Werner syndrome results from biallelic mutations in the WRN gene on chromosome 8, leading to accelerated aging symptoms. Researchers at Sumitomo Pharma Co. Ltd. have reported the development and characterization of WRN-108, a splice-switching antisense oligonucleotide (ASO) designed to induce exon 27 skipping in WRN transcripts carrying the c.3139-1G>C mutation.