WO2001083687A2 - Nouveau polypeptide, proteine pax humaine 23, et polynucleotide codant pour ce polypeptide - Google Patents

Nouveau polypeptide, proteine pax humaine 23, et polynucleotide codant pour ce polypeptide Download PDF

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Publication number
WO2001083687A2
WO2001083687A2 PCT/CN2001/000646 CN0100646W WO0183687A2 WO 2001083687 A2 WO2001083687 A2 WO 2001083687A2 CN 0100646 W CN0100646 W CN 0100646W WO 0183687 A2 WO0183687 A2 WO 0183687A2
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Prior art keywords
polypeptide
polynucleotide
pax protein
human pax
protein
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PCT/CN2001/000646
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English (en)
Chinese (zh)
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WO2001083687A3 (fr
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Yumin Mao
Yi Xie
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Shanghai Biowindow Gene Development Inc.
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Priority to AU78347/01A priority Critical patent/AU7834701A/en
Publication of WO2001083687A2 publication Critical patent/WO2001083687A2/fr
Publication of WO2001083687A3 publication Critical patent/WO2001083687A3/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
    • C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents

Definitions

  • the present invention belongs to the field of biotechnology. Specifically, the present invention describes a novel polypeptide, a human Pax protein 23, and a polynucleotide sequence encoding the polypeptide. The invention also relates to the preparation method and application of the polynucleotide and polypeptide.
  • Pax is a family of genes.
  • the proteins encoded by Pax genes act as transcription factors during cell differentiation and embryonic development. Such genes are highly conserved in spinal stimuli and lower organisms.
  • the Pax gene is characterized by a paired box domain, which encodes a protein domain to help identify specific DNA sequences. Paired Box Domain has D-binding activity and has an alpha helix at its amino terminus, which is of great significance for its binding to DNA (Genes Dev 1991 Apr; 5 (4): 594-604).
  • the paired box domain is composed of 124 amino acid residues and is found in many proteins in many organisms, including the mammalian PAX protein family. Although the function of the paired box domain is not clear at present, it is mostly located at the N-terminus of proteins such as PAX, which has extremely important regulatory significance for the normal function of PAX proteins.
  • PAX proteins All paired box domains contain a conserved region that contains the following consistent sequence fragments: RPC-x (ll) -CVS. This sequence fragment is contained in PAX proteins in many different organisms. This structure Motifs play a very important role in the process of protein's normal physiological function. For the specific structure and chromosomal localization of the paired box domain of PAX protein, please refer to related literature (Nat Genet 1993 Apr; 3 (4): 292- 8 ). PAX proteins can bind to DNA, which depends on the DNA binding activity of the Paired Box Domain. Pax gene expression plays an important role in the development of organisms.
  • Pax gene is still present in human tumor tissues, and experimental results in vivo and in vitro have proved that Pax gene is a possible oncogene (Adv Clin Path 1997 Oct; 1 (4): 243- 255 ). Studies have also shown that Pax gene expression is extremely important for regulating the early formation of organisms' organs (Cancer Res 1999 Apr 1; 59 (7 Suppl): 1707s-1709s; discussion 1709s-1717s). In addition, studies have shown that PAX-3 and PAX-6 are related to the occurrence and treatment of Waardenburg's syndrome (Nat Genet 1993 Apr; 3 (4): 292-8).
  • the human Pax protein 23 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 it has been necessary to identify more people involved in these processes Pax protein 23 protein, especially the amino acid sequence of this protein is identified. Isolation of the new Pax protein 23 protein encoding gene also provides a 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 isolating its coding DNA is important. Object of the invention
  • Another object of the invention is to provide a polynucleotide encoding the polypeptide.
  • Another object of the present invention is to provide a method for producing human Pax protein 23.
  • Another object of the present invention is to provide an antibody against the polypeptide of the present invention, human Pax protein 23.
  • Another object of the present invention is to provide mimic compounds, antagonists, agonists, and inhibitors against human polypeptide Pax protein 23 of the polypeptide of the present invention.
  • Another object of the present invention is to provide a method for diagnosing and treating diseases associated with abnormalities in human Pax protein 23. Mingzha
  • the present invention relates to an isolated polypeptide, which is of human origin, and includes: a polypeptide having the amino acid sequence of SEQ ID D. 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 of positions 766-1 to 386 in SEQ ID NO: 1; and (b) a sequence of 1 to 1 in SEQ ID NO: 1 1677-bit sequence.
  • the invention further relates to a vector, in particular an expression vector, containing the polynucleotide of the invention; a host cell genetically engineered with the vector, including a transformed, transduced or transfected host cell; and a method comprising culturing said Host cell and method of preparing the polypeptide of the present invention by recovering the expression product.
