CN114107303A - sgRNA、质粒、IRF7功能缺失的细胞系及其构建方法和应用 - Google Patents
sgRNA、质粒、IRF7功能缺失的细胞系及其构建方法和应用 Download PDFInfo
- Publication number
- CN114107303A CN114107303A CN202111494484.6A CN202111494484A CN114107303A CN 114107303 A CN114107303 A CN 114107303A CN 202111494484 A CN202111494484 A CN 202111494484A CN 114107303 A CN114107303 A CN 114107303A
- Authority
- CN
- China
- Prior art keywords
- irf7
- sgrna
- plasmid
- cell line
- cell
- 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
- 102100038070 Interferon regulatory factor 7 Human genes 0.000 title claims abstract description 71
- 101001032342 Homo sapiens Interferon regulatory factor 7 Proteins 0.000 title claims abstract description 63
- 239000013612 plasmid Substances 0.000 title claims abstract description 37
- 108091027544 Subgenomic mRNA Proteins 0.000 title claims abstract description 25
- 230000002950 deficient Effects 0.000 title claims description 8
- 238000010276 construction Methods 0.000 title abstract description 9
- 101100341161 Homo sapiens IRF7 gene Proteins 0.000 claims abstract description 22
- 239000013598 vector Substances 0.000 claims abstract description 15
- 230000008685 targeting Effects 0.000 claims abstract description 6
- 238000012217 deletion Methods 0.000 claims abstract description 5
- 230000037430 deletion Effects 0.000 claims abstract description 5
- 230000006870 function Effects 0.000 claims description 28
- 108091033409 CRISPR Proteins 0.000 claims description 23
- RXWNCPJZOCPEPQ-NVWDDTSBSA-N puromycin Chemical compound C1=CC(OC)=CC=C1C[C@H](N)C(=O)N[C@H]1[C@@H](O)[C@H](N2C3=NC=NC(=C3N=C2)N(C)C)O[C@@H]1CO RXWNCPJZOCPEPQ-NVWDDTSBSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 15
- 238000010354 CRISPR gene editing Methods 0.000 claims description 11
- 229950010131 puromycin Drugs 0.000 claims description 10
- 238000011160 research Methods 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 10
- 238000001890 transfection Methods 0.000 claims description 10
- 241000894006 Bacteria Species 0.000 claims description 8
- 102000043138 IRF family Human genes 0.000 claims description 6
- 108091054729 IRF family Proteins 0.000 claims description 6
- 102000004190 Enzymes Human genes 0.000 claims description 4
- 108090000790 Enzymes Proteins 0.000 claims description 4
- 108010050904 Interferons Proteins 0.000 claims description 4
- 102000014150 Interferons Human genes 0.000 claims description 4
- 239000012930 cell culture fluid Substances 0.000 claims description 4
- 229940079322 interferon Drugs 0.000 claims description 4
- 239000002773 nucleotide Substances 0.000 claims description 4
- 125000003729 nucleotide group Chemical group 0.000 claims description 4
- 230000010076 replication Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 3
- 201000010099 disease Diseases 0.000 claims description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 3
- 229940079593 drug Drugs 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 239000002502 liposome Substances 0.000 claims description 3
- 230000001404 mediated effect Effects 0.000 claims description 3
- 244000000010 microbial pathogen Species 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000003950 pathogenic mechanism Effects 0.000 claims description 3
- 230000026731 phosphorylation Effects 0.000 claims description 3
- 238000006366 phosphorylation reaction Methods 0.000 claims description 3
- 108700005075 Regulator Genes Proteins 0.000 claims description 2
- 238000000137 annealing Methods 0.000 claims description 2
- 125000002091 cationic group Chemical group 0.000 claims description 2
- 238000012258 culturing Methods 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 125000003275 alpha amino acid group Chemical group 0.000 claims 1
- 108020004999 messenger RNA Proteins 0.000 abstract description 15
- 102100033749 Radical S-adenosyl methionine domain-containing protein 2 Human genes 0.000 abstract description 10
- 101710094907 Radical S-adenosyl methionine domain-containing protein 2 Proteins 0.000 abstract description 10
- 108090000623 proteins and genes Proteins 0.000 abstract description 10
- 108090000467 Interferon-beta Proteins 0.000 abstract description 6
- 230000014509 gene expression Effects 0.000 abstract description 6
- 230000005764 inhibitory process Effects 0.000 abstract description 4
- 229960001388 interferon-beta Drugs 0.000 abstract description 4
- 102100026720 Interferon beta Human genes 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 210000004027 cell Anatomy 0.000 description 71
- 241000287828 Gallus gallus Species 0.000 description 11
- 235000013330 chicken meat Nutrition 0.000 description 11
- 108020004414 DNA Proteins 0.000 description 9
