WO1996026960A1 - Facteur de croissance de fibroblaste de base de poisson, adn et son utilisation - Google Patents
Facteur de croissance de fibroblaste de base de poisson, adn et son utilisation Download PDFInfo
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- WO1996026960A1 WO1996026960A1 PCT/JP1996/000436 JP9600436W WO9626960A1 WO 1996026960 A1 WO1996026960 A1 WO 1996026960A1 JP 9600436 W JP9600436 W JP 9600436W WO 9626960 A1 WO9626960 A1 WO 9626960A1
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- fish
- bfgf
- protein
- dna
- growth factor
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/475—Growth factors; Growth regulators
- C07K14/50—Fibroblast growth factor [FGF]
- C07K14/503—Fibroblast growth factor [FGF] basic FGF [bFGF]
-
- 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 includes a fish basic fibroblast growth factor (hereinafter sometimes abbreviated as âbFGFâ) protein, a DNA having a base sequence encoding the protein, and the DNA.
- bFGF fish basic fibroblast growth factor
- the present invention relates to a vector, a transformant carrying the vector, a method for producing fish bFGF by culturing the transformant, and a use of fish bFGF.
- b FGF was initially found as a factor that has a strong growth-promoting effect on fibroblasts, such as BALB / c 3 T 3 cells, from the pituitary gland of mammals [D. Gospodarowicz, nature , 249, 123 (1 979)]. Subsequently, it was found to have a growth stimulating effect on most mesodermal lineage-derived cells and an angiogenic effect. Since bFGF has such an effect, it is expected to be used as a prophylactic agent such as an angiogenesis promoter or a wound healing agent.
- fibroblasts such as BALB / c 3 T 3 cells
- the problem to be solved by the present invention is to clone the bFGF b gene of fish, and to prove the existence of bFGF in fish.
- Fish b F G F having a biological activity such as a cell proliferation promoting effect is expected to be used as a healing promoter for fish wounds generated during breeding and transportation.
- Fish, especially farmed fish are susceptible to skin damage because they are confined to a small environment.
- due to underwater life there are countless bacterial and microbial organisms in the surrounding area, and once a wound is made, it easily progresses to infection.
- the occurrence of scars is a major problem.
- the number of cases of transporting fish has increased due to improvements in the transport technology for live fish, etc., but the damage associated with transport has become a problem.
- the use of bFGF derived from fish is more effective than the previously reported bFGF of humans, etc., when the species specificity of bFGF is considered.
- An object of the present invention is to provide rainbow trout basic fibroblast growth factor, DNA and uses thereof.
- the present invention relates to an expression vector containing a cloned rainbow trout basic fibroblast growth factor, a DNA having a nucleotide sequence encoding the protein, a recombinant DNA having the nucleotide sequence, and a recombinant DNA.
- the object of the present invention is to provide a transformant transformed by an expression vector, a method for producing the protein, a therapeutic agent for wounds of fish containing the protein as an active ingredient, and a method for rearing and transporting fish in the presence of the protein.
- the mammalian bFGF protein is encoded using a cDNA library prepared from the pituitary gland of fish, rainbow trout. CDNA having high homology to the nucleotide sequence was cloned. Furthermore, they have found that the obtained protein encoded by cDNA has a growth-promoting effect on fish cells, and as a result of further research based on these findings, they have completed the present invention.
- the present invention relates to (1) a fish basic fibroblast growth factor (bFGF) protein, (2) a DNA having a nucleotide sequence encoding the protein of the above (1), and (3) a DNA of the above (1). And (4) an expression vector containing the recombinant DNA of (3) above, and (5) a transformation transformed by the expression vector of (4) above. (6) a method for producing the protein of (1), wherein the transformant of (5) is cultured in a medium, and (7) treatment of a fish wound comprising the protein of (1) as an active ingredient. (8) A method of breeding or transporting fish in the presence of the protein of (1) above.
