Intestinal SIRT1 Deficiency Protects Mice from Ethanol-Induced Liver Injury by Mitigating Ferroptosis.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Intestinal SIRT1 Deficiency Protects Mice from Ethanol-Induced Liver Injury by Mitigating Ferroptosis."

Aberrant liver sirtuin 1 (SIRT1), a mammalian NAD-dependent protein deacetylase, is implicated in the pathogenesis of alcoholic liver disease. However, the role of intestinal SIRT1 in alcoholic liver disease is presently unknown. This study investigated the involvement of intestine-specific SIRT1 in ethanol-induced liver dysfunction in mice. Ethanol feeding studies were performed on knockout mice with intestinal specific SIRT1 deletion (SIRT1iKO) and flox control (WT) mice with a chronic-plus-binge ethanol feeding protocol. Following ethanol administration, hepatic inflammation and liver injury were substantially attenuated in the SIRT1iKO mice compared to WT mice, suggesting that intestinal SIRT1 played a detrimental role in the ethanol-induced liver injury. Mechanistically, the hepatic protective effect of intestinal SIRT1 deficiency was attributable to ameliorated dysfunctional iron metabolism, increased hepatic glutathione contents, and attenuated lipid peroxidation, along with normalization of a panel of genes implicated in the ferroptosis process in the livers of ethanol-fed mice. This study demonstrates that ablation of intestinal SIRT1 protected mice from the ethanol-induced inflammation and liver damage. The protective effects of intestinal SIRT1 deficiency are mediated, at least partially, by mitigating hepatic ferroptosis. Targeting intestinal SIRT1 or dampening hepatic ferroptosis signaling may have therapeutic potential for alcoholic liver disease in humans.


Journal Details

This article was published in the following journal.

Name: The American journal of pathology
ISSN: 1525-2191


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Medical and Biotech [MESH] Definitions

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