  • a vector in particular an expression vector, containing the polynucleotide of the invention
  • a host cell genetically engineered with the vector including a transformed, transduced or transfected host cell
  • a method comprising culturing said 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 invention also relates to a method for screening compounds that mimic, activate, antagonize or inhibit the activity of human Pax protein 23 protein, which comprises utilizing the polypeptide of the 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 human Pax protein 23 protein, comprising detecting a mutation in the polypeptide or a polynucleotide sequence encoding the same in a biological sample, or detecting a mutation in a biological sample The amount or biological activity of a polypeptide of the invention.
  • the present invention also relates to a pharmaceutical composition
  • a pharmaceutical composition comprising a polypeptide of the present invention or a mimetic thereof, an activator, an antagonist or an inhibitor, and a pharmaceutically acceptable carrier.
  • the present invention also relates to the use of the polypeptide and / or polynucleotide of the present invention in the preparation of a medicament for treating cancer, developmental disease or immune disease or other diseases caused by abnormal expression of human Pax protein 23.
  • FIG. 1 is a comparison diagram of gene chip expression profiles of human Pax protein 23 and human Pax protein 12 of the present invention.
  • the upper graph is a graph of the expression profile of human Pax protein 23, and the lower graph is the graph of the expression profile of human Pax protein 12.
  • 1 indicates fetal kidney
  • 2 indicates fetal large intestine
  • 3 indicates fetal small intestine
  • 4 indicates fetal muscle
  • 5 indicates fetal brain
  • 6 indicates fetal bladder
  • 7 indicates unstarved L02
  • 8 indicates L02 +, lhr, As 3+
  • 9 indicates ECV304 PMA-
  • 10 means ECV 304 PMA +
  • 11 means fetal liver
  • 12 means normal liver
  • 13 means thyroid
  • 14 means skin
  • 15 means fetal lung
  • 16 means lung
  • 17 means lung cancer
  • 18 means fetal spleen
  • 19 means The spleen
  • 20 is the prostate
  • 21 is the fetal heart
  • 22 is the heart
  • 23 is the muscle
  • 24 is the testis
  • 25 is the fetal thymus
  • 26 is the thymus.
  • FIG. 2 is a polyacrylamide gel electrophoresis image (SDS-PAGE) of an isolated human Pax protein 23.
  • FIG. 23kDa is the molecular weight of the protein. The arrow indicates the isolated protein band. Summary of the invention
  • 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 R, 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 protein or polynucleotide “variant” 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 substituted amino acid has a structural or chemical property similar to the original amino acid, such as the replacement of 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 refers to an alteration in the amino acid sequence or nucleotide sequence that results in an increase in one or more amino acids or nucleotides compared to a naturally occurring molecule.
  • 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 to specific antibodies in a suitable animal or cell.
  • An "agonist” refers to a molecule that, when combined with human Pax protein 23, causes a change in the protein to regulate the activity of the protein.
  • An agonist may include a protein, a nucleic acid, a carbohydrate, or any other molecule that binds human Pax protein 23.
  • Antagonist refers to a molecule that, when combined with human Pax protein 23, can block or modulate the biological or immunological activity of human Pax protein 23.
  • Antagonists and inhibitors may include proteins, nucleic acids, carbohydrates or any other molecule that can bind human Pax protein 23.
  • Regular refers to a change in the function of human Pax protein 23, including an increase or decrease in protein activity, a change in binding properties, and any other biological, functional, or immune properties of human Pax protein 23.
  • 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 Pax protein 23 using standard protein purification techniques. Essentially pure Pax Protein 23 produces a single main band on a non-reducing polyacrylamide gel. The purity of the human Pax protein 23 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 can 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
  • Substantially homologous sequences or hybridization probes can compete and inhibit the binding of completely homologous sequences to the target sequence under conditions of reduced stringency. This does not mean that conditions with reduced stringency allow non-specific binding, because conditions with 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 the same 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., Madi son Wis.). The MEGALIGN program can compare two or more sequences based on different methods such as the Cluster method (Higg ins, D. G. and P. M. Sharp (1988)
  • the Clus ter method arranges groups of sequences into clusters by checking the distance between all pairs. 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:
  • the percent identity between nucleic acid sequences can also be determined by the Clus ter method or by methods known in the art such as Jotun Hein (Hein J., (1990) Methods in enzymology 183: 625-645). 0
  • 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 the “sense strand”.
  • Derivative refers to HFP or a chemical modification of its nucleic acid. This chemical modification can be used A fluorenyl, acyl or amino group replaces a hydrogen atom. Nucleic acid derivatives can encode polypeptides that retain the main biological properties of natural molecules.
  • Antibody refers to an intact antibody molecules and fragments thereof, such as Fa, F (a b ') 2 and F V, which specifically binds to 23 human Pax protein antigen determinant.
