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Toward a pill to enable celiac patients to eat foods containing gluten

Date:
December 19, 2012
Source:
American Chemical Society
Summary:
Scientists are reporting an advance toward development of a pill that could become celiac disease's counterpart to the lactase pills that people with lactose intolerance can take to eat dairy products without risking digestive upsets. The approach involves an enzyme that breaks down the gluten that causes celiac symptoms.
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In the future, pills could allow celiac disease sufferers to eat gluten in breads, pastries and other grain products.
Credit: © zigzagmtart / Fotolia

Scientists are reporting an advance toward development of a pill that could become celiac disease's counterpart to the lactase pills that people with lactose intolerance can take to eat dairy products without risking digestive upsets.

They describe the approach, which involves an enzyme that breaks down the gluten that causes celiac symptoms, in the Journal of the American Chemical Society.

Justin Siegel, Ingrid Swanson Pultz and colleagues explain that celiac disease is an autoimmune disorder in which the gluten in wheat, rye or barley products causes inflammation in the digestive tract. Enzymes in the stomach break down gluten into smaller pieces, called peptides. For most people, these peptides are harmless. But for the 2 million-3 million Americans with celiac disease, the peptides trigger an autoimmune response and painful symptoms. Currently, the only treatment is a gluten-free diet. However, the scientists reasoned that if an enzyme could further break down the offending peptides in the stomach, celiac patients might be able to eat gluten-containing foods.

They describe discovery of a naturally occurring enzyme that has some of the ideal properties for doing so. The scientists modified the enzyme in the laboratory so that it would meet all the necessary criteria. The new enzyme (called KumaMax) broke down more than 95 percent of a gluten peptide implicated in celiac disease in acidic conditions like those in the stomach. "These combined properties make the engineered [enzyme] a promising candidate as an oral therapeutic for celiac disease," say the researchers.

The authors acknowledge funding from the Howard Hughes Medical Institute and the Defense Advanced Research Projects Agency.


Story Source:

The above post is reprinted from materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Sydney R. Gordon, Elizabeth J. Stanley, Sarah Wolf, Angus Toland, Sean J. Wu, Daniel Hadidi, Jeremy H. Mills, David Baker, Ingrid Swanson Pultz, Justin B. Siegel. Computational Design of an α-Gliadin Peptidase. Journal of the American Chemical Society, 2012; 134 (50): 20513 DOI: 10.1021/ja3094795

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American Chemical Society. "Toward a pill to enable celiac patients to eat foods containing gluten." ScienceDaily. ScienceDaily, 19 December 2012. <www.sciencedaily.com/releases/2012/12/121219133558.htm>.
American Chemical Society. (2012, December 19). Toward a pill to enable celiac patients to eat foods containing gluten. ScienceDaily. Retrieved September 3, 2015 from www.sciencedaily.com/releases/2012/12/121219133558.htm
American Chemical Society. "Toward a pill to enable celiac patients to eat foods containing gluten." ScienceDaily. www.sciencedaily.com/releases/2012/12/121219133558.htm (accessed September 3, 2015).

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