Control of mitochondrial volume by mitochondrial metabolic water.

Louis Casteilla, Anne Devin, Audrey Carriere, Bénédicte Salin, Jacques Schaeffer, Michel Rigoulet

Université de Toulouse, UPS, UMR 5241 Métabolisme, Plasticité et Mitochondrie, BP 84 225, F-31 432 Toulouse Cedex 4, France.

Mitochondrion 2011 Nov

filter terms:

It is well-known that mitochondrial volume largely controls mitochondrial functioning. We investigate whether metabolic water produced by oxidative phosphorylation could be involved in mitochondrial volume regulation. We modulated the generation of this water in liver mitochondria and assess their volume by two independent techniques. In liver mitochondria, the mitochondrial volume was specifically decreased when no water was produced independently of energetic parameters and uncoupling activity. In all other conditions associated with water generation, there was no significant change in mitochondrial metabolic volume. Altogether these data demonstrate that mitochondrial volume is regulated, independently of energetic status, by the mitochondrial metabolic water that acts as a signal. Copyright Â© 2011 Elsevier B.V. and Mitochondria Research Society. All rights reserved. All rights reserved.

Citation

Louis Casteilla, Anne Devin, Audrey Carriere, Bénédicte Salin, Jacques Schaeffer, Michel Rigoulet. Control of mitochondrial volume by mitochondrial metabolic water. Mitochondrion. 2011 Nov;11(6):862-6