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首页> 外文期刊>Cell biology international. >Apoptosis, redifferentiation and arresting proliferation simultaneously triggered by oxidative stress in human hepatoma cells.
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Apoptosis, redifferentiation and arresting proliferation simultaneously triggered by oxidative stress in human hepatoma cells.

机译:人肝癌细胞中的氧化应激同时触发凋亡,再分化和阻滞增殖。

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摘要

The effects of oxidative stress (ascorbic acid-ferrous system) on the proliferation, differentiation and apoptosis of the human hepatoma cell SMMC-7721 were studied. Oxidative stress significantly inhibited cell proliferation and induced morphological differentiation. Whatever the indices related with cell malignancy, such as alpha-fetoprotein and c-glutamyltranspeptidase or the index related with cell differentiation, such as tyrosine-alpha-ketoglutarate transaminase, all inclined evidently to normalization. The tumour's clonogenic potential decreased significantly. Moreover, together with differentiation, the phenomenon of apoptosis was found by the appearance of apoptotic bodies, detached cells, and apoptotic morphological feature. Although, their DNA was not degraded into oligonucleosomal fragmentation, the DNA was cut into larger fragments (about 21.2 kbp) of a size associated with chromatin loops. These findings indicated that oxidative stress can induce both differentiation and apoptosis simultaneously in tumour cells. All the results showed that oxidative stress may initiate the tumour cells reverse transformation. The possible mechanism of the differentiation and apoptosis induced by oxidative stress may be related to the lipid peroxidation of cell membrane. Copyright 1998 Academic Press.
机译:研究了氧化应激(抗坏血酸-亚铁系统)对人肝癌细胞SMMC-7721增殖,分化和凋亡的影响。氧化应激显着抑制细胞增殖并诱导形态分化。无论是与细胞恶性肿瘤相关的指标(例如甲胎蛋白和c-谷氨酰转肽酶),还是与细胞分化相关的指标(例如酪氨酸-α-酮戊二酸转氨酶),都明显倾向于标准化。肿瘤的克隆潜力明显降低。而且,与分化一起,通过凋亡小体的出现,细胞的分离以及凋亡的形态学特征发现了凋亡现象。尽管它们的DNA未被降解为寡核小体片段,但该DNA被切成与染色质环相关的较大片段(约21.2 kbp)。这些发现表明氧化应激可以在肿瘤细胞中同时诱导分化和凋亡。所有结果表明,氧化应激可能启动了肿瘤细胞的反向转化。氧化应激诱导的分化和凋亡的可能机制可能与细胞膜脂质过氧化有关。版权所有1998学术出版社。

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