WO2001074997A2 - Novel polypeptide - a human cannabis alcohol receptor protein 11 and polynucleotide encoding it - Google Patents

Novel polypeptide - a human cannabis alcohol receptor protein 11 and polynucleotide encoding it Download PDF

Info

Publication number
WO2001074997A2
WO2001074997A2 PCT/CN2001/000236 CN0100236W WO0174997A2 WO 2001074997 A2 WO2001074997 A2 WO 2001074997A2 CN 0100236 W CN0100236 W CN 0100236W WO 0174997 A2 WO0174997 A2 WO 0174997A2
Authority
WO
WIPO (PCT)
Prior art keywords
polypeptide
polynucleotide
receptor protein
human
cannabinol receptor
Prior art date
Application number
PCT/CN2001/000236
Other languages
English (en)
French (fr)
Other versions
WO2001074997A3 (fr
Inventor
Yumin Mao
Yi Xie
Original Assignee
Shanghai Biowindow Gene Development Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Biowindow Gene Development Inc. filed Critical Shanghai Biowindow Gene Development Inc.
Priority to AU46294/01A priority Critical patent/AU4629401A/en
Publication of WO2001074997A2 publication Critical patent/WO2001074997A2/zh
Publication of WO2001074997A3 publication Critical patent/WO2001074997A3/zh

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K14/00Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/705Receptors; Cell surface antigens; Cell surface determinants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides

