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Stimulation of Neurotrophic Factors and Inhibition of Proinflammatory Cytokines by Exogenous Application of Triiodothyronine in the Rat Model of Ischemic Stroke Publisher Pubmed



Sabbaghziarani F1 ; Mortezaee K2 ; Akbari M3 ; Kashani IR3 ; Soleimani M4, 5 ; Hassanzadeh G3 ; Zendedel A6, 7
Authors
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Authors Affiliations
  1. 1. Department of Anatomy, School of Medicine, Qazvin University of Medical Sciences, Qazvin, Iran
  2. 2. Department of Anatomy, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
  3. 3. Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
  5. 5. Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
  6. 6. Institute of Neuroanatomy, RWTH Aachen University, Aachen, Germany
  7. 7. Department of Anatomical Sciences, Faculty of Medicine, Giulan University of Medical Sciences, Rasht, Iran

Source: Cell Biochemistry and Function Published:2017


Abstract

There is a positive relation between decreases of triiodothyronine (T3) amounts and severity of stroke. The aim of this study was to evaluate the effect of exogenous T3 application on levels of neurogenesis markers in the subventricular zone. Cerebral ischemia was induced by middle cerebral artery occlusion in male Wistar rats. There were 4 experimental groups: sham, ischemic, vehicle, and treatment. Rats were injected with T3 (25 μg/kg, IV injection) at 24 hours after ischemia. Animals were sacrificed at day 7 after ischemia. There were high levels of brain-derived neurotrophic factor, nestin, and Sox2 expressions in gene and protein levels in the T3 treatment group (P ≤.05 vs ischemic group). Treatment group showed high levels of sera T3 and thyroxine (T4) but low levels of thyrotropin (TSH), tumor necrosis factor-α, and interleukin-6 (P ≤.05 vs ischemic group) at day 4 after ischemia induction. Findings of this study revealed the effectiveness of exogenous T3 application in the improvement of neurogenesis possibly via regulation of proinflammatory cytokines. Copyright © 2017 John Wiley & Sons, Ltd.