title: Differential modulatory effect of IL-5 on MHC class II expression by macrophages and B cells.
abstract: The present study examines the effect of interleukin 5 on the expression of class II major histocompatibility complex (MHC) in macrophages and B cells. Treatment of splenic adherent cells, a population that contains mostly macrophages and dendritic cells, with 100 U/ml of recombinant interleukin 5 resulted in a decrease of 10 to 30% in cell surface MHC class II expression by macrophages. The treatment had no effect on class I MHC expression, or on the mRNA synthesis as evaluated by tritiated-uridine incorporation. The same treatment of B cells resulted in the delineation of two groups with regard to class II MHC expression in a previously more homogeneous population. One group had an increase in surface Ia expression and the other had a decrease in the expression of this molecule. These results suggest that interleukin 5 has a role in MHC class II regulation.
authors.affiliation: Department of Pediatrics, Stanford University Medical Center, CA 94305.
authors.forename: L V
authors.initials: LV
authors.lastname: Rizzo
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000187:drug effects* / Q000276:immunology; D002469:Cell Separation; D002478:Cells, Cultured / Q000187:drug effects / Q000276:immunology; D005434:Flow Cytometry; D000949:Histocompatibility Antigens Class II / Q000187:drug effects* / Q000276:immunology; D015848:Interleukin-5 / Q000494:pharmacology*; D008264:Macrophages / Q000187:drug effects* / Q000276:immunology; D051379:Mice; D008811:Mice, Inbred DBA; D011994:Recombinant Proteins / Q000494:pharmacology; D013154:Spleen / Q000166:cytology / Q000187:drug effects / Q000276:immunology
chemical_list: D000949:Histocompatibility Antigens Class II; D015848:Interleukin-5; D011994:Recombinant Proteins