Definitions

  • the present invention belongs to the field of biotechnology. Specifically, the present invention describes a new polypeptide, human cannabinol receptor protein 11, and a polynucleotide sequence encoding the polypeptide. The invention also relates to a preparation method and application of the polynucleotide and the polypeptide.
  • Cannabinol receptor protein is a protein receptor widely present in the body, and it is expressed in the brain, heart, lung, prostate, ovary and other tissues of the organism.
  • the central cannabinol receptor protein is expressed in human central nervous system, brain, heart, prostate, testis and other tissues; while the cannabinol receptor protein is not expressed in the central nervous system, it is found in the immune system. Higher expression. Both of them play important intermediate regulatory roles in the development and function of various tissues mentioned above [GaliegueS., Mary S. et al., 1995, Eur J Biochem, 232: 54-61].
  • the central cannabinol receptor protein mainly mediates the pharmacological activity of cannabis in the body, and its abnormal expression will directly affect the function of cannabis in the body, thereby triggering various related neurological disorders, such as Forette syndrome, compulsive behavior Disorders, Parkinson's syndrome, Alzheimer's disease, etc .;
  • the cannabinol receptor protein is highly expressed in the immune system of the organism. This protein works in concert with pertussis toxin-sensitive GTP binding protein to regulate the gland in the body. The activity of glycosyl cyclases, in turn, regulates various related immune system responses.
  • Mutations or abnormal expression of special amino acid sites in these domains will lead to abnormal function of the receptor protein, which is usually associated with some nervous system disorders and immune systems in the body.
  • the occurrence of disease is closely related.
  • the central cannabinol receptor mainly plays an important regulatory role in the development process of the nervous system.
  • Cannabinol receptors play an important role in the immune system. Mutation or abnormal expression of the central cannabinol receptor will usually lead to abnormal development and function of the nervous system in the body, which is usually closely related to the occurrence of various related nervous system disorders.
  • the protein can also be used to diagnose and treat various related diseases.
  • the expression profile of the polypeptides of the present invention is very similar to the expression profile of the human central cannabinol receptor, so their functions may also be similar.
  • the invention is named human cannabinol receptor protein n.
  • the human cannabinol receptor protein n protein plays an important role in regulating important functions of the body such as cell division and embryonic development, and it is believed that a large number of proteins are involved in these regulatory processes, so there has been a need in the art to identify more involved in these Process the human cannabinol receptor protein 1 1 protein, especially the amino acid sequence of this protein. Isolation of the new human cannabinol receptor protein 1 1
  • the protein-coding gene also provides the basis for research to determine the role of this protein in health and disease states. This protein may form the basis for the development of diagnostic and / or therapeutic drugs for diseases, so it is important to isolate its coding for DM.
  • Another object of the invention is to provide a polynucleotide encoding the polypeptide.
  • Another object of the present invention is to provide a recombinant vector containing a polynucleotide encoding a human cannabinol receptor protein 1 1.
  • Another object of the present invention is to provide a genetically engineered host cell containing a polynucleotide encoding a human cannabinol receptor protein 1 1.
  • Another object of the present invention is to provide a method for producing human cannabinol receptor protein 11.
  • Another object of the present invention is to provide antibodies against the polypeptide of the present invention, human cannabinol receptor protein 11.
  • Another object of the present invention is to provide mimic compounds, antagonists, agonists, and inhibitors directed to the polypeptide of the present invention, human cannabinol receptor protein 11.
  • Another object of the present invention is to provide diagnosis and treatment of abnormalities related to human cannabinoid receptor protein 1 1 Methods of disease. Summary of invention
  • the present invention relates to an isolated polypeptide, which is of human origin and comprises: a polypeptide having the amino acid sequence of SEQ ID No. 2, or a conservative variant, biologically active fragment or derivative thereof.
  • the polypeptide is a polypeptide having the amino acid sequence of SEQ ID NO: 2.
  • the invention also relates to an isolated polynucleotide comprising a nucleotide sequence or a variant thereof selected from the group consisting of:
  • sequence of the polynucleotide is one selected from the group consisting of: (a) a sequence having positions 323-625 in SEQ ID NO: 1; and (b) a sequence having 1-1714 in SEQ ID NO: 1 Sequence of bits.
  • the present invention further relates to a vector, particularly an expression vector, containing the polynucleotide of the present invention; a host cell genetically engineered with the vector, including a transformed, transduced or transfected host cell; Host cell and method of preparing the polypeptide of the present invention by recovering the expression product.
  • the invention also relates to an antibody capable of specifically binding to a polypeptide of the invention.
  • the present invention also relates to a method for screening compounds that mimic, activate, antagonize or inhibit human cannabinol receptor protein 11 protein activity, which comprises utilizing the polypeptide of the present invention.
  • the invention also relates to compounds obtained by this method.
  • the present invention also relates to a method for in vitro detection of a disease or susceptibility to disease associated with abnormal expression of the human cannabinol receptor protein 1 1 protein, comprising detecting a mutation in the polypeptide or a sequence encoding a polynucleotide thereof in a biological sample, or Detection of the amount or biological activity of a polypeptide of the invention in a biological sample.
  • the invention also relates to a pharmaceutical composition
  • a pharmaceutical composition comprising a polypeptide of the invention or a mimetic thereof, an activator, an antagonist or an inhibitor, and a pharmaceutically acceptable carrier.
  • the present invention also relates to the preparation of the polypeptide and / or polynucleotide of the present invention for the treatment of neuropsychiatric disorders, immune diseases, development disorders, inflammation, various tumors, H IV infection, etc., especially for the treatment of mental disorders Use of active medicines for mental disorders or other diseases caused by abnormal expression of human cannabinoid receptor protein 1 1.
  • FIG. 1 is a comparison diagram of gene chip expression profiles of human cannabinol receptor protein 11 and human central cannabinol receptor of the present invention.
  • the upper graph is a graph of the expression profile of human cannabinol receptor protein 11, and the lower graph is the graph of the expression profile of human central cannabinol receptor.
  • Figure 2 is a polyacrylamide gel electrophoresis image (SDS-PAGE) of the isolated human cannabinol receptor protein 11.
  • lKDa is the molecular weight of the protein.
  • the arrow indicates the isolated protein band.
  • Nucleic acid sequence refers to an oligonucleotide, a nucleotide or a polynucleotide and a fragment or part thereof, and may also refer to a genomic or synthetic DNA or RNA, they can be single-stranded or double-stranded, representing the sense or antisense strand.
  • amino acid sequence refers to an oligopeptide, peptide, polypeptide or protein sequence and fragments or portions thereof.
  • amino acid sequence in the present invention relates to the amino acid sequence of a naturally occurring protein molecule, such "polypeptide” or “protein” does not mean to limit the amino acid sequence to a complete natural amino acid related to the protein molecule .
  • a “variant" of a protein or polynucleotide refers to an amino acid sequence having one or more amino acids or nucleotide changes or a polynucleotide sequence encoding it.
  • the changes may include deletions, insertions or substitutions of amino acids or nucleotides in the amino acid sequence or nucleotide sequence.
  • Variants can have "conservative" changes, in which the amino acid substituted has a structural or chemical property similar to the original amino acid, such as replacing isoleucine with leucine.
  • Variants can also have non-conservative changes, such as replacing glycine with tryptophan.
  • “Deletion” refers to the deletion of one or more amino acids or nucleotides in an amino acid sequence or nucleotide sequence.
  • Insertion means that a change in the amino acid sequence or nucleotide sequence results in an increase in one or more amino acids or nucleotides compared to a molecule that exists in nature.
  • Replacement refers to the replacement of one or more amino acids or nucleotides with different amino acids or nucleotides.
  • Bioactivity refers to a protein that has the structure, regulation, or biochemical function of a natural molecule.
  • immunologically active refers to the ability of natural, recombinant or synthetic proteins and fragments thereof to induce a specific immune response and to bind specific antibodies in a suitable animal or cell.
  • An "agonist” refers to a molecule that, when bound to human cannabinol receptor protein 11, can cause the protein to change, thereby regulating the activity of the protein.
  • Agonists can include proteins, nucleic acids, carbohydrates Or any other molecule that can bind human cannabinol receptor protein 11.
  • Antagonist refers to a molecule that, when combined with human cannabinol receptor protein 11, can block or modulate the biological or immunological activity of human cannabinol receptor protein 11.
  • Antagonists and inhibitors can include proteins, nucleic acids, carbohydrates or any other human cannabinol receptor protein
  • Regular refers to a change in the function of human cannabinol receptor protein 11, including an increase or decrease in protein activity, a change in binding properties, and any other biological, functional, or immune properties of human cannabinol receptor protein 11. change.
  • substantially pure ' means substantially free of other proteins, lipids, sugars or other substances with which it is naturally associated.
  • Those skilled in the art can purify human cannabinol receptor protein 11 using standard protein purification techniques. Basic The pure human cannabinol receptor protein 11 can generate a single main band on a non-reducing polyacrylamide gel. The purity of the human cannabinol receptor protein 11 polypeptide can be analyzed by amino acid sequence.
  • Complementary refers to the natural binding of polynucleotides by base-pairing under conditions of acceptable salt concentration and temperature.
  • sequence C-T-G-A
  • complementary sequence G-A-C-T.
  • the complementarity between two single-stranded molecules may be partial or complete.
  • the degree of complementarity between nucleic acid strands has a significant effect on the efficiency and strength of hybridization between nucleic acid strands.
  • “Homology” refers to the degree of complementarity and can be partially homologous or completely homologous.
  • Partial homology refers to a partially complementary sequence that at least partially inhibits hybridization of a fully complementary sequence to a target nucleic acid. This inhibition of hybridization can be detected by performing hybridization (Southern imprinting or Northern blotting, etc.) under conditions of reduced stringency. Substantially homologous sequences or hybridization probes can compete and inhibit the binding of fully homologous sequences to the target sequence under conditions of reduced stringency. This does not mean that the conditions of reduced stringency allow non-specific binding, because the conditions of reduced stringency require that the two sequences bind to each other as a specific or selective interaction.
  • Percent identity refers to the percentage of sequences that are identical or similar in the comparison of two or more amino acid or nucleic acid sequences. The percent identity can be determined electronically, such as by the MEGALIGN program (Lasergene sof tware package, DNASTAR, Inc., Mad Son Wis.). The MEGALIGN program can compare two or more sequences according to different methods, such as the Clus ter method (Hi gg ins, DG and PM Sharp (1988) Gene 73: 237-244). 0 The Cluster method checks all The distances arrange the groups of sequences into clusters. The clusters are then assigned in pairs or groups. The percent identity between two amino acid sequences such as sequence A and sequence B is calculated by the following formula:
  • Similarity refers to the degree of identical or conservative substitutions of amino acid residues at corresponding positions in the alignment of amino acid sequences.
  • Amino acids used for conservative substitution for example, negatively charged amino acids may include aspartic acid and glutamic acid; positively charged amino acids may include lysine and arginine; having an uncharged head group is Similar hydrophilic amino acids may include leucine, isoleucine and valine; glycine and alanine; asparagine and glutamine; serine and threonine; phenylalanine and tyrosine.
  • Antisense refers to a nucleotide sequence that is complementary to a particular DNA or RNA sequence.
  • Antisense strand refers to a nucleic acid strand that is complementary to a “sense strand.”
  • Derivative refers to HFP or a chemical modification of its nucleic acid. This chemical modification may be a substitution of a hydrogen atom with a fluorenyl, acyl or amino group. Nucleic acid derivatives can encode polypeptides that retain the main biological properties of natural molecules.
  • Antibody refers to a complete antibody molecule and its fragments, such as Fa,? ( ⁇ ') 2 and? It can specifically bind to the epitope of human cannabinol receptor protein 11.
  • a “humanized antibody” refers to an antibody in which the amino acid sequence of a non-antigen binding region is replaced to become more similar to a human antibody, but still retains the original binding activity.
  • isolated refers to the removal of matter from its original environment (for example, its natural environment if it is naturally occurring).
  • a naturally occurring polynucleotide or polypeptide is not isolated when it is present in a living thing, but the same polynucleotide or polypeptide is separated from some or all of the substances that coexist with it in the natural system.
  • Such a polynucleotide may be part of a vector, or such a polynucleotide or polypeptide may be part of a composition. Since the carrier or composition is not a component of its natural environment, they are still isolated.
  • isolated refers to the separation of a substance from its original environment (if it is a natural substance, the original environment is the natural environment).
  • polynucleotides and polypeptides in a natural state in a living cell are not isolated and purified, but the same polynucleotides or polypeptides are separated and purified if they are separated from other substances in the natural state .
  • isolated human cannabinol receptor protein 11 means that human cannabinol receptor protein 11 is substantially free of other proteins, lipids, sugars, or other substances with which it is naturally associated. Those skilled in the art can purify human cannabinol receptor protein 11 using standard protein purification techniques. Substantially pure polypeptides can produce a single main band on a non-reducing polyacrylamide gel. The purity of the human cannabinol receptor protein 11 peptide can be analyzed by amino acid sequence.
  • the present invention provides a new polypeptide, human cannabinol receptor protein 11, which is basically composed of SEQ ID It consists of the amino acid sequence shown in NO: 2.
  • the polypeptide of the present invention may be a recombinant polypeptide, a natural polypeptide, or a synthetic polypeptide, and preferably a recombinant polypeptide.
  • the polypeptides of the present invention can be naturally purified products or chemically synthesized products, or can be produced from prokaryotic or eukaryotic hosts (such as bacteria, yeast, higher plants, insects, and mammalian cells) using recombinant techniques. Depending on the host used in the recombinant production protocol, the polypeptide of the invention may be glycosylated, or it may be non-glycosylated. Polypeptides of the invention may also include or exclude starting methionine residues.
  • the invention also includes fragments, derivatives and analogs of human cannabinol receptor protein 11.
  • fragment refers to a polypeptide that substantially maintains the same biological function or activity of the human hemp alcohol receptor protein 11 of the present invention.
  • a fragment, derivative or analog of the polypeptide of the present invention may be: (I) a kind in which one or more amino acid residues are substituted with conservative or non-conservative amino acid residues (preferably conservative amino acid residues), and the substitution
  • the amino acid may or may not be encoded by a genetic codon; or ( ⁇ ) such a type in which one or more amino acid residues are substituted with other groups to include a substituent; or (III) such A type in which a mature polypeptide is fused to another compound (such as a compound that extends the half-life of a polypeptide, such as polyethylene glycol); or (IV) a type of polypeptide sequence in which an additional amino acid sequence is fused into a mature polypeptide ( Such as leader sequences or secreted sequences or sequences used to purify this polypeptide or protease sequences).
  • such fragments, and their derivatives and analogs are considered to be within the knowledge of those skilled in the art.
  • the present invention provides an isolated nucleic acid (polynucleotide), which basically consists of a polynucleotide encoding a polypeptide having the amino acid sequence of SEQ ID NO: 2.
  • the polynucleotide sequence of the present invention includes the nucleotide sequence of SEQ ID NO: 1.
  • the polynucleotide of the present invention is found from a cDNA library of human fetal brain tissue. It contains a polynucleotide sequence of 1,714 bases in length, and its open reading frame 323-625 encodes 100 amino acids.
  • this polypeptide has a similar expression profile to the human central cannabinol receptor, and it can be deduced that the human cannabinol receptor protein 11 has a similar function to the human central cannabinol receptor.
  • the polynucleotide of the present invention may be in the form of DNA or RNA.
  • DNA forms include cDNA, genomic DNA, or synthetic DNA.
  • DNA can be single-stranded or double-stranded.
  • DNA can be coding or non-coding.
  • the coding region sequence encoding a mature polypeptide may be the same as the coding region sequence shown in SEQ ID NO: 1 or a degenerate variant.
  • a "degenerate variant" refers to a nucleic acid sequence encoding a protein or polypeptide having SEQ ID NO: 2 but different from the coding region sequence shown in SEQ ID NO: 1 in the present invention.
  • the polynucleotide encoding the mature polypeptide of SEQ ID NO: 2 includes: only the coding sequence of the mature polypeptide; the coding sequence of the mature polypeptide and various additional coding sequences; the coding sequence of the mature polypeptide (and optional additional coding sequences); Coding sequence.
  • the term "polynucleotide encoding a polypeptide" is meant to include polynucleotides that encode such polypeptides and polynucleotides that include additional coding and / or noncoding sequences.
  • the invention also relates to variants of the polynucleotides described above, which encode polypeptides or fragments, analogs and derivatives of polypeptides having the same amino acid sequence as the invention.
  • Variants of this polynucleotide can be naturally occurring allelic variants or non-naturally occurring variants. These nucleotide variants include substitution variants, deletion variants, and insertion variants.
  • an allelic variant is an alternative form of a polynucleotide that may be a substitution, deletion, or insertion of one or more nucleotides, but does not substantially change the function of the polypeptide it encodes .
  • the invention also relates to a polynucleotide that hybridizes to the sequence described above (having at least 50%, preferably 70% identity, between the two sequences).
  • the present invention particularly relates to polynucleotides that can hybridize to the polynucleotides of the present invention under stringent conditions.
