WO2002012319A1 - Nouveau polypeptide, pompe sodium-potassium humaine 14.85, et polynucleotide codant ce polypeptide - Google Patents
Nouveau polypeptide, pompe sodium-potassium humaine 14.85, et polynucleotide codant ce polypeptide Download PDFInfo
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- WO2002012319A1 WO2002012319A1 PCT/CN2001/000938 CN0100938W WO0212319A1 WO 2002012319 A1 WO2002012319 A1 WO 2002012319A1 CN 0100938 W CN0100938 W CN 0100938W WO 0212319 A1 WO0212319 A1 WO 0212319A1
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- polynucleotide
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- potassium pump
- human sodium
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- the present invention belongs to the field of biotechnology. Specifically, the present invention describes a novel polypeptide, a human sodium and potassium pump 14.85, and a polynucleotide sequence encoding the polypeptide. The invention also relates to a preparation method and application of the polynucleotide and polypeptide. Background technique
- Maintaining a stable ion concentration in the cell is critical to the cell's homeostasis and function.
- the difference between the high concentration of potassium and the low concentration of sodium is maintained by the sodium-potassium-ATPase.
- Sodium-potassium-ATPase is also called Alkaline-potassium pump. Its role is to remove sodium ions from the cell and remove potassium ions from the cell. Unbalanced ion distribution of high potassium in the membrane and high sodium in the membrane.
- Sodium-potassium pump is a special protein embedded in the lipid bilayer of the membrane. It not only has the function of transporting sodium ions and potassium ions, but also has the activity of ATPase. It can break down ATP to release energy, and Use this energy for active transport of sodium and potassium ions.
- Sodium and potassium pump activity can be regulated by hormones, second messengers, protein kinase A1 and protein kinase C.
- the sodium and potassium pump consists of two subunits. These two subunits are indispensable for the transport of sodium and potassium ions.
- the alpha subunit contains cation and ATP binding sites and is often referred to as the catalytic subunit.
- the ⁇ subunit is related to the structural stability of the pump. And affect the degree of sensitivity to potassium ions. [L B.C, Volume 272,
- the significance of the sodium potassium pump activity on the cell membrane is: 1.
- the intracellular high potassium ion caused by the sodium and potassium pump activity is a necessary condition for many metabolic reactions to take place, and is the basis for excitability of nerve and muscle tissues;
- Ecv304 cell line thymus normal fibroblasts 1024NC, Fibroblast, growth factor stimulation,
- Bladder cancer construct cell EJ bladder cancer, bladder cancer, liver cancer, liver cancer cell line, fetal skin, spleen, prostate cancer, jejunum adenocarcinoma, cardia cancer, expression profile of the polypeptide of the present invention and human sodium and potassium pump
- the expression profiles of the ⁇ subunits are very similar, so the functions of the two may be similar.
- the invention is named human sodium potassium pump
- the human sodium and potassium pump 14.85 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 to identify more involved in these Process of the human sodium-potassium pump 14.85 protein, especially the amino acid sequence of this protein is identified.
- the separation of the new human sodium and potassium pump 14.85 protein encoding gene also provides a basis for the study to determine the role of the protein in health and disease states. This protein may form the basis for the development of diagnostic and / or therapeutic drugs for disease 1 and it is therefore important to isolate its coding DNA. Disclosure of invention
- 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 comprising a polynucleotide encoding a human sodium-potassium pump 14.85.
- Another object of the invention is to provide a genetically engineered host cell containing a polynucleotide encoding a human sodium-potassium pump 14.85.
- Another object of the present invention is to provide a method for producing a human sodium-potassium pump 14.85.
- Another object of the present invention is to provide an antibody against the polypeptide of the present invention-human sodium potassium pump 14.85.
- Another object of the present invention is to provide mimic compounds, antagonists, agonists, and inhibitors directed to the polypeptide of the present invention-human sodium potassium pump 14.85.
- Another object of the present invention is to provide a method for diagnosing and treating diseases associated with abnormalities in human sodium and potassium pumps.
- 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:
- the sequence of the polynucleotide is one selected from the group consisting of: (a) a sequence having positions 242-649 in SEQ ID NO: 1; and (b) a sequence having 1-757 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 transformed, transduced or transfected host cells; and a culture cell The method for preparing a polypeptide of the present invention by describing a host cell and recovering an expressed product is described.
- 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 sodium and potassium pump 14.85 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 a human sodium-potassium pump 14.85 protein, comprising detecting a mutation in the polypeptide or a polynucleotide sequence encoding the same 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 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 sodium and potassium pump 14.85. ,
- 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” or “addition” refers to changes in the amino acid sequence or nucleotide sequence that result in The molecule is increased compared to one or more amino acids or nucleotides. “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 in appropriate animals or cells and to bind to specific antibodies.
