Anxiolytic-like and proneurogenic effects of Trichilia catigua ethyl-acetate fraction in mice with cerebral ischemia
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Add time:08/04/2019 Source:sciencedirect.com
Trichilia catigua A. Juss., Meliaceae, known as “catuaba” in Brazil, has been popularly used as a tonic for fatigue, impotence and memory deficits. Previously, we have demonstrated that T. catigua ethyl-acetate fraction exerted antidepressive-like effects in mice. Affective-like symptoms are also well recognized outcome of cerebral ischemia in clinical and preclinical settings. Therefore, here we evaluated the effects of ethyl-acetate fraction on the emotional outcomes and its relation with hippocampal neurogenesis in ischemic mice. Male Swiss mice were subject to the bilateral common carotid occlusion during 20 min. The animals received ethyl-acetate fraction (400 mg/kg, orally) 30 min before and once per day during 7 days after reperfusion. Emotional outcomes were assessed using the open field test, elevated zero maze, and the tail suspension test. After the behavioral testing, the animals were sacrificed and their brains were processed to immunohistochemistry and Nissl staining. Ischemic mice exhibited anxiogenic-like behaviors in the elevated zero maze, hippocampal neurodegeneration and decreased hippocampal neurogenesis. The anxiogenic-like effect was counteracted by ethyl-acetate fraction administration. Furthermore, ethyl-acetate fraction restored the number of newborn neurons in the dentate gyrus of hippocampus of ischemic mice. In conclusion, T. catigua ethyl-acetate fraction promoted functional recovery and restored hippocampal neurogenesis in ischemic mice.
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