Time course of ROS production in skeletal muscle mitochondria from chronic heat-exposed broiler chicken

M. A.K. Azad, M. Kikusato, S. Sudo, T. Amo, M. Toyomizu

研究成果: Article査読

41 被引用数 (Scopus)

抄録

This study was designed to elucidate physiological changes of skeletal muscle mitochondria from broiler chickens (Gallus gallus) during chronic heat exposure. Chickens (19-day-old) were exposed to either constant heat stress (34°C) or kept at control temperature (24°C) for 14. days. Mitochondrial ROS production for control group showed little changes during the experimental periods, whereas that for the heat-stressed group was increased after 3, 5 and 9. days of heat exposure and returned to original levels at day 14. Mitochondrial membrane potential in state 4 for heat-stressed birds was higher than those of control birds after 3 and 5. days, but was not at day 14. Mitochondrial oxygen consumption rate in state 3 was increased after 3 and 5. days, and also returned to original levels by day 14. These results suggest that chronic heat stress induces increased ROS production in skeletal muscle mitochondria, probably via elevation of the membrane potential in state 4, resulting from enhanced oxygen consumption in the initial stage of heat exposure. These physiological changes were no longer observed at day 14, possibly because the animals had acclimatized to environmental heat stress.

本文言語English
ページ(範囲)266-271
ページ数6
ジャーナルComparative Biochemistry and Physiology - A Molecular and Integrative Physiology
157
3
DOI
出版ステータスPublished - 2010 11

ASJC Scopus subject areas

  • 生化学
  • 生理学
  • 分子生物学

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