- An "agonist” refers to a molecule that, when combined with human sodium and potassium pumps 14.85, 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 can bind human sodium potassium pump 14.85.
- Antagonist refers to a molecule that can block or regulate the biological or immunological activity of human sodium and potassium pump 14.85 when combined with human sodium and potassium pump 14.85.
- Antagonists and inhibitors can include proteins, nucleic acids, carbohydrates, or any other molecule that can bind human sodium and potassium pumps 14.85.
- Regular refers to a change in the function of human sodium potassium pump 14.85, including an increase or decrease in protein activity, a change in binding characteristics, and any other biological, functional, or immune properties of human sodium potassium pump 14.85 change.
- Substantially pure means substantially free of other proteins, lipids, carbohydrates or other substances with which it is naturally associated.
- Those skilled in the art can purify human sodium and potassium pumps using standard protein purification techniques 14.85.
- Substantially pure human sodium-potassium pump 14.85 produces a single main band on a non-reducing polyacrylamide gel.
- Human sodium potassium pump 14. 85 The purity of the peptide 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 (Sou the rn imprint or Nor thern blot, 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 conditions with reduced stringency allow non-specific binding, because conditions with reduced stringency require that the two sequences bind to each other as either specific or selective interactions.
- 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 (Lasergenes of tware package, DNASTAR, Inc., Mad is on Wis.). MEGAL I GN The 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). The C luster method will check the distance between all pairs by Each group of sequences is arranged into clusters. Then the clusters are allocated 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 residues of the match between sequence A and sequence B Number of bases X 100 The number of residues in sequence A-the number of spacer residues in sequence A-the number of spacer residues in sequence B can also be determined by Clus ter method or by methods known in the art such as Jotun He in Percent identity (He in J., (1990) Me thods in emzumo l ogy 183: 625-645) 0
- Similarity refers to the degree to which the amino acid residues at the corresponding position are identical or conservatively substituted when the alignment between amino acid sequences is aligned.
- Amino acids used for conservative substitutions 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 DM or RNA sequence.
- Antisense strand refers to a nucleic acid strand that is complementary to a “sense strand.”
- Derivative refers to a chemical modification of HFP or a nucleic acid encoding it. This chemical modification may be the replacement of a hydrogen atom with an alkyl, 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 sodium potassium pump 14.85.
- 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 a substance 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 certain vector, or such a polynucleotide or polypeptide may be part of a certain composition. Since the carrier or composition is not part of its natural environment, they are still isolated.
- isolated means that the substance is separated from its original environment (if it is natural Natural material, the original environment is the natural environment).
- natural Natural material 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 sodium-potassium pump 14. 85 means human sodium-potassium pump 14. 85 is substantially free of other proteins, lipids, sugars, or other substances naturally associated with it. Those skilled in the art can purify human sodium and potassium pumps using standard protein purification techniques 14.85. Substantially pure polypeptides can produce a single main band on a non-reducing polyacrylamide gel. Human sodium potassium pump 14. The purity of 85 peptides can be analyzed by amino acid sequence.
- the present invention provides a new polypeptide, a human sodium and potassium pump 14.85, which is basically composed 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 can be naturally purified products or chemically synthesized products, or can be produced from prokaryotic or eukaryotic hosts (eg, 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 the human sodium potassium pump 14.85.
- fragment refers to a polypeptide that substantially maintains the same biological function or activity of the human sodium-potassium pump 14.85 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 (II) such a type in which a group on one or more amino acid residues is substituted by 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 the leader sequence or secreted sequence or the sequence used to purify this polypeptide or protease sequence) As explained herein, 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 the nucleotide sequence of SEQ ID NO: 1.
- the polynucleotide of the present invention is found from a CDM library of human fetal brain tissue. It contains a full-length polynucleotide sequence of 757 bases, and its open reading frames 242-649 encode 135 amino acids.
- this peptide has a similar expression profile to the ⁇ -subunit of human sodium-potassium pump, and it can be inferred that the human sodium-potassium-pump 14.85 has similar functions to the ⁇ -subunit of human sodium-potassium pump.
- the polynucleotide of the present invention may be in the form of DNA or RM.
- DM forms include cDM, genomic DNA or synthetic DNA.
- DM can be single-stranded or double-stranded.
- DNA can be a coding strand Or non-coding chain.
- 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.
- polynucleotide encoding a polypeptide refers to a polynucleotide comprising the polypeptide and a polynucleotide comprising 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.
