WO2005065450A1 - 遺伝子導入鳥類及びその作製法 - Google Patents
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- C—CHEMISTRY; METALLURGY
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
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- C12N15/8509—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells for producing genetically modified animals, e.g. transgenic
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- A—HUMAN NECESSITIES
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- A01K67/027—New or modified breeds of vertebrates
- A01K67/0275—Genetically modified vertebrates, e.g. transgenic
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K2217/00—Genetically modified animals
- A01K2217/05—Animals comprising random inserted nucleic acids (transgenic)
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K2227/00—Animals characterised by species
- A01K2227/30—Bird
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K2267/00—Animals characterised by purpose
- A01K2267/01—Animal expressing industrially exogenous proteins
Definitions
- the present invention relates to a method for producing transgenic birds that can be applied to the production of bioactive proteins, and to a transgenic bird obtained by the method.
- bioactive proteins such as erythropoietin, which require sugar chains, and antibody drugs are currently produced in cultured cell reactors.
- production methods using animal cells are more costly than microorganisms. Costs are high, increasing the burden on patients and the government.
- transgenic animals As a new protein production method that overcomes these drawbacks, the use of transgenic animals (transgenic animals) has attracted attention. Proteins produced by transgenic animals in milk, blood, and eggs are carbohydrate-added, and the production cost is 1Z
- Non-Patent Document 1 There is also a trial calculation of 10-1 / 100 (Non-Patent Document 1). Among them, transgenics using birds are expected to be put to practical use because they have the advantages of a short period of maturity and a small breeding area.
- Non-Patent Document 2 An external gene to avian fertilized eggs Although it was difficult to introduce E. coli (Non-Patent Document 2), the present inventors used a highly safe replication-defective virus vector and microinjected the gene into the early bird embryo to obtain the body. The transgenic chimera (called GO), which has a transgene in a part of it, was successfully produced (Patent Document 1).
- the gene thus introduced is inactivated by a host defense mechanism having host power S (a phenomenon called silencing), and does not express the protein, or even a small amount of the protein is expressed. Furthermore, in order to stably supply proteins as pharmaceuticals, it is necessary to establish a lineage of birds that have transgenes in whole somatic cells as descendants of GO transgenic chimeras. The descendants of these G0 transgenic chimeras are called G1-G2-G3- according to their generation number Patent Document 1: JP-A-2002-176880
- Patent Document 2 JP 2001-520009
- Non-patent literature l Nature Biotechnology 19, 184 2001
- Non-Patent Reference 2 Harvey AJ, et al. Consistent production of transgenic c hickens using replication— deficient retroviral vectors and high— thro ughput screening procedures. Poult. Sci. Feb. 2002, Vol. 81, No. 2, p. 202 -212
- the present invention provides a method for transgenic birds to be applied as a safe and efficient protein production system.
- the aim is to establish a transgenic bird production method with high expression efficiency.
- the transgenic bird of the present invention hatches avian fertilized eggs and removes the blastoderm stage immediately after oviposition to an early embryo thereafter.
- G1 transgenic birds can be obtained by crossing the GO transgenic chimeric birds with the GO transgenic chimeric birds or their progeny, or wild-type birds.
- G2 transgenic birds and their progeny that are born successively by crossing the G1 transgenic birds with GO transgenic chimeras, G1 transgenic birds, wild-type birds, and the like. I do.
- the present invention also provides a G2 transgenic bird obtained by crossing a G1 transgenic bird with a GO transgenic bird, the G1 transgenic bird or its progeny, or a wild-type bird. It is a transgenic bird characterized by its descendants.
- transgenic birds that effectively express By injecting into the early heart formed in the embryo, transgenic birds that effectively express can be obtained.
- Examples of the target protein gene to be introduced into transgenic birds include those requiring a sugar chain for the activity of the expressed protein, such as the gene constituting erythropoietin, and antibody genes.
- a target protein By using a bird or a pea as a bird into which a gene is introduced, a target protein can be stably obtained in the form of an egg in high yield.
- the present invention also relates to an early embryo after hatching a fertilized avian egg and excluding the blastoderm stage immediately after oviposition,
- a method for producing a G1 transgenic bird comprising crossing the GO transgenic chimeric bird with the GO transgenic chimeric bird or a progeny thereof, or a wild-type bird.
- the present invention also provides the G1 transgenic bird, wherein the G1 transgenic bird is a G1 transgenic bird.
- a method for producing transgenic birds which comprises producing G2 transgenic birds or their progeny by crossing with transgenic birds or their progeny or wild-type birds.
- the present invention is also a method for producing a protein, comprising extracting a target protein from somatic cells, blood or eggs of transgenic birds produced by the above method.
- the present invention also relates to a transgenic bird produced by the method described above.
- a germline chimera having a gene inserted into the germline is selected from the prepared GO transgenic chimeras.
