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Abstract Title:

[Effects of Lactobacillus paracasei N1115 combined with fructooligosaccharides on non-alcoholic fatty liver disease induced by high-fat diet in mice].

Abstract Source:

Zhonghua Gan Zang Bing Za Zhi. 2017 Dec 20 ;25(12):927-933. PMID: 29325294

Abstract Author(s):

F F Yao, P Y Zheng, H Huang, L M Bai, Y R Ding, L Mei, S M Liu

Article Affiliation:

F F Yao

Abstract:

To investigate the effects of Lactobacillus paracasei N1115 combined with fructooligosaccharides (FOS) on non-alcoholic fatty liver disease (NAFLD) in mice and its possible mechanism.A total of 50 male C57 mice were randomly and equally divided into five experimental groups. Group 1 received a normal diet (ND). Other four groups received a high-fat diet (HFD) to establish NAFLD models. In addition to HFD, group 3 received Lactobacillus paracasei N1115 (2.2×10(9) CFU/mL), group 4 received FOS (4 g/kg per day), and group 5 received Lactobacillus paracasei N1115 (2.2×10(9) CFU/mL) and FOS (4 g/kg per day). All groups received continuous intervention for 16 weeks. The following indices were measured for all groups after intervention: general condition,the levels of fasting blood glucose, insulin, and lipopolysaccharide (LPS), and the levels of tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6, and interferon (IFN)-γ in the serum and liver. The mRNA levels of Toll-like receptor (TLR)4, nuclear factor (NF)-κb, insulin receptor (InsR), and insulin receptor substrate (IRS)-1 were measured by real-time RT-PCR. The data were subjected to one-way analysis of variance and comparison between groups was made by Bonferroni method.Compared with group 2, groups 3, 4, and 5 had significantly lower body weight, Lee's index, liver index, and the levels of blood glucose and insulin resistance (<0.05). The serum level of LPS in group 2 was significantly higher than that in the other experimental groups (group 1: 8.80± 0.85 U/L, group 3: 12.31 ± 1.01 U/L, group 4: 12.27 ± 0.98 U/L, and group 5: 10.17 ± 0.79 U/L vs group 2: 15.45 ± 1.14 U/L,= 55.117,<0.001). The levels of TNF-α, IL-1β, IL-6, and IFN-γ in the serum and liver in group 2 were also significantly higher than those in the other groups (<0.05). Group 2 had significantly higher mRNA levels of TLR4 and NF-κb in the liver than the other groups (F = 82.933,<0.001;= 149.033,<0.001); however, it had significantly lower mRNA levels of InsR and IRS-1 in the liver than the other groups (= 33.347,<0.001;= 70.225,<0.001).Lactobacillus paracasei N1115 combined with FOS can reduce the level of LPS in the blood circulation, inhibit activation of the LPS/TLR4 signaling pathway, and reduce the release of inflammatory factor and the body's insulin resistance, so it can relieve NAFLD.

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Sayer Ji
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