CN111088280A - 打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用 - Google Patents
打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用 Download PDFInfo
- Publication number
- CN111088280A CN111088280A CN201911415260.4A CN201911415260A CN111088280A CN 111088280 A CN111088280 A CN 111088280A CN 201911415260 A CN201911415260 A CN 201911415260A CN 111088280 A CN111088280 A CN 111088280A
- Authority
- CN
- China
- Prior art keywords
- dtr
- sign
- ires
- seq
- mouse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013598 vector Substances 0.000 title claims abstract description 57
- 230000008685 targeting Effects 0.000 title claims abstract description 47
- 238000011830 transgenic mouse model Methods 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 title claims abstract description 10
- 210000004443 dendritic cell Anatomy 0.000 title abstract description 63
- 210000001616 monocyte Anatomy 0.000 title abstract description 57
- 102000016607 Diphtheria Toxin Human genes 0.000 title abstract description 34
- 108010053187 Diphtheria Toxin Proteins 0.000 title abstract description 34
- 230000001105 regulatory effect Effects 0.000 title abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 29
- 210000004027 cell Anatomy 0.000 claims description 52
- 241000699666 Mus <mouse, genus> Species 0.000 claims description 42
- 108090000623 proteins and genes Proteins 0.000 claims description 33
- 241000699670 Mus sp. Species 0.000 claims description 29
- 108010037897 DC-specific ICAM-3 grabbing nonintegrin Proteins 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 15
- 241000699660 Mus musculus Species 0.000 claims description 13
- 238000004520 electroporation Methods 0.000 claims description 13
- 241000581650 Ivesia Species 0.000 claims description 12
- 239000013612 plasmid Substances 0.000 claims description 12
- 230000009261 transgenic effect Effects 0.000 claims description 12
- NHBKXEKEPDILRR-UHFFFAOYSA-N 2,3-bis(butanoylsulfanyl)propyl butanoate Chemical compound CCCC(=O)OCC(SC(=O)CCC)CSC(=O)CCC NHBKXEKEPDILRR-UHFFFAOYSA-N 0.000 claims description 11
- 238000010367 cloning Methods 0.000 claims description 11
- 239000012634 fragment Substances 0.000 claims description 10
- 210000001671 embryonic stem cell Anatomy 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 210000002459 blastocyst Anatomy 0.000 claims description 6
- 230000006801 homologous recombination Effects 0.000 claims description 6
- 238000002744 homologous recombination Methods 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 6
- 230000029087 digestion Effects 0.000 claims description 5
- SRBFZHDQGSBBOR-HWQSCIPKSA-N L-arabinopyranose Chemical compound O[C@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-HWQSCIPKSA-N 0.000 claims description 4
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 claims description 4
- 239000003550 marker Substances 0.000 claims description 4
- 210000004291 uterus Anatomy 0.000 claims description 4
- IRSCQMHQWWYFCW-UHFFFAOYSA-N ganciclovir Chemical compound O=C1NC(N)=NC2=C1N=CN2COC(CO)CO IRSCQMHQWWYFCW-UHFFFAOYSA-N 0.000 claims description 3
- 229960002963 ganciclovir Drugs 0.000 claims description 3
- 102000004190 Enzymes Human genes 0.000 claims description 2
- 108090000790 Enzymes Proteins 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims description 2
- 238000010171 animal model Methods 0.000 abstract description 11
- 230000006698 induction Effects 0.000 abstract description 6
- 238000007086 side reaction Methods 0.000 abstract description 2
- 108020004414 DNA Proteins 0.000 description 26
- 239000002609 medium Substances 0.000 description 17
- 241000588724 Escherichia coli Species 0.000 description 15
- 102000018710 Heparin-binding EGF-like Growth Factor Human genes 0.000 description 8
- 101800001649 Heparin-binding EGF-like growth factor Proteins 0.000 description 8
- 238000012408 PCR amplification Methods 0.000 description 8
- 239000006285 cell suspension Substances 0.000 description 8
- 229960005091 chloramphenicol Drugs 0.000 description 8
