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J Dairy Sci. 2019 Jul;102(7):5899-5912. doi: 10.3168/jds.2018-16033. Epub 2019 May 15.

Preventive effect of Lactobacillus plantarum KSFY02 isolated from naturally fermented yogurt from Xinjiang, China, on d-galactose-induced oxidative aging in mice.

Author information

1
Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China.
2
Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China; College of Food Science, Southwest University, Chongqing 400715, China.
3
Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China; Department of Food Science and Biotechnology, Cha University, Seongnam, Gyeonggi 13488, Korea.
4
Department of Nutrition and Food Hygiene, School of Public Health, Guilin Medical University, Guilin, Guangxi 541004, China. Electronic address: songjiale@glmc.edu.cn.
5
Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China; Department of Food Science and Biotechnology, Cha University, Seongnam, Gyeonggi 13488, Korea. Electronic address: kunypark@cha.ac.kr.

Abstract

Yogurt from Xinjiang, China, is a traditional and naturally fermented food, and abundant microorganisms are produced during its fermentation process. In this study, we carried out in vivo animal experiments to explore the effect of a newly isolated lactic acid bacterial strain, Lactobacillus plantarum KSFY02 (LP-KSFY02), on oxidative aging. We used d-galactose to induce oxidative aging in mice and analyzed the serum and tissues of those mice using molecular biology detection methods. The results showed that LP-KSFY02 could inhibit the decreases in the thymic, cerebral, cardiac, liver, spleen, and kidney indices of mice caused by oxidative aging. The LP-KSFY02 strain increased activity of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and glutathione (GSH) and reduced levels of nitric oxide (NO) and malondialdehyde in the serum, liver, and spleen of the oxidative aging mice. Pathological observation demonstrated that LP-KSFY02 alleviated damage to the liver and spleen of oxidative aging mice. Quantitative PCR showed that LP-KSFY02 effectively upregulated mRNA expression of neuronal nitric oxide synthase (Nos1), endothelial nitric oxide synthase (Nos3), copper/zinc superoxide dismutase (Sod1), manganese superoxide dismutase (Sod2), catalase (Cat), heme oxygenase-1 (Hmox1), nuclear factor erythroid 2 related factor 2 (Nfe2l2), γ-glutamylcysteine synthetase (Gclm), and quinone oxidoreductase 1 (Nqo1) in mouse liver and spleen and downregulated expression of inducible nitric oxide synthase (Nos2). Western blot analysis revealed that LP-KSFY02 effectively upregulated protein expression of SOD1, SOD2, CAT, GSH1, and GSH2 in mouse liver and spleen tissues. Therefore, LP-KSFY02 can effectively prevent d-galactose-induced oxidative aging in mice. Its efficacy was superior to that of Lactobacillus delbrueckii ssp. bulgaricus (LDSB) and vitamin C, which are commonly used in the medical field as antioxidants. Thus, LP-KSFY02 is a high-quality strain with probiotic potential.

KEYWORDS:

Lactobacillus plantarum; d-galactose; mRNA expression; protein expression; superoxide dismutase

PMID:
31103296
DOI:
10.3168/jds.2018-16033

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