the same as the amino acid sequence of the parent polypeptide when read from the C-terminus to the N-terminus.
- each of the amino acids is the D isomer of the amino acid, as opposed to the L isomer.
- polypeptides (including functional fragments and functional variants) and peptidomimetics of the invention can be of any length, i.e., can comprise any number of amino acids, provided that the polypeptide (or functional fragment or functional variant thereof) or peptidomimetic retains their biological activity, e.g., the ability to inhibit proliferation of a diseased cell, treat or prevent disease (e.g., cancer, neoplasm, psoriasis) in a host, etc.
- disease e.g., cancer, neoplasm, psoriasis
- the inventive polypeptide or peptidomimetic can be 50 to 5000 amino acids long, such as 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ,16, 20, 25, 30, 40, 50, 70, 75, 100, 125, 150, 175, 200, 300, 400, 500, 600, 700, 800, 900, 1000 or more amino acids in length.
- the polypeptides of the invention are 5 to 50 amino acids in length.
- the polypeptides (including functional fragments and functional variants) and peptidomimetics of the invention can comprise synthetic amino acids in place of one or more naturally-occurring amino acids.
- Such synthetic amino acids include, for example, aminocyclohexane carboxylic acid, norleucine, ⁇ -amino n-decanoic acid, homoserine, S-acetylaminomethyl-cysteine, trans-3- and trans-4-hydroxyproline, 4- aminophenylalanine, 4-benzoylphenylalanine, 4- nitrophenylalanine, 4-chlorophenylalanine, 4-carboxyphenylalanine, ⁇ -phenylserine, ⁇ -hydroxyphenylalanine, phenylglycine, ⁇ - naphthylalanine, cyclohexylalanine, cyclohexylglycine, indoline-2-carboxylic acid, 1,2,3,4- tetrahydroisoquinoline-3 -carboxylic acid, aminomalonic acid, aminomalonic acid monoamide, N'-benzyl-N'-methyl-lysine, N',N
- polypeptides including functional fragments and functional variants
- peptidomimetics of the invention can be lipidated (e.g., fatty acidated), glycosylated, amidated, carboxylated, phosphorylated, esterified, N-acylated, cyclized via, e.g., a disulfide bridge, or converted into an acid addition salt and/or optionally dimerized or polymerized, or conjugated.
- the lipid can be any lipid known in the art, such as, for example, a fatty acid, a farnesyl group (e.g., farnesyl diphosphate), a geranylgeranyl group (e.g., geranylgeranyl diphosphate), a phospholipid group, glycophosphatidylinositol, phosphatidylserine, phosphatidylethanolamine, sphingomyelin, phosphatidylcholine, cardiolipin, phosphatidylinositol, phosphatidic acid, lysophosphoglyceride, and a cholesterol group.
- a fatty acid e.g., farnesyl diphosphate
- a geranylgeranyl group e.g., geranylgeranyl diphosphate
- a phospholipid group glycophosphatidylinositol, phosphatidylserine, phosphatidylethanolamine,
- the lipidated derivative is a fatty acid derivative in which the polypeptide or peptidomimetic described herein comprises a fatty acid molecule.
- the fatty acid molecule can be any C 8 to C 20 fatty acid.
- the fatty acid molecule can be, e.g., lauric acid, palmitic acid, myristic acid, stearic acid, oleic acid, linoleic acid, ⁇ -linoleic acid, linolenic acid, arachidonic acid, timnodonic acid, docosohexenoic acid, erucic acid, arachidic acid, or behenic acid.
- the fatty acid may optionally contain additional functional groups, e.g., one or more amino groups on any of the carbon atoms.
- the fatty acid molecule is a C 8 to C 16 fatty acid, for example, a C 16 fatty acid.
- the fatty acid is palmitate.
- the fatty acid molecule can be attached to any suitable part of the inventive polypeptide (including functional fragment and functional variant) or peptidomimetic.
- the fatty acid derivative of the inventive polypeptide (including functional fragment and functional variant) or peptidomimetic comprises a fatty acid molecule at the amino (N-) terminus, the carboxyl (C-) terminus, or both the N- and C-termini.
- inventive polypeptides can comprise a cell-penetrating peptide (CPP).
- CPP cell-penetrating peptide
- Such a CPP facilitates the entry of the inventive polypeptide or peptidomimetic across the cell membrane and into the cell.
- CPPs are known in the art. See, for example, Deshayes et al., Cell. MoI. Life Set 62: 1839-1849 (2005); El-Andaloussi et al., Curr. Pharm. Design 11: 3597-3611 (2005); and Mae and Langel, Curr. Opin. Pharmacol. 6: 509-514 (2006)).
- Sequence X is SEQ ID NO: 87, n is 4, m is 0, each of Linker 1 and Linker 2 is beta- Ala, and the fatty acid is pahnitate.
- Methods of making dimeric and multimeric polypeptides are known in the art. See, for example, Wrighton et al., Nature Biotechnology 15: 1261-1265 (1997). A preferred method of making a dimeric polypeptide also is set forth herein as Example 1.
