WO2000012548A1 - Nucleic acid and polypeptide p10 of a borna disease virus (bdv) and their use for diagnostic and immunization purposes - Google Patents
Nucleic acid and polypeptide p10 of a borna disease virus (bdv) and their use for diagnostic and immunization purposes Download PDFInfo
- Publication number
- WO2000012548A1 WO2000012548A1 PCT/US1999/019227 US9919227W WO0012548A1 WO 2000012548 A1 WO2000012548 A1 WO 2000012548A1 US 9919227 W US9919227 W US 9919227W WO 0012548 A1 WO0012548 A1 WO 0012548A1
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- WIPO (PCT)
- Prior art keywords
- polypeptide
- nucleic acid
- bdv
- present
- specific binding
- Prior art date
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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
- C07K14/005—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from viruses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2770/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA ssRNA viruses positive-sense
- C12N2770/00011—Details
- C12N2770/00022—New viral proteins or individual genes, new structural or functional aspects of known viral proteins or genes
Definitions
- the Borna Disease virus is an enveloped, negative sense, nonsegmented, single- stranded RNA virus which causes Borna Disease (BD), a transmissible polioencephalomyelitis, in susceptible animals.
- BD Borna Disease
- the Borna Disease was originally described in horses and sheep, but cattle, rabbits, goats, deer, llamas, alpacas, cats and ostriches can also be naturally infected. Recent reports indicate that the BDV also can infect humans.
- the virus can be isolated from the naturally infected hosts. The isolates from different species exhibit high degrees of homology, but it is not clear whether they are the same virus originally described as the causative agent of BD in horses or they are closely related viruses. However, viral proteins from one isolate can react with BDV-specific antibodies in the serum of another species, and vice versa.
- the BDV is strictly neurotropic and is disseminated by intra-axonal transport from the site of infection, for example through the olfactory nerve, or other cerebral nerve endings terminating in the mucous membrane of the oropharyngeal region.
- the virus localizes preferentially in certain parts of the brain such as the grey matter, nucleus niger, hippocampus or olfactory bulb, and may spread centrifugally to the peripheral nerves whereby the virus can reach the ganglia of some organs. Involvement of certain regions of the brain may give certain focal symptoms, for example involvement of the nucleus niger may explain the appearance of motor disorder.
- the clinical expression of BDV and BDV-related infection is variable and is dependent on the virus strain and the species infected.
- FIG. 1 depicts the identification of the recombinant GST-BDV plO fusion protein by serum from a rabbit infected with BDV from horse.
- FIG.2 depicts the nucleotide sequence of ORFxl-FLAG DNA fragment (SEQ ID NO:
- the underlined nucleotides represents the FLAG moiety, not underlined section is the sequence of ORFxl .
- the not underlined section is provided as SEQ ID NO:7 and is part of the present invention.
- FIG.4 depicts the specificity of the anti-BDV polypeptide p 10 rabbit antiserum to a BDV polypeptide plO.
- Total protein cell-free lysate from the rat glial cell C6 (ATCC accession number CCL- 107) (lanes 1 and 2) and from the BDV-infected C6BV cells (lanes 3 and 4) were tested by western blot against sera collected from a rabbit before immunization (lanes 1 and 3) and after immunization (lanes 2 and 4) with the affinity column-purified GST-BDV polypeptide plO fusion protein.
- a protein band with an apparent molecular weight of approximately 10 kilodalton was identified by the immune serum in the protein sample from the infected cells.
- FIG. 5A, FIG. 5B, FIG. 5C and FIG. 5D depict the specificity of the anti-BDV polypeptide plO rabbit antiserum to BDV.
- the Madin-Darby canine kidney cells MDCK (ATCC accession number CCL-34) infected (panels A and C) and not infected (panels B and D) with BDV were stained in immunofluorescence assays (IF A) by the anti-BDV polypeptide plO rabbit serum (panels A and B) prepared as described in Example 3, and previously tested as shown in FIG. 4. Only the infected cells were stained (panel A). The staining was observed in the nucleus and in the cytoplasm of the infected cells. The preimmune serum did not stain the infected (panel C) or the non-infected (panel D) cells.
- FIG. 7 depicts the detection of anti-BDV polypeptide plO antibodies in serum from a
- FIG.8 depicts the detection of anti-BDV antibodies in serum from a BDV-infected horse.
- Affinity column-purified GST protein (lanes 3 and 6), GST-BDV polypeptide p 10 fusion protein (lanes 1 and 4) and GST-BDV p24 fusion protein (lanes 2 and 5) were used as antigen substrates in western blot to test for antigen-specific antibodies in sera from horses naturally infected (lanes 1 , 2 and 3) and not infected (lanes 4, 5 and 6) with BDV.
- the GST-BDV polypeptide pi 0 fusion protein detected anti-BDV polypeptide plO specific antibodies in serum of the infected horse.
- FIG. 9 depicts the subcellular localization of polypeptide plO in BDV-infected cells.
- Antiserum specific for polypeptide plO was used to stain C6BV (FIG. 9A) and C6 (FIG. 9B) cells via IFA.
- C6BV (FIG. 9C) and C6 (FIG. 9D) cells were also stained with prebleed serum as a control.
- the FITC-co ⁇ jugated protein A was used as a second antibody.
- the stained cells were examined using an epifluroescence microscope at 160X magnification. The staining was observed in the nucleus and in the cytoplasm of the infected cells.
- the BDV has not been fully characterized, but overlapping nucleic acid fragments of its genome have been cloned from cells infected by cell-adapted BDV strains. These cell- adapted BDV nucleic acid fragments of its genome had been sequenced to give the complete nucleic acid sequence of the genome (Briese, Proc. Natl. Acad. Sci. USA 91 :4362 (1994); Cubitt, J. Virol. 68:1382 (1994)). It is possible to translate the BDV genomic nucleotide sequence into amino acids. From the amino acid sequence, one may predict the number of open reading frames (ORFs) encoding hypothetical proteins.
- ORFs open reading frames
- a second aspect of the present invention is a specific binding member, such as an antibody or polypeptide p40 or polypeptide p24, that binds with at least a portion of a polypeptide pi 0 of a Borna Disease Virus.
- a third aspect of the present invention is a nucleic acid molecule that encodes a polypeptide having at least one bioactivity of a polypeptide of a Borna Disease Virus.
- a fourth aspect of the present invention is a test kit that includes at least one of: a polypeptide of the present invention, a specific binding member of the present invention or a nucleic acid molecule of the present invention.
- a fifth aspect of the present invention is a vaccine and method of immunization that includes at least one of: a polypeptide of the present invention, a specific binding member of the present invention or a nucleic acid molecule of the present invention.
- a sixth aspect of the present invention is a method of diagnosis that includes at least one of: a polypeptide of the present invention, a specific binding member of the present invention or a nucleic acid molecule of the present invention.
- a seventh aspect of the present invention is a method of identifying test compounds or bioactivities, preferably test compounds or bioactivities that are useful in the present invention.
- isolated polynucleotide refers to a polynucleotide of genomic, cDNA, or synthetic origin, or some combination thereof, which by virtue of its origin, the isolated polynucleotide (1) is not associated with the cell in which the isolated polynucleotide is found in nature, or (2) is operably linked to a polynucleotide that it is not linked to in nature.
- the isolated polynucleotide can optionally be linked to promoters, enhancers, or other regulatory sequences.
- isolated protein or “isolated polypeptide” refers to a protein or polypeptide of DNA, cDNA, RNA, recombinant RNA, recombinant DNA or synthetic origin, or some combination thereof, which by virtue of its origin the isolated protein or isolated polypeptide (1) is not associated with proteins normally found within nature, or (2) is isolated from the cell in which it normally occurs, or (3) is isolated free of other proteins from the same cellular source, for example, free of cellular proteins), or (4) is expressed by a cell from a different species, or (5) does not occur in nature.
- Naturally occurring refers to the fact that an object can be found in nature.
- a polypeptide or polynucleotide sequence that is present in an organism, including viruses, that can be isolated from a source in nature and which has not been intentionally modified by man in the laboratory is naturally occurring.
- control sequences refer to polynucleotide sequences that effect the expression of coding and non-coding sequences to which they are ligated. The nature of such control sequences differs depending upon the host organism; in prokaryotes, such control sequences generally include promoter, ribosomal biding site, and transcription termination sequences; in eukaryotes, generally, such control sequences include promoters and transcription termination sequences.
- the term control sequences is intended to include components whose presence can influence expression, and can also include additional components whose presence is advantageous, for example, leader sequences and fusion partner sequences.
- Polynucleotide refers to a polymeric form of nucleotides of a least ten bases in length, either ribonucleotides or deoxynucleotides or a modified from of either type of nucleotide.
- the term includes single and double stranded forms of DNA or RNA.
- Directly in the context of a biological process or processes, refers to direct causation of a process that does not require intermediate steps, usually caused by one molecule contacting or binding to another molecule (the same type or different type of molecule). For example, molecule A contacts molecule B, which causes molecule B to exert effect X that is part of a biological process.
- Sequence homology refers to the proportion of base matches between two nucleic acid sequences or the proportion of amino acid matches between two amino acid sequences. When sequence homology is expressed as a percentage, for example 50%, the percentage denotes the proportion of matches of the length of sequences from a desired sequence that is compared to some other sequence. Gaps (in either of the two sequences) are permitted to maximize matching; gap lengths of 15 bases or less are usually used, 6 bases or less are preferred with 2 bases or less more preferred.
- the sequence homology between the target nucleic acid and the oligonucleotide sequence is generally not less than 17 target base matches out of 20 possible oligonucleotide base pair matches (85%); preferably not less than 9 matches out of 10 possible base pair matches (90%), and most preferably not less than 19 matches out of 20 possible base pair matches (95%).
- “Selectively hybridize” refers to detectably and specifically bind. Polynucleotides, oligonucleotides and fragments thereof selectively hybridize to target nucleic acid strands, under hybridization and wash conditions that minimize appreciable amounts of detectable binding to nonspecific nucleic acids.
- nucleic acid sequence homology between the polynucleotides, oligonucleotides, and fragments thereof and a nucleic acid sequence of interest will be at least 30%, and more typically and preferably of at least 40%, 50%, 60%, 70%, 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99%.
- Hybridization and washing conditions are typically performed at high stringency according to conventional hybridization procedures. Positive clones are isolated and sequenced.
- a full length polynucleotide sequence can be labeled and used as a hybridization probe to isolate genomic clones from an appropriate target library as they are known in the art.
- Typical hybridization conditions and methods for screening plaque lifts and other purposes are known in the art (Benton and Davis, Science 196:180 (1978); Sambrook et al., supra, (1989)).
- Two amino acid sequences are homologous if there is a partial or complete identity between their sequences. For example, 85% homology means that 85% of the amino acids are identical when the two sequences are aligned for maximum matching. Gaps (in either of the two sequences being matched) are allowed in maximizing matching; gap lengths of 5 or less are preferred with 2 or less being more preferred.
