17β-雌二醇对涎腺黏液表皮样癌高转移细胞M_3SP_4的作用

The effects of 17 beta-estradiol on the proliferation and metastasis of salivary mucoepidermoid carcinoma M_3SP_4 cells

目的:研究17β雌二醇(E2)对涎腺黏液表皮样癌高转移细胞系M3SP4细胞的作用。方法:采用细胞记数法、MTT、软琼脂克隆形成法及相关癌基因免疫组织化学的方法研究17β雌二醇对M3SP4细胞的增殖和对VEGF、cerbB2、Ki67、P16的影响。结果:雌激素在10-10～10-5mol/L时对M3SP4有促进作用,其中在10-7mmol/L时对M3SP4的促增殖作用最显著,体外实验表明细胞群体倍增时间减少了10.8%,克隆形成率增加了225%,免疫组化显示VEGF、cerbB2、Ki67的表达增强,而P16的表达明显降低。体内实验,实验组裸鼠在每天给予0.0052mg/d的E2时,肿瘤细胞M3SP4的生长增加65%,转移增加了609%。VEGF、Ki67和cerbB2有较强表达,明显强于对照组;相反抑癌基因P16的表达较弱。结论:雌激素可刺激涎腺黏液表皮样癌M3SP4细胞的增殖和转移能力。

Objective:To study the effects of 17 beta-estradiol (E2) on the proliferation and metastasis potential of salivary gland mucoepidermoid carcinoma M_3SP_4 cells. Methods:The effects of E2 on the potential of proliferation and metastasis of M_3SP_4 cells were investigated by cell counting, MTT assay, clonegenetic assay, in vivo tumour growth and metastasis assay in nude mice.The expression of VEGF,c-erbB-2,Ki-67 and P16 in M_3SP_4 cells was examined by immunohistochemistry assay. Results:E2 increased the proliferation of M_3SP_4 cells at 10^-10-10^-5 mol/L. E2 at 10^-7 mol/L showed the strongest effects.After treatment with E2 at 10^-7 mol/L,the population doubling time of M_3SP_4 cells decreased by 10.8%,clonegenecity increased by 225%, VEGF,c-erbB-2 and Ki-67 expression increased,P16 decreased.In the in vivo assay,the tumour growth increased by 65% and metastasis increased by 609% in nude mice treated with E2 at 0.005 2 mg/d. Conclusion:E2 may stimulate the proliferation and metastasis potential of M_3SP_4 cells.