- WIIZWVCIJKGZOK-RKDXNWHRSA-N chloramphenicol Chemical compound ClC(Cl)C(=O)N[C@H](CO)[C@H](O)C1=CC=C([N+]([O-])=O)C=C1 WIIZWVCIJKGZOK-RKDXNWHRSA-N 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 210000002993 trophoblast Anatomy 0.000 description 6
- 230000006907 apoptotic process Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000000684 flow cytometry Methods 0.000 description 5
- 210000001165 lymph node Anatomy 0.000 description 5
- 238000012216 screening Methods 0.000 description 5
- 210000001519 tissue Anatomy 0.000 description 5
- 229930193140 Neomycin Natural products 0.000 description 4
- 108091028043 Nucleic acid sequence Proteins 0.000 description 4
- 238000000246 agarose gel electrophoresis Methods 0.000 description 4
- 238000009395 breeding Methods 0.000 description 4
- 230000001488 breeding effect Effects 0.000 description 4
- 238000001976 enzyme digestion Methods 0.000 description 4
- 229960004927 neomycin Drugs 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- UCSJYZPVAKXKNQ-HZYVHMACSA-N streptomycin Chemical compound CN[C@H]1[C@H](O)[C@@H](O)[C@H](CO)O[C@H]1O[C@@H]1[C@](C=O)(O)[C@H](C)O[C@H]1O[C@@H]1[C@@H](NC(N)=N)[C@H](O)[C@@H](NC(N)=N)[C@H](O)[C@H]1O UCSJYZPVAKXKNQ-HZYVHMACSA-N 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 239000003053 toxin Substances 0.000 description 4
- 231100000765 toxin Toxicity 0.000 description 4
- 108700012359 toxins Proteins 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 101001046686 Homo sapiens Integrin alpha-M Proteins 0.000 description 3
- 102100022338 Integrin alpha-M Human genes 0.000 description 3
- 102100022297 Integrin alpha-X Human genes 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000004098 Tetracycline Substances 0.000 description 3
- 238000012258 culturing Methods 0.000 description 3
- 239000001963 growth medium Substances 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007928 intraperitoneal injection Substances 0.000 description 3
- 238000010172 mouse model Methods 0.000 description 3
- 229960002180 tetracycline Drugs 0.000 description 3
- 229930101283 tetracycline Natural products 0.000 description 3
- 235000019364 tetracycline Nutrition 0.000 description 3
- 150000003522 tetracyclines Chemical class 0.000 description 3
- 239000006144 Dulbecco’s modified Eagle's medium Substances 0.000 description 2
- 102000009109 Fc receptors Human genes 0.000 description 2
- 108010087819 Fc receptors Proteins 0.000 description 2
- 102000004058 Leukemia inhibitory factor Human genes 0.000 description 2
- 108090000581 Leukemia inhibitory factor Proteins 0.000 description 2
- 210000000612 antigen-presenting cell Anatomy 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 210000001185 bone marrow Anatomy 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002299 complementary DNA Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012154 double-distilled water Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 210000002950 fibroblast Anatomy 0.000 description 2
- 230000002779 inactivation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 210000005259 peripheral blood Anatomy 0.000 description 2
- 239000011886 peripheral blood Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- DAEPDZWVDSPTHF-UHFFFAOYSA-M sodium pyruvate Chemical compound [Na+].CC(=O)C([O-])=O DAEPDZWVDSPTHF-UHFFFAOYSA-M 0.000 description 2
- 229960005322 streptomycin Drugs 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 description 1
- 108090000342 C-Type Lectins Proteins 0.000 description 1
- 102000003930 C-Type Lectins Human genes 0.000 description 1
- 238000011746 C57BL/6J (JAX™ mouse strain) Methods 0.000 description 1
- 101100386719 Caenorhabditis elegans dcs-1 gene Proteins 0.000 description 1
- 241000186227 Corynebacterium diphtheriae Species 0.000 description 1
- 238000007400 DNA extraction Methods 0.000 description 1
- 208000005189 Embolism Diseases 0.000 description 1
- 102000004457 Granulocyte-Macrophage Colony-Stimulating Factor Human genes 0.000 description 1