- Suitable pharmaceutically acceptable acid addition salts include those derived from mineral acids, such as hydrochloric, hydrobromic, phosphoric, metaphosphoric, nitric, and sulphuric acids, and organic acids, such as tartaric, acetic, citric, malic, lactic, fumaric, benzoic, glycolic, gluconic, succinic, and arylsulphonic acids, for example, j?-toluenesulphonic acid.
- mineral acids such as hydrochloric, hydrobromic, phosphoric, metaphosphoric, nitric, and sulphuric acids
- organic acids such as tartaric, acetic, citric, malic, lactic, fumaric, benzoic, glycolic, gluconic, succinic, and arylsulphonic acids, for example, j?-toluenesulphonic acid.
- the nucleic acid does not comprise any insertions, deletions, inversions, and/or substitutions. However, it may be suitable in some instances, as discussed herein, for the nucleic acid to comprise one or more insertions, deletions, inversions, and/or substitutions.
- the nucleic acids of the invention are recombinant.
- the term "recombinant" refers to (i) molecules that are constructed outside living cells by joining natural or synthetic nucleic acid segments to nucleic acid molecules that can replicate in a living cell, or (ii) molecules that result from the replication of those described in (i) above.
- the replication can be in vitro replication or in vivo replication.
- the nucleic acids can be constructed based on chemical synthesis and/or enzymatic ligation reactions using procedures known in the art. See, for example, Sambrook et al., supra, and Ausubel et al., supra.
- a 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 upon hybridization (e.g., phosphorothioate derivatives and acridine substituted nucleotides).
- the nucleic acid can comprise any nucleotide sequence which encodes any of the inventive polypeptides, including functional fragments and functional variants.
- the nucleic acid can comprise a nucleotide sequence encoding any of SEQ ID NOs: 2 to 29, 32, 33, 38 to 48, 53 to 56, 59 to 66, 70 to 72, 76, and 80.
- the nucleic acid alternatively can comprise a nucleotide sequence which is degenerate to any of these sequences or a combination of degenerate sequences.
- the invention also provides an isolated or purified nucleic acid comprising a nucleotide sequence which is complementary to the nucleotide sequence of any of the nucleic acids described herein or a nucleotide sequence which hybridizes under stringent conditions to the nucleotide sequence of any of the nucleic acids described herein.
- the nucleic acids of the invention can be incorporated into a recombinant expression vector.
- the invention provides recombinant expression vectors comprising any of the nucleic acids of the invention.
- the term "recombinant expression vector” means a genetically-modified oligonucleotide or polynucleotide construct that permits the expression of an rnRNA, protein, polypeptide, or peptide by a host cell, when the construct comprises a nucleotide sequence encoding the mRNA, protein, polypeptide, or peptide, and the vector is contacted with the cell under conditions sufficient to have the mRNA, protein, polypeptide, or peptide expressed within the cell.
- the vectors of the invention are not naturally-occurring as a whole. However, parts of the vectors can be naturally-occurring.
- inventive recombinant expression vectors can comprise any type of nucleotides, including, but not limited to DNA and RNA, which can be single-stranded or double-stranded, synthesized or obtained in part from natural sources, and which can contain natural, non-natural or altered nucleotides.
- the recombinant expression vectors can comprise naturally-occurring, non-naturally-occuring internucleotide linkages, or both types of linkages.
- the non-naturally occurring or altered nucleotides or internucleotide linkages does not hinder the transcription or replication of the vector.
- the recombinant expression vector of the invention can be any suitable recombinant expression vector, and can be used to transform or transfect any suitable host. Suitable vectors include those designed for propagation and expansion or for expression or both, such as plasmids and viruses.
- the vector can be selected from the group consisting of the pUC series (Fermentas Life Sciences), the pBluescript series (Stratagene, LaJolla, CA), the pET series (Novagen, Madison, WI), the pGEX series (Pharmacia Biotech, Uppsala, Sweden), and the pEX series (Clontech, Palo Alto, CA).
- the recombinant expression vectors of the invention can be prepared using standard recombinant DNA techniques described in, for example, Sambrook et al., supra, and Ausubel et al., supra.
- Constructs of expression vectors, which are circular or linear, can be prepared to contain a replication system functional in a prokaryotic or eukaryotic host cell.
- Replication systems can be derived, e.g., from CoIEl, 2 ⁇ plasmid, ⁇ , SV40, bovine papilloma virus, and the like.
- the recombinant expression vector can include one or more marker genes, which allow for selection of transformed or transfected hosts.
- Marker genes include biocide resistance, e.g., resistance to antibiotics, heavy metals, etc., complementation in an auxotrophic host to provide prototrophy, and the like.
- Suitable marker genes for the inventive expression vectors include, for instance, neomycin/G418 resistance genes, hygromycin resistance genes, histidinol resistance genes, tetracycline resistance genes, and ampicillin resistance genes.
- the recombinant expression vector can comprise a native or normative promoter operably linked to the nucleotide sequence encoding the modified TCR, polypeptide, or protein (including functional portions and functional variants thereof), or to the nucleotide sequence which is complementary to or which hybridizes to the nucleotide sequence encoding the modified TCR, polypeptide, or protein.