- 108010032036 Interferon Regulatory Factor-7 Proteins 0.000 description 9
- 230000009385 viral infection Effects 0.000 description 8
- 241000700605 Viruses Species 0.000 description 7
- 238000004113 cell culture Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000011529 RT qPCR Methods 0.000 description 6
- 101001011382 Homo sapiens Interferon regulatory factor 3 Proteins 0.000 description 5
- 102100029843 Interferon regulatory factor 3 Human genes 0.000 description 5
- 208000036142 Viral infection Diseases 0.000 description 5
- 150000001413 amino acids Chemical group 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 5
- 208000015181 infectious disease Diseases 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 241000271566 Aves Species 0.000 description 4
- 108020005004 Guide RNA Proteins 0.000 description 4
- 101000959820 Homo sapiens Interferon alpha-1/13 Proteins 0.000 description 4
- 102100040019 Interferon alpha-1/13 Human genes 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000003776 cleavage reaction Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000010839 reverse transcription Methods 0.000 description 4
- 230000007017 scission Effects 0.000 description 4
- 101000942626 Homo sapiens UMP-CMP kinase 2, mitochondrial Proteins 0.000 description 3
- 102000004289 Interferon regulatory factor 1 Human genes 0.000 description 3
- 108090000890 Interferon regulatory factor 1 Proteins 0.000 description 3
- 102000003996 Interferon-beta Human genes 0.000 description 3
- 102100032947 UMP-CMP kinase 2, mitochondrial Human genes 0.000 description 3
- 210000002950 fibroblast Anatomy 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 239000002609 medium Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000002018 overexpression Effects 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 238000012163 sequencing technique Methods 0.000 description 3
- 108091032973 (ribonucleotides)n+m Proteins 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 101000598002 Homo sapiens Interferon regulatory factor 1 Proteins 0.000 description 2
- 102100036981 Interferon regulatory factor 1 Human genes 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 108010077850 Nuclear Localization Signals Proteins 0.000 description 2
- 108091028043 Nucleic acid sequence Proteins 0.000 description 2
- 108010087230 Sincalide Proteins 0.000 description 2
- 238000010609 cell counting kit-8 assay Methods 0.000 description 2
- 230000010261 cell growth Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000030944 contact inhibition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003762 quantitative reverse transcription PCR Methods 0.000 description 2
- 238000003753 real-time PCR Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000008844 regulatory mechanism Effects 0.000 description 2
- 230000019491 signal transduction Effects 0.000 description 2
- IZTQOLKUZKXIRV-YRVFCXMDSA-N sincalide Chemical compound C([C@@H](C(=O)N[C@@H](CCSC)C(=O)NCC(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(N)=O)NC(=O)[C@@H](N)CC(O)=O)C1=CC=C(OS(O)(=O)=O)C=C1 IZTQOLKUZKXIRV-YRVFCXMDSA-N 0.000 description 2
- 238000013518 transcription Methods 0.000 description 2
- 230000035897 transcription Effects 0.000 description 2
- 239000012096 transfection reagent Substances 0.000 description 2
- 102000005606 Activins Human genes 0.000 description 1
- 108010059616 Activins Proteins 0.000 description 1
- 229920000936 Agarose Polymers 0.000 description 1
- LWUWMHIOBPTZBA-DCAQKATOSA-N Ala-Arg-Lys Chemical compound NC(=N)NCCC[C@H](NC(=O)[C@@H](N)C)C(=O)N[C@@H](CCCCN)C(O)=O LWUWMHIOBPTZBA-DCAQKATOSA-N 0.000 description 1
- QUIGLPSHIFPEOV-CIUDSAMLSA-N Ala-Lys-Ala Chemical compound [H]N[C@@H](C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C)C(O)=O QUIGLPSHIFPEOV-CIUDSAMLSA-N 0.000 description 1
- 241000272517 Anseriformes Species 0.000 description 1
- 102100037435 Antiviral innate immune response receptor RIG-I Human genes 0.000 description 1
- 101710127675 Antiviral innate immune response receptor RIG-I Proteins 0.000 description 1
- 241000203069 Archaea Species 0.000 description 1
- OQCWXQJLCDPRHV-UWVGGRQHSA-N Arg-Gly-Leu Chemical compound [H]N[C@@H](CCCNC(N)=N)C(=O)NCC(=O)N[C@@H](CC(C)C)C(O)=O OQCWXQJLCDPRHV-UWVGGRQHSA-N 0.000 description 1
- OFIYLHVAAJYRBC-HJWJTTGWSA-N Arg-Ile-Phe Chemical compound CC[C@H](C)[C@H](NC(=O)[C@@H](N)CCCNC(N)=N)C(=O)N[C@@H](Cc1ccccc1)C(O)=O OFIYLHVAAJYRBC-HJWJTTGWSA-N 0.000 description 1
- GNYUVVJYGJFKHN-RVMXOQNASA-N Arg-Ile-Pro Chemical compound CC[C@H](C)[C@@H](C(=O)N1CCC[C@@H]1C(=O)O)NC(=O)[C@H](CCCN=C(N)N)N GNYUVVJYGJFKHN-RVMXOQNASA-N 0.000 description 1
- BSYKSCBTTQKOJG-GUBZILKMSA-N Arg-Pro-Ala Chemical compound [H]N[C@@H](CCCNC(N)=N)C(=O)N1CCC[C@H]1C(=O)N[C@@H](C)C(O)=O BSYKSCBTTQKOJG-GUBZILKMSA-N 0.000 description 1