- two protein sequences are homologous, as this term is used herein, if they have an alignment score of at least 5 (in standard deviation units) using the program ALIGN with the mutation data matrix and a gap penalty of 6 or greater (Dayhoff, in Atlas of Protein Sequence and Structure, National Biomedical Research Foundation, volume 5, pp. 101-110 (1972) and Supplement 2, pp. 1-10).
- the two sequences or parts thereof are more preferably homologous if their amino acids are greater than or equal to
- a reference sequence is a defined sequence used as a basis for a sequence comparison; a reference sequence can be a subset of a larger sequence, for example, as a segment of a full length cDNA or gene sequence given in a sequence listing, or may comprise a complete cDNA or gene sequence. Generally, a reference sequence is at least 20 nucleotides in length, frequently at least 25 nucleotides in length, and often at least
- a comparison widow refers to a conceptual segment of at least 20 contiguous nucleotide positions wherein a polynucleotide sequence may be compared to a reference sequence of at least 20 contiguous nucleotides and wherein the portion of the polynucleotide sequence in the comparison window can comprise additions and deletions (for example, gaps) of 20 percent or less as compared to the reference sequence (which would not comprise additions or deletions) for optimal alignment of the two sequences.
- Optimal alignment of sequences for aligning a comparison window can be conducted by the local homology algorithm (Smith and Waterman, Adv. Appl. Math., 2:482 (1981)), by the homology alignment algorithm (Needleman and Wunsch, J. Mol. Bio., 48:443 (1970)), by the search for similarity method (Pearson and Lipman, Proc. Natl. Acid. Sci. U.S.A.
- sequence identity means that two polynucleotide sequences are identical (for example, on a nucleotide-by -nucleotide basis) over the window of comparison.
- Percentage of sequence identity is calculated by comparing two optimally aligned sequences over the window of comparison, determining the number of positions at which the identical nucleic acid base occurs in both sequences to yield the number of matched positions, dividing the number of matched positions by the total number of positions in the window of comparison (for example, the window size), and multiplying the result by 100 to yield the percentage of sequence identity.
- Substantial identity denotes a characteristic of a polynucleotide sequence, wherein the polynucleotide comprises a sequence that has at least about 30 percent to about 70 percent sequence identity; preferably at least about 60 % to about 90 % sequence identity; more usually at least about 91 %, at least about 92 %, at least 93 %, at least about 94 %, at least about 95 %, at least about 96 %, at least about 97 %, at least about 98 % or at least about 99 % sequence identity as compared to a reference sequence over a comparison window of at least 20 nucleotide positions, frequently over a window of at least 25 to 50 nucleotides, wherein the percentage of sequence identity is calculated by comparing the reference sequence to the polynucleotide sequence that may include deletions or addition which total 20 percent or less of the reference sequence over the window of comparison.
- Constant amino acid substitutions refer to the interchangeability of residues having similar side chains.
- a group of amino acids having aliphatic side chains is gly cine, alanine, valine, leucine, and isoleucine; a group of amino acids having aliphatic-hydroxyl side chains is serine and threonine; a group of amino acids having amide-containing side chains is asparagine and glutamine; a group of amino acids having aromatic side chains is phenylalanine, tyrosine and tryptophan; a group of amino acids having basic side chains is lysine, arginine and histidine; a group of amino acids having acidic side chains is aspartic acid and glutamic acid; and a group of amino acids having sulfur-containing side chan is cystein and methionine.
- Preferred conservative amino acid substitution groups are: valine-leucine-isoleucine; phenylalanine- tyrosine; lysine-arginine; alanine-valine; glutamate-aspartate; and asparagine-glutamine.
- Modulation refers to the capacity to either enhance or inhibit a functional property of a biological activity or process, for example, enzyme activity or receptor binding. Such enhancement or inhibition may be contingent on the occurrence of a specific event, such as activation of a signal transduction pathway and/or may be manifest only in particular cell types.
- Module refers to a chemical (naturally occurring or non-naturally occurring), such as a biological macromolecule (for example, nucleic acid, protein, non-peptide or organic molecule) or an extract made from biological materials, such as prokaryotes, bacteria, eukaryotes, plants, fungi, multicellular organisms or animals, invertebrates, vertebrates, mammals and humans, including, where appropriate, extracts of: whole organisms or portions of organisms, cells, organs, tissues, fluids, whole cultures or portions of cultures, or environmental samples or portions thereof.
- a biological macromolecule for example, nucleic acid, protein, non-peptide or organic molecule
- an extract made from biological materials such as prokaryotes, bacteria, eukaryotes, plants, fungi, multicellular organisms or animals, invertebrates, vertebrates, mammals and humans, including, where appropriate, extracts of: whole organisms or portions of organisms, cells, organs, tissues, fluids, whole cultures or portions of cultures, or environmental samples
- Modulators are typically evaluated for potential activity as inhibitors or activators (directly or indirectly) of a biological process or processes (for example, agonist, partial antagonist, partial agonist, antagonist, antineoplastic, cytotoxic, inhibitors of neoplastic transformation or cell proliferation, cell proliferation promoting agents, antiviral agents, antimicrobial agents, antibacterial agents, antibiotics, and the like) by inclusion in assays described herein.
- a biological process or processes for example, agonist, partial antagonist, partial agonist, antagonist, antineoplastic, cytotoxic, inhibitors of neoplastic transformation or cell proliferation, cell proliferation promoting agents, antiviral agents, antimicrobial agents, antibacterial agents, antibiotics, and the like.
- the activity of a modulator may be known, unknown or partially known.
- Test chemical refers to a chemical or extract to be tested by at least one method of the present invention to be a putative modulator.
- a test chemical is usually not known to bind to the target of interest.
- Control test chemical or “control test compound” refers to a chemical known to bind to the target (for example, a known agonist, antagonist, partial agonist or inverse agonist).
- Test chemical does not typically include a chemical added to a mixture as a control condition that alters the function of the target to determine signal specificity in an assay.
- the concentration of test chemical used can be expressed on a weight to volume basis. Under these circumstances, the following ranges of concentrations can be used: between about 0.001 micrograms/ml and about 1 milligram/ml, preferably between about 0.01 micrograms/ml and about 100 micrograms/ml, and more preferably between about 0.1 micrograms/ml and about 10 micrograms/ml.
- a test chemical or test compound can have at least one bioactivity.
- Target refers to a biochemical entity involved in a biological process. Targets are typically proteins that play a useful role in the physiology or biology of an organism. A therapeutic chemical typically binds to a target to alter or modulate its function. As used herein, targets can include, but not be limited to, cell surface receptors, G-proteins, G-protein coupled receptors, kinases, phosphatases, ion channels, lipases, phosholipases, nuclear receptors, intracellular structures, tubules, tubulin, and the like.
- Label refers to incorporation of a detectable marker, for example by incorporation of a radiolabled compound or attachment to a polypeptide of moieties such as biotin that can be detected by the binding of a section moiety, such as marked avidin.
- a detectable marker for example by incorporation of a radiolabled compound or attachment to a polypeptide of moieties such as biotin that can be detected by the binding of a section moiety, such as marked avidin.
- Various methods of labeling polypeptide, nucleic acids, carbohydrates, and other biological or organic molecules are known in the art.
- Such labels can have a variety of readouts, such as radioactivity, fluorescence, color, chemiluminescence or other readouts known in the art or later developed.
- the readouts can be based on enzymatic activity, such as beta-galactosidase, beta-lactamase, horseradish peroxidase, alkaline phosphatase, luciferase; radioisotopes such as 3 H, 14 C, 35 S, 125 I or 131 I); fluorescent proteins, such as green fluorescent proteins; or other fluorescent labels, such as FITC, rhodamine, and lanthanides. Where appropriate, these labels can be the product of the expression of reporter genes, as that term is understood in the art. Examples of reporter genes are beta-lactamase (U.S. Patent No. 5,741,657 to Tsien et al., issued April 21, 1998) and green fluorescent protein (U.S. Patent No. 5,777,079 to Tsien et al., issued July 7, 1998; U.S. Patent No. 5,804,387 to Cormack et al., issued September 8, 1998).
- enzymatic activity such as beta-galact
- substantially pure refers to an object species or activity that is the predominant species or activity present (for example on a molar basis it is more abundant than any other individual species or activities in the composition) and preferably a substantially purified fraction is a composition wherein the object species or activity comprises at least about 50 percent (on a molar, weight or activity basis) of all macromolecules or activities present.
- object species or activity comprises at least about 50 percent (on a molar, weight or activity basis) of all macromolecules or activities present.
- as substantially pure composition will comprise more than about 80 percent of all macromolecular species or activities present in a composition, more preferably more than about 85%, 90%, 95% and 99%.
- the object species or activity is purified to essential homogeneity, wherein contaminant species or activities cannot be detected by conventional detection methods) wherein the composition consists essentially of a single macromolecular species or activity.
- an activity may be caused, directly or indirectly, by a single species or a plurality of species within a composition, particularly with extracts.
- a “bioactive compound” is a compound or composition that exhibits at least one of following bioactivities: antiviral activity, binding with p40 nucleoprotein N of a BDV, binding with the 24 kd viral phosphoprotein of a BDV, nuclear localization in a eukaryotic cell, at least one epitope, immunogenic activity, T-cell activating activity and antigenic activity.
- a bioactive compound is specific for a BDV, preferably a polypeptide p 10 of a BDV, such as, for example, for use as a therapeutic, diagnostic, vaccine or other aspect of the invention for a BDV, but that need not be the case.
- a “bioactive derivative” is a modification of a bioactive compound or bioactivity that retains at least one characteristic bioactivity of the parent compound.
- a “bioactive precursor” is a precursor of a bioactive compound or bioactivity that exhibits at least one characteristic activity of the resulting bioactive compound or bioactivity.
- a “specific binding member” refers to molecules that have specific binding activity towards a polypeptide of the present invention. Such specific binding members can take part in receptor-ligand type reactions and are generally characterized as binding with their binding mate by non-covalent reactions, such as hydrogen bonds, van der Walls interactions, hydrophobic interactions, and the like.
- a specific binding member can be at least a portion of a molecule, such as a protein, such as p40 nucleoprotein N of BDV or the 24 kd viral phosphoprotein P of BDV, that binds with a polypeptide of the present invention.
- a specific binding member can also be an immunoglobulin of any class, a polyclonal antibody, a monoclonal antibody, or an active fragment thereof.
- Binds with in the context of specific binding members, refers to the binding of one specific binding member with its target, such as an antibody binding with a polypeptide of the present invention, and does not infer that the specific binding member will not bind with moieties other than a polypeptide of the present invention.
- Specifically binds with refers to a specific binding member that detectably binds with a polypeptide of the present invention preferentially or with greater affinity than a moiety other than a polypeptide of the present invention.
- a specific binding member that specifically binds with one polypeptide of the present invention can also specifically bind with a second polypeptide of the present invention.
- Immunomobilized in the context of a test kit refers to a moiety attached to a surface such that the moiety remains substantially immobilized in an aqueous phase as opposed to being substantially mobile in an aqueous phase, such as, for example, in an immunochromatographic device and/or method.