- 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 present invention also relates to a polynucleotide that hybridizes to the sequence described above (the two sequences have at least 5 and preferably 70% identity).
- 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 0.2 xSSC, 0.1% SDS, 60 ° C; or ( 2) Add a denaturant during hybridization, such as 50% (v / v) formamide, 0.1% calf serum / 0.1 »/ oF i co ll, 42 ° C, etc .; or (3) only between two Hybridization occurs only when the identity between the strip sequences is 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, most preferably at least 100 More than nucleotides.
- Nucleic acid fragments can also be used in nucleic acid amplification techniques (such as PCR) to identify and / or isolate polynucleotides encoding human sodium and potassium pump 14.85.
- genome 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 separation of cDM 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., Molecuar ar Clinging, A Labora tory Manua 1, Collspring Harbor Labora tory. New York, 1989).
- Commercially available cDNA libraries are also available, such as different cDM 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 DM-RNA hybridization; (2) the presence or absence of marker gene functions; (3) determination of the level of transcripts of human sodium and potassium pump 14.85; ( 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 here 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).
- the protein product expressed by the human sodium and potassium pump 14.85 gene can be detected by immunological techniques such as Western blotting, radioimmunoprecipitation, and enzyme-linked immunosorbent assay (ELISA).
- immunological techniques such as Western blotting, radioimmunoprecipitation, and enzyme-linked immunosorbent assay (ELISA).
- a method using DNA technology 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 for PCR may be appropriately based on the polynucleotide sequence information of the present invention disclosed herein.
- the amplified DNA / RM 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 etal. 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 must be repeated. Sometimes it is necessary to determine the cDNA sequence of multiple clones in order to splice into a full-length CDM sequence.
- the present invention also relates to a vector comprising a 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 sodium-potassium pump 14.85 coding sequence, and a method for producing a polypeptide of the present invention by recombinant technology.
- a polynucleotide sequence encoding the human sodium-potassium pump 14.85 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: Expression vectors based on ⁇ promoters (Rs eiierg, 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 sodium potassium pump 14.85 and appropriate transcriptional / translational regulatory elements. These methods include in vitro recombinant DNA technology, DNA synthesis technology, and in vivo recombination technology (Sambrsssk, et al. Mslecular Clsning, a Labsratsry Manual, csld Spring Harbsr Labsrat sry. New Ysrk, 1989).
- the DNA sequence can be operably linked to an appropriate promoter in an expression 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 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 3Q0 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, polytumor enhancers on the late side of the origin of replication, and adenoviral enhancers.
- the 7 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 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 sodium potassium pump 14.85 or a recombinant vector containing the polynucleotide The host cell can be transformed or transduced to constitute a genetically engineered host cell containing the polynucleotide or a recombinant vector.
- the term "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. Representative examples are: E.
- coli Streptomyces
- bacterial cells such as Salmonella typhimurium
- fungal cells such as yeast
- plant cells such as fly S2 or Sf 9
- animal cells such as CH0, COS, or Bowes s melanoma cells, etc. .
- Transformation of a host cell with a DM sequence according to the present invention or a recombinant vector containing the DNA sequence can be performed by 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 CaC l 2 method used in steps well known in the art. Alternatively, M g C l 2 is used.
- 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 liposome packaging.
- the polynucleotide sequence of the present invention can be used to express or produce recombinant human sodium and potassium pump 14. 85 (Scence, 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 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.
- recombinant proteins can be separated 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.
- 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
- FIG. 1 is a comparison diagram of gene chip expression profiles of the inventor's sodium potassium pump 14.85 and human sodium and potassium pump ⁇ subunits. Up The figure is a graph of the expression profile of the human sodium and potassium pump 14. 85, and the figure below is the graph of the expression profile of the beta subunit of the human sodium and potassium pump.
- 1-bladder mucosa 2-PMA + Ecv304 cell line, 3-LPS + Ecv304 cell line thymus, 4-normal fibroblasts 1024NC, 5-Fibroblas t, growth factor stimulation, 1024NT, 6- scar growth into fc Factor stimulation, 1013HT, 7-scar scar into fc without stimulation with growth factor, 1013HC, 8-bladder cancer construct cell EJ, 9-bladder cancer, 10-bladder cancer, 11-liver cancer, 12-liver cancer cell line, 13- Placenta, 14-spleen, 15-prostate cancer, 16-jejunum adenocarcinoma, 17 cardia cancer.
