Article (Scientific journals)
IL-4R{alpha}-responsive smooth muscle cells increase intestinal hypercontractility and contribute to resistance during acute Schistosomiasis.
Marillier, Reece G; Brombacher, Tiroyaone M; Dewals, Benjamin G et al.
2010In American Journal of Physiology - Gastrointestinal and Liver Physiology, 298 (6), p. 943-51
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Keywords :
Animals; Gastrointestinal Motility/genetics/physiology; Gene Expression Regulation/physiology; Genetic Predisposition to Disease; Heterozygote; Interleukin-13/genetics/metabolism; Intestines/pathology/physiology; Mice; Mice, Knockout; Muscle Contraction/genetics/physiology; Myocytes, Smooth Muscle/metabolism; Receptors, Cell Surface/genetics/metabolism; Schistosomiasis mansoni/genetics/immunology/metabolism; Signal Transduction; Specific Pathogen-Free Organisms
Abstract :
[en] Interleukin-(IL)-4 and IL-13 signal through heterodimeric receptors containing a common IL-4 receptor-alpha (IL-4Ralpha) subunit, which is important for protection against helminth infections, including schistosomiasis. Previous studies demonstrated important roles for IL-4Ralpha-responsive hematopoietic cells, including T cells and macrophages in schistosomiasis. In this study, we examined the role of IL-4Ralpha responsiveness by nonhematopoietic smooth muscle cells during experimental acute murine schistosomiasis. Comparative Schistosoma mansoni infection studies with smooth muscle cell-specific IL-4Ralpha-deficient (SM-MHC(cre)IL-4Ralpha(-/flox)) mice, heterozygous control (IL-4Ralpha(-/flox)) mice, and global IL-4Ralpha-deficient (IL-4Ralpha(-/-)) mice were conducted. S. mansoni-infected SM-MHC(cre)IL-4Ralpha(-/flox) mice showed increased weight loss and earlier mortalities compared with IL-4Ralpha(-/flox) mice, despite comparable T(H)2/type 2 immune responses. In contrast to highly susceptible IL-4Ralpha-deficient mice, increased susceptibility in SM-MHC(cre)IL-4Ralpha(-/flox) mice was not accompanied by intestinal tissue damage and subsequent sepsis. However, both susceptible mutant mouse strains failed to efficiently expel eggs, demonstrated by egg reduction in the feces compared with control mice. Reduced egg expulsion was accompanied by impaired IL-4/IL-13-mediated hypercontractile intestinal responses, which was present in the more resistant control mice. Together, we conclude that IL-4Ralpha responsiveness by smooth muscle cells and subsequent IL-4- and IL-13-mediated hypercontractility are required for host protection during acute schistosomiasis to efficiently expel S. mansoni eggs and to prevent premature mortality.
Disciplines :
Immunology & infectious disease
Author, co-author :
Marillier, Reece G
Brombacher, Tiroyaone M
Dewals, Benjamin G  ;  Université de Liège - ULiège > Immunologie et vaccinologie
Leeto, Mosiuoa
Barkhuizen, Mark
Govender, Dhirendra
Kellaway, Lauriston
Horsnell, William G C
Brombacher, Frank
Language :
English
Title :
IL-4R{alpha}-responsive smooth muscle cells increase intestinal hypercontractility and contribute to resistance during acute Schistosomiasis.
Publication date :
2010
Journal title :
American Journal of Physiology - Gastrointestinal and Liver Physiology
ISSN :
0193-1857
eISSN :
1522-1547
Publisher :
American Physiological Society
Volume :
298
Issue :
6
Pages :
G943-51
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 June 2010

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