title: Resveratrol improved the spatial learning and memory in subclinical hypothyroidism rat induced by hemi-thyroid electrocauterization.
abstract: The major purpose of this study was to investigate the effect of resveratrol (RES) on the spatial learning and memory ability in subclinical hypothyroidism (SCH) rat model and the potential mechanism. A SCH rat model was induced by hemi-thyroid electrocauterization and the activity of hypothalamus-pituitary-thyroid (HPT) axis was detected. The spatial learning and memory ability was tested using Morris water maze (MWM) and Y-maze. The protein expressions of synaptotagmin-1 (syt-1) and brain-derived neurotrophic factor (BDNF) in the hippocampus were measured via western blot. The results showed that SCH rat model was successfully duplicated. The SCH rats showed impaired learning and memory in the behavioral tests. However, these changes were reversed by the treatment of RES (15mg/kg) and levothyroxine (LT4). Moreover, RES treated rats exhibited reduced plasma TSH level and hypothalamic thyrotropin releasing hormone (TRH) mRNA expression, which suggested that the imbalance of HPT axis in the SCH rats could be reversed by RES treatment. Furthermore, RES treatment up-regulated the protein levels of syt-1 and BDNF in hippocampus. These findings indicated an amelioration effect of RES on the spatial learning and memory in the SCH rats, the mechanism of which might be involved with its ability of modifying the hyperactive HPT axis and up-regulating the hippocampal hypo-expression of syt-1 and BDNF.
authors.affiliation: Anhui Key Laboratory of Bioactivity of Natural Products, School of Pharmacy, Anhui Medical University, Hefei 230032, Anhui, China.
authors.forename: Jin-Fang
authors.initials: JF
authors.lastname: Ge
authors.forename: Ya-Yun
authors.initials: YY
authors.lastname: Xu
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang
authors.forename: Guo-Liang
authors.initials: GL
authors.lastname: Qiu
authors.forename: Cheng-Hao
authors.initials: CH
authors.lastname: Chu
authors.forename: Cai-Yun
authors.initials: CY
authors.lastname: Wang
authors.forename: Gan
authors.initials: G
authors.lastname: Qin
authors.forename: Fei-Hu
authors.initials: FH
authors.lastname: Chen
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000627:therapeutic use; D058070:Asymptomatic Diseases; D001522:Behavior, Animal / Q000187:drug effects; D019208:Brain-Derived Neurotrophic Factor / Q000819:agonists / Q000378:metabolism; D004195:Disease Models, Animal; D006624:Hippocampus / Q000187:drug effects / Q000378:metabolism; D020249:Hormone Replacement Therapy; D007037:Hypothyroidism / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D007859:Learning Disabilities / Q000209:etiology / Q000517:prevention & control*; D008297:Male; D018782:Maze Learning / Q000187:drug effects; D008569:Memory Disorders / Q000209:etiology / Q000517:prevention & control*; D009419:Nerve Tissue Proteins / Q000819:agonists / Q000378:metabolism; D009474:Neurons / Q000187:drug effects / Q000378:metabolism; D018697:Nootropic Agents / Q000627:therapeutic use*; D011897:Random Allocation; D017207:Rats, Sprague-Dawley; D000077185:Resveratrol; D065853:Spatial Learning / Q000187:drug effects; D013267:Stilbenes / Q000627:therapeutic use*; D050863:Synaptotagmin I / Q000819:agonists / Q000378:metabolism; D013974:Thyroxine / Q000627:therapeutic use
chemical_list: D000975:Antioxidants; D019208:Brain-Derived Neurotrophic Factor; D009419:Nerve Tissue Proteins; D018697:Nootropic Agents; D013267:Stilbenes; D050863:Synaptotagmin I; C494312:Syt1 protein, rat; D000077185:Resveratrol; D013974:Thyroxine