- Figure 2 shows the polyacrylamide gel electrophoresis (SDS-PAGE) of the separated human sodium and potassium pump 14.85. 15kDa is the molecular weight of the protein. The arrow indicates the isolated protein band. The best way to implement the invention
- the sequences at the 5 'and 3' ends of all clones were determined using a Dye terminate cycl reacting sequencing kit (Perkin-Elmer) and an ABI 377 automatic sequencer (Perkin-Blmer).
- the determined cDNA sequence was compared with the public DNA sequence database (Genebank), and it was found that the cDNA sequence of one of the clones 0636D06 was new DNA.
- the inserted cDNA fragments contained in this clone were determined in both directions by synthesizing a series of primers.
- the 0636D06 clone contained a full-length cDNA of 757bp (as shown in Seq ID NO: 1), and a 407bp open reading frame (0RF) from 242bp to 649bp, encoding a new protein (such as Seq ID NO : Shown in 2).
- This clone pBS-0636D06 and the encoded protein was named human sodium potassium pump 14.85.
- Example 2 Cloning of a gene encoding human sodium potassium pump 14.85 by RT-PCR
- CDNA was synthesized using fetal brain cell total RNA as a template and ol igo-dT as a primer for reverse transcription reaction. After purification using Qiagene's kit, the following primers were used for PCR amplification: Primerl: 5'- GGGAAATGGCTGTGCTCCCAACAT -3 '(SEQ ID NO: 3)
- Primer2 5'- AGTAACAGTGAGCTTTATTTTCAT -3 '(SEQ ID NO: 4)
- Primerl is a forward sequence starting at lbp of the 5th end of SEQ ID NO: 1;
- Primer2 is the 3 'end reverse sequence in SEQ ID NO: 1.
- Amplification conditions 50 mmol / L KC1, 10 mmol / L Tris- in a reaction volume of 50 ⁇ 1
- This method involves acid guanidinium thiocyanate phenol-chloroform extraction. That is, the tissue is homogenized with 4M guanidinium isothiocyanate-25mM sodium citrate, 0.2M sodium acetate (pH4.0), and 1 volume of phenol and 1/5 volume of chloroform-isoamyl alcohol (49: 1 ), Mix and centrifuge. Aspirate the aqueous layer, add isopropanol (0: 8 volume) and centrifuge the mixture to obtain RNA precipitate. The resulting RNA pellet was washed with 70% ethanol, dried and dissolved in water.
- RNA was electrophoresis was performed on a 1.2% agarose gel containing 20 mM 3- (N-morpholino) propanesulfonic acid (PH7.0)-5 mM sodium acetate-ImM EDTA-2.2M formaldehyde. It was then transferred to a nitrocellulose membrane.
- the DNA probe used was the 14.85 coding region sequence (242bp to 649bp) of the PCR amplified human sodium and potassium pump 14.85 shown in FIG.
- a 32P-labeled probe (about 2 x 10 6 cptn / ml) was hybridized with a nitrocellulose membrane to which RM 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 200 ⁇ g / ml salmon sperm DNA. After hybridization, the filter was washed in i 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 sodium-potassium pump 14.85
- Primer3 5'-CCCCATATGATGGGGTCTTGCCATATTTGCCAG-3 '(Seq ID No: 5)
- Primer4 5,-CCCGAATTCTCAACAGTCACCAATACATTGACT- 3, (Seq ID No: 6)
- the 5 'ends of these two primers contain Ndel and EcoRI digestion sites, respectively, and the 5' end of the target gene And the 3 'end coding sequence, the Ndel and EcoRI restriction sites correspond to the selective endonuclease sites on the expression vector plasmid pET- 2 8b (+) (Novagen, Cat. No. 69865.3).
- the pBS-0636D06 plasmid containing the full-length target gene was used as a template for the PCR reaction.
- the PCR reaction conditions are as follows: a total volume of 50 ⁇ 1 contains 10 pg of pBS-0636D06 plasmid, primers Primer-3 and Primer- 4 points separately! ] Is lOpmol, Advantage polymerase Mix (Clontecli) 1 ⁇ 1. Cycle parameters: 94 ° C 20s, 60 ° C 30s, 68 ° C 2 min, a total of 25 cycles. Ndel and EcoRI 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 coliform bacteria DH5 ⁇ by the calcium chloride method.
- a peptide synthesizer (product of PB) was used to synthesize the following peptides specific to human sodium and potassium pump 14.85:
- NH2-Met-Gly-Ser-Cys-His-Ile-Cys-Gln-Ala-Gly-Leu-Asn-Ser-Tyr-Asn-COOH 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 methods, see: Avrameas, et al. Immunochemistry, 1969; 6: 43. Rabbits were immunized with 4 mg of the hemocyanin peptide complex plus complete Freund's adjuvant, and 15 days later, the hemocyanin peptide complex plus incomplete Freund's adjuvant was used to boost immunity once.