- Vaccine refers to a composition or compound, that when administered to a subject in an appropriate dose by an appropriate route of administration and an appropriate regime, can prevent the likelihood of the occurrence of the infection or the severity of an infection with a BDV in a non-infected subject through a physiological response, such as an immune response.
- a vaccine also refers to a composition or compound that, when administered to a subject that has been exposed to a BDV in an appropriate dose by an appropriate route of administration and an appropriate regime, can reduce the likelihood of infection or reduce the severity of infection.
- a vaccine also refers to a compound or composition that, when administered to a subject that has become infected with a BDV in an appropriate dose by an appropriate route of administration and an appropriate regime, can reduce the severity of infection.
- Borna Disease Virus or “BDV” refers to a virus that is the etiological agent for "Borna
- Symptoms of the disease can also be monitored to follow the course of BD or a BDV-associated disease.
- Other technical terms used herein have their ordinary meaning in the art that they are used, as exemplified by a variety of technical dictionaries, such as the McGraw-Hill Dictionary of Chemical Terms and the Stedman's Medical Dictionary.
- a specific binding member such as an antibody, that binds with at least a portion of a polypeptide of a Borna Disease Virus
- nucleic acid molecule that encodes a polypeptide having at least one bioactivity of a polypeptide pi 0 of a Borna Disease Virus
- test kit that includes at least one of a polypeptide of 1), a specific binding member of 2) or a nucleic acid molecule of 3); 5) a vaccine and method of immunization that includes at least one of a polypeptide of 1), a specific binding member of 2) or a nucleic acid molecule of 3);
- a method of diagnosis including at least one of a polypeptide of 1), a specific binding member of 2) or a nucleic acid molecule of 3);
- test compound or bioactivity preferably test compounds or bioactivities that are useful in the present invention.
- One aspect of the present invention is a polypeptide, such as a substantially purified or purified polypeptide, having at least one bioactivity of a polypeptide pi 0 of a Borna Disease Virus (BDV).
- Bioactivities of a polypeptide of a BDV include, but are not limited to, immunogenic activity, antigenic activity, at least one epitope, localization in a eukaryotic cell, association with p40 nucleoprotein N of BDV and association with the 24 kd viral phosphoprotein P of BDV (see, for example, U.S. application No. 60/097,901 to Lai et al., filed August 26, 1998; Richt, EP 0791654A1, published August 27, 1997; Wehner et al., J. Gen. Virol. 78:2459-2466 (1997); Malik et al., Virology 258:65-72 (1999)).
- Such activities can be screened for, determined or confirmed using methods of the present invention or as they are known
- the polypeptide of the present invention can be encoded by portions of nucleic acid molecules that were not known to encode a polypeptide plO (see, for example, U.S. Patent No. 5,654,401 to Clements et al., issued August 5, 1997; Cubitt et al., J. Virol. 68:1382-1396 (1994); Schwemmie et al., J. Biol. Chem. 273:9007-9012 (1996); WO 96/21020 to Lipkin et al., published July 11, 1996; WO 98/30238 to de la Torre, published July 16, 1998).
- the regions of nucleic acid molecules that encode a polypeptide pi 0 or a polypeptide of the present invention can be identified by comparing the nucleic acid sequences of the present invention with nucleic acid molecules that are suspected to encode a polypeptide pi 0 or a polypeptide of the present invention.
- the structure of the open reading frame that encodes a polypeptide plO or polypeptide of the present invention as disclosed herein can be used to establish the activity of the encoded polypeptide.
- Isolated nucleic acid molecules that encode a polypeptide of the present invention but are not the full length nucleic acid molecule of a BDV or a cDNA copy thereof can be made using methods set forth in the Examples.
- the activity of the polypeptide can be confirmed by expressing the encoded polypeptide and confirming the activity thereof using methods of the present invention.
- the present invention includes polypeptides encoded by a nucleic acid that has substantial identity with at least a portion of such nucleic acid sequence, that selectively hybridizes with at least a portion of such nucleic acid sequence, or that encodes a conserved amino acid substitution relative to such nucleic acid sequence.
- the present invention also included polypeptides that have substantial identity with or have conservative amino acid substitutions relative to such nucleic acid sequences.
- a polypeptide of the present invention comprises at least one bioactivity of the polypeptide encoded by the nucleic acid sequence of SEQ ID NO:5, nucleic acid molecules that have substantial identity with at least a portion of the nucleic acid sequence of SEQ ID NO:5, nucleic acid molecules that selectively hybridizes with at least a portion of the nucleic acid sequence of SEQ ID NO: 5, and nucleic acid molecules that encode conservative amino acid substitutions of at least a portion of the nucleic acid sequence of SEQ ID NO:5.
- the polypeptide has a molecular weight of about 10 kd and is encoded by SEQ ID NO:5, but that need not be the case.
- the polypeptide of the present invention binds with at least one antibody that binds with a polypeptide pi 0 of a Borna Disease Virus, but that need not be the case.
- a polypeptide of the present invention includes at least a portion of the amino acid sequence of SEQ ID NO:6, has substantial identity with at least a portion of the amino acid sequence of SEQ ID NO:6, or has at least one conserved amino acid substitution of at least a portion of the amino acid sequence of SEQ ID NO:6.
- the polypeptide of the present invention binds with at least one antibody that binds with a polypeptide plO of a Borna Disease Virus.
- Polypeptides of the present invention can be made using recognized methods, such as by recombinant methods as they are known in the art (see, Sambrook et al., supra, (1989)) or by digesting proteins or polypeptides.
- nucleic acid molecules encoding or suspected of encoding a polypeptide of the present invention can be cloned into expression vectors that are transfected into appropriate host cells where the nucleic acid molecules are expressed.
- the resulting polypeptides can be optionally purified and their activity confirmed using methods of the present invention or as they are known in the art.
- the in vivo activity of polypeptides can be confirmed using methods of the present invention or as they are known in the art.
- the present invention also includes fusion proteins that include a polypeptide of the present invention.
- a polypeptide of the present invention can be fused with a polypeptide of interest, such as, for example, a tag such as an epitope tag (such as, for example FLAG) that allows the fusion protein to be readily purified, or a cellular localization sequence as they are known in the art to direct a polypeptide of the present invention to a selected cellular location, such as a membrane or nucleus.
- fusion proteins can be made using methods known in the art and as described herein, such as using molecular cloning methods (see, Sambrook et al., supra (1989)).
- a polypeptide of interest can be any polypeptide.
- the specific binding member can be any specific binding member, but is preferably at least a portion of an immunoglobulin, the p40 nucleoprotein N of a BDV, or the 24 kd viral phosphoprotein P of a BDV.
- immunoglobulins can be of any class or subclass of immunoglobulin and can be a polyclonal or monoclonal preparation, including monoclonal or polyclonal antibodies that specifically bind with a polypeptide of the present invention.
- Specific binding members of the present invention can be made and identified using methods known in the art.
- fragments of proteins such as the p40 protein or the phophoprotein P of a BDV can be made using recombinant methods or digestion of protein preparations. These fragments can be screened for their ability to bind and specifically bind with a polypeptide of the present invention using specific binding reactions as they are known in the art, such as using detectably labeled specific binding reagents and formats for receptor ligand interactions as they are known in the art.
- any appropriate method of making antibody preparations such as polyclonal and monoclonal antibody preparations, can be used such as they are known in the art (see, Harrow, Antibodies, a Laboratory Manual, Cold Spring Harbor Press (1988)).
- the binding of such antibody preparations to a polypeptide of the present invention can be screened, determined and confirmed using methods known in the art, such as using ELISAs or other appropriate formats known in the art (see, for example, direct non-competitive assays on a solid phase (U.S. Patent Nos. 4,187,075 and 4,497,900); Competitive binding on a solid phase (U.S. Patent Nos. 4,134,792, 4,478,946, 4,092,408, and 4,478,946); Sequential saturation (U.S.
- Patent Nos. 4,134,792, 4,271,140 Displacement or release assays (U.S. Patent Nos. 4,120,945, 4,256,725 and 4,434,236); One-site immunometric on solid phase (U.S. Patent Nos. 4,134,792 and 4,670,383); Sandwich assays (4,134,792 and 4,478,946)).
- III. A NUCLEIC ACID MOLECULE THAT ENCODES A POLYPEPTIDE HAVING AT LEAST ONE BIOACTIVITY OF A POLYPEPTIDE PlO OF A BORNA DISEASE VIRUS
- the present invention also includes a nucleic acid molecule, including a substantially purified or purified nucleic acid molecule, encoding a polypeptide comprising at least one bioactivity of a polypeptide pi 0.
- the nucleic acid molecule encodes at least a portion of the amino acid sequence of SEQ ID NO: 6 or SEQ ID NO: 8 and includes at least a portion of the nucleic acid sequence of SEQ ID NO:5 or SEQ ID NO:7.
- Such nucleic acid molecules can be DNA, RNA, single stranded, double stranded, or any combination thereof.
- the nucleic acid molecule of the present invention also includes nucleic acid molecules that selectively hybridize with at least a portion of the nucleic acid sequence of
- the nucleic acid molecule of the present invention encodes the full length sequence of SEQ ID NO: 6 or a substantial portion thereof and is encoded by the nucleic acid sequence of SEQ ID NO:5 or a substantial portion thereof, such that a polypeptide resulting from the expression of the nucleic acid molecule would have a molecular weight between about 9.5 kd and about 10.5 kd.
- the nucleic acid molecule encodes a polypeptide that binds with, and preferably specifically binds with, at least one specific binding member that binds with a polypeptide plO of a Borna Disease Virus.
- a nucleic acid molecule of the present invention can also be a portion of nucleic acid molecules that were not known to encode a polypeptide plO (see, for example, U.S. Patent No. 5,654,401 to Clements et al., issued August 5, 1997; Cubitt et al., J. Virol. 68:1382-1396 (1994); Schwemmie et al, J. Biol. Chem.
- Regions of nucleic acid molecules that encode a polypeptide pi 0 or a polypeptide of the present invention can be identified by comparing the nucleic acid sequences of the present invention with nucleic acid molecules that are suspected to encode a polypeptide pi 0 or a polypeptide of the present invention.
- the structure of the open reading frame that encodes a polypeptide plO or polypeptide of the present invention as disclosed herein can be used to establish the activity of the encoded polypeptide.
- Isolated nucleic acid molecules that encode a polypeptide of the present invention but are not the full length nucleic acid molecule of a BDV or a cDNA copy thereof can be made using methods set forth in the Examples.
- the activity of the polypeptide can be confirmed by expressing the encoded polypeptide and confirming the activity thereof using methods of the present invention.
- the present invention includes nucleic acid molecules that have substantial identity with at least a portion of such nucleic acid sequence, that selectively hybridizes with at least a portion of such nucleic acid sequence, or that encode a conserved amino acid substitution relative to such nucleic acid sequence.