- screening it is possible to identify GO parents that efficiently produce G1.
- This sorting method is also one of the present invention.
- the present invention also provides a microinjection of a replication-defective retrovirus vector encoding a protein of interest in an embryo after hatching a fertilized avian egg and excluding the blastoderm stage immediately after oviposition. This is a method for selecting GO transgenic chimeric birds by confirming expression of a target protein in the blood of GO transgenic birds obtained by hatching.
- the present invention discloses a method for producing transgenic birds that are advantageous for protein production. Also disclosed are transgenic birds produced by the method.
- Transgenic birds produced by this method can be used for the production of proteins that can be used for pharmaceuticals and the like.
- the G1 transgenic bird and / or its progeny of the present invention is a bird into which a foreign gene has been introduced by a replication-defective retrovirus vector, which contains the foreign gene evenly in its somatic cells, and Characterized in that the target protein derived from E. coli is stably expressed in blood, egg white or egg yolk.
- the birds used in the present invention are not particularly limited, and include, for example, poultry birds and pet birds domesticated for meat and egg collection purposes, such as birds, turkeys, ducks, locusts, and quail. Can. Above all, it is preferable that birds and birds are easily available, and that they are prolific in spawning species.
- retrovirus vector used in the present invention examples include a vector derived from Moro-I 'murine' Leukemia 'virus (MoMLV), Evian leukosis virus (ALV), and a lentivirus vector. . Among them, those derived from MoMLV are preferable, but the present invention is not limited to this.
- a virus used as a gene transfer vector usually lacks one or all of the three genes gag, pol, and env required for replication of virus particles, and thus has a self-replicating ability.
- a virus deficient in is used.
- a virus vector in which the outer coat protein is artificially VSV-G (derived from vesicular stomatitis virus) pseudotype is preferable, but the present invention is limited to this virus type. Not something.
- Pseudo-type viral vectors prepared by using knocking cells or helper virus, etc. can be used to prepare early embryos, by the usual microinjection method (Bosselman, RA et al. (1989) Science 243, 533). It is introduced into blood vessels and the heart. In addition to these, a gene transfer method such as a lipofection or elect-portation method can be considered.
- the gene introduced into birds according to the present invention is not particularly limited, but includes a marker gene, a structural gene for expressing a target protein, a promoter gene for controlling the expression of these genes, a secretion signal gene, and the like. Is done.
- Examples of the marker gene include a neomycin resistance gene,
- the structural gene for expressing the target protein is not particularly limited, and examples include a gene encoding an antibody, an enzyme, or the like useful in the gene industry such as a human monoclonal antibody.
- genes of other useful physiologically active substances can also be used.
- the genes of antibodies with constant regions of the human IgG class and antibodies with the constant regions of subclasses of human IgGl, Pezura IgG2, -Petri IgG2 and mouse IgG2 Structural genes of exogenous antibodies, such as genes are preferred.
- Preferred examples of the structural gene include a structural gene of a chimeric antibody.
- Chimeric antibodies are antibodies composed of two or more different genetic traits.
- a medical antibody produced by a mouse or an ibridoma is derived from a mouse, so that when administered to a human body, there is a problem that a rejection reaction by the immune system is caused.
- the risk of rejection can be greatly reduced by, for example, humanizing the Fc portion or the like of a mouse antibody by a recombinant technique.
- chimeric antibodies examples include anti-human CD2 antibody, anti-CD20 receptor antibody, anti-TNF antibody and the like, and some of them have already been described as pharmaceuticals.
- More preferable structural genes include structural genes of scFv-Fc antibodies.
- Another group of medical-use recombinant antibodies is called a low-molecular antibody.
- Immunoglobulin IgG has a domain composed of VH and VL heterodimers called the Fvment of variable region (Fv: Fragment of variable region) that directly binds to the antigen. This Fv domain is about one-fifth of IgG. Despite its molecular weight, it has sufficient antigen binding ability by itself.
- a single-chain antibody (scFv: single chain) in which VH and VL domains are artificially linked with a peptide linker
- Fv small molecule antibody
- the antibody content in blood is preferably 0.5 ⁇ gZml or more, more preferably 5 ⁇ gZml or more.
- the antibody content in egg white is preferably 0.1 ⁇ g Zml or more, more preferably 1 ⁇ g It is at least Zml and the antibody content in the yolk is preferably at least 0.1 ⁇ g Zml, more preferably at least gZml.
- the antibody content in the blood is preferably at least 20 ⁇ gZml, more preferably at least 2000 ⁇ gZml.
- the antibody content in the egg white is preferably 5 / z gZml or more, more preferably 500 gZml or more.
- the antibody content in egg yolk is preferably at least 1 ⁇ gZml, more preferably at least 100 gZml.
- the promoter gene includes a constitutive promoter. It is preferable that the antibody gene is controlled by a constitutive promoter, since the expression of the antibody gene may be stabilized.