- oligonucleotide fragments from the polynucleotides of the present invention for use as hybridization probes. Uses: if the probe can be used to hybridize to the genomic or cDNA library of normal tissue or pathological tissue from different sources to identify whether it contains the polynucleotide sequence of the present invention and detect a homologous polynucleotide sequence, it can be further used. The probe detects whether the polynucleotide sequence of the present invention or a homologous polynucleotide sequence thereof is abnormally expressed in cells of normal tissue or pathological tissue.
- 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 Acid sequence or a homologous polynucleotide sequence thereof.
- Filter hybridization methods include dot blotting, Sou thern imprinting, Northern blotting, and copying methods. They are all used to fix the polynucleotide sample to be tested on the filter and then hybridize using basically the same steps.
- 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 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
- the GC content is 30% -70%, and the non-specific hybridization increases when the GC content is exceeded;
- 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 unknown 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, 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): 5'-TGGGGTCTTGCCATATTTGCCAGGCTGGTTTGAACTCCTAC-3 '(SEQ ID NO: 8)
- Probe 2 which belongs to the second class of probes, is equivalent to the replacement mutant sequence of the gene fragment or its complementary fragment of SEQ ID NO: 1 (41M):
- PBS phosphate buffered saline
- step 8-13 are only used when contamination must be removed, otherwise step 14 can be performed directly.
- NC membrane nitrocellulose membrane
- Gene chip or gene microarray is a new technology that many national laboratories and large pharmaceutical companies are currently researching and developing. It refers to the orderly and high-density arrangement of a large number of target gene fragments on slopes. , Silicon and other carriers, and then use fluorescence detection and computer software to compare and analyze the data, in order to achieve the purpose of rapid, efficient, high-throughput analysis of biological information.
- the polynucleotide of the present invention can be used as Targeting DNA for gene chip technology for high-throughput research on new gene functions; finding and screening new tissue-specific genes, especially new genes related to diseases such as tumors; diagnosis of diseases such as hereditary diseases.
- 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 amplified product was adjusted to a concentration of about 500 ng / ul, and spotted on a glass medium using a Cartesian 7500 spotter (purchased from Cartesian, USA). The distance is 280 ⁇ . The spotted slides were hydrated, dried, and cross-linked in a purple diplomatic coupling instrument. After elution, the DNA was fixed on a glass slide to prepare a chip. The specific method steps have been reported in the literature in various ways. The post-spot processing steps of 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- Amino- propargy 1-2'- deoxyuridine 5'_triphate coupled to Cy3 fluorescent dye (purchased from Amersham Phamacia Biotech) was used to label the mRNA of human mixed tissue, and the fluorescent reagent Cy5dUTP (5-Amino-propargy l-2'-deoxyur idine 5'-triphate coupled to Cy5 fluorescent dye, purchased from Amersham Phamacia Biotech, labeled the body's specific tissue (or stimulated cell line) mRNA, and purified the probe to prepare a probe.
- Cy3dUTP 5- Amino- propargy 1-2'- deoxyuridine 5'_triphate coupled to Cy3 fluorescent dye (purchased from Amersham Phamacia Biotech) was used
- the probes from the above two tissues and the chip were respectively hybridized in a UniHyb TM Hybridization Solution (purchased from TeleCtiem) hybridization solution for 16 hours, and washed with a washing solution (lx SSC, 0.2 SDS) at room temperature. Scanning was performed with a ScanArray 3000 scanner (purchased from General 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 bladder mucosa, PMA + Ecv304 cell line, LPS + Ecv304 cell line thymus, normal fibroblasts 1024NC, Fibroblas t, growth factor stimulation, 1024NT, scar-like fc growth factor Stimulation, 1013HT, scar into fc without stimulation with growth factors, 1013HC, bladder cancer cell EJ, bladder cancer, bladder cancer, liver cancer, liver cancer cell line, fetal skin, spleen, prostate cancer, jejunum adenocarcinoma, cardia cancer. Draw a graph based on these 17 Cy3 / Cy5 ratios. (figure 1 ) . It can be seen from the figure that the expression profiles of the ⁇ subunits of the human sodium and potassium pump 14.85 and human sodium and potassium pump according to the present invention are very similar. Industrial applicability
- 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.
- Maintaining a stable ion concentration in a cell is critical to the cell's homeostasis and function.
- the difference between the high concentration of potassium ions and the low concentration of sodium ions is maintained by the sodium-potassium-ATPase.
