title: Differential requirement for CD28/CTLA-4-CD80/CD86 interactions in drug-induced type 1 and type 2 immune responses to trinitrophenyl-ovalbumin.
abstract: The use of mAbs to abrogate costimulatory interactions has attracted much attention with regard to prevention and modulation of adverse (auto)immune-like reactions. However, the role of costimulatory molecules and possible therapeutic use of Ab-treatment in drug-induced immunostimulation is poorly elucidated. In the present studies, we show that CD28/CTLA-4-CD80/CD86 costimulatory interactions differently regulate drug-induced type 1 and type 2 responses to an identical bystander Ag, TNP-OVA, in BALB/c mice using the reporter Ag popliteal lymph node assay. The antirheumatic drug D-Penicillamine, which may induce lupus-like side-effects, stimulated type 2 responses against TNP-OVA, characterized by the production of IL-4 and TNP-specific IgG1 and IgE. These responses were abrogated in CD80/CD86-deficient mice and in wild-type mice that were treated with anti-CD80 and anti-CD86, or CTLA-4-Ig. Anti-CTLA-4 intensively enhanced the D-Penicillamine-induced effects. In contrast, the type 1 response (IFN-gamma, TNF-alpha, IgG2a) to TNP-OVA induced by the diabetogen streptozotocin still developed in the absence of CD80/CD86 costimulatory signaling. In addition, it was demonstrated that coadministration of anti-CD80 and anti-CD86 mAbs slightly enhanced streptozotocin-induced type 1 responses, whereas the CTLA-4-Ig fusion protein completely abrogated this response. In conclusion, different drugs may stimulate distinct types of immune responses against an identical bystander Ag, which are completely dependent on (type 2) or independent of (type 1) the CD28/CTLA-4-CD80/CD86 pathway. Importantly, the effects of treatment with anti-CD80/CD86 mAbs and CTLA-4-Ig may be considerably different in responses induced by distinct drugs.
authors.affiliation: Institute for Risk Assessment Sciences, Immunotoxicology, Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands. S.Nierkens@ncmls.ru.nl
authors.forename: Stefan
authors.initials: S
authors.lastname: Nierkens
authors.forename: Marloes
authors.initials: M
authors.lastname: Aalbers
authors.forename: Marianne
authors.initials: M
authors.lastname: Bol
authors.forename: Rob
authors.initials: R
authors.lastname: Bleumink
authors.forename: Peter
authors.initials: P
authors.lastname: van Kooten
authors.forename: Louis
authors.initials: L
authors.lastname: Boon
authors.forename: Raymond
authors.initials: R
authors.lastname: Pieters
mesh_terms: D000818:Animals; D000906:Antibodies / Q000494:pharmacology; D015703:Antigens, CD / Q000276:immunology / Q000378:metabolism*; D000943:Antigens, Differentiation / Q000276:immunology / Q000378:metabolism; D018122:B7-1 Antigen / Q000276:immunology / Q000378:metabolism; D024201:Bystander Effect / Q000276:immunology*; D018106:CD28 Antigens / Q000276:immunology / Q000378:metabolism; D060908:CTLA-4 Antigen; D004342:Drug Hypersensitivity / Q000209:etiology / Q000276:immunology*; D005260:Female; D007109:Immunity; D051379:Mice; D008807:Mice, Inbred BALB C; D018345:Mice, Knockout; D010047:Ovalbumin / Q000276:immunology*; D010396:Penicillamine / Q000276:immunology; D015398:Signal Transduction / Q000276:immunology; D013311:Streptozocin / Q000276:immunology; D018417:Th1 Cells / Q000276:immunology*; D018418:Th2 Cells / Q000276:immunology*
chemical_list: D000906:Antibodies; D015703:Antigens, CD; D000943:Antigens, Differentiation; D018122:B7-1 Antigen; D018106:CD28 Antigens; D060908:CTLA-4 Antigen; C556707:Ctla4 protein, mouse; C038600:trinitrophenyl-ovalbumin; D013311:Streptozocin; D010047:Ovalbumin; D010396:Penicillamine