WO2002052009A1 - Mutant de la proteine fgf23 humaine reduisant le taux de phosphore dans le sang - Google Patents
Mutant de la proteine fgf23 humaine reduisant le taux de phosphore dans le sang Download PDFInfo
- Publication number
- WO2002052009A1 WO2002052009A1 PCT/JP2001/011482 JP0111482W WO02052009A1 WO 2002052009 A1 WO2002052009 A1 WO 2002052009A1 JP 0111482 W JP0111482 W JP 0111482W WO 02052009 A1 WO02052009 A1 WO 02052009A1
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- WIPO (PCT)
- Prior art keywords
- mutant
- amino acid
- arginine
- dna
- fgf23
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K48/00—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
Definitions
- the present invention relates to an FGF23 protein mutant that lowers the phosphorus concentration in blood, and a use of the mutant.
- FGF23 is a gene cloned by Ito et al. Of Kyoto University and has been confirmed to be expressed in the brain (Yamashita T. et al. (2000) Biochem. Biophys. Res. Commun. 277: 494- 498, WO 01/66596). Further, LU ETHY et al. Cloned the FGF23 gene, created a transgenic mouse expressing the gene, and analyzed the phenotype of the mouse (WO 01/61007).
- the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a mutant of FGF23 protein that reduces blood phosphorus concentration, a DNA encoding the mutant, and uses thereof. It is in.
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and have attempted to produce a mutant of the FGF23 protein, which is expected to reduce blood phosphorus concentration.
- the full-length cDNA of the human FGF23 gene was isolated, and then MA encoding the mutant was synthesized by PCR, and cloned into an expression vector.
- the expression vector was introduced into a mouse by an intravenous administration method, the mutant was expressed in the mouse, and the blood phosphorus concentration in the mouse was measured thereafter. As a result, they found that the expression of the FGF23 mutant significantly reduced the phosphorus concentration in mouse blood.
- the present inventors succeeded in producing an FGF23 protein mutant and succeeded in reducing the concentration of phosphorus in mouse blood using the mutant, thereby contributing to the present invention. It was completed. Since the FGF23 protein mutant of the present invention has such a capability of lowering the phosphorus concentration in blood, it is expected to be a drug for the treatment of hyperphosphatemia.
- the present invention relates to an FGF23 protein mutant that reduces blood phosphorus concentration, DNA encoding the mutant, and uses thereof, and more specifically,
- amino acid sequence at position 176 is arginine
- the arginine at position 179 is glutamine
- the amino acid sequence at position 179 is mutated to tributofan.
- the arginine at position 1-6 is glutamine
- the arginine at position 179 is glutamine
- the arginine at position 179 is mutated to tryptophan.
- [3] A vector into which the DNA of [1] or [2] has been inserted.
- [4] A transformed cell carrying the DNA of [1] or [2], or the vector of [3].
- ' [5] In the amino acid sequence of SEQ ID NO: 2, the amino acid sequence at position 176 of arginine is glutamine, the position of arginine at position 179 is glutamine, or the sequence of amino acid at position 179 is arginine mutated to tributofan. protein.
- the arginine at position 176 is glutamine
- the arginine at position 179 is glutamine
- the amino acid sequence at position 179 is mutated to tributophan.
- the present invention provides a DNA encoding an FGF23 protein variant that reduces blood phosphorus levels.
- the mutant encoded by the DNA of the present invention includes a mutant in which the arginine residue at position 176 in the amino acid sequence of the human FGF23 protein represented by SEQ ID NO: 2 has been substituted with glutamine, Variant in which the arginine residue at position is substituted with gluminine, and a variant in which arginine at position 179 is substituted with tryptophan (hereinafter referred to as “R176Q variant”, “R179Q variant” and “R179W variant, respectively” , And these are collectively referred to as “FGF variants”).
- preferred variants are the R176Q variant and the R179Q variant, and the most preferred variant is the M79Q variant.
- the present invention also provides fragments of these FGF variants. Preferred fragments are those that comprise at least the amino acid sequence of positions 1 to 190 in the FGF variant.
- the FGF23 mutant of the present invention has a function of reducing blood phosphorus concentration. Therefore, FGF23 mutants are expected to have therapeutic and preventive effects against diseases caused by the presence of high concentrations of phosphorus in the blood. In a preferred embodiment of the FGF23 variant, it does not affect blood calcium levels.
- Hyperphosphatemia generally to onset as a result of a reduction in the P0 4 excretion from kidney. Advanced renal failure (GFR is less than 20Ramuda / min) results in a decrease in excretion sufficient to guide the elevation of plasma P0 4. Even without renal failure, in the case of PSEUDOHYPOPARATHYROIDISM and hypoparathyroidism is sometimes failure occurs P0 4 excretion of kidney. Hyperphosphatemia may also occur overdose or oral P0 4, sometimes from overuse of an enema containing phosphate. Hyperphosphatemia also sometimes result from movement of the extracellular intracellular P0 4.
- Hyperphosphatemia also plays a critical role in secondary hyperparathyroidism and the development of renal osteodystrophy in patients on long-term dialysis.
- the DNA of the present invention is used not only for the production of the mutant of the present invention described below in vivo or in vivo but also for application to gene therapy for diseases caused by high blood phosphorus concentration, for example.
- Can be The DNA of the present invention may be in any form as long as it can encode the mutant of the present invention. That is, it does not matter whether it is cMA synthesized from mA, genomic DNA, or chemically synthesized DNA.
- DNAs having any nucleotide sequence based on the degeneracy of the genetic code are included as long as they can encode the mutant of the present invention.
- the DNA of the present invention can be prepared by modifying human FGF23 cDNA.
- Human FG F23 cDNA can be prepared by a method known to those skilled in the art. For example, it can be prepared by preparing a cDNA library from cells expressing FGF23, and performing hybridization using a part of the sequence of FGF23 cDNA (SEQ ID NO: 1) as a probe.
- the cDNA library may be prepared, for example, by the method described in the literature (Sambrook, J. et al., Molecular Cloning, Cold Spring Harbor Laboratory Press (1989)), or using a commercially available DNA library. Is also good.
