Impact of altered methylation in cytokine signaling and proteasome function in alcohol and viral-mediated diseases.

Alcoholism, Clinical and Experimental Research
Kusum K KharbandaNatalia A Osna

Abstract

Data from several laboratories have shown that ethanol (EtOH) feeding impairs many essential methylation reactions that contribute to alcoholic liver disease (ALD). EtOH is also a comorbid factor in the severity of hepatitis C virus-induced liver injury. The presence of viral proteins further exacerbates the methylation defects to disrupt multiple pathways that promote the pathogenesis of liver disease. This review is a compilation of presentations that linked the methylation reaction defects with proteasome inhibition, decreased antigen presentation, and impaired interferon (IFN) signaling in the hepatocytes and dysregulated TNFα expression in macrophages. Two therapeutic modalities, betaine and S-adenosylmethionine, can correct methylation defects to attenuate many EtOH-induced liver changes, as well as improve IFN signaling pathways, thereby overcoming viral treatment resistance.

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Citations

Feb 13, 2013·Substance Abuse : Research and Treatment·Stephanie L YahnM Foster Olive
May 21, 2014·Experimental and Molecular Pathology·Kusum K KharbandaDean J Tuma
Oct 21, 2016·Alcoholism, Clinical and Experimental Research·Murali GanesanKusum K Kharbanda
Oct 28, 2016·World Journal of Gastroenterology : WJG·Natalia A OsnaKusum K Kharbanda

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