- nucleic acid molecules of the present invention examples include SEQ ID NO:9 (portion of accession number gb/L27077/BDVSEQ, Cubitt et al., J. Virol. 68:1382-1396 (1994)), SEQ ID NO:10 (portion of accession number dbj/D10473/BDVP24, Richt et al. J. Gen. Virol. 72 (Pt. 9) 2251-2255 (1991)), SEQ ID NO: 11 (portion of accession number gb/S62821/S62821, Pyper et al. Virology 195:229-238
- nucleic acid molecules can be in any form, such as in a plasmid or in a linear form.
- the nucleic acid molecule of the present invention can be provided in a vector.
- vectors include plasmids and linear molecules or can be provided in a viral vector as they are known in the art and appropriate for a cell to be transfected, such as, for example, a phage, cosmid, retrovirus, vaccinia, adenovirus or adenoassociated virus.
- nucleic acid molecules with or without expression control sequences and present or not present in a vector, can be inserted into a cell using established methods.
- Such nucleic acid molecules can be extrachromosomal or be integrated into the genome of the cell.
- viral vectors can introduce nucleic acid molecules into a cell as part of their routine biology. Lipofection, microbalistics and electroporation can also be used to introduce nucleic acid molecules into a cell.
- certain cells in particular muscle cells and epidermal cells, especially in vivo, can routinely take up and express naked nucleic acid molecules.
- the cell does not normally include a nucleic acid molecule of the present invention or express a polypeptide of the present invention, but that need not be the case.
- a cell that expresses a relatively low amount of a polypeptide of the present invention can be made to express relatively higher amounts of a polypeptide once transfected with a nucleic acid of the present invention.
- Cells that express a polypeptide of the present invention can be screened for and selected using a variety of methods, including those set forth in the present invention. For example, immunoassays, such as western blots, can be used to identify cell lysates that include a polypeptide of the present invention.
- immunocytochemistry can be used to identify and localize a polypeptide of the present invention on or within a cell.
- in situ hybridization method such as FISH
- FISH in situ hybridization method
- test kits that can be used to detect a polypeptide, specific binding member or nucleic acid molecule of the present invention.
- the test kits can be used to determine whether a subject has been exposed to, infected with or vaccinated against a BDV.
- test kit for detecting specific binding members that bind with a polypeptide of the present invention that are useful, for example, for detecting BDV infection, exposure or vaccination in a subject.
- the test kit can have any number of reagents and hardware, but preferably comprises at least one polypeptide of the present invention, wherein said polypeptide can be provided immobilized on a solid support or not so immobilized.
- a variety of specific binding reaction formats are known in the art, many of which use detectably labeled specific binding reagents, such as detectably labeled antibodies or antigens. Such formats are represented by the following: Direct non-competitive assay on a solid support (U.S. Patent Nos. 4,187,075 and 4,497,900); Competitive binding of a solid support (U.S. Patent Nos. 4,134,792, 3,654,090, 4,478,946, 4,092,408, 4,478,946, , 4,271,140,
- the cell When immobilized, the cell can be immobilized using a variety of methods, such as fixing, entrapment (such as in a filter) or on a surface coated with a substance that attaches cells (such as fibronectin or other extracellular matrix protein or polypeptides).
- the test kit of the present invention can also include at least one specific binding reagent, such as an antibody or antigen, that is useful in the present invention.
- the at least one specific binding reagent is preferably an antibody and can be detectably labeled.
- Such specific binding reagents can be used to detect the binding of antigen to antibody in a variety of formats that use indirect or direct detection methods, such as a detectably labeled anti- antibody used in an indirect immunoassay.
- Test kits of the present invention can also include additional reagents and hardware that can be used to practice the invention.
- a test kit can include a housing to hold a chromatographic test strip and can also provide instructions for use of the test kit, preferably to perform at least one method of the present invention. Such instructions can be in such detail and language as appropriate for the intended operator of the test kit. Such instructions can be provided as a separate item, or be provided on or within a container.
- the test kit can be provided in one or more containers, including a container useful for packaging, transport and marketing.
- the test kit can be provided in a variety of packaging formats, including hermetically sealed containers to aid in preserving the integrity and activity of elements of a test kit, such as a test strip, or reagents of the present invention.
- test kit for detecting polypeptides that bind with a specific binding member of the present invention (such as an antibody) that are useful, for example, for detecting infection with, exposure to or vaccination against a BVD in a subject, including but not limited to BD, BDV infection, BDV-related infection and BDV- associated disease.
- the test kit can have any number of reagents and hardware, but preferably comprises at least one specific binding member of the present invention, wherein said specific binding member can be provided immobilized on a solid support or not so immobilized.
- the kit of the present invention can take any appropriate configuration that uses a specific binding member to detect polypeptides that bind thereto.
- a specific binding member of the present invention can be immobilized on a solid support, this combination being useful in an appropriate specific binding assay.
- the specific binding member can be immobilized to beads (such as latex or magnetic), bibulous structures (such as filter paper), membrane structure (such as nitrocellulose or a variety of polymers) or solid platform.
- the beads When the specific binding member is immobilized on beads, the beads can be used in an agglutination specific binding assay as they are known in the art.
- the specific binding member When the specific binding member is immobilized on a bibulous structure or membrane structure, this bibulous structure or membrane structure can be used in an chromatographic type specific binding assay as they are known in the art.
- This type of assay format is well known in the art and forms the basis of a variety of immunodiagnostics, such as the well-known pregnancy tests.
- a solid platform such as a solid platform that comprises at least one polymer (such as polystyrene), such as a multi-well platform, such as a microtiter plate
- this structure can be used to perform a variety of specific binding reactions, such as immunoassays, as they are known in the art.
- a variety of specific binding reaction formats are known in the art, many of which use detectably labeled specific binding reagents, such as detectably labeled antibodies or antigens. Such formats are represented by the following: Direct non-competitive assay on a solid support (U.S. Patent Nos. 4,187,075 and 4,497,900); Competitive binding of a solid support (U.S. Patent Nos. 4,134,792, 3,654,090, 4,478,946, 4,092,408, 4,478,946, , 4,271,140,
- the test kit of the present invention can also include a second specific binding reagent, such as an antibody or an antigen, that is useful in the present invention.
- the second specific binding reagent is preferably and antibody or an antigen and can be detectably labeled.
- Such specific binding reagents can be used to detect the binding of antigen to antibody in a variety of formats that use indirect or direct detection methods, such as a detectably labeled antigen used in an a direct or indirect specific binding reaction.
- Test kits of the present invention can also include additional reagents and hardware that can be used to practice the invention.
- a test kit can include a housing to hold a chromatographic test strip and can also provide instructions for use of the test kit, preferably to perform at least one method of the present invention. Such instructions can be in such detail and language as appropriate for the intended operator of the test kit. Such instructions can be provided as a separate item, or be provided on or within a container.
- the test kit can be provided in one or more containers, including a container useful for packaging, transport and marketing.
- the test kit can be provided in a variety of packaging formats, including hermetically sealed containers to aid in preserving the integrity and activity of elements of a test kit, such as a test strip, including reagents of the present invention.
- test kit for detecting a nucleic acid molecule of the present invention that is useful, for example, for detecting infection with, exposure to or vaccination against a BDN in a subject, including but not limited to BD, BDN infection, BDN-related infection or BDN-associated disease.
- the test kit can have any number of reagents and hardware, but preferably comprises at least one nucleic acid molecule of the present invention, wherein the nucleic acid molecule can be provided immobilized on a solid support or not so immobilized.
- the kit of the present invention can take any appropriate configuration that uses a nucleic acid molecule to detect another nucleic acid molecule.
- nucleic acid molecules of the present invention can be immobilized on a solid support, this combination being useful in an appropriate hybridization assay.
- the nucleic acid molecule can be immobilized onto a variety of solid supports, such as membrane . structures (such as nitrocellulose or a variety of polymers such as with northern blot, Southern blot, dot-blot or slot-blot technologies), silicon (such as with gene chip technologies) or a solid platform.
- the nucleic acid molecules can be immobilized using methods known in the art for a particular solid substrate.
- Such immobilized nucleic acid molecules can take the form of an array and can be derived from cells infected with a BDN and/or cells not infected with a BDN in order to form the basis for differential display assays for BDN infections.
- a nucleic acid molecule used to detect the presence of another nucleic acid molecule can be detectably labeled with a variety of appropriate labels such that a hybridization event can be detected and monitored. Appropriate detectable labels and methods of labeling nucleic acid molecules with them are known in the art.
- the nucleic acid molecule either immobilized or not immobilized or detectably labeled or not detectably labeled, can be D ⁇ A or R ⁇ A.
- single stranded sense/antisense R ⁇ A can hybridize with single stranded antisense/sense R ⁇ A or single stranded antisense/sense D ⁇ A.
- single stranded sense/antisense D ⁇ A can hybridize with single stranded antisense/sense R ⁇ A or single stranded antisense/sense D ⁇ A.
- the present invention includes polymerase chain reaction (PCR) methods including RT-PCR that can be used to amplify and optionally detect a nucleic acid molecule of the present invention in a sample, such as in a cell.
- PCR methods including RT-PCR, as they are known in the art, use primers to amplify a target sequence.
- the primer sequences of the present invention, or primers that can function to selectively amplify a nucleic acid sequence of the present invention are considered part of the present invention.
- the confirmation of the operability of a set of PCR primers to amplify a target sequence can be made using established PCR methods and those set forth herein.
- Amplified target sequences can be detected directly using, for example, real-time quantitative PCR (Heid et al, Genome Res. 6:986-994 (1996); Gibson et al., Genome
- test kits of the present invention can also include additional reagents and hardware that can be used to practice the invention.
- a test kit can include a housing to hold a membrane that includes immobilized nucleic acid molecules and can also provide instructions for use of the test kit, preferably to perform at least one method of the present invention. Such instructions can be in such detail and language as appropriate for the intended operator of the test kit.
- test kit can be provided in one or more containers, including a container useful for packaging, transport and marketing.
- the test kit can be provided in a variety of packaging formats, including hermetically sealed containers to aid in preserving the integrity and activity of elements of a test kit, such as a test strip, including reagents of the present invention.
- Another aspect of the present invention is a polypeptide, specific binding member or nucleic acid molecule of the present invention that can be used as a vaccine for a BDN.
- the present invention also includes animals vaccinated using the compositions or methods of the present invention.
- a vaccine of the present invention can include a polypeptide of the present invention.
- the polypeptide can be provided in a pharmaceutically acceptable carrier and can optionally be provided with an appropriate adjuvant.
- the vaccine can be provided in at least one container in a single dose or in multiple doses.
- the dose, route of administration and regime of vaccine administration are such that the desired response is obtained.
- An effective amount, dose and regime of a vaccine can be determined by administering a vaccine via a variety of routes in a variety of amount by a variety of regimes to a subject and monitoring the response obtained by such administration.
- a vaccine to stimulate a humoral and/or cellular immune response to the vaccine and/or a BDN indicates that a vaccine and its method of administration are efficacious.