- oligo DNA is synthesized based on the FGF23 cDNA sequence (SEQ ID NO: 1), and this is used as a primer. It can also be prepared by performing a PCR reaction and amplifying a cDNA encoding the polypeptide of the present invention.
- mRNA is isolated from cells, tissues and organs that express FGF23.
- mRNA can be isolated by known methods, for example, guanidine ultracentrifugation (Chirgwin, J. M. et al., Biochemistry (1979) 18, 5294-5299), and the AGPC method.
- mA from total RNA using mRNA Purification Kit (Pharmacia). Purify. Alternatively, mMA can be directly prepared by using QuickPrep mRNA Purification Kit (Pharmacia).
- CDNA is synthesized from the obtained mRNA using reverse transcriptase. cDNA synthesis, AMV
- Reverse Transcriptase First-strand cDNA Synthesis Kit (Shii-Dagaku Kogyo) can be used.
- a primer prepared based on the sequence shown in SEQ ID NO: 1 a 5-Ampli FINDER RACE Kit (manufactured by Clontech) and a polymerase chain reaction (PCR) were used.
- PCR polymerase chain reaction
- a target DNA fragment is prepared from the obtained PCR product and ligated to a vector DNA. Further, a recombinant vector is prepared from this, introduced into E. coli, etc., and colonies are selected to prepare a desired recombinant vector.
- the base sequence of the target DNA can be confirmed by a known method, for example, a dideoxynucleotide chain-one-minute method.
- human FGF23 cDNA can be obtained by the method described in Example 1.
- the modification of the human FGF23 cDNA to produce the FGF23 mutant of the present invention can be performed by a DNA mutation (DNA Mutagenesis) technique generally performed by those skilled in the art. Specifically, for example, it can be performed by the method described in the second embodiment.
- DNA Mutagenesis DNA Mutagenesis
- the present invention also provides a mutant encoded by the DNA of the present invention.
- the mutant of the present invention may differ in amino acid sequence, molecular weight, isoelectric point, presence / absence and form of sugar chains, etc., depending on the cell, host or purification method that produces it, as described below. However, as long as the obtained mutant has the ability to reduce the phosphorus concentration in blood, it is included in the present invention.
- a prokaryotic cell for example, Escherichia coli
- a methionine residue is added to the N-terminal of the amino acid sequence of the original mutant, and such a mutant is also included in the present invention. It is.
- the mutant of the present invention can be prepared as a recombinant polypeptide by a method known to those skilled in the art.
- MA encoding the mutant of the present invention is inserted into an appropriate expression vector, and the resulting transformant is introduced into an appropriate host cell.
- Chromatography such as ion exchange, reverse phase, gel filtration, or affinity chromatography in which an antibody against the mutant of the present invention is immobilized on a column, or a combination of a plurality of these columns. It can be purified and prepared.
- the mutant of the present invention may be used as a fusion polypeptide with glutathione S-transferase protein or as a recombinant polypeptide to which a plurality of histidines are added in host cells (eg, animal cells and E. coli).
- host cells eg, animal cells and E. coli.
- the expressed recombinant polypeptide can be purified using a glutathione column or a nickel column. After purification of the fusion polypeptide, if necessary, a region other than the mutant of interest in the fusion polypeptide can be cleaved with thrombin or Factor-I Xa and removed.
- the present invention also provides a vector into which the DNA of the present invention has been inserted.
- the vector of the present invention is useful for retaining the DNA of the present invention in a host cell or expressing the mutant of the present invention.
- the vector when using Escherichia coli as a host, the vector is amplified in Escherichia coli (E. coli, for example, JM109, DH5, XL1 ⁇ XLlBlue), etc. Especially if it has an "ori" to be transformed and further has a transformed E. coli selection gene (for example, a drug (a drug resistance gene that can be identified by ampicillin, tetracycline, kanamycin, chloramphenicol))
- E. coli selection gene for example, a drug (a drug resistance gene that can be identified by ampicillin, tetracycline, kanamycin, chloramphenicol)
- vectors include M13-based vectors, pUC-based vectors, pBR322, pBluescript pCR-Script, etc.
- Examples include pGEM-Ts pDIRECT, pT7, etc.
- a vector is used for producing the mutant of the present invention, special For example, in the case of expression in Escherichia coli, in addition to having the above-mentioned characteristics such that the vector is amplified in Escherichia coli, a host such as JM109 or DH5 can be used.
- Such vectors include pGEX-5X-1 (Pharmacia), QIAexpress systemj (Qiagen), pEGFP, or PET (in this case, the host is T7 RNA polymerase) in addition to the vector described above.
- BL21, which expresses) is preferred.
- the vector may include a signal sequence for polypeptide secretion.
- a signal sequence for polypeptide secretion the pelB signal sequence (Lei, SP. Et al J. Bacteriol. (1987) 169, 4379) may be used when produced in periplasm of Escherichia coli.
- the introduction of the vector into a host cell can be carried out, for example, by using a calcium chloride method or an electroporation method.
- vectors for producing the mutant of the present invention include mammalian expression vectors (for example, pcDNA3 (manufactured by Invitrogen) and pEG F-BOS (Nucleic Acids. Res. 1990, 18 (17), p5322), pEF ⁇ CDM8), insect cell-derived expression factor (e.g., ⁇ Bac-to-BAC baculovairus expression systemj
- plant-derived expression vectors eg, ⁇ 1, pMH2
- animal virus-derived expression vectors eg, pHSV, pMV, pAdexLcw
- retrovirus-derived expression vectors eg, , PZIPneo
- yeast-derived expression vectors eg, “Pichia Expression Kit” (manufactured by Invitrogen), pNVll, SP-Q01
- Bacillus subtilis-derived expression vectors eg, pPL608, pKTH50.
- a promoter necessary for expression in cells for example, SV40 promoter (Muligan et al., Nature (1979) 277, 108) MMLV-LTR Promoter Yuichi, EFlo: Promo — Yuichi (Mizushima et al., Nucleic Acids Res. (1990) 18, 5322), it is essential to have a CMV promoter, etc. It is more preferable to have a gene for selection of conversion (for example, a drug resistance gene that can be identified by a drug (neomycin, G418, etc.)).