- promoters e.g., strong, weak, inducible, tissue-specific and developmental-specific, is within the ordinary skill of the artisan.
- the combining of a nucleotide sequence with a promoter is also within the skill of the artisan.
- the promoter can be a non- viral promoter or a viral promoter, e.g., a cytomegalovirus (CMV) promoter, an S V40 promoter, an RSV promoter, and a promoter found in the long-terminal repeat of the murine stem cell virus.
- CMV cytomegalovirus
- inventive recombinant expression vectors can be designed for either transient expression, for stable expression, or for both. Also, the recombinant expression vectors can be made for constitutive expression or for inducible expression.
- the recombinant expression vectors can be made to include a suicide gene.
- suicide gene refers to a gene that causes the cell expressing the suicide gene to die.
- the suicide gene can be a gene that confers sensitivity to an agent, e.g., a drug, upon the cell in which the gene is expressed, and causes the cell to die when the cell is contacted with or exposed to the agent.
- agent e.g., a drug
- the invention further provides a host cell comprising any of the recombinant expression vectors described herein.
- the term "host cell” refers to any type of cell that can contain the inventive recombinant expression vector.
- the host cell can be a eukaryotic cell, e.g., plant, animal, fungi, or algae, or can be a prokaryotic cell, e.g., bacteria or protozoa.
- the host cell can be a cultured cell or a primary cell, i.e., isolated directly from an organism, e.g., a human.
- the host cell can be an adherent cell or a suspended cell, i.e., a cell that grows in suspension.
- Suitable host cells are known in the art and include, for instance, DH5 ⁇ E. coli cells, Chinese hamster ovarian cells, monkey VERO cells, COS cells, HEK293 cells, and the like.
- the host cell is preferably a prokaryotic cell, e.g., a DH5 ⁇ cell.
- the host cell is preferably a mammalian cell. Most preferably, the host cell is a human cell.
- the host cell can be of any cell type, can originate from any type of tissue, and can be of any developmental stage.
- the population of cells can be a heterogeneous population comprising the host cell comprising any of the recombinant expression vectors described, in addition to at least one other cell, e.g., a host cell (e.g., a T cell), which does not comprise any of the recombinant expression vectors, or a cell other than a T cell, e.g., a B cell, a macrophage, a neutrophil, an erythrocyte, a hepatocyte, an endothelial cell, an epithelial cells, a muscle cell, a brain cell, etc.
- a host cell e.g., a T cell
- a cell other than a T cell e.g., a B cell, a macrophage, a neutrophil, an erythrocyte, a hepatocyte, an endothelial cell, an epithelial cells, a muscle cell, a brain cell, etc.
- the population of cells can be a substantially homogeneous population, in which the population comprises mainly of host cells (e.g., consisting essentially of) comprising the recombinant expression vector.
- the population also can be a clonal population of cells, in which all cells of the population are clones of a single host cell comprising a recombinant expression vector, such that all cells of the population comprise the recombinant expression vector.
- the population of cells is a clonal population comprising host cells comprising a recombinant expression vector as described herein.
- conjugates e.g., bioconjugates, comprising any of the inventive polypeptides (including any of the functional fragments or functional variants) or peptidomimetics, nucleic acids, recombinant expression vectors, or host cells.
- Conjugates, as well as methods of synthesizing conjugates in general, are known in the art (See, for instance, Hudecz, F., Methods MoI. Biol. 298: 209-223 (2005) and Kirin et al., Inorg Chem. 44(15): 5405-5415 (2005)).
- inventive polypeptides including functional fragments and functional variants, peptidomimetics, fatty acid derivatives, nucleic acids, recombinant expression vectors, and host cells (including populations thereof) can be isolated, purified, synthetic, and/or recombinant.
- isolated means having been removed from its natural environment.
- purified as used herein means having been increased in purity, wherein “purity” is a relative term, and not to be necessarily construed as absolute purity. For example, the purity can be at least about 50%, can be greater than 60%, 70%, 80%, or 90%, or can be 100%.
- inventive polypeptides including functional fragments and functional variants), peptidomimetics, fatty acid derivatives, conjugates, nucleic acids, recombinant expression vectors, and host cells (including populations thereof), all of which are collectively referred to as "inventive materials" hereinafter, can be formulated into a composition, such as a pharmaceutical composition, hi this regard, the invention provides a pharmaceutical composition comprising any of the polypeptides (including functional fragments and functional variants), peptidomimetics, fatty acid derivatives, conjugates, nucleic acids, recombinant expression vectors, and host cells (including populations thereof), and a pharmaceutically acceptable carrier.
- inventive pharmaceutical compositions containing any of the inventive materials can comprise more than one inventive material, e.g., a polypeptide and a nucleic acid, or two or more different polypeptides.