  • “strict conditions” means: (1) hybridization and elution at lower ionic strength and higher temperature, such as 0.2xSSC, 0.1% SDS, 60 ° C; or (2) added during hybridization Use a denaturant, such as 50% (v / v) formamide, 0.1% calf serum / 0.1% Ficoll, 42 ° C, etc .; or (3) the identity between the two sequences is at least 95% Above, more preferably 97% or more hybridization occurs.
  • the polypeptide encoded by the hybridizable polynucleotide has the same biological function and activity as the mature polypeptide shown in SEQ ID NO: 2.
  • nucleic acid fragments that hybridize to the sequences described above.
  • a "nucleic acid fragment” contains at least 10 nucleotides in length, preferably at least 20-30 nucleotides, more preferably at least 50-60 nucleotides, and most preferably at least 100 cores. Glycylic acid or more. Nucleic acid fragments can also be used in nucleic acid amplification techniques, such as PCR, to identify and / or isolate polynucleotides encoding human cannabinol receptor protein 11.
  • polypeptides and polynucleotides in the present invention are preferably provided in an isolated form and are more preferably purified to homogeneity.
  • the specific polynucleotide sequence encoding the human cannabinol receptor protein 11 of the present invention can be obtained by various methods.
  • polynucleotides are isolated using hybridization techniques well known in the art. These techniques include, but are not limited to: 1) hybridization of probes to genomic or cDNA libraries to detect homologous polynucleotide sequences, and 2) antibody screening of expression libraries to detect cloned polynucleosides with common structural characteristics Acid fragments.
  • the DNA fragment sequence of the present invention can also be obtained by the following methods: 1) isolating the double-stranded DNA sequence from the genomic DNA; 2) chemically synthesizing the DM sequence to obtain the double-stranded DNA of the polypeptide.
  • genomic DNA isolation is the least commonly used. Direct chemical synthesis of DNA sequences is often the method of choice. The more commonly used method is the isolation of cDNA sequences.
  • the standard method for isolating the cDNA of interest is to isolate mRNA from donor cells that overexpress the gene and perform reverse transcription to form a plasmid or phage cDNA library.
  • the construction of cDNA libraries is also a common method (Sambrook, et al., Molecular Cloning, A Laboratory Manual, Cold Spring Harbor Laboratory. New York, 1989).
  • Commercially available cDNA libraries are also available, such as different cDNA libraries from Clontech. When polymerase reaction technology is used in combination, even very small expression products can be cloned.
  • genes of the present invention can be selected from these cDNA libraries by conventional methods. These methods include (but are not limited to): (l) DNA-DNA or DNA-RNA hybridization; (2) the presence or absence of marker gene functions; (3) determination of the level of transcripts of human cannabinoid receptor protein 11; ( 4) Detecting gene-expressed protein products by immunological techniques or by measuring biological activity. The above methods can be used singly or in combination.
  • the probe used for hybridization is homologous to any part of the polynucleotide of the present invention, and its length is at least 10 nucleotides, preferably at least 30 nucleotides, more preferably At least 50 nucleotides, preferably at least 100 nucleotides.
  • the length of the probe is usually within 2000 nucleotides, preferably within 1000 nucleotides.
  • the probe used herein is usually a D sequence chemically synthesized based on the gene sequence information of the present invention.
  • the genes or fragments of the present invention can of course be used as probes.
  • DNA probes can be labeled with radioisotopes, fluorescein, or enzymes (such as alkaline phosphatase).
  • immunological techniques such as Western blotting, radioimmunoprecipitation, and enzyme-linked immunosorbent assay (ELISA) can be used to detect protein products expressed by the human cannabinol receptor protein 11 gene.
  • ELISA enzyme-linked immunosorbent assay
  • a method for amplifying DNA / RNA using PCR technology is preferably used to obtain the gene of the present invention.
  • the RACE method RACE-rapid cDNA end rapid amplification method
  • the primers used for PCR can be appropriately based on the polynucleotide sequence information of the present invention disclosed herein. Select and synthesize using conventional methods.
  • the amplified DNA / RNA fragments can be isolated and purified by conventional methods such as by gel electrophoresis.
  • polynucleotide sequence of the gene of the present invention or various DNA fragments and the like obtained as described above can be measured by a conventional method such as dideoxy chain termination method (Sanger et al. PNAS, 1977, 74: 5463-5467). Such polynucleotide sequences can also be determined using commercial sequencing kits and the like. In order to obtain the full-length cDNA sequence, sequencing needs to be repeated. Sometimes it is necessary to determine the cDNA sequence of multiple clones in order to splice into a full-length cDNA sequence.
  • the present invention also relates to a vector comprising the polynucleotide of the present invention, and a host cell that is genetically engineered using the vector of the present invention or directly using a human cannabinol receptor protein 11 coding sequence, and a recombinant technology for producing the polypeptide of the present invention. method.
  • a polynucleotide sequence encoding the human cannabinol receptor protein 11 can be inserted into a vector to constitute a recombinant vector containing the polynucleotide of the present invention.
  • vector refers to bacterial plasmids, phages, yeast plasmids, plant cell viruses, mammalian cell viruses such as adenoviruses, retroviruses, or other vectors well known in the art.
  • Vectors suitable for use in the present invention include, but are not limited to: T7 promoter-based expression vector (Rosenberg, et al.
  • pMSXND expression vector expressed in mammalian cells (Lee and Nathans, J Bio Chem. 263: 3521, 1988) and in insects A baculovirus-derived vector expressed in cells.
  • any plasmid and vector can be used to construct a recombinant expression vector.
  • An important feature of expression vectors is that they usually contain an origin of replication, a promoter, a marker gene, and translational regulatory elements.
  • Methods known to those skilled in the art can be used to construct expression vectors containing a DNA sequence encoding human cannabinol receptor protein 11 and appropriate transcriptional / translational regulatory elements. These methods include in vitro recombinant DNA technology, DNA synthesis technology, and in vivo recombination technology (Sambroook, et al. Molecular Cloning, a Laboratory Manual, Cold Spring Harbor Laboratory. New York, 1989).
  • the DNA sequence can be operably linked to an appropriate promoter in an expression vector to guide mRNA synthesis. Representative examples of these promoters are: the lac or trp promoter of E.
  • the expression vector also includes a ribosome binding site for translation initiation, a transcription terminator, and the like. Insertion of enhancer sequences into the vector will enhance its transcription in higher eukaryotic cells. Enhancers are cis-acting factors for DNA expression, usually about 10 to 300 base pairs, which act on promoters to enhance gene transcription. Examples include SV40 enhancers of 100 to 270 base pairs on the late side of the origin of replication, polyoma enhancers and adenovirus enhancers on the late side of the origin of replication.
  • the expression vector preferably contains one or more selectable marker genes to provide phenotypic traits for selection of transformed host cells, such as dihydrofolate reductase, neomycin resistance, and green for eukaryotic cell culture.
  • selectable marker genes to provide phenotypic traits for selection of transformed host cells, such as dihydrofolate reductase, neomycin resistance, and green for eukaryotic cell culture.
  • GFP fluorescent protein
  • tetracycline or ampicillin resistance for E. coli.
  • a polynucleotide encoding human cannabinol receptor protein 11 or a recombinant vector containing the polynucleotide can be transformed or transduced into a host cell to constitute a genetically engineered host cell containing the polynucleotide or a recombinant vector.
  • host cell refers to a prokaryotic cell, such as a bacterial cell; or a lower eukaryotic cell, such as a yeast cell; or a higher eukaryotic cell, such as a mammalian cell.
  • Escherichia coli, Streptomyces bacterial cells such as Salmonella typhimurium
  • fungal cells such as yeast
  • plant cells insect cells
  • fly S2 or Sf9 animal cells
  • animal cells such as CH0, COS or Bowes melanoma cells.
  • Transforming a host cell with the DNA sequence of the present invention or a recombinant vector containing the DM sequence can be This is done using conventional techniques well known to those skilled in the art.
  • the host is a prokaryote such as E. coli
  • competent cells capable of DNA uptake can be in the exponential growth phase were harvested, treated with (Method 12, using the procedure well known in the art.
  • Alternative is MgC l 2.
  • transformation can also be performed by electroporation.
  • the following DNA transfection methods can be used: calcium phosphate co-precipitation method, or conventional mechanical methods such as microinjection, electroporation, and liposomes Packaging, etc.
  • polynucleotide sequence of the present invention can be used to express or produce recombinant human cannabinol receptor protein 11 (Scence, 1984; 224: 1431). Generally, the following steps are taken:
  • the medium used in the culture may be selected from various conventional mediums. Culture is performed under conditions suitable for host cell growth. After the host cells have grown to an appropriate cell density, the selected promoter is induced by a suitable method (such as temperature conversion or chemical induction), and the cells are cultured for a period of time.
  • a suitable method such as temperature conversion or chemical induction
  • the recombinant polypeptide may be coated in a cell, expressed on a cell membrane, or secreted outside the cell. If necessary, the recombinant protein can be isolated and purified by various separation methods using its physical, chemical and other properties. These methods are well known to those skilled in the art. These methods include, but are not limited to: conventional renaturation treatment, protein precipitant treatment (salting out method), centrifugation, osmotic disruption, ultrasonic treatment, ultracentrifugation, molecular sieve chromatography (gel filtration), adsorption chromatography, ion Exchange chromatography, high performance liquid chromatography (HPLC) and various other liquid chromatography techniques and combinations of these methods.
  • conventional renaturation treatment protein precipitant treatment (salting out method), centrifugation, osmotic disruption, ultrasonic treatment, ultracentrifugation, molecular sieve chromatography (gel filtration), adsorption chromatography, ion Exchange chromatography, high performance liquid
  • polypeptide of the present invention and the antagonists, agonists and inhibitors of the polypeptide can be directly used in the treatment of diseases, for example, it can treat malignant tumors, adrenal deficiency, skin diseases, various inflammations, H IV infections and immunological diseases.
  • cannabinol receptor proteins There are two types of cannabinol receptor proteins, the central cannabinol receptor and the cannabis alcohol receptor, which are widely present in the body.
  • the cannabinol receptor protein is expressed in human central nervous system, brain, heart, prostate, testis and other tissues; while the cannabinol receptor protein is not expressed in the central nervous system, it is relatively more in the immune system. High expression. Both play important intermediary regulatory roles in the development and action of the above-mentioned various tissues, respectively.
  • the central cannabinol receptor protein mainly mediates the pharmacological activity of cannabis in the body, and its abnormal expression will directly affect the function of cannabis in the body, thereby triggering various related nervous system disorders.
  • Diseases such as Touette's syndrome, obsessive-compulsive behavior disorder, Parkinson's syndrome, Alzheimer's disease, etc .
  • the cannabinol receptor protein is highly expressed in the immune system of the body, which is sensitive to pertussis toxin
  • the GTP-binding protein acts synergistically to regulate the activity of adenylate cyclase in the body, and in turn regulate various related immune system responses.
  • the mutation or abnormal expression of this protein will directly lead to the normal progress of some immune system reactions in the body, and then cause various related immune system disorders and inflammatory reactions in various tissues and cells.
  • the expression profile of the polypeptide of the present invention is consistent with the expression profile of the human cannabinol receptor protein, and both have similar biological functions. It mainly mediates the pharmacological activity of cannabis in the body and is important for the regulation of neurotransmitters. In addition, it is also important for the regulation of the body's immune system and for the regulation of growth and development. Its abnormal expression is closely related to the occurrence of the pathological process of the above-mentioned tissue system, and produces related diseases.
  • the abnormal expression of the human cannabinol receptor protein 1 1 of the present invention will produce various diseases, especially neuropsychiatric disorders, immune diseases, embryonic development disorders, growth disorders, inflammation, various Cancer, these diseases include but are not limited to:
  • Neuropsychiatric disorders Alzheimer's disease, Parkinson's disease, chorea, depression, amnesia, Huntington's disease, epilepsy, migraine, multiple sclerosis, schizophrenia, depression, neurasthenia, nerves Muscle disease, neurocutaneous syndrome, trigeminal neuralgia, facial paralysis
  • Immune diseases Systemic lupus erythematosus, rheumatoid arthritis, bronchial asthma, urticaria, specific dermatitis, post-infection myocarditis, scleroderma, myasthenia gravis, Guillain-Barre syndrome, common variable immunodeficiency disease , Primary B-lymphocyte immunodeficiency disease, Acquired immunodeficiency syndrome
  • Fetal developmental disorders neural tube insufficiency, brain developmental abnormalities, neuronal migration disorders, congenital abortion, cleft palate, limb absentness, limb differentiation disorders, atrial septal defect, neural tube defects, congenital hydrocephalus, congenital glaucoma Or cataract, congenital deafness
  • Growth and development disorders mental retardation, brain development disorders, skin, fat and muscular dysplasia, bone and joint dysplasia, various metabolic deficiencies, stunting, dwarfism, Cushing syndrome, Sexual retardation
  • Tumors of various tissues neuroblastoma, astrocytoma, ependymoma, glioblastoma, neurofibromatosis, gastric cancer, liver cancer, lung cancer, esophageal cancer, breast cancer, leukemia, lymphoma, thyroid tumor, uterus Myoma
  • Inflammation chronic active hepatitis, sarcoidosis, polymyositis, chronic rhinitis, chronic gastritis, cerebrospinal multiple sclerosis, glomerulonephritis, myocarditis, cardiomyopathy, atherosclerosis, gastric ulcer, cervicitis, Various infectious inflammations Abnormal expression of the human cannabinol receptor protein 11 of the present invention may also cause certain genetic diseases and the like.
  • the polypeptide of the present invention and the antagonists, agonists and inhibitors of the polypeptide can be directly used in the treatment of diseases, for example, it can treat various diseases, especially neuropsychiatric disorders, immune diseases, embryonic development disorders, growth and development disorders. Disease, inflammation, various tumors, certain hereditary diseases, etc.
  • the polypeptide of the present invention and the antagonists, agonists and inhibitors of the polypeptide can be directly used for the treatment of mental disorders caused by psychoactive drugs,
  • the invention also provides methods for screening compounds to identify agents that increase (agonist) or suppress (antagonist) human cannabinol receptor protein 11.
  • Agonists enhance biological functions such as human cannabinoid receptor protein 11 to stimulate cell proliferation, and antagonists prevent and treat disorders related to excessive cell proliferation, such as various cancers.
  • mammalian cells or a membrane preparation expressing human cannabinol receptor protein 11 can be cultured with labeled human cannabinol receptor protein 11 in the presence of a drug. The ability of the drug to increase or block this interaction is then determined.
  • Antagonists of human cannabinol receptor protein n include antibodies, compounds, receptor deletions, and the like that have been screened. Antagonists of human cannabinol receptor protein 11 can bind to human cannabinol receptor protein 11 and eliminate its function, or inhibit the production of the polypeptide, or bind to the active site of the polypeptide so that the polypeptide cannot exert its biology Features.
  • human cannabinol receptor protein 11 When screening compounds as antagonists, human cannabinol receptor protein 11 can be added to bioanalytical assays to determine whether a compound is a compound by measuring its effect on the interaction between human cannabinol receptor protein 11 and its receptor. Antagonist. Receptor deletions and analogs that act as antagonists can be screened in the same way as for screening compounds described above. Polypeptide molecules capable of binding to human cannabinol receptor protein 11 can be obtained by screening a random peptide library composed of various possible combinations of amino acids bound to a solid phase. When screening, the human cannabinol receptor protein 11 molecule should generally be labeled.
  • the present invention provides a method for producing antibodies using polypeptides, and fragments, derivatives, analogs or cells thereof as antigens. These antibodies can be polyclonal or monoclonal antibodies.
  • the invention also provides antibodies directed against human cannabinol receptor protein 11 epitopes. These antibodies include (but are not limited to): polyclonal antibodies, monoclonal antibodies, chimeric antibodies, single chain antibodies, Fab fragments, and fragments generated from Fab expression libraries.
  • Polyclonal antibodies can be produced by injecting human cannabinol receptor protein 11 directly into immunized animals (such as rabbits, mice, rats, etc.).
  • immunized animals such as rabbits, mice, rats, etc.
  • a variety of adjuvants can be used to enhance the immune response, including but not limited to Freund's Agent.
  • Techniques for preparing monoclonal antibodies to human cannabinol receptor protein 11 include, but are not limited to, hybridoma technology (Kohler and Miste in. Nature, 1975, 256: 495-497), triple tumor technology, human beta- Cell hybridoma technology, EBV-hybridoma technology, etc.
  • Synthetic antibodies can be produced using existing techniques (Morr i son et al, PNAS, 1985, 81: 6851). 0 The existing techniques for producing single chain antibodies (US Pat No. 4946778) can also be used to produce anti-human cannabinol receptors. Single-chain antibody to protein 11.
  • Antibodies to human cannabinol receptor protein 11 can be used in immunohistochemistry to detect human cannabinol receptor protein 11 in biopsy specimens.
  • Monoclonal antibodies that bind to human cannabinol receptor protein 11 can also be labeled with radioisotopes and injected into the body to track their location and distribution.
  • This radiolabeled antibody can be used as a non-invasive diagnostic method to locate tumor cells and determine whether there is metastasis.
  • Antibodies can also be used to design immunotoxins that target a particular part of the body.
  • human cannabinol receptor protein 11 high affinity monoclonal antibodies can covalently bind to bacterial or phytotoxins (such as diphtheria toxin, ricin, ormosine, etc.).
  • a common method is to attack the amino group of an antibody with a thiol cross-linking agent such as SPDP and bind the toxin to the antibody through the exchange of disulfide bonds.
  • This hybrid antibody can be used to kill human cannabinol receptor protein 11 positive cell.
  • the antibodies in the present invention can be used to treat or prevent diseases related to human cannabinol receptor protein 11.
  • Administration of an appropriate dose of the antibody can stimulate or block the production or activity of human cannabinol receptor protein 11.
  • the invention also relates to a diagnostic test method for quantitative and localized detection of human cannabinol receptor protein 11 levels.
  • tests are well known in the art and include FISH assays and radioimmunoassays.
  • the levels of human cannabinol receptor protein 11 detected in the test can be used to explain the importance of human cannabinol receptor protein 11 in various diseases and to diagnose diseases in which human cannabinol receptor protein 11 plays a role.