- a vector with such characteristics Is then, for example, p negation, pDR2, etc. pB -RSV pBK-CMV s pOPRSV, pOP13 , and the like.
- a vector having a DHFR gene complementing the nucleic acid synthesis pathway-deficient CH0 cell. Eg, pCHOI
- MTX methotrexate
- a gene expressing the SV40 T antigen is An example is a method in which COS cells on the chromosome are used to transform with a vector (such as pcD) having an SV40 origin of replication.
- a vector such as pcD
- the replication origin those derived from poliovirus, adenovirus, sipapirovirus (BPV) and the like can also be used.
- the expression vector is selected as a selection marker for amplification of the gene copy number in the host cell system, aminoglycoside transferase (APH) gene, thymidine kinase (TK) gene, Escherichia coli xanthinguanine phosphoribosyltransferase (Ecogp t) gene. And the dihydrofolate reductase (dhfr) gene.
- APH aminoglycoside transferase
- TK thymidine kinase
- dhfr dihydrofolate reductase
- the DNA of the present invention is incorporated into an appropriate vector, and the DNA is produced by, for example, the retrovirus method, ribosome method, cationic ribosome method, adenovirus method, or the like.
- the vector used include, but are not limited to, an adenovirus vector (for example, pAdexlcw) and a retrovirus vector (for example, pZIPneo).
- General genetic manipulations such as insertion of the DNA of the present invention into a vector can be performed according to a conventional method (Molecular Cloning, 5.61-5.63).
- Administration into a living body may be performed by the ex J> O method or the in Wra method.
- the present invention also provides a host cell into which the vector of the present invention has been introduced.
- the host cell into which the vector of the present invention is introduced is not particularly limited. Various animal cells can be used.
- the host cell of the present invention can be used, for example, as a production system for producing or expressing the mutant of the present invention. Production systems for the manufacture of the onset bright variants, the production systems of c in Wira which there are the production systems in iro and in vivo, production systems that use and the production system prokaryotic cells using eukaryotic cells Is mentioned.
- animal cells for example, animal cells, plant cells, and fungal cells can be used as hosts.
- animal cells mammalian cells, for example, CHO (J. Exp. Med. (1995) 108, 945), C0S, 3T3, myeloma, BHK (baby hamster kidney), HeLa, Vero amphibian cells, for example, African Megafrog Oocytes (Valle, et al . : Nature (1981) 291, 358-340) or insect cells such as Sf9, Sf21 and Tn5 are known.
- Examples of the CH0 cells include dhfr-CHO (Proc. Natl. Acad. Sci.
- the vector can be introduced into a host cell by, for example, a calcium phosphate method, a DEAE dextran method, a method using Cationic Ribosome D0TAP (manufactured by Behringer Mannheim), an electro-boration method, or a lipofection method. Is possible.
- Nicotiana tabacum icotiana tabacum
- a polypeptide production system which may be callus cultured.
- Fungal cells include yeast, for example, Saccharomyces genus, such as Saccharomyces cerevisiae, filamentous fungi, such as Aspergillus, such as Aspergillus, for example, Aspergillus
- ⁇ Aspergillus niger is known.
- prokaryotic cells there are production systems using bacterial cells.
- bacterial cells include Escherichia coli (. Coli), for example, JM109, DH5, HB101, and the like, and Bacillus subtilis.
- the polypeptide is obtained by transforming these cells with the desired DNA and culturing the transformed cells in vitro.
- Culture can be performed according to a known method. For example, as a culture solution of animal cells, for example, DMEM, MEM, RPMI 160 IMDM can be used. At that time, a serum replacement solution such as fetal calf serum (FCS) can be used together, or serum-free culture may be performed.
- FCS fetal calf serum
- the pH during the culturing is preferably about 6-8. Culture is usually performed at about 30 to 40 ° C for about 15 to 200 hours, and the medium is replaced, aerated, and agitated as necessary.
- examples of a system for producing a polypeptide in in F include a production system using animals and a production system using plants.
- a DNA encoding the mutant of the present invention is introduced into these animals or plants, and the mutant is produced in the animal or plant and collected.
- the term "host" in the present invention includes a production system using mammals and insects when using c animals including these animals and plants. As mammals, goats, bushes, ovines, mice and mice can be used (Vicki Glaser, SPECTRUM Biotechnology Applications, 1993). When a mammal is used, a transgenic animal can be used.
- DNA encoding the mutant of the present invention is prepared as a fusion gene with a gene encoding a polypeptide uniquely produced in milk, such as goat casein.
- the DNA fragment containing the fusion gene is injected into a goat embryo, and the embryo is transplanted into a female goat.
- the mutant of the present invention can be obtained from milk produced by a transgenic goat born from a goat that has received an embryo or a descendant thereof.
- Hormones may optionally be used in transgenic goats to increase the amount of milk containing polypeptides produced by transgenic goats (Ebert, KM et a 1., Bio / Technology (1994) 12, 699). -702).
- silkworms can be used as insects, for example.
- the mutant in the case of using a silkworm, can be obtained from the body fluid of the silkworm by infecting the silkworm with a baculovirus into which the DNA encoding the mutant of the present invention has been inserted (Sus picture, M. et al. 5 Nature (1985) 315, 592-594).
- tobacco when using a plant, for example, tobacco can be used.
- the DNA encoding the mutant of the present invention is introduced into a vector for plant expression, for example, pM0N530, and the vector is introduced into a bacterium such as Agrobacterium tumefaciens. I do.
- This bacterium is infected to tobacco, for example, Nicotiana tabacum, and the mutant of the present invention can be obtained from the leaves of this tobacco (Julian K. -C. Ma et al., Eur. J. Immunol. (1994) 24, 131-138).
- the thus obtained mutant of the present invention can be isolated from the inside or outside of a host cell (such as a medium) and purified as a substantially pure and uniform polypeptide.
