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视黄酸对BEL-7402细胞酶活性及基因表达的影响
Authors
张铮
杨善民
汪德耀
陈瑞川
Publication date
5 March 1998
Publisher
Abstract
人肝癌BEL-7402细胞分别以5μmol/L、20μmol/L和50μmol/L的视黄酸(RA)处理后,细胞生长明显受抑,平均细胞群体倍增时间延长,并呈RA浓度及处理时间依赖性关系.经20μmol/LRA处理的细胞中,r-谷氨酰转肽酶(r-GT)活性自给药后第2天即持续下降,至第6天降至44.5%,而酪氨酸-α-酮戊二酸转氨酶(TAT)活性则持续增高,至第6天较对照组高近1倍.经20μmol/LRA处理5d后,RNA斑点杂交分析表明p53基因转录加强,而N-ras基因表达下降,提示该两基因的表达变化可能在BEL-7402细胞的生长抑制及逆转过程中起重要作用,有关机制尚待深入研究
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Last time updated on 16/06/2016