  • polypeptide of the present invention can also be used for peptide mapping analysis.
  • the polypeptide can be specifically cleaved by physical, chemical or enzymatic analysis, and subjected to one-dimensional or two-dimensional or three-dimensional gel electrophoresis analysis, more preferably mass spectrometry analysis.
  • human cannabinol receptor protein 11 can also be used for a variety of therapeutic purposes. Gene therapy technology can be used to treat abnormal cell proliferation, development or metabolism caused by the non-expression or abnormal / inactive expression of human cannabinoid receptor protein 11.
  • Recombinant gene therapy vectors (such as viral vectors) can be designed to express mutated human cannabinol receptor protein ⁇ to inhibit endogenous human cannabinol receptor protein 11 activity.
  • a variant human cannabinol receptor protein 11 may be a shortened human cannabinol receptor protein 11 that lacks a signaling functional domain. Although it can bind to downstream substrates, it lacks signaling activity.
  • the recombinant gene therapy vector can be used to treat diseases caused by abnormal expression or activity of human cannabinoid receptor protein 11.
  • Virus-derived expression vectors such as retrovirus, adenovirus, adenovirus-associated virus, herpes simplex virus, parvovirus and the like can be used to transfer a polynucleotide encoding human cannabinol receptor protein 11 into cells.
  • a method for constructing a recombinant viral vector carrying a polynucleotide encoding a human cannabinol receptor protein 11 can be found in existing literature (Sambrook, eta l.).
  • recombinantly encoded human cannabinol receptor protein 11 Polynucleotides can be packaged into liposomes and transferred into cells.
  • Methods for introducing a polynucleotide into a tissue or cell include: directly injecting the polynucleotide into a tissue in vivo; or introducing the polynucleotide into a cell in vitro through a vector (such as a virus, phage, or plasmid), and then transplanting the cell Into the body and so on.
  • a vector such as a virus, phage, or plasmid
  • Oligonucleotides including antisense RM and DNA
  • ribozymes that inhibit human cannabinol receptor protein 11 mRNA are also within the scope of the present invention.
  • a ribozyme is an enzyme-like RNA molecule that can specifically decompose specific RNA. Its mechanism of action is that the ribozyme molecule specifically hybridizes with a complementary target RNA for endonucleation.
  • Antisense RNA, DNA, and ribozymes can be obtained using any existing RNA or DNA synthesis technology, such as solid-phase phosphoramidite chemical synthesis to synthesize oligonucleotides.
  • Antisense RNA molecules can be obtained by in vitro or in vivo transcription of a DNA sequence encoding the RNA.
  • This DNA sequence has been integrated downstream of the RM polymerase promoter of the vector.
  • it can be modified in a variety of ways, such as increasing the sequence length of the two hydrazones, and the linkage between ribonucleosides using phosphate or peptide bonds instead of phosphodiester bonds.
  • the polynucleotide encoding human cannabinol receptor protein 1 1 can be used for the diagnosis of diseases related to human cannabinol receptor protein 1 1.
  • the polynucleotide encoding human cannabinol receptor protein 1 1 can be used to detect the expression of human cannabinol receptor protein 1 1 or the abnormal expression of human cannabinol receptor protein 1 1 in a disease state.
  • the DNA sequence encoding human cannabinol receptor protein 1 1 can be used to hybridize biopsy specimens to determine the expression of human cannabinol receptor protein 11.
  • Hybridization techniques include Southern blotting, Nor thern blotting, and in situ hybridization.
  • polynucleotides of the present invention can be used as probes to be fixed on a microarray (Microray) or a DNA chip (also known as a "gene chip") for analyzing differential expression analysis of genes and genetic diagnosis in tissues .
  • a microarray Microray
  • a DNA chip also known as a "gene chip”
  • Human cannabinol receptor protein 11 specific primers for RNA-polymerase chain reaction (RT-PCR) in vitro amplification can also detect human cannabinol receptor protein 1 1 transcripts.
  • Detection of mutations in the human cannabinol receptor protein 1 1 gene can also be used to diagnose human cannabinol receptor protein 11 -related diseases.
  • Human cannabinol receptor protein 11 mutations include point mutations, translocations, deletions, recombinations, and any other abnormalities compared to the normal wild-type human cannabinol receptor protein 1 1 DNA sequence. Mutations can be detected using existing techniques such as Southern blotting, DNA sequence analysis, PCR and in situ hybridization. In addition, mutations may affect the expression of proteins. Therefore, Nor thern blotting and Western blotting can be used to indirectly determine whether a gene is mutated.
  • sequences of the invention are also valuable for chromosome identification. This sequence will specifically target a specific position on a human chromosome and can hybridize to it. Currently, specific sites for each gene on the chromosome need to be identified. Only few chromosome markers based on actual sequence data (repeat polymorphisms) are available For marking chromosome positions. According to the present invention, in order to associate these sequences with disease-related genes, an important first step is to locate these DNA sequences on a chromosome.
  • PCR primers (preferably 15-35bp) are prepared based on cDNA, and the sequences can be mapped to hybrid cells stained with human genes of those corresponding primers to produce amplified fragments.
  • the PCR localization method for hybrid cells of somatic cells is a quick way to locate DNA to specific chromosomes.
  • oligonucleotide primers of the present invention in a similar manner, a set of fragments from a specific chromosome or a large number of genomic clones can be used to achieve sublocalization.
  • Other similar strategies that can be used for chromosomal localization include in situ hybridization, chromosome pre-screening with labeled flow sorting, and pre-selection of hybridization to construct chromosome-specific cDNA libraries.
  • Fluorescent in situ hybridization of cDNA clones with metaphase chromosomes allows precise chromosomal localization in one step.
  • FISH Fluorescent in situ hybridization
  • the difference in cDNA or genomic sequence between the affected and unaffected individuals needs to be determined. If a mutation is observed in some or all diseased individuals and the mutation is not observed in any normal individuals, the mutation may be the cause of the disease. Comparing affected and unaffected individuals usually involves first looking for structural changes in chromosomes, such as deletions or translocations that are visible at the chromosomal level or detectable with cDNA sequence-based PCR. According to the resolution capabilities of current physical mapping and gene mapping technology, the cDNA accurately mapped to the chromosomal region associated with the disease can be one of 50 to 500 potentially pathogenic genes (assuming 1 megabase mapping resolution Capacity and each 20kb corresponds to a gene).
  • the polypeptides, polynucleotides and mimetics, agonists, antagonists and inhibitors of the present invention can be used in combination with a suitable pharmaceutical carrier.
  • suitable pharmaceutical carrier can be water, glucose, ethanol, salts, buffers, glycerol, and combinations thereof.
  • the composition comprises a safe and effective amount of the polypeptide or antagonist, and carriers and excipients which do not affect the effect of the drug. These compositions can be used as drugs for the treatment of diseases.
  • the present invention also provides a kit or kit containing one or more containers containing one or more ingredients of the pharmaceutical composition of the present invention.
  • containers containing one or more ingredients of the pharmaceutical composition of the present invention.
  • instructional instructions given by government regulatory agencies that manufacture, use, or sell pharmaceuticals or biological products, which instructions reflect production, use Or a government agency that sells it allows it to be administered to humans.
  • the polypeptides of the invention can be used in combination with other therapeutic compounds.
  • the pharmaceutical composition can be administered in a convenient manner, such as by a topical, intravenous, intraperitoneal, intramuscular, subcutaneous, intranasal or intradermal route of administration.
  • Human cannabinol receptor protein 11 is administered in an amount effective to treat and / or prevent a specific indication.
  • the amount and range of human cannabinol receptor protein 11 administered to a patient will depend on many factors, such as the mode of administration, the health conditions of the person to be treated, and the judgment of the diagnostician. Examples
  • RNA Human fetal brain total RNA was extracted by one-step method with guanidine isothiocyanate / phenol / chloroform.
  • Poly (A) mRNA was isolated from total RNA using Quik raRNA Isolation Kit (Qiegene). 2ug poly (A) mRNA forms cDM by reverse transcription.
  • the Smart cDNA cloning kit purchased from CI on tech was used to insert the cDNA fragment into the multiple cloning site of pBSK (+) vector (Clontech) to transform DH5 ⁇ .
  • the bacteria formed a cDNA library.
  • the Dye terminate cycle reaction ion sequencing kit Perkin-Elmer
  • ABI 377 automatic sequencer Perkin-Elmer
  • the inserted cDNA fragments contained in this clone were determined in both directions by synthesizing a series of primers.
  • CDNA was synthesized using fetal brain total RNA as a template and oligo-dT as a primer for reverse transcription reaction. After purification with Qiagene's kit, the following primers were used for PCR amplification:
  • Priraerl 5'— CGTAATTCATAAACCAAAATTCCT-3, (SEQ ID NO: 3)
  • Primer2 5'- AGTAATACCACATATTTATTATAT -3 '(SEQ ID NO: 4)
  • Primerl is a forward sequence starting from the 1st lbp at the 5 ′ end of SEQ ID NO: 1;
  • Primer2 is the 3, terminal reverse sequence of SEQ ID NO: 1.
  • Amplification conditions 50 mmol / L KC1, 10ramol / L Tris-HCl, pH8.5, 1.5mraol / L MgCl 2 , 200 mol / L dNTP, lOpmol primer, 1U Taq in a reaction volume of 50 ⁇ 1 DM polymerase (Clontech).
  • the reaction was performed on a PE9600 DM thermal cycler (Perkin-Elmer) for 25 cycles under the following conditions: 94 ° C 30sec; 55. C 30sec; 72 ° C 2min.
  • ⁇ -actin was set as a positive control and template blank was set as a negative control.
  • the amplified product was purified using a QIAGEN kit, and ligated to a pCR vector (Invitrogen product) using a TA cloning kit.
  • the DNA sequence analysis results showed that the DNA sequence of the PCR product was exactly the same as l-1714bp shown in SEQ ID NO: 1.
  • Example 3 Northern blot analysis of human cannabinol receptor protein 11 gene expression
  • RNA extraction in one step [Anal. Biochem 1987, 162, 156-159] 0
  • This method involves acid guanidinium thiocyanate-chloroform extraction. That is, the tissue is homogenized with 4M guanidine isothiocyanate-25m sodium citrate, 0.2M sodium acetate (pH4.0), and 1 time volume of phenol and 1/5 volume of chloroform-isoamyl alcohol (49: 1 ), Mix and centrifuge. Aspirate the aqueous layer, add isopropanol (0.8 vol) and centrifuge the mixture to obtain RNA precipitate. The resulting RNA pellet was washed with 70% ethanol, dried and dissolved in water.
  • a 32P-labeled probe (about 2 x 10 6 cpm / ml) was hybridized with a nitrocellulose membrane to which RNA was transferred at 42 ° C overnight in a solution containing 50% formamide-25mM KH 2 P0 4 (pH 7.4) -5 x SSC-5 x Denhardt's solution and 20 (g / ml salmon sperm DNA. After hybridization, the filter was washed in 1 x SSC-0.1 ° /. SDS at 55 ° C for 30 min. Then, Phosphor Imager was used for analysis and quantification.
  • Example 4 In vitro expression, isolation and purification of recombinant human cannabinol receptor protein 11.
  • Primer3 5'- CATGCTAGCATGGTGGAAGGCAAGGAGGAGCAA -3 '(Seq ID No: 5)
  • Primer4 5'- CATGGATCCCTAACTTGCTTTTGATTTTACAGG -3, (Seq ID No: 6)
  • the 5' ends of these two primers contain Nhel and BamHI restriction sites, respectively.
  • the coding sequences for the 5 ,, and 3 'ends of the gene of interest are followed, respectively.
  • the Nhel and BamHI restriction sites correspond to the selectivity within the expression vector plasmid pET-28b (+) (Novagen, Cat. No. 69865.3). Digestion site.
  • PCR reaction conditions were: 1 in a total volume of 50 ⁇ plasmid pBS-0266g01 containing 10pg, primer Pr imer- 3 Pr imer- 4 minutes and another ij is l Opmol, Advantage po lymerase Mix ( Clontech Products) 1 ⁇ 1.
  • Cycle parameters 94. C 20s, 60. C 30s, 68. C 2 min, a total of 25 cycles. Nhel and BamHI were used to double-digest the amplified product and plasmid pET-28 (+), respectively, and large fragments were recovered and ligated with T4 ligase.
  • the ligation product was transformed into E. coli DH5 CC using the calcium chloride method. After being cultured overnight in LB plates containing kanamycin (final concentration 30 g / ml), positive clones were screened by colony PCR and sequenced. A positive clone (PET-0266g01) with the correct sequence was selected, and the recombinant plasmid was transformed into E. coli BL21 (DE3) plySs (product of Novagen) using the calcium chloride method.
  • the following peptides specific for human cannabinol receptor protein 11 were synthesized using a peptide synthesizer (product of PE company): NH2-Met-Va l-Glu-Gly-Lys-Glu-Glu-G ln-Va l-Pro-Ser -Tyr-Met-Gly-Gly-C00H (SEQ ID NO: 7).
  • the polypeptide is coupled with hemocyanin and bovine serum albumin to form a complex, respectively.
  • Suitable oligonucleotide fragments selected from the polynucleotides of the present invention are used as hybridization probes in a variety of ways.
  • the probes can be used to hybridize to genomic or cDNA libraries of normal tissue or pathological tissue from different sources to Identifying whether it contains the polynucleotide sequence of the present invention and detecting a homologous polynucleotide sequence, further The probe is used to detect whether the expression of the polynucleotide sequence of the present invention or a homologous polynucleotide sequence thereof in cells of normal tissues or pathological tissues is abnormal.
  • the purpose of this embodiment is to select a suitable oligonucleotide fragment from the polynucleotide SEQ ID NO: 1 of the present invention as a hybridization probe, and to identify whether some tissues contain the polynucleoside of the present invention by a filter hybridization method.
  • Filter hybridization methods include dot blotting, Southern imprinting, Northern blotting, and copying methods. They all use the same steps to immobilize the polynucleotide sample to be tested on the filter.
  • the sample-immobilized filter is first pre-hybridized with a probe-free hybridization buffer to saturate the non-specific binding site of the sample on the filter with the carrier and the synthesized polymer.
  • the pre-hybridization solution is then replaced with a hybridization buffer containing labeled probes and incubated to hybridize the probes to the target nucleic acid.
  • the unhybridized probes are removed by a series of membrane washing steps.
  • This embodiment uses higher-intensity washing conditions (such as lower salt concentration and higher temperature) to reduce the hybridization background and retain only strong specific signals.
  • the probes used in this embodiment include two types: the first type of probes are oligonucleotide fragments that are completely the same as or complementary to the polynucleotide SEQ ID NO: 1 of the present invention; the second type of probes are partially related to the present invention
  • the polynucleotide SEQ ID NO: 1 is the same or complementary oligonucleotide fragment.
  • the dot blot method is used to fix the sample on the filter membrane. Under the high-intensity washing conditions, the first type of probe and the sample have the strongest hybridization specificity and are retained.
  • oligonucleotide fragments for use as hybridization probes from the polynucleotide SEQ ID NO: 1 of the present invention should follow the following principles and several aspects to be considered:
  • the preferred range of probe size is 18-50 nucleotides
  • GC content is 30% -70%, if it exceeds, non-specific hybridization increases
  • Those that meet the above conditions can be used as primary selection probes, and then further computer sequence analysis, including the primary selection probe and its source sequence region (ie, SEQ ID NO: 1) and other known genomic sequences and their complements For homology comparison of the regions, if the homology with the non-target molecular region is greater than 85% or there are more than 15 consecutive bases, the primary probe should not be used generally;
  • Probe 1 which belongs to the first type of probe, is completely homologous or complementary to the gene fragment of SEQ ID NO: 1 (41Nt):
  • Probe 2 which belongs to the second type of probe, is equivalent to the replacement mutant sequence of the gene fragment of SEQ ID NO: 1 or its complementary fragment (41Nt):
  • PBS phosphate buffered saline
  • step 8-13 are only used when contamination must be removed, otherwise step 14 can be performed directly.
  • NC membranes nitrocellulose membranes
  • Two NC membranes are required for each probe for subsequent experiments.
  • the film is washed with high-strength conditions and strength conditions, respectively.
  • the 32 P-Probe (the second peak is free ⁇ - 32 P-dATP) is prepared.
  • the sample membrane was placed in a plastic bag, and 3-10 mg of prehybridization solution (lOxDenhardt's; 6xSSC, 0.1 lrag / ml CT DNA (calf thymus DNA)) was added. After sealing the mouth of the bag, shake at 68 ° C for 2 hours.
  • prehybridization solution lOxDenhardt's; 6xSSC, 0.1 lrag / ml CT DNA (calf thymus DNA)
  • Gene chip or gene microarray is a new technology currently being developed by many national laboratories and large pharmaceutical companies. It refers to the orderly and high-density arrangement of a large number of target gene fragments on glass, The data is compared and analyzed on a carrier such as silicon using fluorescence detection and computer software to achieve the purpose of rapid, efficient, and high-throughput analysis of biological information.
  • the polynucleotide of the present invention can be used as target DNA for gene chip technology for high-throughput research of new gene functions; finding and screening for tissue specificity New genes, especially those related to diseases such as tumors; Diagnosis of diseases, such as hereditary diseases. The specific method steps have been reported in the literature.
  • a total of 4,000 polynucleotide sequences of various full-length cDNAs are used as target DNA, including the polynucleotide of the present invention. They were amplified by PCR respectively. After purification, the concentration of the amplified product was adjusted to about 500 ng / ul, and spotted on a glass medium with a Cartesian 7500 spotting instrument (purchased from Cartesian, USA). The distance is 280 ⁇ . The spotted slides were hydrated and dried, cross-linked in a UV cross-linker, and dried after elution to fix the DNA on the glass slides to prepare chips. The specific method steps have been reported in the literature. The sample post-processing steps in this embodiment are:
  • Total mRNA was extracted from human mixed tissues and specific tissues (or stimulated cell lines) in one step, and mRNA was purified with Oligotex mRNA Midi Kit (purchased from QiaGen).
  • the fluorescent reagent Cy3dUTP 5-Araino-propargyl-2'-deoxyuridine 5'-triphate coupled to Cy3 fluorescent dye (purchased from Amersham Phamacia Biotech) was used to label mRNA of human mixed tissues, and the fluorescent reagent Cy5dUTP (5- Amino- propargyl-2'-deoxyuridine 5 '-tr iphate coupled to Cy5 fluorescent dye, purchased from Amersham Phamacia Biotech company, labeled the body's specific tissue (or stimulated cell line) mRNA, and purified the probe to prepare a probe.
  • Cy3dUTP 5-Araino-propargyl-2'-deoxyuridine 5'-triphate coupled to Cy3 fluorescent dye (purchased from Amersham Phamacia Biotech
  • the above specific tissues are thymus, testis, muscle, spleen, lung, skin, thyroid, liver, PMA + Ecv304 cell line, PMA-Ecv304 cell line, non-starved L02 cell line, Arsenic stimulated the L02 cell line and prostate tissue for 1 hour. Based on these 13 Cy3 / Cy5 ratios, draw a bar graph ( Figure 1). It can be seen from the figure that the expression profiles of human cannabinol receptor protein 11 and human central cannabinol receptor according to the present invention are very similar.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biochemistry (AREA)
  • Genetics & Genomics (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Toxicology (AREA)
  • Immunology (AREA)
  • Biophysics (AREA)
  • General Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Medicinal Chemistry (AREA)
  • Molecular Biology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Cell Biology (AREA)
  • Peptides Or Proteins (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Description