- 108010017213 Granulocyte-Macrophage Colony-Stimulating Factor Proteins 0.000 description 1
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 1
- 108010064600 Intercellular Adhesion Molecule-3 Proteins 0.000 description 1
- 102100037871 Intercellular adhesion molecule 3 Human genes 0.000 description 1
- 108090000978 Interleukin-4 Proteins 0.000 description 1
- 238000012449 Kunming mouse Methods 0.000 description 1
- ZDXPYRJPNDTMRX-VKHMYHEASA-N L-glutamine Chemical compound OC(=O)[C@@H](N)CCC(N)=O ZDXPYRJPNDTMRX-VKHMYHEASA-N 0.000 description 1
- 229930182816 L-glutamine Natural products 0.000 description 1
- 102000003960 Ligases Human genes 0.000 description 1
- 108090000364 Ligases Proteins 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 101100246038 Mus musculus Ptpn5 gene Proteins 0.000 description 1
- 241000283984 Rodentia Species 0.000 description 1
- 201000006490 Spondylolysis Diseases 0.000 description 1
- 210000001744 T-lymphocyte Anatomy 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004113 cell culture Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000012136 culture method Methods 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 206010013023 diphtheria Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003797 essential amino acid Substances 0.000 description 1
- 235000020776 essential amino acid Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 210000004602 germ cell Anatomy 0.000 description 1
- 239000003102 growth factor Substances 0.000 description 1
- 230000010005 growth-factor like effect Effects 0.000 description 1
- 230000037308 hair color Effects 0.000 description 1
- 210000003958 hematopoietic stem cell Anatomy 0.000 description 1
- 229960002897 heparin Drugs 0.000 description 1
- 229920000669 heparin Polymers 0.000 description 1
- 230000028993 immune response Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 102000006495 integrins Human genes 0.000 description 1
- 108010044426 integrins Proteins 0.000 description 1
- 210000001821 langerhans cell Anatomy 0.000 description 1
- 210000003738 lymphoid progenitor cell Anatomy 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 210000003643 myeloid progenitor cell Anatomy 0.000 description 1
- 102000007863 pattern recognition receptors Human genes 0.000 description 1
- 108010089193 pattern recognition receptors Proteins 0.000 description 1
- 239000013600 plasmid vector Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000010837 receptor-mediated endocytosis Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 229940054269 sodium pyruvate Drugs 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000014616 translation Effects 0.000 description 1
- 210000003905 vulva Anatomy 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- 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
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/85—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells
- C12N15/8509—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells for producing genetically modified animals, 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
- A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
- A01K67/027—New or modified breeds of vertebrates
- A01K67/0275—Genetically modified vertebrates, e.g. transgenic
- A01K67/0278—Knock-in vertebrates, e.g. humanised vertebrates
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- 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
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/65—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression using markers
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- 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
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/66—General methods for inserting a gene into a vector to form a recombinant vector using cleavage and ligation; Use of non-functional linkers or adaptors, e.g. linkers containing the sequence for a restriction endonuclease
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- 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
