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. 2020 Sep 1;10:14349. doi: 10.1038/s41598-020-71453-5

Figure 4.

Figure 4

HBV is internalized via the EGFR endocytosis pathways. (A) The dose-dependent EGFR endocytosis pathway modulated by EGF. The illustration of EGFR monomer and dimer were referred to previous report23. (B,D,F) Relative HBV infection levels in HepG2-NTCP cells (−), HepG2-NTCP cells treated with ikarugamycin (IKA) (B), filipin (FLP) (D) and chloroquine (CQ) (F). The results are shown as the mean ± SEM of 3 independent experiments. *p < 0.05. **p < 0.01. ***p < 0.001. N.S., not significant. (C) Immunofluorescence staining for EGFR (green) and NTCP (Red) in HepG2-NTCP cells at 2 ng/ml of EGF treated with or without 2 µM IKA. Scale bar, 10 µm. (E) Immunofluorescence staining for EGFR (green) and LAMP2 (Red) in HepG2-NTCP cells at 50 ng/ml of EGF treated with or without 1 µM FLP. Scale bar, 10 µm. (F) Immunofluorescence staining for EGFR (green) and LAMP2 (Red) in HepG2-NTCP cells at 2 ng/ml and 50 ng/mL of EGF treated with 25 µM CQ. Scale bar, 10 µm.