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AN-PEP Enzyme Digests Gluten in Healthy Volunteers, So What?

Celiac.com 10/23/2015 - Just as I finished writing about the failure of current commercial enzymes to effectively degrade gluten, an interesting study on another enzyme suggests that there may be help on the horizon, at least for people without celiac disease.

Image: Tolerase--DSM, inc.According to the latest press release, in lab conditions, aspergillus niger prolyl endoprotease (AN-PEP) efficiently degrades gluten molecules into non-immunogenic peptides. But so what?

If AN-PEP is to be effective in people with celiac disease or gluten-sensitivity, which would seem to be the whole point of an anti-gluten enzyme, it must effectively digest gluten in "non-healthy" subjects.

A team of researchers recently set out to assess AN-PEP on gluten degradation in a low and high calorie meal in healthy subjects. The research team included B.N. Salden, V. Monserrat, F.J. Troost, M.J. Bruins, L. Edens, R. Bartholomé, G.R. Haenen, B. Winkens, F. Koning, A.A. Masclee.

They are variously affiliated with the Division of Gastroenterology-Hepatology in the Department of Internal Medicine at NUTRIM, Maastricht University Medical Center, Maastricht, the Department of Immunohematology and Blood Transfusion at Leiden University Medical Centre in Leiden, the DSM Biotechnology Centre, Delft, the Department of Pharmacology and Toxicology, CARIM, at Maastricht University in Maastricht, and with the Department of Methodology and Statistics, CAPHRI, Maastricht University Medical Center in Maastricht, all in The Netherlands.

The team conducted a randomized, double-blind, placebo-controlled, cross-over study in which 12 healthy volunteers attended to four test days. Each volunteer received a liquid low or high calorie meal (4 g gluten) with AN-PEP or placebo administered into the stomach.

Using a triple-lumen catheter the team was able to sample gastric and duodenal aspirates, as polyethylene glycol (PEG)-3350 was continuously infused. 

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Acetaminophen in the meals tracked gastric emptying time. The team used gastric and duodenal samples to calculate 240-min area under the curve (AUC0-240 min ) of α-gliadin concentrations. The team calculated absolute α-gliadin AUC0-240 min using duodenal PEG-3350 concentrations.

The teams data showed that AN-PEP lowered α-gliadin concentration AUC0-240 min, compared to placebo, from low and high calorie meals in stomach (low: 35 vs. 389 μg × min/mL; high: 53 vs. 386 μg × min/mL; P < 0.001) and duodenum (low: 7 vs. 168 μg × min/mL; high: 4 vs. 32 μg × min/mL; P < 0.001) and absolute α-gliadin AUC0-240 min in the duodenum from low (2813 vs. 31 952 μg × min; P < 0.001) and high (2553 vs. 13 095 μg × min; P = 0.013) calorie meals.

In the placebo group, the high compared to low calorie meal slowed gastric emptying and lowered the duodenal α-gliadin concentration AUC0-240 min (32 vs. 168 μg × min/mL; P = 0.001).

These results confirm that AN-PEP significantly enhanced gluten digestion in the stomach of healthy volunteers, while increasing caloric density prolonged gastric residence time of the meal.

According to the authors, these results suggest that AN-PEP shows promise as an anti-gluten digestive enzyme for people with celiac disease, but further study is clearly needed.

Still, the fact that AN-PEP can effectively break down gluten in the stomach of healthy volunteers is a good start, but it means little if AN-PEP can’t do the same in people with celiac disease, which remains to be seen.

Stay tuned for more developments.