  • 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 animal, but the same polynucleotide or polypeptide is separated from some or all of the substances that coexist 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 part 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 existing in the natural state. .
  • isolated human Pax protein 23 means that human Pax protein 23 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 Pax protein 23 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 Pax protein 23 polypeptide can be analyzed by amino acid sequence.
  • the present invention provides a new polypeptide, human Pax protein 23, which basically consists of the amino acid sequence shown in SEQ ID 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 may be naturally purified products or chemically synthesized products, or produced using recombinant techniques from prokaryotic or eukaryotic hosts (eg, bacteria, yeast, higher plants, insects, and mammalian cells). 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 Pax protein 23.
  • fragment refers to a polypeptide that substantially maintains the same biological function or activity of the human Pax protein 23 of the present invention.
  • a fragment, derivative or analog of the polypeptide of the present invention may be: (I) a type 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 the genetic code; or ( ⁇ ) such a type in which one group on one or more amino acid residues is replaced by another
  • the group substitution comprises a substituent; or (in) such a type in which the mature polypeptide is fused with another compound (such as a compound that prolongs the half-life of the polypeptide, such as polyethylene glycol); or (IV) such a type in which additional A polypeptide sequence formed by fusing an amino acid sequence into a mature polypeptide (such as a leader sequence or a secreted sequence or a sequence used to purify the polypeptide or a protein sequence).
  • such fragments, 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 a 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 1677 bases in length and its open reading frame 766-1 386 encodes 206 amino acids. According to the comparison of gene chip expression profiles, it was found that this peptide has a similar expression profile to human Pax protein 12, and it can be deduced that the human Pax protein 23 has similar functions to human Pax protein 12.
  • the polynucleotide of the present invention may be in the form of DNA or RNA.
  • DNA forms include cDNA, genomic D, or synthetic DNA.
  • DNA can be single-stranded or double-stranded.
  • DNA can be coding or non-coding.
  • the coding region sequence encoding the 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.
  • polynucleotide encoding a polypeptide refers to a polynucleotide that includes the polypeptide and a polynucleotide that includes additional coding and / or non-coding 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.
  • This polynucleotide variant can be a naturally occurring allelic variant or a non-naturally occurring variant.
  • 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 invention particularly relates to polynucleotides that can hybridize to the polynucleotides of the 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) Add change when crossing Sex agent, such as 50% (v / v) formamide, 0.1% calf serum / 0.1% F i co ll, 42 ° C, etc .; or (3) only the identity between the two sequences Crosses occur at least 95% and more preferably 97%.
  • 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 nucleotides. Nucleotides 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 Pax protein 23.
  • 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 Pax protein 23 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 D fragment sequence of the present invention can also be obtained by the following methods: 1) separating a double-stranded DNA sequence from genomic DNA; 2) chemically synthesizing the DNA 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 cD library.
  • Various methods have been used to extract mRNA, and kits are also commercially available (Qiagene).
  • the construction of cDNA libraries is also a common method (Sambrook, et al., Molecu lar Cloning, A Labora tory Manua, Cold Harbor Labora tory. New York, 1989).
  • Commercially available cDNA libraries are also available, such as different cDNA libraries from Clontech. When combined with polymerase reaction technology, 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) measuring the level of human Pax protein 23 transcripts; (4) passing Immunological techniques or assays for biological activity to detect gene-expressed protein products. 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 generally a DNA 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, luciferin, or enzymes (such as alkaline phosphatase).
  • immunological techniques such as Western blotting, radioimmunoprecipitation, and enzyme-linked immunosorbent assay (ELISA) can be used to detect the protein product of human Pax protein 23 gene expression.
  • ELISA enzyme-linked immunosorbent assay
  • a method of applying a PCR technique to amplify DNA / RNA is preferably used to obtain the gene of the present invention.
  • the RACE method RACE-cDM terminal rapid amplification method
  • the primers used for PCR can be appropriately based on the polynucleotide sequence information of the present invention disclosed herein.
  • 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 D fragments and the like obtained as described above can be determined 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, the sequencing must 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 produced by genetic engineering using the vector of the present invention or directly using a human Pax protein 23 coding sequence, and a method for producing a polypeptide according to the present invention by recombinant technology.
  • a polynucleotide sequence encoding the human Pax protein 23 may 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 vectors (Rosenberg, et al.
  • 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 Pax protein 23 and appropriate transcriptional / translational regulatory elements. These methods include in vitro recombinant DNA techniques, DNA synthesis techniques, in vivo recombinant technology (Sambroook, et al. Molecular Cloning , a Laboratory Manual, Cold Spring Harbor Laboratory. New York, 1989) the DNA sequence may be 0 operably linked to expression An appropriate promoter in the vector to direct mRNA synthesis. Representative examples of these promoters are: the lac or trp promoter of E.
