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21
Nov

Probiotic worm treatment may improve colitis by restoring gut bacteria to healthy state

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Probiotic worm treatment may improve symptoms of colitis by restoring gut bacteria to healthy state

A new study on monkeys with chronic diarrhea that were treated by microscopic parasite worm (helminth) eggs has provided insights on how this form of therapy may heal the intestine. This condition in monkeys is similar to the inflammatory bowel diseases that affects up to 1.4 million Americans.

The study, published today in the Open-Access journal PLOS Pathogens, shows that helminths can restore the balance of gut bacterial communities to the monkeys with chronic diarrhea. Inflammatory bowel diseases are driven by a misdirected immune response against gut bacteria (the microbiome) and are often associated with alterations in gut bacterial communities (known as dysbiosis).

"The idea for treating colitis with worms is not new, but how this therapy might work remains unclear," says the study's senior corresponding author, P'ng Loke, PhD, assistant professor of microbiology at NYU Langone Medical Center. "Our findings suggest that exposure to helminths may improve symptoms by restoring the balance to the microbial communities that are attached to the intestinal wall."

Because inflammatory bowel diseases are more common in countries with developed economies and is rare in developing countries, researchers have hypothesized that endemic helminth infections in developing countries may offer protection against this disease. In animal models of autoimmunity these worms have suppressed inflammation, and clinical trials indicate that helminth therapy can be beneficial in inflammatory bowel diseases.

Juvenile monkeys kept in captivity often spontaneously develop chronic diarrhea that is difficult to treat by veterinarians. Dr. Loke and his colleagues treated 5 monkeys with chronic diarrhea with microscopic helminth eggs and collected tissue samples before and after treatment.

Tissues samples taken before treatment from sick monkeys had many more attached bacteria than healthy monkeys and the types of attached bacteria were completely altered (dysbiosis). This attachment of altered bacteria was associated with a very strong inflammatory response. After treatment, the types of bacteria attached to tissue samples were much more similar to healthy monkeys, and 4 out of 5 monkeys had less diarrhea and started to gain weight.

Dr. Loke and colleagues are now embarking on a new clinical trial designed to study how pig helminth eggs (TSO) may relieve symptoms of ulcerative colitis (UC) and have started enrolling patients at NYU Langone Medical Center. TSO is being used because it can be produced under pathogen free conditions certified by the FDA for clinical trials and cannot be transmitted from person to person.

 

 

Source: http://www.eurekalert.org/pub_releases/2012-11/plos-pwt111212.php

 

Probiotic worm treatment may improve colitis by restoring gut bacteria to healthy stateDynamic Neural Retraining Program (DNRS)

 

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