- the pharmaceutical composition can comprise an inventive material in combination with another pharmaceutically active agent or drug, such as a chemotherapeutic agent, e.g., asparaginase, busulfan, carboplatin, cisplatin, daunorubicin, doxorubicin, fluorouracil, gemcitabine, hydroxyurea, methotrexate, paclitaxel, rituxirnab, vinblastine, vincristine, etc.
- chemotherapeutic agent e.g., asparaginase, busulfan, carboplatin, cisplatin, daunorubicin, doxorubicin, fluorouracil, gemcitabine, hydroxyurea, methotrexate, paclitaxel, rituxirnab
- the pharmaceutical composition comprises the inventive material in combination with a lipid.
- the lipid can be any lipid, including, for example, a fatty acid, a phospholipid, a sterol, a sphingolipid, a terpene, a glycerolipid, a glycerophospholipid, a prenol lipid, a saccharolipid, and a polyketide.
- lipids are known in the art. See, for example, Fahy et al., J Lipid Res. 46: 839-861 (2005).
- the lipid is a cholesterol.
- the pharmaceutically acceptable carrier can be any of those conventionally used and is limited only by chemico-physical considerations, such as solubility and lack of reactivity with the active compound(s), and by the route of administration.
- the pharmaceutically acceptable carriers described herein, for example, vehicles, adjuvants, excipients, and diluents, are well-known to those skilled in the art and are readily available to the public. It is preferred that the pharmaceutically acceptable carrier be one which is chemically inert to the active agent(s) and one which has no detrimental side effects or toxicity under the conditions of use.
- the choice of carrier will be determined in part by the particular inventive material, as well as by the particular method used to administer the inventive material.
- compositions of the invention there are a variety of suitable formulations of the pharmaceutical composition of the invention.
- the following formulations for oral, aerosol, parenteral, subcutaneous, intravenous, intramuscular, intraarterial, intrathecal, interperitoneal, rectal, and vaginal administration are exemplary and are in no way limiting. More than one route can be used to administer the inventive materials, and in certain instances, a particular route can provide a more immediate and more effective response than another route.
- the pharmaceutical composition is a topical formulation, an intravenous formulation, or a subcutaneous formulation.
- the pharmaceutical composition is a topical formulation.
- Topical formulations are well-known to those of skill in the art. Such formulations are particularly suitable in the context of the invention for application to the skin.
- the topical formulation of the invention can be, for instance, a cream, a lotion, an ointment, a patch, an oil, a paste, a spray, e.g., an aerosol spray, a gel, a mousse, a roll-on liquid, a solid stick, etc.
- the topical formulation of the invention is a cream, a lotion, an ointment, or a patch.
- the lotion also includes an ultraviolet (UV) light blocking agent, such as tocopheryl, aminobenzoic acid, Avobenzone, Cinoxate, dioxybenzone, homosalate, menthyl anthranilate, octocrylene, octyl methoxycinnamate, octisalate, oxybenzone, padimate O, phenylbenzimidazole, sulfonic acid, sulisobenzone, titanium dioxide, trolamine salicylate, and zinc oxide.
- UV ultraviolet
- Formulations suitable for oral administration can consist of (a) liquid solutions, such as an effective amount of the inventive material dissolved in diluents, such as water, saline, or orange juice; (b) capsules, sachets, tablets, lozenges, and troches, each containing a predetermined amount of the active ingredient, as solids or granules; (c) powders; (d) suspensions in an appropriate liquid; and (e) suitable emulsions.
- Liquid formulations may include diluents, such as water and alcohols, for example, ethanol, benzyl alcohol, and the polyethylene alcohols, either with or without the addition of a pharmaceutically acceptable surfactant.
- Capsule forms can be of the ordinary hard- or soft-shelled gelatin type containing, for example, surfactants, lubricants, and inert fillers, such as lactose, sucrose, calcium phosphate, and corn starch.
- Tablet forms can include one or more of lactose, sucrose, mannitol, corn starch, potato starch, alginic acid, microcrystalline cellulose, acacia, gelatin, guar gum, colloidal silicon dioxide, croscarmellose sodium, talc, magnesium stearate, calcium stearate, zinc stearate, stearic acid, and other excipients, colorants, diluents, buffering agents, disintegrating agents, moistening agents, preservatives, flavoring agents, and other pharmacologically compatible excipients.
- Lozenge forms can comprise the inventive material in a flavor, usually sucrose and acacia or tragacanth, as well as pastilles comprising the inventive material in an inert base, such as gelatin and glycerin, or sucrose and acacia, emulsions, gels, and the like containing, in addition to, such excipients as are known in the art.
- an inert base such as gelatin and glycerin, or sucrose and acacia, emulsions, gels, and the like containing, in addition to, such excipients as are known in the art.
- inventive material alone or in combination with other suitable components, can be made into aerosol formulations to be administered via inhalation.
- aerosol formulations can be placed into pressurized acceptable propellants, such as dichlorodifluoromethane, propane, nitrogen, and the like. They also may be formulated as pharmaceuticals for non-pressured preparations, such as in a nebulizer or an atomizer. Such spray formulations also may be used to spray mucosa.
