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Blood test could improve graft-versus-host disease treatment
Date:1/8/2010

ANN ARBOR, Mich. University of Michigan researchers have identified the first biomarker of graft-versus-host disease of the skin. The discovery makes possible a simple blood test that should solve a treatment dilemma facing doctors with patients who frequently develop rashes after bone marrow transplants. The biomarker also makes it possible to predict who is at greatest risk of dying of graft-versus-host disease, or GVHD.

GVHD is a serious, frequently fatal complication of allogeneic bone marrow transplants. These transplants, in which a person's own bone marrow cells are replaced with bone marrow cells from a donor, are a common treatment for children and adults with sickle cell anemia, leukemia, lymphoma, myeloma and other blood diseases.

Rashes are very common in patients after bone marrow transplants. They may signal the onset of acute GVHD. But until now, a skin biopsy was the only reliable way for doctors to determine whether the rash is caused by antibiotics commonly used to treat bone marrow transplant patients, or is instead GVHD of the skin, where the disease appears in about half of cases.

Because a firm diagnosis is not easy and the threat of GVHD is grave, many doctors who suspect a rash is due to GVHD prescribe systemic high-dose steroids to suppress GVHD, which further weaken a patient's already compromised immune system.

The U-M scientists identified a key biomarker or signature protein of GVHD of the skin called elafin. Elafin levels can be measured in a blood test to identify which bone marrow transplant patients with skin rashes actually have GVHD.

The test, which U-M hopes to make available to clinicians soon, will make informed treatment possible, says James Ferrara, M.D., Ruth Heyn Endowed Professor of Pediatrics and Communicable Diseases and director of the bone marrow transplant program at U-M. He is senior author of the study, which appears online this week in Science Translati
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Contact: Anne Rueter
arueter@umich.edu
734-764-2220
University of Michigan Health System
Source:Eurekalert

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