摘要
目的:肾细胞癌仍然是威胁人类生命的重要疾病,为了探索肾癌治疗的新
方法,本实验试图阐明生长激素对于肾癌细胞有无促增殖和分化作用。方法:取
对数生长期的人肾癌细胞株GRC-1,以氟尿嘧啶和/或不同浓度的rhGH体外培养,
24小时后以流式细胞仪测定细胞增殖周期和细胞凋亡等指标。结果:在空白对照
组,G0-G1期的细胞数约占52%,S期细胞数次之,G2-M期占不足40%。在生长
激素组,G0-G1期细胞数率降低(P<0. 05) ,S期细胞百分率增高(P<0. 01) 。在单纯
氟尿嘧啶组,G0-G1期细胞数增高,S期细胞数降低;同时加氟尿嘧啶和生长激
素组与单纯氟尿嘧啶组相比,G0-G1期细胞数进一步增加,S期细胞数进一步降
低。结论:因为rhGH在体外作用于GRC-1细胞,能诱导细胞分化,促使静止细
胞群进入增殖周期,并使处于DNA合成期的细胞增多,说明rhGH在体外有促
进肾癌细胞生长增殖的作用,所以,我们推断肾癌细胞膜表面可能存在生长激素
受体。氟尿嘧啶能使S期细胞数降低即抑制细胞的增殖,与氟尿嘧啶的作用机理
相符。生长激素和氟尿嘧啶合用,S期细胞数进一步降低,说明生长激素能增强
氟尿嘧啶抗肿瘤细胞生长增殖作用。
Objectives f Renal cell carcinoma sti1l is an important disease threatening
human life. TO StUdy a new method for the treatInent of renal cell carcinoma and explore
the effect of human groed hormone on cell cycle kinetics and aPoPtosis of human renal
carcinoma cell line (GRC-l cells). Methodsi GRC-1 cells were cultured fOr 24 hour in
l640 with or edout Fluorouraci, but whh rhGH at a concentration of 50,l00,200ng/nd
respeCtive1y Cells undergoing aPoptosis and differentiation wee determined by flow
cytometryGCap. Results f rhGH had significant effect on GRC-l cell cycle rate, percent
G0-G, phases dropped (P<0.05), percent S phase increased (p<0.0l). addition Qf
Fluorouraci to the culture medium could drop all rates of S phase. Addition of rhGH at
different concentration and Fluorourac to the culture medium could drop cell rates of S
phase deeply Conclusions; GRC-l cells might have exPression fOr the GH recePtor .In
vitro rhGH ndght induce differentiation of cells GRC-l and promote cell cycle kinetics
and Strengthen Fluorouraci suppressing on percent S phase.
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