title: Stimulating effect of MDP and its adjuvant-active analogues on guinea pig fibroblasts for the production of thymocyte-activating factor.
abstract: Synthetic muramyl dipeptide (MDP) could stimulate skin fibroblasts of the guinea pig to produce thymocyte-activating factor, which augments the proliferative response of thymocytes to phytohemagglutinin (PHA). Adjuvant-active analogues of MDP also stimulated fibroblasts to produce the factor, whereas adjuvant-inactive analogues failed to do so. Thus a marked parallelism was found between adjuvant activity of these compounds and the stimulating effect on fibroblasts. Thymocyte-activating factor derived from MDP-stimulated fibroblasts was found in the fraction of mol wt 30,000-60,000 by gel filtration on a Sephacryl S-200 column. Furthermore, this factor did not exhibit T cell growth factor activity.
mesh_terms: D000119:Acetylmuramyl-Alanyl-Isoglutamine / Q000031:analogs & derivatives / Q000494:pharmacology*; D000818:Animals; D001688:Biological Products / Q000097:blood* / Q000494:pharmacology; D002478:Cells, Cultured; D016207:Cytokines; D005347:Fibroblasts / Q000187:drug effects / Q000378:metabolism*; D006168:Guinea Pigs; D008213:Lymphocyte Activation / Q000187:drug effects; D010835:Phytohemagglutinins / Q000494:pharmacology; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D001688:Biological Products; D016207:Cytokines; D010835:Phytohemagglutinins; C051922:thymocyte-activating factor, fibroblasts; D000119:Acetylmuramyl-Alanyl-Isoglutamine