Psoriasis: 7 New Genetic Clues
Newly Discovered Genetic Variations May Make Psoriasis More Likely, Study Shows
April 3, 2008 -- Scientists have discovered seven genetic variations linked
If confirmed in other studies, those gene variants may make good targets for
new psoriasis drugs, note the researchers, who included Anne Bowcock, PhD,
genetics professor at Washington University School of Medicine in St.
"Common diseases like psoriasis are incredibly complex at the genetic
level," Bowcock says in a news release. "Our research shows that small
but common DNA differences are important in the development of psoriasis.
Although each variation makes only a small contribution to the disease,
patients usually have a number of different genetic variations that increases
their risk of psoriasis and psoriatic arthritis."
Bowcock's team compared DNA from 223 psoriasis patients (including 91 with
psoriatic arthritis) and 519 people without
psoriasis, and also from two other large groups of people with and without
Through those comparisons, the researchers identified seven genetic
variations linked to psoriasis and psoriatic arthritis and confirmed other
variations already linked to psoriasis.
One of the newly discovered variants is in a genetic region tied to
four other autoimmune diseases: celiac disease, type 1 diabetes, Grave's
disease, and rheumatoid arthritis.
Further studies are needed to confirm the findings, Bowcock and colleagues
note in the April 4 online edition of Public Library of Science