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    Jefferson Adams

    Monocytes Differentiated with IL-15 Support Th17 and Th1 Responses to Wheat Gliadin

    Jefferson Adams
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    Celiac.com 03/10/2010 - A team of researchers recently observed that monocytes differentiated with IL-15 support Th17 and Th1 responses to wheat gliadin. They discuss the implications of this discovery for celiac disease in a recent article in Clinical Immunology.

    The research team included K. M. Harris, A. Fasano, and D. L. Mann of the Pathology Department at the University of Maryland School of Medicine.



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    It is understood that interleukin (IL)-15 contributes to the immuno-pathogenesis of celiac disease. However, the effect of IL-15 on APC that shape adaptive immune responses to gliadin is not well understood. Using PBMC from healthy individuals, the team demonstrated that monocytes differentiated with IL-15 (IL15-DC) produced IL-1beta, IL-6, IL-15, IL-23, TNFalpha and CCL20 in response to pepsin-trypsin digested gliadin (PTG) and activated contact-dependent Th17 and Th1 responses from autologous CD4(+) T cells.

    Compared with control subjects, PBMC from celiac disease patients showed lower concentrations of IL-15 augmented IFNgamma responses to PTG. So, by generating IL15-DC, IL-15 supports Th17 and Th1 responses to a dietary antigen that produces no such responses in healthy individuals.The team notes that IL-15 hypersensitivity may cause these potentially pathogenic immune responses to develop in celiac patients, but not in healthy individuals.

    They conclude that the pathogenesis of celiac disease is likely due in part to genetic and/or environmental factors that control IL-15 expression and responsiveness in the gut.

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  • About Me

    Jefferson Adams is Celiac.com's senior writer and Digital Content Director. He earned his B.A. and M.F.A. at Arizona State University, and has authored more than 2,500 articles on celiac disease. His coursework includes studies in science, scientific methodology, biology, anatomy, medicine, logic, and advanced research. He previously served as SF Health News Examiner for Examiner.com, and devised health and medical content for Sharecare.com. Jefferson has spoken about celiac disease to the media, including an appearance on the KQED radio show Forum, and is the editor of the book "Cereal Killers" by Scott Adams and Ron Hoggan, Ed.D.


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