5 Key Takeaways

• 1

  Retinitis pigmentosa (RP) still lacks a definitive molecular diagnosis in 30–50% of cases despite advances in genetics.

• 2

  A new study identifies noncoding small nuclear RNAs (snRNAs) as a class of disease-causing genes in RP.

• 3

  Variants in RNU4-2 and RNU6 paralogs were found to cause nonsyndromic autosomal dominant RP in affected individuals.

• 4

  The study identified pathogenic variants in 153 individuals from 67 families, with recurrent changes in a conserved U4/U6 duplex region.

• 5

  These findings suggest snRNA genes should be included in future diagnostic pipelines for unresolved RP cases.