  • the expression vector also includes a ribosome binding site and a transcription terminator for translation initiation. 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. Illustrative examples include SV40 enhancers of 100 to 270 base pairs on the late side of the origin of replication, polyoma enhancers on the late side of the origin of replication, and adenovirus enhancers.
  • 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 Pax protein 23 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 the 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.
  • Transformation of a host cell with a DNA sequence described in the present invention or a recombinant vector containing the DNA sequence can be performed using conventional techniques well known to those skilled in the art.
  • the host is a prokaryote, such as E. coli
  • competent cells capable of absorbing D can be harvested after the exponential growth phase and treated with the CaCl 2 method. The steps used are well known in the art. Alternatively, MgCl 2 is used. If necessary, transformation can also be performed by electroporation.
  • the host is a eukaryotic organism, the following D transfection methods can be used: calcium phosphate co-precipitation, or conventional mechanical methods such as microinjection, electroporation, and liposome packaging.
  • the polynucleotide sequence of the present invention can be used to express or produce recombinant human Pax protein 23 by conventional recombinant DNA technology (Sc ience, 1984; 224: 1431). Generally there are the following steps:
  • 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 cell has grown to an appropriate cell density, the selected promoter is induced by a suitable method (such as temperature conversion or chemical induction), and the cell is re- Cultivate for a while.
  • 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.
  • recombinant proteins can be isolated and purified by various separation methods using their 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.
  • 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, HIV infections and immune diseases.
  • Pax is a family of genes.
  • the proteins encoded by Pax genes play a role as transcription factors during cell differentiation and embryonic development.
  • the specific paired box domains on Pax genes encode a protein domain that helps identify specific DNA sequences . Paired box domains are found in many proteins in many organisms, mainly in the PAX protein family in mammals.
  • Pax gene expression plays an important role in the development of organisms. Recent studies have also shown that Pax gene is also present in human tumor tissue, and experimental results in vivo and in vitro have demonstrated that Pax gene is a possible oncogene. (Adv C l in Path 1997 Oc t; 1 (4): 243-255). Studies have also shown that Pax gene expression is extremely important for regulating the early formation of organs in organisms. (Cancer Res 1999 Apr 1; 59 (7 Supp l): 1707 s-1710s.) In addition, studies have shown that PAX-3 and PAX-6 are related to the occurrence and treatment of Waardenburg syndrome.
  • the abnormal expression of the human Pax protein 23 of the present invention will produce various diseases, especially Waardenburg's syndrome, embryonic developmental disorders, growth disorders, and tumors. These diseases include, but are not limited to:
  • Embryonic developmental disorders congenital abortion, cleft palate, facial oblique fissure, limb absentness, limb differentiation disorder, gastrointestinal atresia or stenosis, hyaline membrane disease, atelectasis, polycystic kidney disease, heterotopic kidney, double ureter, cryptorchid , Congenital inguinal hernia, double uterus, vaginal atresia, hypospadias, hermaphroditism, atrial septal defect, ventricular septal defect, pulmonary stenosis, arterial duct occlusion, neural tube defect, congenital hydrocephalus, iris defect, congenital Cataract, congenital glaucoma or cataract, congenital deafness
  • Tumors of various tissues stomach cancer, liver cancer, lung cancer, esophageal cancer, breast cancer, leukemia, lymphoma, Thyroid tumor, uterine fibroids, neuroblastoma, astrocytoma, ependymoma, glioblastoma, colon cancer, malignant histiocytosis, melanoma, teratoma, sarcoma, adrenal cancer, bladder cancer, Bone cancer, osteosarcoma, myeloma, bone marrow cancer, brain cancer, uterine cancer, endometrial cancer, gallbladder cancer, thymic tumor, nasal cavity and sinus tumor, nasopharyngeal cancer, laryngeal cancer, tracheal tumor, pleural mesothelioma, fiber Tumor, fibrosarcoma, lipoma, liposarcoma, leiomyoma
  • Growth and development disorders mental retardation, cerebral palsy, brain development disorders, mental retardation, familial cerebral nucleus dysplasia syndrome, strabismus, skin, fat and muscular dysplasia such as congenital skin laxity, premature aging Disease, congenital keratosis, various metabolic defects such as various amino acid metabolic defects, stunting, dwarfism, sexual retardation
  • Abnormal expression of the human Pax protein 23 of the present invention will also produce certain hereditary, hematological and immune system diseases.
  • the invention also provides methods for screening compounds to identify agents that increase (agonist) or suppress (antagonist) human Pax protein 23.
  • Agonists enhance biological functions such as human Pax protein 23 to stimulate cell proliferation, while antagonists prevent and treat disorders related to excessive cell proliferation, such as various cancers.