- C12N15/87—Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation
- C12N15/873—Techniques for producing new embryos, e.g. nuclear transfer, manipulation of totipotent cells or production of chimeric embryos
- C12N15/877—Techniques for producing new mammalian cloned embryos
- C12N15/8775—Murine embryos
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- 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
- C12N15/87—Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation
- C12N15/89—Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation using microinjection
-
- 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
- A01K2207/00—Modified animals
- A01K2207/15—Humanized animals
-
- 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
- A01K2217/07—Animals genetically altered by homologous recombination
- A01K2217/072—Animals genetically altered by homologous recombination maintaining or altering function, i.e. knock in
-
- 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
- A01K2227/10—Mammal
- A01K2227/105—Murine
-
- 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
- A01K2267/03—Animal model, e.g. for test or diseases
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2800/00—Nucleic acids vectors
- C12N2800/30—Vector systems comprising sequences for excision in presence of a recombinase, e.g. loxP or FRT
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Genetics & Genomics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Zoology (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Wood Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biomedical Technology (AREA)
- General Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Biophysics (AREA)
- Physics & Mathematics (AREA)
- Microbiology (AREA)
- Plant Pathology (AREA)
- Veterinary Medicine (AREA)
- Environmental Sciences (AREA)
- Developmental Biology & Embryology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Animal Husbandry (AREA)
- Animal Behavior & Ethology (AREA)
- Toxicology (AREA)
- Gastroenterology & Hepatology (AREA)
- Medicinal Chemistry (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
本发明涉及动物模型构建领域,公开了一种打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用,本发明克服了现有树突状细胞清除动物模型的不足,提供了一种能稳定传代的新型可诱导型的、白喉毒素调控清除单核细胞衍生DC的DC SIGN‑DTR转基因小鼠动物模型的制备、使用和检测方法。本发明构建得到的白喉毒素调控清除单核细胞衍生DC的DCSIGN‑DTR转基因小鼠动物模型单核细胞衍生DC清除效率达80%‑90%,能够较好地清除单核细胞衍生DC,且在不用白喉毒素诱导时单核细胞衍生DC功能不受影响,利用白喉毒素诱导清除单核细胞衍生DC时无副反应,提供了一种全新的单核细胞衍生DC清除的原理和方法,提供了一种全新的单核细胞衍生DC可诱导清除的动物模型。
Description
技术领域
本发明涉及动物模型构建领域,更具体地,涉及一种打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用。
背景技术
树突状细胞(dendritic cells,MDC)是目前所知的机体内功能最强的抗原提呈细胞,是唯一能激活未致敏的初始T细胞的抗原体提呈细胞,是启动、调控、并维持免疫应答中心。树突状细胞起源于骨髓中的造血干细胞,一方面髓样干细胞可以分化为髓样DC,又称DC1,包括朗格汉斯细胞,间质DC以及单核细胞衍生DC;另一方面,淋巴样干细胞可以分化为淋巴样DC,又称DC2。当外周血中的单核细胞可以在GM-CSF和IL-4的刺激下分化为DC,组织中处于稳态的DC能自我更新,而不需要单核细胞衍生DC的补充。在外周血和骨髓中,单核细胞的数量大约是DC的20倍,并且单核细胞衍生DC作为DC的一个主要部分,其功能是不能被忽视的。为了研究单核细胞衍生DC的功能,一个重要的实验就是在体内清除单核细胞衍生DC,然而现在未有能够特异性清除单核细胞衍生DC的动物模型,所以开发能够特异性清除单核细胞衍生DC的动物模型具有重要作用。
白喉毒素受体-白喉毒素(DTR-DT)系统是近年来发展起来的一种用于诱导特定细胞群凋亡的系统。白喉毒素(DT)是白喉棒状杆菌产生的一种毒素,包含A和B两个亚基,而白喉毒素受体(DTR)又称人类肝素结合的表皮生长因子样生长因子(hbEGF)。当DT通过B亚基与DTR结合时,整个毒素将通过受体介导的内吞作用内化,毒素的亚单位A随后可抑制蛋白质的翻译,导致细胞凋亡而死亡。啮齿类动物的hbEGF因为3个氨基酸的变化,对DT的亲和力比人类低103-105倍,所以给小鼠注射DT可以特异性诱导表达DTR(即人类hbEGF)的细胞群体凋亡,从而特异性清除该细胞群体,并且无明显副反应。
树突状细胞特异性细胞间黏附分子-3结合非整合素因子(dendritic cellspecific intercellular-adherison-molecular-3grabbing non-integr,DC-SIGN)是一种主要表达于DC表面的模式识别受体,属于C型凝集素超分子家族。所以我们选择DC-SIGN作为驱动DTR表达的基因构建转基因小鼠,这样在表达DC-SIGN的单核细胞衍生DC中会表达DTR,而不表达DC-SIGN的组织中自我更新DC或其他非DC细胞中不表达DTR,注射合适剂量的DT就可以选择性地诱导单核细胞衍生DC凋亡。
发明内容
本发明所要解决的技术问题是为了克服现有的树突状细胞清除动物模型的不足,提供一种打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用。
本发明的目的是提供一种靶向整合外源基因IRES-DTR至DC-SIGN外显子7位点,构建白喉毒素调控清除单核细胞衍生树突状细胞的DC SIGN-DTR转基因小鼠的方法和应用。
本发明上述目的通过以下技术方案予以实现:一种带小鼠DC-SIGN长同源臂的整合外源基因IRES-DTR的打靶载体,所述靶向打靶载体序列如SEQ ID NO.8所示,命名为pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HAL-MCL-HSV TK。
一种提取载体,所述提取载体序列如SEQ ID NO.7所示,命名为载体pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK。