- the separation and purification of the polypeptide may be carried out by any of the separation and purification methods used in ordinary polypeptide purification, and is not limited at all. For example, chromatographic column, filtration, ultrafiltration, salting out, solvent precipitation, solvent extraction, distillation, immunoprecipitation, SDS-polyacrylamide gel electrophoresis, isoelectric focusing, dialysis, recrystallization, etc.
- the polypeptides can be separated and purified by appropriate selection and combination.
- chromatography include affinity chromatography, ion-exchange chromatography, hydrophobic chromatography, gel filtration, and reverse-phase chromatography.
- Oral chromatography, adsorption chromatography, and the like (Strategies for Protein Purification and Characterization: A Laboratory Course Manual-Ed Daniel R. Marshak et al., Cold Spring Harbor Laboratory Press, 1996).
- These chromatographys can be performed using liquid phase chromatography, for example, liquid phase chromatography such as HPLC and FPLC.
- the present invention also encompasses highly purified variants using these purification methods.
- the mutant of the present invention can be arbitrarily modified or partially removed by reacting the mutant with an appropriate protein modifying enzyme before or after purification.
- protein modifying enzyme include trypsin. Chymotrypsin, lysyl endopeptidase, protein kinase, glucosidase and the like are used.
- the present invention also provides a pharmaceutical composition for lowering blood phosphorus concentration, comprising a mutant of the present invention, DNA encoding the mutant, or a vector into which the DNA has been inserted.
- the mutant of the present invention is used as a medicament for humans and other animals, for example, mice, rats, guinea pigs, rabbits, egrets, chickens, cats, dogs, sheep, bush dogs, monkeys, monkeys, baboons and chimpanzees
- mice rats, guinea pigs, rabbits, egrets, chickens, cats, dogs, sheep, bush dogs, monkeys, monkeys, baboons and chimpanzees
- administration in addition to directly administering the mutant itself to a patient, it is also possible to perform administration as a pharmaceutical composition formulated by a known pharmaceutical method.
- pharmacologically acceptable carriers or vehicles specifically, sterile water or saline, vegetable oils, emulsifiers, suspending agents, surfactants, stabilizers, flavoring agents, excipients, vehicles, preservatives It is possible to formulate a formulation by appropriately combining it with a drug, a binder and the like, and mixing it in a unit dosage form required for generally accepted pharmaceutical practice.
- the amount of the active ingredient in these preparations is such that an appropriate dose in the specified range can be obtained.
- Additives that can be incorporated into tablets and capsules include, for example, binders such as gelatin, corn starch, tragacanth gum, acacia, excipients such as crystalline cellulose, corn starch, gelatin, and alginic acid. Swelling agents, lubricants such as magnesium stearate, sweeteners such as sucrose, lactose or saccharin, and flavoring agents such as peppermint, cocoa oil or tea are used. In addition to the above materials, a liquid like oil and fat A carrier can be included. Sterile compositions for injection can be formulated according to normal pharmaceutical practice using a vehicle such as distilled water for injection.
- Aqueous injection solutions include, for example, saline, isotonic solutions containing glucose and other adjuvants, such as D-sorbitol, D-mannose, D-mannitol, sodium chloride, and suitable solubilizing agents.
- suitable solubilizing agents such as alcohols, specifically ethanol, polyalcohols such as propylene glycol, polyethylene glycol, nonionic surfactants such as polysorbate one DOO 80 TM, as good c oily liquid be used in combination with HC0-50 Sesame oil and soybean oil may be mentioned, and may be used in combination with benzyl benzoate or benzyl alcohol as a solubilizing agent.
- a buffer for example, a phosphate buffer, a sodium acetate buffer, a soothing agent, for example, proforce hydrochloride, a stabilizer, for example, benzyl alcohol, phenol, or an antioxidant.
- a buffer for example, a phosphate buffer, a sodium acetate buffer
- a soothing agent for example, proforce hydrochloride
- a stabilizer for example, benzyl alcohol, phenol, or an antioxidant.
- the prepared injection solution is usually filled into an appropriate ampoule.
- Administration to patients can be performed, for example, by intraarterial injection, intravenous injection, subcutaneous injection, etc., or intranasally, transbronchially, intramuscularly, transdermally, or orally by a method known to those skilled in the art. It can do better.
- the dose varies depending on the weight and age of the patient, the administration method, and the like, but those skilled in the art can appropriately select an appropriate dose.
- the dosage of the mutant of the present invention may vary depending on the administration target, the target organ, the symptoms and the administration method.
- the usual dosage for an adult is 1 day. It is considered to be about 100 zg to 20 mg per.
- the single dose varies depending on the subject of administration, target organ, symptoms and administration method.
- injection usually in adults (with a body weight of 60 kg)
- the dose can be administered in terms of the amount converted per 60 kg body weight or the amount converted per body surface area.
- the DNA of the present invention is incorporated into a vector that guarantees its expression in a living body, for example, a retrovirus method, a ribosome method, and a cationic ribosome. It may be introduced into a living body by a method such as the adenovirus method. This makes it possible to carry out gene therapy for diseases caused by high blood phosphorus levels. For in vivo administration, the vivo method or the invi method can be used. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a graph showing the effect of the FG23 mutant on the concentration of inorganic phosphorus in serum. Inorganic phosphorus in serum was measured for 4 days after introduction of the DNA vector. The overnight shows the average soil SEM. The numbers in the columns represent the number of animals. * P ⁇ 0.05 vs. MOCK control (unpaired t-test).
- FIG. 2 is a graph showing the effect of FGF23 on the concentration of inorganic phosphorus in serum. Inorganic phosphorus in the serum was measured for 4 days after the introduction of the DNA vector. The night shows SEM. The numbers in the columns represent the number of animals. * P ⁇ 0.05 vs. MOCK control (unpaired t-test).
- FIG. 5 is a photograph showing the result of SDS-PAGE analysis (CBB staining) of FGF-23 (mutant) M2-F.
- M in the figure represents a molecular weight marker (BIO0-RAD, broad range).
- FIG. 6 is a graph showing the serum phosphorus concentration lowering effect of the C2 terminal-deleted M2FGF23 mutant.