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Yes the first has wheat gluten in the ingredients, the second via the wheat flour. Here in the UK manufacturers HAVE to highlight gluten sources. Check the ingredients and if WHEAT, BARLEY, or RYE are mentioned *usually highlighted, italicised or underlined, then you will know there's gluten. Most of iceland's processed foods will probably be gluten filled to be honest. Any breadcrumbed or battered foods for instance. Ps, you and me both have another disease, the british one of apologising You don't need to, you're very welcome here and all of your questions are valid and understandable. It's going to get better

Hi, I am deeply sorry for posting on here again. As I am scheduled for an Endoscopy on the 9th May, I wanted to make sure that my gluten intake is being kept the same. I was wondering if the ingredients to these products contain gluten even though dextrose is in one of them? http://groceries.iceland.co.uk/iceland-32-breaded-chicken-nuggets-448g/p/52275 Chicken Breast Fillet (60%), Water, Wheat Flour, Breadcrumbs (Wheat Flour, Dextrose, Salt, Yeast), Rapeseed Oil, Salt, Wheat Gluten, Sugar, Yeast Extract, Garlic Powder, Onion Powder, White Pepper, Dried Sage. http://groceries.iceland.co.uk/iceland-10-breaded-chicken-burgers-550g/p/52276 Chicken Breast Fillet (60%), Water, Wheat Flour, Breadcrumbs (Wheat Flour, Dextrose, Salt, Yeast), Rapeseed Oil, Salt, Wheat Gluten, Sugar, Yeast Extract, Garlic Powder, Onion Powder, White Pepper, Dried Sage. Thank you for all your help so far,

JMG got it down pretty much, the painful and gluten effects from eating it should clear up in a month, damage symptoms you might notice some differences as early as 2-4months but most do not noticed major improvements til about 6 months to a year. I have been gluten-free for over 3 years all my villi have healed according to the doctor on my last scope. It is very important to not cheat and avoid any kind of CC as it can set you back weeks or months. I would suggest a whole foods only diet for the first month or two, no dairy, simple stews, soups, etc. make for easy to digest and simple meals. Check out the 101 thread for some good information. PS a new combo crockpot, steamer, rice cooker combo and liners for a crock pot will be a life saver for making simple meals and easy clean ups. Quick cook microwave ware will also be handy making sure you have gluten-free cooked meals if you can not get new cookware immediately. I normally suggest cleaning out the entire house, scrubbing down knobs, handles, on the drawers, sink, fridge, cubbards etc. throw out condiment jars, checking ingredients on everything in the house including your hygiene and makeup. Putting in drawer organizers for new utensils, throwing out scratched glass, teflon, plastic, and steel cookware. Throwing out any Tupperware, and cutting boards, some utensils that can not be cleaned well. Some times you can save cast iron and stainless steel cook ware if you can run it in your ovens cleaning cycle over 600F. Gluten is a protein like blood if you can not clean a item where a CSI team will not find it give it up, it is not a germ that can be killed with disinfectant. I use freezer paper for clean prep surfaces, also makes clean up a breeze, I tend to use gloves alot also when fixing foods,

Hi Allie and welcome First off, I know 3 years was a long wait, but at 17 you've figured out celiac way before many people do. That should make a big impact on minimising its effects and helping you with the diet, so, bizarrely enough, congratulations! A lot of good advice has been brought together in this thread: Don't worry that your symptoms are bad now. As you follow the diet your body will begin healing itself and you're still very young so hopefully this will go really smoothly. Think in terms of the next 6 months rather than weeks however, recovery will likely take a little time. Eat as healthily as you can, lots of whole foods and try to avoid the gluten free processed substitutes as your digestive system needs all the help it can get at this moment. You may want to avoid dairy as well for now and think about reintroducing it later. This site has been really helpful to me and others. I hope you find it just as useful. Best of luck! ps, your increased reaction to gluten during the challenge phase was perfectly normal. Many find that reintroducing it much worse than the initial affects and take some time to get over the challenge. That's why you'll see lots of posts here urging folks to 'stay on gluten' till their testing is complete! PPS( ) Inasmuch as your post can convey emotion, your's seemed positive Stay that way! At times the diet can be a bit isolating and some friends and family may struggle to understand. I'm sure it will be difficult at times making good choices and staying vigilant when everyone around you doesn't have to think twice. Stick with it, your health is paramount and it will be worthwhile. In time your good friends will get it and those that don't aren't worth worrying about. There are great foods you can eat and if not, learn to cook them yourself

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!