ArticleMicrobiology and immunology2026
Hepatitis C Virus Enhances Lysosome-Associated Membrane Protein 2 A Transcription Through Nuclear Factor Erythroid 2-Related Factor 2 to Support Viral Replication.
Article in Microbiology and immunology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
Hepatitis C virus (HCV) establishes persistent infection by rewiring host stress-response pathways. Chaperone-mediated autophagy (CMA) contributes to HCV replication, but it remains unclear whether HCV regulates lysosome-associated membrane protein 2 A (LAMP-2A), the rate-limiting receptor for CMA. Here, we examined LAMP-2A regulation in HCV-infected Huh-7.5 cells. HCV infection increased LAMP-2A promoter activity, mRNA, and protein abundance, indicating transcriptional upregulation. Among candidate stress-responsive transcription factors, nuclear factor erythroid 2-related factor 2 (NRF2), hypoxia-inducible factor 1α (HIF-1α), and nuclear factor of activated T cells 1 (NFAT1) were elevated in infected cells. However, promoter mutagenesis identified NRF2 as the principal direct regulator. Mutation of the NRF2-responsive antioxidant response element markedly reduced basal and HCV-induced LAMP-2A promoter activity. Chromatin immunoprecipitation assays revealed NRF2 association with the LAMP-2A promoter, and HCV infection increased nuclear accumulation and Ser40 phosphorylation of NRF2. Functionally, shRNA-mediated knockdown of LAMP-2A reduced intracellular HCV RNA and protein levels. These findings identify an NRF2-LAMP-2A regulatory axis engaged during HCV infection and support a model in which HCV upregulates LAMP-2A to establish a cellular environment favorable for viral replication.
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