title: [Immunomodulation by TYB-2285 of Dermatophagoides farinae (Df) antigen-induced IFN-gamma and IL-4 production in lymphocytes from children with bronchial asthma].
abstract: Effect of TYB-2285 and its metabolites on immune responses by peripheral blood mononuclear cells (PBMC) from children with bronchial asthma was investigated. TYB-2285 and its metabolites have immunosuppressive activity for the proliferation by Df-stimulated patients' lymphocytes. Concanavalin A (Con A)-activated peripheral blood mononuclear cells (PBMC) from the patients were not affected by the same treatment. The results indicate that TYB-2285 and its metabolites are capable of suppressing antigen-induced 3H-thymidine (3H-TdR) uptake but not the response induced by Con A. Interferon-gamma (IFN-gamma) production by Df-stimulated PBMC from patients with active asthma, which was lower than that of normal lymphocytes, were reversed beyond the levels of that in normal subjects. Thus reduced production of IFN-gamma by Df-stimulated patients' lymphocytes was increased by TYB-2285 and its metabolites in a dose-dependent manner. This phenomenon was not observed in lymphocytes from normal subjects. Furthermore, TYB-2285 inhibited IL-4 production induced by Df antigen in asthmatic patients' lymphocytes. Taken, together, TYB-2285 could work as a weak immunosuppressant to modify lymphocytes' responses to allergen in patients with bronchial asthma. These data underscore the potential benefit for the patients with bronchial asthma.
authors.affiliation: Department of Pediatrics, Saitama Medical School.
authors.forename: K
authors.initials: K
authors.lastname: Kou
authors.forename: M
authors.initials: M
authors.lastname: Hayashi
authors.forename: T
authors.initials: T
authors.lastname: Nakajima
authors.forename: I
authors.initials: I
authors.lastname: Yoshizawa
authors.forename: Y
authors.initials: Y
authors.lastname: Kawano
authors.forename: Y
authors.initials: Y
authors.lastname: Shikishima
authors.forename: T
authors.initials: T
authors.lastname: Noma
mesh_terms: D000293:Adolescent; D000818:Animals; D018926:Anti-Allergic Agents / Q000494:pharmacology*; D001249:Asthma / Q000276:immunology*; D002478:Cells, Cultured; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007371:Interferon-gamma / Q000096:biosynthesis*; D015847:Interleukin-4 / Q000096:biosynthesis*; D008213:Lymphocyte Activation / Q000187:drug effects*; D008214:Lymphocytes / Q000276:immunology* / Q000378:metabolism; D008925:Mites / Q000276:immunology*; D009570:Nitriles / Q000494:pharmacology*
chemical_list: D018926:Anti-Allergic Agents; D009570:Nitriles; C081050:3,5-bis(acetoxyacetylamino)-4-chlorobenzonitrile; D015847:Interleukin-4; D007371:Interferon-gamma