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Dartmouth researchers discover gene signatures for scleroderma
Date:7/15/2008

Hanover, NH-- Distinct genetic profiles can discern different groups of patients with scleroderma, a vexing autoimmune disease in which the body turns against itself, Dartmouth Medical School researchers report. Their discovery of distinguishing molecular subtypes within the disease offers new insight into the complexity of a poorly understood and hard to treat illness and opens a window for better diagnosis and targeted therapies.

Scleroderma is a chronic connective tissue disorder that can cause skin hardening and internal organ dysfunction and affects four times as many women as men. It captures a range of related conditions, from mild, localized to the skin, to systemic and life threatening.

Patient complications are variable and hard to predict, explains Dr. Michael Whitfield, assistant professor of genetics at DMS, who headed the research team. "We show that we can divide the patients even more finely than what is currently done clinically, and found a clear association between disease severity and gene expression. " The results were published online, July 16 in PLoS ONE, an open-access journal of the Public Library of Science.

"We show for the first time that we can classify patients with a systemic autoimmune disease into different groups by gene expression patterns alone," says Whitfield "Now that we have discovered new subsets at the molecular level, we can begin to map the genetic pathways to see if we can we use these signatures to predict who will progress to different clinical endpoints." The researchers hope to begin to understand which patients should be treated aggressively, for example, and which drugs benefit which patients.

"Scleroderma constitutes one of the most mysterious of human diseases. The studies by the Whitfield group are particularly noteworthy as they constitute the first genetic categorization of scleroderma," says Dr. William Rigby, a DMS rheumatolgist who treats scleroderma.
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Contact: Hali Wickner
hali.wickner@dartmouth.edu
Dartmouth Medical School
Source:Eurekalert

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