S1.构建带长同源臂的靶向整合外源基因IRES-DTR至DC-SIGN外显子7位点的打靶载体,命名为打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK;
S2.电穿孔法将酶切线性化的打靶载体导入小鼠胚胎干细胞BALB/C ES细胞,得到靶向插入IRES-DTR至DC-SIGN外显子7位点的BALB/C ES细胞;
S3.利用靶向插入IRES-DTR至DC-SIGN外显子7位点的BALB/C ES细胞,囊胚注射法构建靶向插入IRES-DTR至DC-SIGN外显子7位点的DC SIGN-DTR转基因小鼠;
其中S1步骤所述构建带长同源臂的靶向整合外源基因IRES-DTR至DC-SIGN外显子7位点的打靶载体的具体方法如下:
(1)以RP23-12K14 BAC DNA为模板,利用序列如SEQ ID NO.1所示的正向引物和序列如SEQ ID NO.2所示的反向引物进行PCR,扩增出序列如SEQ ID NO.3所示的基因片段DC-SIGN 5’侧同源臂(retrieval 5HA);以RP23-12K14 BAC DNA为模板,利用序列如SEQ IDNO.4所示的正向引物和序列如SEQ ID NO.5所示的反向引物进行PCR,扩增出序列如SEQ IDNO.6所示的基因片段DC-SIGN 3’侧同源臂(retrieval 3HA);
(2)将retrieval 5HA和retrieval 3HA利用酶切位点NotI、SpeI、BamHI克隆至带阴性选择标记HSV TK的载体pL253-retrivied-empty(counter-Selection BACModification Kit,Genebridges),得到序列如SEQ ID NO.7所示的提取载体pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK;
(3)电穿孔法将质粒pRED/ET转化入BAC Clone DCSIGN-IRES-DTR-PEN(由本实验室构建,正在申报专利,部分基因结构如附图1所示),并用L-阿拉伯糖诱导Red/ET表达;
(4)电穿孔法将利用SpeI酶切线性化的pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK提取载体转化入上述表达RED/ET的BAC Clone DC SIGN-IRES-DTR-PEN,同源重组得到序列如SEQ ID NO.8所示的带有DC-SIGN 5’同源臂(~2kb)和3’同源臂(~20kb)的打靶载体,命名为打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSVTK;
(5)挑选单克隆,利用序列如SEQ ID NO.9所示的正向引物和序列如SEQ ID NO.10所示的反向引物作菌落PCR,成功提取IRES-DTR-PGK-EM7-NEO和DC-SIGN同源臂的载体能够得到约1.2kb的条带。
至此,我们得到打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK。
上述打靶载体可用于靶向整合外源基因IRES-DTR至DC-SIGN外显子7位点,如小鼠胚胎干(ES)细胞DC-SIGN外显子7位点。
本发明还提供利用上述打靶载体靶向整合外源基因IRES-DTR至小鼠胚胎干细胞DC-SIGN外显子7位点的方法,即步骤S2。具体步骤如下:
(1)小鼠胚胎成纤维细胞(MEFs)用MEF培养基培养,经30Grayγ射线灭活处理后作为滋养层细胞。BALB/C ES细胞(以下简述为ES细胞)种在滋养层细胞上,用ES培养基培养;
(2)电穿孔法将利用NotI酶切线性化的打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK转入ES细胞,使IRES-DTR-PGK-EM7-NEO同源重组至DC-SIGN外显子7位点;
(3)利用G418阳选和ganciclovir阴选,挑选得到靶向插入IRES-DTR-PGK-EM7-NEO至DC-SIGN外显子7位点的BALB/C ES细胞克隆;
(4)提取ES细胞基因组DNA为模板,利用序列为SEQ ID NO.11的正向引物和序列为SEQ ID NO.12的反向引物进行PCR鉴定,靶向插入IRES-DTR-PGK-EM7-NEO至DC-SIGN外显子7位点的ES细胞阳性克隆可见约4.1kb条带。
至此,我们得到靶向插入IRES-DTR至DC-SIGN外显子7位点的BALB/C ES细胞。
上述靶向插入IRES-DTR至DC-SIGN外显子7位点的ES细胞可用于培育DC SIGN-DTR转基因小鼠。
本发明还提供利用上述靶向插入IRES-DTR至DC-SIGN外显子7位点的ES细胞培育DC SIGN-DTR转基因小鼠的方法,即步骤S3。具体步骤如下:
(1)靶向插入IRES-DTR至DC-SIGN外显子7位点的ES细胞注射入C57BL/6J囊胚,再接种到假孕的KM母鼠子宫中,出生得到毛色为黑色和白色混杂嵌合体小鼠;
(2)提取转基因小鼠鼠尾DNA作为模板,利用序列为SEQ ID NO.13的正向引物和序列为SEQ ID NO.14的反向引物作PCR鉴定,带有IRES-DTR的阳性小鼠可见约1.2kb条带;
(3)利用白色占比最高的5只雄性转基因嵌合体小鼠(F0)与BALB/c雌鼠交配,得到毛色为白色的小鼠可能为DC SIGN-DTR转基因杂合小鼠。小白鼠经鼠尾PCR鉴定后得到DCSIGN-DTR转基因杂合小鼠,即为F1代小鼠,鼠尾PCR鉴定方法同步骤(2)。
(4)F1代小鼠与C57BL/6J母鼠杂交进行传代、培育,同时对所得的子代小鼠进行鼠尾PCR鉴定,方法同步骤(2),得到F2代小鼠。按相同方法对小鼠进行传代。
至此,我们得到DC SIGN-DTR转基因小鼠。
上述DC SIGN-DTR转基因小鼠可用白喉毒素诱导,建立清除单核细胞衍生DC的小鼠模型。
本发明还提供利用上述DC SIGN-DTR转基因小鼠,经白喉毒素诱导建立清除单核细胞衍生DC的小鼠模型的方法。
白喉毒素调控清除单核细胞衍生DC的DC SIGN-DTR转基因小鼠模型使用方法:因单核细胞衍生DC表达DC-SIGN,故DC SIGN-DTR转基因小鼠的单核细胞衍生DC也表达DTR,白喉毒素(DT)能够结合DTR,特异性诱导单核细胞衍生DC凋亡,从而清除单核细胞衍生DC。优选地,在第1、第2、第4、第7天分别腹腔注射DT(20ng/g),特异性清除小鼠单核细胞衍生DC。
本发明还提供利用流式细胞术检测小鼠组织中单核细胞衍生DC敲除效率的方法。
利用流式细胞术检测小鼠组织中单核细胞衍生DC:获取小鼠组织,制备成单细胞悬液,用Fc blocker封闭Fc受体后,利用CD11c、MHCII、CD11b流式抗体染色,其中CD11c、MHCII、CD11b均高表达的细胞为单核细胞衍生DC。
至此,本发明提供了白喉毒素调控清除单核细胞衍生DC的DC SIGN-DTR转基因小鼠制备、使用和检测方法。
本发明的有益效果为:
本发明克服了现有树突状细胞清除动物模型的不足,提供了一种能稳定传代的新型可诱导型的、白喉毒素调控清除单核细胞衍生DC的DC SIGN-DTR转基因小鼠动物模型的制备、使用和检测方法。
本发明建立了一种高效、安全靶向整合外源基因至小鼠胚胎干细胞基因组DC-SIGN外显子7位点的方法,并证实敲入的外源基因表达正常。
本发明提供了靶向小鼠DC-SIGN外显子7位点的打靶载体左、右同源臂DNA序列信息及构建方法。
本发明提供了筛选与鉴定阳性细胞株/克隆的方法和应用实例。
本发明提供了利用转基因ES细胞生产和培育转基因小鼠的方法和应用实例。
本发明构建得到的白喉毒素调控清除单核细胞衍生DC的DCSIGN-DTR转基因小鼠动物模型单核细胞衍生DC清除效率达80%-90%,能够较好地清除单核细胞衍生DC,且在不用白喉毒素诱导时单核细胞衍生DC功能不受影响,利用白喉毒素诱导清除单核细胞衍生DC时无副反应,提供了一种全新的单核细胞衍生DC清除的原理和方法,提供了一种全新的单核细胞衍生DC可诱导清除的动物模型。
附图说明
图1:外显子7位点插入IRES-DTR-PGK-EM7-Neo的BAC Clone DCSIGN-IRES-DTR-PEN的DCSIGN基因部分结构示意图,黑色片段代表外显子位点;
图2:带长同源臂的靶向DC-SIGN基因外显子7位点的打靶载体的构建,及同源重组从DC-SIGN BAC提取长同源臂和目的基因后进行PCR筛选与鉴定的引物(黑色箭头)示意图;
图3:靶向整合外源基因IRES-DTR至小鼠胚胎干细胞DC-SIGN外显子7位点,及PCR筛选与鉴定阳性克隆的引物(黑色箭头)示意图;
图4:PCR筛选与鉴定靶向DC-SIGN外显子7位点的小鼠胚胎干细胞单克隆,正确靶向的单克隆细胞出现约4.1kb条带;
图5:利用靶向插入IRES-DTR至DC-SIGN外显子7位点的ES细胞培育DC SIGN-DTR转基因小鼠流程图;
图6:DC SIGN-DTR转基因小鼠(F1)PCR鉴定结果图;
图7:DC SIGN-DTR转基因小鼠腹腔注射DT特异性清除小鼠单核细胞衍生DC的流式细胞术检测敲除效率结果图。
具体实施方式
实施例1:构建带长同源臂的靶向整合外源基因IRES-DTR至DC-SIGN外显子7位点的打靶载体。
