Effect of phenolic acids of microbial origin on production of reactive oxygen species in mitochondria and neutrophils

Journal of Biomedical Science

Nadezhda Fedotcheva³  Vera Teplova³  Victoria Shubina³  Andrei Olenin²  Iskander Bairamov¹  Natalia Beloborodova¹ 

[1] Negovsky Research Institute of General Reanimatology Russian Academy of Medical Sciences, Laboratory of Metabolism of Critical State, Moscow, Russia;Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia;Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow region, Russia

关键词: Reactive oxygen species;    Neutrophils;    Mitochondria;    Phenolic acids;    Sepsis;   

Others  :  824507
DOI  :  10.1186/1423-0127-19-89

 received in 2012-08-23, accepted in 2012-10-11,  发布年份 2012

【 摘 要 】

Background

Several low-molecular-weight phenolic acids are present in the blood of septic patients at high levels. The microbial origin of the most of phenolic acids in the human body was shown previously, but pathophysiological role of the phenolic acids is not clear. Sepsis is associated with the excessive production of reactive oxygen species (ROS) in both the circulation and the affected organs. In this work the influence of phenolic acids on ROS production in mitochondria and neutrophils was investigated.

Methods

ROS production in mitochondria and neutrophils was determined by MCLA- and luminol-dependent chemiluminescence. The rate of oxygen consumption by mitochondria was determined polarographically. The difference of electric potentials on the inner mitochondrial membrane was registered using a TPP⁺-selective electrode. The formation of phenolic metabolites in monocultures by the members of the main groups of the anaerobic human microflora and aerobic pathogenic bacteria was investigated by the method of gas chromatography–mass spectrometry.

Results

All phenolic acids had impact on mitochondria and neutrophils, the main producers of ROS in tissues and circulation. Phenolic acids (benzoic and cinnamic acids) producing the pro-oxidant effect on mitochondria inhibited ROS formation in neutrophils. Their effect on mitochondria was abolished by dithiothreitol (DTT). Phenyllactate and p-hydroxyphenyllactate decreased ROS production in both mitochondria and neutrophils. Bifidobacteria and lactobacilli produced in vitro considerable amounts of phenyllactic and p-hydroxyphenyllactic acids, Clostridia s. produced great quantities of phenylpropionic and p-hydroxyphenylpropionic acids, p-hydroxyphenylacetic acid was produced by Pseudomonas aeruginosa and Acinetobacter baumanii; and benzoic acid, by Serratia marcescens.

Conclusions

The most potent activators of ROS production in mitochondria are phenolic acids whose effect is mediated via the interaction with thiol groups. Among these are benzoic and cinnamic acids. Some phenolic acids, in particular phenyllactate and p-hydroxyphenyllactate, which decrease ROS production in mitochondria and neutrophils, can play a role of natural antioxidants. The results indicate that low-molecular weight phenolic acids of microbial origin participate in the regulation of the ROS production in both the circulation and tissues, thereby affecting the level of oxidative stress in sepsis.

【 授权许可】

   
2012 Beloborodova et al.; licensee BioMed Central Ltd.

【 图 表 】

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