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第41卷第10期            陈红全,王建瑛. 利用可诱导表达Cas9的HeLa细胞系进行顺铂耐药性基因筛选[J].
                 2021年10月                  南京医科大学学报(自然科学版),2021,41(10):1432-1439,1452                   ·1439 ·


                  A                                         B
                               cPPT                                   -Dox,+Library          +Dox,+Library
                       psi+
                                      sgRNA
                                                               μg/mL
                           RRE     U6       EF1a   Puro
                                                               顺铂0.9
                    LTR                                LTR
                           pLKO.1⁃U6 sgRNA文库
                  C
                            sgRNA种类        克隆数
                            VDR⁃sgRNA        21
                                                               μg/mL
                            RARb⁃sgRNA       02
                                                               顺铂1.5
                            RXRb⁃sgRNA       01
                           NR5A1⁃sgRNA       01


                                      D
                                          野生克隆





                                            360       370        380        390        400
                                          突变克隆



                                            360       370        380        390        400
                   A:慢病毒sgRNA文库示意图;B:Dox诱导后,感染sgRNA文库的细胞会有抵抗顺铂的单克隆长出,未加Dox诱导的组无细胞存活(×50),
                标尺:500 μm;C:单克隆细胞经测序鉴定出sgRNA序列;D:对含有VDR⁃sgRNA的克隆进行目标基因的测序鉴定。sgRNA识别位点绿色下划
                线标记,PAM序列红色下划线标记。
                                                  图3   顺铂耐药性核受体基因的筛选
                                       Figure 3 Screening of cisplatin⁃resistant nuclear receptor genes


                过直接敲除或者过表达VDR进行正反验证,具体的                          [6] KIM S,KIM D,CHO S W,et al. Highly efficient RNA⁃
                机制也值得我们深入去解析。                                          guided genome editing in human cells via delivery of puri⁃
                                                                       fied Cas9 ribonucleoproteins[J]. Genome Res,2014,24
               [参考文献]
                                                                      (6):1012-1019
               [1] VASAN N,BASELGA J,HYMAN D M. A view on drug   [7] SHEN B,ZHANG W,ZHANG J,et al. Efficient genome
                    resistance in cancer[J]. Nature,2019,575(7782):299-
                                                                       modification by CRISPR⁃Cas9 nickase with minimal off⁃
                    309                                                target effects[J]. Nat Methods,2014,11(4):399-402
               [2] SHALEM O,SANJANA N E,HARTENIAN E,et al. Ge⁃
                                                                 [8] WANG W,YANG J,LIU H,et al. Rapid and efficient re⁃
                    nome⁃scale CRISPR⁃Cas9 knockout screening in human
                                                                       programming of somatic cells to induced pluripotent stem
                    cells[J]. Science,2014,343(6166):84-87
                                                                       cells by retinoic acid receptor gamma and liver receptor
               [3] MARRAFFINI L A,SONTHEIMER E J. CRISPR interfer⁃     homolog 1[J]. Proc Natl Acad Sci U S A,2011,108(45):
                    ence:RNA⁃directed adaptive immunity in bacteria and ar⁃
                                                                       18283-18288
                    chaea[J]. Nat Rev Genet,2010,11(3):181-190
                                                                 [9] CONG L,RAN F A,COX D,et al. Multiplex genome engi⁃
               [4] JINEK M,CHYLINSKI K,FONFARA I,et al. A program⁃
                                                                       neering using CRISPR/Cas systems[J]. Science,2013,
                    mable dual⁃RNA⁃guided DNA endonuclease in adaptive
                                                                       339(6121):819-823
                    bacterial immunity[J]. Science,2012,337(696):816-
                                                                 [10] SHEN B,ZHANG J,WU H,et al. Generation of gene⁃mod⁃
                    821
                                                                       ified mice via Cas9/RNA ⁃ mediated gene targeting[J].
               [5] GJ K,DOUDNA J A. CRISPR⁃Cas guides the future of ge⁃
                                                                       Cell Res,2013,23(5):720-723
                    netic engineering[J]. Science,2018,361(645):866-869
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