- Sodium-potassium-ATPase also known as Alkaline-potassium pump, its role is to remove sodium ions from the cell outside the membrane by inverse concentration difference while consuming metabolic energy, while moving potassium ions from the cell into the membrane, thereby maintaining Unbalanced ion distribution of high potassium in the membrane and high sodium in the membrane.
- the sodium and potassium pump consists of two subunits. Both subunits are indispensable for the transport of sodium and potassium ions.
- Alpha subunits contain cation and ATP binding sites and are often referred to as catalytic subunits.
- the P subunit is related to the structural stability of the pump. It also affects the sensitivity to potassium ions.
- Human sodium and potassium pump ⁇ subunit is an important component of sodium-potassium-ATPase in the body, and its abnormal expression can affect the function of sodium-potassium-ATPase, causing excitability disorders of nerve cells and the corresponding tissues they control ( Dysfunction of skeletal muscle, smooth muscle, etc.), leading to the occurrence of related diseases.
- the expression profile of the polypeptide of the present invention is consistent with the expression profile of the human sodium and potassium pump ⁇ subunit protein, and both have similar biological functions.
- the polypeptide of the present invention is an important component of sodium-potassium-ATPase in the body, and its abnormal expression can affect the function of sodium-potassium-ATPase, cause excitability disorders of nerve cells and the corresponding tissues they control (skeletal muscle, smooth muscle) Etc.), which leads to the occurrence of neurological disorders, including but not limited to: Peripheral nervous system includes: 12 pairs of cerebral nerves, 31 pairs of spinal nerves, and autonomic nerves (sympathetic and parasympathetic). Its functional disorders can cause related diseases or / and clinical symptoms. These diseases or / and clinical symptoms include, but are not limited to:
- olfactory nerve Loss of olfactory taste (olfactory nerve), visual impairment and / or visual field defect (optic nerve), ophthalmoplegia, diplopia, changes in pupil size / reflexes (eye movement nerve, pulley nerve, abductor nerve), facial sensory disorders, masticatory muscles Paralysis, neuroparalytic keratitis (trigeminal nerve), facial paralysis (facial nerve), deafness, tinnitus, vertigo, balance disorders, nystagmus (auditory nerve), hoarseness, dysphagia, loss of pharyngeal reflex (glossopharyngeal nerve, vagus nerve), shoulder Sagging, turning neck / shrugs, fatigue (collateral nerve), paralysis of the tongue muscle (sublingual nerve), etc .; 2. Spinal nerve dysfunction:
- Paresthesia Inhibitory paresthesia (lack of sensation, hypoparesis), irritating paresthesia (allergy, paresthesia, pain), etc .;
- Dyskinesias Central paralysis (monoplegia, hemiplegia, paraplegia), peripheral paralysis, etc. 3. Autonomic (sympathetic and parasympathetic) functional disorders:
- Cardio-cerebral vascular system
- arrhythmia such as early atrial, early ventricular, sinus tachycardia, supraventricular tachycardia, ventricular tachycardia, atrial firing, atrial fibrillation, sinus bradycardia, sinus arrest,
- Sinus syndrome indoor conduction block, etc .
- CAD angina pectoris
- myocardial infarction cardiovascular neurosis
- acute heart failure chronic heart failure
- HBP chronic heart failure
- Pulmonary edema respiratory muscle paralysis, respiratory failure, bronchial asthma, etc .
- Gastrointestinal neurosis Hydatid disease, psychogenic vomiting, nervousness, anorexia nervosa, irritable bowel syndrome, etc .;
- Diabetes hypoglycemia, lipidemia, hyperlipoproteinemia, obesity, pheochromocytoma, etc .;
- dysmenorrhea dysmenorrhea, glaucoma, visual impairment and ischemic necrosis of multiple organs, such as renal necrosis (renal failure), liver necrosis, intestinal necrosis, etc .;
- the dysfunction of the sodium-potassium-ATPase will cause a large amount of extracellular sodium ions to enter the membrane, which in turn will cause too many water molecules to enter the membrane, which will cause the cells to swell and destroy the crusts of the cells.
- the polypeptide of the present invention is an important component of sodium-potassium-ATPase in the body, and its abnormal expression can affect the function of sodium-potassium-ATPase and cause edema of tissue cells. These diseases include but are not limited to:
- Cerebral edema headache, vomiting, coma
- pulmonary edema cough, sputum, dyspnea
- the polypeptide of the present invention and its antagonist, agonist and inhibitor can be directly used in a variety of diseases Treatments, such as disorders of the nervous system, edema of histiocytic cells, etc.
