Gossypol Inhibits Electron Transport and Stimulates ROS Generation in  Mitochondria

Arinbasarova, Anna Yu; Medentsev, Alexander G; Krupyanko, Vladimir I

Gossypol Inhibits Electron Transport and Stimulates ROS Generation in Yarrowia lipolytica Mitochondria

Anna Yu Arinbasarova, Alexander G Medentsev, Vladimir I Krupyanko^*

G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, 142290, Pushchino, Moscow Region, Pr. Nauki 5, Russia

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Identifiers and Pagination:

Year: 2012
Volume: 6
First Page: 11
Last Page: 15
Publisher ID: TOBIOCJ-6-11
DOI: 10.2174/1874091X01206010011

Article History:

Received Date: 26/8/2011
Revision Received Date: 11/1/2012
Acceptance Date: 19/1/2012
Electronic publication date: 19/3/2012
Collection year: 2012

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© Arinbasarova et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http: //creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

^* Address correspondence to this author at the G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, 142290, Pushchino, Moscow Region, Pr. Nauki 5, Russia; Tel: 7(495) 925 74 48; Fax: 7(495) 956 33 70; E-mail: krupyanko@ibpm.pushchino.ru

This work studied the effect of gossypol on the mitochondrial respiratory chain of Yarrowia lipolytica. The compound was shown to inhibit mitochondrial electron transfer and stimulate generation of reactive oxygen species. The inhibition kinetics in oxidation of various substrates (NADH, succinate, α-glycerophosphate and pyruvate + malate) by isolated mitochondria was investigated. Analysis of the kinetic parameters showed gossypol to inhibit two fragments of the mitochondrial electron transfer chain: a) between coenzyme Q and cytochrome b with K_IIIi of 118.3 μM (inhibition by the noncompetitive type), and b) at the level of exogenous NADH dehydrogenase with of K_Ii 17.2 μM (inhibition by the mixed type).

Keywords: Gossypol, ROS production, Kinetics of inhibition, Mitochondria, Yarrowia lipolytica.

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RESEARCH ARTICLE

Gossypol Inhibits Electron Transport and Stimulates ROS Generation in Yarrowia lipolytica Mitochondria

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Abstract

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