Simple Urine Test May Help Diagnose Autism with High Accuracy

Researchers at Arizona State University have developed a novel urine test capable of identifying specific microbial metabolites in the gut. This breakthrough tool, detailed in the journal 'Molecular Psychiatry,' analyzes 17 such metabolites in children aged 2 to 11. The findings suggest a consistent biological pattern in many children with autism: elevated levels of certain gut-produced compounds.

The test measures these compounds in urine, allowing scientists to differentiate between children with autism and those developing typically with remarkable accuracy. Elevated metabolites include those derived from tyrosine, tryptophan, and phenylalanine, amino acids crucial for neurotransmitter pathways, as well as compounds linked to yeast and fungal activity. This could pave the way for more personalized therapies, including those aimed at restoring a healthy gut microbiome.

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We found that 80 to 90 percent of children with autism have extremely high levels of one or more microbial metabolites.

During trials, the urine test demonstrated high precision, achieving 90% sensitivity and 100% specificity. This means it correctly identified 90% of children with autism and did not misdiagnose any typically developing children. The study involved 52 children diagnosed with autism spectrum disorder and 47 typically developing children in the U.S. The differences were stark: nearly all children with autism showed elevated levels of at least one metabolite, with some readings being 100 to 1000 times higher than normal. On average, children with autism had about three elevated metabolites, while typically developing children had none.

Scientists expressed surprise that the detected metabolites are modified versions of serotonin and dopamine, key neurotransmitters influencing mood, cognitive function, and memory. This connection could potentially explain many autism-related symptoms and co-occurring conditions. The researchers believe this test could help identify young children at high risk for autism and guide treatment for those already diagnosed, enabling them to live better lives.

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Using this test will allow us to identify which young children are at high risk for an autism diagnosis, and it will also help guide treatment for those already diagnosed to help them live their best lives.