title: Antibodies to interleukin 12 abrogate established experimental colitis in mice.
abstract: In this study, we describe a novel murine model of chronic intestinal inflammation induced by the hapten reagent 2,4,6-trinitrobenzene sulfonic acid (TNBS). Rectal application of low doses of TNBS in BALB/c and SJL/J mice resulted in a chronic transmural colitis with severe diarrhea, weight loss, and rectal prolapse, an illness that mimics some characteristics of Crohn's disease in humans. The colon of TNBS-treated mice on day 7 was marked by infiltration of CD4+ T cells; furthermore, in situ polymerase chain reaction studies revealed high levels of interferon (IFN)-gamma mRNA in diseased colons. Isolated lamina propria (LP) CD4+ T cells from TNBS-treated mice stimulated with anti-CD3 and anti-CD28 antibodies exhibited a Th1 pattern of cytokine secretion: a 20-50-fold increase in IL-2 and IFN-gamma levels and a 5-fold decrease in IL-4 levels as compared with those of stimulated LP CD4+ T cells from control BALB/c mice. Administration of monoclonal anti-IL-12 antibodies to the TNBS-treated mice both early (at 5 d) and late (at 20 d) after induction of colitis led to a striking improvement in both the clinical and histopathological aspects of the disease and frequently abrogated the established colitis completely. Furthermore, LP CD4+ T cells isolated from anti-IL-12-treated mice failed to secrete IFN-gamma upon in vitro stimulation. In summary, the data demonstrate the pivotal role of IL-12 and IFN-gamma in a TNBS-induced murine model of chronic intestinal inflammation. Furthermore, they suggest the potential utility of anti-IL-12 antibodies in patients with Crohn's disease.
authors.affiliation: Mucosal Immunity Section, National Institutes of Health/National Institute of Allergy and Infectious Diseases/LCI, Bethesda, Maryland 20892-1890, USA.
authors.forename: M F
authors.initials: MF
authors.lastname: Neurath
authors.forename: I
authors.initials: I
authors.lastname: Fuss
authors.forename: B L
authors.initials: BL
authors.lastname: Kelsall
authors.forename: E
authors.initials: E
authors.lastname: Stüber
authors.forename: W
authors.initials: W
authors.lastname: Strober
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology / Q000627:therapeutic use*; D001483:Base Sequence; D018791:CD4 Lymphocyte Count; D003092:Colitis / Q000139:chemically induced / Q000276:immunology*; D003106:Colon / Q000276:immunology / Q000473:pathology; D003424:Crohn Disease; D004195:Disease Models, Animal; D007371:Interferon-gamma / Q000502:physiology; D018664:Interleukin-12 / Q000037:antagonists & inhibitors* / Q000276:immunology / Q000502:physiology; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D008815:Mice, Inbred Strains; D008969:Molecular Sequence Data; D013154:Spleen / Q000276:immunology / Q000473:pathology; D014302:Trinitrobenzenesulfonic Acid / Q000633:toxicity
chemical_list: D000911:Antibodies, Monoclonal; D018664:Interleukin-12; D007371:Interferon-gamma; D014302:Trinitrobenzenesulfonic Acid