Background and objective: Human telomerase reverse transcriptase is the catalytic subunit of telomerase, and its activity is correlated with cell's sensitivity to chemotherapy. The aim of this study is to investigate the differential expression of human telomerase reverse transcriptase (hTERT) mRNA in human lung adenocarcinoma cell line Anip973 and Anip973/NVB, and to observe the correlation between hTERT mRNA and drug-resistance.
Methods: The real-time fluorescence quantitative RT-PCR was used to detect the change of hTERT mRNA in human lung adenocarcinoma drug-resistant cell Anip973/NVB and parental cell Anip973 treated by NVB.
Results: In the control group, the expression of hTERT mRNA showed no significant difference between drug-resistant cell Anip973/NVB and parental cell Anip973. After been treated by NVB, the expression of hTERT mRNA in parental cell was significantly decreased (P < 0.01), and drug-resistant cell Anip973/ NVB had no evidently variant (P > 0.05). The down-regulated hTERT mRNA in Anip973 cell was higher than that in Anip973/ NVB cell.
Conclusion: Telomerase correlates with the drug-resistant cell A973/NVB, and telomerase may be a new target for multi-drug resistant inversion.
背景与目的: 端粒酶逆转录酶为端粒酶的催化亚单位，其活性与细胞对化疗药物的敏感性密切相关。本实验研究人肺腺癌Anip973/NVB耐药细胞株与亲代细胞Anip973细胞株端粒酶逆转录酶（human telomerase reverse transcriptase, hTERT）的mRNA表达及差异，探讨端粒酶与耐药的相关性。
方法: 采用实时荧光定量RT-PCR法检测人肺腺癌Anip973/NVB耐药细胞与Anip973亲代细胞经NVB处理前后hTERT mRNA的表达。
结果: 对照组Anip973、Anip973/NVB细胞的hTERT mRNA表达无统计学差异；NVB处理组Anip973细胞hTERT mRNA表达明显降低（P < 0.01），而Anip973/NVB细胞hTERT mRNA表达的降低与对照组比较无统计学差异（P > 0.05），NVB处理组Anip973细胞hTERT mRNA表达降低的程度明显高于Anip973/NVB细胞（P < 0.01）。
结论: 端粒酶与肺腺癌耐药细胞的多药耐药密切相关，端粒酶有可能作为逆转耐药的新靶点。