Athens, Ga. On the list of undesirable medical conditions, a parasitic worm infection surely ranks fairly high. Although modern pharmaceuticals have made them less of a threat in some areas, these organisms are still a major cause of disease and disability throughout much of the developing world.
But parasites are not all bad, according to new research by a team of scientists now at the University of Georgia, the Harvard School of Public Health, the Universit Franois Rabelais in Tours, France, and the Central South University, Changsha, Hunan, China.
A study published recently in Nature Medicine demonstrates that once inside a host, many parasitic worms secrete a sugar-based anti-inflammatory molecule that might actually help treat metabolic disorders associated with obesity.
The sugar molecule, or glycan, is released by parasites to help them evade the body's immune system. By reducing inflammation, they are better able to hide in tissues, and humans experience fewer symptoms that might reveal their presence.
"Obesity is an inflammatory disease, so we hypothesized that this sugar might have some effect on complications related to it," said Donald Harn, study co-author who worked on the research while at Harvard School of Public Health and is now Georgia Research Alliance Distinguished Investigator in the UGA College of Veterinary Medicine's Department of Infectious Diseases.
The researchers tested their hypothesis on mice fed a high-fat diet. Those in the control group exhibited many of the symptoms associated with excessive weight gain, such as insulin resistance, high triglycerides and high cholesterol.
Mice that received treatment with the sugar still gained weight, but they did not suffer the same negative health effects as those in the control.
"All of the metabolic indicators associated with obesity were restored to normal by giving these mice this sugar conjugate," said Harn,
|Contact: Donald Harn |
University of Georgia