title: Characteristics of streptolysin S hemolysis.
abstract: The characteristics of hemolysis produced by streptolysin S (SLS) were investigated in rabbit erythrocytes. Treatment of erythrocytes with SLS at various temperatures prior to incubation at 37 C revealed an initial temperature-dependent interaction between toxin and the cells. No subsequent hemolysis occurred when erythrocytes were exposed to SLS at 0 to 10 C; exposure to toxin at temperatures above 10 C gradually increased the amount of hemolysis that occurred at 37 C. Very little binding of toxin to erythrocytes or their ghosts, as detected by a decrease of hemolytic activity from toxin preparations, could be demonstrated at any temperature. The release of hemoglobin after the temperature-dependent process occur at virtually the same rate at 0, 22, or 37 C. The loss of intracellular rubidium-86 (Rb) and hemoglobin from SLS-treated erythrocytes was studied. Rb+ release significantly preceded the escape of hemoglobin, suggesting that colloid-osmotic processes play a role in SLS hemolysis.
mesh_terms: D000327:Adsorption; D000818:Animals; D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D002478:Cells, Cultured; D004912:Erythrocytes / Q000276:immunology* / Q000378:metabolism; D006454:Hemoglobins / Q000378:metabolism; D006461:Hemolysis; D009995:Osmosis; D011817:Rabbits; D011868:Radioisotopes; D012413:Rubidium / Q000378:metabolism; D013301:Streptolysins / Q000494:pharmacology*; D013696:Temperature
chemical_list: D006454:Hemoglobins; D011868:Radioisotopes; D013301:Streptolysins; D012413:Rubidium