Blood Test Could Predict Suicide Risk

摘要

Suicide ravages freely, claiming old and young, rich and poor, famous and unknown. But some people face increased risk, and current tests don't spot them early enough to intervene effectively. In July, molecular biologist Zachary Kaminsky of Johns Hopkins University and his team reported a simple way to detect people with suicidal tendencies - with a blood test. They examined DNA from brain tissue of people who died by suicide and those who died of other causes and measured its methylation - levels of chemicals called methyl groups on DNA that alter gene expression. They found that a stress-mitigating gene called SKA2 was less active in those who died by suicide and was more likely to be methylated. Experts believe that when SKA2 is too sluggish, some people can't stop their negative thoughts and fears.