- M0CK represents a mouse into which the parent vector pCAGGS has been introduced.
- Normal indicates a normal mouse.
- FIG. 1 is a graph showing the effect of PTH (1-34) and M2FGF23 on lowering serum phosphorus in TPTX rats.
- FIG. 8 is a graph showing the effects of PTH (group 34) and M2FGF23 on TPTX rat serum calcium.
- FIG. 9 is a graph showing the effects of PTH (1-34) and M2FGF23 on renal phosphorus excretion in TPTX rats.
- PCR reaction 0.25 zl QIAGEN Taq DNA polymerase, 5.01 5x Q-solution, 0.5 ⁇ 1 Specific Forward PCR primer (50 ⁇ M, SEQ ID NO: 3), 0.5 ⁇ 1 Specific Reverse A PCR reaction was carried out using a thermal cycler ABI2400 under the following conditions with the addition of PCR primer (50 M, SEQ ID NO: 4) and 15-1 DDW to make a total amount of 25/1. Primary denaturation was performed at 95 ° C for 2 minutes, followed by 35 cycles of a 2-step shuttle PCR (40 seconds at 94 ° C, 1 minute at 60 ° C), and a final extension reaction at 72 ° C for 7 minutes. The PCR reaction was terminated.
- T0P0 TA Cloning Kit (Invitorogen Cat. No. 45000-01)
- Subcloning into the TA vector pCR2.1 was performed using the PCR reaction solution of 2 ⁇ 1. The operation was performed according to the protocol attached to the kit.
- the nucleotide sequence analysis of TA cloned clone # 3 was analyzed using M13 M4 primer (TaKaRa Cat. No. 3832A), M13 RV primer (TaKaRa Cat. No. 3830A), and the primer described in SEQ ID NO: 5.
- FGF-23 mutants R176Q (Ml), R179Q (M2), R179W (M3), R176Q + R179Q (M4), and R176Q + R179 (M5) were prepared using human FGF-23 as type II. According to the literature (Autosomal dominant hypophosphataemic rickets is associated with mutat ions in FGF23 Nature Genetics Vol. 26 p345-348.November 2000) from human 23.527G A (R176Q), 536G A (R179Q) ⁇ 535C ⁇ T (R179W) Types and their combinations M4 (R176Q + R179Q) and M5 (R176Q + R179W) were produced. Primer One synthesis was outsourced to a technology company. The nucleotide sequences of the primers used are as follows.
- Mutagenesis generates partial fragments for mutagenesis in the 1st PCR, generates a type II full-length mutant containing the mutation by the 2nd PCR, and finally completes the mutation by the 3rd PCR This was done in a three-step process of getting a body. That is, 0.2 ⁇ 1 human FGF-23 clone # 3 (40 ng / ⁇ l), 5/1 TaKaR A EX lOxPCR buffer, dNTP mix (50 zM) ⁇ 0.51 TaKaRa EX Taq
- a 2nd PCR reaction (to produce the full-length mutant type II) was performed.
- 0.1 / 1 human FGF-23 clone # 3 (40 ng /// l)
- 2.5 ⁇ 1 TaKaRa EX lOxPCR buffer (40 ng /// l)
- 2 i1 dNTP mix (50 / M) 0.25 zl TaKaRa EX Taq DNA polymerase, as early as 1 8.
- 15 l of DDW was added to make a total volume of 24 l, and a 2nd PCR reaction was performed using a thermal cycler ABI2400 under the following conditions.
- the primary denaturation was performed at 95 ° C for 2 minutes, followed by 5 cycles of 3-step cycle PCR (94 ° C for 1 minute, 60 ° C for 1 minute, and 72 ° C for 1 minute), and the 2nd PCR was terminated. Subsequently, 0.5 ⁇ 1 Specific Forward PCR primer (50 ⁇ M, SEQ ID NO: 3) and 0.5 ⁇ 1 Specific Reverse PCR primer (50 ⁇ M, SEQ ID NO: 4) were added to the reaction solution, and the total amount was 25 ⁇ . As 1, a 3rd PCR reaction was carried out with a thermal cycler ABI2400 under the following conditions.
- FGF-23 and various mutants were inserted into pCAGGS3 to prepare expression vectors for each clone. That is, cut Ri by the restriction enzyme EcoRI each clone, resulting EcoRI fragment QIAquick Gel Extraction kit (QIA GEN Inc. Cat. No. 28704) to afford, c each vector ⁇ the EcoRI cut pCAGGS3 Were named pCGF23, pCGFMl-5.
- the plasmid was purified by a method to which endotoxin removal treatment was added. Specifically, Endofree plasmid Maxi Using a kit (QIAGEN Cat. No. 12362), endotoxin-free plasmid purification of pCGF23 and pCGFMl-5 was performed according to the attached protocol.
- PCGF23 and PCGFM2 as the type III primers described in SEQ ID NO: 12 containing the sequence described in SEQ ID NO: 3 and the FLAG sequence
- a mutant containing the FLAG sequence at the C-terminus was prepared.
- PCGF23 and pCGFM2 (30 ng // l), 2.5 il TaKaRa EX lOxPCR buffer, dNTP mix (50 zM), 0.25 1 TaKaR a EX Taq DNA polymerase, 0.51 Specific Forward PCR primer (50 M ⁇ sequence) No .: 11 1), 0.5 il Specific Reverse PCR primer (50 ⁇ M, 5 ggAT CCgAATTCATATgTCACTTATCgTCgTCATCCTTgTAATCgATGAACTTggCgAAgg-3 '/ sequence number: 12), and 18.5 / 1 DDW Under the conditions, the PCR reaction was performed with a thermal cycler ABI2400.
- the FGF23 expression vector with N-terminal FLAG-tag was constructed as follows using the PCR method. 3ng of pCG23 as a template, each of which is a lOOpmol of Specific Forward PCR primer and 23N FLAG R (GCCCTTATCGTCGTCATCCTTGTAATCGGCTCTGAGGACGCTC / SEQ ID NO: 13) or ZSRKGGCTCGAGTCAGATGAACTTGGCGMGGZ SEQ ID NO: 14) and 23N FLAG FGGTCGATCGATCGATC No .: 15) as a set of primers, using Takara Ex Taq and its attached buffer, the first-stage PCR reaction (96 ° C for 15 seconds, 55 ° C for 15 seconds, 72 ° C for 2 minutes, 25 cycles) ) was done.
