首页 > 文献资料
-
EBP50抑制HeLa细胞增殖及基质金属蛋白酶表达
与膜-细胞骨架连接蛋白(ezrin-radixin-moesin,ERM)家族结合的磷酸化蛋白50(ERM-binding phosphoprotein-50,EBP50)与肿瘤细胞迁移和增殖有密切关系,但各个研究者对EBPSO在肿瘤中所起的具体作用尚存争议[1-2].
-
光动力疗法对3T3成纤维细胞、宫颈癌HeLa细胞增殖及凋亡的影响
背景与目的光动力疗法有抑制细胞增殖的作用,这项技术利用细胞吸收光敏剂后,暴露于合适波长的光,即可产生细胞毒性反应.光动力可以通过凋亡或坏死引起细胞死亡.
-
Objectives. In order to identify the relationship between telomerase and the biological effect of radiation injury,and investigate the role of human telomerase catalytic subunit gene (hEST2) reverse transcriptase(RT) segment in the expression of telomerase activity. Methods. Tumor HeLa cells, KB cells and A431 cells were employed to measure the change in telomerase activity after 60Co ray irradiation at RNA level and protein level. Quantitative PCR and Northern blotting were used to determine the expression of hEST2 RT segment that encodes seven motifs of the human telomeres, a PCR based telomeric repeat amplification protocol (TRAP)was used to assay telomerase activity after exposure to radiation. Results. Both of telomerase activity and the expression hEST2 RT segment were decreased with increasing dosage of radiation. In addition, testing the expression of motifs domain is similar to the measurement of telomerase activity. Conclusion. The detection of the hEST2 RT segment by Northern blotting and quantitative PCR are new methods for testing telomerase activity. Furthermore, radiation can cause a dose dependent decrease in telomerase activity. The effect of radiation on telomerase is one possible reason for the death of cancer cells after irradiation.