- LRPZJPMQGKGHSG-XGEHTFHBSA-N Arg-Ser-Thr Chemical compound C[C@H]([C@@H](C(=O)O)NC(=O)[C@H](CO)NC(=O)[C@H](CCCN=C(N)N)N)O LRPZJPMQGKGHSG-XGEHTFHBSA-N 0.000 description 1
- LEFKSBYHUGUWLP-ACZMJKKPSA-N Asn-Ala-Glu Chemical compound [H]N[C@@H](CC(N)=O)C(=O)N[C@@H](C)C(=O)N[C@@H](CCC(O)=O)C(O)=O LEFKSBYHUGUWLP-ACZMJKKPSA-N 0.000 description 1
- OROMFUQQTSWUTI-IHRRRGAJSA-N Asn-Phe-Arg Chemical compound C1=CC=C(C=C1)C[C@@H](C(=O)N[C@@H](CCCN=C(N)N)C(=O)O)NC(=O)[C@H](CC(=O)N)N OROMFUQQTSWUTI-IHRRRGAJSA-N 0.000 description 1
- FAEIQWHBRBWUBN-FXQIFTODSA-N Asp-Arg-Ser Chemical compound C(C[C@@H](C(=O)N[C@@H](CO)C(=O)O)NC(=O)[C@H](CC(=O)O)N)CN=C(N)N FAEIQWHBRBWUBN-FXQIFTODSA-N 0.000 description 1
- KPSHWSWFPUDEGF-FXQIFTODSA-N Asp-Pro-Ala Chemical compound OC(=O)[C@H](C)NC(=O)[C@@H]1CCCN1C(=O)[C@@H](N)CC(O)=O KPSHWSWFPUDEGF-FXQIFTODSA-N 0.000 description 1
- RKXVTTIQNKPCHU-KKHAAJSZSA-N Asp-Val-Thr Chemical compound C[C@@H](O)[C@@H](C(O)=O)NC(=O)[C@H](C(C)C)NC(=O)[C@@H](N)CC(O)=O RKXVTTIQNKPCHU-KKHAAJSZSA-N 0.000 description 1
- 241000283707 Capra Species 0.000 description 1
- NOCCABSVTRONIN-CIUDSAMLSA-N Cys-Ala-Leu Chemical compound C[C@@H](C(=O)N[C@@H](CC(C)C)C(=O)O)NC(=O)[C@H](CS)N NOCCABSVTRONIN-CIUDSAMLSA-N 0.000 description 1
- 102000012410 DNA Ligases Human genes 0.000 description 1
- 108010061982 DNA Ligases Proteins 0.000 description 1
- 230000004568 DNA-binding Effects 0.000 description 1
- 241000252212 Danio rerio Species 0.000 description 1
- 239000006144 Dulbecco’s modified Eagle's medium Substances 0.000 description 1
- 101000944251 Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139) Calcium/calmodulin-dependent protein kinase cmkA Proteins 0.000 description 1
- 101710204837 Envelope small membrane protein Proteins 0.000 description 1
- 108010008655 Epstein-Barr Virus Nuclear Antigens Proteins 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- FGYPOQPQTUNESW-IUCAKERBSA-N Gln-Gly-Leu Chemical compound CC(C)C[C@@H](C(=O)O)NC(=O)CNC(=O)[C@H](CCC(=O)N)N FGYPOQPQTUNESW-IUCAKERBSA-N 0.000 description 1
- AFWYPMDMDYCKMD-KBPBESRZSA-N Gly-Leu-Tyr Chemical compound NCC(=O)N[C@@H](CC(C)C)C(=O)N[C@H](C(O)=O)CC1=CC=C(O)C=C1 AFWYPMDMDYCKMD-KBPBESRZSA-N 0.000 description 1
- 102100031181 Glyceraldehyde-3-phosphate dehydrogenase Human genes 0.000 description 1
- LQGCNWWLGGMTJO-ULQDDVLXSA-N His-Met-Phe Chemical compound CSCC[C@@H](C(=O)N[C@@H](CC1=CC=CC=C1)C(=O)O)NC(=O)[C@H](CC2=CN=CN2)N LQGCNWWLGGMTJO-ULQDDVLXSA-N 0.000 description 1
- 101001138544 Homo sapiens UMP-CMP kinase Proteins 0.000 description 1
- 108010014726 Interferon Type I Proteins 0.000 description 1
- 102000002227 Interferon Type I Human genes 0.000 description 1
- SENJXOPIZNYLHU-UHFFFAOYSA-N L-leucyl-L-arginine Natural products CC(C)CC(N)C(=O)NC(C(O)=O)CCCN=C(N)N SENJXOPIZNYLHU-UHFFFAOYSA-N 0.000 description 1
- 241000880493 Leptailurus serval Species 0.000 description 1
- WUFYAPWIHCUMLL-CIUDSAMLSA-N Leu-Asn-Ala Chemical compound [H]N[C@@H](CC(C)C)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](C)C(O)=O WUFYAPWIHCUMLL-CIUDSAMLSA-N 0.000 description 1
- QNBVTHNJGCOVFA-AVGNSLFASA-N Leu-Leu-Glu Chemical compound CC(C)C[C@H](N)C(=O)N[C@@H](CC(C)C)C(=O)N[C@H](C(O)=O)CCC(O)=O QNBVTHNJGCOVFA-AVGNSLFASA-N 0.000 description 1
- 102000003960 Ligases Human genes 0.000 description 1
- 108090000364 Ligases Proteins 0.000 description 1
- 101710145006 Lysis protein Proteins 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- 241000699670 Mus sp. Species 0.000 description 1
- WUGMRIBZSVSJNP-UHFFFAOYSA-N N-L-alanyl-L-tryptophan Natural products C1=CC=C2C(CC(NC(=O)C(N)C)C(O)=O)=CNC2=C1 WUGMRIBZSVSJNP-UHFFFAOYSA-N 0.000 description 1
- DNAXXTQSTKOHFO-QEJZJMRPSA-N Phe-Lys-Ala Chemical compound OC(=O)[C@H](C)NC(=O)[C@H](CCCCN)NC(=O)[C@@H](N)CC1=CC=CC=C1 DNAXXTQSTKOHFO-QEJZJMRPSA-N 0.000 description 1
- JARJPEMLQAWNBR-GUBZILKMSA-N Pro-Asp-Arg Chemical compound [H]N1CCC[C@H]1C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CCCNC(N)=N)C(O)=O JARJPEMLQAWNBR-GUBZILKMSA-N 0.000 description 1
- YIPFBJGBRCJJJD-FHWLQOOXSA-N Pro-Trp-Leu Chemical compound CC(C)C[C@@H](C(=O)O)NC(=O)[C@H](CC1=CNC2=CC=CC=C21)NC(=O)[C@@H]3CCCN3 YIPFBJGBRCJJJD-FHWLQOOXSA-N 0.000 description 1
- 241000700159 Rattus Species 0.000 description 1
- AEGUWTFAQQWVLC-BQBZGAKWSA-N Ser-Gly-Arg Chemical compound [H]N[C@@H](CO)C(=O)NCC(=O)N[C@@H](CCCNC(N)=N)C(O)=O AEGUWTFAQQWVLC-BQBZGAKWSA-N 0.000 description 1
- PPCZVWHJWJFTFN-ZLUOBGJFSA-N Ser-Ser-Asp Chemical compound [H]N[C@@H](CO)C(=O)N[C@@H](CO)C(=O)N[C@@H](CC(O)=O)C(O)=O PPCZVWHJWJFTFN-ZLUOBGJFSA-N 0.000 description 1
- 241000187747 Streptomyces Species 0.000 description 1
