title: Induction of heat-shock proteins and phagocytic function of chicken macrophage following in vitro heat exposure.
abstract: The protein profiles and phagocytic ability of Sephadex-elicited chicken peritoneal macrophages were examined following heat-shock exposure. Macrophage cultures were exposed to various temperatures, time exposures and recovery periods. Densitometric analysis of SDS-PAGE autoradiographs revealed that heat-induced macrophages synthesized three major (23, 70 and 90 kD) heat-shock proteins (HSPs). The optimal temperature and time for induction of these HSPs was 45-46 degrees C for 1 h, with a variable recovery period for each HSP. Macrophages exposed to 45 degrees C for 30 and 60 min were significantly depressed in phagocytosis of uncoated sheep erythrocytes (SE) under 45 degrees C incubation conditions. However, phagocytosis of antibody-coated SE was not affected when compared to 41 degrees C control cultures. Macrophages allowed to recover at 41 degrees C following heat-shock exhibited no alterations in their phagocytic ability for either antibody-coated or uncoated SE. This study suggests that heat shock induces three major HSPs in chicken peritoneal macrophages in addition to maintaining their Fc-mediated phagocytic function while significantly depressing their nonspecific phagocytosis.
authors.affiliation: Department of Poultry Science, North Carolina State University, Raleigh 27695-7608.
authors.forename: L
authors.initials: L
authors.lastname: Miller
authors.forename: M A
authors.initials: MA
authors.lastname: Qureshi
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002478:Cells, Cultured; D002645:Chickens / Q000276:immunology*; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D006360:Heat-Shock Proteins / Q000378:metabolism*; D006358:Hot Temperature; D008264:Macrophages / Q000276:immunology*; D010587:Phagocytosis / Q000276:immunology*
chemical_list: D006360:Heat-Shock Proteins