- a more preferred constitutive promoter is -Avian j8-actin motor.
- the protein production method of the present invention is characterized in that a target protein is recovered from the transgenic bird. More specifically, the present invention relates to a method for producing a protein for recovering and purifying a target protein from somatic cells, blood, and Z or eggs of transgenic birds. Eggs produced by the transgenic birds of the present invention are also one of the present invention.
- the content of the target protein in the above egg is preferably lmgZlOOg or more, more preferably 20mgZlOOg. It is at least lOOg, particularly preferably at least lOOmgZlOOg.
- a fertilized avian egg is incubated, and a replication-defective retrovirus vector is transmitted to an early embryo except a blastoderm stage immediately after oviposition, and the embryo is transfected. Incubation method is mentioned.
- a method for incubating avian fertilized eggs, incubating the embryo with a replication-deficient retrovirus vector in an embryo that preferably has an incubating power of preferably 24 hours or more, more preferably 48 hours or more, and incubating the embryo is also described in the present invention. This is one of the production methods of the invention.
- the method for producing a GO transgenic chimeric bird according to the present invention comprises microinjecting a replication-defective retrovirus vector into a fertilized egg that has passed a specified time after oviposition.
- the embryo divides into an upper layer and a lower layer, forming a blastocoel. Oviposition occurs when the lower layer of the blastoderm is formed, the original streak is formed, and the blastoderm takes the upper, middle, and lower triple structures, and the three germ layers are formed. Then, after embryo formation and growth, they hatch on day 22 after ovulation.
- the blastoderm stage is also called stage X, and since germ cells are generated from some of the cells at this stage, fertilized eggs at this stage are conventionally used for gene transfer.
- fertilized eggs in the blastoderm stage immediately after oviposition are hatched under conditions suitable for hatching, for example, at a temperature of about 37.7 to 37.8 ° C and a humidity of about 50 to 70% for chickens.
- the microinjection was performed with the passage of time as 0 hour. From 36 hours after the start of hatching in the quail and 50 hours after the start of incubation in the chick, the formation of a vasculature was observed on the yolk, and the pulsation of the organs confined to the heart could be observed.
- the replication-defective retrovirus vector, the gene to be introduced, and the transgenic bird used in the production method of the present invention include those similar to the GO transgenic chimeric bird described above.
- a gene not derived from a retrovirus be contained in a replication-defective retrovirus vector!
- examples of the “gene that is not derived from a retrovirus” include the above-mentioned structural gene, promoter gene, secretion signal gene and the like.
- the above-mentioned gene not derived from retroinoles is preferably a gene controlled by the -petri j8-actin promoter. Further, the gene not derived from the retrovirus is preferably a gene encoding an antibody.
- replication ability having a titer of preferably 1 ⁇ 10 7 cfu / ml or more, more preferably 1 ⁇ 10 8 cfu / ml or more, and still more preferably 1 ⁇ 10 9 cfu / ml or more Microinjection of the deletion type retrovirus vector is preferable in that the gene can be efficiently introduced.
- birds in which a gene has been introduced into a fertilized egg grow as transgenic birds having the transgene in a mosaic form in their somatic cells.
- This first-generation transgenic bird is called a GO transgenic chimeric bird.
- the second and third generations born by crossing GO transgenic chimeric birds and non-transgenic chimeric birds or GO transgenic chimeric birds are germ cells that have the introduced gene on the chromosome. When it develops from, it grows as an individual containing the transgene in somatic cells throughout the body. The offspring that inherit this germline chimeric individual transgene are called G1-G2-G3-transgenic birds for generations.
- the transgene By crossing the GO transgenic chimeric bird according to the present invention with a non-transgenic bird of the same species or a mated GO transgenic chimeric bird, the transgene can be transmitted to offspring, Complete transgenic birds with the transgene in somatic cells throughout the body can be produced.
- a transgene that stably transmits a transgene Establishing the ethnic bird strain enables stable quality production as a protein production system. Furthermore, since transgenic birds that are completely transgenic have a higher percentage of somatic cells carrying the transgene, it is expected that the amount of recombinant protein derived from the transgene may increase compared to GO transgenic chimeric birds. it can.
- the method for producing G1 transgenic birds of the present invention comprises producing and crossing the aforementioned GO transgenic chimeric birds.
- Mating types include GO transgenic female and wild-type female, GO transgenic female and wild-type female, GO transgenic female and female, and backcrossing by offspring and their parents is also possible. It is. Among them, the mating type of GOos and wild-type females is preferable in terms of efficiency because one GOos can cross 3 to 10 wild-type females.
- Germ-line chimeras can be selected by collecting the GOs sperm and examining the presence or absence of a transgene in the sperm.
- the transgene assay may be a PCR method, a Western plot method, or the like, but the present invention is not limited thereto.