- the invention also provides methods for screening compounds to identify agents that increase (agonist) or inhibit (antagonist) human sodium and potassium pumps. Agonists enhance human sodium and potassium pumps. 14. 85 Stimulates biological functions such as cell proliferation, while antagonists prevent and treat disorders related to excessive cell proliferation, such as various cancers.
- mammalian cells or membrane formulations expressing human sodium-potassium pump 14.85 and labeled human sodium-potassium pump 14.85 can be cultured in the presence of drugs. The ability of the drug to increase or block this interaction is then determined.
- Antagonists of human sodium and potassium pump 14.85 include antibodies, compounds, receptor deletions, and the like that have been screened.
- the antagonist of human sodium potassium pump 14.85 can bind to human sodium potassium pump 14.85 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 sodium and potassium pump 14.85 can be added to the bioanalytical assay to determine whether the compound is an antagonist by measuring the effect of the compound on the interaction between human sodium and potassium pump 14.85 and its receptor.
- Receptor deletions and analogs that act as antagonists can be screened in the same manner as described above for screening compounds.
- Polypeptide molecules capable of binding to human sodium and potassium pump 14.85 can be obtained by screening a random peptide library composed of various possible combinations of amino acids bound to a solid phase. When screening, generally, 14.85 molecules of human sodium potassium pump should 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 the 14.85 epitope of the human sodium and potassium pump. 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 obtained by direct injection of human sodium and potassium pump 14.85 into immunized animals (such as rabbits, mice, rats, etc.).
- immunized animals such as rabbits, mice, rats, etc.
- adjuvants can be used to enhance the immune response, including but not limited to Freund's adjuvant .
- Techniques for preparing monoclonal antibodies against human sodium and potassium pump 14.85 include, but are not limited to, hybridoma technology (Kohler and Milstein. Nature, 1975, 256: 495-497), triple tumor technology, human beta-cell hybridoma technology, and EBV-hybridization. Tumor technology, etc.
- Chimeric antibodies that bind human constant regions and 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 (U.S. Pat No. 4946778) can also be used to produce single-chain antibodies against human sodium and potassium pump 14.85.
- Anti-human sodium potassium pump 14 Antibodies to S5 can be used in immunohistochemistry to detect human sodium potassium pump 14.85 in biopsy specimens.
- Monoclonal antibodies that bind to human sodium and potassium pump 14.85 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 potassium pump 14.85 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 the 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 sodium-potassium pump 14.85-positive cells.
- the antibodies of the invention can be used to treat or prevent diseases related to human sodium and potassium pump 14.85. Administration of appropriate doses of antibodies can stimulate or block the production or activity of human sodium and potassium pump 14.85.
- the invention also relates to a diagnostic test method for quantitative and localized detection of human sodium-potassium pump .85 levels. These tests are well known in the art and include FISH assays and radioimmunoassays. People tested in the test The level of sodium potassium pump 14.85 can be used to explain the importance of human sodium potassium pump 14.85 in various diseases and to diagnose diseases in which human sodium potassium pump 14.85 works.
- 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 analysis.
- the polynucleotide encoding human sodium potassium pump 14.85 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 sodium and potassium pump 14.85.
- Recombinant gene therapy vectors (such as viral vectors) can be designed to express variant human sodium and potassium pump 14.85 to inhibit endogenous human sodium and potassium pump 14.85 activity.
- a variant human sodium-potassium pump 14.85 may be a shortened human sodium-potassium pump 14.85 lacking a signaling domain, although it can bind to downstream substrates, but lacks signaling activity. Therefore, the recombinant gene therapy vector can be used to treat diseases caused by abnormal expression or activity of human potassium pump 14.85.
- 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 sodium-potassium pump 14.85 into cells.
- a recombinant polynucleotide encoding human sodium and potassium pump 14.85 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
- shuttle enzymes that inhibit human sodium and potassium pump 14.85 mRNA are also within the scope of the present invention.
- a ribozyme is an enzyme-like RNA molecule that specifically decomposes specific RNA. Its mechanism 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, which is widely used.
- Antisense RNA molecules can be obtained by in vitro or in vivo transcription of a DNA sequence encoding the RM.
- This DNA sequence is 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 phosphorothioate or peptide bond instead of the phosphodiester bond is used for the ribonucleoside linkage.
- the polynucleotide encoding human sodium potassium pump 14.85 can be used for the diagnosis of diseases related to human sodium potassium pump 14.85.
- the polynucleotide encoding human sodium and potassium pump 14.85 can be used to detect the expression of human sodium and potassium pump 14.85 or the abnormal expression of human sodium and potassium pump 14.85 in a disease state.
- the DNA sequence encoding human sodium and potassium pump 14.85 can be used to hybridize biopsy specimens to determine the expression of human sodium and potassium pump 14.85.