- 241000282887 Suidae Species 0.000 description 1
- 238000010459 TALEN Methods 0.000 description 1
- 241000907504 Tembusu virus Species 0.000 description 1
- 108010043645 Transcription Activator-Like Effector Nucleases Proteins 0.000 description 1
- HLDFBNPSURDYEN-VHWLVUOQSA-N Trp-Ile-Asp Chemical compound CC[C@H](C)[C@@H](C(=O)N[C@@H](CC(=O)O)C(=O)O)NC(=O)[C@H](CC1=CNC2=CC=CC=C21)N HLDFBNPSURDYEN-VHWLVUOQSA-N 0.000 description 1
- OWSRIUBVJOQHNY-IHPCNDPISA-N Trp-Lys-His Chemical compound C1=CC=C2C(=C1)C(=CN2)C[C@@H](C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC3=CN=CN3)C(=O)O)N OWSRIUBVJOQHNY-IHPCNDPISA-N 0.000 description 1
- WKQNLTQSCYXKQK-VFAJRCTISA-N Trp-Lys-Thr Chemical compound [H]N[C@@H](CC1=CNC2=C1C=CC=C2)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)O)C(O)=O WKQNLTQSCYXKQK-VFAJRCTISA-N 0.000 description 1
- HVHJYXDXRIWELT-RYUDHWBXSA-N Tyr-Glu-Gly Chemical compound [H]N[C@@H](CC1=CC=C(O)C=C1)C(=O)N[C@@H](CCC(O)=O)C(=O)NCC(O)=O HVHJYXDXRIWELT-RYUDHWBXSA-N 0.000 description 1
- 102100020797 UMP-CMP kinase Human genes 0.000 description 1
- XTAUQCGQFJQGEJ-NHCYSSNCSA-N Val-Gln-Arg Chemical compound CC(C)[C@@H](C(=O)N[C@@H](CCC(=O)N)C(=O)N[C@@H](CCCN=C(N)N)C(=O)O)N XTAUQCGQFJQGEJ-NHCYSSNCSA-N 0.000 description 1
- VCAWFLIWYNMHQP-UKJIMTQDSA-N Val-Glu-Ile Chemical compound CC[C@H](C)[C@@H](C(=O)O)NC(=O)[C@H](CCC(=O)O)NC(=O)[C@H](C(C)C)N VCAWFLIWYNMHQP-UKJIMTQDSA-N 0.000 description 1
- PZTZYZUTCPZWJH-FXQIFTODSA-N Val-Ser-Ser Chemical compound CC(C)[C@@H](C(=O)N[C@@H](CO)C(=O)N[C@@H](CO)C(=O)O)N PZTZYZUTCPZWJH-FXQIFTODSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000488 activin Substances 0.000 description 1
- 210000005006 adaptive immune system Anatomy 0.000 description 1
- 238000000246 agarose gel electrophoresis Methods 0.000 description 1
- 108010066829 alanyl-glutamyl-aspartylprolyine Proteins 0.000 description 1
- 108010086434 alanyl-seryl-glycine Proteins 0.000 description 1
- 108010044940 alanylglutamine Proteins 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000840 anti-viral effect Effects 0.000 description 1
- 108010068380 arginylarginine Proteins 0.000 description 1
- 108010093581 aspartyl-proline Proteins 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000010310 bacterial transformation Effects 0.000 description 1
- 230000008827 biological function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006143 cell culture medium Substances 0.000 description 1
- 239000006285 cell suspension Substances 0.000 description 1
- 230000003833 cell viability Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000007248 cellular mechanism Effects 0.000 description 1
- 238000010367 cloning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 238000006471 dimerization reaction Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000012154 double-distilled water Substances 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000001976 enzyme digestion Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 231100000221 frame shift mutation induction Toxicity 0.000 description 1
- 230000037433 frameshift Effects 0.000 description 1
- 238000010363 gene targeting Methods 0.000 description 1
- 108020004445 glyceraldehyde-3-phosphate dehydrogenase Proteins 0.000 description 1
- 108010050475 glycyl-leucyl-tyrosine Proteins 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 102000053956 human IRF7 Human genes 0.000 description 1
- 210000005260 human cell Anatomy 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000007365 immunoregulation Effects 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000015788 innate immune response Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 108010000761 leucylarginine Proteins 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 102000007863 pattern recognition receptors Human genes 0.000 description 1
- 108010089193 pattern recognition receptors Proteins 0.000 description 1
- 108010018625 phenylalanylarginine Proteins 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 108010025488 pinealon Proteins 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 108091008146 restriction endonucleases Proteins 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 108010001055 thymocartin Proteins 0.000 description 1
- 230000010472 type I IFN response Effects 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
- 210000003934 vacuole Anatomy 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/113—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4702—Regulators; Modulating activity
-
- 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
-
- 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
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0652—Cells of skeletal and connective tissues; Mesenchyme