  • mammalian cells or a membrane preparation expressing human Pax protein 23 can be cultured together with labeled human Pax protein 23 in the presence of a drug. The ability of the drug to increase or block this interaction is then determined.
  • Antagonists of human Pax protein 23 include selected antibodies, compounds, receptor deletions, and the like. Antagonists of human Pax protein 23 can bind to human Pax protein 23 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 perform biological functions.
  • human Pax protein 23 can be added to a bioanalytical assay to determine whether a compound is an antagonist by measuring the effect of the compound on the interaction between human Pax protein 23 and its receptor.
  • receptor deletions and analogs that act as antagonists can be screened.
  • Polypeptide molecules capable of binding to human Pax protein 23 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 Pax protein 23 molecule should generally be labeled.
  • the present invention provides a method for producing an antibody using a polypeptide, a fragment, a derivative, an analog thereof, or a cell thereof as an antigen.
  • These antibodies can be polyclonal or monoclonal antibodies.
  • the invention also provides antibodies against human Pax protein 23 epitopes. These antibodies include (but are not limited to): polyclonal antibodies, monoclonal antibodies, chimeric antibodies, single chain antibodies, Fab fragments, and fragments produced by Fab expression libraries.
  • Polyclonal antibodies can be produced by injecting human Pax protein 23 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 adjuvant.
  • Techniques for preparing monoclonal antibodies to human Pax protein 23 include, but are not limited to, hybridoma technology (Kohler and Mi lste in. Nature, 1975, 256: 495-497), triple tumor technology, human B-cell hybridoma technology, EBV-hybridoma technology, etc.
  • Chimeric antibodies that bind human constant regions to non-human-derived variable regions can be produced using existing techniques (Morrison et al, PNAS, 1985, 81: 6851).
  • the existing technology for producing single chain antibodies (US Pat No. 4946778) can also be used to produce single chain antibodies against human Pax protein 23.
  • Antibodies against human Pax protein 23 can be used in immunohistochemistry to detect human Pax protein 2 in biopsy specimens.
  • Monoclonal antibodies that bind to human Pax protein 23 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 Pax protein 2 3 high affinity monoclonal antibodies can covalently bind to bacterial or plant toxins (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 disulfide exchange. This hybrid antibody can be used to kill human Pax protein 23 positive cells.
  • the antibodies of the present invention can be used to treat or prevent diseases related to human Pax protein 23.
  • Administration of appropriate doses of antibodies can stimulate or block the production or activity of human Pax protein 23.
  • the invention also relates to a diagnostic test method for quantitative and localized detection of human Pax protein 23 levels. These tests are well known in the art and include FI SH assays and radioimmunoassays.
  • the level of human Pax protein 23 detected in the test can be used to explain the importance of human Pax protein 23 in various diseases and to diagnose diseases in which human Pax protein 2 3 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, and more preferably mass spectrometry.
  • Polynucleotides encoding human Pax protein 23 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 Pax protein 23.
  • Recombinant gene therapy vectors (such as viral vectors) can be designed to express mutated human Pax protein 23 to inhibit endogenous human Pax protein 23 activity.
  • a mutated human Pax protein 23 may be a shortened human Pax protein 23 without a signaling domain, and although it can bind to a downstream substrate, it lacks signaling activity. Therefore, the recombinant gene therapy vector can be used to treat diseases caused by abnormal expression or activity of human Pax protein 23.
  • Virus-derived expression vectors such as retrovirus, adenovirus, adenovirus-associated virus, herpes simplex virus, parvovirus, etc. can be used to transfer a polynucleotide encoding human Pax protein 23 into cells.
  • a method for constructing a recombinant viral vector carrying a polynucleotide encoding a human Pax protein 23 can be found in the existing literature (Sambrook, eta l.).
  • recombinant polynucleotide encoding human Pax protein 23 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 RNA and DNA
  • ribozymes that inhibit human Pax protein 23 raRNA 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 and performs endonucleation.
  • Antisense RNA, DNA, and ribozymes can be obtained using any existing RNA or DNA synthesis technology, such as solid-phase phosphate amide chemical synthesis to synthesize oligonucleotides.
  • Antisense RNA molecules can be obtained by transcription of the D sequence encoding the RNA in vitro or in vivo.
  • This DNA sequence has been integrated downstream of the RNA polymerase promoter of the vector.
  • it can be modified in a variety of ways, such as increasing the sequence length on both sides, and the linkage between ribonucleosides using phosphate thioester or peptide bonds instead of phosphodiester bonds.
  • Polynucleotides encoding human Pax protein 23 are useful in the diagnosis of diseases related to human Pax protein 23.
  • the polynucleotide encoding human Pax protein 23 can be used to detect the expression of human Pax protein 23 or the abnormal expression of human Pax protein 23 in a disease state.
