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Apolipoprotein Promotes Hepatitis B Virus Infection

by Colleen Fleiss on August 9, 2019 at 9:55 AM

Apolipoprotein Promotes Hepatitis B Virus Infection
Targeting human apolipoprotein E (apoE) was found to be the key to eliminating hepatitis B virus, according to a study published in the open-access journal PLOS Pathogens by Luhua Qiao and Guangxiang (George) Luo of the University of Alabama at Birmingham School of Medicine.

The findings suggest that inhibitors interfering with apoE biogenesis, secretion, and/or binding to receptors may serve as antivirals for the elimination of chronic HBV infection.
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HBV chronically infects about 240 million people worldwide, posing a major global health problem. The virus is a common cause of liver diseases, including chronic hepatitis, steatosis, fibrosis, cirrhosis, and hepatocellular carcinoma. The current standard antiviral therapy effectively inhibits HBV replication but does not eliminate the virus. Moreover, little is known about the importance of host factors in HBV infection, assembly, and release. To address this gap in knowledge, Qiao and Luo set out to determine the association of apoE with HBV and its importance in the HBV life cycle.

They found that human apoE is enriched in HBV and is incorporated onto the virus envelope. HBV infection was efficiently blocked by an apoE-specific monoclonal antibody or by silencing apoE expression and apoE gene knockout. Moreover, down-regulation of apoE expression or knockout of the apoE gene from the HBV-producing liver cells severely impaired HBV production. The authors speculate that apoE may play a role in persistent HBV infection by evading host immune responses, similar to its role in the HCV life cycle.

Source: Eurekalert
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