Abstract:
:Interleukin (IL)-5 is produced by variety of cell types and contributes to both lymphocyte development an eosinophil terminal differentiation in vitro. The coincidence of worm expulsion and eosinophilia in sheep infected with the gastrointestinal nematode Trichostrongylus colubriformis suggest that eosinophils may be involved as effector cells in host immunity against parasite infection. The role of IL-5 in this process was investigated by observing the distribution of IL-5 mRNA+ cells in the small intestine, mesenteric lymph nodes (MLN) and Peyer's patches (PP) by an in situ hybridization technique using a murine IL-5 riboprobe. IL-5 mRNA+ cells were distributed throughout the lamina propria (LP) of the small intestine from the tips of the villi to the muscularis mucosae and in the parafollicular areas of MLN and PP in both naive and immune sheep. The phenotypes of IL-5 mRNA+ cells was explored by simultaneous eosin and immunohistochemical staining using a monoclonal antibody recognizing the T19 marker, which identifies a major subset of gamma/delta TCR+ cells in sheep. In immune sheep, there was about a five-fold increase in the number of eosinophils and IL-5 cell mRNA+ cells in the LP, but there was no significant change in numbers of T19+ cells. Most of the IL-5 mRNA cells in the LP were eosinophils, but many of the T19+ cells also expressed IL-5 mRNA. In contrast, there were fewer eosinophils than T19+ cells in MLN of immune sheep and, compared to controls, a three-fold increase in T19+ cells and a five-fold increase in T19+/IL-5 mRNA+ double positive cells observed in immune sheep. In PP, there were very few eosinophils but substantial numbers of T19+ cells; however, no significant differences in numbers of eosinophils, T19+ or IL-5 mRNA+ cells were observed between control and immune sheep. These results indicate that in sheep, both eosinophils and gamma/delta T cells are capable of IL-5 expression and suggest that IL-5 is an important regulatory factor in autocrine and paracrine activation of effector cells involved in parasite immune expulsion.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Bao S,McClure SJ,Emery DL,Husband AJdoi
10.1002/eji.1830260308subject
Has Abstractpub_date
1996-03-01 00:00:00pages
552-6issue
3eissn
0014-2980issn
1521-4141journal_volume
26pub_type
杂志文章abstract::Mature T cells first appear in the thymus of the mouse a few days before birth, about 7-8 days after the thymus was colonized by stem cells. These mature cells are exported to the peripheral lymphoid organs beginning at about the time of birth, but because the number is very small at this stage, little is known about ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830220207
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journal_title:European journal of immunology
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更新日期:2002-03-01 00:00:00
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journal_title:European journal of immunology
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doi:10.1002/eji.1830190813
更新日期:1989-08-01 00:00:00
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journal_title:European journal of immunology
pub_type: 杂志文章
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journal_title:European journal of immunology
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journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830090208
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abstract::We previously demonstrated that cholera toxin (CT) is highly efficient as a combined carrier and adjuvant for dendritic cell (DC) vaccination, inducing strong Th1-dominated B cell and CD4(+) T cell responses. In this study we show that vaccination with DC pre-pulsed ex vivo with CT-conjugated OVA (OVA-CT) gives rise t...
journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
pub_type: 杂志文章
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更新日期:2008-06-01 00:00:00
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journal_title:European journal of immunology
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doi:10.1002/eji.200535616
更新日期:2006-02-01 00:00:00
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journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830250636
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journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830190621
更新日期:1989-06-01 00:00:00
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journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830230808
更新日期:1993-08-01 00:00:00
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journal_title:European journal of immunology
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更新日期:1990-08-01 00:00:00
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journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.201141445
更新日期:2011-10-01 00:00:00
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journal_title:European journal of immunology
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更新日期:2013-08-01 00:00:00
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journal_title:European journal of immunology
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更新日期:2005-12-01 00:00:00
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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更新日期:1997-08-01 00:00:00
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journal_title:European journal of immunology
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更新日期:1993-09-01 00:00:00
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journal_title:European journal of immunology
pub_type: 杂志文章
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更新日期:1997-07-01 00:00:00
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journal_title:European journal of immunology
pub_type: 杂志文章
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更新日期:2009-08-01 00:00:00
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journal_title:European journal of immunology
pub_type: 杂志文章
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更新日期:2003-01-01 00:00:00
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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更新日期:1992-04-01 00:00:00
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journal_title:European journal of immunology
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更新日期:1998-02-01 00:00:00