- bFGF fish basic fibroblast growth factor
- rainbow trout bFGF which has been successfully cloned for the first time in fish.
- fish growth hormones have been cloned and analyzed from more than 10 species of fish, including salmon, rainbow trout, pu-ri, perch, eel, and flounder. Have.
- the rainbow trout bFGF gene cloned this time is also very good in other fishes. It is thought that the bFGF gene of other fishes can be easily cloned using the information of the rainbow trout bFGF gene.
- the cDNA sequence of FGF has been determined in humans, pests, African frogs and the like.
- a PCR primer for cloning bFGF from rainbow trout was created mainly around the region of high homology.
- CDNA was synthesized from rainbow trout pituitary gland mRNA, and PCR was performed with mixed primers to obtain a band of the desired size. This band was incorporated into pSK vector and the nucleotide sequence was determined. As a result, the fragment showed high homology with human bFGF. Therefore, this fragment was estimated to be rainbow trout bFGF.
- CDNA was prepared again from mRNA of the pituitary gland pituitary gland, and PCR was performed using the above-mentioned Braima-EF1 / EF2. As a result, the desired 470 bp fragment was amplified. This fragment was inserted into the EcoRI site of the pSK vector, and the nucleotide sequence was determined. The nucleotide sequence was completely identical to the amino acid coding region in Table 1. The obtained plasmid was designated as pSK-FGF-W.
- a method for producing a fish bFGF protein which comprises culturing a transformant in a medium.
- the transformant retaining pKK-FGF-W was cultured in L-br0thh at 37 with 0D660 to about 0.6, induced by IPTG, and further cultured for 3 hours. After centrifugation, the culture is suspended in buffer A (10 mM TrisâHCL pH 7.5, ImM EDTA, ImM DTT), and T was added to a final concentration of 0.1%. Add riton X-100 and let stand on ice for 10 minutes. Next, the cells are disrupted by ultrasonication, and the supernatant obtained by centrifugation is applied to heparin sepharose CL-6B which has been equilibrated with buffer 1A in advance. After washing with buffer A containing 0.5 M NaCl, elute with buffer A containing 2.0 M NaCl.
- bFGF is a factor that promotes fibroblast proliferation.
- the cell growth factor activity of rainbow trout bFGF produced using E. coli was examined in BALB 3/3 mouse-derived fibroblasts and RBCF-1 fin-derived fibroblasts from goldfish, and both cells were proliferated by rainbow trout bFGF.
- the target of wound healing is ornamental fish such as cultured fish, parent fish for cultured seedlings, carp, goldfish, and tropical fish.
- bFGF When used as a therapeutic agent, bFGF can be used at a concentration of from 0.01 ng / ml to LOOng / ml.
- bFGF is known to be stabilized by combined use with heparin and to be effective at low concentrations. This effect can be used when applied to fish that can be used as it is when dissolved in water.
- the activity of recombinant fish bFGF is enhanced by co-presence of heparin.
- the recombinant fish bFGF exerts its effects effectively in smaller amounts due to the presence of heparin.
- FIG. 1 is a drawing showing a comparison between the bFGF sequence of a human / African toad frog and the sequence of rainbow trout bFGF.
- FIG. 2 is a photograph of electrophoresis showing that bFGF is expressed by induction of IPTG.
- FIG. 3 is an explanatory diagram showing the growth promoting effect of rainbow trout bFGF on a cultured cell line.
- FIG. 4 is a drawing showing a process of excision of the caudal fin of red sea bream to examine the effect of bF G F on regeneration, and a photograph of the morphology of the organism showing the caudal fin of red sea bream.
- Fig. 5 is a photograph of the morphology of the creature showing the regeneration of the caudal fin of red sea bream in the control plot.
- FIG. 6 is a photograph of the morphology of an organism showing the effect of bFGF on the regeneration of the caudal fin of red sea bream.
- FIG. 7 is a drawing showing the intensity of bFGF activity by heparin.
