Effect of infection by bovine viral diarrhea virus (BVDV) in vitro on interleukin-1 activity of bovine monocytes.
The effect of bovine viral diarrhea virus (BVDV) infection in vitro on the interleukin-1 (IL-1) activity of bovine monocytes was studied. Supernatants from BVDV-infected monocytes suppressed IL-1-stimulated proliferation of mouse thymocytes and masked lipopolysaccharide-stimulated IL-1 activity of bovine monocytes in the mouse comitogen thymocyte assay. Suppression of mouse thymocyte proliferation was restored by the addition of IL-1. IL-1 inhibitory activity was induced both by the prototype variants BVDV/NADL cytopathic and BVDV/NY-1 noncytopathic and by BVDV variants isolated from persistently infected cattle. Suppressed IL-1 activity was also found in supernatants from monocytes from persistently infected cattle following infection with BVDV in vitro. No differences in levels of IL-1 mRNA synthesis were detected between BVDV-infected and uninfected monocytes by RNA-cDNA hybridization. These results suggest that infection of bovine monocytes with BVDV results in the production and/or activation of a soluble inhibitor of IL-1 activity.
Jensen
J
J
Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison 53706.
Schultz
R D
RD
D000818:Animals; D001912:Bovine Virus Diarrhea-Mucosal Disease / Q000503:physiopathology*; D002417:Cattle; D003470:Culture Media; D007375:Interleukin-1 / Q000096:biosynthesis* / Q000235:genetics; D008070:Lipopolysaccharides; D008213:Lymphocyte Activation; D051379:Mice; D009000:Monocytes / Q000276:immunology*; D009693:Nucleic Acid Hybridization; D012333:RNA, Messenger / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology
D003470:Culture Media; D007375:Interleukin-1; D008070:Lipopolysaccharides; D012333:RNA, Messenger