Document Detail

Immunological paradigms and the pathogenesis of ovine chlamydial abortion.
MedLine Citation:
PMID:  20712809     Owner:  NLM     Status:  In-Process    
Successful mammalian pregnancy involves complex immunological interactions between the mother and foetus that are not yet fully understood. A number of immunological paradigms have been established to explain the failure of the maternal immune system to reject the semi-allogeneic foetus, mainly based on studies in mice and humans. However, as placental structure, gestation periods and number of concepti per pregnancy can vary greatly between mammals, it is not always clear how applicable these immunological paradigms are to reproduction in other species. Here, we discuss the predictions of three important immunological paradigms in relation to the pathogenesis of ovine enzootic abortion (OEA), a common cause of infectious abortion in sheep and other ruminants. OEA is caused by the intracellular Gram-negative bacterium Chlamydophila abortus that exhibits a tropism for placental trophoblast. The paradigms of particular relevance to the pathogenesis of OEA are as follows: (i) intracellular bacterial infections are controlled by T(H)1-type CD4(+ve) T cells; (ii) indoleamine 2,3-dioxygenase is expressed in the placenta to prevent immunological rejection of the semi-allogeneic foetus; and (iii) pregnancy is a maternal T(H)2-type phenomenon. We discuss the relevance and validity of these paradigms for chlamydial abortion and reproductive immunology in sheep.
Gary Entrican; Sean Wattegedera; Nick Wheelhouse; Alasdair Allan; Mara Rocchi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-08-12
Journal Detail:
Title:  American journal of reproductive immunology (New York, N.Y. : 1989)     Volume:  64     ISSN:  1600-0897     ISO Abbreviation:  Am. J. Reprod. Immunol.     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-10-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8912860     Medline TA:  Am J Reprod Immunol     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  287-94     Citation Subset:  IM    
Moredun Research Institute, Pentlands Science Park, Bush Loan, Edinburgh, Scotland, UK.
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Grant Support
BBE0189391//Biotechnology and Biological Sciences Research Council

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