Tamoxifen promotes white matter recovery and cognitive functions in male mice after chronic hypoperfusion

Publication date: Available online 5 October 2019Source: Neurochemistry InternationalAuthor(s): Yuxue Chen, Yeye Tian, Hao Tian, Qibo Huang, Yongkang Fang, Wei Wang, Yue Wan, Dengji Pan, Minjie XieAbstractCerebral white matter lesions (WMLs) induced by chronic cerebral hypoperfusion are one of the major components of stroke pathology and closely associated with cognitive impairment. However, the repair and related pathophysiology of white matter after brain injury remains relatively elusive and underexplored. Successful neuroregeneration is a method for the potential treatment of CNS disorders. A non-steroidal estrogen receptor modulator, Tamoxifen, is an effective inhibitor of cell-swelling-activated anion channels and can mimic neuroprotective effects of estrogen in experimental ischemic stroke. However, its remains unclear whether Tamoxifen has beneficial effects in the pathological process after WMLs. In the present study, we investigated the efficacy of Tamoxifen on multiple elements of neurovascular unit of the male C57BL/6 mice brain after bilateral carotid artery stenosis (BCAS) - induced WMLs. Tamoxifen was injected intraperitoneally once daily from 1 day after BCAS until 1 day before sacrificed. Following chronic hypoperfusion, BCAS mice presented white matter demyelination, loss of axon-glia integrity, activated inflammatory response, and cognitive impairments. Tamoxifen treatment significantly facilitated functional restoration of working memory impairment in mice...
Source: Neurochemistry International - Category: Neuroscience Source Type: research