Genetic clues to young onset Parkinson's disease found in large global study

For people who develop Parkinson's disease before age 50, the cause has often been a mystery. A new global analysis of genetic data now points to specific spots in our DNA that may trigger the illness early in life. Researchers looked at over 1,500 patients with Parkinson's and more than 20,000 healthy people to find these links. They focused on common and rare genetic changes that might increase risk. The study involved experts from the Global Parkinson's Genetic Program and other major international groups. They found six new locations in the genome that are strongly connected to early-onset cases. They also found nine more locations when looking at how genes work together. People who got sick between ages 18 and 40 had higher genetic risk scores than those who developed the disease later. This helps explain why some people get the disease so young while others do not. The findings suggest that having two copies of a specific gene change might drive this risk. However, scientists say these results need to be checked by other teams before they are used in clinics. This research is a step toward precision medicine, which tailors care to a person's unique biology. Understanding these genetic roots could one day help doctors predict who is at risk and find new ways to stop the disease before it starts.