从genome.ucsc.edu网站检索并下载获得小鼠DC-SIGN基因组序列,结合小鼠DC-SIGN(Genbank No:NM_133238.5)序列,确定各外显子和内含子位置及序列。包含整个DC-SIGN基因的BAC Clone:RP23-12K14从Chieldren’hospotal Oakland Research Institute购买获得,BAC DNA 利用HiPure Plasmid Filter Maxiprep Kit(Invitrogen)制备备用。
PCR扩增目的基因片段DC-SIGN 5’侧同源臂(retrieval 5HA)和DC-SIGN 3’侧同源臂(retrieval 3HA):以RP23-12K14 BAC DNA为模板,利用正向引物DCSIGN-5HA-F(NotI)-ACCACCGCGGCCGCACATCTGCCCATAGCACACAG(SEQ ID NO.1)和反向引物DCSIGN-5HA-R(SpeI)-ACCACCACTAGTAGCATCAGGAGGGAGCTCTAC(SEQ ID NO.2)作PCR扩增DC-SIGN5’侧同源臂(retrieval 5HA)(SEQ ID NO.3);以RP23-12K14 BAC DNA为模板,利用正向引物DCSIGN-3HA-F(SpeI)-ACCACCACTAGTTGTTTGCTCCTTTCTGACCAG(SEQ ID NO.4)和反向引物DCSIGN-3HA-R(BamHI)-ACCACCGGATCCGCATAGACTCTTGATGGTGCATATT(SEQ ID NO.5)作PCR扩增DC-SIGN 3’侧同源臂(retrieval 3HA)(SEQ ID NO.6)。下划线序列为酶切位点。
表1:PCR反应体系如下:
表2:PCR扩增条件如下:
将retrieval 5HA和retrieval 3HA克隆至带阴性选择标记基因的载体pL253-retrivied-empty:retrieval 5HA用NotI、SpeI(NEB)双酶切,retrieval 3HA用SpeI、BamHI(NEB)双酶切,带阴性选择标记基因的载体pL253-retrivied-empty(counter-SelectionBAC Modification Kit(Genebridges,USA))用NotI、BamHI(NEB)双酶切。酶切的PCR产物经AxyPrep PCR Clean-Up Kit(Axygen)纯化回收,酶切的质粒载体经琼脂糖凝胶电泳分离后切出目的条带并利用AxyPrep DNA Gel Extraction Kit(Axygen)回收。利用T4 DNAligase(NEB)将载体与目的片段连接,接着转化至大肠杆菌DH5α,挑取单个菌落培养,提取质粒DNA,经酶切初步鉴定后送商业公司测序。测序结果显示retrieval 5HA和retrieval3HA插入成功并命名为提取载体pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK,载体序列如SEQ ID NO.7所示。
电穿孔法将质粒pRed/ET转化入BAC Clone DCSIGN-IRES-DTR-PEN:BAC Clone DCSIGN-DCSIGN-IRES-DTR-PEN(本实验室构建,正在申报专利)是将外源基因IRES-DTR-PGK-EM7-Neo靶向插入包含整个小鼠DC-SIGN基因的BAC Clone RP23-12K14得到,部分基因结构如附图1所示。将BAC Clone DCSIGN-IRES-DTR-PEN接种于含氯霉素(15μg/mL)、新霉素(15μg/mL)的LB平板,37℃培养16h。挑选1个克隆于有1mL LB培养基(含15μg/mL氯霉素,15μg/mL新霉素)的2mL离心管(盖子上戳一个洞使能够通气),37℃200rpm培养过夜。取30μL培养过夜的大肠杆菌克隆于有1.4mL LB培养基(含15μg/mL氯霉素,15μg/mL新霉素)的2mL离心管,37℃1000RPM,培养2-3h扩增得对数期的大肠杆菌。扩增的大肠杆菌2℃11000rpm离心30s,吸弃上清。大肠杆菌沉淀用1mL冰上预冷的ddH20清洗3遍,最后留下约30μL ddH2O重悬大肠杆菌,加入1μL pRed/ET(20ng/μL,counter-Selection BAC Modification Kit(Genebridges,USA)),轻弹混匀,冰上静置。转移大肠杆菌悬液至冰上预冷的1mm电穿孔管,利用Electroporator 2510进行电穿孔,1350V 10μF 600 Ohms,将pRed/ET转化入BAC Clone DCSIGN-IRES-DTR-PEN。用1mL无抗生素LB培养基重悬大肠杆菌并转移至2mL离心管,30℃1000rpm培养70min使抗性基因表达。
L-阿拉伯糖诱导Red/ET表达:取100μL转入pRed/ET并诱导抗性基因表达的大肠杆菌于含四环素(3μg/mL)、氯霉素(15μg/mL)、新霉素(15μg/mL)的LB平板,涂布均匀,30℃避光培养16h。挑取1个单克隆于有1mL LB培养基(含3μg/mL四环素,15μg/mL氯霉素)的2mL盖子戳洞的离心管,30℃200rpm培养过夜。取30μL大肠杆菌于1个有1mL LB培养基(含3μg/mL四环素,15μg/mL氯霉素)的2mL盖子戳洞的离心管,30℃1100rpm培养2h,直到OD600大约0.3。加入50μL L-阿拉伯糖至终浓度为0.3-0.4%,37℃200rpm培养45-60min,诱导Red/ET表达。
电穿孔法将线性化的提取载体pL253-retrieval 5HA-retrieval 3HA-MCL-HSVTK转化入带pRED/ET的DCSIGN-IRES-DTR-PEN BAC Clone:表达Red/ET的大肠杆菌进行离心,2℃11000rpm 30s,吸弃上清。大肠杆菌沉淀用1mL冰上预冷的ddH20清洗3遍,最后留下约30μL ddH2O重悬大肠杆菌,加入1-2μl(100-200ng)用SpeI(NEB)酶切线性化的提取载体pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK,轻弹混匀,冰上静置。转移大肠杆菌悬液至冰上预冷的1mm电穿孔管,利用Electroporator 2510进行电穿孔,1350V10μF 600Ohms,将线性化的提取载体pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK转化入BAC Clone DCSIGN-IRES-DTR-PEN。用1mL无抗生素LB培养基重悬大肠杆菌并转移至2mL离心管,30℃1000rpm培养70min使IRES-DTR-PGK-EM7-NEO及两侧长同源臂被同源重组提取至pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK,得到带有DC-SIGN 5’同源臂(~2kb)和3’同源臂(~20kb)的打靶载体,命名为pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK,序列如SEQ ID NO.8所示。取100μL大肠杆菌于含氯霉素(15μg/mL)的LB平板,涂布均匀,37℃培养过夜,pRed/ET在37℃时会丢失。
筛选和鉴定得到的含长同源臂的打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK:挑选10个单克隆分别于有10μl ddH2O的1.5mL离心管,吹打混匀。取1μl菌液作为模板,利用正向引物DCSIGN-F-CAGAGGAAACCTTTTAGAAGTTGG(SEQ IDNO.9)和反向引物MCL-R-CCACACTGCTCGACTCTAGAGG(SEQ ID NO.10)作菌落PCR,剩余菌液4℃保存备用。
表3:菌落PCR反应体系如下:
表4:菌落PCR反应条件如下:
PCR产物经1%琼脂糖凝胶电泳鉴定,成功提取IRES-DTR-PGK-EM7-NEO及两侧长同源臂的大肠杆菌BAC阳性克隆可见约1.2kb条带。阳性克隆用含氯霉素(15μg/mL)的LB培养基扩增,用HiPure Plasmid Filter Maxiprep Kit(Invitrogen)制备pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK备用。阳性BAC克隆菌液可离心后去上清,用20%甘油的LB培养基重悬,-80℃保存。
实施例2:制备靶向插入IRES-DTR至DC-SIGN外显子7位点的小鼠胚胎干(ES)细胞
小鼠胚胎成纤维细胞(MEFs)培养:MEFs(ATCC)培养和维持于MEF培养基,适时传代和冻存。MEF培养基为DMEM培养基加入10%FBS、100U/ml青链霉素、0.05mM 2巯基乙醇、2mML-谷氨酰胺。
Balb/c ES细胞培养:MEFs细胞使用前用30Grayγ射线灭活处理作为滋养层细胞,将Balb/c ES细胞(Merck)接种至灭活的MEFs上,用ES培养基培养和维持。ES细胞长至70%丰度以1:3比例传代。ES培养基为DMEM培养基加入15%FBS、100U/ml青链霉素、1mM丙酮酸钠、0.1mM非必需氨基酸、0.05mM 2巯基乙醇、2mM L-谷氨酰胺、1μg/L白血病抑制因子(LIF)。
