Pathogenic variants in the AFG3L2 proteolytic domain cause SCA28 through haploinsufficiency and proteostatic stress-driven OMA1 activation.
Susanna TulliAndrea Del BondioValentina BadernaDavide MazzaFranca CodazziTyler Mark PiersonAlessandro AmbrosiDagmar NolteCyril GoizetCamilo ToroJonathan BaetsTine DeconinckPeter DeJonghePaola MandichGiorgio CasariFrancesca MalteccaPublished in: Journal of medical genetics (2019)
Our data identify the earliest events in SCA28 pathogenesis and open new perspectives for therapy. By identifying similar mitochondrial phenotypes between SCA28 cells and AFG3L2+/- cells, our results support haploinsufficiency as the mechanism for the studied pathogenic variants.