- Example 1 Example 1
- RNA was extracted from about 500 mg of rainbow trout pituitary gland according to a conventional method. About 20 g of poly RNA was purified from the obtained total RNA using an oligotex column (Takara Shuzo).
- a synthetic mix primer (F1 / F2) for a region of high homology to the previously reported human and African frog bFGF gene was prepared [F1; TA (T / C) TG].
- cDNA (Stratagene, First Strand Synthesis Kit) synthesized from pituitary gland mRNA as type I was subjected to PCR under the following conditions. 94. The cycle of 30 seconds at C, 45 seconds at 45 ° C, and 72 â 120 seconds was repeated 30 times. The composition of the reaction solution was in accordance with the method of Behringer, Inc. As a result of the PCR, a band considered to be of a desired size was detected. As a result of integrating this band into the pSK vector and determining the nucleotide sequence, high homology was observed with human bFGF, and thus the inserted fragment was presumed to be digima trout bFGF.
- FIG. 1 shows the result of comparison between the bFGF sequence of human / African clawed frog and the sequence of rainbow trout bFGF.
- the homology between human and African frogs was about 85%, whereas the bFGF of rainbow trout and human or African frogs was only about 75% homologous.
- CDNA was prepared again from mRNA of the rainbow trout pituitary gland, and PCR was performed using the above-mentioned primers EF1 / EF2. As a result, the desired 470 bp fragment was amplified. This fragment was inserted into the EcoRI site of the pSK vector and the nucleotide sequence was determined. The nucleotide sequence was completely consistent with the amino acid coding region in Sequence Listing 1.
- the resulting plasmid was named pSK-FGF-W.
- the E. coli strain carrying this recombinant plasmid was named NS-101 (Escherichia coli NS-101).
- the EscoRI fragment of pSK-FGF-W was inserted into an expression vector pKK222-2 (manufactured by Pharmacia) in order to express bFGF in large amounts in E. coli.
- the orientation of the obtained recombinant was confirmed, and PKK-FGGF-W was obtained.
- the transformant retaining pKK-FGF-W was cultured in L-broth at 37 ° C until OD660 reached about 0.6, induction with IPTG was performed, and the culture was further continued for 3 hours.
- the bFGF fragment was incorporated into the E. coli expression vector pKK233-2 to prepare a producing bacterium. It can be seen that bFGF is expressed by induction of IPTG (Fig. 2).
- bFGF has a very high affinity for heparin like aFGF (acid fibroblast growth factor).
- aFGF acid fibroblast growth factor
- the MTT method was used for evaluating the activity of promoting cell proliferation.
- RBCF1 cells a fish-derived fibroblast cell line, were isolated and recovered by trypsinization, and then were added to a serum-free medium (1 mg of BSA, 0.1 lm in a 1: 1 mixed medium of DME and F-12).
- 4 x 10 3 cells were rolled in per well of a 96-well multiplate. The medium volume was 100 liters per well, and each concentration of bFGF was added.
- FIGS. 5 and 6 The results of the fin regeneration rate in each test plot are shown in FIGS. 5 and 6.
- the regeneration rate of the bFGF treated group 2 days after the immersion treatment tended to be higher than that of the control group.
- Regeneration of the resected fins of the control fish proceeds from the vertical and horizontal intersection of the resected fins (Fig. 5).
- regeneration of bFGF-treated plots is progressing not only at the intersection but also over a wide area (Fig. 6). This means that bFGF is effectively acting on red sea bream, closing the wound of the fin early, shortening the contact time between the wound and the external environment, and preventing the invasion and infection of the pathogen from the wound. It indicates that there is.
- Example 3 Example 3
- RBCF1 cells a fish-derived fibroblast cell line
- a serum-free medium (1 mg / liter BSA in a 1: 1 mixed medium of DME and F-12).
- resuspended â Four hundred and three cells were rolled in per well of the coated 96-well multiplate.