- Such cellular and humoral cellular responses can be determined using methods known in the art (see, for example, Clark, The Experimental Foundations of Modern
- a subject After the administration of a vaccine, a subject can be challenged with a BDN to establish that the vaccine can prevent or reduce the severity of infection with a BDN.
- the subject if the subject has been exposed to or become infected with a BDN, the subject can be administered a vaccine in order to establish that the vaccine can prevent or reduce the severity of such an infection.
- Vaccines can be administered by any appropriate route of administration, including, for example, intramuscularly, subcutaneously, orally or by other acceptable routes of administration.
- Vaccine regimes can include a single or plural administrations of a vaccine at a single or different doses at a single or multiple routes of administration.
- the method of the present invention includes administering a vaccine of the present invention to a subject, such as an animal and/or a human.
- a subject such as an animal and/or a human.
- the immune status of the subject as to the presence of a humoral and/or cellular response to the vaccine and/or a BDV can optionally be determined or confirmed using methods discussed herein.
- the present invention also includes a subject, particularly a non-human subject or non-human animal, that has been administered a vaccine of the present invention, particularly such a subject that has immunity to a BDV.
- Immunity in this instance refers to a subject that exhibits a humoral and or cellular immune response to the vaccine and/or BDV.
- the present invention also includes vaccines that include a specific binding member of the present invention, preferably preparations that include at least one antibody or an active fragment thereof.
- the antibody preparation is of a type that is not itself substantially antigenic to the recipient of the vaccine, such as "humanized” antibodies being administered to humans rather than mouse antibodies being administered to humans.
- Such "humanized” antibodies can be made using methods known in the art.
- Vaccine compositions that include such specific binding members are most useful for "passive" immunity after a subject has been exposed to a BDV such that the likelihood of infection or severity of infection are reduced.
- the dose, route of administration and regime of vaccination can be determined using methods discussed herein and as are known in the art, such as for passive immunization against hepatitis B virus as is known in the art.
- the method of the present invention includes administering a vaccine of the present invention to a subject, such as an animal and/or a human.
- a subject such as an animal and/or a human.
- the immune status of the subject as to the presence of a humoral and/or cellular immune response to the vaccine and/or a BDV can optionally be determined or confirmed using methods discussed herein.
- the present invention also includes a subject, particularly a non-human subject or non-human animal, that has been administered a vaccine of the present invention, preferably such a subject that has immunity to a BDV.
- Immunity in this instance refers to a subject that exhibits a humoral and/or cellular immune response to the vaccine and/or a BDV.
- naked nucleic acid vaccines have been used to vaccinate subjects against a variety of etiological agents.
- naked nucleic acid molecules devoid of vectors such as viral vectors are injected into a tissue, preferably muscle, where they are taken up by the tissue and expressed.
- the naked nucleic acid molecules preferably include expression control sequences appropriate for the expression of the nucleic acid molecule of the present invention.
- the naked nucleic acid molecule tends to reside extra- chromosomally and thus the nucleic acid molecule tends to be expressed only transiently.
- the nucleic acid molecule can become integrated into the host cell's genome and be expressed for extended periods of time and can be constitutively expressed.
- Such integration can be site directed by, for example, homologous recombination (see, for example, WO 94/24301 to Smith et al., published October 27, 1994) or be random (see, for example, WO 98/13353 to Whitney et al., published April 2, 1998).
- Nucleic acid vaccines can also be present in a vector such as a viral vector, such as retroviral vectors, vaccinia vectors, adenoviral vectors or adenoassociated vectors. These vectors can be targeted to particular tissues or to tissues in general.
- the nucleic acids of the present invention can be expressed in such cells as described in the section for naked nucleic acid vaccines.
- the nucleic acids of the present invention can be optionally operably linked to expression control sequences and can optionally remain extrachromosomal or become integrated into a cell's genome. Such integration can be directed (see, for example, WO 94/24301 to Smith et al., published October 27, 1994) or be random (see, for example, WO 98/13353 to Whitney et al., published April 2, 1998).
- the vaccines of the present invention can be of any nucleic acid structure.
- the vaccines can be single stranded, double stranded or triple stranded and can be of
- the nucleotides can be of any configuration, such as linear, circular, relaxed or supercoiled.
- the nucleic acid can be provided in an appropriate pharmaceutically acceptable carrier and can optionally be provided with an appropriate adjuvant in an appropriate amount.
- Vaccines can be administered by any appropriate route of administration, including, for example, intramuscularly, subcutaneously, orally or by other acceptable routes of administration. Vaccine regimes can include a single or plural administrations of a vaccine at a single or different doses at a single or multiple routes of administration.
- the method of the present invention includes administering a vaccine of the present invention to a subject, such as an animal and/or a human.
- a subject such as an animal and/or a human.
- the immune status of the subject as to the presence of a humoral and/or cellular response to the vaccine and/or a BDV can optionally be determined or confirmed using methods discussed herein.
- the present invention also includes a subject, particularly a non-human subject or non-human animal, that has been administered a vaccine of the present invention, particularly such a subject that has immunity to a BDV.
- Immunity in this instance refers to a subject that exhibits a humoral and/or cellular immune response to the vaccine and/or a BDV.
- the present invention also includes methods of determining whether a subject has been exposed to, infected with or vaccinated against a BDV.
- samples from a subject can be any sample from the subject, such as any tissue, fluid, excretion, secretion or combination thereof.
- the sample is a sample that would be expected to contain anti-BDV antibodies, a BDV virus, cells infected with a BDV, polypeptides from a BDV or nucleic acids from a BDV.
- the sample can be assayed as is, or can be prepared prior to an assay being performed. Such preparation methods include dilution, concentration, extraction or other method of preparation suitable for a particular assay format.
- the present invention also includes a method of testing a subject to determine whether the subject has a been exposed to, infected with or vaccinated against a BDV.
- the method includes the steps of: providing a sample from a subject; contacting the sample with a polypeptide of the present invention; and detecting the binding of the polypeptide with the sample.
- the sample is being tested to determine whether the sample includes anti-BDV antibodies that bind with a polypeptide of the present invention.
- blood, serum, body secretions or other samples that contain relatively high amounts of antibodies of any class or subclass are preferred. Serum is a preferred sample for this aspect of the present invention.
- the present invention also includes a method of testing a subject to determine whether the subject has a been exposed to, infected with or vaccinated against a BDV.
- the method includes the steps of: providing a sample from a subject; contacting the sample with a specific binding member of the invention, preferably an antibody; and detecting the binding of the specific binding member with said sample.
- the sample is being tested to determine whether the sample includes peptides from a BDV that bind with a specific binding member of the present invention.
- blood, serum, CNS fluid, body secretions or other samples such as tissues and cells, particularly tissues and cells of neural or blood origin, that contain relatively high amounts of polypeptides from a BDV, particularly polypeptide p 10, are preferred.
- the sample is contacted with a specific binding member of the present invention, such as an antibody of the present invention immobilized upon a solid support, and the binding of the antibody to the polypeptide detected.
- a detectably labeled antibody is used to detect antigen bound to the immobilized specific binding member in a sandwich-type format, but any appropriate format can be used, particularly those discussed herein.
- control can be provided as part of the assay method, such as positive and negative controls as they are appropriate and known in the art.
- the control includes a standard curve that provides a quantitative or semi -quantitative readout for the method, although qualitative readouts are also considered part of the present invention.
- the sample is being tested to determine whether the sample includes nucleic acids, such as nucleic acids from a BDV, that hybridize with a nucleic acid of the present invention.
- nucleic acids such as nucleic acids from a BDV
- blood, serum, and other suitable cells are being tested to determine whether the sample includes nucleic acids, such as nucleic acids from a BDV, that hybridize with a nucleic acid of the present invention.
- CNS fluid, body secretions or other samples such as tissues and cells, particularly cells of neural or blood origin, that contain relatively high amounts of nucleic acids from a BDV are preferred.
- the nucleic acid molecule of the present invention is contacted with the sample.
- the nucleic acids in the sample have been immobilized upon a solid support, such as a membrane, and the nucleic acid molecule of the present invention is detectably labeled, but that need not be the only format to be utilized and any appropriate assay format is contemplated.
- nucleic acids from a BDV in a sample can be amplified using appropriate nucleic acid amplification procedures, such as PCR and appropriate primers.
- the amplification product can be detected directly using established methods, or can be detected using hybridization methods described herein.
- the amount of nucleic acid from a BDV in a sample can be determined by comparing the amount of detectable label bound to the nucleic acids in the sample with a standard or control prepared for the assay.
- the control can include assay readouts for positive, negative and questionable results.
- the control can be provided as part of the assay method, such as positive and negative controls as they are appropriate and known in the art.
- the control includes a standard curve that provides a quantitative or semi-quantitative readout for the method, although qualitative readouts are also considered part of the present invention.
- the present invention also includes a method for identifying a test compound or a bioactivity.
- This method includes contacting a sample comprising at least one cell infected with a BDV with a test compound and monitoring the course of infection with a BDV in the at least one cell.
- at least one cell is contacted with a test compound, the contacted at least one cell is then contacted with a BDV and the course of infection with a BDV in the at least one cell is monitored.
- at least one BDV is contacted with a test compound, the contacted BDV is then contacted with at least one cell and the course of infection with a BDV in the at least one cell is monitored.
- At least one cell is contacted with at least one BDV and at least one test chemical and the course of infection with a BDV in the at least one cell is monitored.
- the results obtained by this method are compared with the results obtained using appropriate controls, such as, for example, cells that are infected with a BDV but have not been contacted with a test compound and cells that have not been infected with a BDV and have not been contacted with a test compound.
- Appropriate controls can be determined by the skilled artisan based on the particular assay format used.
- the at least one cell used in this method is preferably a cell that is permissive to infection with a BDV.
- Such cells are known in the art and are set forth herein in the Examples.
- Test compounds that modulate the course of infection with a BDV, particularly by slowing or preventing the course of the infection with a BDV, have presumptive therapeutic activity to prevent or treat infection with a BDV.
- the course of infection with a BDV in the at least one cell can be monitored using any appropriate method.
- methods that use a detectable label are used so that the readout can be used in automated methods, such as in high throughput screening methods.
- the presence or amount of a polypeptide from a BDV or nucleic acid molecule from a BDV can be detected in the cells or cell lysates using methods described herein.
- polypeptides from a BDV can be detected in cells using immunohistochemical methods, preferably using at least one specific binding member that is detectably labeled.
- cell lysates can be prepared and polypeptides from a BDV detected therein using immunoassay formats, including western blot analysis as described herein, preferably using detectably labeled specific binding members.
- nucleic acids from a BDV can be detected in cells using in situ hybridization methods, preferably using detectably labeled nucleic acid molecules as probes.
- nucleic acids from a BDV in cell lysates can be detected using, for example, PCR amplification methods or dot blot or slot blot analysis as described herein.
- nucleic acids from a BDV can be used in these methods to monitor the course of infection with a BDV.
- nucleic acids from a BDV can be used in these methods to monitor the course of infection with a BDV.