  • the DNA sequence encoding human Pax protein 23 can be used to hybridize biopsy specimens to determine the expression of human Pax protein 23.
  • Hybridization techniques include Sou thern blotting, Nor thern blotting, and in situ hybridization. These techniques and methods are publicly available and mature, and related kits are available commercially.
  • polynucleotides of the present invention can be used as probes to be fixed on a micro array (Mi croar ray) or a DNA chip (also known as a "gene chip") for analyzing differential expression analysis of genes and genetic diagnosis in tissues .
  • Human Pax protein 23 specific primers can also be used to detect human Pax protein 23 transcripts by RNA-polymerase chain reaction (RT-PCR) in vitro amplification.
  • Detection of mutations in the human Pax protein 23 gene can also be used to diagnose human Pax protein 23-related diseases.
  • Human Pax protein 23 mutations include point mutations, translocations, deletions, recombinations, and any other abnormalities compared to normal wild-type human Pax protein 23 DNA sequences. Mutations can be detected using existing techniques such as Sou thern blotting, DNA sequence analysis, PCR and in situ hybridization. In addition, mutations may affect protein expression. Therefore, the 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 of a human chromosome and can hybridize with it. Currently, specific sites for each gene on the chromosome need to be identified. Currently, only a few chromosome markers based on actual sequence data (repeat polymorphisms) are available for labeling chromosomal 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 from cDNA, which can locate the sequence on the chromosome On. These primers were then used for PCR screening of somatic hybrid cells containing individual human chromosomes. Only those hybrid cells that contain the human gene corresponding to the primer will produce amplified fragments.
  • PCR localization of somatic hybrid cells is a quick way to localize DNA to specific chromosomes.
  • oligonucleotide primers of the present invention by a similar method, 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 of the affected individuals and the mutation is not observed in any normal individual, the mutation may be the cause of the disease. Comparing affected and unaffected individuals usually involves first looking for structural changes in the chromosome, 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 that 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.
  • a kit or kit containing one or more containers containing one or more ingredients of the pharmaceutical composition of the present invention.
  • these containers there may be instructional instructions given by government agencies that manufacture, use, or sell pharmaceuticals or biological products, which reminders permit their administration on the human body by government agencies that manufacture, use, or sell them.
  • the polypeptide of the present 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 Pax protein 23 is administered in an amount effective to treat and / or prevent a specific indication.
  • the amount and dose range of human Pax protein 23 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 mRNA Isolat ion Kit (product of Qiegene). 2ug poly (A) mRNA forms cDM through reverse transcription.
  • the Smart cDNA cloning kit purchased from Clontech was used to insert the cDNA fragment into the multiple cloning site of the pBSK (+) vector (Clontech) to transform DH5 oc.
  • the bacteria formed a cDNA library.
  • Dye terminate cycle react ion sequencing kit Perkin-Elmer
  • ABI 377 automatic sequencer Perkin-Elmer
  • the cloned insert cDNA fragment was bidirectionally determined by synthesizing a series of primers.
  • CDNA was synthesized using fetal brain cell total R as a template and ol igo-dT as a primer for reverse transcription reaction. After purification with Qiagene's kit, the following primers were used for PCR amplification:
  • Pr imerl 5'- GCCGGTCGCAATGGAGCTTCCCCT-3 '(SEQ ID NO: 3)
  • Pr imer2 5'- CAACATGTCAGGTTTATTTCTCCT-3 '(SEQ ID NO: 4)
  • Pr imerl is a forward sequence located at the 5th end of SEQ ID NO: 1, starting at lbp;
  • Primer2 is the 3, terminal reverse sequence of SEQ ID NO: 1.
  • Conditions for the amplification reaction 50 mmol / L KC1, 10 mmol / L Tris-HCl pH 8.50, 1.5 ol / L MgCl 2 , 20 ( ⁇ mol / L dNTP, l Opmol Primer, 1U Taq DNA polymerase (Clontech). Reaction was performed on a PE9600 DNA thermal cycler (Perkin-Elmer) under the following conditions for 25 weeks. Period: 94 ° C 30sec; 55 ° C 30sec; 72 ° C 2min. During RT-PCR, ⁇ -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 using a TA cloning kit (Invitrogen).
  • the DNA sequence analysis results showed that the DNA sequence of the PCR product was exactly the same as the l-1677bp shown in SEQ ID NO: 1.
  • RNA With 20 ⁇ 8 RNA, electrophoresed on containing 20mM 3- (N- morpholino) propanesulfonic acid (pH7.0) 1.2% agarose gel -5raM -ImM EDTA-2.2M sodium acetate formaldehyde. It was then transferred to a nitrocellulose membrane. Preparation 32 P- DNA probe labeled with a- 32 P dATP by random priming method. The DNA probe used was the PCR amplified human Pax protein 23 coding region sequence (766bp to 1386bp) shown in FIG. 1.
