title: Demonstration of platelet electrophoretic mobility slowing factor (PSF) in supernatants of human lymphocyte cultures stimulated by phytohaemagglutinin (PHA).
abstract: It has been demonstrated that human peripheral lymphocytes, stimulated with PHA, form or release a factor that slows platelet electrophoretic mobility (PEM). The factor is chromatographed on Ultrogel AC a 44, has a molecular weight of approximately 45,000, is stable on heating at 56 degrees C for 30 min, but is inactivated by heating at 80 degrees C for 10 min. In addition, it is distinct from leukocyte inhibiting factor, which elutes in the range of BSA (mol. wt. 69,000). The authors conclude, in accordance with previous investigations, that cellular immunity is involved in thrombotic processes.
mesh_terms: D001792:Blood Platelets / Q000276:immunology*; D002464:Cell Migration Inhibition; D002478:Cells, Cultured; D005591:Chemical Fractionation; D004586:Electrophoresis; D006358:Hot Temperature; D006801:Humans; D037102:Lectins / Q000494:pharmacology*; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology*; D008222:Lymphokines / Q000032:analysis
chemical_list: D037102:Lectins; D008222:Lymphokines