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Alpha-fetoprotein enhances the proliferation of human hepatoma cells in vitro

机译:甲胎蛋白增强体外人肝癌细胞的增殖

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Although the biological functions of alpha-fetoprotein( AFP) have been extensively studied, little is known about its effect on tumor cell growth. Our previous work has found that human AFP significantly stimulates the growth of mouse hepatoma cells in vitro. The purpose of the present study is to observe the effect of AFP on the proliferation of human hepatoma cells in vitro. Using a MTT- microculture tetrazolium assay, we found that the proliferation of human hepatoma cells was enhanced by in vitro treatment of AFP. However, the same concentrations of AFP had no effect on HL - 60 human leukemia cell proliferation, indicating that the human hepatoma cell proliferation - promoting role of AFP was not simply due to non-specific addition of exogenous protein and the proliferation enhancement of AFP showed certain tumor cell specificity. On the other hand, the growth stimulation of AFP could be diminished by rabbit anti-human AFP antibody. The anti-AFP antibody alone suppressed the growth of EEL - 7404 human hepatoma cells, not affecting HL - 60 cell proliferation. EEL - 7404 cell proliferation was not inhibited by normal rabbit immunoglobulins to demonstrate the specificity of anti-AFP effect. Taken together, it is concluded that AFP enhances the proliferation of human hepatoma cells in vitro, and this effect is seemingly mediated by an AFP/receptor autocrine pathway. [References: 27]
机译:尽管已经对甲胎蛋白(AFP)的生物学功能进行了广泛的研究,但对其对肿瘤细胞生长的影响知之甚少。我们以前的工作已经发现,人AFP可以在体外显着刺激小鼠肝癌细胞的生长。本研究的目的是观察AFP在体外对人肝癌细胞增殖的影响。使用MTT-微培养四唑鎓测定法,我们发现通过体外治疗AFP可以增强人肝癌细胞的增殖。然而,相同浓度的AFP对HL-60人白血病细胞的增殖没有影响,这表明AFP对人肝癌细胞增殖的促进作用不仅仅是由于非特异性添加外源蛋白,而且AFP的增殖增强有一定的肿瘤细胞特异性。另一方面,兔抗人AFP抗体可以减轻AFP的生长刺激。单独的抗AFP抗体抑制EEL-7404人肝癌细胞的生长,而不影响HL-60细胞的增殖。正常兔免疫球蛋白未抑制EEL-7404细胞的增殖,从而证明了抗AFP作用的特异性。两者合计,得出的结论是,AFP在体外增强人肝癌细胞的增殖,并且这种作用似乎是由AFP /受体自分泌途径介导的。 [参考:27]

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