“…The urothelium had detached from the underlying mucosa, and the discontinuities of the apical plasma membranes indicated the urothelium was undergoing cell death . In another study of diabetic rats, Li et al showed that urothelial cell apoptosis was involved in diabetic cystopathy via activation of poly (ADP‐ribose) polymerase, c‐Jun N‐terminal kinase, and the mitochondrial apoptotic pathway . In this study, OAB patients, regardless of DM, had significant disruption of urothelial barrier function, which could result in the migration of noxious urinary substances into the underlying tissue causing suburothelial inflammation.…”