- C12N5/0656—Adult fibroblasts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5044—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics involving specific cell types
-
- 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
- C12N2310/00—Structure or type of the nucleic acid
- C12N2310/10—Type of nucleic acid
- C12N2310/20—Type of nucleic acid involving clustered regularly interspaced short palindromic repeats [CRISPRs]
-
- 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
- C12N2503/00—Use of cells in diagnostics
- C12N2503/02—Drug screening
-
- 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
- C12N2510/00—Genetically modified cells
-
- 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
- C12N2800/10—Plasmid DNA
- C12N2800/106—Plasmid DNA for vertebrates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2500/00—Screening for compounds of potential therapeutic value
- G01N2500/10—Screening for compounds of potential therapeutic value involving cells
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Genetics & Genomics (AREA)
- Biomedical Technology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Zoology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Wood Science & Technology (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Immunology (AREA)
- Biophysics (AREA)
- Physics & Mathematics (AREA)
- Cell Biology (AREA)
- Hematology (AREA)
- Medicinal Chemistry (AREA)
- Toxicology (AREA)
- Plant Pathology (AREA)
- Urology & Nephrology (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Tropical Medicine & Parasitology (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Rheumatology (AREA)
- Gastroenterology & Hepatology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
本发明属于生物技术领域,提供了一种用于特异性靶向IRF7基因的sgRNA,所述sgRNA序列如SEQ ID NO.1和SEQ ID NO.2所示。该sgRNA引物可与合适的载体结构构成质粒,用于敲除相应的基因实现IRF7功能的缺失。同时,本发明还提供了一种质粒、IRF7功能缺失的细胞系及其构建方法和应用。本发明的细胞系的优势在于:IFN‑βmRNA水平、IRF1mRNA水平、VIPERIN mRNA水平、CMPK2mRNA水平可以达到显著的抑制。相比于CN201910352557.4仅抑制干扰素β表达水平,其其他方面的抑制更为显著。
Description
技术领域
本发明属于生物技术领域,更具体而言,涉及一种用于特异性靶向IRF7基因的sgRNA、质粒、IRF7功能缺失的细胞系及其构建方法和应用。
背景技术
干扰素调节因子7(interferon regulatory factor 7,IRF7)属于干扰素调节因子(interferon regulatory factor 7,IRF)家族的一员,因能与EB病毒核抗原1(Epsten-Barr virus nuclear antigen-1,EBNA-1)基因Qp启动子上(BamHIQ promoter,Qp)的SRE类似元件结合并抑制其转录而被发现,其现被认为是诱导I型IFN最重要的干扰素调节因子。人的IRF7于1997年首次克隆,是TLR和RIG-I信号通路的共同下游因子。所有的IRF7都含有一个保守的N端DNA结合域(DNA-binding domain,DBD)和一个IRF相关结构域(IRF-associated domain,IAD),其中IRF家族成员IRF7和IRF3在I型IFN介导的天然免疫中起着关键作用。PRRs对病原体的识别导致IRF3和/或IRF7的激活。磷酸化激活IRF7,诱导核定位信号(nuclear localization signal,NLS)的二聚化和暴露。激活的IRF7/IRF3转位到细胞核,与激活蛋白1(activating protein 1,AP-1)和核因子κ核因子κtivating protein 1,AP-1)NL形成增强体。这些蛋白结合到它们各自的正调控结构域,导致辅助因子的招募,从而导致I型IFN的转录。
在哺乳动物中,IRF7和IRF3在启动I型干扰素反应以建立抗病毒状态上的协同作用是很有特点的;然而,由于禽类中免疫相关基因的库较少,禽类可能利用不同的调节系统。特别是,禽类缺少IRF3,只有IRF7,它与其哺乳动物同源物的氨基酸序列同源性不到40%。因此,对禽IRF7基因的研究可能是阐明鸭体内宿主免疫调节抗DTMUV的潜在细胞机制的一个很好的起点。
CRISPR/Cas9起源于细菌和古生菌适应性免疫系统,它们防御噬菌体或外来质粒的入侵。CRISPR/Cas9系统可以通过使用Cas9蛋白和gRNA来靶向特定的基因组位点,gRNA包括一个20nt的序列,通过WatsonCrick碱基配对与其DNA靶点结合。靶位点必须有一个序列基序,称为前间区序列邻近基序(protospacer adjacent motif,PAM),正好位于20bp的靶序列下游。ZFN和TALEN需要为每个靶序列设计一个新的蛋白质,而CRISPR/Cas9系统中只需将20nt的靶互补gRNA与PAM附近的靶DNA序列进行匹配。因此,这些gRNA可以快速构建并且易于使用。在体外工作显示了特定位点的切割功能之后,迅速开发了CRISPR/Cas9系统。到目前为止,CRISPR/Cas9技术已经应用于人类细胞和许多其他生物,如斑马鱼、小鼠、大鼠,猪和山羊。然而,关于这项技术在鸡中应用的信息很少。
经过检索,得到如下对比文件:CN201910352557.4公开了一种靶向敲除鸡IRF7基因的方法及其在疫苗制备中的应用;基于CRISPR/Cas9,设计针对鸡IRF7基因的gRNA靶序列并连接至VK001-02质粒,获得鸡IRF7基因打靶载体;利用脂质体将打靶载体转染至鸡成纤维细胞中。通过嘌呤霉素筛选转染成功的细胞后,经有限倍比稀释法筛选获得敲除chIRF7基因的鸡成纤维细胞。该敲除细胞系经TCID50验证表明其可使病毒滴度增高。
该方案采用鸡成纤维细胞DF-1转染载体并采用使用嘌呤霉素筛选转染成功的细胞,其有益效果记载:敲除鸡IRF7,干扰素β的表达受到显著抑制,因干扰素β对于机体抵御病毒感染至关重要,故由此可推测敲除鸡IRF7将有利于病毒繁殖,鸡IRF7缺失的细胞病毒滴度更高,亦即敲除鸡IRF7基因有利于病毒的增殖。
本案要解决的问题是:如何实现更好的基因功能敲除效果。
发明内容
本发明的主要目的在于提供一种sgRNA;该sgRNA引物可与合适的载体结构构成质粒,用于敲除相应的基因实现IRF7功能的缺失。
同时,本发明还提供了一种质粒、IRF7功能缺失的细胞系及其构建方法和应用。
本发明的细胞系的优势在于:IFN-βmRNA水平、IRF1 mRNA水平、VIPERIN mRNA水平、CMPK2 mRNA水平可以达到显著的抑制。
相比于CN201910352557.4仅抑制干扰素β表达水平,其其他方面的抑制更为显著。
根据本发明的第一方面,提供了一种用于特异性靶向IRF7基因的sgRNA,所述sgRNA序列如SEQ ID NO.1和SEQ ID NO.2所示。
sgRNA-F:ggtcgtcgttgcacttggag(SEQ ID NO:1);
sgRNA-R:ctccaagtgcaacgacgacc(SEQ ID NO:2)。
其中,IRF7基因的核苷酸序列如SEQ ID NO.5所示。
同时,本发明还公开了一种CRISPR/Cas9敲除IRF7基因的质粒,所述质粒含有sgRNA,所述如sgRNA的序列如SEQ ID NO.1和SEQ ID NO.2所示。
在上述的CRISPR/Cas9敲除IRF7基因的质粒中,所述质粒由所述sgRNA和pX459载体连接得到。
同时,本发明还公开了一种IRF7功能缺失的细胞系的构建方法,包括如下步骤:
步骤1:构建如上所述的质粒;
步骤2:将所述质粒转染至宿主细胞,得到转染细胞;
步骤3:将转染细胞培养筛选得到IRF7功能缺失的细胞系;
所述宿主细胞为DF-1细胞。
在上述的IRF7功能缺失的细胞系的构建方法中,所述步骤1具体为:
步骤11:构建两端加上酶切位点的sgRNA,得到引物;
加上酶切位点的sgRNA如下所示:(斜体为酶切位点)
sgRNA-F:CACCg GGTCGTCGTTGCACTTGGAG
sgRNA-R:AAAC CTCCAAGTGCAACGACGACC c
步骤12:将引物磷酸化修饰和退火;
步骤13:将通过Bbsl酶切的pX459载体与引物连接,并转化进入到转化DH5α感受态细菌;
步骤14:挑取步骤13转化得到的细菌进行单克隆细菌扩增培养,分离得到质粒pX459-sgIRF7。
在上述的IRF7功能缺失的细胞系的构建方法中,所述步骤2具体为:
