Bcl-2 inhibits selective oxidation and externalization of phosphatidylserine during paraquat-induced apoptosis.
Bcl-2 inhibits selective oxidation and externalization of phosphatidylserine during paraquat-induced apoptosis.
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Bcl-2 在百草枯诱导的细胞凋亡过程中抑制磷脂酰丝氨酸的选择性氧化和外化。
DOI:
10.1152/ajpcell.1997.272.2.c675
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发表时间:
1997
期刊:
影响因子:
--
通讯作者:
Lazo,JS
中科院分区:
文献类型:
--
作者:
Fabisiak,JP;Kagan,VE;Ritov,VB;Johnson,DE;Lazo,JS
Oxidative stress is a potential component of the final common pathway leading to apoptosis following many diverse stimuli. Here, we document that the oxidant paraquat caused apoptosis in mouse 32D cells. We examined early paraquat-induced lipid peroxidation after metabolic incorporation of the oxidant-sensitive fluorescent fatty acid cis-parinaric acid (cis-PA) into phospholipids and high-performance liquid chromatography separation of specific phospholipid classes. Paraquat induced peroxidation of cis-PA primarily in phosphatidylserine (PS) and to a lesser extent in phosphatidylinositol (PI) within 2 h. The selective oxidation of PS occurred before signs of cytotoxicity and preceded the externalization of PS as assessed by annexin V binding. Overexpression of Bcl-2 afforded significant protection against paraquat-induced apoptosis, early PS and PI oxidation, and PS externalization but not the ultimate formation of high-molecular-weight DNA fragments. Therefore, both selective phospholipid peroxidation and DNA damage occurred after paraquat exposure, but only the former was specifically associated with apoptosis. We suggest Bcl-2 may inhibit oxidant-induced apoptosis by preventing the peroxidation of specific membrane phospholipids.
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影响因子:
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作者:
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通讯作者:
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通讯作者:
Grant,S
DOI:
10.1016/0005-2736(90)90058-v
发表时间:
1990-07-24
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
COMFURIUS, P;SENDEN, JMG;ZWAAL, RFA
通讯作者:
ZWAAL, RFA
影响因子:
3.6
作者:
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通讯作者:
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