title: Mangifera indica L. extract (Vimang) and mangiferin modulate mouse humoral immune responses.
abstract: The present study investigated the effects of orally administered Vimang (an aqueous extract of Mangifera indica) and mangiferin (the major polyphenol present in Vimang) on mouse antibody responses induced by inoculation with spores of microsporidian parasites. Inoculation induced specific antibody production with an exponential timecourse, peaking after about one month. Vimang significantly inhibited this antibody production from about three weeks post-inoculation, and most markedly by four weeks post-inoculation; by contrast, mangiferin had no significant effect. Determination of Ig isotypes showed that the IgM to IgG switch began about four weeks post-inoculation, with IgG2a predominating. Vimang significantly inhibited IgG production, but had no effect on IgM. Mangiferin did no affect either IgM or IgG2a, but significantly enhanced production of IgG1 and IgG2b. Neither Vimang nor mangiferin enhanced specific antibody secretion by splenic plasma cells from mice inoculated with microsporidian spores, whether administered in vivo before serum extraction or in vitro to the culture medium. Inoculation with spores induced splenomegaly, which was significantly reduced by Vimang and significantly enhanced by mangiferin. These results suggest that components of Mangifera indica extracts may be of potential value for modulating the humoral response in different immunopathological disorders.
authors.affiliation: Laboratorio de Farmacología, Centro de Química Farmacéutica, Ciudad de la Habana (Havana City), Cuba.
authors.forename: D
authors.initials: D
authors.lastname: García
authors.forename: J
authors.initials: J
authors.lastname: Leiro
authors.forename: R
authors.initials: R
authors.lastname: Delgado
authors.forename: M L
authors.initials: ML
authors.lastname: Sanmartín
authors.forename: F M
authors.initials: FM
authors.lastname: Ubeira
mesh_terms: D000276:Adjuvants, Immunologic / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D000818:Animals; D000917:Antibody Formation / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004797:Enzyme-Linked Immunosorbent Assay; D007441:Intubation, Gastrointestinal; D031022:Mangifera; D051379:Mice; D008807:Mice, Inbred BALB C; D016814:Microsporidia / Q000502:physiology; D008517:Phytotherapy; D024301:Plant Bark; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D013154:Spleen / Q000187:drug effects; D013171:Spores, Bacterial / Q000276:immunology; D044004:Xanthones / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D000276:Adjuvants, Immunologic; D010936:Plant Extracts; D044004:Xanthones; C013592:mangiferin