ES细胞电转:ES细胞经胰酶消化收集后,经PBS清洗1次,用电转缓冲液重悬(Millipore),调整细胞密度至0.5X107/ml。打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK经NotI酶切线性化,将50μg线性化的打靶载体加入0.6mL上述ES细胞悬液,并转移至Eppendorf电转仪配套电转杯中,室温静置5min。利用Electroporator 2510电转仪320V 500μF电转,取出电转杯室温放置5min。转移至含30ml培养液的50ml离心管中混匀,再均匀分配至事先准备好含滋养层细胞的3个10cm培养皿中,37℃5%CO2培养箱中培养。
靶向插入IRES-DTR至DC-SIGN外显子7位点的ES细胞的筛选和鉴定:电转后的ES细胞在24小时后,换成含800μg/ml G418和200μM ganciclovir培养液,此后每天更换含药物的培养液。连续药物处理7天后,在尼康SMZ1500显微镜下用特制吸管挑取胚胎干细胞单克隆并转移至事先准备好的含滋养层细胞及培养液的48孔培养板中,每种打靶载体各挑取12个左右单克隆,于37℃5%CO2培养箱中培养。24小时后,用胰酶消化挑取的单克隆细胞并转移至新的事先准备好的含滋养层细胞及培养液的48孔培养板中,于37℃5%CO2培养箱中培养3-4天,每天换液。待单克隆细胞长至80%丰度,细胞经胰酶消化后,将细胞悬液均分转移至事先准备好的含滋养层细胞及培养液的24孔培养板中,并于37℃5%CO2培养箱中培养。待细胞丰度达70%,消化和收集ES细胞,利用QIAamp DNA Mini Kit(Qiagen)提取基因组DNA。以提取的小鼠ES细胞基因组DNA为模板,利用正向引物ES-screen-F-AATGAAGAGAAAGTGAAGTTGGGC(SEQ ID NO.11)和反向引物ES-screen-R-TGCACAAGAGTGAATGAGGTG(SEQ ID NO.12)进行PCR扩增。
表5:PCR反应体系如下:
表6:PCR扩增条件为:
PCR产物经1%琼脂糖凝胶电泳鉴定,靶向插入IRES-DTR至DC-SIGN外显子7位点的ES细胞阳性克隆可见约4.1kb条带,如附图4所示。阳性克隆ES细胞消化后用胚胎干细胞冻存液(Millipore)重悬,-80℃冻存备用。
实例3:繁育靶向插入IRES-DTR至DC-SIGN外显子7位点的DC SIGN-DTR转基因小鼠
囊胚注射ES细胞获得DC SIGN-DTR转基因嵌合体小鼠:选8周龄发育良好的C57BL/6J公鼠,与C57BL/6J母鼠按1:2合笼,次日清晨挑选阴栓阳性母鼠,若母鼠怀孕5天后可在子宫取得囊胚。将结扎KM公鼠与正常KM母鼠按1:2合笼,选取有阴栓且阴门肿胀、红润的母鼠,即为假孕KM母鼠。将靶向插入IRES-DTR至DC-SIGN外显子7位点的ES细胞注射到C57BL/6J小鼠囊胚中,再接种到假孕的KM母鼠子宫中,出生得到嵌合体小鼠(F0),即C57来源的细胞和BALB/c来源的ES细胞共同存在于同一个体中,表现为动物毛色为黑色和白色混杂。
提取小鼠鼠尾DNA方法:小鼠鼠尾置于1.5mL离心管,加入300μL NaOH溶液(50mM),金属浴100℃30min。冷却至室温,加入30μL Tris-HCl(1M,pH6.8)混匀调节pH。10000g离心1min,上清即为含小鼠鼠尾DNA的溶液,可直接用于PCR。
鼠尾PCR鉴定转基因嵌合体小鼠:以转基因小鼠鼠尾DNA作为模板,利用正向引物DCSIGN-screen-F-CCAATCAAGGTGGAGAATGTC(SEQ ID NO.13)和反向引物DCSIGN-screen-R-AGACCCCTAGGAATGCTCGT(SEQ ID NO.14)作PCR扩增,PCR反应体系同表5,PCR扩增条件同表6。PCR产物经1%琼脂糖凝胶电泳鉴定,插入IRES-DTR的阳性小鼠可见约1.2kb条带。
繁育DC SIGN-DTR转基因小鼠:白色占比越高的嵌合体小鼠,ES细胞发育成生殖细胞的可能性越大,利用白色占比最高的5只雄性转基因嵌合体小鼠与BALB/c雌鼠交配,得到的DC SIGN-DTR转基因杂合小鼠应为白色。小白鼠经鼠尾PCR鉴定后得到DC SIGN-DTR转基因杂合小鼠,即为F1代小鼠。鼠尾PCR鉴定方法同[提取小鼠鼠尾DNA方法,鼠尾PCR鉴定转基因嵌合体小鼠步骤]。F1代小鼠与C57BL/6J母鼠杂交进行传代,培育。培养方法按照常规小鼠饲养模式进行。
实施例4:DC SIGN-DTR转基因小鼠经白喉毒素诱导建立清除单核细胞衍生DC的小鼠模型
本实施例采用腹腔注射白喉毒素(DT),检测小鼠淋巴结中单核细胞衍生DC的占比来检测单核细胞衍生DC的敲除效率,理论上小鼠全身的单核细胞衍生DC都能被敲除。
DC SIGN-DTR转基因小鼠单核细胞衍生DC清除:DC SIGN-DTR转基因小鼠在第1、第2、第4、第7天分别腹腔注射DT(20ng/g),小鼠生长状态无明显变化。对照组小鼠在第1、第4天用4.5Grayγ射线照射4小时。第8天用脱颈椎法处死小鼠,取小鼠淋巴结,用流式细胞术检测淋巴结中单核细胞衍生DC的表达情况。
流式细胞术检测淋巴结中单核细胞衍生DC的表达:获取小鼠淋巴结,制备成单细胞悬液,用2%FCS-PBS重悬细胞,经Fc blocker封闭Fc受体后,利用anti-mouse-CD11c、anti-mouse-MHCII、anti-mouse-CD11b、anti-mouse-CD103流式抗体染色,染色完毕洗去多余抗体,单细胞悬液用CytoFLEX LX Flow Cytometer上机检测。其中CD11c、MHCII、CD11b均高表达的细胞为单核细胞衍生DC。经DT诱导后小鼠单核细胞衍生DC敲除率约达80-90%,如附图7所示(LPS作用是诱导单核细胞分化为单核细胞衍生DC)。
可以理解的是,对本领域技术人员来说,对本发明的技术方案及发明构思加以等同替换或改变都应属于本发明所附的权利要求的保护范围。
序列表
<110> 浙江大学医学院附属第一医院
<120> 打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用
<160> 8
<170> SIPOSequenceListing 1.0
<210> 1
<211> 35
<212> DNA
<213> 引物DCSIGN-5HA-F(NotI)
<400> 1
<210> 2
<211> 33
<212> DNA
<213> 引物DCSIGN-5HA- R(SpeI)
<400> 2
<210> 3
<211> 186
<212> DNA
<213> 基因片段retrieval 5HA()
<400> 3
<210> 4
<211> 33
<212> DNA
<213> 引物DCSIGN-3HA-F(SpeI)
<400> 4
<210> 5
<211> 37
<212> DNA
<213> 引物DCSIGN-3HA-R(BamHI)
<400> 5
<210> 6
<211> 240
<212> DNA
<213> 基因片段retrieval 3HA()
<400> 6
<210> 7
<211> 5706
<212> DNA
<213> 提取载体retrieval 5HA- retrieval 3HA-MCL-HSV TK()
<400> 7
<210> 8
<211> 30136
<212> DNA
<213> 打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK()
<400> 8
Claims (6)
1.一种带小鼠DC-SIGN长同源臂的整合外源基因IRES-DTR的打靶载体,其特征在于,所述靶向打靶载体序列如SEQ ID NO.8所示,命名为pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK。
2.一种用于构建如权利要求1所述打靶载体的提取载体,其特征在于:所述提取载体序列如SEQ ID NO.7所示,命名为载体pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK。
3.一种提取载体的制备方法,其特征在于,所述方法包括如下步骤:
(1)以RP23-12K14 BAC DNA为模板,利用序列如SEQ ID NO.1所示的正向引物和序列如SEQ ID NO.2所示的反向引物进行PCR,扩增出序列如SEQ ID NO.3所示的基因片段DC-SIGN5’侧同源臂;以RP23-12K14 BAC DNA为模板,利用序列如SEQ ID NO.4所示的正向引物和序列如SEQ ID NO.5所示的反向引物进行PCR,扩增出序列如SEQ ID NO.6所示的基因片段DC-SIGN 3’侧同源臂;
(2)将retrieval 5HA和retrieval 3HA利用酶切位点NotI、SpeI、BamHI克隆至带阴性选择标记HSV TK的载体pL253-retrivied-empty,得到序列如SEQ ID NO.7所示的提取载体pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK。
4.一种打靶载体的制备方法,其特征在于:所述方法包括如下步骤:
(1)电穿孔法将质粒pRED/ET转化入BAC Clone DCSIGN-IRES-DTR-PEN,并用L-阿拉伯糖诱导Red/ET表达;
