Cardiac and skeletal muscle mitochondria have a monocarboxylate transporter MCT1

被引：123
作者：
Brooks, GA [1 ]
Brown, MA [1 ]
Butz, CE [1 ]
Sicurello, JP [1 ]
Dubouchaud, H [1 ]
机构：
[1] Univ Calif Berkeley, Dept Integrat Biol, Exercise Physiol Lab, Berkeley, CA 94720 USA
来源：
JOURNAL OF APPLIED PHYSIOLOGY | 1999年 / 87卷 / 05期
关键词：
lactate shuttle; mitochondria; monocarboxylate transporter; lactate transporter; exertion; exercise;
D O I：
10.1152/jappl.1999.87.5.1713
中图分类号：
Q4 [生理学];
学科分类号：
071003 ;
摘要：
To evaluate the potential role of monocarboxylate transporter-1 (MCT1) in tissue lactate oxidation, isolated rat subsarcolemmal and interfibrillar cardiac and skeletal muscle mitochondria were probed with an antibody to MCT1. Western blots indicated presence of MCT1 in sarcolemmal membranes and in subsarcolemmal and interfibrillar mitochondria. Minimal cross-contamination of mitochondria by cell membrane fragments was verified by probing for the sarcolemmal protein GLUT-1. In agreement, immunolabeling and electron microscopy showed mitochondrial MCT1 in situ. Along with lactic dehydrogenase, the presence of MCT1 in striated muscle mitochondria permits mitochondrial lactate oxidation and facilitates function of the "intracellular lactate shuttle."
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收藏
页码：1713 / 1718
页数：6
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