- nucleic acids from a BDV can be used in these methods to monitor the course of infection with a BDV.
- BDV that encode a polypeptide plO or specific binding members that bind with a polypeptide pi 0 are used, more preferably detectably labeled nucleic acids or detectably labeled specific binding members.
- the present invention includes a compound or composition identified by a method of the present invention.
- a compound or composition prevents infection with a BDV of a cell, decreases the severity of infection with a BDV, alters the time course of infection with a BDV or prevents the production of viable BDV from an infection with a BDV or results in fewer viable BDV from being produced from an infection with a BDV.
- other mechanisms of action of a compound or composition may be identified and the inventors expressly do not wish to be limited to any mode of action or mechanism.
- An identified compound or composition can be provided in a pharmaceutically acceptable carrier and alternatively in a pharmaceutically effective amount. Such compounds or compositions can be provided in appropriate packaging for pharmaceutical compositions and provide instructions for use thereof.
- the present invention also includes a system that can be used to practice at least one method of the present invention.
- Such systems can include a storage structure, a dispensation structure, a detector structure, and a computing structure, each of which can be separate or combined.
- a storage structure stores at least one reagent for use in a method, such as cells, buffers and test compounds.
- the dispensation structure dispenses such reagents into a receptacle for use in the method, such as a solid support such as a microtiter plate.
- the detector structure includes a detector to detect the readout of the method, such as radioactivity, chromogens or fluorescence.
- the computing structure is directly or indirectly connected to the detection structure and obtains data therefrom.
- a system of the present invention includes at least one polypeptide, cell, specific binding member, nucleic acid or other compound or reagent of the present invention.
- Such compounds or reagents of the present invention can be used in at least one method of the present invention, or in other methods, for use in a system of the present invention.
- test compound The structure of a test compound can be determined or confirmed by methods known in the art, such as mass spectroscopy . For test compounds stored for extended periods of time under a variety of conditions, the structure, activity and potency thereof can be confirmed. Identified test compounds can be evaluated for a particular activity using art-recognized methods and those disclosed herein. For example, if an identified test compound is found to have anticancer cell activity in vitro, then the test compound would have presumptive pharmacological properties as a chemotherapeutic to treat cancer. Such nexuses are known in the art for several disease states, and more are expected to be discovered over time. Based on such nexuses, appropriate confirmatory in vitro and in vivo models of pharmacological activity, and toxicology, and be selected and performed. The methods described herein can also be used to assess pharmacological selectivity and specificity, and toxicity.
- test compounds can be evaluated for toxicological effects using known methods (see, Lu, Basic Toxicology, Fundamentals, Target Organs, and Risk Assessment, Hemisphere Publishing Corp., Washington (1985); U.S. Patent Nos; 5, 196,313 to Culbreth (issued March 23,
- the toxicological properties of a test compound in an animal model can be determined using established methods (see, Lu, supra ( 1985); and Creasey, Drug Disposition in Humans, The
- Efficacy of test compounds can be established using several art recognized methods, such as in vitro methods, animal models or human clinical trials (see, Creasey, supra (1979)). Recognized in vitro models exist for several diseases or conditions. For example, the ability of a compound or composition to extend the life-span of HIV-infected cells in vitro is recognized as an acceptable model to identify chemicals expected to be efficacious to treat HIV infection or AIDS (see, Daluge et al., Antimicro. Agents Chemother. 41:1082- 1093 ( 1995)).
- CsA cyclosporin A
- the selectivity of a test compound can be established in vitro by testing the toxicity and effect of a test compound on a plurality of cell lines that exhibit a variety of cellular pathways and sensitivities.
- the data obtained from these in vitro toxicity studies can be extended to animal model studies, including human clinical trials, to determine toxicity, efficacy and selectivity of a test compound.
- the selectivity, specificity and toxicology, as well as the general pharmacology, of a test compound can be often improved by generating additional test chemicals based on the structure/property relationship of a test compound originally identified as having activity.
- Test compounds can be modified to improve various properties, such as affinity, life-time in blood, toxicology, specificity and membrane permeability.
- test compounds can be subjected to additional assays as they are known in the art or described herein. Methods for generating and analyzing such compounds or compositions are known in the art, such as U.S. Patent No. 5,574,656 to Agrafiotis et al.
- Pharmaceutical compositions The present invention also encompasses a test compound in a pharmaceutical composition comprising a pharmaceutically acceptable carrier prepared for storage and preferably subsequent administration, which has a pharmaceutically effective amount of the test compound in a pharmaceutically acceptable carrier or diluent.
- Acceptable carriers or diluents for therapeutic use are well known in the pharmaceutical art, and are described, for example, in Remington's Pharmaceutical Sciences, Mack Publishing Co., (A.R. Gennaro edit. (1985)).
- test compounds of the present invention can be formulated and used as tablets, capsules or elixirs for oral administration; suppositories for rectal administration,; sterile solutions, suspensions or injectable administration; and the like.
- injectables can be prepared in conventional forms either as liquid solutions or suspensions, solid forms suitable for solution or suspension in liquid prior to injection, or as emulsions. Suitable excipients are, for example, water, saline, dextrose, mannitol, lactose, lecithin, albumin, sodium glutamate, cysteine hydrochloride and the like.
- the injectable pharmaceutical compositions can contain minor amounts of nontoxic auxiliary substances, such as wetting agents, pH buffering agents and the like. If desired, absorption enhancing preparations, such as liposomes, can be used.
- the pharmaceutically effective amount of a test compound required as a dose will depend on the route of administration, the type of animal or patient being treated, and the physical characteristics of the specific animal under consideration.
- the dose can be tailored to achieve a desired effect, but will depend on such factors as weight, diet, concurrent medication and other factors which those skilled in the medical arts will recognize.
- the pharmaceutical compositions can be used alone or in combination with one another, or in combination with other therapeutic or diagnostic agents. These products can be utilized in vivo, preferably in a mammalian patient, preferably in a human, or in vitro.
- the pharmaceutical compositions can be administered to the patient in a variety of ways, including parenterally, intravenously, subcutaneously, intramuscularly, colonically, rectally, nasally or intraperiotoneally, employing a variety of dosage forms. Such methods can also be used in testing the activity of test compounds in vivo.
- the useful in vivo dosage to be administered and the particular mode of administration will vary depending upon the age, weight and type of patient being treated, the particular pharmaceutical composition employed, and the specific use for which the pharmaceutical composition is employed.
- the determination of effective dosage levels can be accomplished by one skilled in the art using routine methods as discussed above.
- human clinical applications of products are commenced at lower dosage levels, with dosage level being increased until the desired effect is achieved.
- acceptable in vitro studies can be used to establish useful doses and routes of administration of the test compounds.
- applications of the pharmaceutical compositions are commenced at higher dose levels, with the dosage being decreased until the desired effect is no longer achieved or adverse side effects are reduced of disappear.
- the dosage for the test compounds of the present invention can range broadly depending upon the desired affects, the therapeutic indication, route of administration and purity and activity of the test compound. Typically, dosages can be between about 1 ng/kg and about 10 micrograms/kg, preferably between about 10 ng/kg and about 1 mg/kg, more preferably between about 100 ng/kg and about 100 micrograms/kg, and most preferably between about 1 microgram/kg and about 10 micrograms/kg.
- the exact formulation, route of administration and dosage can be chosen by the individual physician in view of the patient's condition (see, Fingle et al., in The Pharmacological Basis of Therapeutics (1975)). It should be noted that the attending physician would know how to and when to terminate, interrupt or adjust administration due to toxicity, organ dysfunction or other adverse effects. Conversely, the attending physician would also know to adjust treatment to higher levels if the clinical response were not adequate.
- the magnitude of an administrated does in the management of the disorder of interest will vary with the severity of the condition to be treated and to the route of administration. The severity of the condition may, for example, be evaluated, in part, by standard prognostic evaluation methods.
- the dose and perhaps dose frequency will also vary according to the age, body weight and response of the individual patient, including those for veterinary applications.
- such pharmaceutical compositions can be formulated and administered systemically or locally. Techniques for formation and administration can be found in Remington's Pharmaceutical Sciences, 18th Ed., Mack Publishing Co., Easton, PA (1990). Suitable routes of administration can include oral, rectal, transdermal, otic, ocular, vaginal, transmucosal or intestinal administration; parenteral delivery, including intramuscular, subcutaneous, intramedullary injections, as well as intrathecal, direct intraventricular, intravenous, intraperitoneal, intranasal, or intraocular injections.
- the pharmaceutical compositions of the present invention can be formulated in aqueous solutions, preferably in physiologically compatible buffers such as Hanks' solution, Ringer' s solution or physiological saline buffer.
- physiologically compatible buffers such as Hanks' solution, Ringer' s solution or physiological saline buffer.
- penetrans appropriate to the barrier to be permeated are used in the formulation.
- Such penetrans are generally known in the art.
- Use of pharmaceutically acceptable carriers to formulate the pharmaceutical compositions herein disclosed for the practice of the invention into dosages suitable for systemic administration is within the scope of the invention. With proper choice of carrier and suitable manufacturing practice, the compositions of the present invention, in particular, those formulation as solutions, can be administered parenterally, such as by intravenous injection.
- compositions suitable for use in the present invention include compositions wherein the active ingredients are contained in an effective amount to achieve its intended purpose. Determination of the effective amount of a pharmaceutical composition is well within the capability of those skilled in the art, especially in light of the detailed disclosure provided herein.
- these pharmaceutical compositions can contain suitable pharmaceutically acceptable carriers comprising excipients and auxiliaries which facilitate processing of the active chemicals into preparations which can be used pharmaceutically.
- the preparations formulated for oral administration may be in the form of tables, dragees, capsules or solutions.
- compositions of the present invention can be manufactured in a manner that is itself known, for example by means of conventional mixing, dissolving, granulating, dragee-making, emulsifying, encapsulating, entrapping or lyophilizing processes.
- Pharmaceutical formulations for parenteral administration include aqueous solutions of active chemicals in water-soluble form.
- suspensions of the active chemicals may be prepared as appropriate oily injection suspensions.
- Suitable lipophilic solvents or vehicles include fatty oils such as sesame oil, or synthetic fatty acid esters, such as ethyl oleate or triglycerides or liposomes.
- Aqueous injection suspensions may contain substances what increase the viscosity of the suspension, such as sodium carboxymethyl cellulose, sorbitol or dextran.
- the suspension can also contain suitable stabilizers or agents that increase the solubility of the chemicals to allow for the preparation of highly concentrated solutions.
- compositions for oral use can be obtained by combining the active chemicals with solid excipient, optionally grinding a resulting mixture, and processing the mixture of granules, after adding suitable auxiliaries, if desired, to obtain tables or dragee cores.
- suitable excipients are, in particular, fillers such as sugars, including lactose, sucrose, mannitol or sorbitol; cellulose preparations such as, for example, maize starch, wheat starch, rice starch, potato starch, gelatin, gumtragacanth, methyl cellulose, hydroxypropylmethyl-cellulose, sodium carboxymethylcellulose and/or polyvinylpyrrolidone.
