Autism-associated biomarkers: test-retest reliability and relationship to quantitative social trait variation in rhesus monkeys.
All,
Researchers studying autism in rhesus monkeys found that low levels of a brain chemical called arginine vasopressin were reliably linked to greater social difficulties, suggesting this could be a stable biological marker that may one day help understand social challenges in individuals with autism-related conditions like 16p11.2 syndromes.