- the PCR reaction product is applied to Millipore Microcon 30 to remove the primers.
- the mixture of the PCR reaction products is used as a template, and FGF F and 23R1 are used as a primer set.
- a second-stage PCR reaction was performed under the same conditions as described above. After completion of the reaction, the PCR reaction product is purified by agarose gel electrophoresis, this fragment is cloned using the T0P0 cloning kit (manufactured by Invitrogen), and the DNA sequence is read to confirm that the desired mutation has been introduced. It was confirmed that unnecessary mutations were not introduced.
- the plasmid whose sequence was confirmed was prepared, digested with Eco RI, the fragment was recovered, and incorporated into pCAGGS3 which had been cut with Eco RI in advance. After confirming the orientation, the expression vector was finally named PCGF23NF.
- An FGF23M2 tag with an N-terminal FLAG-tag was prepared in the same manner as described above, except that PCGFM2 was used as the template for the first-stage PCR, and named pCGFM2NF.
- the naked DNA injection method was used to examine whether FGF23 and its variants directly or indirectly affect phosphorus metabolism in adult mice.
- the materials used are as follows.
- the dosage form was a solution, and the preparation method followed the protocol of TranslT In Vivo Gene Delivery System (Pan Vera) (TranslT® In Vivo Gene Delivery System (Pan Vera) standard protocol).
- One MOCK vector or FGF23 expression vector or FGF23 mutant expression vector was used at a rate of 10 / g per animal.
- 10 L of TranslT Polymer Solution and an appropriate amount of sterile water were added to make 200 L, and mixed in a 50 mL Falcon tube. After standing at room temperature for 5 minutes, 2.8 mL of 1X Delivery Solution was added to 200 ZL described above to make the total amount 3.0 OmL, and the solution was used as the administration solution.
- a volume of 21 mL was prepared for 7 animals. The administration solution was used up on the day of preparation.
- the animals used and breeding conditions are as follows.
- CE-2 (CLEA Japan) is freely available
- the administration route was intravenous, the dose was 3 ml, and the whole volume was administered within 8 seconds.
- mice On day 3 after administration, the mice were placed in a metabolic cage made of glass (METABOLICA, Motogi Sugiyama), and accumulated urine was collected for 24 hours until day 4. Urine was stored in a freezer at a set temperature of -20 ° C until used for measurement.
- METABOLICA Motogi Sugiyama
- Serum or urine inorganic phosphorus (Pi), calcium (Ca), urea nitrogen (UN), and creatinine (CRE) were measured by an automatic analyzer (Hitachi 7-70 type).
- Serum 25-hydroxyvitamin D and 24,25-dihydroxyvitamin D were measured by the CPBA method, and 1 ⁇ , 25-dihidroxyvitamin D was measured by the RIA2 antibody method.
- the brush border membrane vesicles were purified by the magnesium precipitation method. That is, the collected kidney was caloried with ice-cold MET Buffer (60 mM mannitol, ImM EGTA, 2.5 mM Tris / HCl, pH 7.1), homogenized with a Hiscotron at 18,000 rpm for 1 minute, and 1/10 volume of 1 M MgCl 2 was added, stirred, and left on ice for 15 minutes. After removing the non-crushed fraction by low-speed centrifugation (2,000 X g, 15 minutes, 4 ° C), the supernatant was centrifuged at high speed (24,000 X g, 30 minutes, 4 ° C) to obtain a precipitate.
- MET Buffer 60 mM mannitol, ImM EGTA, 2.5 mM Tris / HCl, pH 7.1
- Hiscotron 18,000 rpm for 1 minute
- 1/10 volume of 1 M MgCl 2 was added, stirred,
- MET Buffer was added to the precipitate, and the mixture was further ground with a Teflon homogenizer (10,000 rpm, 10 strokes). Again, add 1/10 volume of 1M MgCl 2 and stir, ice for 15 minutes After the middle, low speed centrifugation (2,000 X g, 15 minutes, 4 ° C), and the supernatant were centrifuged at high speed (24,000 X g, 30 minutes, 4 ° C).
- Transport Buffer-K (lOOmM mannitol, 20mM
- HEPES Tris, pH 7.4 was added, and the suction and discharge were repeated with a plastic syringe (needle 20G and 27G) to obtain brush border membrane vesicles.
- the reaction solution was immediately suction-filtered through a two-mouthed cellulose membrane (pore diameter: 0.45 / m, diameter: 2.5 cm), and the nitrocellulose membrane was washed with 5 mL of a reaction stop solution.
- the radioactivity captured on the membrane was measured using a liquid scintillation counter TRI-CARB 2700TR (Beckman Co., Ltd.) to determine the total phosphorus transport activity.
- the sodium-independent phosphorus transport activity was measured by changing 125 mM NaCl in the reaction solution to 125 mM KC1.
- Sodium-dependent phosphorus transport activity was calculated from the difference between total phosphorus transport activity and sodium-independent phosphorus transport activity.
- the amount of protein in brush-border membrane vesicles was measured using BCA Protein Assay Reagent (PIERCE), and the amount of phosphorus taken up per unit of protein per minute was measured.
- PIERCE BCA Protein Assay Reagent
- the sodium-dependent phosphorus transporter (Na / Pi) activity in the kidney was significantly lower in the FGF23-M2 administration group than in the MOCK administration group.
- no change was observed in sodium-independent phosphorus transport activity.
