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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
B cells that produce immunoglobulin e mediate colitis in BALB/c mice
Gastroenterology, Volume 142, No. 1, Year 2012
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Description
Induction of colitis in mice by administration of oxazolone is mediated by T-helper (Th) 2 cells and has features of human ulcerative colitis. We investigated whether activation of interleukin (IL)-4Rα on T and B cells determines their effector functions and mediates oxazolone-induced colitis. We studied induction of colitis with oxazolone in wild-type mice and those with CD4+ T cells that did not express IL-4Rα (Lck creIL-4Rα-/lox). We also generated mice with B cells that did not express IL-4Rα (mb1creIL-4Rα -/lox) and studied induction of colitis. LckcreIL- 4Rα-/lox mice did not develop colitis in response to oxazolone, and their levels of IL-4, IL-13, and immunoglobulin (Ig) E were reduced. Adoptive transfer of nave, wild-type CD4+ Th cells depleted of natural killer T cells to LckcreIL-4Rα-/lox mice restored their susceptibility to colitis. In contrast, LckcreIL- 4Rα-/lox mice maintained their protection against colitis when IL-13deficient CD4+ T cells were transferred. These findings indicate that development of colitis involves not only natural killer T-cell functions, but also requires IL-13 production by CD4+ T helper cells. Mb1 creIL-4Rα-/lox mice, which cannot produce IgE, were also protected against oxazolone-induced colitis. Blocking IgE binding significantly reduced mast cell numbers in colons and protected wild-type BALB/c mice from the onset of colitis. IL-4 appears to induce CD4+ Th2 cells to produce IL-13 and B cells to produce IgE, which together mediate oxazolone-induced colitis in mice. © 2012 AGA Institute.
Authors & Co-Authors
Hoving, Jennifer Claire
South Africa, Cape Town
University of Cape Town
Kirstein, Frank
South Africa, Cape Town
University of Cape Town
Nieuwenhuizen, Natalie Eva
South Africa, Cape Town
University of Cape Town
Fick, Lizette C.E.
South Africa, Cape Town
University of Cape Town
Hobeika, Elias
Germany, Freiburg Im Breisgau
Universität Freiburg
Germany, Freiburg Im Breisgau
Max Planck Institute of Immunobiology and Epigenetics
Reth, Michael
Germany, Freiburg Im Breisgau
Universität Freiburg
Germany, Freiburg Im Breisgau
Max Planck Institute of Immunobiology and Epigenetics
Brombacher, Frank
South Africa, Cape Town
University of Cape Town
Italy, Trieste
International Centre for Genetic Engineering and Biotechnology
Statistics
Citations: 47
Authors: 7
Affiliations: 4
Identifiers
Doi:
10.1053/j.gastro.2011.09.044
ISSN:
00165085
e-ISSN:
15280012