一种新的多肽——人大麻醇夢休蛋白 11和编码这种多肽的多核苷酸
本发明属于生物技术领域, 具体地说, 本发明描述了一种新的多肽——人 大麻醇受体蛋白 11, 以及编码此多肽的多核苷酸序列。 本发明还涉及此多核 苷酸和多肽的制备方法和应用。 技术背景
大麻醇受体蛋白是生物体内广泛存在的一种蛋白受体, 其在生物的脑、 心 脏、 肺、 前列腺、 卵巢等组织中均有表达。 在人体内存在着两种不同的大麻醇 受体蛋白, 中枢大麻醇受体及周遍大麻醇受体。 其中中枢大麻醇受体蛋白在人 的中枢神经系统、 脑、 心脏、 前列腺、 睾丸等组织中均有表达; 而周遍大麻醇 受体蛋白在中枢神经系统无表达, 其在免疫系统中则有较高的表达量。 两者分 别在上述各种组织的发育与作用过程中发挥重要的中间调控作用 [GaliegueS., Mary S. et al. , 1995, Eur J Biochem, 232: 54-61] .
中枢大麻醇受体蛋白主要介导大麻在体内的药理活性, 其表达异常将直接 影响大麻在体内的功能, 从而引发各种相关的神经系统紊乱性疾病, 如图雷特 氏综合症、 强迫行为紊乱症、 帕金森综合症、 早老性痴呆等; 周遍大麻醇受体 蛋白则在生物体的免疫系统中高表达, 该蛋白通过与百曰咳毒素敏感的 GTP结 合蛋白协同作用, 以调控体内腺苷酸环化酶的作用活性, 进而调控各种相关的 免疫系统反应。 该蛋白的突变或表达异常将直接导致体内一些免疫系统反应的 正常进行, 进而引发各种相关的免疫系统紊乱型疾病及各组织、 细胞的炎症反 应 [Kaminski N. E. , 1998, Toxicol Lett, 28: 59-63] 0
1995 年, Galiegue 等人从人体内分别克隆得到了一中枢大麻醇受体及一 周遍大麻醇受体, 并对两者的表达与功能进行了分析。 同年, Bouaboula 等人 又从人体内分别克隆得到了一中枢大麻醇受体及周遍大麻醇受体, 并发现, 两 者与 已知的大麻醇受体蛋白具有相似的结构与功能特征 [Bouaboula M. ,Bourrie B. et al. , 1995, J Biol Chem, 270: 13973-13980]„ 研究发现, 所 有的大麻醇受体蛋白其蛋白序列中均含有七个跨膜结构域, 这些结构域是受体 与相关蛋白结合发挥体内作用活性的中心区域。 这些结构域中特殊氨基酸位点 的突变或表达异常将导致受体蛋白的作用异常, 这通常与生物体内一些神经系 统紊乱性疾病及免疫系统疾病的发生密切相关。 由上可知, 大麻醇受体蛋白在生物体内参与调控多种重要的神经系统及免 疫系统发育及作用过程, 其中中枢大麻醇受体主要在神经系统的发育过程起重 要的调节作用, 而周遍大麻醇受体则在免疫系统中发挥重要作用。 中枢大麻醇 受体的突变或表达异常通常将导致体内神经系统发育及功能的异常, 其通常与 各种相关的神经系统紊乱型疾病的发生密切相关。 该蛋白还可用于诊断及治疗 各种相关的疾病。
通过基因芯片的分析发现, 在胸腺、 睾丸、 肌肉、 脾脏、 肺、 皮肤、 甲状 腺、 肝、 PMA+的 Ecv304 细胞株、 PMA -的 Ecv304 细胞株、 未饥饿的 L02 细胞 株、 砷刺激 1小时的 L02细胞株以及前列腺组织中, 本发明的多肽的表达谱与 人中枢大麻醇受体的表达谱非常近似, 因此二者功能也可能类似。 本发明被命 名为人大麻醇受体蛋白 n。
由于如上所述人大麻醇受体蛋白 n 蛋白在调节细胞分裂和胚胎发育等机 体重要功能中起重要作用, 而且相信这些调节过程中涉及大量的蛋白, 因而本 领域中一直需要鉴定更多参与这些过程的人大麻醇受体蛋白 1 1 蛋白, 特别是 鉴定这种蛋白的氨基酸序列。 新人大麻醇受体蛋白 1 1 蛋白编码基因的分离也 为研究确定该蛋白在健康和疾病状态下的作用提供了基础。 这种蛋白可能构成 开发疾病诊断和 /或治疗药的基础, 因此分离其编码 DM是非常重要的。 发明目的
本发明的一个目的是提供分离的新的多肽——人大麻醇受体蛋白 1 1 以及 其片段、 类似物和衍生物。
本发明的另一个目的是提供编码该多肽的多核苷酸。
本发明的另一个目的是提供含有编码人大麻醇受体蛋白 1 1 的多核苷酸的 重组载体。
本发明的另一个目的是提供含有编码人大麻醇受体蛋白 1 1 的多核苷酸的 基因工程化宿主细胞。
本发明的另一个目的是提供生产人大麻醇受体蛋白 1 1的方法。
本发明的另一个目的是提供针对本发明的多肽——人大麻醇受体蛋白 11 的抗体。
本发明的另一个目的是提供了针对本发明多肽——人大麻醇受体蛋白 11 的模拟化合物、 拮抗剂、 激动剂、 抑制剂。
本发明的另一个目的是提供诊断治疗与人大麻醇受体蛋白 1 1 异常相关的 疾病的方法。 发明概要
本发明涉及一种分离的多肽, 该多肽是人源的, 它包含: 具有 SEQ ID No. 2 氨基酸序列的多肽、 或其保守性变体、 生物活性片段或衍生物。 较佳地, 该 多肽是具有 SEQ ID NO: 2氨基酸序列的多肽。
本发明还涉及一种分离的多核苷酸, 它包含选自下组的一种核苷酸序列或 其变体:
(a)编码具有 SEQ ID No. 2氨基酸序列的多肽的多核苷酸;
(b)与多核苷酸(a)互补的多核苷酸;
(c)与(a)或(b)的多核苷酸序列具有至少 70%相同性的多核苷酸。
更佳地, 该多核苷酸的序列是选自下组的一种: (a)具有 SEQ ID NO: 1 中 323- 625位的序列; 和(b)具有 SEQ ID NO: 1中 1-1714位的序列。
本发明另外涉及一种含有本发明多核苷酸的载体, 特别是表达载体; 一种 用该载体遗传工程化的宿主细胞, 包括转化、 转导或转染的宿主细胞; 一种包 括培养所述宿主细胞和回收表达产物的制备本发明多肽的方法。
本发明还涉及一种能与本发明多肽特异性结合的抗体。
本发明还涉及一种筛选的模拟、 激活、 拮抗或抑制人大麻醇受体蛋白 1 1蛋 白活性的化合物的方法, 其包括利用本发明的多肽。 本发明还涉及用该方法获 得的化合物。
本发明还涉及一种体外检测与人大麻醇受体蛋白 1 1 蛋白异常表达相关的疾 病或疾病易感性的方法, 包括检测生物样品中所述多肽或其编码多核苷酸序列中 的突变, 或者检测生物样品中本发明多肽的量或生物活性。
本发明也涉及一种药物组合物, 它含有本发明多肽或其模拟物、 激活剂、 拮 抗剂或抑制剂以及药学上可接受的载体。
本发明还涉及本发明的多肽和 /或多核苷酸在制备用于治疗神经精神紊乱 性疾病, 免疫性疾病, 发育紊乱症, 炎症, 各种肿瘤, H IV 感染等, 尤其是 用于治疗精神活性药物所致的精神障碍性疾病或其它由于人大麻醇受体蛋白 1 1 表达异常所引起疾病的药物的用途。
本发明的其它方面由于本文的技术的公开, 对本领域的技术人员而言是显而 易见的。 附图说明
下列附图用于说明本发明的具体实施方案, 而不用于限定由权利要求书所 界定的本发明范围。
图 1是本发明人大麻醇受体蛋白 11和人中枢大麻醇受体的基因芯片表达谱 比较图。 上图是人大麻醇受体蛋白 11的表达谱折方图, 下图是人中枢大麻醇受 体的表达谱折方图。
图 2为分离的人大麻醇受体蛋白 11的聚丙烯酰胺凝胶电泳图(SDS-PAGE )。 l lKDa为蛋白质的分子量。 箭头所指为分离出的蛋白条带。 发明内容
本说明书和权利要求书中使用的下列术语除非特别说明具有如下的含义: "核酸序列" 是指寡核苷酸、 核苷酸或多核苷酸及其片段或部分, 也可以 指基因组或合成的 DNA或 RNA , 它们可以是单链或双链的, 代表有义链或反义链。 类似地, 术语 "氨基酸序列" 是指寡肽、 肽、 多肽或蛋白质序列及其片段或部 分。 当本发明中的 "氨基酸序列" 涉及一种天然存在的蛋白质分子的氨基酸序 列时, 这种 "多肽" 或 "蛋白质" 不意味着将氨基酸序列限制为与所述蛋白质 分子相关的完整的天然氨基酸。
蛋白质或多核苷酸 "变体" 是指一种具有一个或多个氨基酸或核苷酸改变 的氨基酸序列或编码它的多核苷酸序列。 所述改变可包括氨基酸序列或核苷酸 序列中氨基酸或核苷酸的缺失、 插入或替换。 变体可具有 "保守性" 改变, 其 中替换的氨基酸具有与原氨基酸相类似的结构或化学性质, 如用亮氨酸替换异 亮氨酸。 变体也可具有非保守性改变, 如用色氨酸替换甘氨酸。
"缺失" 是指在氨基酸序列或核苷酸序列中一个或多个氨基酸或核苷酸的 缺失。
"插入" 或 "添加" 是指在氨基酸序列或核苷酸序列中的改变导致与天然存 在的分子相比, 一个或多个氨基酸或核苷酸的增加。 "替换" 是指由不同的氨基酸 或核苷酸替换一个或多个氨基酸或核苷酸。
"生物活性" 是指具有天然分子的结构、 调控或生物化学功能的蛋白质。 类 似地, 术语 "免疫学活性" 是指天然的、 重组的或合成蛋白质及其片段在合适的 动物或细胞中诱导特定免疫反应以及与特异性抗体结合的能力。
"激动剂" 是指当与人大麻醇受体蛋白 11结合时, 一种可引起该蛋白质改 变从而调节该蛋白质活性的分子。 激动剂可以包括蛋白质、 核酸、 碳水化合物 或任何其它可结合人大麻醇受体蛋白 11的分子。
"拮抗剂" 或 "抑制物" 是指当与人大麻醇受体蛋白 11结合时, 一种可封 闭或调节人大麻醇受体蛋白 11的生物学活性或免疫学活性的分子。 拮抗剂和抑 制物可以包括蛋白质、 核酸、 碳水化合物或任何其它可结合人大麻醇受体蛋白
11的分子。
"调节" 是指人大麻醇受体蛋白 11的功能发生改变, 包括蛋白质活性的升 高或降低、 结合特性的改变及人大麻醇受体蛋白 11的任何其它生物学性质、 功 能或免疫性质的改变。
"基本上纯' '是指基本上不含天然与其相关的其它蛋白、 脂类、 糖类或其它物 质。 本领域的技术人员能用标准的蛋白质纯化技术纯化人大麻醇受体蛋白 11。 基 本上纯的人大麻醇受体蛋白 11 在非还原性聚丙烯酰胺凝胶上能产生单一的主带。 人大麻醇受体蛋白 11多肽的纯度可用氨基酸序列分析。
"互补的" 或 "互补" 是指在允许的盐浓度和温度条件下通过碱基配对的 多核苷酸天然结合。 例如序列 "C-T-G- A" 可与互补的序列 "G- A- C- T" 结合。 两个单链分子之间的互补可以是部分的或全部的。 核酸链之间的互补程度对于 核酸链之间杂交的效率及强度有明显影响。
"同源性" 是指互补的程度, 可以是部分同源或完全同源。 "部分同源" 是指一种部分互补的序列, 其至少可部分抑制完全互补的序列与靶核酸的杂 交。 这种杂交的抑制可通过在严格性程度降低的条件下进行杂交 (Southern印 迹或 Northern印迹等) 来检测。 基本上同源的序列或杂交探针可竟争和抑制完 全同源的序列与靶序列在严格性程度降低的条件下的结合。 这并不意味严格性 程度降低的条件允许非特异性结合, 因为严格性程度降低的条件要求两条序列 相互的结合为特异性或选择性相互作用。
"相同性百分率" 是指在两种或多种氨基酸或核酸序列比较中序列相同或 相似的百分率。 可用电子方法测定相同性百分率, 如通过 MEGALIGN程序 ( Lasergene sof tware package, DNASTAR, Inc. , Mad i son Wi s. ) 。 MEGALIGN 程序可根据不同的方法如 C lus ter法比较两种或多种序列(Hi gg ins , D. G. 和 P. M. Sharp (1988) Gene 73: 237-244) 0 C lus ter法通过检查所有配对之间的 距离将各组序列排列成簇。 然后将各簇以成对或成组分配。 两个氨基酸序列如 序列 A和序列 B之间的相同性百分率通过下式计算:
序列 ^与序列 S之间匹配的残基个数 也可以通过 C lus ter法或用本领域周知的方法如 Jotun He in 测定核酸序列 之间的相同性百分率(He in J., (1990) Methods in enzymology 183: 625-645) 0
"相似性" 是指氨基酸序列之间排列对比时相应位置氨基酸残基的相同 或保守性取代的程度。 用于保守性取代的氨基酸, 例如带负电荷的氨基酸可包 括天冬氨酸和谷氨酸; 带正电荷的氨基酸可包括赖氨酸和精氨酸; 具有不带电 荷的头部基团有相似亲水性的氨基酸可包括亮氨酸、 异亮氨酸和缬氨酸; 甘氨 酸和丙氨酸; 天冬酰胺和谷氨酰胺; 丝氨酸和苏氨酸; 苯丙氨酸和酪氨酸。
"反义" 是指与特定的 DNA或 RNA序列互补的核苷酸序列。 "反义链" 是指 与 "有义链" 互补的核酸链。
"衍生物" 是指 HFP或编码其核酸的化学修饰物。 这种化学修饰物可以是 用垸基、 酰基或氨基替换氢原子。 核酸衍生物可编码保留天然分子的主要生物 学特性的多肽。
"抗体" 是指完整的抗体分子及其片段, 如 Fa、 ?(^') 2及? , 其能特异 性结合人大麻醇受体蛋白 11的抗原决定簇。
"人源化抗体" 是指非抗原结合区域的氨基酸序列被替换变得与人抗体 更为相似, 但仍保留原始结合活性的抗体。
"分离的" 一词指将物质从它原来的环境 (例如若是自然产生的就指其天 然环境) 之中移出。 比如说, 一个自然产生的多核苷酸或多肽存在于活动物中 就是没有被分离出来, 但同样的多核苷酸或多肽同一些或全部在自然系统中与 之共存的物质分开就是分离的。 这样的多核苷酸可能是某一载体的一部分, 也 可能这样的多核苷酸或多肽是某一组合物的一部分。 既然载体或组合物不是它 天然环境的成分, 它们仍然是分离的。
如本发明所用, "分离的" 是指物质从其原始环境中分离出来 (如果是天 然的物质, 原始环境即是天然环境) 。 如活体细胞内的天然状态下的多聚核苷 酸和多肽是没有分离纯化的, 但同样的多聚核苷酸或多肽如从天然状态中同存 在的其他物质中分开, 则为分离纯化的。
如本文所用, "分离的人大麻醇受体蛋白 11 " 是指人大麻醇受体蛋白 11 基本上不含天然与其相关的其它蛋白、 脂类、 糖类或其它物质。 本领域的技术 人员能用标准的蛋白质纯化技术纯化人大麻醇受体蛋白 11。 基本上纯的多肽在 非还原聚丙烯酰胺凝胶上能产生单一的主带。 人大麻醇受体蛋白 11 多肽的纯 度能用氨基酸序列分析。
本发明提供了一种新的多肽——人大麻醇受体蛋白 11, 其基本上是由 SEQ ID NO: 2所示的氨基酸序列组成的。 本发明的多肽可以是重组多肽、 天然多肽、 合成 多肽, 优选重组多肽。 本发明的多肽可以是天然纯化的产物, 或是化学合成的产 物, 或使用重组技术从原核或真核宿主 (例如细菌、 酵母、 高等植物、 昆虫和哺乳 动物细胞)中产生。 根据重组生产方案所用的宿主, 本发明的多肽可以是糖基化的, 或可以是非糖基化的。 本发明的多肽还可包括或不包括起始的甲硫氨酸残基。
本发明还包括人大麻醇受体蛋白 11 的片段、 衍生物和类似物。 如本发明 所用, 术语 "片段" 、 "衍生物" 和 "类似物" 是指基本上保持本发明的人大 麻醇受体蛋白 11 相同的生物学功能或活性的多肽。 本发明多肽的片段、 衍生 物或类似物可以是: ( I ) 这样一种, 其中一个或多个氨基酸残基被保守或非 保守氨基酸残基 (优选的是保守氨基酸残基) 取代, 并且取代的氨基酸可以是 也可以不是由遗传密码子编码的; 或者 ( Π ) 这样一种, 其中一个或多个氨基 酸残基上的某个基团被其它基团取代包含取代基; 或者 ( I I I ) 这样一种, 其 中成熟多肽与另一种化合物 (比如延长多肽半衰期的化合物, 例如聚乙二醇) 融合; 或者 ( IV ) 这样一种, 其中附加的氨基酸序列融合进成熟多肽而形成的 多肽序列 (如前导序列或分泌序列或用来纯化此多肽的序列或蛋白原序列) 。 通过本文的阐述, 这样的片段、 及其衍生物和类似物被认为在本领域技术人员 的知识范围之内。
本发明提供了分离的核酸 (多核苷酸) , 基本由编码具有 SEQ ID NO: 2 氨 基酸序列的多肽的多核苷酸组成。 本发明的多核苷酸序列包括 SEQ ID N0: 1 的 核苷酸序列。 本发明的多核苷酸是从人胎脑组织的 cDNA 文库中发现的。 它包 含的多核苷酸序列全长为 1714个碱基, 其开放读框 323-625编码了 100个氨 基酸。 根据基因芯片表达谱比较发现, 此多肽与人中枢大麻醇受体有相似的表 达谱, 可推断出该人大麻醇受体蛋白 11具有人中枢大麻醇受体相似的功能。
本发明的多核苷酸可以是 DNA形式或是 RNA形式。 DNA形式包括 cDNA、 基 因组 DNA 或人工合成的 DNA。 DNA 可以是单链的或是双链的。 DNA 可以是编码 链或非编码链。 编码成熟多肽的编码区序列可以与 SEQ ID NO: 1所示的编码区 序列相同或者是简并的变异体。 如本发明所用, "简并的变异体" 在本发明中 是指编码具有 SEQ ID NO: 2的蛋白质或多肽, 但与 SEQ ID NO: 1所示的编码区 序列有差别的核酸序列。
编码 SEQ ID NO: 2的成熟多肽的多核苷酸包括: 只有成熟多肽的编码序列; 成熟多肽的编码序列和各种附加编码序列; 成熟多肽的编码序列 (和任选的附 加编码序列) 以及非编码序列。 术语 "编码多肽的多核苷酸" 是指包括编码此多肽的多核苷酸和包括附加 编码和 /或非编码序列的多核苷酸。
本发明还涉及上述描述多核苷酸的变异体, 其编码与本发明有相同的氨基 酸序列的多肽或多肽的片断、 类似物和衍生物。 此多核苷酸的变异体可以是天 然发生的等位变异体或非天然发生的变异体。 这些核苷酸变异体包括取代变异 体、 缺失变异体和插入变异体。 如本领域所知的, 等位变异体是一个多核苷酸 的替换形式, 它可能是一个或多个核苷酸的取代、 缺失或插入, 但不会从实质 上改变其编码的多肽的功能。
本发明还涉及与以上所描述的序列杂交的多核苷酸 (两个序列之间具有至 少 50%, 优选具有 70%的相同性) 。 本发明特别涉及在严格条件下与本发明所 述多核苷酸可杂交的多核苷酸。 在本发明中, "严格条件" 是指: (1)在较低 离子强度和较高温度下的杂交和洗脱, 如 0.2xSSC, 0.1%SDS, 60°C;或(2)杂交 时加用变性剂, 如 50%(v/v)甲酰胺, 0.1%小牛血清 /0. l%Ficoll, 42°C等; 或 (3)仅在两条序列之间的相同性至少在 95%以上,更好是 97%以上时才发生杂 交。 并且, 可杂交的多核苷酸编码的多肽与 SEQ ID NO: 2 所示的成熟多肽有 相同的生物学功能和活性。
本发明还涉及与以上所描述的序列杂交的核酸片段。 如本发明所用, "核 酸片段"的长度至少含 10个核苷酸, 较好是至少 20- 30个核苷酸, 更好是至少 50 - 60个核苷酸, 最好是至少 100 个核苷酸以上。 核酸片段也可用于核酸的扩 增技术(如 PCR)以确定和 /或分离编码人大麻醇受体蛋白 11的多核苷酸。
本发明中的多肽和多核苷酸优选以分离的形式提供, 更佳地被纯化至均质。 本发明的编码人大麻醇受体蛋白 11 的特异的多核苷酸序列能用多种方法 获得。 例如用本领域熟知的杂交技术分离多核苷酸。 这些技术包括但不局限于: 1)用探针与基因组或 cDNA 文库杂交以检出同源的多核苷酸序列, 和 2)表达文 库的抗体筛选以检出具有共同结构特征的克隆的多核苷酸片段。
本发明的 DNA片段序列也能用下列方法获得: 1)从基因组 DNA分离双链 DNA 序列; 2)化学合成 DM序列以获得所述多肽的双链 DNA。
上述提到的方法中, 分离基因组 DNA 最不常用。 DNA 序列的直接化学合成 是经常选用的方法。 更经常选用的方法是 cDNA序列的分离。 分离感兴趣的 cDNA 的标准方法是从高表达该基因的供体细胞分离 mRNA 并进行逆转录, 形成质粒 或噬菌体 cDNA文库。 提取 mRNA 的方法已有多种成熟的技术, 试剂盒也可从商 业途径获得(Qiagene)。 而构建 cDNA 文库也是通常的方法(Sambrook, et al., Molecular Cloning, A Laboratory Manual, Cold Spring Harbor Laboratory. New York, 1989)。还可得到商业供应的 cDNA文库,如 Clontech公司的不同 cDNA 文库。 当结合使用聚合酶反应技术时, 即使极少的表达产物也能克隆。
可用常规方法从这些 cDNA 文库中筛选本发明的基因。 这些方法包括(但不 限于): (l)DNA- DNA 或 DNA-RNA 杂交; (2)标志基因功能的出现或丧失; (3)测 定人大麻醇受体蛋白 11 的转录本的水平; (4)通过免疫学技术或测定生物学活 性, 来检测基因表达的蛋白产物。 上述方法可单用, 也可多种方法联合应用。
在第(1)种方法中, 杂交所用的探针是与本发明的多核苷酸的任何一部分 同源, 其长度至少 10个核苷酸, 较好是至少 30个核苷酸, 更好是至少 50个 核苷酸, 最好是至少 100 个核苷酸。 此外, 探针的长度通常在 2000 个核苷酸 之内, 较佳的为 1000 个核苷酸之内。 此处所用的探针通常是在本发明的基因 序列信息的基础上化学合成的 D 序列。 本发明的基因本身或者片段当然可以 用作探针。 DNA探针的标记可用放射性同位素, 荧光素或酶(如碱性璘酸酶)等。
在第(4)种方法中, 检测人大麻醇受体蛋白 11 基因表达的蛋白产物可用免 疫学技术如 Western印迹法、 放射免疫沉淀法、 酶联免疫吸附法(ELISA)等。
应 用 PCR 技术 扩增 DNA/RNA 的 方 法 (Saiki, et al. Science 1985;230: 1350-1354)被优选用于获得本发明的基因。 特别是很难从文库中得 到全长的 cDNA时, 可优选使用 RACE法(RACE- cDNA末端快速扩增法),用于 PCR 的引物可根据本文所公开的本发明的多核苷酸序列信息适当地选择, 并可用常 规方法合成。 可用常规方法如通过凝胶电泳分离和纯化扩增的 DNA/RNA片段。
