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Mini Review Open Access
Volume 2 | Issue 1 | DOI: https://doi.org/10.46439/aging.2.006

Age-associated hepatic steatosis and liver proliferation in NAFLD

  • 1Professor of Pediatric General and Thoracic Surgery, Director of Liver Tumor Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, 45229, United States
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Corresponding Author

Nikolai Timchenko, Nikolai.Timchenko@cchmc.org

Received Date: July 13, 2020

Accepted Date: September 07, 2020

Abstract

Non-Alcoholic Fatty Liver Disease (NAFLD) is the growing epidemic which is rapidly increasing in USA. Elderly people are the most affected population which suffers from NAFLD. The earliest stage of NAFLD, hepatic steatosis has no evidence of liver injury, but is characterized by an accumulation of triglycerides in hepatocytes. Hepatic steatosis progresses in age-dependent manner to non-alcoholic steatohepatitis (NASH) and cirrhosis. Mechanisms of development of age associated NAFLD are not well understood and approaches to treat this disease are not developed. Recent studies within last three years; however, provided several lines of evidence showing that although hepatic steatosis strongly correlates with development of NAFLD, it might be not a cause of next steps of NAFLD: fibrosis and NASH. Moreover, some reports suggest that hepatic steatosis might play a protective role in development of fibrosis and NASH. Recent studies of NAFLD in animal models showed that the increase of liver proliferation is the first event in high-fat diet-induced NAFLD. Consistent with these findings, several studies showed that inhibition of liver proliferation in animal models of NAFLD inhibits age-associated hepatic steatosis, fibrosis and cancer. This review summarizes these studies with the focus on relationships of liver proliferation, hepatic steatosis and fibrosis in NAFLD patients and in animal models of NAFLD. The review also discusses potential molecular mechanisms by which liver proliferation contributes to development of NAFLD.

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