银杏黄酮苷对人巨细胞病毒感染的人脐静脉内皮细胞周期和凋亡的影响

目的:探讨人巨细胞病毒(HCMV)对人脐静脉内皮细胞(HUVEC304)细胞周期和凋亡的影响和机制及银杏黄酮苷对其感染HUVEC304的作用。方法:实验分为4组,分别为正常对照组、银杏黄酮苷组、HCMV感染组、HCMV感染加银杏黄酮苷组。采用流式细胞技术对HCMV感染的体外培养的HUVEC304及银杏黄酮苷对其作用后进行观察和分析。结果:HCMV感染HUVEC304后24h,正常对照组G0/G1期的细胞为74.4%,加入HCMV后为59.3%,较正常对照组降低20.3%(P<0·05)。正常对照组凋亡细胞为8.3%,当加入HCMV后为5.8%,较正常对照组降低30.1%(P<0·01)。银杏黄酮苷可以降低HCMV增加进入S和G2/M期的细胞,HCMV感染的细胞处在G0/G1期的为59.3%,用10-2mol/L银杏黄酮苷后被感染细胞处在G0/G1期的增加为67.5%,较感染组增加13.8%(P<0·05)。银杏黄酮苷可以增加HCMV感染的HUVEC304凋亡水平。HCMV感染后凋亡细胞为5.8%,加入10-2mol/L银杏黄酮苷后凋亡细胞为6.2%,较HCMV组升高6.9%(P<0·05)。结论:HCMV感染HUVEC304后,可以降低HUVEC304停留在G1期的细胞,使进入S和G2/M期的细胞明显增加,表明HCMV感染早期可通过增加G0/G1期细胞进入S和G2/M期,导致细胞最终表现为增殖。应用银杏黄酮苷可以促进细胞从G1期向S和G2/M期的转化和细胞的凋亡。HCMV感染HU-VEC304引起的炎性反应可能影响内皮细胞的功能,导致血栓形成、脂质代谢紊乱,最终参与动脉粥样硬化的形成。而银杏黄酮苷可促进HCMV感染HUVEC304的凋亡,抑制被感染细胞的过度增生,因而可能对防治动脉粥样硬化有一定的作用。

Effect of ginkgo flavone glycosideon on cell cycle and apoptosis of human cytomegalovirus-induced VEC304

Objective:To investigate the effects of ginkgo flavone glycosidein on proliferation and apoptosis of human cytomegalovirus(HCMV)infected VEC304. Method:The cultured HUVEC304 were divided randomly into four groups: control group, ginkgo flavone glycoside group, HCMV group and ginkgo flavone glycoside HCMV group.The effect of ginkgo flavone glycoside on HCMV-induced proliferation and apoptosis of VEC304 was assayed by flow cytometry . We investigated the effect of ginkgo flavone glycoside on HCMV-induced proliferation and apoptosis of HUVEC304. Result:Infection of HCMV enhanced the cells from G_1 phase to S phase and G_2/M phase and decreased the apoptosis of HUVEC304. Ginkgo flavone glycoside inhibited cell from G_1 phase into S phase and G_2/M phase and enhanced apoptosis of HUVEC304 significantly. Conclusion: The excessive proliferation and inflammation of HUVEC caused by HCMV infection maybe the initiative factor of AS development. Ginkgo flavone glycosidein may have benificial effects on atherosclerosis .