  • a 32P-labeled probe (about 2 x 10 fi cpm / ral) was hybridized with a nitrocellulose membrane to which RNA was transferred at 42 ° C overnight in a solution containing 50% formamide-25mM H 2 P 0 4 (pH7.4)-5 x SSC-5 x Denhardt's solution and 200 g / ml salmon sperm DNA. After hybridization, the filters were placed 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 Pax protein 23
  • Primer3 5 —CCCCATATGATGGCAGCGGATGGGCAGCAGTTC-3, (Seq ID No: 5)
  • Primer4 5'-CCCGAATTCTCAGGCCTGCAGCCTCCAGACCTC-3 '(Seq ID No: 6)
  • the 5 'ends of these two primers contain Ndel and BamHI restriction sites, respectively, followed by the coding sequences of the 5' and 3, ends of the target gene, respectively.
  • the Ndel and BamHI restriction sites correspond to the expression vector plasmid pET-28b +) (Novagen, Cat. No. 69865.3).
  • the PCR reaction was performed using pBS-0295e09 plasmid containing the full-length target gene as a template.
  • the PCR reaction conditions were as follows: 10 pg of pBS-0295e09 plasmid, Primer-3 and Primer-4 were included in a total volume of 50 ⁇ 1; j was lpmol, Advantage polymerase Mix (Clontech) 1 ⁇ 1.
  • Cycle parameters 94 ° C 20s, 60 ° C 30s, 68 ° C 2 min, a total of 25 cycles.
  • Ndel 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 ligated product was transformed with colibacillus DH5a by the calcium chloride method. After the LB plates at a concentration of 3 ( ⁇ g / ral) were cultured overnight, positive clones were selected by colony PCR method and sequenced. A positive clone (pET-0295e09) with the correct sequence was selected, and the recombinant plasmid was transformed into E.
  • NH2-Met-Ala-Ala-Asp-Gly-Gln-Gln-Phe-Gly-Glu-I le-Lys-Ala-Ser-Ser-C00H (SEQ ID NO: 7).
  • the polypeptide is coupled to hemocyanin and bovine serum albumin to form a complex, respectively.
  • hemocyanin and bovine serum albumin For the method, see: Avrameas, et al. Immunochemi s try, 1969; 6:43. Rabbits were immunized with 4 mg of the hemocyanin-polypeptide complex plus complete Freund's adjuvant. After 15 days, the rabbit was immunized with hemocyanin polypeptide complex plus incomplete Freund's adjuvant once.
  • a titer plate coated with a 15 g / ml bovine serum albumin peptide complex was used as an ELISA to determine antibody titers in rabbit serum.
  • Protein A-Sepharose was used to isolate total IgG from antibody-positive rabbit serum.
  • the peptide was bound to a cyanogen bromide-activated Sepharose4B column, and anti-peptide antibodies were separated from the total IgG by affinity chromatography. Immunoprecipitation demonstrated that the purified antibody specifically binds to human Pax protein 23.
  • Example 6 Application of the polynucleotide fragment of the present invention as a hybridization probe
  • 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 It is determined whether it contains the polynucleotide sequence of the present invention and a homologous polynucleotide sequence is detected.
  • the probe can be used to detect the polynucleotide sequence of the present invention or its homologous polynucleotide sequence in normal tissue or pathology. Whether the expression in tissue cells 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 using a filter hybridization method.
  • Filter hybridization methods include dot blotting, Southern blotting, Northern blotting, and copying methods. They are all performed after immobilizing a polynucleotide sample to be tested on a filter. Hybridization was performed using essentially the same procedure.
  • the sample-immobilized filter is first pre-hybridized with a probe-free hybridization buffer, so that the non-specific binding site of the sample on the filter is saturated with the carrier and the synthetic polymer.
  • the pre-hybridization solution is then replaced with a hybridization buffer containing the labeled probe and incubated to hybridize the probe to the target nucleic acid.
  • the unhybridized probes are removed by a series of membrane washing steps.
  • This embodiment utilizes 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 from the polynucleotide SEQ ID NO: 1 of the present invention for use as hybridization probes should follow the following principles and several aspects to be considered:
  • the preferred range of probe size is 18-50 nucleotides
  • 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 The regions are compared for homology. If the homology with the non-target molecular region is greater than 85% or there are more than 15 consecutive bases, then the primary probe should not be used;
  • 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 (probe2), 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, so that it can be used in the following experimental steps
  • the film was 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 to 10 mg of prehybridization solution (lOxDenhardt's; 6xSSC, 0.1 lrag / ml CT DNA (calf thymus DNA)) was added. After closing the bag, 68. C. Water shake for 2 hours.
