title: Modulation of mite antigen-induced immune responses by lecithin-bound iodine in peripheral blood lymphocytes from patients with bronchial asthma.
abstract: 1. Dermatophagoides farinae (Df) mite antigen induced IgE synthesis associated with an imbalance of cytokine production in mite-sensitive patients with bronchial asthma; increased production of interleukin 4 (IL-4), and decreased production of interferon-gamma (IFN-gamma) was specifically induced in these patients' lymphocytes. 2. Lecithin-bound iodine (LBI), with which children with bronchial asthma have been successfully treated in the range of 0.5 to 5 microM, concentrations comparable to LBI blood levels in medicated individuals, modified mite antigen-induced immune responses, thereby decreasing abnormal lymphocyte functions. 3. In Df antigen-driven immune responses, inhibition of IgE generation accompanied by suppression of IL-4 and the recovery of IFN-gamma production was successful when LBI was used in vitro. 4. LBI also acted on normal PBMCs by downregulating the IL-4-induced IgE synthesis, phytohaemagglutin (PHA)- and phorbol myristate acetate (PMA) plus calcium ionophore (CaI)-induced IL-4 secretion, and by upregulating purified protein derivatives (PPD)-induced IFN-gamma production. Therefore, LBI was capable of inhibiting the IgE and IL-4 responses and of enhancing IFN-gamma production both from allergen-stimulated atopic cells and from non-atopic cells appropriately stimulated. 5. The expression of human histocompatibility leukocyte antigen (HLA), class II antigens and intercellular adhesion molecule 1 (ICAM-1) on monocytes, crucial molecules for T cell-monocyte interactions, was not altered by LBI. 6. LBI probably acts as an immunomodulator to ameliorate mite antigen-induced abnormal cell-mediated immune responses in patients with bronchial asthma caused by Df antigen thereby leading to improvement of their clinical status.
authors.affiliation: Department of Pediatrics, Saitama Medical School, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kawano
authors.forename: T
authors.initials: T
authors.lastname: Noma
mesh_terms: D000818:Animals; D000941:Antigens / Q000276:immunology; D039741:Antigens, Dermatophagoides; D001249:Asthma / Q000097:blood / Q000276:immunology*; D006023:Glycoproteins / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D006801:Humans; D007073:Immunoglobulin E / Q000096:biosynthesis; D018799:Intercellular Adhesion Molecule-1 / Q000276:immunology; D007371:Interferon-gamma / Q000096:biosynthesis; D015847:Interleukin-4 / Q000378:metabolism; D007455:Iodine; D008214:Lymphocytes / Q000276:immunology*; D008925:Mites / Q000276:immunology*; D010713:Phosphatidylcholines / Q000494:pharmacology*
chemical_list: D000941:Antigens; D039741:Antigens, Dermatophagoides; D006023:Glycoproteins; D000949:Histocompatibility Antigens Class II; D010713:Phosphatidylcholines; D018799:Intercellular Adhesion Molecule-1; D015847:Interleukin-4; C036559:lecithin-bound iodine; D007073:Immunoglobulin E; D007371:Interferon-gamma; D007455:Iodine