title: Toxoplasma gondii: redistribution of monoclonal antibodies on tachyzoites during host cell invasion.
abstract: Immunodetection of protein P30, a major surface antigen of Toxoplasma gondii tachyzoites, by a specific monoclonal antibody has demonstrated a homogenous distribution of this antigen on the surface of intra- and extracellular tachyzoites at all stages of their endodyogenic development. On living zoites, no redistribution of anti-P30 was obtained, contrasting with the capping obtained with antiserum to T. gondii. Upon invasion of a host cell, however, most of the coat of anti-P30 was shed from preincubated zoites at the level of the moving junction governing the entry of the parasite into the host cell.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000953:Antigens, Protozoan / Q000032:analysis* / Q000276:immunology; D000954:Antigens, Surface / Q000032:analysis* / Q000276:immunology; D002462:Cell Membrane / Q000469:parasitology / Q000648:ultrastructure; D005455:Fluorescent Antibody Technique; D006367:HeLa Cells; D006801:Humans; D007124:Immunoenzyme Techniques; D008565:Membrane Proteins / Q000032:analysis / Q000276:immunology; D008854:Microscopy, Electron; D015800:Protozoan Proteins; D014122:Toxoplasma / Q000276:immunology / Q000502:physiology* / Q000648:ultrastructure
chemical_list: D000911:Antibodies, Monoclonal; D000953:Antigens, Protozoan; D000954:Antigens, Surface; D008565:Membrane Proteins; D015800:Protozoan Proteins; C047168:SAG1 antigen, Toxoplasma