Peroxidation-dependent and peroxidation-independent mechanisms by which acetaminophen kills cultured rat hepatocytes.

Peroxidation-dependent and peroxidation-independent mechanisms by which acetaminophen kills cultured rat hepatocytes.
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对乙酰氨基酚杀死培养的大鼠肝细胞的过氧化依赖性和过氧化非依赖性机制。

DOI:
10.1016/0003-9861(88)90072-0
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发表时间:
1988
影响因子:
3.9
通讯作者:
Rogers,SA
Rogers,SA
中科院分区:
生物学3区
文献类型:
--
作者:
Farber,JL;Leonard,TB;Kyle,ME;Nakae,D;Serroni,A;Rogers,SA

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对乙酰氨基酚通过两种不同的机制杀死由 3-甲基胆蒽诱导的雄性大鼠制备的培养肝细胞。使用 0.5 至 5 毫米对乙酰氨基酚,4 小时内的细胞死亡取决于 1,3-双(氯乙基)-1-亚硝基脲 (BCNU) 对谷胱甘肽还原酶的抑制,并伴随着细胞脂质的过氧化(通过丙二醛的积累来评估)。抗氧化剂二苯基苯二胺(DPPD)可以防止脂质过氧化和细胞死亡。相比之下,根据[3H]对乙酰氨基酚的共价结合程度评估,DPPD对对乙酰氨基酚的代谢没有影响;谷胱甘肽消耗的速度和程度;以及对乙酰氨基酚代谢物在培养基中的积累。结论是细胞膜磷脂的过氧化是0.5至5毫米对乙酰氨基酚致死损伤培养肝细胞的机制。使用 10-20 毫米对乙酰氨基酚时,4 小时时的细胞杀伤仍然取决于 BCNU。然而,随着 DPPD 保护细胞的能力下降,培养物中丙二醛的量逐渐减少。使用20毫米对乙酰氨基酚时,没有证据表明脂质过氧化,并且DPPD没有保护作用。因此,10-20mm对乙酰氨基酚致死细胞损伤的第二种机制与脂质过氧化无关,并且对抗氧化剂不敏感。
Acetaminophen killed cultured hepatocytes prepared from male rats induced with 3-methylcholanthrene by two distinct mechanisms. With 0.5 to 5 mmacetaminophen, cell killing within 4 h depended on the inhibition of glutathione reductase by 1,3-bis(chloro-ethyl)-1-nitrosourea (BCNU) and was accompanied by the peroxidation of cellular lipids as assessed by the accumulation of malondialdehyde. The antioxidant diphenylphenyl-enediamine (DPPD) prevented both the peroxidation of lipids and the death of the cells. By contrast, DPPD had no effect on the metabolism of acetaminophen as assessed by the extent of the covalent binding of [3H]acetaminophen; by the rate and extent of the depletion of glutathione; and by the accumulation of acetaminophen metabolites in the culture medium. It is concluded that the peroxidation of the phospholipids of cellular membranes is the mechanism whereby 0.5 to 5 mmacetaminophen lethally injures cultured hepatocytes. With 10–20 mmacetaminophen, cell killing at 4 h still depended on BCNU. However, the amount of malondialdehyde in the cultures progressively decreased in parallel with the decreasing ability of DPPD to protect the cells. With 20 mmacetaminophen, there was no evidence of lipid peroxidation, and DPPD had no protective effect. Thus, a second mechanism of lethal cell injury with 10–20 mmacetaminophen is independent of lipid peroxidation and insensitive to antioxidants.
DOI: 10.1016/s0021-9258(18)34490-9
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Alessandro Casinil;Massimo Giorlil;Robert;Hyland;A. Serroni;D. Gilfor;Farberg
通讯作者: Farberg
DOI: 10.1016/0003-2697(80)90118-9
发表时间: 1980-01-01
影响因子: 2.9
作者:
REED, DJ;BABSON, JR;POTTER, DW
通讯作者: POTTER, DW
DOI: 10.1016/s0021-9258(17)39218-9
发表时间: 1985-08
期刊: The Journal of biological chemistry
影响因子: --
作者:
P. E. Starke;J. Farber
通讯作者: P. E. Starke;J. Farber
1,3-双(2-氯乙基)-1-亚硝基脲在完整大鼠中增强对乙酰氨基酚的肝毒性。
DOI: 10.1016/0003-9861(88)90073-2
发表时间: 1988
影响因子: 3.9
作者:
Nakae,D;Oakes,JW;Farber,JL
通讯作者: Farber,JL
培养的大鼠肝细胞中针对过氧化氢细胞毒性的内源性防御。
DOI: --
发表时间: 1985
期刊: The Journal of biological chemistry
影响因子: --
作者:
Starke,PE;Farber,JL
通讯作者: Farber,JL