- Another aspect of the present invention is a method for selecting a germline chimera in which G1 transgenic birds, G2 transgenic birds and their offspring oss sperm are collected, and the genes in the sperm are similarly tested. .
- a germline chimera is an individual having both sperm having a transgene and having no sperm. Chick matured from an embryo fertilized with the sperm containing the transgene become G1 transgenic with the transgene in all its somatic cells. Selecting germline chimeric GOs can produce G1 transgenic chimeric birds more efficiently than crossing randomly.
- the G1 transgenic bird and its progeny of the present invention must efficiently express a foreign gene introduced by a highly safe replication-defective retrovirus vector without inactivating it. Can be.
- the G1 transgenic bird of the present invention has a transgene present in all somatic cells, has stable protein expression at the individual level, and can be a stable supply system as an established strain. Further, the method for producing transgenic birds of the present invention makes it possible to safely and efficiently produce G1 transgenic birds, and G2 and G3 transgenic birds as descendants thereof.
- the Gl, G2, G3-transgenic birds of the present invention express a protein derived from a foreign gene in somatic cells, and recover and purify serum, albumen, and egg yolk proteins. It is possible to supply an inexpensive production system for proteins and antibodies attached to sugar chains that have been difficult to produce.
- the scFv-Fc antibody expression vector construct was prepared as follows.
- pMSCVneo removed from (Clontech) by a series of murine 'phosphoglycerate' kinase (PGK) restriction fragment containing the promoter and Neo 1 gene enzymes Bglll and BamHI, and the remaining vector fragment Serufurai Plasmid pMSCV was prepared by the procedure.
- PGK murine 'phosphoglycerate' kinase
- a GFP gene fragment was excised from pGREEN LANTERN-1 (manufactured by Gibco BRL) using the restriction enzyme Notl, and inserted into the Notl site of pZeoSV2 (+) (manufactured by Invitrogen).
- a plasmid having a structure in which the GFP gene was inserted in the same direction as the T7 promoter was designated as pZeoZ GFP.
- a GFP gene fragment was excised from pZeoZGFP with restriction enzymes EcoRI and Xhol, and ligated to a vector fragment of pMSCV treated with restriction enzymes EcoRI and Xhol to prepare plasmid pMSCV / G.
- ⁇ Act promoter After amplifying the one fragment, the ⁇ Ac promoter fragment was cut out with the restriction enzyme Sail and inserted into the Sail site of pETBlue-2 (manufactured by Novagen) to prepare a plasmid pETBlue / ⁇ Act.
- a ⁇ Act promoter fragment was excised from pETBlueZA Act with the restriction enzyme Sail, and inserted into the Xhol site of pMSCVZG.
- a plasmid having a structure into which the ⁇ Act promoter was inserted in the same direction as the GFP gene was designated as pMSCVZG ⁇ A.
- a scFv gene fragment was excised from pBlueZscFv with restriction enzymes Notl and BamHI, and inserted into NotI and BamHI sites of pCEP4 (Invitrogen) to prepare plasmid pCEP4ZscFv.
- the two i-Dai ⁇ 1 synthetic gen- eratives 5 attaggatccgagcccaaatcttgtgacaaact c-3 '(SEQ ID NO: 9, underlined BamHI restriction enzyme site) and 5'-agc ⁇ Seiitcatttac ccggagacaggga-3' (SEQ ID NO: 10) ,
- the underlined part is Hindlll restriction enzyme site) as a primer.
- a scFv gene fragment was excised from pCEP4ZscFv with the restriction enzymes Hindlll and BamHI.
- An Fc gene fragment was excised from pBlueZFc with the restriction enzymes BamHI and Hindlll. The two fragments cut out above were inserted into the Hindlll site of pBluescriptIISK (+) to prepare a plasmid pBlue / scFv-Fc.
- a gene fragment of the structure (scFv-Fc) in which the human antibody H chain ⁇ 1'Fc is linked to the variable region of the -chain tree antibody from pBlueZscFv-Fc is excised with the restriction enzyme Hindlll, It was ligated to the treated vector fragment of pMSCVZG ⁇ A.
- a plasmid having a structure in which the scFv-Fc gene was ligated in the same direction as the ⁇ Act port motor was designated as pMSCVZGAAscFv-Fc.
- knocking cells GP293 (manufactured by Clontech) were inoculated into 5 ⁇ 10 6 cells in a culture dish having a diameter of 100 mm and cultured. .
- the medium was replaced with fresh DMEM (Dalbecco's modified Eagle's medium), and 8 ⁇ g of pVSV-G vector (Clontech) and 8 ⁇ g of ⁇ MSCV / G ⁇ AscFv-Fc were added to the GP293 cells by the lipofection method. Introduced.
- the culture supernatant containing the virus particles was collected, and impurities were removed through a 0.45 / zm cellulose acetate filter (manufactured by Advantech). Polypropylene is added to the resulting solution. (Manufactured by Sigma) was added to give 10 ⁇ g Zml to prepare a virus solution.