- test compounds of the present invention can be provided with suitable coatings. Dyes or pigments can be added to the tablets or dragee coatings for identification or to characterize different combinations of active doses.
- the test compounds of the present invention, and pharmaceutical compositions that include such test compounds are useful for treating a variety of ailments in a patient, including a human.
- a patient in need of such treatment can be provided a test compound of the present invention, preferably in a pharmacological composition in an effective amount to reduce the number or infectivity of viruses in said patient.
- the amount, dosage, route of administration, regime and endpoint can all be determined using the procedures described herein.
- Suitable starting material for the process of this invention are mammalian cells infected with a BDV.
- Examples of these include brains from animals infected with a BDV from the field or from the laboratory, and mammalian cell lines such as Madin-Darby canine kidney (MDCK) cells from the American Type Culture Collection, Rockville, MD, accession number CCL-34, and infected with a BDV in the laboratory.
- MDCK Madin-Darby canine kidney
- Total RNA may be isolated from the BDV-infected cells by standard techniques described in standard texts, including "Molecular Cloning - A Laboratory Manual" Second Edition by J. Sambrook, E.F. Fritsch and T. Mariatis, Cold Spring Harbor Laboratory Press 1989.
- oligonucleotide primers that hybridize to either ends of the ORFxl are used in the reverse transcription-polymerase chain reaction (RT-PCR) to synthesize and amplify ORFxl cDNA from the total RNA template.
- RT-PCR reverse transcription-polymerase chain reaction
- Desirable pairs of primers include :
- Primer 1 5'-CGGGAATTCACCATGGGTTCCGACCTCCGG-3' (SEQ ID NO:3),
- Primer 2 5'-TGCCTCGAGTCACTTGTCATCGTCGTCCTTGTAGTCTTCGATAGCTGCTCCC-3' (SEQ ID NO:
- RT-PCR can be performed by use of a RT-PCR kit (Strategene, La Jolla, CA) in a thermal cycler (Perkin-Elmer Corp., Foster City, CA). Typically, between 20 and 35 cycles of thermal reaction may be performed. Generally, 30 cycles, each consisting of denaturation at 94°C for 2 mins, annealing at 54°C for 1 min and extension at 72°C for 2 mins, followed by a final extension at 72°C for 10 mins are desirable.
- the RT-PCR product is digested with the appropriate restriction enzyme and unidirectionally ligated into a suitable expression vector by standard molecular biology techniques.
- Prokaryotic expression vectors and eukaryotic expression vectors are suitable vectors.
- suitable expression vectors include but are not limited to the pGEX series of prokaryotic expression vectors from Pharmacia (Piscataway, NJ.) catalog numbers 27-4805-01, 27-4801-01, 27-4803-01, 47-4580-01, 27-4581-01, 27-4583-
- the recombinant constructs can then be used to express the desired BDV polypeptide p 10 in a prokaryote by transformation into competent E. coli (Example 1) or in a eukaryote by transfection of mammalian cells (Example 2).
- the cDNAs in the recombinant construct can be sequenced by standard molecular biology techniques (Sanger, Proc. Natl. Acad. Sci. USA 74:5463 (1977)).
- the nucleotide sequence (SEQ ID NO: 5 of FIG.2, and GeneBank Accession number 030353) of the cDNA inserts is 98% homologous to the nucleotide sequence from nucleotide 1223 to 1486 of the previously reported He/80- 1 clone of horse-derived BDV (homology being determined using Intelligenetics pcGene program, version 6.85).
- the amino acid sequence of the recombinant pi 0 deduced from the cDNA sequence is given as SEQ ID NO: 6 in FIG. 3.
- This invention teaches that the purified polypeptide pi 0 recombinant fusion protein can be used to raise specific antibodies by injection into experimental animals (Example 3), and the resultant specific polyclonal antiserum can be used to detect BDV and its associated viruses in cells infected with the virus (FIG. 4 and FIG. 5).
- This detection of BDV polypeptide plO by the specific polyclonal antiserum in BDV-infected cells, but not in non- infected cells shows that BDV polypeptide pi 0 is a naturally occurring protein of BDV.
- the present invention also teaches the use of this BDV polypeptide plO-specific antiserum to detect cells infected with BDV or BDV-associated viruses, because non-infected cells do not react with the antiserum.
- This BDV polypeptide plO-specific antiserum can be used as a diagnostic to identify the presence of BDV in animal or human specimens/cells. From prior art, it also is clear that by use of tissue cultured cells BDV can be isolated from infected animals or humans (Lundgren, J. gen. Virol. 76:2215 (1995); Bode, Mol. Psychiatry 1 :200 (1996)), and the presence of the virus in the cultured cells can be identified by the an antiserum.
- the BDV polypeptide pi 0-specific antiserum given in Example 3 can, therefore, be used as a diagnostic to identify the presence of BDV in tissue cultured cells inoculated with human or animal specimens.
- the identification can be carried out by immunological techniques known in the art, and may include, but not limited to, immunofluorescence, immunochemistry, immunoprecipitation and Western blot.
- the present invention also concerns testkits for determining antibodies directed against BDV polypeptide pi 0 as a marker for BDV and BDV-associated infection.
- the immunological detection can be accomplished by techniques known in the art.
- kits comprise a solid support with BDV polypeptide pi 0 protein.
- the solid support may include a matrix material, polystyrene or other plastic beads or supports to which BVD polypeptide plO is readily bound, such as a matrix material for performing immunoprecipitation and immunoaffinity chromatography; beads for performing immune agglutination tests, microtiter dishes for performing the ELISA; or a dipstick for performing a sandwich-type assay.
- the solid support may be a nylon/nitrocellulose membrane to which the pi 0 protein can be deposited and linked for performing Western blots as shown in Example 4.
- the solid support also can be in a form of animal cells transfected by an eukaryotic vector expressing plO (Examples 2 and FIG. 6) for immunofluorescence or immunochemistry tests.
- Other reagents for carrying out the assay may be present in the kit, these reagents include but not limited to enzymes, dyes, chromogenic substrates etc. for detecting the antibody-antigen complexes.
- nucleic acid hybridization techniques also can be used to determine the presence of BDV or a BDV associated virus. These can be performed as they are known in the art. Hybridizations can be performed electrophoretically on separated RNA species isolated from cells or tissues, as in the Northern techniques. Alternatively, hybridizations can be performed in situ. Other techniques known to the art can be performed by use of specific nucleotide probes specific to BDV and BDV-related polypeptide plO herein.
- a further aspect of this invention teaches the use of BDV polypeptide plO to raise a BDV-specific immune response in animals as demonstrated in Example 3.
- the raising of a specific immune response provides protection, therefore, a vaccine, against the virus infection.
- Both p 10 protein, peptides, polypeptides and the nucleic acid fragments that encodes polypeptide plO and its fragments may be used as vaccines against BDV and BDV- related viruses.
- nucleic acid fragments in the form of DNA in an expression vector, or in the form of DNA or RNA in an infectious suicide virus particle also can be used as vaccines (Tang, Nature 356:152 (1992); Ulmer, Science 259:1745 (1993)).
- These nucleic acid vaccines can be delivered intramuscularly by injection or intradermally by a device, preferably a gene-gun. At the site of vaccination, the inoculated nucleic acid fragments are expressed transiently as proteins, peptides or polypeptides to raise specific immune responses and provide protection.
- the BDV ORFxl cDNA was amplified from 2 microgram of total RNA by use of (SEQ ID NO:l and SEQ ID NO: 2, respectively)
- the amplified product was purified from agarose gels, digested with EcoRI and Xhol, and cloned into the EcoRI -Xhol sites of the pG ⁇ X4T-3 vector (Pharmacia, Catalog number 27-4583-0 l)in-frame and downstream of the glutathione-S-transferase (GST) gene of
- Schistosoma japonicum controlled by the tac promoter This resultant construct pGEX-ORFxl was used to transform competent E. coli bacteria, strain JM 109, grown to log phase. As control, JM109 bacteria transformed by the pGEX4T-3 vector were grown the same way. Test and control bacteria were induced by IPTG (0.1 mM) for 2.5 hours to ensure high-level expression ofthe fusionprotein. Thebacteriawerethen spundownandre-suspendedinbuffer (lx PBS, 1% triton-XlOO). Two cycles of freeze-thaw were followed by 6 cycles of sonication on ice, each at a 15 second burst to disrupt the cells.
- the amplified product was purified from agarose gels, digested with EcoRI and TzoI, and cloned into the EcoRI -Xhol sites of the pcDNA-3 eukaryotic expression vector (Invitrogen, Catalog number V790-20) to give the new construct pcORFxl-FLAG. Sequencing to determine the nucleotide sequence of the EcoRI-. ⁇ 7joI DNA fragment in the pcORFxl-FLAG vector was performed by standard methods (Sanger, supra). This nucleotide sequence of ORFxl-FLAG
- the GST-p 10 fusion protein from the pGEX-ORFx 1 -transformed JM 109 E. coli bacteria was purified by affinity chromatography as described in Example 1 and dialyzed against PBS for 16 hours at 4°C. The concentration of the GST-plO fusion protein in solution after dialysis was determined by use of a spectrophotometer. Monospecific polyvalent antiserum to the GST- plO fusion protein was generated by subcutaneous immunization of a rabbit with 1 mg of the GST-plO fusion protein in complete Freund's adjuvant (CFA). Four and eight weeks later, this rabbit received booster immunizations with the same quantity of the GST-plO fusion protein. Ten days after the last booster injection, the rabbit was bled and the serum was tested against BDV-infected cells and non-infected cells (FIG. 4 and FIG. 5), and cells expressing pi 0 (FIG.
- CFA complete Freund's adjuvant
- FIG.4 shows that in Western blot, the rabbit antiserum reacted with the infected C6BV cells and not the non-infected C6 cells.
- FIG. 5 shows the rabbit antiserum positively stained the infected MDCK/BV cells in IF A, but did not stain the non-infected MDCK cells. Thus, the rabbit antiserum was able to detect BDV infection in tissue cultured cells.
- FIG. 6 shows that cells transfected with the pcORFxl-FLAG construct expressed the BDV plO which was detected by the rabbit antiserum in IFA.
- EXAMPLE 4 RECOMBINANT PlO LINKED TO SOLID SUPPORT DETECTS INFECTION BY BDV OR BDV- ASSOCIATED VIRUSES.
- Sepharose 4B Sepharose 4B; Pharmacia, Catalog number 27-4570-01
- the eluted GST-p 10 fusion protein and the control GST protein were suspended in Laemmli sample buffer (Laemmli, Nature 227:680 (1970)), heated at 100°C for 2 min, and resolved by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) on 12% polyacrylamide gel.
- SDS-PAGE sodium dodecyl sulfate-polyacrylamide gel electrophoresis
- the resolved proteins on the gel were transferred to a nitrocellulose membrane by electroblotting.