- Hybridization techniques include Southern blotting, Northern blotting, in situ hybridization, and the like. These technical methods are publicly available Commercially available techniques and related kits are available.
- a part or all of the polynucleotides of the present invention can be used as probes to be fixed on a micro array (Mi croarray ) or a DNA chip (also known as a "gene chip") for analyzing differential expression analysis and gene diagnosis of genes in tissues.
- Human sodium-potassium pump 14.85 specific primers can be used for RNA-polymerase chain reaction (RT-PCR) in vitro amplification to detect the human sodium-potassium pump 14.85 transcript.
- Detection of mutations in the human sodium and potassium pump 14.85 gene can also be used to diagnose human sodium and potassium pump 14.85-related diseases.
- Human sodium and potassium pump 14.85 mutations include point mutations, translocations, deletions, recombinations, and any other abnormalities compared to normal wild-type human sodium and potassium pump 14.85 DNA sequences. Mutations can be detected using well-known techniques such as Southern imprinting, DNA sequence analysis, PCR and in situ hybridization. In addition, mutations may affect the expression of proteins, so Northern blotting and Western blotting can be used to indirectly determine whether a gene is mutated.
- the sequences of the invention are also valuable for chromosome identification.
- the sequence specifically targets a specific position on a human chromosome and can hybridize to it.
- specific sites for each gene on the chromosome need to be identified.
- only a few chromosome markers based on actual sequence data are available for marking chromosome positions.
- an important first step is to locate these DNA sequences on a chromosome.
- the PCR primers (preferably 15-35bp) are prepared based on the cDNA, and the sequences can be located on the chromosomes. These primers were then used for PCR screening of somatic hybrid cells containing individual human chromosomes. Only those heterozygous cells containing 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 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 physical location of the sequence on the chromosome can be correlated with the genetic map data. These data can be found in, for example, V. Mckusick, Mendel ian Inheritance in Man (available online with Johns Hopkins University Welch Medical Library). Linkage analysis can then be used to determine the relationship between genes and diseases that are mapped to chromosomal regions.
- the differences in cDNA or genomic sequences between the affected and unaffected individuals need to be determined. If at A mutation is observed in some or all of the affected individuals, and the mutation is not observed in any normal individuals, then 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 using cDNA sequence-based PCR. According to the resolution capabilities of current physical mapping and gene mapping technology, the CDM that is accurately mapped to a disease-related chromosomal region 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 invention also provides a kit or kit containing one or more containers containing one or more ingredients of the pharmaceutical composition of the invention.
- a kit or kit containing one or more containers containing one or more ingredients of the pharmaceutical composition of the invention.
- these containers there may be instructional instructions given by government agencies that manufacture, use, or sell pharmaceuticals or biological products, which prompts permission for administration on the human body by government agencies that produce, use, or sell.
- 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 sodium and potassium pump 14. 85 Dosage in an amount effective to treat and / or prevent a specific indication.
- the amount and range of human sodium-potassium pump 14.85 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.
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Description
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Priority Applications (1)
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AU89530/01A AU8953001A (en) | 2000-06-12 | 2001-06-11 | A novel peptide---human na-k pump 14.85 and the polynucleotide coding this novelpeptide |
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CN00116429.5 | 2000-06-12 | ||
CN 00116429 CN1328024A (zh) | 2000-06-12 | 2000-06-12 | 一种新的多肽——人钠钾泵14.85和编码这种多肽的多核苷酸 |
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PCT/CN2001/000938 WO2002012319A1 (fr) | 2000-06-12 | 2001-06-11 | Nouveau polypeptide, pompe sodium-potassium humaine 14.85, et polynucleotide codant ce polypeptide |
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CN (1) | CN1328024A (zh) |
AU (1) | AU8953001A (zh) |
WO (1) | WO2002012319A1 (zh) |
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2000
- 2000-06-12 CN CN 00116429 patent/CN1328024A/zh active Pending
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2001
- 2001-06-11 WO PCT/CN2001/000938 patent/WO2002012319A1/zh active Application Filing
- 2001-06-11 AU AU89530/01A patent/AU8953001A/en not_active Abandoned
Non-Patent Citations (2)
Title |
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DATABASE GENBANK [online] 1 May 1992 (1992-05-01), QUENTIN Y. ET AL., retrieved from GI:113667 accession no. NCBI Database accession no. P23960 * |
DATABASE GENBANK [online] 21 January 2000 (2000-01-21), KAUL R.K. ET AL., retrieved from GI:6729063 accession no. NCBI Database accession no. AC018633.2 * |
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