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World J Microbiol Biotechnol. 2018 Jan 17;34(2):27. doi: 10.1007/s11274-018-2410-2.

A bioluminescent test system reveals valuable antioxidant properties of lactobacillus strains from human microbiota.

Author information

1
Laboratory of Genetics of Microorganisms, Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russian Federation. masha_marsova@mail.ru.
2
Laboratory of Genetics of Microorganisms, Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russian Federation.
3
Scientific Research Center for Biotechnology of Antibiotics "BIOAN", Moscow, Russian Federation.

Abstract

Oxidative stress cause serious damages in human organism resulting in multiple diseases. Antioxidant therapy includes diet, the use of chemical agents or commensal bacteria such as lactobacilli. This study aims to evaluate the antioxidant (AO) activity of cell-free culture supernatants of lactobacilli, isolated from different parts of the human body. A test system based on Escherichia coli MG1655 strains carrying plasmids encoding luminescent biosensors pSoxS-lux and pKatG-lux inducible by superoxide anion and hydrogen peroxide, respectively, was used to analyze cell-free culture supernatants of lactobacilli. Bioluminescent detection systems are suitable for quick screening of AO activity of lactobacilli. The majority of strains (51 out of 81) belonging to six different species demonstrated various levels of antioxidant activity. This activity was confirmed using the trolox equivalent method. The genome of one of the strains showing high AO activity was sequenced, and the genes putatively involved in AO capacity were determined. Potencies of standard AO and CFS from the most active Lactobacillus strains. Percentages of decrease in the detected luminescence (IAO%) in the presence of AO or CFS are presented. L. br.-L. brevis, L. pl. -L. plantarum, L. rh.-L. rhamnosus.

KEYWORDS:

Antioxidant activity; Lactobacillus; Probiotics; pSoxS-lux/pKatG-lux

PMID:
29344877
DOI:
10.1007/s11274-018-2410-2
[Indexed for MEDLINE]

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