Validation of the silencing site of rhesus monkey P21 gene in COS-7 cells
Received:June 09, 2014  
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KeyWord:Gene silencing;P21 gene;Rhesus monkey
李雨函 中国医学科学院医学实验动物研究所, 北京
苏静芬 中国医学科学院医学实验动物研究所, 北京
张晨 北京大学生命科学学院, 北京
石亮 中国医学科学院医学实验动物研究所, 北京
刘云波 中国医学科学院医学实验动物研究所, 北京
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      Objective To screen the effective silencing targets of P21 gene at the cellular level in rhesus monkey. Methods To detect the expression of P21 gene in COS-7 cells (derived from the kidney of African green monkey, Cercopithecus aethiops). Four small hairpin RNA (shRNA) sequences targeting rhesus monkey P21 gene were designed and inserted into lentivirus-based gene silencing constructs FUGW-TDT. The vectors were transfected into COS-7 cells respectively. The suppression of P21 mRNA was detected by real-time PCR, and the expression of P21 protein was detected by Western blot assay. Results Four gene-silencing sequences were screened that lied in 541-561 bp, 542-562 bp, 215-239 bp, and 624-648 bp of the rhesus monkey P21 mRNA. Their silencing rate was (91.82±3.21)%, (82.47±2.48)%, (81.31±2.69)% and (87.35±4.59)%, and the protein expression was (11.97±0.70)%, (20.22±0.65)%, (23.21±0.63)% and (14.42±0.86)%, respectively. Conclusions Four effective silencing target sequences are screened at cellular level, which can be used in gene silencing research of rhesus monkeys.
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