New ReNU2 Syndrome Emerges: A Non-Coding RNA Defect Driving Neurodevelopmental Disorder

A study identifies a newly named neurodevelopmental disorder called ReNU2 syndrome caused by a recessive mutation in the non-coding RNU2-2 gene. By analyzing genome data from more than 110,000 individuals, researchers linked loss of the U2-2 RNA to developmental delays, limited speech, low muscle tone, and autism-like and movement-related traits, with epilepsy or respiratory/feeding issues varying among patients. They estimate ReNU2 could account for around 10% of recessive ND cases with a known genetic basis and hope this work will guide future diagnostics and potential gene-replacement therapies, though delivering treatment to affected brain cells remains a challenge. The finding highlights the importance of non-coding genes in disease and is published in Nature Genetics.