- the prepared virus solution was added to separately cultured GP293 cells, and after culturing for 48 hours, the cells were cloned by the limiting dilution method to obtain a stable transformed GP293 strain that strongly expresses GFP.
- the obtained stable transformants were cultured in a 100 mm diameter dish so as to be 80% confluent, and 16 / z g of pVSV-G was introduced by a lipofection method. After 48 hours, 12 ml of the culture supernatant containing virus particles was recovered.
- the culture supernatant was centrifuged at 50,000 X g at 4 ° C for 1.5 hours to precipitate a virus.
- the high titer virus vector obtained in this way was 10 8 -10 9 cfuZ ml.
- Virus titer number of cells X dilution ratio X expression ratio (cf uZml)
- Chicken fertilized eggs (Japan Biochemical Laboratory) were used. The time when this fertilized egg was placed in an environment of 37.9 ° C and 65% humidity in an incubator (Model P-008 manufactured by Showa Franchi) with an automatic egg-turning device was taken as the hatching start time (0 hour). After that, hatching was performed every 15 minutes while turning at 90 degrees.
- the eggshell of a fertilized egg was disinfected with 70% ethanol, and the sharp end was cut into a 3.5 cm diameter circle with a diamond cutter (MINOMO7C710, manufactured by Minitar) to expose the embryo.
- a diamond cutter (MINOMO7C710, manufactured by Minitar) to expose the embryo.
- blood vessels were observed on the surface of the yolk, and it could be observed with a stereomicroscope that a part of the blood pulsated and became the heart's primordium.
- a stereomicroscope While observing the initial heart with a stereomicroscope, make a glass pipette (CD-1, Olympus) by micropipette.
- Example 2 With a micro-injector (Transjector 5246, manufactured by Eppendorf) to cut the subblastolar space using a microinjector (Transjector 5246, manufactured by Eppendorf). About 21 of the virus solution prepared in Example 2 was microinjected into the center. After filling the egg shell with the egg white up to the cut end, cover the egg white with a Teflon membrane (Milliwrap, manufactured by Millipore) and poly-Shiidai Biylidene wrap (Saran Wrap, manufactured by Asahi Kasei) using the egg white as a paste, and rotate 90 degrees every 30 minutes. Incubation was carried out while eggs were being laid.
- a Teflon membrane manufactured by Millipore
- Saran Wrap poly-Shiidai Biylidene wrap
- the GO transgenic chimera-pet bird born in Example 3 was bred to grow chicks.
- blood was collected from the subwing vein of the grown male chicks (individual identification numbers # 1111, # 3108, # 4102) to obtain a blood sample.
- the obtained blood was centrifuged at 15, OOO rpm for 10 minutes, and the amount of serum power scFv-Fc antibody obtained as a supernatant was measured.
- An anti-human IgG antibody (manufactured by Cosmo Bio) diluted with PBS was added to an ELISA plate at 100 ⁇ g / well and allowed to stand at 4 ° C. After washing each well three times with 200 ⁇ l of a PBS—0.05% Tween20 solution, PBS / 0.05% Tween20 solution 2% skim milk was added at 150 / zlZwell.
- a standard calibration curve was prepared using purified scFv-Fc.
- the vector construct pMSCVZscFv-Fc prepared in Example 1 was introduced into GP293 cells by the lipofection method, and the culture supernatant was centrifuged at 3000 rpm for 10 minutes at 4 ° C to remove solids. The supernatant was stirred while being cooled, and ammonium sulfate, which had been finely ground to 50% saturation, was gradually added (313 g of ammonium sulfate ZlOOOOml water) to precipitate the protein.
- Binding Buffer 10 ml (flow rate 2 ml Z minute).
- the protein solution dissolved in PBS was flowed for 1 mlZ, and scFv-Fc was adsorbed on the column. Unnecessary proteins are removed by flowing 20 ml of Binding Buffer at 1.7 mlZ, and Elution Buffer (7.507 g / l of glycine, adjusted to pH 2.5-3.0 with 2N HC1) at 1.5 ml / min to remove scFv-Fc Eluted.
- the eluted fraction was dialyzed three times against PBS (2L) to obtain purified scFv-Fc, and the protein concentration was determined from the absorbance at a wavelength of 280nm.
- Table 1 shows the blood antibody levels of the three male GO transgenic chimeric-bird chicks (individual identification numbers # 1111, # 3108, and # 4102) born in Example 3.
- Example 3 Three male GO tigers (individual identification numbers # 1111, # 3108, and # 4102) born in Example 3 Sussienique Chimera- ⁇ Chicken chick ⁇ ! Six months later, 0.2 mL of sperm was collected from the growing male transgenic chimera-Petri by abdominal massage.
- Example 5 a male GO transgenic chimera-petri (# 4102) in which a transgene was detected in sperm was crossed with three wild-type females (white leghorn) to obtain a fertilized egg.
