期刊
JOURNAL OF BIOLOGICAL CHEMISTRY
卷 295, 期 3, 页码 800-807出版社
ELSEVIER
DOI: 10.1074/jbc.AC119.010366
关键词
hepatitis B virus (HBV; Hep B); epidermal growth factor receptor (EGFR); infection; endocytosis; virus entry; entry; sodium taurocholate cotransporting polypeptide (NTCP); endosomal sorting complex required for transport (ESCRT); viral translocation; receptor tyrosine kinase
资金
- Japan Society for the Promotion of Science KAKENHI [JP17H04085, JP19K16672, JP19J21455]
- Japan Science and Technology Agency (JST) Core Research for Evolutional Science and Technology (CREST)
- Japan Science and Technology Agency (JST) MIRAI program
- Japan Agency for Medical Research and Development (AMED) [JP19fk0310114j0003, JP19fk0310101j1003, JP19fk0310103j0203, JP19fm0208019j0003, JP19fk0210036j0002]
- Takeda Science Foundation
- Yasuda Medical Foundation
- Smoking Research Foundation
- Mochida Memorial Foundation for Medical and Pharmaceutical Research
- Mitsui Life Social Welfare Foundation
- Kyushu University Qdai-jump Research Program
Sodium taurocholate cotransporting polypeptide (NTCP) is expressed at the surface of human hepatocytes and functions as an entry receptor of hepatitis B virus (HBV). Recently, we have reported that epidermal growth factor receptor (EGFR) is involved in NTCP-mediated viral internalization during the cell entry process. Here, we analyzed which function of EGFR is essential for mediating HBV internalization. In contrast to the reported crucial function of EGFR-downstream signaling for the entry of hepatitis C virus (HCV), blockade of EGFR-downstream signaling proteins, including mitogen-activated protein kinase (MAPK), phosphoinositide 3-kinase (PI3K), and signal transducer and activator of transcription (STAT), had no or only minor effects on HBV infection. Instead, deficiency of EGFR endocytosis resulting from either a deleterious mutation in EGFR or genetic knockdown of endocytosis adaptor molecules abrogated internalization of HBV via NTCP and prevented viral infection. EGFR activation triggered a time-dependent relocalization of HBV preS1 to the early and late endosomes and to lysosomes in concert with EGFR transport. Suppression of EGFR ubiquitination by site-directed mutagenesis or by knocking down two EGFR-sorting molecules, signal-transducing adaptor molecule (STAM) and lysosomal protein transmembrane 4? (LAPTM4B), suggested that EGFR transport to the late endosome is critical for efficient HBV infection. Cumulatively, these results support the idea that the EGFR endocytosis/sorting machinery drives the translocation of NTCP-bound HBV from the cell surface to the endosomal network, which eventually enables productive viral infection.
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