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Dutch Researchers Discover Grain Protein Homology Responsible for Toxicity in Celiacs

Gastroenterology, Oct 2003, Vol 125, No 4, p1105-13

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Celiac.com 10/30/2003 – It has long been known that celiac disease is caused by T-cell responses to wheat gluten-derived peptides, but the toxicity of other widely consumed grains has not been well studied. The researchers who conducted this study were aimed at determining the toxic T-cell stimulatory properties of barley hordeins, rye secalins, and oat avenins. Except for one instance, they found that there were no identical T-cell stimulatory gluten peptide matches in these grains. There were, however, similar responses found in "11 homologous sequences in hordeins, secalins, and avenins located in regions similar to those in the original gluten proteins," and seven of the 11 peptides were recognized by gluten-specific T-cell lines and/or clones from patients with celiac disease. The team discovered that key amino acids can be substituted, which will either partially or totally stop the T-cell stimulation by the gluten peptides, and that "single nucleotide substitutions in gluten genes will suffice to induce these effects."

The researchers conclude: "These results show that the disease-inducing properties of barley and rye can in part be explained by T-cell cross-reactivity against gluten-, secalin-, and hordein-derived peptides. Moreover, the results provide a first step toward a rational strategy for gluten detoxification via targeted mutagenesis at the genetic level."

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3 Responses:

 
annie
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said this on
28 May 2008 5:44:06 PM PDT
So, for the non-scientist, what does this mean? That rye is ok, for celiacs? That oats are not? That they create the same reaction? This is confusing. It would be good to have a couple lines for the novice in there.

 
Sherry
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said this on
27 Aug 2008 8:02:28 PM PDT
I agree with Annie. In addition it sounds like they believe the answer lies in mutating genes (Of the grains?). My thanks to all the companies and individuals who have developed tasty recipes that deal naturally with gluten intolerance.

 
Karen
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said this on
29 Dec 2008 5:45:12 PM PDT
I agree with Annie and Sherry! I am 39 now and diagnosed at the age of 2. I have done much reading and research on being celiac to maintain my health. The info given above about new research being done would be wonderful as most celiacs try to stay on top of new info and options......However it sure would be nice as a lay person to understand what has been written. The above seems intriguing but becomes a tease because it is hard to decipher and understand.




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^^^^^^ 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.

Called my GI doctor today to make sure he is going to look at my small intestine and do biopsy for Celiac for my EGD and he is. Thanks for the tip everyone about have to start eating gluten again. The office told me to break my gluten free diet and start eating gluten everyday until my EGD. Here's to being miserable again for a few weeks ???

I can completely relate! The horrible mental effects that I have been living with for years is the absolute worst side effect of eating gluten, HANDS DOWN. Worse than the endless tummy aches, worse than the constant diarrhea, worse than the week long migraines, worse than the daily fatigue and body pain.... I honestly though there was something seriously wrong with me and hated my life because of how I felt mentally. I always felt like I was drowning, not in control of my thoughts, trapped in some unexplained misery. My head was always so cloudy, and I was mad because I always felt so slow and stupid. I would feel so lethargic and sad and empty while at the same time be raging inside, wanting to rip out of my own skin. I was mean, terrible, would snap at the people closest to me for no good reason and just felt like I hated everyone and everything. Think of how crappy you feel when you have a terrible cold and flu - I felt that crappy, but mentally. Some days were really bad, some were mild. I always thought it was because I was getting a migraine, or because I had a migraine, or because I had just overcome a migraine, because I didn't sleep well, because....always a random reason to justify why we have all these weird unrelated symptoms before we get diagnosed. I'm happy to say that I have been gluten-free for about 2 months now and though I am not symptom free, the first thing that improved was my mood. I no longer feel foggy and miserable. For the first time in years, my head is clear, I can actually think, and I feel positive and like I am in control of what's going on in my head. I don't hate the world. I don't spend every day bawled up on the corner of the couch depressed and angry. The release of these horrible symptoms is enough to never make me want to cheat, no matter what I have to miss out on. So insane how a little minuscule amount of a stupid protein can wreck such havoc.

I wanted to collect some of the info on NCGI in one place so that visitors who test negative but may still have an issue with gluten can be directed there. I'll add to this post as I find new links, but feel free to add or contribute anything you think may be of use! Matt --- Useful links: An overview from Alessio Fasano, one of the world's leading researchers on celiac and gluten sensitivity: https://www.youtube.com/watch?v=VvfTV57iPUY Umberto Volta, another leading researcher in the field gives some of the latest findings about NCGI: Presentation slides from Dr Volta's visit to Coeliac UK - NCGS about halfway through A scholarly overview from celiac disease magazine: https://www.researchgate.net/profile/Knut_Lundin/publication/232528784_Non-celiac_Gluten_Sensitivity/links/09e415098bbe37c05b000000.pdf A good overview from a sceptical but fair perspective: https://sciencebasedmedicine.org/a-balanced-look-at-gluten-sensitivity/ Another overview: https://celiac.org/celiac-disease/understanding-celiac-disease-2/non-celiac-gluten-sensitivity-2/ University of Chicago's excellent celiac site's take: http://www.cureceliacdisease.org/category/faq-non-celiac-gluten-sensitivity/ A compelling account in the British Medical Journal from an NCGI patient: http://www.bmj.com/content/345/bmj.e7982 Here's some positive news about a potential new test: http://www.medicaldaily.com/non-celiac-gluten-insensitivity-blood-test-392850 NCGI in children: NCGI and auto immune study: https://www.ncbi.nlm.nih.gov/pubmed/26026392 Also consider: Fodmaps: http://www.kcl.ac.uk/lsm/research/divisions/dns/projects/fodmaps/faq.aspx This Monash study: http://fodmapmonash.blogspot.co.uk/2015/03/the-truth-behind-non-celiac-gluten.html suggested some who think they're reacting to gluten should actually be reducing fodmaps Sibo: http://www.webmd.boots.com/digestive-disorders/small-intestinal-bacteria-sibo