用质粒pX459-sgIRF7转染DF-1细胞;
所述步骤3具体为:
转染后的DF-1细胞培养一段时间后在培养皿内加入嘌呤霉素使其终浓度为5μg/ml,并坚持每3天用含5μg/ml的嘌呤霉素的细胞培养液更换一次,10天后改为用不含嘌呤霉素的细胞培养液每5天更换一次,直到有明显的细胞群落出现,经筛选得到IRF7功能缺失的细胞系。
在上述的IRF7功能缺失的细胞系的构建方法中,所述转染为阳离子脂质体介导的转染。
同时,本发明还公开了一种IRF7功能缺失的DF-1细胞系,所述DF-1细胞系表达突变型IRF7,所述突变型IRF7的氨基酸序列如SEQ ID NO.3所示;所述DF-1细胞系含有编码所述突变型IRF7的如SEQ ID NO.4所示的核苷酸。
SEQ ID NO:3:
MAALDSEGDAQKLRFGPWLLNAVSSGLYRGLCWIDPDRRIFRIPWKHNARKDVTSSDVEIFKAWAKASGRYEGNAEDPAKWKTNFRCALRSTHMFMLLEDRSVQRRPAQGLRGCLRRPQ*
上述的DF-1细胞系在以下至少之一中的应用:干扰素及其调控基因的全功能研究;病原微生物复制、调控、致病机制研究;抗病药物筛选。
本发明上述技术方案中的一个技术方案至少具有如下优点或有益效果之一:
本发明提供了用于特异性靶向IRF7基因的sgRNA、用于CRISPR/Cas9敲除IRF7基因的质粒,以及IRF7功能缺失的细胞系的构建方法,成功构建得到了IRF7功能缺失的DF-1细胞系,为干扰素调节因子的全功能研究,如寻找与干扰素调节因子调控机理相关的病原分子以及干扰素调节因子下游因子;病原微生物,如病毒,复制、调控、致病机制的研究;抗病药物筛选等提供了不可多得的研究工具。
附图说明
下面结合附图和实施例对本发明进一步地说明;
图1 DF1-WT和KO IRF7培养4-48h的细胞表型;
图2 DF1-WT和KO IRF7的细胞生长曲线;
图3 DF1-WT和KO IRF7感染后IFN-β的mRNA水平;
图4 DF1-WT和KO IRF7感染后IRF1的mRNA水平;
图5 DF1-WT和KO IRF7感染后VIPERIN的mRNA水平;
图6 DF1-WT和KO IRF7感染后CMPK2的mRNA水平。
具体实施方式
下面详细描述本发明的实施方式,实施方式的示例在附图中示出,其中相同或类似的标号自始至终表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的,仅用于解释本发明,而不能理解为对本发明的限制。
本发明实施例中使用的仪器,试剂如下:
超净工作台SW-CJ-2FD(苏州安泰空气技术有限公司,中国江苏);CO2恒温培养箱Forma371(Thermo公司,美国);生物安全柜1300SERIES A2(Thermo公司,美国);倒置光学显微镜(Nikon公司,日本);移液器Research plus(Eppendorf公司,德国);高速离心机Centrifuge 5804R(Eppendorf公司,德国);PCR仪C1000 Touch(Bio-Rad公司,美国);垂直电泳槽Mini Protean Tetra(Bio-Rad公司,美国);电泳仪Power Pac Basic(Bio-Rad公司,美国);凝胶成像系统2500(R)(Tanon公司,中国上海)。
Gel Extraction Kit(D2500-02)购自OMEGA;TIAN prep Mini Plasmid Kit(DP103-03)购自天根生化科技(北京)有限公司;M-MLVRT(2641A)购自TAKARA;RRI(2313A)购自TAKARA;Random 6primer(3801)购自TAKARA;Agarose(E0301)购自TSINGK;Lipofectamine LTX and Plus Reagent(15338-100)购自Invitrogen;0.25%Trypsin-EDTA(25200-056),DMEM basic(C11995500BT)购自Gibco;FBS(10099-141C)购自Gibco;Premix-Taq(RR902A)购自TAKARA;Prime STAR GXL(R050)购自TAKARA;Pen Streppenicillin Streptomycin(15140-122)购自Gibco;T4 DNA连接酶及其他常用限制性内切酶均购自TAKARA;氯仿,异丙醇,无水乙醇等生化试剂购自宁波萃英化学技术有限公司;Trizol 15596-026购自Invitrogen;CCK-8试剂盒购自赛默飞,抗DTMUV E蛋白抗体,抗VIPERIN抗体由武汉百意欣生物有限购公司制备。坦布苏病毒DTMUV QY17(GenBankAccession No.MT447092)由华农(肇庆)生物产业技术研究院提供。
本发明实施例中使用的pX459质粒来自于微旋基因公司。克隆载体pMD19T-Vector和大肠杆菌感受态细胞DH5α购自大连宝日医生物有限公司。
本发明实施例涉及的测序及引物合成均在生工生物工程(上海)股份有限公司完成。
实施例1构建用于敲除IRF7基因的sgRNA质粒pX459-sgIRF7
1.设计筛选得到下面两条sgRNA:
sgRNA-F:GGTCGTCGTTGCACTTGGAG(SEQ ID NO:1);
sgRNA-R:CTCCAAGTGCAACGACGACC(SEQ ID NO:2)。
2.在sgRNA两端加上Bbsl酶切位点(斜体)
sgRNA-F:CACCg GGTCGTCGTTGCACTTGGAG
sgRNA-R:AAAC CTCCAAGTGCAACGACGACC c
将上述引物送生物工程公司合成。
3.将引物磷酸化修饰和退火,具体操作如下:
用蒸馏水重悬sgRNA到终浓度100μM,按下述方法加磷酸基团和退火,具体工艺和配方可参考表1。
表1
4.将pX459载体通过Bbsl酶切:
取1μg pX459质粒,37℃下用Bbsl-HFTM酶切30min,具体配方可参考表2:
表2
pX459 | 1μg |
FastDigest Bbsl-HF<sup>TM</sup> | 1μl |
10×Cutsmart | 2μl |
ddH2O | 2μl |
Total | 20μl |
琼脂糖凝胶电泳检测酶切效果,并用胶回收试剂盒回收线性化后的片段。
5.将按上述方法制备好的sgRNA与线性化的pX459连接,室温连接半小时。具体配方可参考表3。
表3
6.将上述连接产物直接用于转化DH5α感受态细菌(大连宝日医生物有限公司),并按厂家说明书进行转化。
7.挑取单克隆细菌扩增培养,并用TIAN prep Mini Plasmid Kit提取质粒DNA提质粒,命名为pX459-sgIRF7并送生物公司测序验证。质粒DNA的提取完全按试剂盒的指导方法进行。
实施例2筛选IRF7功能缺失细胞系
1.将DF-1细胞培养于30mm瓶皿,24h之内用pX459-sgIRF7质粒进行转染。转染使用赛默飞Lipofectamine LTX DNA Transfection Reagents转染试剂盒,并严格按试剂盒指导方法进行转染。
2.待转染细胞培养36小时后在培养皿内加入嘌呤霉素使其终浓度为5μg/ml,并坚持每3天用含嘌呤霉素(5μg/ml)的细胞培养液更换一次。(如果细胞密度太大需将细胞稀释培养以利于筛选单个细胞系。)10天后改为用不含嘌呤霉素的细胞培养液每5天更换一次,直到有明显的细胞群落出现(约需2-3周)。我们挑选了10个细胞群落进行单群落细胞培养,并将这些细胞株命名为DF1-dIRF7-A1,DF-dIRF7-A2,DF1-dIRF7-A3,……,DF-dIRF7-A10。细胞培养液为含10%FBS的DMEM-F12培养基。
3.鉴定DF-dIRF7细胞株的突变IRF7基因。
分别从上述10个细胞株单独提取细胞全基因组DNA,并用Premix Taq(TAKARA)和引物F:TAGTCTTCAAGGCAGGTGAG;R:CTGCAATGCTCCAGCAGCAG进行PCR。
将PCR产物纯化后分别用T4连接酶连接到pMD19-T载体。
经细菌转化,质粒提取后分别用M13F/M3R引物检测这4个质粒的核苷酸序列。
结果显示10个PCR产物中有9个出现缺失性突变。经测序显示,与野生型IRF7基因(SEQ ID NO:5)相比,突变型IRF7基因(SEQ ID NO:4)的第306(C)和第307(A)核苷酸丢失了,该碱基的丢失造成了氨基酸移码突变,突变造成第102个氨基酸(S)以后移码并提前终止,突变型IRF7的氨基酸序列如SEQ ID NO:3所示。
SEQ ID NO:3:
MAALDSEGDAQKLRFGPWLLNAVSSGLYRGLCWIDPDRRIFRIPWKHNARKDVTSSDVEIFKAWAKASGRYEGNAEDPAKWKTNFRCALRSTHMFMLLEDRSVQRRPAQGLRGCLRRPQ*
斜体字部分为异常IRF7序列,其余为正常IRF7序列。
实施例3鉴定IRF7突变细胞株(KO IRF7)的生物学功能
1.细胞生长特性
图1示野生型DF-1(DF1-WT)和KO IRF7细胞培养12-96h时的细胞表型。结果示二者无明显差异。12-36h细胞生长良好,48h后由于接触性抑制细胞出现衰老甚至老死亡(空泡)。
用CCK法测定DF1-WT和KO IRF7细胞活力并绘制生长曲线。方法如下:
将细胞悬液接种于96孔板中,100μl/每孔,每个时间点设置6孔,置37℃,5%CO2培养。每隔12小时取出细胞每孔加入10μl CCK-8,轻轻混匀,避免产生气泡,再置回培养箱孵育2小时后用酶标仪测定450nm吸收值。计算6孔的平均值和标准误,作图。
结果(图2)显示二者无明显差异。二者完成1个复制周期(对倍增殖)的时间均在24h左右。后期受接触性抑制影响细胞逐渐死亡。
2.鉴定KO IRF7的IRF7功能
IRF7现被认为是诱导I型IFN最重要的干扰素调节因子,DTMUV感染DF-1后,I型干扰素会激活干扰素信号通路诱导大量ISG表达,如果细胞的IRF7功能受损,这些调控过程将不能顺利进行,以至于病毒感染后不能诱导ISG表达。下面的实验结果证明了KO IRF7有严重的IRF7功能缺失。
DF1-WT和KO IRF7细胞分别转染空载和过表达IRF7质粒,24h后以1MOI DTMUV感染,并分别在感染后24h,36h和48h搜集细胞,提取总RNA,进行RT-qPCR定量检测IFN-β、IRF1、VIPERIN、CMPK2的mRNA水平。
细胞培养与病毒感染操作方法如下:
细胞培养液:含10%FBS的DMEM-F12
细胞培养箱:37℃,5%CO2
转染过表达质粒:将细胞培养于6孔板内,待其95%贴壁后弃去培养液,用无菌PBS洗两遍后,每孔各加入150μL OPTI-MEM。按照Lipofectamine LTX and Plus Reagent转染试剂说明书进行转染,6h后更换成含10%FBS的DMEM-F12培养液。
