DCX and autosomal dominant cerebellar ataxia: In all the investigated groups of animals, control, SCA, and SCA + HBO, almost the same number of DCX-positive cells co-expressed Ki67 (42.2%, 45.2%, and 46.7%, respectively), being the largest in the HBOT group, where around half of all DCX-positive cells were proliferating immature neurons (Ki67+/DCX+).