为了探究培养生长不同时期的红豆杉细胞对Ce4+应答差异的机制,采用west-Blot免疫印迹法考察了1 mmol·L-1 Ce4+对培养不同时期的红豆杉细胞的细胞外信号调节蛋白激酶磷酸化(p-ERK-like)的表达变化.结果发现,悬浮培养的红豆杉细胞基础p-ERK-like的表达在整个培养周期中呈"M"型变化,分别在培养第五天和第二十一天出现两个高峰,而培养第十一天达到低谷,仅为参比值的77%.在培养的不同时间点应用Ce4+诱导后,细胞的最大p-ERK-like表达量以及到达最大量所需的时间表现出显著的差异,培养第十一天的细胞经Ce4+诱导后其p-ERK-like表达速率达高峰.结果表明,处于不同培养时期的红豆杉细胞其p-ERK-like表达存在显著差异,这可能是导致不同培养时期细胞对Ce4+产生不同应答效应的一个因素.
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