- the fertilized egg was hatched in an incubator (Model P-008, manufactured by Showa Franchi) at 37.9 ° C and 65% humidity in an incubator equipped with an automatic egg turning device.
- an incubator Model P-008, manufactured by Showa Franchi
- chicks were born.
- the chicks were bred for one week, and 100 1 blood was collected from the inferior vein to separate serum, and the amount of antibody in the serum was quantified by the ELISA method of Example 4.
- the genome was extracted from the blood sediment obtained by centrifugation by the method of Example 5, and the transgene was confirmed by PCR.
- a primer set capable of amplifying 355 bp of a part of the GFP gene contained in the transgene: 5, CAACACTGGTCACTACCTTCACCTATG-3, (SEQ ID NO: 15) / 5, one ACGGATCCATCCTCAATGTTGTGTC-3, (SEQ ID NO: 16) was used.
- a primer set capable of amplifying a part of 317 bp of ovalbumin gene contained in -Avian genome: 5, -CGCTTTGATAAACTTCCAGGATTCGG-3, (SEQ ID NO: 17) / 5 '-CATCTAGCTGTCTTGCTTAAGCGTACA-3' (SEQ ID NO: 18) was used.
- the transgene As a result of testing the transgene from 110 chicks, the transgene was detected from 5 chicks. accidental The genome was extracted from each organ of this Gl individual who died suddenly, and the transgene was confirmed by PCR.
- the present method can express a scFv-Fc antibody based on a transgene and produce a complete G1 transgenic bird having the transgene in all somatic cells.
- the 77th chicken bird hatched according to Example 6 was found to be a G1 transgenic-bird (female) by the PCR method of Example 6.
- the individual number of G1 is # 77.
- the 103rd chick was G1 transgenic-Petri (os) by PCR (individual number # 103).
- Blood was collected from the subwings of the two G1 birds, lymphocytes were separated from 2 mL of blood by the Ficoll-pack method, and mitogen (Concanapalin A Cosmonoio), mercaptoethanol (Wako Pure Chemical Industries), Culture using RPMI1640 containing kanamycin sulfate (manufactured by Cosmonio) and 18% FBS (manufactured by Invitrogen) at 37 ° C in a 5% CO atmosphere.
- mitogen Concanapalin A Cosmonoio
- mercaptoethanol Wicoll-pack method
- RPMI1640 containing kanamycin sulfate manufactured by Cosmonio
- 18% FBS manufactured by Invitrogen
- the prepared chromosome specimen was dried for several days, stained with Hoechst 33258 (manufactured by Merck), subjected to UV treatment, dried, and analyzed by the FISH method.
- Probe DNA pMSCV / s cFv-Fc ⁇ BamHl
- piotin Cosmo Bio
- a goat anti-piotin antibody After reacting with ZFITC-anti-goat IgG, imaging with a fluorescence microscope (Leica DMRA system) and analysis with an image analyzer (Leica550CW-QFISH software) were performed.
- the probe DNA (pMSCV / scFv-Fc ⁇ BamHl) was excised from the pMSCV / scFv-Fc of Example 1 with a restriction enzyme treatment to cut out a BamHl-BamHl fragment (1.57kb) and labeled with biotin in a conventional manner. Produced.
- Example 8 G1 # 77 individuals (female) of Example 8 were bred with wild-type oss (white leghorn) and # 103 individuals (oss) were bred with wild-type female (white leghorn) to obtain sperm eggs and hatch.
- Genomes were extracted from the plasma of the chicks by the method of Example 5, and the presence or absence of the transgene was analyzed by PCR to determine whether the chicks were G2 transgenic.
- # 77 is G1 having two copies of the transgene on one chromosome, and it is probable that 3Z4 of chicks born in a cross with a wild type is transgenic. Of these, 1Z4 should have two copies of the transgene, like the G1 parent, and 2Z4 should be G2, which has only one of the transgenes with G1 affinity S.
- Gl # 77 had a blood antibody titer of 0.5-0.8 mgZmL, whereas G2, which was born as a result of mating with the wild type, had a similar blood antibody titer. there were. Also, as shown in Table 3, Gl # 103 had a blood antibody titer of 0.3-0.5 mg Showed similar blood antibody titers in G2. Further, as shown in Table 4, the # 77 G2 female with an average expression level of 0.3 mg ZmL of antibody in egg white expressed the same level of antibody in egg white.
- the transgenic bird of the method of the present invention can be applied as a low-cost protein production plant by using the offspring increased by crossing without generating gene silencing even with generations. It has been demonstrated that this is possible.
- the G1 transgenic bird and its progeny of the present invention must efficiently express a foreign gene introduced by a highly safe replication-defective retrovirus vector without inactivating it. Can be.
