VSL#3 probiotic treatment attenuates fibrosis without changes in steatohepatitis in a diet-induced nonalcoholic steatohepatitis model in mice.
VSL#3 probiotic treatment attenuates fibrosis without changes in steatohepatitis in a diet-induced nonalcoholic steatohepatitis model in mice.
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DOI:
10.1002/hep.22711
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发表时间:
2009-03
期刊:
影响因子:
13.5
通讯作者:
Szabo, Gyongyi
中科院分区:
文献类型:
--
作者:
Velayudham, Arumugam;Dolganiuc, Angela;Ellis, Michael;Petrasek, Jan;Kodys, Karen;Mandrekar, Pranoti;Szabo, Gyongyi
Non-alcoholic fatty liver disease (NAFLD) and its advanced stage, non-alcoholic steatohepatitis (NASH), are the most common causes of chronic liver disease in the United States. NASH features the metabolic syndrome, inflammation, and fibrosis. Probiotics exhibit immunoregulatory and anti-inflammatory activity. We tested the hypothesis that probiotic VSL#3 may ameliorate the methionine-choline-defficient (MCD) diet-induced mouse model of NASH. MCD diet resulted in NASH in C57Bl6 mice compared to methionine-choline supplemented (MCS) diet feeding evidenced by liver steatosis, increased triglycerides, inflammatory cell accumulation, increased TNFα, and fibrosis. VSL#3 failed to prevent MCD-induced liver steatosis or inflammation. MCD diet, even in the presence of VSL#3, induced upregulation of serum endotoxin and expression the TLR4 signaling components, including CD14 and MD2, MyD88 adaptor, and NF-κB activation. In contrast, VSL#3 treatment ameliorated MCD diet-induced liver fibrosis resulting in diminished accumulation of collagen and α-SMA. We identified increased expression of liver PPARs and decreased expression of pro-collagen and matrix metalloproteinases in mice fed MCD+VSL#3 compared to MCD diet alone. MCD diet triggered up-regulation of TGFβ, a known pro-fibrotic agent. In the presence of VSL#3 the MCD diet-induced expression of TGFβ was maintained, however, the expression of Bambi, a TGFβ pseudoreceptor with negative regulatory function, was increased. In summary, our data indicate that VSL#3 modulates liver fibrosis but does not protect from inflammation and steatosis in NASH. The mechanisms of VSL#3-mediated protection from MCD diet-induced liver fibrosis likely include modulation of collagen expression and impaired TGFβ signaling owed to modulation of TGFβ signaling.
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影响因子:
20.1
作者:
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通讯作者:
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影响因子:
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DOI:
10.1152/ajpgi.2000.279.1.g7
发表时间:
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作者:
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