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Penn researchers identify immune cells that fight parasites may promote allergies and asthma
Date:3/11/2010

PHILADELPHIA - Millions of people in both the developing and developed world may benefit from new immune-system research findings from the University of Pennsylvania School of Veterinary Medicine.

The Penn Vet researchers, studying how the immune system operates, have discovered a previously unidentified cell population that may be the body's double-edged sword, fighting off parasitic infections but also causing the harmful immune responses that can lead to allergies and asthma.

This cell population, termed multipotent progenitor cells, or MPP, appears to be activated in the context of allergies or infection with parasitic worms and may be one of the earliest cellular events in the developing immune response. The research published by David Artis, assistant professor in the Department of Pathobiology at Penn Vet, and colleagues may identify an important process in the immune response to helminth parasites and allergies.

A better understanding of what regulates the development of this cell population and what promotes its activation and function may aid in the development of drugs.

The research could benefit two patient populations: Those in developing countries still wrestling with parasitic worm infections and those in more industrialized environments where parasites are less prevalent but where immune responses can run amok, leading to a higher prevalence of allergies and asthma.

Millions worldwide struggle with health problems due to parasitic worms. These helminth worm parasites thrive in unsanitary conditions, in uncooked meat and in contaminated water. In more sanitary regions with fewer helminth parasites, the immune response that evolved to fight these infections may be redundant. It has been proposed that, due to reduced exposure to helminth parasites, the inactive immune response may inappropriately respond to substances like pollen, pollutants and some contents of food, resulting in exaggerated rates of as
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Contact: Jordan Reese
jreese@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert

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