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Updated: Apr 18, 2026

Stem Cell-Derived Viral Ag-Specific T Lymphocytes Suppress HBV Replication in Mice
Published on: September 25, 2019
Reassessing immune control of hepatitis A virus
Christopher M Walker1, Zongdi Feng1, Stanley M Lemon2
1Center for Vaccines and Immunity, Nationwide Children's Hospital, USA; College of Medicine, The Ohio State University, Columbus, OH 43205, USA.
Abstract:
There is renewed interest in hepatitis A virus (HAV) pathogenesis and immunity after 2-3 decades of limited progress. From a public health perspective, the average age at infection has increased in developing countries, resulting in more severe hepatitis that is poorly understood mechanistically. More fundamentally, there is interest in comparing immunity to HAV and hepatitis C virus (HCV): small, positive-strand RNA viruses with very different infection outcomes. Here, we review evidence that circulating HAV virions are cloaked in membranes, with consequences for induction of innate immunity and antibody-mediated neutralization. We also consider the contribution of CD4+ helper versus CD8+ cytotoxic T cells to antiviral immunity and liver injury, and present a model of non-cytotoxic immune control of HAV infection.
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