- the C2 terminal-deleted M2FGF23 mutant expression vector was constructed as follows using the PCR method. 3ng PCGFM2NF as template, each lOOpmol Specific Forward PCR primer and dC188 (GGCTCGAGTCAGTCCCGCTCCGAGTC / SEQ ID NO: 16), dC194 (GGCTCGAGTCACTTCAGCACGTTCAGGGG / SEQ ID NO: 17),
- PCR reaction (96 ° C 15 seconds, 55 ° C 15 seconds, 72 ° C 2 minutes, 25 cycles) was performed using Takara Ex Taq and the buffer attached to it. Was. After completion of the reaction, the PCR reaction product is purified by agarose gel electrophoresis, the fragment is cloned using a T0P0 Cloning Kit (manufactured by Invitrogen), and the DNA sequence is read to find the desired mutation. It was confirmed that they had been introduced and that unnecessary mutations had not been introduced.
- the plasmids confirmed in three rows of roosters were prepared, cut with Eco RI, and the fragments were collected and incorporated into pCAG GS3 that had been cut with Eco RI in advance.
- These expression vectors are pC (MC188 (dC188), pCGdC194 (dC194), pCGdC200 (dC200), pCGdC210 (dC210), pCGdC217 (dC217), pCGdC223 (dC223), pCGdC240 (dC240), pCGdC245 (dC245), respectively. It was named.
- COS cells After 1 ⁇ 10 5 COS cells were suspended in 1 ml of DMEM (10% FCS) medium (GIBC0), they were spread on a 6-well plate. After overnight culture, l ⁇ g expression vector (pCMcl88 to pCGdc245 shown in Example 8) was introduced into the cells using 3 ⁇ L of FuGene (manufactured by Behringa Co., Ltd.). Cultured. The next day, the medium was replaced with CH0-S-SFMII, and the culture was continued for another 2 days. Two days later, the medium was collected, and the mutant expressed in the medium was found. The protein was analyzed by Western blotting using anti-FLAG antibody (M2) (SIGMA), and the expression of the mutant protein was confirmed.
- M2 anti-FLAG antibody
- the sample was transferred to 0.4 cm (BIO-RAD) and electroporated using a Gene-pulser (BIO-RAD) under the conditions of 0.26 kv, a resistance value of ⁇ , and 960 mF. Then, 30 ml of DMEM (10% FCS) were suspended cell solution into the medium, 175 cm 2 was transferred to a flask (FALCON), C0 2 I matter Bae Isseki one (ESPEC) to 37 ° C for a day at static locations did. The next day, the medium was replaced with 30 ml of CH0-S-SMI I medium (GIBC0), and the cells were cultured for 3 days. The collected medium was centrifuged at 3000 rpm for 15 minutes to remove the cells, and the medium was analyzed by anti-FLAG antibody (M2) (SIGMA) by Western blotting.
- M2 anti-FLAG antibody
- Example 11 Purification of recombinant FGF-23 (M2) -F by affinity column Recombinant FGF-23 variant (M2)-using anti-FLAG antibody affinity column (SIGMA) F was purified. The chromatographic operation was performed using a Gradi-Frac system (Pharmacia). After equilibrating the affinity column with PBS-T, apply the prepared medium expressing the recombinant mutant (M2) -F of Example 10 and elute with glycine HC1 buffer (pH 3.5) Was done. Then, the main peak was fractionated and analyzed by SDS-PAGE. As a result, a band near the target molecular weight, which was almost uniform at the CBB staining level, was confirmed, and the preparation of the recombinant was completed (FIG. 5).
- Example 12 Deletion mutant animal experiment Preparation of the administration agent followed the protocol of Trans IT In Vivo Gene Delivery System (PanVera). Expression vector shown in Fig. 6 per animal (MOCK is the same as in Example 7) Add 10 ⁇ L of TransIT Polymer Solution and an appropriate amount of sterile water to 10 ig, mix to 200 / L, and mix at room temperature for 5 minutes. After standing, 2.8 mL of 1X Delivery Solution was added to make the total volume 3.0 mL, and the solution was used. When administered to 6 animals, a volume of 21 mL was prepared for 7 animals. The administration solution was used up on the day of preparation.
- mice 8- to 9-week-old female CD-1 (ICR) mice (35-40 g) purchased from Charles River Japan Co., Ltd. were acclimated for 1 week and then subjected to experiments. A total of 3 mL of the drug containing the expression vector was administered from the tail vein within 8 seconds. Four days after administration, whole blood was collected from the abdominal vena cava under ether anesthesia, and the collected blood was placed in Separapit Tube Mini (Sekisui Chemical Co., Ltd.) and eccentric (1400 xg, 10 minutes, 4 ° C), and serum was separated. did.
- Serum inorganic phosphorus (Pi), calcium (Ca), urea nitrogen (UN), and creatinine (CRE) were measured by an automatic analyzer (Hitachi 7170E).
- Fig. 6 shows the results.
- the M2FGF23 mutant is composed of 251 amino acids, but the dC200 mutant up to amino acid 200 had the same serum phosphorus lowering effect when the C-terminal part was shortened. However, when the dC194 mutant up to position 194 and the dC188 mutant up to position 188 were further shortened, the effect weakened and was lost. Mutations in the amino acids at positions 176 and 179 in ADHR patients render FGF23 unregulated by evening degradation, resulting in hypophosphatemia due to the presence of excess FGF23 in the blood. Has been guessed. Therefore, from the results of this experiment, it is considered that there is a site important at the amino acid positions 179 to 200 for serum phosphorus lowering.
- Example 13 Effect of FGF23 on parathyroid thyroidectomized rats Thyroid and parathyroidectomy (TPTX) of 8-week-old male SD rats, a few days later, measure ionized calcium, confirm the success of surgery, insert a catheter into femoral vein, urine sack and place in Ballman cage Fixed.
- TPTX parathyroid thyroidectomized rats
- the serum phosphorus concentration of the rats increased by TPTX was normalized by the administration of PTH (34). Normalization was similarly achieved by administration of M2FCT23.
- the serum calcium concentration decreased by TPTX was corrected by the administration of PTH (34)
- administration of M2FGF23 had almost no effect (Fig. 8). This revealed that M2FGF23 did not affect serum phosphorus concentration via PTH, but had no effect on serum calcium concentration.