- Formulations suitable for parenteral administration include aqueous and non-aqueous, isotonic sterile injection solutions, which can contain anti-oxidants, buffers, bacteriostats, and solutes that render the formulation isotonic with the blood of the intended recipient, and aqueous and non-aqueous sterile suspensions that can include suspending agents, solubilizers, thickening agents, stabilizers, and preservatives.
- Oils which can be used in parenteral formulations include petroleum, animal, vegetable, or synthetic oils. Specific examples of oils include peanut, soybean, sesame, cottonseed, corn, olive, petrolatum, and mineral. Suitable fatty acids for use in parenteral formulations include oleic acid, stearic acid, and isostearic acid. Ethyl oleate and isopropyl myristate are examples of suitable fatty acid esters.
- injectable formulations are in accordance with the invention.
- the requirements for effective pharmaceutical carriers for injectable compositions are well-known to those of ordinary skill in the art (see, e.g., Pharmaceutics and Pharmacy Practice, J.B. Lippincott Company, Philadelphia, PA, Banker and Chalmers, eds., pages 238-250 (1982), and ASHP Handbook on Injectable Drugs, Toissel, 4th ed., pages 622-630 (1986)).
- the cells e.g., dendritic cells
- the cells are administered via injection.
- inventive materials can be made into suppositories by mixing with a variety of bases, such as emulsifying bases or water-soluble bases.
- bases such as emulsifying bases or water-soluble bases.
- Formulations suitable for vaginal administration can be presented as pessaries, tampons, creams, gels, pastes, foams, or spray formulas containing, in addition to the active ingredient, such carriers as are known in the art to be appropriate.
- inventive materials of the invention can be formulated as inclusion complexes, such as cyclodextrin inclusion complexes, or liposomes.
- the amount or dose of the inventive material administered should be sufficient to effect, e.g., a therapeutic or prophylactic response, in the subject or animal over a reasonable time frame.
- sites on the inventive materials which are not necessary for the function of the inventive materials, are ideal sites for attaching a linker and/or a targeting moiety, provided that the linker and/or targeting moiety, once attached to the inventive materials, do(es) not interfere with the function of the inventive materials, i.e., the ability to inhibit proliferation of a diseased cell, or to treat or prevent disease (e.g., cancer, neoplasm, psoriasis).
- disease e.g., cancer, neoplasm, psoriasis
- inventive materials can be modified into a depot form, such that the manner in which the inventive materials is released into the body to which it is administered is controlled with respect to time and location within the body (see, for example, U.S. Patent No. 4,450,150).
- Depot forms of inventive materials can be, for example, an implantable composition comprising the inventive materials and a porous or non-porous material, such as a polymer, wherein the inventive materials is encapsulated by or diffused throughout the material and/or degradation of the non-porous material.
- the depot is then implanted into the desired location within the body and the inventive materials are released from the implant at a predetermined rate.
- the diseased cell can be a cell characteristic of or inflicted with any disease.
- the disease can be any disease, condition, or malady, especially any of those caused by or involving the proliferation of a cell.
- the disease can be, for example, a cancer or a noncancerous tumor, e.g., a cyst, a neoplasm, a fibroma, etc.
- the cancer can be any cancer, including any of acute lymphocytic cancer, acute myeloid leukemia, a sarcoma, e.g., alveolar rhabdomyosarcoma, bone cancer, brain cancer, breast cancer, cancer of the anus, anal canal, or anorectum, cancer of the eye, cancer of the intrahepatic bile duct, cancer of the joints, glioma, cancer of the neck, gallbladder, or pleura, cancer of the nose, nasal cavity, or middle ear, cancer of the oral cavity, cancer of the vulva, chronic lymphocytic leukemia, chronic myeloid cancer, colon cancer, esophageal cancer, cervical cancer, gastrointestinal carcinoid tumor.
- a sarcoma e.g., alveolar rhabdomyosarcoma
- bone cancer e.g., brain cancer, breast cancer, cancer of the anus, anal canal, or anorectum
- cancer of the eye cancer of
- the invention provides a method of treating or preventing cancer or a neoplasm (e.g., eye neoplasm) in a host.
- the method comprises administering to the host any of the pharmaceutical compositions described herein in an amount effective to treat the cancer or neoplasm.
- the inventive methods can provide any amount of any level of treatment or prevention of cancer or a neoplasm in a mammal.
- the treatment or prevention provided by the inventive method can include treatment or prevention of one or more conditions or symptoms of the disease, e.g., cancer, being treated or prevented.
- prevention can encompass delaying the onset of the disease, or a symptom or condition thereof.
- the pharmaceutical composition is topically administered to the host. In another preferred embodiment, the pharmaceutical composition is administered directly to the tumor, e.g., delivered intratumorally.
- the invention furthermore provides a method of treating psoriasis in a host comprising administering to the host any of the pharmaceutical compositions described herein in an amount effective to treat psoriasis in the host.
- Psoriasis is a common skin disease characterized by thickened patches of inflamed, red skin covered with thick, silvery scales.
