摘要
目的 探讨PTTG (pituitarytumortransforminggene)、ESP1(estradiol stimulatedprotein 1)在A5 49、SPC A 1细胞S、G2 M期的表达。方法 用双胸苷同步化法同步化A5 49、SPC A 1细胞及MRC 5细胞,分别收集S、G2 M期总RNA ,做Real timePCR。结果 PTTG在A5 49细胞和SPC A 1细胞的S期表达比G2 M期表达高,在MRC 5细胞的在S、G2 M期中PTTG均无表达;ESP1在A5 49细胞与SPC A 1细胞及MRC 5细胞的S期表达均比G2 M期表达低。结论 PTTG在MRC 5的S、G2 M期都无表达,在A5 49、SPC A 1的S期比G2 M期表达增高,提示肿瘤细胞的染色体非整倍体与PTTG的表达增高有关;ESP1在MRC 5和A5 49、SPC A 1的S期比G2 M期表达低,说明细胞中姐妹染色体的分离主要依靠于ESP1在G2 M期被激活,而导致姐妹染色体的分离。
Objective To observe the pituitary tumor transforming gene (PTTG), estradiol-stimulated protein 1 (ESP1) expressions in S, G 2/M phases in A549, SPC-A-1 cell lines. Methods The mammalian cells for cell cycle was synchronizated by thymidine, the total RNA in the S, G 2/M phases was collected, and the total RNA was observed by Real-time PCR. Results PTTG expression in A549 and SPC-A-1 cell lines was higher in S phase than that in G 2/M phase while no PTTG expression in MRC-5 cells in S, G 2/M phases. ESP1 expression in A549, SPC-A-1, MRC-5 cell lines was lower in S phase than that in G 2/M phase. Conclusion That no PTTG in S and G 2/M phases in the normal cell line and PTTG expression in the lung cancer cell line higher in S phase than that in G 2/M phase suggested that the aneuploidy may be caused by the overexpression of PTTG. ESP1 expression was lower in S phase than G 2/M phase in all of the three cell lines, suggesting that sister chromatids separation depend on the active ESP1.
出处
《第三军医大学学报》
CAS
CSCD
北大核心
2005年第8期710-712,共3页
Journal of Third Military Medical University
