No popular authors found.
Ads by Google:

Categories

No categories found.


Get Celiac.com's E-Newsletter




Ads by Google:



Follow / Share


  FOLLOW US:
Twitter Facebook Google Plus Pinterest RSS Podcast Email  Get Email Alerts

SHARE:

Popular Articles

No popular articles found.
Celiac.com Sponsors:

Does the Preferential Expression of HLA-DQ2.5 Genes in Celiac Disease Impact T Cell Response?


Photo: CC--Money Images

Celiac.com 05/30/2016 - People with HLA genes have the highest risk factor for developing autoimmune disorders. The vast majority of people with celiac disease carry the HLA DQA1*05 and DQB1*02 alleles, both of which encode the DQ2.5 molecule.

A research team recently set out to examine the implications for anti-gluten T cell response of the preferential expression of HLA-DQ2.5 genes associated with celiac disease with respect to non-predisposing HLA genes. The research team included L Pisapia, A Camarca, S Picascia, V Bassi, P Barba, G Del Pozzo, and C Gianfrani. They are variously affiliated with the Institute of Protein Biochemistry-CNR, the Institute of Genetics and Biophysics-CNR in Naples, Italy, and the Institute of Food Sciences-CNR in Avellino, Italy.

In order to activate pathogenic CD4+ T lymphocytes, that is, to trigger active celiac disease, it is necessary for the body to form complexes between DQ2.5 and gluten peptides on antigen-presenting cells (APCs). It is widely accepted by clinicians that the DQ2.5 genes establish the different intensities of anti-gluten immunity, depending on whether they are in a heterozygous or a homozygous configuration, that is, whether both genes are activated, or only one gene is activated.

Ads by Google:

The research team's recent study shows that, in celiac patients, HLA DQA1*05 and DQB1*02 gene expression is much higher than expression of non-celiac-associated genes. This, in turn, impacts protein levels and causes a comparable cell surface exposure of DQ2.5 heterodimers between DQ2.5 homozygous and heterozygous celiac patients. As a consequence, the magnitude of the anti-gluten CD4+ T cell response is strictly dependent on the antigen dose, and not on the DQ2.5 gene configuration of APCs.

These findings are important, because they support the idea that the expression of DQ2.5 genes is an important risk factor in celiac disease.

The preferential expression of DQ2.5 alleles observed in this study offers a new explanation of why these genes are so frequently associated with celiac disease and with other autoimmune disorders.

Source:

Celiac.com welcomes your comments below (registration is NOT required).





Spread The Word







Related Articles



Comments




Rate this article and leave a comment:
Rating: * Poor Excellent
Your Name *: Email (private) *:




In Celiac.com's Forum Now:

All Activity
Celiac.com Celiac Disease & Gluten-Free Diet Forum - All Activity

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.