  • prehybridization solution lOxDenhardt's; 6xSSC, 0.1 lrag / ml CT DNA (calf thymus DNA)
  • probe 1 can be used to qualitatively and quantitatively analyze the presence and differential expression of the polynucleotide of the present invention in different tissues.
  • Gene microarrays or DNA microarrays are new technologies 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; search for and screen new tissue-specific genes, especially new genes related to diseases such as tumors; diagnosis of diseases such as hereditary diseases .
  • the specific method steps have been reported in the literature. For example, see DeRi si, JL, Lyer, V. & Brown, P. 0. (1997) Sceence 278, 680- 686. and Hel le, RA. , Schema, M., Chai, A., Sha lom, D., (1997) PNAS 94: 2150-2155.
  • 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 respectively amplified by PCR. After purification, the concentration of the amplified product was adjusted to about 500 ng / ul, and the samples were spotted on a glass medium with a Cartesian 7500 spotter (purchased from Cartesian Company, USA). The distance between the points is 280 ⁇ m. The spotted slides were hydrated, dried, and placed in a UV oven. Cross-link in the instrument and dry after elution to fix the DNA on a glass slide to prepare a chip. 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 the mRNA was purified with Ol igotex mRNA Midi Ki t (purchased from QiaGen), and another 1 J was separated by reverse transcription.
  • the fluorescent reagent Cy3dUTP (5-Amino-propargyl-2'-deoxyuridine 5'-tr iphate coupled to Cy3 f luorescent dye, purchased from Amersham Phamacia Biotech) was used to label the mRNA of human mixed tissue, and the fluorescent reagent Cy5dUTP (5-Amino- Propargy 2'-deoxyur idine 5'-triphate 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-Amino-propargyl-2'-deoxyuridine 5'-tr iphate coupled to Cy3 f luorescent dye, purchased from Amersham Phamacia Biotech
  • the probes from the two types of tissues were hybridized with the chip in a UniHyb TM Hybridization Solution (purchased from TeleChem) hybridization solution for 16 hours, and washed with a washing solution (1 SSC, 0.2% SDS) at room temperature. Scanning was then performed with a ScanArray 3000 scanner (purchased from Genera Scanning, USA), and the scanned images were analyzed and processed with Imagene software (Biodiscovery, USA) to calculate the Cy3 / Cy5 ratio of each point.
  • 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, L02 cell line stimulated by arsenic for 1 hour, L02 cell line stimulated by arsenic for 6 hours prostate, heart, lung cancer, fetal bladder, fetal small intestine, fetal large intestine, fetal thymus, fetal muscle, fetal liver, fetal kidney, fetal spleen, fetal brain, Fetal lung and fetal heart.

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Abstract

L'invention concerne un nouveau polypeptide, une protéine Pax humaine 23, et un polynucléotide codant pour ce polypeptide ainsi qu'un procédé d'obtention de ce polypeptide par des techniques recombinantes d'ADN. L'invention concerne en outre les applications de ce polypeptide dans le traitement de maladies, notamment des tumeurs malignes, de l'hémopathie, de l'infection par VIH, de maladies immunitaires et de diverses inflammations. L'invention concerne aussi l'antagoniste agissant contre le polypeptide et son action thérapeutique ainsi que les applications de ce polynucléotide codant pour la protéine Pax humaine 23.
PCT/CN2001/000646 2000-04-29 2001-04-28 Nouveau polypeptide, proteine pax humaine 23, et polynucleotide codant pour ce polypeptide WO2001083687A2 (fr)

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CN00115530A CN1321664A (zh) 2000-04-29 2000-04-29 一种新的多肽——人Pax蛋白23和编码这种多肽的多核苷酸

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002063008A2 (fr) * 2001-02-08 2002-08-15 Incyte Genomics, Inc. Molecules de signalisation intracellulaire

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998054344A2 (fr) * 1997-05-29 1998-12-03 Creative Biomolecules, Inc. Modulateurs de l'expression de morphogenes et procedes d'identification correspondants
WO1999063110A1 (fr) * 1998-05-30 1999-12-09 Imperial College Innovations Limited Diagnostic et traitement du cancer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998054344A2 (fr) * 1997-05-29 1998-12-03 Creative Biomolecules, Inc. Modulateurs de l'expression de morphogenes et procedes d'identification correspondants
WO1999063110A1 (fr) * 1998-05-30 1999-12-09 Imperial College Innovations Limited Diagnostic et traitement du cancer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002063008A2 (fr) * 2001-02-08 2002-08-15 Incyte Genomics, Inc. Molecules de signalisation intracellulaire
WO2002063008A3 (fr) * 2001-02-08 2003-07-10 Incyte Genomics Inc Molecules de signalisation intracellulaire

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