title: Certain characteristics of human lymphocyte migration inhibitory factors (LyMIF) and the effect of ampicillin on their appearance in unstimulated and PHA-stimulated cultures.
abstract: Supernatants of human blood mononuclear cells stimulated with PHA, contained factors inhibitory for in vitro migration of human lymphocytes and granulocytes. After ultrafiltration of supernatants through Amicon PM-10 some stimulatory activity appeared in the bottom fraction. Sephadex G-100 gel filtration chromatography of supernatants showed three zones of lymphocyte migration inhibitory activity: In the range of molecules of m.w. 35 000-90 000, heat-stable; Factors of m.w. from several to from ten to twenty thousand daltons, heat unstable; Low molecular weight substances, resistant to heat. The possible relationship of these factors to lymphotoxins, soluble lymphocyte T receptors for SRBC, lymphocyte chemotactic factor and prostaglandins is discussed. Ampicillin in doses of 10, 20 and 50 micrograms/ml potentiated both the development of lymphocyte migration inhibitory factors and the production of factors with an opposing effect (stimulating lymphocyte migration).
mesh_terms: D000667:Ampicillin / Q000008:administration & dosage / Q000494:pharmacology*; D002478:Cells, Cultured; D002634:Chemotaxis, Leukocyte / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D006098:Granulocytes / Q000378:metabolism; D006358:Hot Temperature; D006801:Humans; D066298:In Vitro Techniques; D007961:Leukocyte Migration-Inhibitory Factors / Q000502:physiology*; D008214:Lymphocytes / Q000378:metabolism; D008222:Lymphokines / Q000502:physiology*; D008970:Molecular Weight; D010835:Phytohemagglutinins / Q000494:pharmacology
chemical_list: D007961:Leukocyte Migration-Inhibitory Factors; D008222:Lymphokines; D010835:Phytohemagglutinins; D000667:Ampicillin