Fusion of erythrocytes by Sendai virus studied by immuno-freeze-etching.
Extensive fusion of human erythrocytes agglutinated by Sendai virus was observed after 30 s of incubation at 37 C. Electron microscopy of thin sections failed to reveal the presence of virions, viral fragments, or discrete viral antigens reactive with ferritin-labeled antibody at the sites of fusion. Immuno-freezeetching of membrane surfaces demonstrated the dispersal of viral envelope antigens from what appeared to be original sites of viral attachment. Virus-induced clustering of membrane glycoproteins was interpreted as resulting from interaction of viral antigens with membrane receptor proteins and forming the structural basis for fusion of membranes with one another.
D000042:Absorption; D000371:Agglutination; D000818:Animals; D000914:Antibodies, Viral; D000956:Antigens, Viral / Q000302:isolation & purification; D002459:Cell Fusion; D002462:Cell Membrane / Q000276:immunology; D004912:Erythrocytes / Q000166:cytology* / Q000276:immunology; D005293:Ferritins; D005613:Freeze Etching; D006023:Glycoproteins; D006801:Humans; D007106:Immune Sera; D008722:Methods; D008854:Microscopy, Electron; D008961:Models, Structural; D010222:Parainfluenza Virus 1, Human / Q000276:immunology*; D011817:Rabbits / Q000276:immunology; D013696:Temperature
D000914:Antibodies, Viral; D000956:Antigens, Viral; D006023:Glycoproteins; D007106:Immune Sera; D005293:Ferritins