如上所述得到的本发明的基因, 或者各种 DNA 片段等的多核苷酸序列可用 常规方法如双脱氧链终止法(Sanger et al. PNAS, 1977, 74: 5463- 5467)测 定。 这类多核苷酸序列测定也可用商业测序试剂盒等。 为了获得全长的 cDNA 序列, 测序需反复进行。 有时需要测定多个克隆的 cDNA 序列, 才能拼接成全 长的 cDNA序列。
本发明也涉及包含本发明的多核苷酸的载体, 以及用本发明的载体或直接 用人大麻醇受体蛋白 11 编码序列经基因工程产生的宿主细胞, 以及经重组技 术产生本发明所述多肽的方法。
本发明中, 编码人大麻醇受体蛋白 11 的多核苷酸序列可插入到载体中, 以构成含有本发明所述多核苷酸的重组载体。 术语 "载体" 指本领域熟知的细 菌质粒、 噬菌体、 酵母质粒、 植物细胞病毒、 哺乳动物细胞病毒如腺病毒、 逆 转录病毒或其它载体。 在本发明中适用的载体包括但不限于: 在细菌中表达的 基于 T7 启动子的表达载体(Rosenberg, et al. Gene, 1987, 56: 125); 在哺 乳动物细胞中表达的 pMSXND 表达载体(Lee and Nathans, J Bio Chem. 263: 3521, 1988)和在昆虫细胞中表达的来源于杆状病毒的载体。 总之, 只要能 在宿主体内复制和稳定, 任何质粒和载体都可以用于构建重组表达载体。 表达 载体的一个重要特征是通常含有复制起始点、 启动子、 标记基因和翻译调控元 件。
本领域的技术人员熟知的方法能用于构建含编码人大麻醇受体蛋白 11 的 DNA 序列和合适的转录 /翻译调控元件的表达载体。 这些方法包括体外重组 DNA 技术、 DNA合成技术、 体内重组技术等(Sambroook, et al. Molecular Cloning, a Laboratory Manual, Cold Spring Harbor Laboratory. New York, 1989)。 所述的 DNA序列可有效连接到表达载体中的适当启动子上, 以指导 mRNA合成。 这些启动子的代表性例子有: 大肠杆菌的 lac 或 trp 启动子; λ噬菌体的 PL 启动子; 真核启动子包括 CMV 立即早期启动子、 HSV 胸苷激酶启动子、 早期和 晚期 SV40启动子、 反转录病毒的 LTRs 和其它一些已知的可控制基因在原核细 胞或真核细胞或其病毒中表达的启动子。 表达载体还包括翻译起始用的核糖体 结合位点和转录终止子等。 在载体中插入增强子序列将会使其在高等真核细胞 中的转录得到增强。 增强子是 DNA表达的顺式作用因子, 通常大约有 10到 300 个碱基对, 作用于启动子以增强基因的转录。 可举的例子包括在复制起始点晚 期一侧的 100 到 270个碱基对的 SV40增强子、 在复制起始点晚期一侧的多瘤 增强子以及腺病毒增强子等。
此外, 表达载体优选地包含一个或多个选择性标记基因, 以提供用于选择 转化的宿主细胞的表型性状, 如真核细胞培养用的二氢叶酸还原酶、 新霉素抗 性以及绿色荧光蛋白(GFP), 或用于大肠杆菌的四环素或氨苄青霉素抗性等。
本领域一般技术人员都清楚如何选择适当的载体 /转录调控元件 (如启动 子、 增强子等) 和选择性标记基因。
本发明中, 编码人大麻醇受体蛋白 11 的多核苷酸或含有该多核苷酸的重 组载体可转化或转导入宿主细胞, 以构成含有该多核苷酸或重组载体的基因工 程化宿主细胞。 术语 "宿主细胞" 指原核细胞, 如细菌细胞; 或是低等真核细 胞, 如酵母细胞; 或是高等真核细胞, 如哺乳动物细胞。 代表性例子有: 大肠 杆菌, 链霉菌属; 细菌细胞如鼠伤寒沙门氏菌; 真菌细胞如酵母; 植物细胞; 昆虫细胞如果蝇 S2或 Sf9; 动物细胞如 CH0、 COS或 Bowes黑素瘤细胞等。
用本发明所述的 DNA序列或含有所述 DM序列的重组载体转化宿主细胞可 用本领域技术人员熟知的常规技术进行。 当宿主为原核生物如大肠杆菌时, 能 吸收 DNA 的感受态细胞可在指数生长期后收获, 用 ( 12法处理, 所用的步骤 在本领域众所周知。 可供选择的是用 MgC l 2。 如果需要, 转化也可用电穿孔的 方法进行。 当宿主是真核生物, 可选用如下的 DNA转染方法: 磷酸钙共沉淀法, 或者常规机械方法如显微注射、 电穿孔、 脂质体包装等。
通过常规的重组 DNA技术, 利用本发明的多核苷酸序列可用来表达或生产 重组的人大麻醇受体蛋白 11 (Sc i ence , 1984 ; 224: 1431)。 一般来说有以下步 骤:
(1)用本发明的编码人 人大麻醇受体蛋白 11 的多核苷酸(或变异体), 或 用含有该多核苷酸的重组表达载体转化或转导合适的宿主细胞;
(2)在合适的培养基中培养宿主细胞;
(3)从培养基或细胞中分离、 纯化蛋白质。
在步骤 ( 2 ) 中, 根据所用的宿主细胞, 培养中所用的培养基可选自各种 常规培养基。 在适于宿主细胞生长的条件下进行培养。 当宿主细胞生长到适当 的细胞密度后, 用合适的方法(如温度转换或化学诱导)诱导选择的启动子, 将 细胞再培养一段时间。
在步骤 ( 3 ) 中, 重组多肽可包被于细胞内、 或在细胞膜上表达、 或分泌 到细胞外。 如果需要, 可利用其物理的、 化学的和其它特性通过各种分离方法 分离和纯化重组的蛋白。 这些方法是本领域技术人员所熟知的。 这些方法包括 但并不限于: 常规的复性处理、 蛋白沉淀剂处理(盐析方法)、 离心、 渗透破菌、 超声波处理、 超离心、 分子筛层析(凝胶过滤)、 吸附层析、 离子交换层析、 高 效液相层析(HPLC)和其它各种液相层析技术及这些方法的结合。
本发明的多肽以及该多肽的拮抗剂、 激动剂和抑制剂可直接用于疾病治 疗, 例如可治疗恶性肿瘤、 肾上腺缺乏症、 皮肤病、 各类炎症、 H IV 感染和免 疫性疾病等。
大麻醇受体蛋白有中枢大麻醇受体及周遍大麻醇受体两种, 它们在体内广 泛存在。 其中中枢大麻醇受体蛋白在人的中枢神经系统、 脑、 心脏、 前列腺、 睾丸等组织中均有表达; 而周遍大麻醇受体蛋白在中枢神经系统无表达, 在免 疫系统中则有较高的表达量。 两者分别在上述各种组织的发育与作用过程中发 挥重要的中间调控作用。
研究发现, 中枢大麻醇受体蛋白主要介导大麻在体内的药理活性, 其表达 异常将直接影响大麻在体内的功能, 从而引发各种相关的神经系统紊乱性疾 病, 如图雷特氏综合症、 强迫行为紊乱症、 帕金森综合症、 早老性痴呆等; 周 遍大麻醇受体蛋白则在体内的免疫系统中高表达, 该蛋白通过与百曰咳毒素敏 感的 GTP结合蛋白协同作用, 以调控体内腺苷酸环化酶的作用活性, 进而调控 各种相关的免疫系统反应。 该蛋白的突变或表达异常将直接导致体内一些免疫 系统反应的正常进行, 进而引发各种相关的免疫系统紊乱型疾病及各组织、 细 胞的炎症反应。
本发明的多肽的表达谱与人大麻醇受体蛋白的表达谱相一致, 两者具有相 似的生物学功能。 它在体内主要介导大麻在体内的药理活性, 对于神经递质的 调节很重要, 此外, 对于机体免疫系统的调控、 对于生长发育调节也具重要性。 其表达异常对于上述组织系统的病理过程的发生密切相关, 并产生相关的疾 病。
由此可见, 本发明的人大麻醇受体蛋白 1 1 的表达异常将产生各种疾病尤 其是神经精神紊乱性疾病、 免疫性疾病、 胚胎发育紊乱症、 生长发育障碍性疾 病、 炎症、 各种肿瘤, 这些疾病包括但不限于:
神经精神紊乱性疾病: 老年痴呆症, 帕金森氏病, 舞蹈症, 抑郁症, 健忘 症, 亨延顿病, 癫痫症, 偏头痛, 多发性硬化 , 精神分裂症, 抑郁症, 神经 衰弱, 神经肌肉疾病, 神经皮肤综合症, 三叉神经痛, 面神经麻痹
免疫性疾病: 系统性红斑狼疮, 类风湿性关节炎, 支气管哮喘, 荨麻疹, 特异性皮炎, 感染后心肌炎, 硬皮病, 重症肌无力, 格林-巴利综合症, 普通 易变免疫缺陷病, 原发性 B淋巴细胞免疫缺陷病, 获得性免疫缺陷综合症
胚胎发育紊乱症: 神经管闭合不全, 大脑发育畸形, 神经元迁徙障碍, 先 天性流产, 腭裂, 肢体缺如, 肢体分化障碍, 房间隔缺损, 神经管缺陷, 先天 性脑积水, 先天性青光眼或白内障, 先天性耳聋
生长发育障碍性疾病: 精神发育迟缓, 脑发育障碍, 皮肤、 脂肪和肌肉发 育不良性疾病, 骨与关节发育不良性疾病, 各种代谢缺陷病, 呆小症, 侏儒症, 库兴综合症, 性发育迟缓症
各种组织的肿瘤: 神经细胞瘤, 星形细胞瘤, 室管膜瘤, 胶质细胞瘤, 神 经纤维瘤, 胃癌, 肝癌, 肺癌, 食管癌, 乳腺癌, 白血病, 淋巴瘤, 甲状腺肿 瘤, 子宫肌瘤
炎症: 慢性活动性肝炎, 结节病, 多肌炎, 慢性鼻炎, 慢性胃炎, 脑脊髓 多发性硬化, 肾小球性肾炎, 心肌炎, 心肌病, 动脉粥样硬化, 胃溃疡, 子宫 颈炎, 各种感染性炎症 本发明的人大麻醇受体蛋白 11的表达异常还将产生某些遗传性疾病等。 本发明的多肽以及该多肽的拮抗剂、 激动剂和抑制剂可直接用于疾病治 疗, 例如可治疗各种疾病尤其是神经精神紊乱性疾病、 免疫性疾病、 胚胎发育 紊乱症、 生长发育障碍性疾病、 炎症、 各种肿瘤, 某些遗传性疾病等。 此外, 本发明的多肽以及该多肽的拮抗剂、 激动剂和抑制剂可直接用于精神活性药物 所致的精神障碍性疾病的治疗,
本发明也提供了筛选化合物以鉴定提高(激动剂)或阻遏(拮抗剂)人大麻醇 受体蛋白 11 的药剂的方法。 激动剂提高人大麻醇受体蛋白 11 刺激细胞增殖等 生物功能, 而拮抗剂阻止和治疗与细胞过度增殖有关的紊乱如各种癌症。 例如 能在药物的存在下, 将哺乳动物细胞或表达人大麻醇受体蛋白 11 的膜制剂与 标记的人大麻醇受体蛋白 11 一起培养。 然后测定药物提高或阻遏此相互作用 的能力。
人大麻醇受体蛋白 n 的拮抗剂包括筛选出的抗体、 化合物、 受体缺失物 和类似物等。 人大麻醇受体蛋白 11 的拮抗剂可以与人大麻醇受体蛋白 11 结合 并消除其功能, 或是抑制该多肽的产生, 或是与该多肽的活性位点结合使该多 肽不能发挥生物学功能。
在筛选作为拮抗剂的化合物时, 可以将人大麻醇受体蛋白 11 加入生物分 析测定中, 通过测定化合物对人大麻醇受体蛋白 11 和其受体之间相互作用的 影响来确定化合物是否是拮抗剂。 用上述筛选化合物的同样方法, 可以筛选出 起拮抗剂作用的受体缺失物和类似物。 能与人大麻醇受体蛋白 11 结合的多肽 分子可通过筛选由各种可能组合的氨基酸结合于固相物组成的随机多肽库而获 得。 筛选时, 一般应对人大麻醇受体蛋白 11分子进行标记。
本发明提供了用多肽, 及其片段、 衍生物、 类似物或它们的细胞作为抗原 以生产抗体的方法。 这些抗体可以是多克隆抗体或单克隆抗体。 本发明还提供 了针对人大麻醇受体蛋白 11 抗原决定簇的抗体。 这些抗体包括(但不限于): 多克隆抗体、 单克隆抗体、 嵌合抗体、 单链抗体、 Fab 片段和 Fab 表达文库产 生的片段。
多克隆抗体的生产可用人大麻醇受体蛋白 11 直接注射免疫动物 (如家兔, 小鼠, 大鼠等) 的方法得到, 多种佐剂可用于增强免疫反应, 包括但不限于弗 氏佐剂等。 制备人大麻醇受体蛋白 11 的单克隆抗体的技术包括但不限于杂交 瘤技术(Koh l er and Mi l s te in. Na ture, 1975, 256: 495-497) , 三瘤技术, 人 Β- 细胞杂交瘤技术, EBV-杂交瘤技术等。 将人恒定区和非人源的可变区结合的嵌 合抗体可用已有的技术生产(Morr i son et a l , PNAS, 1985, 81 : 6851) 0 而已有 的生产单链抗体的技术(U. S. Pat No. 4946778)也可用于生产抗人大麻醇受体 蛋白 11的单链抗体。
抗人大麻醇受体蛋白 11 的抗体可用于免疫组织化学技术中, 检测活检标 本中的人大麻醇受体蛋白 11。
与人大麻醇受体蛋白 11 结合的单克隆抗体也可用放射性同位素标记, 注 入体内可跟踪其位置和分布。 这种放射性标记的抗体可作为一种非创伤性诊断 方法用于肿瘤细胞的定位和判断是否有转移。
抗体还可用于设计针对体内某一特殊部位的免疫毒素。 如人大麻醇受体蛋 白 11 高亲和性的单克隆抗体可与细菌或植物毒素(如白喉毒素, 蓖麻蛋白, 红 豆碱等)共价结合。 一种通常的方法是用巯基交联剂如 SPDP, 攻击抗体的氨基, 通过二硫键的交换, 将毒素结合于抗体上, 这种杂交抗体可用于杀灭人大麻醇 受体蛋白 11阳性的细胞。
本发明中的抗体可用于治疗或预防与人大麻醇受体蛋白 11 相关的疾病。 给予适当剂量的抗体可以刺激或阻断人大麻醇受体蛋白 11的产生或活性。
本发明还涉及定量和定位检测人大麻醇受体蛋白 11 水平的诊断试验方法。 这些试验是本领域所熟知的, 且包括 FISH 测定和放射免疫测定。 试验中所检 测的人大麻醇受体蛋白 11水平, 可以用作解释人大麻醇受体蛋白 11 在各种疾 病中的重要性和用于诊断人大麻醇受体蛋白 11起作用的疾病。
本发明的多肽还可用作肽谱分析, 例如多肽可用物理的、 化学或酶进行特 异性切割, 并进行一维或二维或三维的凝胶电泳分析,更好的是进行质谱分析。
编码人大麻醇受体蛋白 11 的多核苷酸也可用于多种治疗目的。 基因治疗 技术可用于治疗由于人大麻醇受体蛋白 11 的无表达或异常 /无活性表达所致的 细胞增殖、 发育或代谢异常。 重组的基因治疗载体(如病毒载体)可设计用于表 达变异的人大麻醇受体蛋白 π, 以抑制内源性的人大麻醇受体蛋白 11 活性。 例如一种变异的人大麻醇受体蛋白 11 可以是缩短的、 缺失了信号传导功能域 的人大麻醇受体蛋白 11 , 虽可与下游的底物结合, 但缺乏信号传导活性。 因此 重组的基因治疗载体可用于治疗人大麻醇受体蛋白 11 表达或活性异常所致的 疾病。 来源于病毒的表达载体如逆转录病毒、 腺病毒、 腺病毒相关病毒、 单纯 疱疹病毒、 细小病毒等可用于将编码人大麻醇受体蛋白 11 的多核苷酸转移至 细胞内。 构建携带编码人大麻醇受体蛋白 11 的多核苷酸的重组病毒载体的方 法可见于已有文献(Sambrook,e t a l. )。 另外,重组编码人大麻醇受体蛋白 11 的 多核苷酸可包装到脂质体中转移至细胞内。
多核苷酸导入组织或细胞内的方法包括: 将多核苷酸直接注入到体内组织 中; 或在体外通过载体(如病毒、 噬菌体或质粒等)先将多核苷酸导入细胞中, 再将细胞移植到体内等。
抑制人大麻醇受体蛋白 11 mRNA 的寡核苷酸(包括反义 RM和 DNA)以及核 酶也在本发明的范围之内。 核酶是一种能特异性分解特定 RNA的酶样 RNA分子, 其作用机制是核酶分子与互补的靶 RNA 特异性杂交后进行核酸内切作用。 反义 的 RNA和 DNA及核酶可用已有的任何 RNA或 DNA合成技术获得, 如固相磷酸酰 胺化学合成法合成寡核苷酸的技术已广泛应用。反义 RNA分子可通过编码该 RNA 的 DNA序列在体外或体内转录获得。 这种 DNA序列已整合到载体的 RM聚合酶 启动子的下游。 为了增加核酸分子的稳定性, 可用多种方法对其进行修饰, 如 增加两恻的序列长度, 核糖核苷之间的连接应用磷酸琉酯键或肽键而非磷酸二 酯键。
编码人大麻醇受体蛋白 1 1 的多核苷酸可用于与人大麻醇受体蛋白 1 1 的相 关疾病的诊断。 编码人大麻醇受体蛋白 1 1 的多核苷酸可用于检测人大麻醇受 体蛋白 1 1 的表达与否或在疾病状态下人大麻醇受体蛋白 1 1 的异常表达。 如编 码人大麻醇受体蛋白 1 1 的 DNA 序列可用于对活检标本进行杂交以判断人大麻 醇受体蛋白 11的表达状况。 杂交技术包括 Southern印迹法、 Nor thern印迹法、 原位杂交等。 这些技术方法都是公开的成熟技术, 相关的试剂盒都可从商业途 径得到。 本发明的多核苷酸的一部分或全部可作为探针固定在微阵列 (Mi croa rray)或 DNA 芯片(又称为 "基因芯片" )上, 用于分析组织中基因的差 异表达分析和基因诊断。 用人大麻醇受体蛋白 11 特异的引物进行 RNA -聚合酶 链反应(RT-PCR)体外扩增也可检测人大麻醇受体蛋白 1 1的转录产物。
检测人大麻醇受体蛋白 1 1 基因的突变也可用于诊断人大麻醇受体蛋白 11 相关的疾病。 人大麻醇受体蛋白 11 突变的形式包括与正常野生型人大麻醇受 体蛋白 1 1 DNA 序列相比的点突变、 易位、 缺失、 重组和其它任何异常等。 可 用已有的技术如 Southern 印迹法、 DNA序列分析、 PCR和原位杂交检测突变。 另外, 突变有可能影响蛋白的表达, 因此用 Nor thern 印迹法、 Wes tern 印迹法 可间接判断基因有无突变。
本发明的序列对染色体鉴定也是有价值的。 该序列会特异性地针对某条人 染色体具体位置并且可以与其杂交。 目前, 需要鉴定染色体上的各基因的具体 位点。 现在, 只有很少的基于实际序列数据(重复多态性)的染色体标记物可用 于标记染色体位置。 根据本发明, 为了将这些序列与疾病相关基因相关联, 其 重要的第一步就是将这些 DNA序列定位于染色体上。
简而言之, 根据 cDNA制备 PCR引物(优选 15-35bp) , 可以将序列定位于染色 有那些 相应 引物的人基因的杂合细胞会产生扩增的片段。 '、 、 体细胞杂合细胞的 PCR定位法, 是将 DNA定位到具体染色体的快捷方法。 使 用本发明的寡核苷酸引物, 通过类似方法, 可利用一组来自特定染色体的片段 或大量基因组克隆而实现亚定位。 可用于染色体定位的其它类似策略包括原位 杂交、 用标记的流式分选的染色体预筛选和杂交预选, 从而构建染色体特异的 cDNA库。
将 cDNA克隆与中期染色体进行荧光原位杂交(FISH) , 可以在一个步骤中精 确地进行染色体定位。此技术的综述参见 Verma等, Human Chromosomes: a Manua l of Bas i c Techniques, Pergamon Pres s, New York (1988)。
一旦序列被定位到准确的染色体位置, 此序列在染色体上的物理位置就可 以与基因图数据相关联。 这些数据可见于 V. Mckus i ck, Mende l ian Inher i tance in Man (可通过与 Johns Hopk ins Univers i ty Welch Medica l Library联机获 得)。 然后可通过连锁分析, 确定基因与业已定位到染色体区域上的疾病之间 的关系。
接着, 需要测定患病和未患病个体间的 cDNA或基因组序列差异。 如果在一 些或所有的患病个体中观察到某突变, 而该突变在任何正常个体中未观察到, 则该突变可能是疾病的病因。 比较患病和未患病个体, 通常涉及首先寻找染色 体中结构的变化, 如从染色体水平可见的或用基于 cDNA序列的 PCR可检测的缺 失或易位。 根据目前的物理作图和基因定位技术的分辨能力, 被精确定位至与 疾病有关的染色体区域的 cDNA, 可以是 50至 500个潜在致病基因间之一种(假定 1兆碱基作图分辨能力和每 20kb对应于一个基因)。
可以将本发明的多肽、 多核苷酸及其模拟物、 激动剂、 拮抗剂和抑制剂与 合适的药物载体组合后使用。 这些载体可以是水、 葡萄糖、 乙醇、 盐类、 缓冲 液、 甘油以及它们的组合。 组合物包含安全有效量的多肽或拮抗剂以及不影响 药物效果的载体和赋形剂。 这些组合物可以作为药物用于疾病治疗。
本发明还提供含有一种或多种容器的药盒或试剂盒, 容器中装有一种或多 种本发明的药用组合物成分。 与这些容器一起, 可以有由制造、 使用或销售药 品或生物制品的政府管理机构所给出的指示性提示, 该提示反映出生产、 使用 或销售的政府管理机构许可其在人体上施用。 此外, 本发明的多肽可以与其它 的治疗化合物结合使用。
药物组合物可以以方便的方式给药, 如通过局部、 静脉内、 腹膜内、 肌内、 皮下、 鼻内或皮内的给药途径。 人大麻醇受体蛋白 11 以有效地治疗和 /或预防 具体的适应症的量来给药。 施用于患者的人大麻醇受体蛋白 11 的量和剂量范 围将取决于许多因素, 如给药方式、 待治疗者的健康条件和诊断医生的判断。 实施例
下面结合具体实施例, 进一步阐述本发明。 应理解, 这些实施例仅用于说 明本发明而不用于限制本发明的范围。 下列实施例中未注明具体条件的实验方 法, 通常按照常规条件如 Sambrook等人, 分子克隆: 实验室手册(New York: Cold Spring Harbor Laboratory Press, 1989)中所述的条件, 或按照制造厂 商所建议的条件。
实施例 1 人大麻醇受体蛋白 11的克隆
用异硫氰酸胍 /酚 /氯仿一步法提取人胎脑总 RNA。 用 Quik raRNA Isolation Kit (Qiegene 公司产品) 从总 RNA中分离 poly (A) mRNA。 2ug poly (A) mRNA经逆转录 形成 cDM。用 Smart cDNA克隆试剂盒(购自 CI on tech )将cDNA片段定向插入到 pBSK (+) 载体(Clontech公司产品)的多克隆位点上, 转化 DH5 α , 细菌形成 cDNA文库。 用 Dye terminate cycle react ion sequencing kit (Perkin-Elmer公司产品) 和 ABI 377 自动测序仪(Perkin-Elmer公司)测定所有克隆的 5'和 3'末端的序列。将测定的 cDNA 序列与已有的公共 DNA序列数据库 (Genebank)进行比较, 结果发现其中一个克隆 0266g01的 cDNA序列为新的 DNA。 通过合成一系列引物对该克隆所含的插入 cDNA片 段进行双向测定。结果表明, 0266g01克隆所含的全长 cDNA为 1714bp (如 Seq IDN0: l 所示) , 从第 323bp至 625bp有一个 303bp的开放阅读框架 ( 0RF ) , 编码一个新的 蛋白质 (如 Seq ID NO: 2所示) 。 我们将此克隆命名为 pBS-0266g01, 编码的蛋白 质命名为人大麻醇受体蛋白 11。 实施例 2 用 RT-PCR方法克隆编码人大麻醇受体蛋白 11的基因
