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Curcumin Prevents Brain Damage and Cognitive Dysfunction During Ischemic-reperfusion Through the Regulation of miR-7-5p

[ Vol. 16 , Issue. 5 ]

Author(s):

Hui Xu, Beibei Nie, Lamei Liu, Chunhui Zhang*, Zhenxiang Zhang, Mengya Xu and Yongxia Mei   Pages 441 - 454 ( 14 )

Abstract:


Objective: This study was to investigate the potential protective effects of curcumin in cerebral ischemia-reperfusion (CIR) and its regulation of miR-7.

Methods: Rats were occluded by middle cerebral artery occlusion (MCAO) for 1.5 h and reperfused for 2 h to establish a local CIR model. After 24 hours of model establishment, MCAO rats were given curcumin for 3 days by intragastric administration. PC12 cells were cultured for 6 h in oxygen-glucose deprivation medium and then reoxygenated for 24 h to establish an oxygenglucose deprivation/reoxygenation (OGD/R) model. The OGD/R model cells were treated with curcumin for 48 h.

Results: Curcumin inhibited the decrease of miR-7-5p expression and an increase of RelA p65 expression induced by CIR and ODG/R. RelA p65 was a target of miR-7-5p. MiR-7-5p antagonists were able to counteract the effect of curcumin on the expression of RelA p65 in ischemic brain tissue of MCAO rats and OGD/R model cells. Curcumin improved OGD/R-induced inhibition of cell activity, necrosis and apoptosis. Curcumin significantly reduced the levels of tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-1β, reactive oxygen species (ROS) and malondialdehyde (MDA) and increased the activity of superoxide dismutases (SOD) and catalase (CAT) in OGD/R-induced cells. Curcumin may inhibit OGD/R-induced cell damage by regulating miR-7-5p. Curcumin improved cerebral infarction, nerve damage and cognitive dysfunction in rats with CIR, which may be related to the regulation of miR-7-5p/RelA p65 axis.

Conclusion: Curcumin exerts cerebral protection by attenuating cell necrosis and apoptosis, inflammatory response and oxidative stress following CIR, which may be related to its regulation of the miR-7/RELA p65 axis.

Keywords:

Cerebral ischemia-reperfusion, oxygen-glucose deprivation/reoxygenation model, curcumin, miR-7-5p/RelA p65 axis, middle cerebral artery occlusion, tumor necrosis factor.

Affiliation:

Department of Fundamental Nursing, The Nursing & Health College of Zhengzhou University, Zhengzhou City, 450001, Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou City, 450000, Department of Clinical Nursing, The Nursing & Health College of Zhengzhou University, Zhengzhou City, 450001, Department of Clinical Nursing, The Nursing & Health College of Zhengzhou University, Zhengzhou City, 450001, Department of Fundamental Nursing, The Nursing & Health College of Zhengzhou University, Zhengzhou City, 450001, Department of Neurology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou City, 450000, Department of Public Nursing, The Nursing & Health College of Zhengzhou University, Zhengzhou City, 450001



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