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Characterization of IL-17A-Producing Cells in Celiac Disease Mucosa

Celiac.com 02/03/2010 - Celiac disease increases production of IL-17A by cells that also make IFN-gamma. Recently, a research team set out to characterize the expression of IL-17A-producing cells in celiac disease.

The team included I. Monteleone, M. Sarra, G. Del Vecchio Blanco, O. A. Paoluzi, E. Franzè, D. Fina, A. Fabrizi, T. T. Macdonald, F. Pallone, and G. Monteleone of the Department of Internal Medicine at the University of Tor Vergata in Rome, Italy.

Infiltration of the mucosa with IFN-gamma-secreting Th1 cells is one of the features associated with celiac disease. Recent studies have shown the pathogenic effects previously attributed to Th1 cells may in fact be caused by a novel subset of T cells, termed Th17 cells, and noted for expressing high levels of IL-17A.

In this study, the team set out to characterize the expression of IL-17A-producing cells in celiac disease. Using real-time PCR and ELISA, the team showed that expression of IL-17A RNA and protein is greater in active celiac disease biopsy specimens than in specimens from inactive celiac disease, and normal mucosal biopsies.

Through flow cytometry, the team confirmed that the mucosa of celiac disease patients overproduces IL-17A, and that the main sources for this overproduction were CD4(+) and CD4(+)CD8(+) cells.  Most IL-17A-producing CD4(+) and CD4(+)CD8(+) cells co-expressed IFN-gamma but did not co-express CD161.

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Including a peptic-tryptic digest of gliadin to ex-vivo organ cultures of duodenal biopsy specimens taken from patients with inactive celiac disease enhanced IL-17A production 
by both CD4(+) and CD4(+)CD8(+) cells.

Since the team showed earlier that patients with celiac disease overproduced IL-21, a T cell-derived cytokine involved in the control of Th17 cell responses, they next determined whether IL-21 was responsible for regulating IL-17A expression.

Blocking IL-21 action with a neutralizing IL-21 Ab lowered total IL-17A expression in cultures of active celiac disease and peptic-tryptic digest of gliadin-treated celiac disease biopsy specimens.

From the data, the team concludes that celiac disease increases IL-17A, which is produced by cells that also produce IFN-gamma.

Source: Journal of Immunology, 2010 Jan 8.

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Hi! My daughter is 19 was diagnosed at age 16. It took about 12-18 month s for her to fully heal from the damage and feel "normal" again. Also because of the damage done she had reactions to dairy, so you may want to try no or minimum dairy until youre fully healed. Just a suggestion. Hope you start feeling well soon!

Hi yall! New to this blog, but really glad it exists because I have lots of questions. First off, I'm Allie! I'm 17 and newly diagnosed Celiac after about 3 years of searching for answers. I initially went gluten-free on the recommendation of a friend, I felt better in about a month and then my pediatric gastroenterologist had me do the gluten challenge, and my symptoms were the worst they have ever been, and ones I barely noticed before became very present. I did the biopsy and was diagnosed, it's been about 2 weeks and my symptoms are still pretty bad, although my diet has no known sources of gluten or cross contamination. Wondering if anyone has any input on healing post gluten challenge, any tips or how long it took for you would be quite helpful! Thanks

Might want to look into a keto diet, I have UC on top of celiacs and keto is working great Yeah I have major nerve and brain issues with gluten, gluten ataxia with nerve issues and brain issues. Seems to cause my body to attack my brain and nerve system. My brain stumbles fogs, and starts looping, the confusion causes me to become really irritable, I call it going Mr Hyde. Like my mind will start looping constantly on thoughts and not move driving me literally mad, or it used to. Now days it is primary the numbness anger but the gut issues and sometimes random motor loss limit me motionless to the floor now days for the duration of the major anger effects. Used to be a lot more mental then painful gut. I did a mental trauma post on it on while back where I came out about all my mental issues with gluten.

^^^^^^ good info, tips and tricks^^^^^^^^^ yes, crumbs will make you sick. also, breathing flour/pancake mix, etc that is in the air because eventually, you're going to swallow some.

Hello I was diagnosed Dec 15 of last year and went totally gluten-free the next day. I actually got worse before I got better - it's a steep learning curve - but now, 4 1/2 months later I'm finally seeing improvement. Hang in there.