用胎脑细胞总 RNA为模板,以 oligo-dT为引物进行逆转录反应合成 cDNA,用 Qiagene的试剂盒纯化后,用下列引物进行 PCR扩增:
Priraerl: 5'— CGTAATTCATAAACCAAAATTCCT - 3, (SEQ ID NO: 3)
Primer2: 5'- AGTAATACCACATATTTATTATAT -3' (SEQ ID NO: 4) Primerl为位于 SEQ ID NO: 1的 5'端的第 lbp开始的正向序列;
Primer2为 SEQ ID NO: 1的中的 3,端反向序列。
扩增反应的条件: 在 50μ1的反应体积中含有 50mmol/L KC1, 10ramol/L Tris-HCl, pH8.5, 1.5mraol/L MgCl2, 200 mol/L dNTP, lOpmol引物, 1U的 Taq DM 聚合酶 (Clontech公司产品)。 在 PE9600型 DM热循环仪(Perkin-Elmer公司)上按下 列条件反应 25个周期: 94°C 30sec; 55。C 30sec; 72°C 2min。 在 RT-PCR时同时设 β-actin为阳性对照和模板空白为阴性对照。 扩增产物用 QIAGEN公司的试剂盒纯 化, 用 TA克隆试剂盒连接到 pCR载体上 ( Invitrogen公司产品) 。 DNA序列分析结 果表明 PCR产物的 DNA序列与 SEQ ID NO: 1所示的 l-1714bp完全相同。 实施例 3 Northern 印迹法分析人大麻醇受体蛋白 11基因的表达
用一步法提取总 RNA[Anal. Biochem 1987, 162, 156-159] 0 该法包括酸性硫 氰酸胍苯酚-氯仿抽提。 即用 4M异硫氰酸胍- 25m柠檬酸钠, 0.2M乙酸钠 ( pH4.0 ) 对组织进行匀浆, 加入 1倍体积的苯酚和 1/5体积的氯仿-异戊醇 (49: 1 ) , 混合 后离心。 吸出水相层, 加入异丙醇 (0.8体积) 并将混合物离心得到 RNA沉淀。 将 得到的 RNA沉淀用 70%乙醇洗涤, 干燥并溶于水中。 用 20μΕ RNA, 在含 20mM 3- ( N- 吗啉代) 丙磺酸 ( H7.0 ) -5mM乙酸钠 -IraM EDTA-2.2M甲醛的 1.2%琼脂糖凝胶上进 行电泳。 然后转移至硝酸纤维素膜上。 用 a-32P dATP通过随机引物法制备 32Ρ-标记 的 DNA探针。 所用的 DNA探针为图 1所示的 PCR扩增的人大麻醇受体蛋白 11编码区序 列(323bp至 625bp)。 将 32P-标记的探针 (约 2 χ 106cpm/ml ) 与转移了 RNA的硝酸纤 维素膜在一溶液中于 42°C杂交过夜, 该溶液包含 50%甲酰胺 -25mM KH2P04 ( pH7.4 ) - 5 χ SSC- 5 χ Denhardt's溶液和 20(^g/ml鲑精 DNA。 杂交之后, 将滤膜在 1 χ SSC- 0.1°/。SDS中于 55。C洗 30min。 然后, 用 Phosphor Imager进行分析和定量。 实施例 4 重组人大麻醇受体蛋白 11的体外表达、 分离和纯化
根据 SEQ ID N0: 1和图 1所示的编码区序列, 设计出一对特异性扩增引物, 序 列如下:
Priraer3: 5'- CATGCTAGCATGGTGGAAGGCAAGGAGGAGCAA -3' ( Seq ID No: 5 ) Primer4: 5'- CATGGATCCCTAACTTGCTTTTGATTTTACAGG -3, (Seq ID No: 6 ) 此两段引物的 5'端分别含有 Nhel和 BamHI酶切位点, 其后分别为目的基因 5,端 和 3'端的编码序列, Nhel和 BamHI酶切位点相应于表达载体质粒 pET- 28b(+) (Novagen公司产品, Cat. No.69865.3)上的选择性内切酶位点。 以含有全长 目的基因的 PBS- 0266g01质粒为模板, 进行 PCR反应。 PCR反应条件为: 总体积 50μ1 中含 pBS-0266g01质粒 10pg、 引物 Pr imer— 3和 Pr imer— 4分另 ij为 l Opmol 、 Advantage po lymerase Mix ( Clontech公司产品) 1μ1。 循环参数: 94。C 20s, 60。C 30s, 68。C 2 min,共 25个循环。 用 Nhel和 BamHI分别对扩增产物和质粒 pET- 28 (+)进行双酶切,分 别回收大片段,并用 T4连接酶连接。 连接产物转化用氯化钙法大肠杆细菌 DH5 CC ,在 含卡那霉素 (终浓度 30 g/ml ) 的 LB平板培养过夜后, 用菌落 PCR方法筛选阳性克 隆, 并进行测序。 挑选序列正确的阳性克隆 (PET- 0266g01 )用氯化钙法将重组质 粒转化大肠杆菌 BL21 (DE3) plySs (Novagen公司产品)。 在含卡那霉素 (终浓度 30 μ g/ml ) 的 LB液体培养基中, 宿主菌 BL21 ( PET-0266g01 )在 37°C培养至对数生长期, 加入 IPTG至终浓度 lmmol /L, 继续培养 5小时。 离心收集菌体, 经超声波破菌,离心 收集上清液, 用能与 6个组氨酸 (6Hi s- Tag ) 结合的亲和层析柱 Hi s. Bind Qui ck Cartr idge ( Novagen公司产品) 进行层析, 得到了纯化的目的蛋白人大麻醇受体 蛋白 11。 经 SDS- PAGE电泳, 在 l lKDa处得到一单一的条带 (图 2 ) 。 将该条带转移 至 PVDF膜上用 Edams水解法进行 N-端氨基酸序列分析,结果 N-端 15个氨基酸与 SEQ ID NO: 2所示的 N-端 15个氨基酸残基完全相同。 实施例 5 抗人大麻醇受体蛋白 11抗体的产生
用多肽合成仪 (PE公司产品)合成下述人大麻醇受体蛋白 11特异性的多肽: NH2-Met-Va l-Glu-Gly-Lys-Glu-Glu-G ln-Va l-Pro-Ser-Tyr-Met-Gly-Gly-C00H (SEQ ID NO: 7)。 将该多肽分别与血蓝蛋白和牛血清白蛋白耦合形成复合物, 方法 参见: Avrameas, et a l. I顏 unochemi s try, 1969; 6: 43。 用 ½g上述血蓝蛋白多肤 复合物加上完全弗氏佐剂免疫家兔, 15天后再用血蓝蛋白多肽复合物加不完全弗 氏佐剂加强免疫一次。 采用经 15 g/ml牛血清白蛋白多肽复合物包被的滴定板做 ELISA测定兔血清中抗体的滴度。 用蛋白 A-Sepharose从抗体阳性的家兔血清中分 离总 IgG。 将多肽结合于溴化氰活化的 Sepharose4B柱上, 用亲和层析法从总 igG中 分离抗多肽抗体。 免疫沉淀法证明纯化的抗体可特异性地与人大麻醇受体蛋白 11 结合。 实施例 6 本发明的多核苷酸片段用作杂交探针的应用
从本发明的多核苷酸中挑选出合适的寡核苷酸片段用作杂交探针有多方面的 用途, 如用该探针可与不同来源的正常组织或病理组织的基因组或 cDNA文库杂交 以鉴定其是否含有本发明的多核苷酸序列和检出同源的多核苷酸序列,进一步还可 用该探针检测本发明的多核苷酸序列或其同源的多核苷酸序列在正常组织或病理 组织细胞中的表达是否异常。
本实施例的目的是从本发明的多核苷酸 SEQ ID NO: 1 中挑选出合适的寡核苷 酸片段用作杂交探针, 并用滤膜杂交方法鉴定一些组织中是否含有本发明的多核 苷酸序列或其同源的多核苷酸序列。 滤膜杂交方法包括斑点印迹法、 Southern 印 迹法、 Northern 印迹法和复印方法等, 它们都是将待测的多核苷酸样品固定在滤 膜上后使用基本相同的步骤杂交。 这些相同的步骤是: 固定了样品的滤膜首先用 不含探针的杂交缓冲液进行预杂交, 以使滤膜上样品的非特异性的结合部位被载 体和合成的多聚物所饱和。 然后预杂交液被含有标记探针的杂交缓冲液替换, 并 保温使探针与靶核酸杂交。 杂交步骤之后, 未杂交上的探针被一系列洗膜步骤除 掉。 本实施例利用较高强度的洗膜条件 (如较低盐浓度和较高的温度), 以使杂交 背景降低且只保留特异性强的信号。 本实施例选用的探针包括两类: 第一类探针 是完全与本发明的多核苷酸 SEQ ID NO: 1相同或互补的寡核苷酸片段; 第二类探 针是部分与本发明的多核苷酸 SEQ ID NO: 1相同或互补的寡核苷酸片段。 本实施 例选用斑点印迹法将样品固定在滤膜上, 在较高强度的的洗膜条件下, 第一类探 针与样品的杂交特异性最强而得以保留。
一、 探针的选用
从本发明的多核苷酸 SEQ ID NO: 1 中选择寡核苷酸片段用作杂交探针, 应遵 循以下原则和需要考虑的几个方面:
1 , 探针大小优选范围为 18-50个核苷酸;
2, GC含量为 30%-70%, 超过则非特异性杂交增加;
3 , 探针内部应无互补区域;
4 , 符合以上条件的可作为初选探针, 然后进一步作计算机序列分析, 包括 将该初选探针分别与其来源序列区域 (即 SEQ ID NO: 1 ) 和其它已知的基因组序 列及其互补区进行同源性比较,若与非靶分子区域的同源性大于 85%或者有超过 15 个连续碱基完全相同, 则该初选探针一般就不应该使用;
5, 初选探针是否最终选定为有实际应用价值的探针还应进一步由实验确 定。
完成以上各方面的分析后挑选并合成以下二个探针:
探针 1 ( probel ), 属于第一类探针, 与 SEQ ID NO: 1 的基因片段完全同源 或互补 ( 41Nt ):
5 - TGGTGGAAGGCAAGGAGGAGCAAGTCCCGTCTTACATGGGT -3' ( SEQ ID NO: 8 ) 探针 2 ( probe2 ), 属于第二类探针, 相当于 SEQ ID NO: 1 的基因片段或其 互补片段的替换突变序列 (41Nt):
5'- TGGTGGAAGGCAAGGAGGAGCAAGTCCCGTCTTACATGGGT -3' ( SEQ ID NO: 9 ) 与以下具体实验步骤有关的其它未列出的常用试剂及其配制方法请参考文 献: 醒 PROBES G.H.Keller;M.M.Manak;Stockton Press,1989 (USA)以及更常 用的分子克隆实验手册书籍如 《分子克隆实验指南》 U998年第二版) [美]萨姆布 鲁克等著, 科学出版社。
样品制备:
1, 从新鲜或冰冻组织中提取 DNA
步骤: 1 ) 将新鲜或新鲜解冻的正常肝组织放入浸在冰上并盛有磷酸盐缓冲液 (PBS) 的平皿中。 用剪刀或手术刀将组织切成小块。 搡作中应保持组织湿润。 2) 以 lOOOg离心切碎组织 10分钟。 3 )用冷匀浆缓冲液 ( 0.25mol/L蔗糖; 25讓 ol/L Tris-HCl, pH7.5; 25mmol/L NaCl; 25mmol/L MgCl2 ) 悬浮沉淀 (大约 1 Oml/g )。 4) 在 4。C 用电动匀浆器以全速匀浆组织悬液, 直至组织被完全破碎。 5) lOOOg 离心 10分钟。 6)用重悬细胞沉淀(每 0. lg最初组织样品加 1- 5ml ), 再以 1000g离心 10分钟。 7)用裂解缓冲液重悬沉淀 (每 O. lg最初组织样品加 1ml ), 然后接以下 的苯酚抽提法。
2, DNA的苯酚抽提法
步骤: 1 )用 1- 10ml冷 PBS洗细胞, 1000g离心 10分钟。 2 )用冷细胞裂解 液重悬浮沉淀的细胞 (l x lO8细胞 /ml ) 最少应用 lOOul 裂解缓冲液。 3) 加 SDS 至终浓度为 1%, 如果在重悬细胞之前将 SDS 直接加入到细胞沉淀中, 细胞可能会 形成大的团块而难以破碎, 并降低总产率。 这一点在抽提 >107细胞时特别严重。 4) 加蛋白酶 K至终浓度 200ug/ml。 5) 50°C保温反应 1小时或在 37。C轻轻振摇过夜。 6)用等体积苯酚: 氯仿: 异戊醇 ( 25: 24: 1 )抽提, 在小离心机管中离心 10分 钟。 两相应清楚分离, 否则重新进行离心。 7) 将水相转移至新管。 8)用等体积 氯仿: 异戊醇 (24: 1 )抽提, 离心 10分钟。 9)将含 DNA的水相转移至新管。 然 后进行 DNA的纯化和乙醇沉淀。
3, DNA的纯化和乙醇沉淀
步骤: 1 )将 1 0体积 2mol/L醋酸钠和 1倍体积冷 100%乙醇加到 DNA溶液 中, 混匀。 在- 20°C放置 1 小时或过夜。 2) 离心 10分钟。 3)小心吸出或倒出乙 醇。 4)用 70%冷乙醇 500ul洗涤沉淀, 离心 5分钟。 5)小心吸出或倒出乙醇。 用 500ul 冷乙醇洗涤沉淀, 离心 5 分钟。 6)小心吸出或倒出乙醇, 然后在吸水纸上 倒置使残余乙醇流尽。 空气干燥 10-15 分钟, 以使表面乙醇挥发。 注意不要使沉 淀完全干燥, 否则较难重新溶解。 7) 以小体积 TE或水重悬 DNA沉淀。 低速涡旋 振荡或用滴管吹吸, 同时逐渐增加 TE, 混合至 DNA充分溶解, 每 1-5 χ 106细胞所 提取的大约加 lul。
以下第 8-13步骤仅用于必须除去污染时, 否则可直接进行第 14步骤。
8 ) 将 RNA酶 A加到 DNA溶液中, 终浓度为 lOOug/ml, 37°C保温 30分钟。 9 ) 加入 SDS和蛋白酶 K, 终浓度分别为 0.5%和 100ug/ml。 37°C保温 30分钟。 10) 用等体积的苯酚: 氯仿: 异戊醇 ( 25: 24: 1 )抽提反应液, 离心 10 分钟。 11 ) 小心移出水相, 用等体积的氯仿: 异戊醇 (24: 1 ) 重新抽提, 离心 10分钟。 12) 小心移出水相, 加 1/10体积 2mol/L醋酸钠和 2.5体积冷乙醇, 混匀置 -20。C 1小 时。 13 ) 用 70%乙醇及 100%乙醇洗涤沉淀, 空气干燥, 重悬核酸, 过程同第 3-6 步骤。 14) 测定 A26。和 A28。以检测 DNA的纯度及产率。 15 )分装后存放于 - 20°C。
样膜的制备:
1 )取 4 x 2 张适当大小的硝酸纤维素膜(NC 膜), 用铅笔在其上轻轻标出 点样位置及样号, 每一探针需两张 NC膜, 以便在后面的实验步骤中分别用高强度 条件和强度条件洗膜 。
2 ) 吸取及对照各 15微升, 点于样膜上, 在室温中晾干。
3) 置于浸润有 0. lmol/L NaOH, 1.5mol/L NaCl的滤纸上 5分钟 (两次), 晾干置于浸润有 0.5mol/L Tris-HCl ( pH7.0 ), 3mol/L NaCl 的滤纸上 5分钟 (两 次), 晾干。
4) 夹于干净滤纸中, 以铝箔包好, 60- 80°C真空干燥 2小时。
探针的标记
1 ) 3μ1 Probe ( 0. IOD/Ιθμΐ ), 加入 2μ1 Kinase缓冲液, 8-10 uCi γ-32Ρ- dATP+2U Kinase, 以补加至终体积 20μ1。
2 ) 37 °C 保温 2小时。
3)加 1/5体积的溴酚蓝指示剂 (BPB)。
4 )过 Sephadex G-50柱。
5) 至有 32P- Probe洗出前开始收集第一峰(可用 Monitor监测)。
6 ) 5滴 /管, 收集 10-15管。
7)用液体闪烁仪监测同位素量。
8 )合并第一峰的收集液后即为所需制备的 32P- Probe (第二峰为游离 γ- 32P- dATP )。 预杂交
将样膜置于塑料袋中,加入 3-10mg预杂交液( lOxDenhardt's; 6xSSC, 0. lrag/ml CT DNA (小牛胸腺 DNA))。 封好袋口后, 68°C水浴摇 2小时。
杂交
将塑料袋剪去一角, 加入制备好的探针, 封好袋口后, 42°C水洛摇过夜。 洗膜:
高强度洗膜:
1 )取出已杂交好的样膜。
2 ) 2xSSC, 0.1%SDS中, 40°C洗 15分钟 ( 2次)。
3 ) 0. lxSSC, 0.1%SDS中, 40°C洗 15分钟 ( 2次)。
4 ) 0. lxSSC, 0.1%SDS中, 55°C洗 30分钟 ( 2次), 室温晾干。 低强度洗膜:
1 )取出已杂交好的样膜。
2 ) 2xSSC, 0.1%SDS中, 37°C洗 15分钟 ( 2次)。
3 ) 0. lxSSC, 0.1%SDS中, 37°C洗 15分钟 ( 2次)。
4 ) 0. lxSSC, 0.1%SDS中, 40°C洗 15分钟 ( 2次), 室温晾干。
X -光自显影:
-70°C, X-光自显影 (压片时间根据杂交斑放射性强弱而定)。
实验结果:
采用低强度洗膜条件所进行的杂交实验, 以上两个探针杂交斑放射性强弱没 有明显区别; 而釆用高强度洗膜条件所进行的杂交实验, 探针 1 的杂交斑放射性 强度明显强于另一个探针杂交斑的放射性强度。 因而可用探针 1 定性和定量地分 析本发明的多核苷酸在不同组织中的存在和差异表达。 实施例 7 DNA Microarray
基因芯片或基因微矩阵 (DM Microarray)是目前许多国家实验室和大制药 公司都在着手研制和开发的新技术, 它是指将大量的靶基因片段有序地、 高密度 地排列在玻璃、 硅等载体上, 然后用荧光检测和计算机软件进行数据的比较和分 析, 以达到快速、 高效、 高通量地分析生物信息的目的。 本发明的多核苷酸可作 为靶 DNA 用于基因芯片技术用于高通量研究新基因功能; 寻找和筛选组织特异性 新基因特别是肿瘤等疾病相关新基因; 疾病的诊断, 如遗传性疾病。 其具体方法 步骤在文献中已有多种报道, 如可参阅文献 DeRisi, J. L. ,Lyer, V. &Brown,P.0. (1997) Science 278, 680-686.及文献 Helle, R. A., Schema, M. , Chai, A., Shalom, D., (1997) PNAS 94: 2150-2155.
(一) 点样
各种不同的全长 cDNA共计 4000条多核苷酸序列作为靶 DNA,其中包括本发明 的多核苷酸。 将它们分别通过 PCR 进行扩增, 纯化所得扩增产物后将其浓度调到 500ng/ul左右, 用 Cartesian 7500点样仪(购自美国 Cartesian公司)点于玻璃介 质上, 点与点之间的距离为 280μΐη。 将点样后的玻片进行水合、 干燥, 置于紫外 交联仪中交联, 洗脱后干燥使 DNA 固定在玻璃片上制备成芯片。 其具体方法步骤 在文献中已有多种报道。 本实施例的点样后处理步骤是:
1. 潮湿环境中水合 4小时;
2. 0.2%SDS洗涤 1分钟;
3. ddH20洗涤两次, 每次 1分钟;
4. NaBH4封闭 5分钟;
5. 95°C水中 2分钟;
6. 0.2%SDS洗涤 1分钟;
7. ddH20冲洗两次;
8. 凉干, 25°C储存于暗处备用。
(二)探针标记
用一步法分别从人体混合组织与机体特定组织 (或经过刺激的细胞株) 中抽 提总 mRNA, 并用 Oligotex mRNA Midi Kit (购自 QiaGen公司)纯化 mRNA,通过反转 录分别将荧光试剂 Cy3dUTP(5-Araino-propargyl-2'-deoxyuridine 5'- triphate coupled to Cy3 fluorescent dye, 购自 Amersham Phamacia Biotech公司)标记 人体混合组织的 mRNA, 用荧光试剂 Cy5dUTP(5- Amino- propargyl-2'-deoxyuridine 5'-tr iphate coupled to Cy5 fluorescent dye, 购自 Amersham Phamacia Biotech 公司)标记机体特定组织 (或经过刺激的细胞株) mRNA, 经纯化后制备出探针。 具 体步骤参照及方法见:
Schena, M. , Shalon, D. , Heller, R. (1996) Proc. Natl. Acad. Sci. USA. Vol.93: 10614-10619. Schena,M. , Shalon, Dari., Davis, R. W. (1995) Science.270 (20): 467-480.
(三) 杂交
分别将来自以上两种组织的探针与芯片一起在 UniHyb™ Hybridization So lut ion (购自 Te leChem公司)杂交液中进行杂交 16 小时, 室温用洗涤液 ( 1 χ SSC, 0. 2%SDS ) 洗涤后用 ScanArray 3000扫描仪 (购自美国 Genera l Scanni ng公 司)进行扫描, 扫描的图象用 Imagene软件 (美国 Biodi scovery公司)进行数据 分析处理, 算出每个点的 Cy3/Cy5比值。
以上机体特定组织 (或经过刺激的细胞株)分别为胸腺、 睾丸、 肌肉、 脾脏、 肺、 皮肤、 甲状腺、 肝、 PMA+的 Ecv304细胞株、 PMA -的 Ecv304细胞株、 未饥饿的 L02细胞株、 砷刺激 1小时的 L02细胞株以及前列腺组织。 根据这 1 3个 Cy3/Cy5比值 绘出折方图 (图 1 ) 。 由图可见本发明所述的人大麻醇受体蛋白 11和人中枢大麻醇 受体表达谱很相似。