- the psoriasis can be any form of psoriasis including, for example, plaque psoriasis, or psoriasis vulgaris, pustular psoriasis, guttate psoriasis, and inverse psoriasis.
- the invention also provides a method of inhibiting the Hedgehog signal transduction pathway.
- the method comprises contacting the diseased cell with any of the pharmaceutical compositions described herein in an amount effective to inhibit the Hedgehog signal transduction pathway. Since expression of certain genes are activated for transcription upon activation of the Hedgehog signal transduction pathway, the invention also provides a method of inhibiting the expression of these genes in a diseased cell.
- the gene can be one or a combination of: GH-I (e.g., GenBank Accession No. NM_005269), Gli-2 (e.g., GenBank Accession No. NM_005270), GIi-S (e.g., GenBank Accession No.
- the method of inhibiting the expression of these genes comprises contacting the diseased cell with any of the pharmaceutical compositions described herein in an amount effective to inhibit the expression of the gene.
- a cell e.g., a diseased cell
- a pharmaceutical composition comprising a nucleic acid or recombinant expression vector
- the method involves the expression of the nucleic acid such that the encoded polypeptide (or functional fragment or functional variant) is expressed inside of the cell.
- a cell e.g., a diseased cell
- a pharmaceutical composition comprising a host cell (or a population thereof)
- the method involves the expression of the nucleic acid inside of the host cell and the secretion of the encoded polypeptide (or functional fragment or functional variant) outside of the host cell where the polypeptide is then available to contact the diseased cell.
- This example demonstrates a method of preparing polypeptides (including functional fragments and functional variants) in accordance with an embodiment of the invention.
- Polypeptides having the amino acid sequences as set forth in Table 1 are synthesized by solid phase peptide synthesis on a 433 A Peptide Synthesizer (Applied Biosystems, Foster City, CA) equipped with a conductivity monitoring unit utilizing Fmoc amino acid derivatives (AnaSpec, San Jose, CA). The synthesis is performed with conditional blocking of unreacted amino groups with acetic anhydride for easier purification of the resulting peptides.
- Peptides are cleaved from the resin with 87.5% trifluoroacetic acid containing 5% water, 5% thioanisol and 2.5% triisopropyl-silane, precipitated with cold diethyl ether, washed five times with ether and dried in vacuum overnight.
- Peptides dissolved in dimethylformamide are purified by HPLC on a preparative (25x 250 mm) Atlantis Cl 8 reverse phase column (Agilent, Palo Alto, CA) in a gradient of 0.05 % trifluoroacetic acid in water and acetonitrile containing 0.05 % trifluoroacetic acid.
- the fractions are analyzed by electrospray LC/MS on Agilent 1100 series instrument (Agilent Technologies, Palo Alto, CA) with the use of Zorbax 300SB-C18 Poroshell column and a gradient of 5% acetic acid in water and acetonitrile. Only fractions containing more than 95% pure product are combined and freeze-dried. Peptides are dried from 5% acetic acid to ensure conversion into acetate salts. The purity and structure are further confirmed by LC/MS with separation on Zorbax 300SB-C18 analytical column.
- Sequence X is selected from the group consisting of Ac-LAKFSTHWAYTL (all-D) (SEQ ID NO: 85); Ac-AKFSTHWAYTL (AIl-D) (SEQ ID NO: 86); and Ac- KFSTHWAYTL (AIl-D) (SEQ ID NO: 87); wherein each of Linker 1 and Linker 2 is optionally present and each independently is GIy, beta- Ala, aminopropionic acid, gamma- aminobutyric acid, aminocaproic acid, or aminohexanoic acid; wherein n and m is between 0 and 6; wherein Y is K, C, homoCys, Orn, diaminopropanoic acid (DPA), diaminobutyric acid (DBA); and wherein the fatty acid is a stearic, palmitic, myristic, lauric, capric or caprilic acid.
- Sequence X is SEQ ID NO: 87, n is 4,
- the resulting resin is coupled to a linker amino acid (e.g., Fmoc-Gly, beta- Ala, aminopropionic acid, gamma-aminobutyric acid, aminocaproic acid, or aminohexanoic acid) on an AB 1433 peptide synthesizer.
- linker amino acid e.g., Fmoc-Gly, beta- Ala, aminopropionic acid, gamma-aminobutyric acid, aminocaproic acid, or aminohexanoic acid
- the remainder of each Sequence X is simultaneously built on a peptide synthesizer using a standard synthetic protocol.
- the dimeric product is cleaved, deprotected and purified as in a standard synthetic protocol.
- SMOi2-56 which is the dimeric form of SMOi2-17, is made in this manner.
- SMOi2-29 and -30 are peptides based on SMOi2-9 fused to penetratin, which is a peptide from Antennapedia used to introduce a variety of biologically active molecules, such as DNA, peptides, or proteins into cells (Granier et al., J Biol Chem. 279: 50904-50914 (2004)).
- Penetratin has the amino acid sequence RQIKIWFPNRR-NIe-KWKK (SEQ ID NO: 78).
- Penetratin-containing peptides are made as a single peptide chain using standard peptide synthesis methods.
