A role for TNF-alpha and mucosal T helper-1 cytokines in the pathogenesis of Crohn's disease
| Autor: | S E, Plevy, C J, Landers, J, Prehn, N M, Carramanzana, R L, Deem, D, Shealy, S R, Targan |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Tumor Necrosis Factor-alpha
CD2 Antigens Dose-Response Relationship Immunologic Antibodies Monoclonal Cell Count Th1 Cells Lymphocyte Activation Coculture Techniques Interferon-gamma Adjuvants Immunologic Crohn Disease T-Lymphocyte Subsets Leukocytes Mononuclear Cytokines Humans Intestinal Mucosa Infusions Intravenous Cells Cultured |
| Zdroj: | Journal of immunology (Baltimore, Md. : 1950). 159(12) |
| ISSN: | 0022-1767 |
| Popis: | Recent clinical studies of Crohn's disease patients demonstrated dramatic clinical responses following one i.v. infusion of a chimeric mAb to TNF-alpha (cA2). To assess the role of TNF-alpha in mucosal cytokine regulation, the effects of TNF-alpha on lamina propria mononuclear cell (LPMC) Th1 production were determined. Increased IFN-gamma production was demonstrated in anti-CD2-stimulated LPMC cultured in TNF-alpha. To determine the effects of cA2 on cytokine production, TNF-alpha- and IFN-gamma-producing cells were quantitated in LPMC from five Crohn's disease patients treated with cA2. In all four patients who demonstrated clinical and endoscopic improvement, decreased numbers of LPMC producing IFN-gamma and TNF-alpha following CD2/CD28 activation paralleled improvement in disease activity over 8 wk. In one patient who did not improve, increased numbers of TNF-alpha- and IFN-gamma-secreting LPMC were observed. In three of four responding patients, CD2/CD28-activated PBMC demonstrated increased IFN-gamma production over 8 wk. These observations suggest that TNF-alpha may be a cofactor for mucosal Th1 responses, and improvement in clinical parameters and intestinal inflammation induced by cA2 in Crohn's disease may be mediated by down-regulation of mucosal Th1 cytokines. |
| Databáze: | OpenAIRE |
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