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Post by jmo on Feb 2, 2011 14:08:24 GMT -5
LONDON – Scientists have identified five new genes linked to Parkinson's disease in a large genetic analysis of the illness, according to a new study. After reviewing nearly 8 million possible genetic mutations, researchers pinpointed five genes connected to Parkinson's disease. Previously, six other genes were identified, and experts say there is now increasing proof the degenerative disease is sparked by peoples' genes. The discovery doesn't mean there are any new treatments just yet, but experts are optimistic they are getting closer. "The major common genetic variants for Parkinson's have been found," said Nick Wood, a professor at the Institute of Neurology at University College London, one of the researchers who led the study. "We haven't put together all the pieces of the puzzle yet, but we're not that far off," he said. He predicted a diagnostic test might be ready within a few years. Until recently, scientists hadn't been sure what caused Parkinson's disease, but assumed environmental factors such as exposure to chemicals or past head injuries were largely to blame. Scientists analyzed genetic samples from more than 12,000 people with Parkinson's disease and more than 21,000 from the general population in Europe and the U.S. They found people with the highest number of mutations in the 11 genes linked to Parkinson's were two-and-a-half times more likely to develop the disease than people who had the least amount of mutations. more
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