Alterations in fatty acid oxidation in ischemic and reperfused myocardium.

Alterations in fatty acid oxidation in ischemic and reperfused myocardium.
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缺血和再灌注心肌中脂肪酸氧化的改变。

DOI:
10.1007/bf00223436
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发表时间:
1989
影响因子:
4.3
通讯作者:
Liedtke,AJ
Liedtke,AJ
中科院分区:
生物学3区
文献类型:
--
作者:
Huang,XQ;Liedtke,AJ

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本综述的重点是描述过量脂肪酸对缺血应激后再灌注心肌恢复的影响。在我们的研究中,对机械功能的影响是适度的,并且可能仍然难以/不可能测量,因为令人震惊的独立现象混淆了其他机械决定因素的影响,毫无疑问占主导地位。线粒体似乎能够再次使用长链脂肪酸作为首选底物,并且在恢复氧气输送的情况下可以产生正常水平的二氧化碳。这些氧化代谢的变化并没有反映在线粒体能量学的恢复上。由于电子传递和氧化磷酸化的效率低下,以及氧化磷酸化的电子传递的适度解偶联,ATP的再合成变得迟钝。这在一定程度上解释了胞质和线粒体中可交换核苷酸含量的绝对减少。恢复中的进一步损伤存在于线粒体无法通过腺嘌呤核苷酸转位酶反端口将腺嘌呤核苷酸交换到细胞质中。这些发现有助于我们对机械休克的理解,并可能对设计未来优化心肌再灌注过程中底物处理的策略有价值。
The focus of this review centered on describing the effects of excess fatty acids on myocardial recovery during reperfusion following ischemic stress. Effects on mechanical function were modest in our studies and are likely to remain difficult/impossible to measure due to the independent phenomenon of stunning which obfuscates and no doubt dominates the influences of other mechanical determinants. Mitochondria appear capable of again using long-chain fatty acids as a preferred substrate and in the presence of restored oxygen delivery can produce normal levels of CO2. These changes in oxidative metabolism are not mirrored by equal recoveries in mitochondrial energetics. Because of inefficiencies in electron transport and oxidative phosphorylation together with moderate uncoupling of electron transport from oxidative phosphorylation, ATP resynthesis is blunted. This explains in part the absolute decrease in contents of exchangeable nucleotides noted both in cytosol and mitochondria. Further impairments in recovery reside in the inability of the mitochondria to exchange adenine nucleotides into cytosol through the adenine nucleotide translocase antiport. These findings contribute to our understanding of mechanical stunning and may be of value in designing future strategies to optimize the handling of substrates during myocardial reperfusion.
通过再灌注挽救心肌的长期异常。
DOI: 10.1152/ajpheart.1981.241.4.h591
发表时间: 1981
期刊: The American journal of physiology
影响因子: --
作者:
Kloner,RA;DeBoer,LW;Darsee,JR;Ingwall,JS;Hale,S;Tumas,J;Braunwald,E
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地尔硫卓增强再灌注缺血心肌的挽救作用。
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发表时间: 1986
影响因子: 24
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流量无关的代谢减少对 11C-棕榈酸酯局部心肌清除的影响
DOI: --
发表时间: 1982
期刊: Circulation
影响因子: 37.8
作者:
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DOI: 10.1093/cvr/21.5.328
发表时间: 1987
影响因子: 10.8
作者:
Glower,DD;Spratt,JA;Newton,JR;Wolfe,JA;Rankin,JS;Swain,JL
通讯作者: Swain,JL
DOI: 10.1016/s0022-2828(86)80294-2
发表时间: 1986-10-01
影响因子: 5
作者:
NASLUND, U;HAGGMARK, S;OBERG, A
通讯作者: OBERG, A