Title : Inflammation, Immune Cells, And Liver Cancer
link : Inflammation, Immune Cells, And Liver Cancer
Inflammation, Immune Cells, And Liver Cancer
Chronic inflammation due to non-alcoholic fatty liver disease alters immune cells, resulting in more cells that produce factors that suppress anti-cancer immunity, therefore increasing the risk for liver cancer. Note that non-alcoholic fatty liver disease is associated with metabolic syndrome, which is itself associated with being overweight/obese. An association between poor weight control and liver cancer> You do the math. Abstract:
The role of adaptive immunity in early cancer development is controversial. Here we show that chronic inflammation and fibrosis in humans and mice with non-alcoholic fatty liver disease is accompanied by accumulation of liver-resident immunoglobulin-A-producing (IgA+) cells. These cells also express programmed death ligand 1 (PD-L1) and interleukin-10, and directly suppress liver cytotoxic CD8+ T lymphocytes, which prevent emergence of hepatocellular carcinoma and express a limited repertoire of T-cell receptors against tumour-associated antigens. Whereas CD8+ T-cell ablation accelerates hepatocellular carcinoma, genetic or pharmacological interference with IgA+ cell generation attenuates liver carcinogenesis and induces cytotoxic T-lymphocyte-mediated regression of established hepatocellular carcinoma. These findings establish the importance of inflammation-induced suppression of cytotoxic CD8+ T-lymphocyte activation as a tumour-promoting mechanism.
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