- the molecular mass of each peptide is determined by ion-spray mass spectrometry utilizing an Agilentl 100 LC/MS system (Agilent, Santa Clara, CA) and is shown in Tables 2 and 3.
- DU145 prostate cancer cells, PC3 prostate cancer cells, MCF7 breast cancer cells, or Mel-SK-2 melanoma cells are inoculated in 96 well plates at 200-400 cells/well density in DMEM medium containing 10% fetal bovine serum and allowed to attach for 24 hours. Cell suspension of 100 ⁇ l is used for each well. Polypeptides in 100 ⁇ l medium at 2X concentration are added the next day and kept in the CO 2 incubator for 48 hours While the polypeptides are added at a final concentration between 1 nM and 10 ⁇ M, assays are performed on extra reference plates to determine the cell population density at time 0 (7b).
- the cells are stained with Promega Non- Radioactive Cell Proliferation Assay Kit (MTT) according to manufacture's protocol.
- MTT Promega Non- Radioactive Cell Proliferation Assay Kit
- the absorbance of the wells is determined at 544 nm by a FLUOstar/POLARstar® Galaxy MicroplateReader (BMG Labtechnologies GmbH, Germany).
- the assays are performed on control (C) and test (T) cells.
- Cellular responses are calculated from the data using the following formula: 100 [(T - T 0 )Z(C - T 0 )] for T > T 0 and 100 [(T - T 0 )ZTo] for T ⁇ T 0.
- polypeptides in accordance with embodiments of the invention are able to inhibit proliferation of diseased cells.
- Polypeptides corresponding to the full lengths of all three intracellular loops of SMO (SMOil-1, SMOi2-l, SMOi3-l) having an N-terminal palmitoyl residue are constructed as described in Example 1.
- the polypeptides are then tested for toxicity (growth inhibition) as described in Example 2 using MCF-7 breast cancer cells and gastric adenocarcinoma cells.
- Activity of SMOi2-l and SMOi3-l is compared to that of cyclopamine (5 ⁇ M), a teratogen isolated from the corn lily Veratrum califonicum.
- cyclopamine (5 ⁇ M), a teratogen isolated from the corn lily Veratrum califonicum.
- SMOi3-l polypeptide has the most significant effect on cell growth, followed by SMO ⁇ 2-1, while SMOiI -1 demonstrates the least amount of inhibitory activity.
- SMOi3-l and SMOi2-l polypeptides are able to inhibit the growth of gastric adenocarcinoma cells as well or better than cyclopamine.
- Polypeptides based on the second or third intracellular loop of SMO (SMOi2 or i3 polypeptides) (as shown in Table 1) are synthesized as described in Example 1 and are tested as described in Example 2 using MCF-7 breast cancer cells or SK-Mel2 melanoma cells.
- the IC 50 of each peptide as determined by the MTT assay in SK-Mel2 melanoma cells after 48 hour exposure to the peptide is shown in Tables 4 and 5.
- polypeptides based on the third intracellular loop of SMO exhibit the ability to inhibit the growth of MCF-7 cells. Also, peptides corresponding to fragments of the third intracellular loop have activities that are comparable or lower than the full-length loop (SMOi3-l).
- C-terminal truncation of the second intracellular loop yields polypeptides that were significantly more toxic to cancer cells than the full-length loop (SMOi2-l). Both halves of the loop when palmitoylated at the amino acids which are positioned at the end of the loop (which end is adjacent to the membrane in the wild-type SMO protein) are active. However, C-terminal extension of the N-terminal half lowers the activity of the most potent 12-residue long polypeptide (compare peptides SMOi2-8 with SMOi2-6 and SMOi2-3).
- SMOi2-9 is fused to penetratin. Neither C-terminal nor N-terminal fusion helps to restore the activity, suggesting that palmitoylation provides more than just cell permeability. Also, the replacement of palmitoyl residue with sequences of the transmembrane domain of the SMO protein does not overcome the loss of activity (SMOi2-14 and SMO ⁇ 2-15). The lack of activity may be due to the fact that these polypeptides have poor solubility. Substitution of palmitoyl residue with slightly shorter myristoyl resulted in 2.5-fold less potent compound (SMOi2-26).
- SMOi2 polypeptides exhibit inhibitory activity.
- SMOi2-16 which is the retroinverso analogue of SMOi2-8, and its truncated version SMOi2-17, which is the retroinverso analogue of SM0i2-l 1 (and SMOi2-12), are more potent in inhibiting and killing melanoma cells than their all-L parent polypeptide ( Figures 4 and 7).
- SMOi2-16 which is the retroinverso analogue of SMOi2-8, and its truncated version SMOi2-17, which is the retroinverso analogue of SM0i2-l 1 (and SMOi2-12)
- SMOi2-12-17 which is the retroinverso analogue of SM0i2-l 1 (and SMOi2-12)
- This example demonstrates a method of inhibiting the gene expression of Hedgehog signaling pathway proteins in cells in accordance with an embodiment of the invention.
- DU 145 cells were treated by 5 ⁇ M and 10 ⁇ M of SMOi2-l for 24 h only.
