alexa Protective effects of two Lactobacillus plantarum strains in hyperlipidemic mice.
Immunology

Immunology

Immunome Research

Author(s): Wang LX, Liu K, Gao DW, Hao JK

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Abstract AIM: To investigate the effects of Lactobacillus plantarum (L. plantarum) CAI6 and L. plantarum SC4 on hyperlipidemic mice. METHODS: Male Kunming mice were fed a high-cholesterol diet for 28 d to construct hyperlipidemic models. Hyperlipidemic mice and normal mice were assigned to 3 groups which were separately treated with L. plantarum CAI6, L. plantarum SC4, and physiological saline through oral gavage for 28 d. Total cholesterol (TC), triglycerides (TG), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) levels were measured by commercially available enzyme kits. FACS Calibur flow cytometry was used to examine hepatic and renal nuclear factor-erythroid 2-related factor 2 (Nrf2) expression. The morphology of livers was checked by hematoxylin and eosin staining and optical microscope observation. RESULTS: Compared with normal mice, hyperlipidemic mice possessed significantly higher TC (3.50 ± 0.43 vs 2.89 ± 0.36, P < 0.01), TG (1.76 ± 0.07 vs 1.10 ± 0.16, P < 0.01), and LDL-C (1.72 ± 0.20 vs 0.82 ± 0.10, P< 0.01) levels, resulting in an increase of atherogenic index (AI) (2.34 ± 1.60 vs 0.93 ± 0.55, P < 0.05) and LDL-C/HDL-C ratio (1.43 ± 0.12 vs 0.51 ± 0.16, P < 0.05). After treatment with L. plantarum CAI6/L. plantarum SC4, TG (1.43 ± 0.27/1.54 ± 0.10 vs 1.76 ± 0.07, P < 0.01/P < 0.05) and LDL-C (1.42 ± 0.07/1.47 ± 0.12 vs 1.72 ± 0.20, P < 0.01/P < 0.01) in hyperlipidemic mice significantly decreased. In addition, TC, HDL-C, AI, and LDL-C/HDL-C ratio were all positively changed. Meanwhile, the treatment markedly alleviated hepatic steatosis and significantly stimulated Nrf2 expression (73.79 ± 0.80/72.96 ± 1.22 vs 54.94 ± 1.84, P < 0.01/P < 0.01) in hepatocytes of hyperlipidemic mice. CONCLUSION: L. plantarum CAI6 and L. plantarum SC4 may protect against cardiovascular disease by lipid metabolism regulation and Nrf2-induced antioxidative defense in hyperlipidemic mice.
This article was published in World J Gastroenterol and referenced in Immunome Research

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