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In this work the influence of phenolic acids on ROS production in mitochondria and neutrophils was investigated.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>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<jats:sup>+<\/jats:sup>-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\u2013mass spectrometry.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>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 <jats:italic>p<\/jats:italic>-hydroxyphenyllactic acids, <jats:italic>Clostridia s.<\/jats:italic> produced great quantities of phenylpropionic and <jats:italic>p<\/jats:italic>-hydroxyphenylpropionic acids, p-hydroxyphenylacetic acid was produced by <jats:italic>Pseudomonas aeruginosa<\/jats:italic> and <jats:italic>Acinetobacter baumanii<\/jats:italic>; and benzoic acid, by <jats:italic>Serratia marcescens<\/jats:italic>.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p>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.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/1423-0127-19-89","type":"journal-article","created":{"date-parts":[[2012,10,12]],"date-time":"2012-10-12T16:14:02Z","timestamp":1350058442000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":167,"title":["Effect of phenolic acids of microbial origin on production of reactive oxygen species in mitochondria and neutrophils"],"prefix":"10.1186","volume":"19","author":[{"given":"Natalia","family":"Beloborodova","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Iskander","family":"Bairamov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrei","family":"Olenin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Victoria","family":"Shubina","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vera","family":"Teplova","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nadezhda","family":"Fedotcheva","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2012,10,12]]},"reference":[{"key":"438_CR1","doi-asserted-by":"publisher","first-page":"211","DOI":"10.1002\/path.2274","volume":"214","author":"S Sriskandan","year":"2008","unstructured":"Sriskandan S, Altmann DM: The immunology of sepsis. 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