- the G1 transgenic bird of the present invention has a transgene in all somatic cells, has stable protein expression at the individual level, and can be a stable supply system as an established strain. .
- the method for producing transgenic birds of the present invention enables safe and efficient production of G1 transgenic birds, and further, G2 and G3 transgenic birds as progeny thereof.
- the Gl, G2, G3-transgenic birds of the present invention express proteins derived from foreign genes in somatic cells, and have been produced by collecting and purifying serum, egg white, and egg yolk caps. An inexpensive production system for proteins and antibodies provided by sugar chains, which was difficult, can be provided.
- FIG. 1 shows the structure of the scFv-Fc antibody expression vector construct pMSCVZG ⁇ AscFv-Fc.
- Amp 1 indicates an ampicillin resistance gene.
- ⁇ act indicates the j8-actin promoter gene.
- ⁇ + indicates a packaging signal sequence.
- GFP represents the green fluorescent protein gene.
- scFv-Fc indicates a scFv-Fc antibody gene.
- 5 'LTR and 3, LTR indicate the long terminal repeat sequence of MoMLV, respectively.
- FIG. 2 shows the results of PCR analysis of a transgene in the extracted genome of each organ of the G1 transgenic- ⁇ bird.
- M indicates a marker
- C1 indicates a positive control
- C2 indicates a negative control.
- L, K, H, MU and I indicate liver, kidney, heart, muscle and intestine, respectively.
- GFP Green indicates the 'fluorescent' protein gene and OVA indicates the ovalbumin gene.
- FIG. 3 shows the results of FISH analysis of G1 transgenic-Petries # 77 and # 103.
- the arrow indicates the transgene (pMSCVZscFv-Fc ⁇ BamHl).
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- Biotechnology (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Environmental Sciences (AREA)
- Veterinary Medicine (AREA)
- Wood Science & Technology (AREA)
- Biomedical Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- Plant Pathology (AREA)
- Biophysics (AREA)
- Animal Behavior & Ethology (AREA)
- Physics & Mathematics (AREA)
- Biodiversity & Conservation Biology (AREA)
- Molecular Biology (AREA)
- Animal Husbandry (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Peptides Or Proteins (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Catching Or Destruction (AREA)
- Toys (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES04820979T ES2380804T3 (es) | 2004-01-08 | 2004-11-05 | Método de construcción de un ave transgénica |
JP2005516799A JPWO2005065450A1 (ja) | 2004-01-08 | 2004-11-05 | 遺伝子導入鳥類及びその作製法 |
AT04820979T ATE540580T1 (de) | 2004-01-08 | 2004-11-05 | Verfahren zur herstellung eines transgenen vogels. |
US10/585,693 US20070214511A1 (en) | 2004-01-08 | 2004-11-05 | Transgenic Bird And Method Of Constructing The Same |
EP04820979A EP1712126B1 (en) | 2004-01-08 | 2004-11-05 | Method of constructing a transgenic bird. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-003045 | 2004-01-08 | ||
JP2004003045 | 2004-01-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005065450A1 true WO2005065450A1 (ja) | 2005-07-21 |
Family
ID=34747068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/016438 WO2005065450A1 (ja) | 2004-01-08 | 2004-11-05 | 遺伝子導入鳥類及びその作製法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070214511A1 (ja) |
EP (1) | EP1712126B1 (ja) |
JP (1) | JPWO2005065450A1 (ja) |
AT (1) | ATE540580T1 (ja) |
ES (1) | ES2380804T3 (ja) |
WO (1) | WO2005065450A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007026772A1 (ja) * | 2005-08-31 | 2007-03-08 | Kaneka Corporation | ネコ由来タンパク質のコード配列を含む外来性遺伝子を含むトランスジェニック鳥類およびその作製法 |
JP2007089578A (ja) * | 2005-08-31 | 2007-04-12 | Kaneka Corp | ネコ由来タンパク質のコード配列を含む外来性遺伝子を含むトランスジェニック鳥類およびその作製法 |
JP2009082033A (ja) * | 2007-09-28 | 2009-04-23 | Kaneka Corp | 完全ヒト型抗体生産法 |
WO2009142186A1 (ja) * | 2008-05-20 | 2009-11-26 | 株式会社カネカ | 細胞障害性組成物 |
