Intensity of intestinal infection with multiple worm species is related to regulatory cytokine output and immune hyporesponsiveness

Research output: Contribution to journalArticle

  • External authors:
  • Joseph D. Turner
  • Joseph A. Jackson
  • Helen Faulkner
  • Jerzy Behnke
  • Joseph Kamgno
  • Michel Boussinesq
  • Janette E. Bradley

Abstract

Increasing immunological dysfunction (atopy and autoimmunity) in western society may be linked to changes in undetermined environmental agents. We hypothesize that increased exposure to multiple gut worm species promotes stronger immunological regulation. We report here that African children constitutively secrete more immunoregulatory cytokines (interleukin [IL]-10 and transforming growth factor [TGF]-β1) under conditions of hyperendemic exposure to the intestinal nematodes Ascaris lumbricoides and Trichuris trichiura, compared with conditions of mesoendemic exposure. Under conditions of hyperendemic exposure, estimators of combined intestinal nematode infection level relate positively to combined constitutive IL-10 and TGF-β1 production and negatively to total immune reactivity (determined as IL-4, interferon-γ, and cellular proliferative responses to Ascaris or Trichuris helminth antigens, Streptococcus pneumoniae bacterial antigen, or the mitogen phytohemaglutinin). Total immune reactivity and anti-inflammatory cytokine production relate inversely. Our data suggest that gut nematodes are important mediators of immunoregulation. © 2008 by the Infectious Diseases Society of America. All rights reserved.

Bibliographical metadata

Original languageEnglish
Pages (from-to)1204-1212
Number of pages8
JournalJournal of INfectious Diseases
Volume197
Issue number8
DOIs
Publication statusPublished - 15 Apr 2008