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A better way to study the stomach flu

By R&D Editors | March 17, 2015

Rice Univ. bioengineers are teaming with colleagues from Baylor College of Medicine and MD Anderson Cancer Center to apply the latest techniques in tissue engineering toward the study of one of the most common and deadly human illnesses—the stomach flu.

The bacteria and viruses that cause acute gastroenteritis often come from contaminated food or water and result in cramps, nausea, diarrhea and vomiting. In medical terms, these pathogens fall under the heading of “human enteric disease,” and while they may be common, they can also be deadly. Diarrheal diseases still account for about 17% of worldwide human deaths each year, and they are the second-leading killer of children five and younger.

One roadblock to studying enteric pathogens like human rotaviruses and E. coli is that the organisms behave differently in humans than they do in animals typically used in medical research. Stem cell research has led to recent breakthroughs in the development of more realistic cell culture models, but there’s room for improvement.

“Infectious-disease labs that study enteric disease need better models that faithfully simulate the physiology of the intestine,” Rice tissue engineering researcher Jane Grande-Allen, the Isabel C. Cameron Professor of Bioengineering. ”This organ contains multiple types of cells that are arranged in complex patterns, and these tissues are constantly on the move. They contract and expand all the time, and we suspect some pathogens take advantage of that motion to mount their attacks.”

Thanks to a $5.1 million grant from the National Institutes of Health, Grande-Allen and colleagues at Baylor and MD Anderson are embarking on a five-year program to create a bioreactor that more closely simulates the complex tissues and dynamic movements of the intestinal track.

“This kind of problem can only be solved with teamwork because it requires expertise in enteric disease, cell biology, tissue engineering, bioreactor design and more,” said Baylor’s Mary Estes, the Cullen Chair of Molecular and Human Virology and principal investigator on the grant from the National Institute of Allergy and Infectious Diseases. “No single institution has all of that expertise, but thanks to the resources in the Texas Medical Center, we have assembled a team that is uniquely qualified to meet this challenge.”

Grande-Allen’s lab will work with Baylor’s Mary Dickinson, the Morrow Chair in Molecular Physiology and Biophysics, to create a platform that will allow cultures to be mechanically stimulated and that will promote cell differentiation and tissue patterning. Other research teams will work on creating enteroid cultures, tests involving infectious pathogens and identifying commensal gut bacteria, or probiotics, that may help fend off common pathogens like rotavirus and E. coli.

Grande-Allen said the team’s five-year goal is to deliver a simple, easy-to-use and relatively inexpensive system that could be easily implemented by any infectious disease lab.

Source: Rice Univ.

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