中国实验诊断学
中國實驗診斷學
중국실험진단학
CHINESE JOURNAL OF LABORATORY DIAGNOSIS
2015年
4期
543-546
,共4页
胃癌%多药耐药%shRNA
胃癌%多藥耐藥%shRNA
위암%다약내약%shRNA
Gastric cancer%Multidrug resistance%short hairpin RNA
目的:利用短发夹 RNA (short hairpin RNA,shRNA)技术沉默多药耐药基因1(multidrug resistance, MDR1),探讨其对 SGC7901/ L-OHP 细胞株多药耐药性的逆转作用。方法采用逐步增加药物浓度法建立耐奥沙利铂(oxaliplatin,L-OHP)的胃癌细胞株 SGC7901/L-OHP,用 shRNA 技术沉默 MDR1基因在 SGC7901/ L-OHP 细胞中的表达,以 real-time PCR 检测细胞中 MDR1 mRNA 的表达,Western blot 检测细胞中 P 糖蛋白(P-glycopmtein, P-gp)的表达,MTT 法检测转染后 SGC7901/L-OHP 细胞对 L-OHP 和5-FU 的敏感性。结果 shRNA 沉默SGC7901/ L-OHP 细胞株 MDR1基因后,与空白组和阴性质粒组比较,MDR1 mRNA 表达抑制(P <0.01),且 P-gp表达下调(P <0.05)。干扰后的 SGC7901/L-OHP 细胞对 L-OHP 和5-FU 的敏感性显著升高(P <0.05)。结论shRNA 可有效沉默 SGC7901/ L-OHP 胃癌耐药细胞株 MDR1基因的表达,提高耐药的胃癌细胞对化疗药的敏感性。
目的:利用短髮夾 RNA (short hairpin RNA,shRNA)技術沉默多藥耐藥基因1(multidrug resistance, MDR1),探討其對 SGC7901/ L-OHP 細胞株多藥耐藥性的逆轉作用。方法採用逐步增加藥物濃度法建立耐奧沙利鉑(oxaliplatin,L-OHP)的胃癌細胞株 SGC7901/L-OHP,用 shRNA 技術沉默 MDR1基因在 SGC7901/ L-OHP 細胞中的錶達,以 real-time PCR 檢測細胞中 MDR1 mRNA 的錶達,Western blot 檢測細胞中 P 糖蛋白(P-glycopmtein, P-gp)的錶達,MTT 法檢測轉染後 SGC7901/L-OHP 細胞對 L-OHP 和5-FU 的敏感性。結果 shRNA 沉默SGC7901/ L-OHP 細胞株 MDR1基因後,與空白組和陰性質粒組比較,MDR1 mRNA 錶達抑製(P <0.01),且 P-gp錶達下調(P <0.05)。榦擾後的 SGC7901/L-OHP 細胞對 L-OHP 和5-FU 的敏感性顯著升高(P <0.05)。結論shRNA 可有效沉默 SGC7901/ L-OHP 胃癌耐藥細胞株 MDR1基因的錶達,提高耐藥的胃癌細胞對化療藥的敏感性。
목적:이용단발협 RNA (short hairpin RNA,shRNA)기술침묵다약내약기인1(multidrug resistance, MDR1),탐토기대 SGC7901/ L-OHP 세포주다약내약성적역전작용。방법채용축보증가약물농도법건립내오사리박(oxaliplatin,L-OHP)적위암세포주 SGC7901/L-OHP,용 shRNA 기술침묵 MDR1기인재 SGC7901/ L-OHP 세포중적표체,이 real-time PCR 검측세포중 MDR1 mRNA 적표체,Western blot 검측세포중 P 당단백(P-glycopmtein, P-gp)적표체,MTT 법검측전염후 SGC7901/L-OHP 세포대 L-OHP 화5-FU 적민감성。결과 shRNA 침묵SGC7901/ L-OHP 세포주 MDR1기인후,여공백조화음성질립조비교,MDR1 mRNA 표체억제(P <0.01),차 P-gp표체하조(P <0.05)。간우후적 SGC7901/L-OHP 세포대 L-OHP 화5-FU 적민감성현저승고(P <0.05)。결론shRNA 가유효침묵 SGC7901/ L-OHP 위암내약세포주 MDR1기인적표체,제고내약적위암세포대화료약적민감성。
Objective To silence the expression of multidrug resistance (MDR1)gene in SGC7901/L-OHP cell line by using short hairpin RNA (shRNA)in order to reverse its resistance to MDR1.Methods A human drug-resistance gastric cancer cell line,SGC7901/L-OHP,was generated by continuous exposure to gradually increasing concentrations of L-OHP.MDR1 gene expression in SGC7901/ L-OHP cells was inhibited by using shRNA.The expression of MDR1 mRNA in SGC7901/ L-OHP cells was assayed by real-time PCR.The P-gp protein expression was determined by Western blot analysis.The sensitivity to L-OHP and 5-FU was measured by MTT assay in SGC7901/L-OHP cells after shRNA.Results Compared with the control group and negative plasmid group,the expression of MDR1 mRNA and P-gp were reduced obviously after silencing the expression of MDR1 gene in SGC7901/ L-OHP cell line by using shRNA (P <0.01,P <0.05).The sensitivity of SGC7901/L-OHP cells to L-OHP and 5-FU increased significantly af-ter the interference (P <0.05).Conclusion shRNA can effectively inhibit the expression of MDR1 gene in SGC7901/L-OHP cell line and improve the sensitivity of gastric cancer cells to chemotherapy drugs.