Ion permeability induction by the SH cross-linking reagents in rat liver mitochondria is inhibited by the free radical scavenger, butylhydroxytoluene

Ion permeability induction by the SH cross-linking reagents in rat liver mitochondria is inhibited by the free radical scavenger, butylhydroxytoluene
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自由基清除剂丁基羟基甲苯抑制大鼠肝线粒体中 SH 交联剂诱导的离子渗透性

DOI:
10.1007/bf00762412
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发表时间:
1987
影响因子:
3
通讯作者:
V. Lemeshko
V. Lemeshko
中科院分区:
生物学4区
文献类型:
--
作者:
S. Novgorodov;E. V. Kultayeva;L. Yaguzhinsky;V. Lemeshko

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研究发现,疏水性的SH交联剂氧化苯基砷(PhAsO)可诱导线粒体K+和Ca~(2+)外流,并在4态时加速呼吸。疏水性的单功能亲电剂N-乙基马来酰亚胺(N-乙基马来酰亚胺)不显示这种作用,但可阻止PhAsO的作用。极性潜在的SH交联剂(亚砷酸盐、联胺)只有在PI存在的情况下才能诱导离子通量。SH试剂诱导的离子通量可被丁基羟基甲苯(自由基反应的抑制剂)和N,N‘-二环己基碳二亚胺抑制,而不被寡霉素抑制。推测线粒体内两个并列的SH基团的交联引起的离子通量的产生与自由基反应的发生有关。
The hydrophobic, potentially SH cross-linking reagent, phenylarsine oxide (PhAsO), was found to induce K+ and Ca2+ effluxes from mitochondria and to accelerate the respiration rate in state 4. The hydrophobic monofunctional electrophilic agent,N-ethylmaleimide, does not exhibit this effect but prevents the action of PhAsO. The polar potentially SH cross-linking reagents (arsenite, diamide) induce ion fluxes only in the presence of Pi. Ion fluxes induced by the SH reagents are inhibited by butylhydroxytoluene (an inhibitor of free radical reactions), andN,N′-dicyclohexylcarbodiimide, not by oligomycin. It is inferred that the induction of ion fluxes in mitochondria caused by cross-linking of two juxtaposed SH groups is related to the development of free radical reactions.
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DOI: --
发表时间: 1984
期刊: The Journal of biological chemistry
影响因子: --
作者:
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通讯作者: Garlid,KD
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DOI: --
发表时间: 1986
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影响因子: --
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影响因子: --
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