A $7.7 million grant will establish a new center for asthma research at Washington University School of Medicine in St. Louis. Directed by Michael J. Holtzman, M.D., the Selma and Herman Seldin Professor of Medicine, the center will investigate the causes of asthma to develop new therapys for the disease. The center's funding comes from the National Institute of Allergy and Infectious Diseases (NIAID), one of the National Institutes of Health.

Named the Asthma and Allergic Diseases Cooperative Research Center, the center will conduct research specifically focused on how the body's protective mechanism, the immune system, contributes to asthma.

"Normally, immunity is under tight control," says Holtzman, who directs the Division of Pulmonary and Critical Care Medicine. "But if the immune response goes too far, it can cause inflammatory diseases like asthma."

Prior research showed that viral infections of the lungs at an early age could trigger long-term asthma. The researchers will test children with respiratory infections, measuring their body's response to the virus, and they will follow their respiratory health for five years.

"We will look at the cell biology and the biochemistry of the children's response to respiratory virus infection," Holtzman says. "We know the more severe the infection is, the more likely a patient is to develop asthma later. We want to know at the cell level what determines the severity of the infection and how we can intervene to prevent asthma."

Inflammation is the first response of the immune system, and current asthma therapys, including inhaled steroids, aid asthma sufferers by reducing inflammation. Unfortunately, steroids affect more than asthma symptoms.

"Steroids are flame-thrower drugs," Holtzman says. "They inhibit a number of aspects of the immune response - not only the one that causes asthma, but also the ones that protect you from pathogens."

Furthermore, steroid treatment is not a cure for asthma, Holtzman points out. Research at the new center will seek asthma-specific anti-inflammatory therapys and therapies that modify the underlying causes of the disease instead of simply suppressing symptoms.

The scientists will look at signals that cells use to rev up antiviral defenses. They suspect disruptions in the signals sent between cells to shut down the immune response could be the root cause of an excessive and prolonged inflammatory response.

Comparing deficient cell responses to excessive responses in genetically engineered experimental mice will help the scientists uncover biomarkers - proteins that can serve as indicators of the immune response to viral infection. The biomarkers can then reveal the level of specific immune responses in children with viral infections to help isolate the cause of asthma.

"We will be able to take what we find in the mice and immediately translate that into what we study in patients," Holtzman says.

In addition to Holtzman, key researchers in the center include John P. Atkinson, M.D., the Samuel Grant Professor of Medicine and professor of molecular microbiology, Jonathan M. Green, M.D., associate professor of medicine and of pathology and immunology, and Kenneth M. Murphy, M.D., Ph.D., professor of pathology and immunology. The center is part of a cooperative group of 11 U.S. centers with NIAID funding set up to look for causes and therapys for asthma.


Posted by: Emily    Source

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