Past studies suggest potential therapies for newly discovered retinitis pigmentosa mutations in U6 and U4 snRNAs

Sequencing of whole genomes from hundreds of thousands of people has made it possible to track down the genetic causes of many inherited diseases by correlating the presence of rare sequence variants with the disease in affected families (Posey et al. 2019). Only a small fraction of the human genome codes for proteins but much of the genome is transcribed, so disease variants are increasingly being found in noncoding RNAs. A very recent report describes mutations in the genes for two RNA components of the spliceosome, U4 and U6 small nuclear (sn)RNAs, that are associated with the progressive vision disorder retinitis pigmentosa (RP; Quinodoz et al. 2026). The correspondence of the U6 RP mutations with mutations studied in detail in brewer’s yeast suggests possible disease mechanisms and therapies.