病毒感染:转染24h后,用无菌PBS清洗2次后加2mL含约1个MOI病毒量的含1%FBS的DMEM-F12培养基。将细胞置回细胞培养箱孵育2h后再弃去培养液,加入2mL含1%FBS的DMEM-F12培养基,置回细胞培养箱继续培养。
上述涉及细胞,病毒的实验均在生物安全柜进行。
RT-qPCR定量检测方法如下:
总RNA用TRIzol(Invitrogen)提取。RT(reverse-transcription)用PrimeScriptTM RT Master Mix(Takara)试剂盒,qPCR(quantitative PCR)用Premix Ex TaqTM II Kid试剂盒(Applied Biosystems公司)。所有反应完全按照厂家提供的方法进行。RT引物为随机引物(Random 6primer#3801),qPCR引物序列见下表4。
表4
qPCR用QuantStudio 3 Real-Time PCR System(Applied Biosystems公司)方法进行分析。标准反应包括50℃for 3min,95℃for 3min,然后40个循环反应(95℃,5s,60℃,30s)。上述IFN-β、IRF1、VIPERIN、CMPK2d的mRNA水平分别通过用IFN-β、IRF1、VIPERIN、CMPK2的qPCR值除以同一样本中的GAPDH值所获的相对值来表示。通过这种标准化处理排除人为实验误差。
其结果如下:如图3所示,病毒感染DF1-WT细胞24h,36h和48h后,IFN-βmRNA水平(纵坐标表示IFN-βmRNA水平)分别增加了约25和15倍;而用同样方法感染KO IRF7细胞,在同一时间点IRF1 mRNA水平仅有微弱的上升,其值约为5和1.5倍上升。如图4所示,病毒感染DF1-WT细胞24h,36h和48h后,IRF1 mRNA水平(纵坐标表示IRF1 mRNA水平)分别增加了约14和13倍;而用同样方法感染KO IRF7细胞,在同一时间点IRF1 mRNA水平仅有微弱的上升,约为1.6和1.5倍上升。如图5所示,病毒感染DF1-WT细胞24h,36h和48h后,VIPERIN mRNA水平(纵坐标表示VIPERIN mRNA水平)分别增加了约6.2和3.3倍;而用同样方法感染KO IRF7细胞,而在同一时间点VIPERIN mRNA水平有微弱的下降,约为0.15和0.28倍下降。如图6所示,病毒感染DF1-WT细胞24h,36h和48h后,CMPK2 mRNA水平(纵坐标表示CMPK2 mRNA水平)分别增加了约7和4倍;而用同样方法感染KO IRF7细胞,在同一时间点IRF1 mRNA水平仅有微弱的上升,约为2.8和1.8倍上升。在敲除细胞上进行过表达后,IFN-β、IRF1、VIPERIN、CMPK2的表达有一定的恢复。
尽管已经示出和描述了本发明的实施方式,本领域的普通技术人员可以理解:在不脱离本发明的原理和宗旨的情况下可以对这些实施方式进行多种变化、修改、替换和变型,本发明的范围由权利要求及其等同物限定。
序列表
<110> 岭南现代农业科学与技术广东省实验室肇庆分中心
华农(肇庆)生物产业技术研究院有限公司
<120> sgRNA、质粒、IRF7功能缺失的细胞系及其构建方法和应用
<160> 5
<170> SIPOSequenceListing 1.0
<210> 1
<211> 20
<212> DNA
<213> 人工序列()
<400> 1
ggtcgtcgtt gcacttggag 20
<210> 2
<211> 20
<212> DNA
<213> 人工序列()
<400> 2
ctccaagtgc aacgacgacc 20
<210> 3
<211> 119
<212> PRT
<213> 突变型IRF7(人工序列)
<400> 3
Met Ala Ala Leu Asp Ser Glu Gly Asp Ala Gln Lys Leu Arg Phe Gly
1 5 10 15
Pro Trp Leu Leu Asn Ala Val Ser Ser Gly Leu Tyr Arg Gly Leu Cys
20 25 30
Trp Ile Asp Pro Asp Arg Arg Ile Phe Arg Ile Pro Trp Lys His Asn
35 40 45
Ala Arg Lys Asp Val Thr Ser Ser Asp Val Glu Ile Phe Lys Ala Trp
50 55 60
Ala Lys Ala Ser Gly Arg Tyr Glu Gly Asn Ala Glu Asp Pro Ala Lys
65 70 75 80
Trp Lys Thr Asn Phe Arg Cys Ala Leu Arg Ser Thr His Met Phe Met
85 90 95
Leu Leu Glu Asp Arg Ser Val Gln Arg Arg Pro Ala Gln Gly Leu Arg
100 105 110
Gly Cys Leu Arg Arg Pro Gln
115
<210> 4
<211> 360
<212> DNA
<213> 编码突变型IRF7基因(人工序列)
<400> 4
atggcagcac tggacagcga gggggacgcc cagaagctgc gcttcgggcc atggctgctg 60
aacgccgtca gcagcgggct gtaccgcggc ctctgctgga tcgacccgga ccgccgtatc 120
ttccgcatcc cttggaagca caacgccagg aaggatgtca ccagcagcga cgtggagatc 180
ttcaaggcct gggcgaaggc cagcggcagg tacgagggga acgctgagga tccggccaaa 240
tggaagacca acttccgctg tgccctgagg agcactcaca tgttcatgct gctggaggac 300
cgctcagtgc aacgacgacc cgcacaaggt ctacgcggtt gcctcaggcg tccccaatga 360
<210> 5
<211> 1476
<212> DNA
<213> IRF7基因(人工序列)
<400> 5
atggcagcac tggacagcga gggggacgcc cagaagctgc gcttcgggcc atggctgctg 60
aacgccgtca gcagcgggct gtaccgcggc ctctgctgga tcgacccgga ccgccgtatc 120
ttccgcatcc cttggaagca caacgccagg aaggatgtca ccagcagcga cgtggagatc 180
ttcaaggcct gggcgaaggc cagcggcagg tacgagggga acgctgagga tccggccaaa 240
tggaagacca acttccgctg tgccctgagg agcactcaca tgttcatgct gctggaggac 300
cgctccaagt gcaacgacga cccgcacaag gtctacgcgg ttgcctcagg cgtccccaat 360
gacagaggtt ctgggggccc tgtggcaggc gccctgcaac agcagccgca gctgttgctc 420
aaccaccacg atttggcctt ggaaaacact cccacagaca gtactgaagg tgttgctgca 480
gcagccctga cgcaggtgga tttggacctg ctgcagtccg tactgcagca ctgcaacatc 540
tctgccctcg gctcccagcc aaccctgtgg gcacacacag gggatgcctt gcctgaggat 600
gctctgctgc ttcctggcca agatggctgc ctcccagggc cacagtttca ggattggaga 660
cagctggagg agcctctgct gctggggaac cagcccctca caggtggggg ctgtgggcag 720
gacggggccg gggccctccc tgtgagtgag gaatgtgcca tccctgcacc atccccggct 780
gaggagctac tcttccagtc tgccaacccc gcgcctccgc caccggcagg tgacatagga 840
gggctgcccc ccctcctgga catcactatc tactaccgag gaaagatggt ctaccatgag 900
caggtggacg acagccgctg tgtgctggcc taccagcccc tggacccggc cgtggccgag 960
cagcggctgg tgctgttccc cagccccgcg agcctgcccg accccaggca gcggcgctac 1020
actgaggact tgctggaggt ggcggggctg cggctggagc agcgtgccgg ccagctcctg 1080
gccacgcgcc tgaagaagtg caaggtcttc tgggccttgt cgcagcagct cgagggcggg 1140
gaacccccac tcaacctgct ccaccgggat caggagacca ccatcttcga cttcagggtg 1200
ttttgcacag agctccggga cttccgcgac agccgcaggg agcgctcccc cgacttcacc 1260
atcttcctct gcttcgggca gtgcttctcc agcacaaagc ccaaggagtc caagctcatc 1320
ctggtgaagc tggttcccca gttctgcgag tactggtacg agcaggtgca gcggggagga 1380
gcctcctccc tcaacagtgg caacgtcagc ctgcagctct ctgactcttt caacctcttc 1440
gagcttatcg agcaatacca catgcagaca gactga 1476
Claims (9)
1.一种用于特异性靶向IRF7基因的sgRNA,其特征在于,所述sgRNA序列如SEQ ID NO.1和SEQ ID NO.2所示。
2.一种CRISPR/Cas9敲除IRF7基因的质粒,其特征在于,所述质粒含有sgRNA,所述如sgRNA的序列如SEQ ID NO.1和SEQ ID NO.2所示。
3.根据权利要求2所述的CRISPR/Cas9敲除IRF7基因的质粒,其特征在于,所述质粒由所述sgRNA和pX459载体连接得到。
4.一种IRF7功能缺失的细胞系的构建方法,其特征在于,包括如下步骤:
步骤1:构建如权利要求3或4所述的质粒;