Claims

拟利要隶
1、 一种分离的多肽-人大麻醇受体蛋白 Π , 其特征在于它包含有: SEQ ID NO: 2所示的氨基酸序列的多肽、 或其多肽的活性片段、 类似物或衍生物。
2、 如权利要求 1 所述的多肽, 其特征在于所述多肽、 类似物或衍生物的 氨基酸序列具有与 SEQ ID NO: 2所示的氨基酸序列至少 95%的相同性。
3、 如权利要求 2 所述的多肽, 其特征在于它包含具有 SEQ ID NO: 2 所示 的氨基酸序列的多肽。
4、 一种分离的多核苷酸, 其特征在于所述多核苷酸包含选自下组中的一 种:
(a) 编码具有 SEQ I D NO: 2 所示氨基酸序列的多肽或其片段、 类似物、 衍 生物的多核苷酸;
(b) 与多核苷酸 ) 互补的多核苷酸; 或
(c) 与 (a ) 或 (b ) 有至少 70%相同性的多核苷酸。
5、 如权利要求 4 所述的多核苷酸, 其特征在于所述多核苷酸包含编码具 有 SEQ ID NO: 2所示氨基酸序列的多核苷酸。
6、 如权利要求 4 所述的多核苷酸, 其特征在于所述多核苷酸的序列包含 有 SEQ I D NO: 1 中 323-625位的序列或 SEQ ID NO: 1 中 1-1 714位的序列。
7、 一种含有外源多核苷酸的重组载体, 其特征在于它是由权利要求 4 - 6 中的任一权利要求所述多核苷酸与质粒、 病毒或运载体表达载体构建而成的重 组载体。
8、 一种含有外源多核苷酸的遗传工程化宿主细胞, 其特征在于它是选自 于下列一种宿主细胞:
(a) 用权利要求 7所述的重组载体转化或转导的宿主细胞; 或
(b) 用权利要求 4-6 中的任一权利要求所述多核苷酸转化或转导的宿主细 胞。
9、 一种具有人大麻醇受体蛋白 1 1 活性的多肽的制备方法, 其特征在于所 述方法包括:
(a) 在表达人大麻醇受体蛋白 1 1 条件下, 培养权利要求 8 所述的工程化 宿主细胞;
(b) 从培养物中分离出具有人大麻醇受体蛋白 11活性的多肽。
1 0、 一种能与多肽结合的抗体,其特征在于所述抗体是能与人大麻醇受体 蛋白 11特异性结合的抗体。
11、 一类模拟或调节多肽活性或表达的化合物, 其特征在于它们是模拟、 促进、 拮抗或抑制人大麻醇受体蛋白 11的活性的化合物。
12、 如权利要求 11 所述的化合物, 其特征在于它是 SEQ ID NO: 1 所示的 多核苷酸序列或其片段的反义序列。
13、 一种权利要求 11 所述化合物的应用, 其特征在于所述化合物用于调 节人大麻醇受体蛋白 11在体内、 体外活性的方法。
14、 一种检测与权利要求 1-3中的任一权利要求所述多肽相关的疾病或疾 病易感性的方法, 其特征在于其包括检测所述多肽的表达量, 或者检测所述多 肽的活性, 或者检测多核苷酸中引起所述多肽表达量或活性异常的核苷酸变 异。
15、 如权利要求 1-3 中的任一权利要求所述多肽的应用, 其特征在于它应 用于筛选人大麻醇受体蛋白 11 的模拟物、 激动剂, 拮抗剂或抑制剂; 或者用 于肽指紋图谱鉴定。
16、 如权利要求 4-6 中的任一权利要求所述的核酸分子的应用, 其特征在 于它作为引物用于核酸扩增反应, 或者作为探针用于杂交反应, 或者用于制造 基因芯片或微阵列。
17、 如权利要求 1-6及 11 中的任一权利要求所述的多肽、 多核苷酸或化 合物的应用, 其特征在于用所述多肽、 多核苷酸或其模拟物、 激动剂、 拮抗剂 或抑制剂以安全有效剂量与药学上可接受的载体组成作为诊断或治疗与人大麻 醇受体蛋白 11异常相关的疾病的药物组合物。
18、 权利要求 1-6 及 11 中的任一杈利要求所述的多肽、 多核苷酸或化合 物的应用, 其特征在于用所述多肽、 多核苷酸或化合物制备用于治疗如恶性肿 瘤, 血液病, HIV感染和免疫性疾病和各类炎症的药物。
PCT/CN2001/000236 2000-03-15 2001-02-26 Novel polypeptide - a human cannabis alcohol receptor protein 11 and polynucleotide encoding it WO2001074997A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU46294/01A AU4629401A (en) 2000-03-15 2001-02-26 A novel polypeptide, human cannabinoid reception protein 11 and the polynucleotide encoding the polypeptide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 00114903 CN1313320A (zh) 2000-03-15 2000-03-15 一种新的多肽——人大麻醇受体蛋白11和编码这种多肽的多核苷酸
CN00114903.2 2000-03-15

Publications (2)

Publication Number Publication Date
WO2001074997A2 true WO2001074997A2 (en) 2001-10-11
WO2001074997A3 WO2001074997A3 (fr) 2002-06-06

Family

ID=4584378

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2001/000236 WO2001074997A2 (en) 2000-03-15 2001-02-26 Novel polypeptide - a human cannabis alcohol receptor protein 11 and polynucleotide encoding it

Country Status (3)

Country Link
CN (1) CN1313320A (zh)
AU (1) AU4629401A (zh)
WO (1) WO2001074997A2 (zh)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5948777A (en) * 1997-03-18 1999-09-07 Smithkline Beecham Corporation Cannabinoid receptor agonists

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5948777A (en) * 1997-03-18 1999-09-07 Smithkline Beecham Corporation Cannabinoid receptor agonists

Also Published As

Publication number Publication date
WO2001074997A3 (fr) 2002-06-06
CN1313320A (zh) 2001-09-19
AU4629401A (en) 2001-10-15

Similar Documents

Publication Publication Date Title
WO2001072786A1 (fr) Nouveau polypeptide, facteur d'inhibition tumorale 63, et polynucleotide codant pour ce polypeptide
WO2001074997A2 (en) Novel polypeptide - a human cannabis alcohol receptor protein 11 and polynucleotide encoding it
WO2001083538A1 (fr) Nouveau polypeptide, proteine humaine 36 du gene k-ras, et polynucleotide codant pour ce polypeptide
WO2001079423A2 (en) A novel polypeptide, human bcr protein 10 and the polynucleotide encoding said polypeptide
WO2001070965A1 (fr) Nouveau polypeptide, facteur humain de regulation de la transcription 15, et polynucleotide codant pour ce polypeptide
WO2001072801A1 (fr) Nouveau polypeptide, proteine ribosomale humaine s11 12, et polynucleotide codant pour ce polypeptide
WO2001064721A1 (fr) Nouveau polypeptide, adenosine triphosphatase 30, et polynucleotide codant pour ce polypeptide
WO2001090177A1 (fr) Nouveau polypeptide, activateur humain de la mort naturelle des cellules b13.64, et polynucleotide codant ce polypeptide
WO2001068693A1 (fr) Nouveau polypeptide, proteine humaine de reception cannabinoide 7, et polynucleotide codant pour ce polypeptide
WO2001068873A1 (fr) Nouveau polypeptide, molecule humaine d'adhesion intercellulaire 12, et polynucleotide codant pour ce polypeptide
WO2001090352A1 (fr) Nouveau polypeptide, proteine 110.12 de liaison avec le centrosome nek-2, et polynucleotide codant ce polypeptide
WO2001079439A2 (fr) Nouveau polypeptide, proteine humaine de reception cannabinoide 19, et un polynucleotide codant pour ce polypeptide
WO2001053499A1 (fr) Nouveau polypeptide, proteine nucleolaire humaine 18 de proliferation cellulaire, et polynucleotide codant pour ce polypeptide
WO2001074871A1 (fr) Nouveau polypeptide, camp-phosphodiesterase humaine 13, et polynucleotide codant pour ce polypeptide
WO2001055184A1 (fr) Nouveau polypeptide, proteine humaine a doigt de zinc 19, et polynucleotide codant pour ce polypeptide
WO2001068692A1 (fr) Nouveau polypeptide, proteine humaine conjuguee du cancer de la retine 9, et polynucleotide codant pour ce polypeptide
WO2002011511A1 (fr) Nouveau polypeptide, modulateur negatif 11.66 de la proteine d'activation de la gtpase, et polynucleotide codant ce polypeptide
WO2001075059A2 (en) A novel polypeptide, human gtp-regulatory protein 11 and a polynucleotide encoding the same
WO2001079491A1 (fr) Nouveau polypeptide, canal ionique humain 12 pour le chlore, et polynucleotide codant pour ce polypeptide
WO2001073061A1 (fr) Nouveau polypeptide, proteine humaine 22 du retinoblastome, et polynucleotide codant pour ce polypeptide
WO2001075033A2 (fr) Veau polypeptide, proteine humaine 9 de regulation du cycle mi totique, et polynucleotide codant pour ce polypeptide
WO2001074892A1 (fr) Nouveau polypeptide, proteine antigene prostatique specifique membranaire 12, et polynucleotide codant pour ce polypeptide
WO2001075001A2 (fr) Nouveau polypeptide, protéine kinase humaine dépendant de l'adénosine cyclique 9, et poynucléotide codant pour ce polypeptide
WO2001083728A1 (fr) Nouveau polypeptide, proteine humaine de transport d'acides amines excitateurs 9, et polynucleotide codant pour ce polypeptide
WO2001074128A2 (fr) Nouveau polypeptide, microtubuline 11, et polynucléotide codant pour ce polypeptide

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: JP