JP2013520961A (ja) * | 2010-02-26 | 2013-06-10 | ヴェンタナ メディカル システムズ, インク. | 中期染色体の細胞遺伝学的解析 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2517731C2 (ru) * | 2011-07-08 | 2014-05-27 | Общество с ограниченной ответственностью "Биолайн Центр",RU | Способ получения трансгенных кур опосредованным переносом гена путем обычного искусственного осеменения |
US20140317765A1 (en) * | 2011-09-01 | 2014-10-23 | Synageva Biopharma Corp. | Transgenic birds that produce chimeric human immunoglobulins |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002176880A (ja) * | 2000-12-12 | 2002-06-25 | Kanegafuchi Chem Ind Co Ltd | 効率的な遺伝子導入鳥類の作製法及びそれによって得られる遺伝子導入鳥類 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6825396B2 (en) * | 1996-06-12 | 2004-11-30 | Board Of Trustees Operating Michigan State University | Methods for tissue specific synthesis of protein in eggs of transgenic hens |
ES2357495T3 (es) * | 1997-10-16 | 2011-04-27 | University Of Georgia Research Foundation, Inc. | Aves transgénicas y producción de proteína. |
US20020108132A1 (en) * | 2001-02-02 | 2002-08-08 | Avigenics Inc. | Production of a monoclonal antibody by a transgenic chicken |
JP5468719B2 (ja) * | 2002-08-13 | 2014-04-09 | 株式会社カネカ | レトロウイルスベクターによる遺伝子導入鳥類での遺伝子発現法およびそれによって得られる遺伝子導入烏類 |
GB0227645D0 (en) * | 2002-11-27 | 2003-01-08 | Viragen Inc | Protein production in transgenic avians |
KR20070029103A (ko) * | 2003-08-29 | 2007-03-13 | 카네카 코포레이션 | 렌티바이러스 벡터에 의한 유전자 도입 조류 제조법 및그것에 의해 얻어지는 유전자 도입 조류 |
-
2004
- 2004-11-05 AT AT04820979T patent/ATE540580T1/de active
- 2004-11-05 EP EP04820979A patent/EP1712126B1/en not_active Not-in-force
- 2004-11-05 JP JP2005516799A patent/JPWO2005065450A1/ja active Pending
- 2004-11-05 WO PCT/JP2004/016438 patent/WO2005065450A1/ja active Application Filing
- 2004-11-05 US US10/585,693 patent/US20070214511A1/en not_active Abandoned
- 2004-11-05 ES ES04820979T patent/ES2380804T3/es active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002176880A (ja) * | 2000-12-12 | 2002-06-25 | Kanegafuchi Chem Ind Co Ltd | 効率的な遺伝子導入鳥類の作製法及びそれによって得られる遺伝子導入鳥類 |
Non-Patent Citations (3)
Title |
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KAMIHIRA M. ET AL: "Trangenic Niwatori ni yoru Monoclonal Kotai no Seisan.", THE MOLECULAR BIOLOGY SOCIETY OF JAPANN NENKAI PROGRAM KOEN YOSHISHU, vol. 26, 2003, pages 791, XP002990219 * |
KAMIHIRA M. ET AL: "Transgenic Niwatori ni yoru Ko-hito CD2 Chimera Kotai no Seisan.", THE SOCIETY OF CHEMICAL ENGINEERS, SHUKI TAIKAI KENKYU HAPPYO KOEN YOSHISHU, vol. 36, 2003, pages 781, XP002990218 * |
ONO K. ET AL: "scFv-Fc Yugo Tanpakushitsu o Seisan suru Transgenic Uzura no Sakusei.", THE SOCIETY OF CHEMICAL ENGINEERS, SHUKI TAIKAI KENKYU HAPPYO KOEN YOSHISHU, vol. 36, 2003, pages 780, XP002990217 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007026772A1 (ja) * | 2005-08-31 | 2007-03-08 | Kaneka Corporation | ネコ由来タンパク質のコード配列を含む外来性遺伝子を含むトランスジェニック鳥類およびその作製法 |
JP2007089578A (ja) * | 2005-08-31 | 2007-04-12 | Kaneka Corp | ネコ由来タンパク質のコード配列を含む外来性遺伝子を含むトランスジェニック鳥類およびその作製法 |
US9974288B2 (en) | 2005-08-31 | 2018-05-22 | Kaneka Corporation | Method of making polyethylene glycol-modified mammalian erythropoietin in a transgenic chicken |
JP2009082033A (ja) * | 2007-09-28 | 2009-04-23 | Kaneka Corp | 完全ヒト型抗体生産法 |
WO2009142186A1 (ja) * | 2008-05-20 | 2009-11-26 | 株式会社カネカ | 細胞障害性組成物 |
JPWO2009142186A1 (ja) * | 2008-05-20 | 2011-09-29 | 株式会社カネカ | 細胞障害性組成物 |
JP2013520961A (ja) * | 2010-02-26 | 2013-06-10 | ヴェンタナ メディカル システムズ, インク. | 中期染色体の細胞遺伝学的解析 |
Also Published As
Publication number | Publication date |
---|---|
EP1712126A4 (en) | 2009-08-05 |
ES2380804T3 (es) | 2012-05-18 |
EP1712126B1 (en) | 2012-01-11 |
US20070214511A1 (en) | 2007-09-13 |
JPWO2005065450A1 (ja) | 2007-07-26 |
EP1712126A1 (en) | 2006-10-18 |
ATE540580T1 (de) | 2012-01-15 |
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