- the medium volume was 100 liters per well, and each concentration of bFGF was added together with heparin.
- 5 g Z-liter of MTT solution was added at 10 â liters per well, and the reaction was carried out at 37 for 4 hours, and the resulting formazan was added to 0.04 NHC 1
- the absorbance at a wavelength of 570 nm was measured at a reference wavelength of 655 nm.
- Recombinant fish b FGF reduced the active concentration by more than an order of magnitude in the presence of heparin. This indicates that the presence of heparin allows the recombinant fish bFGF to exert its effect in smaller amounts.
- Effect of bFGF on rainbow trout burn healing 5 On a rainbow trout body with a length of about 8 cm, burn instantaneously with a soldering iron with a flat tip and a diameter of 3 mm. As a result, the epidermis of the body is peeled off, and a damaged area with a diameter of 4 mm is formed.
- This wound-treated rainbow trout was divided into two groups, one group was added at a concentration of bFGFlOnggZml in a two-liter aquarium, and the other group was added in a two-liter aliquot-free tank. For 30 minutes each. After that, each group was transferred and raised in a 20 liter aquarium.
- Wound treatment On the 1st and 2nd days, the injured site was photographed at the same magnification, and the area of the injured site for each individual was image-analyzed. Table 1 shows the results. From these results, it was shown that bFGF had an effect of promoting the healing of the damaged site by a simple method when added to breeding water. Healing promotion effect of b FGF on the 1st and 2nd days
- Sequence type nucleic acid
- Organism g: rainbow trout (Oncorunynchus mykiss)
- GAG CCC AAG AGG TTG TAC TGT AAA AAT GGA GGC TAC TTC TTG AGG ATA 566
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Description
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1 . éé¡ã®å¡©åºæ§ç¹ç¶èœçŽ°èå¢æ®å åèçœè³ªã
2 . éé¡ã®å¡©åºæ§ç¹ç¶èœçŽ°èå¢æ®å åãã³â ãããå¡©åºé
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1ã®èçœè³ªã®ååšäžã§éé¡ã飌è²ãããã¯éæ¬ããããšãç¹ åŸµãšããéé¡ã®é£Œè²ãããã¯éæ¬æ¹æ³ã
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±åãããè«æ±é
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7/77019 | 1995-02-26 | ||
JP7701995 | 1995-02-26 |
Publications (1)
Publication Number | Publication Date |
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WO1996026960A1 true WO1996026960A1 (fr) | 1996-09-06 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP1996/000436 WO1996026960A1 (fr) | 1995-02-26 | 1996-02-26 | Facteur de croissance de fibroblaste de base de poisson, adn et son utilisation |
Country Status (1)
Country | Link |
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WO (1) | WO1996026960A1 (ja) |
-
1996
- 1996-02-26 WO PCT/JP1996/000436 patent/WO1996026960A1/ja active Application Filing
Non-Patent Citations (4)
Title |
---|
CELL STRUCTURE AND FUNCTION, (1994), Vol. 19, No. 6, INABA K. et al., "Expression Patterns of FGF-1 and -2 in Loach Fish Embryos and Their Characterization", p. 545. * |
FISH PHYSIOLOGY AND BIOCHEMISTRY, (1994), Vol. 13, No. 4, SUZUKI T. et al., "Identification of a Heparin-binding, Mesoderum-Inducing Peptide in the Swim-Bladder of the Red Seabream, Pagrus Major: A Probable Fish Fibroblast Growth Factor", p. 343-352. * |
SCIENCE, (1988), Vol. 242, KIMELMAN D. et al., "The Presence of Fibroblast Growth Factor in the Frog Egg: its Role as a Natural Mesoderm Inducer", p. 1053-1056. * |
THE EMBO JOURNAL, (1986), Vol. 5, ABRAHAM J.A. et al., "Human Basic Fibroblast Growth Factor: Nucleotide Sequence and Genomic Organization", p. 2523-2528. * |
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