...
首页> 外文期刊>Meat Science >Effects of 4-hydroxy-2-nonenal on beef heart mitochondrial ultrastructure, oxygen consumption, and metmyoglobin reduction
【24h】

Effects of 4-hydroxy-2-nonenal on beef heart mitochondrial ultrastructure, oxygen consumption, and metmyoglobin reduction

机译:4-羟基-2-壬烯醛对牛肉心线粒体超微结构,耗氧量和肌红蛋白减少的影响

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

The effects of 4-hydroxy-2-nonenal (HNE) on mitochondria isolated from bovine hearts (n = 5) were assessed using ultrastructure, oxygen consumption, membrane permeability, HNE binding, and metmyoglobin reduction in vitro. Pre-incubation (pH 5.6 and 7.4 at 25 ℃) of mitochondria with HNE decreased oxygen consumption compared with samples without HNE (P<0.05). Electron microscopy revealed that HNE-treated mitochondria were swollen and had increased membrane permeability at pH 7.4, compared with ethanol controls. Conversely, mitochondria incubated with HNE at pH 5.6 had decreased volume and permeability. Fluorescence studies indicate that HNE binds to the membrane of mitochondria isolated from bovine cardiac muscle (at pH 5.6 and 7.4). HNE-treated mitochondria at both pH 5.6 and 7.4 had lower metmyoglobin reduction and NADH dependent metmyoglobin reductase activity compared with control mitochondria without HNE (P<0.05). In addition to covalent binding with myoglobin, HNE may influence beef color stability by interacting with mitochondria.
机译:使用超微结构,耗氧量,膜通透性,HNE结合和体外肌红蛋白减少评估了4-羟基-2-壬烯醛(HNE)对从牛心脏(n = 5)分离的线粒体的影响。与不含HNE的样品相比,含HNE的线粒体预孵育(pH 5.6和7.4在25℃下)可减少耗氧量(P <0.05)。电镜显示,与乙醇对照组相比,HNE处理的线粒体肿胀且在pH 7.4时膜通透性增加。相反,与HNE在pH 5.6下孵育的线粒体的体积和通透性降低。荧光研究表明,HNE与分离自牛心肌的线粒体膜结合(在pH 5.6和7.4时)。与没有HNE的对照线粒体相比,在pH 5.6和7.4的HNE处理的线粒体均具有较低的肌红蛋白还原和NADH依赖性的肌红蛋白还原酶活性(P <0.05)。除了与肌红蛋白共价结合外,HNE还可以通过与线粒体相互作用来影响牛肉的颜色稳定性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号