Establishing induced pluripotent stem cell lines from two dominant optic atrophy patients with distinct mutations and clinical pathologies.

Dominant optic atrophy (DOA) is an inherited disease that leads to the loss of retinal ganglion cells (RGCs), the projection neurons that relay visual information from the retina to the brain through the optic nerve. The majority of DOA cases can be attributed to mutations in (), a nuclear gene encoding a mitochondrial-targeted protein that plays important roles in maintaining mitochondrial structure, dynamics, and bioenergetics. Although is ubiquitously expressed in all human tissues, RGCs appear to be the primary cell type affected by mutations. DOA has not been extensively studied in human RGCs due to the general unavailability of retinal tissues. However, recent advances in stem cell biology have made it possible to produce human RGCs from pluripotent stem cells (PSCs). To aid in establishing DOA disease models based on human PSC-derived RGCs, we have generated iPSC lines from two DOA patients who carry distinct mutations and present very different disease symptoms. Studies using these mutant RGCs can be correlated with clinical features in the patients to provide insights into DOA disease mechanisms.