Differential Activation of Unconventional T Cells, Including iNKT Cells, in Alcohol-Related Liver Disease.

Alcoholism, Clinical and Experimental Research
Idania MarreroVipin Kumar

Abstract

Liver is enriched in several innate-like unconventional T cells, but their role in alcohol-related liver disease (ALD) is not fully understood. Studies in several acute alcohol feeding models but not in chronic alcoholic steatohepatitis (ASH) model have shown that invariant natural killer T (iNKT) cells play a pathogenic role in ALD. Here, we investigated the activation of iNKT cells in an intragastric (iG) infusion model of chronic ASH as well as the frequency and cytokine phenotype of 3 different unconventional T cells: iNKT, mucosal-associated invariant T (MAIT), and CD8+ CD161hi Vα7.2- cells in peripheral blood of ALD patients. Hepatic iNKT cells were investigated using the iG model of chronic ASH that combines feeding of high-cholesterol/high-fat diet (HCFD) with intragastric feeding of ethanol diet (HCFD + iG Alc). Human iNKT, MAIT, and CD8+ CD161hi Vα7.2- cells were examined by flow cytometry in peripheral blood of patients with severe alcoholic hepatitis (SAH) and chronic alcoholics (ChA) and compared with healthy controls. In the iG model of chronic ASH, IFNγ+ iNKT cells accumulate in their livers compared with pair-fed control mice and activated hepatic iNKT cells show high expression of Fas and FasL. Notably, IFNγ+ i...Continue Reading

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Citations

Oct 13, 2020·Cellular & Molecular Immunology·Yongyan Chen, Zhigang Tian
Dec 4, 2020·Cellular & Molecular Immunology·Hua WangYaron Rotman

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