A class of deep intronic IGHMBP2 variants activate a shared cryptic splice donor, enabling correction of select variants with a single antisense oligonucleotide
Sarah Silverstein, Andrew D. Nguyen, Rotem Orbach, Sandra C. Donkervoort, Thomas A. Cassini, Mary E. Koziura, Véronique Bolduc, Audrey M. Winkelsas, Ester Masati, Shreya Nandi, George G. Harmison, BE Johnson, Kory Johnson, Sarah E. Kargbo-Hill, Jason J. Bussgang, , Christopher Grunseich
This study identifies deep intronic IGHMBP2 variants causing SMARD1 and CMT2S, showing they activate a shared cryptic splice donor, enabling correction with a single antisense oligonucleotide in patient-derived motor neurons.
medRxiv · Apr 29, 2026 · PreprintGenetic & Genomic Medicine