- the nitrocellulose membrane providing solid support to the proteins was cut into strips, and each strip was soaked in a solution containing 5% (w/v) powdered skimmed milk at room temperature overnight.
- FIG. 7 shows that only the serum from the infected rabbit gave a positive band against the recombinant BDV plO, serum from non-infected rabbit did not.
- horse sera tested against the immunoblotted recombinant BDV plO gave comparable results, i.e., serum from an infected horse gave a positive band against the recombinant BDV plO, whereas sera from non-infected horses did not (FIG. 8).
- EXAMPLE 5 NUCLEAR LOCALIZATION OF POLYPEPTIDE PlO AND INTERACTION OF POLYPEPTIDE PlO WITH P40
- the MDCK/BV cell line was as discussed in the preceding examples. Rat glial tumor cells not infected with BDV (Cell line C6) and persistently infected with BDV (Cell line C6BV) (ATCC CCL- 107), and cos-7 cells (ATCC CRL- 1651) were also used. Cells were cultured in Dulbecco's modified Eagle's medium with 10% fetal bovine serum, 2 mM glutamine, 100 U/ml penicillin and 100 micrograms/ml streptomycin (Malik et al., Virology 258:65-72 (1999)).
- Antibodies that bind with polypeptide plO or polypeptide p40 were made as described in Example 3 and the literature (Malik et al., Virology 258:65-72 (1999)).
- Expression Vectors Prokaryotic and eukaryotic expression vectors for polypeptide pi 0 and polypeptide p40 were made as described in the literature (Malik et al., Virology 258:65-72 (1999)). Briefly, total RNA was isolated from MDCK BV cells. cDNA molecules encoding polypeptide plO were made using specific primer pairs and RT-PCR.
- the cDNA molecule was digested with EcoRI and Xhol and cloned in-frame to the GST sequence in the pGEX 4T-3 vector (Pharmacia) to provide pGEX-ORFxl prokaryotic expression vector.
- cDNA molecules encoding polypeptide p40 were made using specific primer pairs and RT-PCR.
- the cDNA molecules were cloned into the BamHl site of pGEX-5X-3 vector (Pharmacia) to provide pGEX-N.WILD construct.
- polypeptide plO and polypeptide p40 in eukaryotic cells was performed as described in the literature (Malik et al., Virology 258:65-72 (1999)). Briefly, untransfected cells were transfected with plasmid using Lipfectamine from Life Technologies. Cells were fixed between about 24 hours and about 48 hours after transfection with 4% parafomaldehyde and stained with the appropriate antibody. Cells not transfected or mock-transfected were treated the same way and were used as controls. Immunofluorescence was detected suing epifluroescence microscopy or a confocal laser scanning microscope using a krypton and/or argon lamp.
- Protein-protein interactions between polypeptide plO and polypeptide p40 were evaluated as described in the literature (Malik et al., Virology 258:65-72 (1999)). Briefly, in vitro transcription/translation of pcORFxl-FLAG was performed by use of the TNT-coupled rabbit reticulocyte lysate system (Promega). A sample of the in vitro products was resolved by denaturing SDS-PAGE and analyzed after fluorography, or immunoprecipitated by use of anti-FLAG monoclonal antibody before SDS-PAGE and fluorography. The GST-p40 fusion protein was purified by glutathione column chromatography of the lysate from the pGEX-
- N.WILD-transformed bacteria The purified protein was cross-linked to glutathione 4B beads to provide a solid phase. For protein-protein interaction, between about 1 and about 2 micrograms of GST-p40 was then mixed with the 35S-labeled in vitro transcribed/translated plO-FLAG protein. After washing, proteins bound to the beads were resolved by SDS-PAGE and analyzed by Western blotting with appropriate antibodies. In addition, the blot was subjected to autoradiography to detect any bound 35S-labeled proteins. Nuclear Localization of Polypeptide pi 0 in BDV-infected Cells
- FIG. 9 the subcellular localization of polypeptide plO was investigated using rabbit anti-plO antibodies in BDV-infected C6BV cells and noninfected C6 cells by indirect immunofluorescence.
- FIG. 9 A the anti-plO staining was localized in the cytoplasm and nucleus of the C6BV cells. The C6 cells were not stained (FIG. 9B). Both C6BV and C6 cells were not stained by the preimmune sera (FIG. 9C and FIG. 9D).
- Soluble cell lysate from C6BV cells was immunoprecipitated with anti-plO serum and the precipitate recovered by protein G beads.
- Eukaryotic expression vectors pcORFxl-FLAG and pDL-N.WILD were cotransfected into Cos-7 cells.
- the Cos-7 cells were used because they allow plasmid replication of the pcORFxl-FLAG, which contains the SV40 origin of replication, and thereby provide increased expression of plO.
- Soluble cell lysate from the cotransfected Cos-7 cells was immunoprecipitated with anti-plO serum and the precipitate recovered by protein G beads. Analysis of the immune precipitate via western blotting with a BDV-infected rabbit serum showed that plO and p40 were coprecipitated by the anti-plO serum. Preimmune serum did not immunoprecipitate plO and/or p40.
- Western blots were developed using Protein A cross- linked to alkaline phosphatase reactive to BCIP/NBT to detect antibody-antigen interactions.
- the pcORFxl-FLAG vector was in vitro transcribed by the T7 polymerase and translated to give the 35 S-labeled plO-FLAG, which could be immunoprecipitated with the anti-FLAG monoclonal antibody.
- the GST-p40 fusion protein from pGEX-N.WILD- transformed bacteria was cross-linked to glutathione 4B beads.
- the labeled plO-FLAG protein was allowed to interact with the GST-p40 bound to solid phase. Analysis of the bound proteins via Western blotting showed that the labeled plO-FLAG protein had bound to the GST-p40 protein, establishing that the pi 0 had interacted with the p40.
- Asn Gly Asn Ala Thr lie Glu Ser Gly Arg Leu Pro Gly Gly Arg Arg 20 25 30 Arg Ser Pro Asp Thr Thr Thr Gly Thr lie Gly Val Thr Lys Thr Thr 35 40 45
- Pro Lys Glu Cys lie Asp Pro Thr Gly Arg Ser Ala Pro 50 55 60
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002341360A CA2341360A1 (en) | 1998-08-26 | 1999-08-24 | Nucleic acid and polypeptide p10 of a borna disease virus (bdv) and their use for diagnostic and immunization purposes |
EP99941247A EP1105417A4 (en) | 1998-08-26 | 1999-08-24 | Nucleic acid and polypeptide p10 of a borna disease virus (bdv) and their use for diagnostic and immunization purposes |
AU54938/99A AU5493899A (en) | 1998-08-26 | 1999-08-24 | Nucleic acid and polypeptide p10 of a borna disease virus (bdv) and their use for diagnostic and immunization purposes |
US09/763,509 US6740486B1 (en) | 1998-08-26 | 1999-08-24 | Nucleic acid and polypeptide p10 of a Borna Disease virus (BDV) and their use for diagnostic and immunization purposes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US9790198P | 1998-08-26 | 1998-08-26 | |
US60/097,901 | 1998-08-26 |
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WO2000012548A1 true WO2000012548A1 (en) | 2000-03-09 |
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PCT/US1999/019227 WO2000012548A1 (en) | 1998-08-26 | 1999-08-24 | Nucleic acid and polypeptide p10 of a borna disease virus (bdv) and their use for diagnostic and immunization purposes |
Country Status (4)
Country | Link |
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EP (1) | EP1105417A4 (en) |
AU (1) | AU5493899A (en) |
CA (1) | CA2341360A1 (en) |
WO (1) | WO2000012548A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2264172A1 (en) | 2002-04-05 | 2010-12-22 | Santaris Pharma A/S | Oligomeric compounds for the modulation of HIF-1alpha expression |
WO2015189116A1 (en) * | 2014-06-10 | 2015-12-17 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Pharmaceutical compositions for prevention or treatment of neurodegenerative diseases |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4851341A (en) * | 1986-12-19 | 1989-07-25 | Immunex Corporation | Immunoaffinity purification system |
US5654401A (en) * | 1990-11-28 | 1997-08-05 | The Johns Hopkins University | Borna disease virus-specific protein and kits |
EP0791654A1 (en) * | 1996-02-21 | 1997-08-27 | Jürgen A. Dr. Richt | Polypeptides corresponding to the amino acid sequences of proteins p57 or p9.5 of Borna disease virus, nucleic acid fragments coding therefore and their use for diagnostic and immunization purposes |
-
1999
- 1999-08-24 AU AU54938/99A patent/AU5493899A/en not_active Abandoned
- 1999-08-24 EP EP99941247A patent/EP1105417A4/en not_active Withdrawn
- 1999-08-24 CA CA002341360A patent/CA2341360A1/en not_active Abandoned
- 1999-08-24 WO PCT/US1999/019227 patent/WO2000012548A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4851341A (en) * | 1986-12-19 | 1989-07-25 | Immunex Corporation | Immunoaffinity purification system |
US5654401A (en) * | 1990-11-28 | 1997-08-05 | The Johns Hopkins University | Borna disease virus-specific protein and kits |
EP0791654A1 (en) * | 1996-02-21 | 1997-08-27 | Jürgen A. Dr. Richt | Polypeptides corresponding to the amino acid sequences of proteins p57 or p9.5 of Borna disease virus, nucleic acid fragments coding therefore and their use for diagnostic and immunization purposes |
Non-Patent Citations (2)
Title |
---|
See also references of EP1105417A4 * |
WEHNER T. ET AL.: "Detection of a Novel Borna disease virus-encoded 10 kDa protein in infected cells and tissues", JOURNAL OF GENERAL VIROLOGY,, vol. 78, October 1997 (1997-10-01), pages 2459 - 2466, XP002925350 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2264172A1 (en) | 2002-04-05 | 2010-12-22 | Santaris Pharma A/S | Oligomeric compounds for the modulation of HIF-1alpha expression |
US8357670B2 (en) | 2002-04-05 | 2013-01-22 | Enzon Pharmaceuticals, Inc. | Oligomeric compounds for the modulation of HIF-1A expression |
US8785617B2 (en) | 2002-04-05 | 2014-07-22 | Santaris Pharma A/S | Oligomeric compounds for the modulation of HIF-1A expression |
WO2015189116A1 (en) * | 2014-06-10 | 2015-12-17 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Pharmaceutical compositions for prevention or treatment of neurodegenerative diseases |
JP2017524375A (en) * | 2014-06-10 | 2017-08-31 | アンスティチュ ナショナル ドゥ ラ サンテ エ ドゥ ラ ルシェルシュ メディカル | Pharmaceutical composition for prevention or treatment of neurodegenerative diseases |
US10059748B2 (en) | 2014-06-10 | 2018-08-28 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Pharmaceutical compositions for prevention or treatment of neurodegenerative diseases |
Also Published As
Publication number | Publication date |
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AU5493899A (en) | 2000-03-21 |
EP1105417A1 (en) | 2001-06-13 |
CA2341360A1 (en) | 2000-03-09 |
EP1105417A4 (en) | 2002-08-07 |
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