(2)电穿孔法将利用SpeI酶切线性化的pL253-retrieval 5HA-retrieval 3HA-MCL-HSV TK提取载体转化入上述表达RED/ET的BAC Clone DC SIGN-IRES-DTR-PEN,同源重组得到序列如SEQ ID NO.8所示的带有DC-SIGN 5’同源臂(~2kb)和3’同源臂(~20kb)的打靶载体,命名为打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK;
(3)挑选单克隆,利用序列如SEQ ID NO.9所示的正向引物和序列如SEQ ID NO.10所示的反向引物作菌落PCR,成功提取IRES-DTR-PGK-EM7-NEO和DC-SIGN同源臂的载体能够得到约1.2kb的条带。
5.一种打靶载体在靶向整合外源基因IRES-DTR至DC-SIGN外显子7位点构建DC SIGN-DTR转基因小鼠的应用。
6.根据权利要求5所述的打靶载体在靶向整合外源基因IRES-DTR至DC-SIGN外显子7位点构建DC SIGN-DTR转基因小鼠的应用,其特征在于,转基因小鼠的构建方法包括以下步骤:
(1)构建靶向整合外源基因IRES-DTR至DC-SIGN外显子7位点构建小鼠胚胎干细胞株;
(1.1)电穿孔法将利用NotI酶切线性化的打靶载体pL253-DCSIGN 5HA L-IRES-DTR-PEN-DCSIGN 3HA L-MCL-HSV TK转入ES细胞,使IRES-DTR-PGK-EM7-NEO同源重组至DC-SIGN外显子7位点;
(1.2)利用G418阳选和ganciclovir阴选,挑选得到靶向插入IRES-DTR-PGK-EM7-NEO至DC-SIGN外显子7位点的BALB/C ES细胞克隆;
(1.3)提取ES细胞基因组DNA为模板,利用序列为SEQ ID NO.11的正向引物和序列为SEQ ID NO.12的反向引物进行PCR鉴定,靶向插入IRES-DTR-PGK-EM7-NEO至DC-SIGN外显子7位点的ES细胞阳性克隆可见4.1kb条带;
(2)靶向插入IRES-DTR至DC-SIGN外显子7位点的ES细胞注射入C57BL/6J囊胚,再接种到假孕的KM母鼠子宫中,出生得到毛色为黑色和白色混杂嵌合体小鼠;
(3)提取转基因小鼠鼠尾DNA作为模板,利用序列为SEQ ID NO.13的正向引物和序列为SEQ ID NO.14的反向引物作PCR鉴定,带有IRES-DTR的阳性小鼠可见1.2kb条带;
(4)利用白色占比最高的5只雄性转基因嵌合体小鼠与BALB/c雌鼠交配,得到毛色为白色的小鼠可能为DC SIGN-DTR转基因杂合小鼠,小白鼠经鼠尾PCR鉴定后得到DC SIGN-DTR转基因小鼠。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911415260.4A CN111088280A (zh) | 2019-12-31 | 2019-12-31 | 打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911415260.4A CN111088280A (zh) | 2019-12-31 | 2019-12-31 | 打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN111088280A true CN111088280A (zh) | 2020-05-01 |
Family
ID=70397899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201911415260.4A Pending CN111088280A (zh) | 2019-12-31 | 2019-12-31 | 打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111088280A (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111549071A (zh) * | 2020-05-15 | 2020-08-18 | 乾元康安(苏州)生物科技有限公司 | 生产蛋白药物偶联物的药物毒性耐受生产细胞株的构建方法及其应用 |
CN111607614A (zh) * | 2020-05-22 | 2020-09-01 | 乾元康安(苏州)生物科技有限公司 | 白喉毒素调控清除免疫细胞的cd45-dtr转基因小鼠的构建方法与应用 |
CN114214346A (zh) * | 2021-11-04 | 2022-03-22 | 中国人民解放军海军军医大学第三附属医院 | 靶向肝前体细胞的质粒系统及应用 |
-
2019
- 2019-12-31 CN CN201911415260.4A patent/CN111088280A/zh active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111549071A (zh) * | 2020-05-15 | 2020-08-18 | 乾元康安(苏州)生物科技有限公司 | 生产蛋白药物偶联物的药物毒性耐受生产细胞株的构建方法及其应用 |
CN111607614A (zh) * | 2020-05-22 | 2020-09-01 | 乾元康安(苏州)生物科技有限公司 | 白喉毒素调控清除免疫细胞的cd45-dtr转基因小鼠的构建方法与应用 |
CN114214346A (zh) * | 2021-11-04 | 2022-03-22 | 中国人民解放军海军军医大学第三附属医院 | 靶向肝前体细胞的质粒系统及应用 |
CN114214346B (zh) * | 2021-11-04 | 2024-06-11 | 中国人民解放军海军军医大学第三附属医院 | 靶向肝前体细胞的质粒系统及应用 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0695351B1 (en) | Isolation, selection and propagation of animal transgenic stem cells | |
CN111088280A (zh) | 打靶载体及白喉毒素调控清除单核细胞衍生树突状细胞的转基因小鼠的构建方法和应用 | |
JP2010004887A (ja) | ヒト人工染色体(hac)ベクター | |
CN111808887B (zh) | 一种制备与自然突变比利时蓝牛类似的双肌臀肉牛的方法 | |
CN109929875B (zh) | 一种lag3基因人源化动物模型的构建方法及其应用 | |
CN112094868B (zh) | 一种利用单碱基编辑器SpRY-BE4制备CD163基因编辑猪的方法 | |
CN106978416B (zh) | 一种基因定位整合表达系统及其应用 | |
CN103923940A (zh) | 一种定点整合外源基因的方法 | |
CN109321595B (zh) | 一种条件性neuritin knockin小鼠模型的构建方法 | |
CN116179543B (zh) | 基于CRISPR特异性靶向猪Cavin-1基因的sgRNA及应用 | |
CN112094866B (zh) | 一种利用SpRY-Cas9系统制备CD163基因编辑猪的方法 | |
CN112111511B (zh) | 敲除载体、打靶载体、试剂盒、Prdm16检测用动物模型、检测方法及应用 | |
CN114934066A (zh) | 石骨症的基因编辑体系及其应用 | |
CN110923229B (zh) | 一种在黄颡鱼中双gRNA位点敲除dmrt1基因的CRISPR/Cas9系统及应用 | |
CN114480495A (zh) | 一种alb融合蛋白的表达方法及其应用 | |
KR20140052093A (ko) | 넉인 벡터 및 이를 이용한 장기이식용 형질전환 동물의 제조방법 | |
WO2015163711A1 (ko) | 마이오스타틴 유전자를 표적으로 하는 talen 및 이를 이용한 마이오스타틴 유전자가 녹아웃된 동물을 제조하는 방법 | |
CN115322993B (zh) | 一种用于猪基因组定点整合外源基因的安全位点及用其构建猪育种群方法 | |
CN114107291B (zh) | 一种用于外源基因定点插入的基因编辑系统和方法 | |
CN116769774A (zh) | 靶向UTY基因的sgRNA和利用其整合外源基因的绵羊成纤维细胞系及其应用 | |
CN113564203B (zh) | HSV1-tk/GCV诱导型血液系统缺陷小鼠模型的制备方法及应用 | |
CN116732099B (zh) | 一种干细胞多重CRISPR/Cas基因组编辑方法 | |
CN114958767B (zh) | 基于hiPSC细胞构建的神经干细胞制剂的制备方法 | |
CN116478990A (zh) | 靶向ZFX基因的sgRNA和利用其整合外源基因的绵羊成纤维细胞系的建立与应用 | |
KR101048426B1 (ko) | 알파 1,3-갈락토실트랜스퍼라아제 유전자의 위치에 daf 유전자를 넉인한 체세포 제조 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |