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Muscle-specific expression of PPARgamma coactivator-1alpha improves exercise performance and increases peak oxygen uptake.

Calvo, Jennifer and Daniels, Thomas and Wang, Xiaomei and Paul, Angelika and Lin, Jiandie and Spiegelman, Bruce M and Stevenson, Susan and Rangwala, Shamina (2008) Muscle-specific expression of PPARgamma coactivator-1alpha improves exercise performance and increases peak oxygen uptake. Journal of Applied Physiology (Bethesda, Md. : 1985), 104 (5). pp. 1304-1312. ISSN 8750-7587

Abstract

The induction of peroxisome proliferator-activated receptor-gamma coactivator-1alpha (PGC-1alpha), a key regulator of mitochondriogenesis, is well-established under multiple physical exercise regimens, including, endurance, resistance, and sprint training. We wanted to determine if increased expression of PGC-1alpha in muscle is sufficient to improve performance during exercise in vivo. We demonstrate that muscle-specific expression of PGC-1alpha improves the performance during voluntary as well as forced exercise challenges. Additionally, PGC-1alpha transgenic mice exhibit an enhanced performance during a peak oxygen uptake exercise test, demonstrating an increased peak oxidative capacity, or whole body oxygen uptake. This increased ability to perform in multiple exercise paradigms is supported by enhanced mitochondrial function as suggested by increased mitochondrial gene expression, mitochondrial DNA, and mitochondrial enzyme activity. Thus this study demonstrates that upregulation of PGC-1alpha in muscle in vivo is sufficient to greatly improve exercise performance under various exercise paradigms as well as increase peak oxygen uptake.

Item Type: Article
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Keywords: exercise capacity; peak oxygen uptake; peroxisome proliferator-activated receptor -coactivator-1
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Date Deposited: 14 Dec 2009 13:52
Last Modified: 14 Dec 2009 13:52
URI: https://oak.novartis.com/id/eprint/837

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