- an FGF23 protein mutant is provided. Since the FGF23 mutant of the present invention has an effect of lowering the phosphorus concentration in blood, it is expected to be a therapeutic and preventive agent for hyperphosphatemia.
- DNA encoding the FGF23 mutant of the present invention can be expected to be applied to gene therapy for hyperphosphatemia because it reduces blood phosphorus concentration by being introduced and expressed in the body. You.
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/451,942 US20040097414A1 (en) | 2000-12-26 | 2001-12-26 | Human fgf23 protein mutants lowering blood phosphorus level |
EP01271888A EP1354949A4 (en) | 2000-12-26 | 2001-12-26 | HUMAN FGF23 PROTEIN MUTANT FOR REDUCING THE BLOOD PHOSPHORUS MIRROR |
JP2002553490A JPWO2002052009A1 (ja) | 2000-12-26 | 2001-12-26 | 血中リン濃度を低下させるヒトfgf23タンパク質変異体 |
IL15650401A IL156504A0 (en) | 2000-12-26 | 2001-12-26 | Human fgf23 protein mutant lowering blood phosphorus level |
KR10-2003-7008559A KR20030074678A (ko) | 2000-12-26 | 2001-12-26 | 혈중 인농도를 저하시키는 인간 fgf23 단백질 변이체 |
CA002433171A CA2433171A1 (en) | 2000-12-26 | 2001-12-26 | Human fgf23 protein mutants decreasing blood phosphorus level |
HK04105649A HK1062835A1 (en) | 2000-12-26 | 2004-07-31 | Human fgf23 protein mutant lowering blood phosphorus level |
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JP2000396316 | 2000-12-26 | ||
JP2000-396316 | 2000-12-26 | ||
JP2001-161370 | 2001-05-29 | ||
JP2001161370 | 2001-05-29 |
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WO2002052009A1 true WO2002052009A1 (fr) | 2002-07-04 |
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PCT/JP2001/011482 WO2002052009A1 (fr) | 2000-12-26 | 2001-12-26 | Mutant de la proteine fgf23 humaine reduisant le taux de phosphore dans le sang |
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US (1) | US20040097414A1 (ja) |
EP (1) | EP1354949A4 (ja) |
JP (1) | JPWO2002052009A1 (ja) |
KR (1) | KR20030074678A (ja) |
CN (1) | CN1269960C (ja) |
CA (1) | CA2433171A1 (ja) |
HK (1) | HK1062835A1 (ja) |
IL (1) | IL156504A0 (ja) |
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WO (1) | WO2002052009A1 (ja) |
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US8889621B2 (en) * | 2009-10-30 | 2014-11-18 | New York University | Inhibiting binding of FGF23 to the binary FGFR-Klotho complex for the treatment of hypophosphatemia |
WO2013027191A1 (en) * | 2011-08-25 | 2013-02-28 | Novartis Ag | Methods and compositions using fgf23 fusion polypeptides |
JP6190871B2 (ja) * | 2012-03-30 | 2017-08-30 | ノバルティス アーゲー | 低リン血症性障害の処置に使用するためのfgfr阻害剤 |
US9657075B2 (en) | 2012-06-07 | 2017-05-23 | New York University | Chimeric fibroblast growth factor 23 proteins and methods of use |
CN103224557B (zh) * | 2012-08-08 | 2014-10-01 | 温州医学院 | 一种长效型成纤维细胞生长因子-23拮抗剂的开发 |
US9550820B2 (en) | 2013-02-22 | 2017-01-24 | New York University | Chimeric fibroblast growth factor 23/fibroblast growth factor 19 proteins and methods of use |
CN106456714A (zh) | 2014-03-28 | 2017-02-22 | 纽约大学 | Fgf23融合蛋白 |
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WO2000073454A1 (en) * | 1999-06-02 | 2000-12-07 | Genentech, Inc. | Secreted and transmembrane polypeptides and nucleic acids encoding the same |
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2001
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- 2001-12-26 EP EP01271888A patent/EP1354949A4/en not_active Withdrawn
- 2001-12-26 RU RU2003123108/13A patent/RU2003123108A/ru not_active Application Discontinuation
- 2001-12-26 US US10/451,942 patent/US20040097414A1/en not_active Abandoned
- 2001-12-26 KR KR10-2003-7008559A patent/KR20030074678A/ko not_active Application Discontinuation
- 2001-12-26 WO PCT/JP2001/011482 patent/WO2002052009A1/ja not_active Application Discontinuation
- 2001-12-26 CA CA002433171A patent/CA2433171A1/en not_active Abandoned
- 2001-12-26 JP JP2002553490A patent/JPWO2002052009A1/ja active Pending
- 2001-12-26 IL IL15650401A patent/IL156504A0/xx unknown
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WO2000073454A1 (en) * | 1999-06-02 | 2000-12-07 | Genentech, Inc. | Secreted and transmembrane polypeptides and nucleic acids encoding the same |
Non-Patent Citations (3)
Title |
---|
"The ADHR consortium, autosomal dominant hypophosphataemic rickets is associated with mutations in FGF23", NAT. GENET., vol. 26, November 2000 (2000-11-01), pages 345 - 348, XP001000443 * |
See also references of EP1354949A4 * |
YAMASHITA, T. ET AL.: "Identification of a novel fibroblast growth factor, FGF-23, preferentially expressed in the ventrolateral thalamic nucleus of the brain", BIOCHEM. BIOPHYS. RES. COMMUN., vol. 277, no. 2, October 2000 (2000-10-01), pages 494 - 498, XP001055003 * |
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JPWO2002052009A1 (ja) | 2004-04-30 |
HK1062835A1 (en) | 2004-11-26 |
CN1269960C (zh) | 2006-08-16 |
CA2433171A1 (en) | 2002-07-04 |
RU2003123108A (ru) | 2005-02-27 |
IL156504A0 (en) | 2004-01-04 |
EP1354949A1 (en) | 2003-10-22 |
US20040097414A1 (en) | 2004-05-20 |
KR20030074678A (ko) | 2003-09-19 |
CN1492927A (zh) | 2004-04-28 |
EP1354949A4 (en) | 2004-05-19 |
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