Eosinophils Regulate Type 2 Immune Responses Following Infection with the Nematode Trichinella spiralis
Journal of Bacteriology and Virology
; : 295-302, 2016.
Article
em Ko
| WPRIM
| ID: wpr-195570
Biblioteca responsável:
WPRO
ABSTRACT
Eosinophils are multifunctional leukocytes implicated in protection against helminth infections. Although eosinophils comprise between 1~5% of peripheral blood leukocytes, they primarily reside in the gastrointestinal tract under homeostatic conditions, and rapidly proliferate upon parasitic infection. Intestinal infection with Trichinella spiralis (T. spiralis) induces eosinophilia when the parasite enters the larval stages and larvae finally migrate to the skeletal muscle. Eosinophils are known to mediate parasite death through antibody-dependent cellular cytotoxicity. In this study, we aimed to address the functional significance of eosinophils in the intestinal phase of T. spiralis infection by analysis of immune responses in the Peyer's patch (PP) of infected BALB/c and eosinophil-ablated ΔdblGATA mice. Trafficking of eosinophils to the PP was significantly increased, with upregulation of interleukin-5 at 14 days post infection. Eosinophil deficiency led to a significant augmentation of serum immunoglobulin (Ig) M and IgG1 antibody levels. In accordance with this, IgG1+ B cells in the PP were substantially increased in ΔdblGATA mice compared to that in BALB/c mice. Transforming growth factor-β expression in the PP of infected ΔdblGATA mice was significantly decreased compared to that in BALB/c mice, whereas the number of T. spiralis larvae in the diaphragm was increased. Taken together, these findings indicate that eosinophils contribute to the regulation of Th2 immune responses, and protect the host from T. spiralis attempting to establish larvae in the skeletal muscle.
Palavras-chave
Texto completo:
1
Índice:
WPRIM
Assunto principal:
Parasitos
/
Trichinella
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Imunoglobulina G
/
Imunoglobulinas
/
Diafragma
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Linfócitos B
/
Regulação para Cima
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Interleucina-5
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Trichinella spiralis
/
Músculo Esquelético
Limite:
Animals
Idioma:
Ko
Revista:
Journal of Bacteriology and Virology
Ano de publicação:
2016
Tipo de documento:
Article