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Scientists used AI and genetic analysis to pinpoint variants in the BRSK1 gene as the likely cause of a rare neurodevelopmental disorder affecting children across seven unrelated families. The breakthrough began with a single undiagnosed child in Texas and expanded through global research networks. Fruit fly experiments confirmed the gene's critical role in brain development and neuron communication.
A team of researchers at Baylor College of Medicine and Texas Children's Hospital has identified variants in the BRSK1 gene as the probable cause of a rare, previously undiagnosed neurodevelopmental disorder. The discovery started with a single child enrolled in the Texome Project — a free genetic testing program for medically underserved Texans — whose case stumped standard genetic analysis. An AI tool called AI-MARRVEL flagged the BRSK1 gene as a strong candidate, and after connecting with other families through the GeneMatcher research network, the team studied 10 affected individuals from seven unrelated families.
All 10 individuals showed some degree of developmental delay, with symptoms ranging from mild to severe even within the same family — a hallmark of "variable expressivity." Common features included intellectual disability, autism spectrum disorder, ADHD, anxiety, low muscle tone, and microcephaly, with two individuals also experiencing seizures.
To validate their findings, researchers turned to fruit flies, whose sff gene mirrors BRSK1. Disabling the fly gene caused movement problems, seizure-like behavior, and shorter lifespans — all of which were largely reversed when the normal human BRSK1 gene was introduced, but only partially restored with the patient variants.
Key Takeaways:
Why it matters: For families living with rare, undiagnosed conditions, a genetic answer is life-changing — it opens doors to targeted research, clinical trials, and informed family planning. This study also showcases how combining AI, genomics, and model organism research can accelerate rare disease discovery.