步骤2:将所述质粒转染至宿主细胞,得到转染细胞;
步骤3:将转染细胞培养筛选得到IRF7功能缺失的细胞系;
所述宿主细胞为DF-1细胞。
5.根据权利要求4所述的IRF7功能缺失的细胞系的构建方法,其特征在于,所述步骤1具体为:
步骤11:构建两端加上酶切位点的sgRNA,得到引物;
步骤12:将引物磷酸化修饰和退火;
步骤13:将通过Bbsl酶切的pX459载体与引物连接,并转化进入到转化DH5α感受态细菌;
步骤14:挑取步骤13转化得到的细菌进行单克隆细菌扩增培养,分离得到质粒pX459-sgIRF7。
6.根据权利要求5所述的IRF7功能缺失的细胞系的构建方法,其特征在于,所述步骤2具体为:
用质粒pX459-sgIRF7转染DF-1细胞;
所述步骤3具体为:
转染后的DF-1细胞培养一段时间后在培养皿内加入嘌呤霉素使其终浓度为5μg/ml,并坚持每3天用含5μg/ml的嘌呤霉素的细胞培养液更换一次,10天后改为用不含嘌呤霉素的细胞培养液每5天更换一次,直到有明显的细胞群落出现,经筛选得到IRF7功能缺失的细胞系。
7.根据权利要求6所述的IRF7功能缺失的细胞系的构建方法,其特征在于,所述转染为阳离子脂质体介导的转染。
8.一种IRF7功能缺失的DF-1细胞系,其特征在于,所述DF-1细胞系表达突变型IRF7,所述突变型IRF7的氨基酸序列如SEQ ID NO.3所示;所述DF-1细胞系含有编码所述突变型IRF7的如SEQ ID NO.4所示的核苷酸。
9.权利要求8所述的DF-1细胞系在以下至少之一中的应用:干扰素及其调控基因的全功能研究;病原微生物复制、调控、致病机制研究;抗病药物筛选。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111494484.6A CN114107303A (zh) | 2021-12-08 | 2021-12-08 | sgRNA、质粒、IRF7功能缺失的细胞系及其构建方法和应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111494484.6A CN114107303A (zh) | 2021-12-08 | 2021-12-08 | sgRNA、质粒、IRF7功能缺失的细胞系及其构建方法和应用 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114107303A true CN114107303A (zh) | 2022-03-01 |
Family
ID=80364203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111494484.6A Pending CN114107303A (zh) | 2021-12-08 | 2021-12-08 | sgRNA、质粒、IRF7功能缺失的细胞系及其构建方法和应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114107303A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114836471A (zh) * | 2022-03-24 | 2022-08-02 | 华南农业大学 | 用于敲除cFOS宿主基因的质粒、人肺癌细胞系H1299及其制备方法和用途 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110055254A (zh) * | 2019-04-28 | 2019-07-26 | 上海交通大学 | 靶向敲除鸡irf7基因的方法及其在疫苗制备中的应用 |
CN112063622A (zh) * | 2020-09-04 | 2020-12-11 | 华农(肇庆)生物产业技术研究院有限公司 | I型ifnar功能缺失的细胞系的构建方法及其应用 |
CN113717943A (zh) * | 2021-08-16 | 2021-11-30 | 扬州大学 | St irf3/irf7 ko细胞系及其构建方法和应用 |
-
2021
- 2021-12-08 CN CN202111494484.6A patent/CN114107303A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110055254A (zh) * | 2019-04-28 | 2019-07-26 | 上海交通大学 | 靶向敲除鸡irf7基因的方法及其在疫苗制备中的应用 |
CN112063622A (zh) * | 2020-09-04 | 2020-12-11 | 华农(肇庆)生物产业技术研究院有限公司 | I型ifnar功能缺失的细胞系的构建方法及其应用 |
CN113717943A (zh) * | 2021-08-16 | 2021-11-30 | 扬州大学 | St irf3/irf7 ko细胞系及其构建方法和应用 |
Non-Patent Citations (3)
Title |
---|
CHENGWEI XIANG 等: "Transcriptomic Analysis and Functional Characterization Reveal the Duck Interferon Regulatory Factor 1 as an Important Restriction Factor in the Replication of Tembusu Virus", FRONT MICROBIOL, vol. 11, 26 August 2020 (2020-08-26), pages 2 * |
刘云霞: "鸡IRF1激活β干扰素和抗病毒作用的研究", 中国优秀硕士学位论文全文数据库 农业科技辑, 15 June 2020 (2020-06-15), pages 5 - 5 * |
芦冬 等: "Viperin在抗病毒免疫中的作用研究进展", 动物医学进展, vol. 41, no. 5, 20 June 2017 (2017-06-20), pages 92 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114836471A (zh) * | 2022-03-24 | 2022-08-02 | 华南农业大学 | 用于敲除cFOS宿主基因的质粒、人肺癌细胞系H1299及其制备方法和用途 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107502608B (zh) | 用于敲除人ALDH2基因的sgRNA、ALDH2基因缺失细胞株的构建方法及应用 | |
JP7418470B2 (ja) | オリジアス由来のトランスポザーゼを用いた核酸コンストラクトの真核細胞への組み込み | |
CN108690845B (zh) | 基因组编辑系统和方法 | |
Daròs et al. | A chloroplast protein binds a viroid RNA in vivo and facilitates its hammerhead‐mediated self‐cleavage | |
JP5735927B2 (ja) | タンパク質生産の増強のためのmRNAの一次構造の再操作 | |
CN114787357A (zh) | 用于编辑靶标rna的添加了功能性区域的反义型指导rna | |
KR20220054434A (ko) | 신규한 crispr dna 표적화 효소 및 시스템 | |
CN112063622A (zh) | I型ifnar功能缺失的细胞系的构建方法及其应用 | |
JP7189224B2 (ja) | Anp32蛋白質の宿主体内でのインフルエンザウィルスポリメラーゼ活性の維持への使用 | |
Yokomizo et al. | Rabies virus glycoprotein expression in Drosophila S2 cells. I. Functional recombinant protein in stable co‐transfected cell line | |
AU2020101084A4 (en) | A long non-coding RNA porcine Lnc-000649 and its application | |
Kimura et al. | Characterization of zoospore type IV pili in Actinoplanes missouriensis | |
Sýkora et al. | Transcription apparatus of the yeast virus-like elements: Architecture, function, and evolutionary origin | |
CN116162609A (zh) | Cas13蛋白、CRISPR-Cas系统及其应用 | |
CN114107303A (zh) | sgRNA、质粒、IRF7功能缺失的细胞系及其构建方法和应用 | |
MXPA04005717A (es) | Sistema de expresion. | |
CN117159748B (zh) | Tmprss12基因在制备预防或治疗新型冠状病毒感染药物的应用 | |
CN113717943A (zh) | St irf3/irf7 ko细胞系及其构建方法和应用 | |
CN110699487B (zh) | 用于诊断禽白血病病毒肿瘤发生的反义rna及制备方法、应用和构建过表达载体的引物 | |
JP2020508693A (ja) | C2c1エンドヌクレアーゼを含むゲノム編集用組成物およびこれを用いたゲノム編集方法 | |
CN114836418A (zh) | 用于敲降猪流行性腹泻病毒的CRISPR-Cas13d系统 | |
CN116355877A (zh) | Cas13蛋白、CRISPR-Cas系统及其应用 | |
Bi et al. | Molecular cloning, characterization, and expression of duck 2′-5′-oligoadenylate synthetase-like gene | |
EP4269585A1 (en) | Guide rna for editing polyadenylation signal sequence of target rna | |
EP4123029A1 (en) | In-vitro transcript mrna and pharmaceutical composition comprising same |
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 |