PMID- 15367644 OWN - NLM STAT- MEDLINE DCOM- 20041021 LR - 20191210 IS - 0022-538X (Print) IS - 1098-5514 (Electronic) IS - 0022-538X (Linking) VI - 78 IP - 19 DP - 2004 Oct TI - Cell fusion activities of Hantaan virus envelope glycoproteins. PG - 10776-82 AB - Hantaan virus (HTNV)-infected Vero E6 cells undergo cell fusion with both infected and uninfected cells under low-pH conditions. Flow cytometry and fluorescence microscopy of HTNV-infected Vero E6 cells showed that envelope glycoproteins (GPs) were located both on the cell surface and in the cytoplasm. Neutralizing monoclonal antibodies (MAbs) against the G1 and G2 envelope GPs inhibited cell fusion, whereas nonneutralizing MAbs against G1 or G2 and MAbs against the nucleocapsid protein (NP) did not. Transfected Vero E6 cells that expressed GPs but not those that expressed NP fused and formed syncytia. These results indicate that HTNV GPs act as fusogens at the cell surface. No fusion activity was observed either in infected Vero cells that were passaged more than 150 times or in BHK-21 cells, although GPs appeared to localize to the cell surface. This variability in fusion induction suggests the involvement of host cell factors in the process of cell membrane fusion. FAU - Ogino, Michiko AU - Ogino M AD - Institute for Animal Experimentation, Graduate School of Medicine, Hokkaido University, Sapporo, Japan. FAU - Yoshimatsu, Kumiko AU - Yoshimatsu K FAU - Ebihara, Hideki AU - Ebihara H FAU - Araki, Koichi AU - Araki K FAU - Lee, Byoung-Hee AU - Lee BH FAU - Okumura, Megumi AU - Okumura M FAU - Arikawa, Jiro AU - Arikawa J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (Antibodies, Monoclonal) RN - 0 (Antibodies, Viral) RN - 0 (Epitopes) RN - 0 (Glycoproteins) RN - 0 (Viral Envelope Proteins) RN - 0 (Viral Fusion Proteins) RN - 0 (glycoprotein G2, Hantavirus) SB - IM MH - Animals MH - Antibodies, Monoclonal/metabolism MH - Antibodies, Viral/metabolism MH - *Cell Fusion MH - Cell Membrane/chemistry MH - Chlorocebus aethiops MH - Cytoplasm/chemistry MH - Epitopes/immunology MH - Flow Cytometry MH - Giant Cells/cytology/virology MH - Glycoproteins/*physiology MH - Hantaan virus/pathogenicity/*physiology MH - Hydrogen-Ion Concentration MH - Microscopy, Fluorescence MH - Vero Cells MH - Viral Envelope Proteins/analysis/*metabolism/physiology MH - Viral Fusion Proteins/*metabolism PMC - PMC516380 EDAT- 2004/09/16 05:00 MHDA- 2004/10/22 09:00 PMCR- 2004/10/01 CRDT- 2004/09/16 05:00 PHST- 2004/09/16 05:00 [pubmed] PHST- 2004/10/22 09:00 [medline] PHST- 2004/09/16 05:00 [entrez] PHST- 2004/10/01 00:00 [pmc-release] AID - 78/19/10776 [pii] AID - 0192-04 [pii] AID - 10.1128/JVI.78.19.10776-10782.2004 [doi] PST - ppublish SO - J Virol. 2004 Oct;78(19):10776-82. doi: 10.1128/JVI.78.19.10776-10782.2004.