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Diabetes Mellitus (DM) is a major comorbid condition that increases susceptibility to stroke. Intracerebral hemorrhage (ICH), a devastating type of stroke, accounts for only 13% of the total stroke cases but is associated with higher mortality. Multimorbid models of DM and ischemic stroke have been widely studied; however, fewer pieces of evidence are available on the impact of DM on the outcomes of ICH injury. In this study, we investigated the effect of DM on ICH-induced injury and cognitive impairments. Streptozotocin (STZ) induced type-I DM (T1DM) animal model was used, and experimental ICH was induced by intrastriatal injection of collagenase. Our results demonstrated that DM is associated with a significant increase in hematoma volume and deficits in post-stroke locomotor, sensorimotor, and cognitive behavior in mice. The levels of neuroinflammation, oxidative/nitrosative stress, and glial cell activation …