- the control was DU 145 cells without compounds- treatment.
- the 5 ⁇ M of cyclopamine was always used as positive control in all experiments.
- Total cellular RNA was isolated, and further purified by RNeasy® columns (QIAGEN, Valencia, CA) according to the manufacturer's instructions. RNA quality and quantity were dete ⁇ riined using Agilent RNA 6000 Nano Chip (Agilent Technologies, Inc., CA). cDNA synthesis was carried out using Random Hexamer primer, TaqMan® Reverse Transcription Reagents kit (Applied Biosystems, Foster, CA).
- Example 2 1 and tested as described in Example 2 using SK-Mel2 cells. Cells are exposed to polypeptides or peptidomimetics for 60 hours.
- Uncorrected fluorescence emission spectra are obtained at 25 0 C on a Single Photon Counting Spectrofluorometer FLUOROMAX®-2 (Horiba Jobin Yvon, Edison, NJ).
- the excitation and emission monochromator slits are adjusted to 1.5 and 3.5 nm bandwidth, respectively.
- the emission spectra (increment 1 nm, integration time 0.2 sec.) are collected at the range 450-700 nm, using 430 nm excitation monocliromator setting.
- the fluorometric measurements are performed for premixed aliquots of peptide and imidazoacridone solutions.
- the concentration of fluorescing agent WMC-77 in all probes is 0.4 ⁇ M.
- the fluorescence data are presented in Figure 8.
- the increase of peptide/fluorophore ratio causes the permanent increase of WMC-77 fluorescence emission intensity, leveling of at ⁇ 2 ⁇ M.
- the changes in the fluorescence signal are similar to those observed during transfer of imidazoacridones from aqueous to non-polar media such as organic solvents (Tarasov et al., 1999, supra), to the cores of classic surfactant micelles (Tarasov et al., 1999, supra) or upon binding to DNA (Tarasov et al., 2003, supra).
- the critical micelle concentration estimated as described in (Tanford, The Hydrophobic Effect: Formation of Micelles and Biological Membranes, John Wiley & Sons, New York (1980)), is determined as 0.5 - 1 ⁇ M of SMOi2-8.
- peptides of the invention have secondary structure.
- the peptides are measured by circular dichroism (CD) spectroscopy.
- Peptide solutions (1 ⁇ M) are prepared by dissolving compounds in PBS containing 50 niM dodecylphophocholine (Avanti Polar Lipids, Alabaster, AL).
- CD spectra are recorded by an AVIV mod.
- 202 CD-spectrometer (Aviv Instruments, Lakewood, NJ) using 0.1 cm path length quartz cuvette at 22-24 0 C. Scan ranges are between 180 and 260 nm and the spectrum of the buffer is subtracted from the spectrum of the compound.
- the Lys residue at the 10th position of SMOi2-8 is critical for the activity of the SMOi2-8 peptide. Significant loss in activity also is observed upon substitution of the Ser at position 8 of SMOi2-8. Activity increased when the Leu at position 1 was replaced with Ala. The Phe at position 9, Tyr at position 3, and Trp at position 5 can be substituted with Ala without significant change in the activity. The remaining substitutions (2, 4, 6, 7, 11, and 12) result in a slight (40-60%) increase in GI 50.
Abstract
Description
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US13/956,628 US20130316957A1 (en) | 2006-10-31 | 2013-08-01 | Smoothened polypeptides and methods of use |
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EP2078036A2 (en) | 2009-07-15 |
PH12013502425B1 (en) | 2014-10-27 |
CN101616931A (en) | 2009-12-30 |
ZA200902894B (en) | 2010-04-28 |
AU2007329678A1 (en) | 2008-06-12 |
JP2010508305A (en) | 2010-03-18 |
MY181496A (en) | 2020-12-23 |
JP5399255B2 (en) | 2014-01-29 |
JP2013255500A (en) | 2013-12-26 |
US20100093625A1 (en) | 2010-04-15 |
US20130316957A1 (en) | 2013-11-28 |
CN101616931B (en) | 2013-08-21 |
SG175691A1 (en) | 2011-11-28 |
WO2008070357A9 (en) | 2008-08-14 |
JP2015180630A (en) | 2015-10-15 |
US8546524B2 (en) | 2013-10-01 |
JP5739484B2 (en) | 2015-06-24 |
KR20090084839A (en) | 2009-08-05 |
KR101563010B1 (en) | 2015-10-26 |
PH12013502425A1 (en) | 2014-10-27 |
CA2667821A1 (en) | 2008-06-12 |
WO2008070357A3 (en) | 2009-02-26 |
US20120282196A1 (en) | 2012-11-08 |
MY149170A (en) | 2013-07-31 |
CN103435694A (en) | 2013-12-11 |
US8198402B2 (en) | 2012-06-12 |
SG178743A1 (en) | 2012-03-29 |
EP2431388A1 (en) | 2012-03-21 |
HK1137031A1 (en) | 2010-07-16 |
NZ576467A (en) | 2012-03-30 |
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