Neither interleukin-4 receptor alpha expression on CD4+ T cells, or macrophages and neutrophils is required for protective immunity to Trichinella spiralis.
Immunology
; 128(1 Suppl): e385-94, 2009 Sep.
Article
en En
| MEDLINE
| ID: mdl-19191917
ABSTRACT
The T helper type 2 (Th2) mediated expulsion of the gastrointestinal nematode Trichinella spiralis requires interleukin-4 receptor alpha (IL-4Ralpha) expression on both bone-marrow-derived and non-bone-marrow-derived cells. To more definitively investigate the role of IL-4/IL-13 responsiveness in the development of protective immunity to T. spiralis, cell-specific IL-4Ralpha signalling on CD4(+) T cells (Lck(cre) IL-4Ralpha(-/flox)) and macrophages/neutrophils (LysM(cre) IL-4Ralpha(-/flox)) was analysed on the BALB/c background. Infection of wild-type and control IL-4Ralpha(-/flox) mice induced a Th2-type immune response with elevated IL-4 cytokine production, parasite-specific immunoglobulin G1 (IgG1), total IgE, intestinal mastocytosis and enteropathy. In contrast, global IL-4Ralpha-deficient BALB/c mice showed reduced worm expulsion, antibody production, intestinal mastocytosis and gut pathology. BALB/c mice generated with cell-specific deletion of IL-4Ralpha on CD4(+) T lymphocytes or macrophages/neutrophils, controlled gastrointestinal helminth infection by eliciting a protective immune response comparable to that observed with wild-type and IL-4Ralpha(-/flox) controls. Together, this shows that the development of host protective Th2 responses accompanied by parasite loss is independent of IL-4Ralpha expression on CD4(+) T cells and macrophages/neutrophils.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Triquinelosis
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Linfocitos T CD4-Positivos
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Trichinella spiralis
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Receptores de Superficie Celular
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Macrófagos
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Neutrófilos
Límite:
Animals
Idioma:
En
Revista:
Immunology
Año:
2009
Tipo del documento:
Article
País de afiliación:
Reino Unido