title: Surface membrane redistribution and stabilization of concanavalin A-specific receptors following Yaba tumor poxvirus infection.
abstract: Monkey kidney cells productively infected with Yaba tumor poxvirus clearly exhibit plasma membrane alterations when treated with both fluorescein-labeled and unlabeled concanavalin A. The convanavalin A-mediated cytoagglutination reaction for Yaba-infected Jinet and CV-1 cells increased linearly from 12 to 16 h post-infection, reaching a maximum by 24-28 h. Treatment of either Yaba-infected CVC-1 or Jinet cells with methyl-D-glucopyranoside before or after addition of concanavalin A completely blocked or reversed the cytoaglutination response. Trypsin treatment of uninfected CV-1 or Jinet cells enhanced concanavalin A-mediated cytoagglutination properties. Conversely, trypsin treatment of Yaba-infected Jinet cells resulted in a reduced cytoagglutination response. Increasing temperature and lectin concentration enhance concanavalin A-mediated cytoagglutination for uninfected, trypsin-treated and Yaba-infected CV-1 cells. Cytosine arabinoside has little or no effect on the Yaba-induced cell cytoagglutination reaction while cycloheximide blocks the cytoagglutinatin response if added prior to 12 h post-infection. Fluorescein-labeled concanavalin A binding studies have revealed that at 4 degrees C, Yaba-infected CV-1 cells display a predominantly 'patchy' pattern of topological fluorescence, while trypsin-treated and uninfected CV-1 cells at 4 degrees C display a uniform pattern of fluorescence binding. Patchy fluorescence, indicative of concanavalin A-suspeptible, receptor-site clustering on the surface membrane, was reduced 50% if Yaba-infected CV-1 cells were treated with glutaraldehyde (2.5%) before addition of fluorescein-labeled concanavalin A at 4 degrees C. Similar pre-fixatin of trypsin-treated CV-1 cells resulted in uniform, fluorescent labelling patterns at all assay temperatures.
mesh_terms: D000372:Agglutination Tests; D000818:Animals; D002460:Cell Line; D002472:Cell Transformation, Viral / Q000187:drug effects; D003208:Concanavalin A; D003513:Cycloheximide / Q000494:pharmacology; D003561:Cytarabine / Q000494:pharmacology; D000882:Haplorhini; D007668:Kidney; D011952:Receptors, Concanavalin A / Q000378:metabolism*; D014357:Trypsin / Q000494:pharmacology; D014999:Yaba monkey tumor virus / Q000187:drug effects / Q000276:immunology*
chemical_list: D011952:Receptors, Concanavalin A; D003561:Cytarabine; D003208:Concanavalin A; D003513:Cycloheximide; D014357:Trypsin