TY - JOUR TT - Gender-Dependent Differences on Spatial Learning Performance in Hypothyroid Rats AU - Babur, Ercan AU - Tan, Burak AU - Yıldız, Nesrin AU - Batakçı, Melek AU - Süer, Cem AU - Dursun, Nurcan PY - 2017 DA - December JF - Sağlık Bilimleri Dergisi PB - Erciyes Üniversitesi WT - DergiPark SN - 1018-3655 SP - 233 EP - 239 VL - 26 IS - 3 KW - Hipotiroidizm KW - Sıçan KW - Öğrenme KW - Bellek KW - Morris Su Tankı N2 - The aim of the study was to investigate the effects of experimental hypothyroidism (HT) on spatial learning and memory disorders to establish relationship with gender. Propylthiouracil (PTU) was used to induce HT (0.2 mg / kg, 21 days with drinking water). Morris Water Tank test (MWTT) was used to evaluate learning and memory changes. When the anxiety level was expressed as the rate of tigmotaxis in the MWVT, it was found that the HT group was less anxious than the control group and there was no significant difference between the Group*Sex interaction. The swimming speed (SS) of female groups was found to be slower than the male groups. In evaluating the learning performance, the mean distance to platform (MdtoP), distance movement (DM) and escape latency (EL) was evaluated. During EL and DM assessment, the HT state prolonged the time to find the platform and increased swimming distance. However, the gender factor did not affect the deterioration of the HT state. Evaluating the MdtoP, which is not affected by SS, the learning performance in female was significantly reduced (p<0,001) and the HT state did not affect this decrease. In addition, hypothyroid status alone increased the mean distance to platform. According to the Post Hoc Tukey test, HT groups were realized that it spent less time than the control groups in target quadrant (p<0,05). However, the gender factor did not affect this significance. As a result, we found that the animals with hypothyroidism had poor learning and memory performance, and gender difference did not affect this deterioration in hypothyroidism. CR - 1. Eichenbaum H. Hippocampus: cognitive processes and neural representations that underlie declarative memory. Neuron 2004; 44:109-120. CR - 2. Squire LR, Zola SM. Structure and function of declarative and nondeclarative memory systems. Proceedings of the National Academy of Sciences 1996; 93:13515-13522. CR - 3. Kesner RP, Hopkins RO. Mnemonic functions of the hippocampus: a comparison between animals and humans. Biological Psychology 2006; 73:3-18. CR - 4. Olton DS, Paras BC. Spatial memory and hippocampal function. Neuropsychologia 1979; 17:669-682. CR - 5. Arthur C.Guyton JEH. Textbook of Medical Physiology (eleventh edition ed). 2016; pp 934- 939 . CR - 6. Davis PJ, Davis FB, Cody V. Membrane receptors mediating thyroid hormone action. Trends in Endocrinology & Metabolism 2005; 16:429-435. CR - 7. Davis PJ, Shih A, Lin H-Y, Martino LJ, Davis FB. Thyroxine promotes association of mitogenactivated protein kinase and nuclear thyroid hormone receptor (TR) and causes serine phosphorylation of TR. Journal of Biological Chemistry 2000; 275:38032-38039. CR - 8. Warren SG, Juraska JM. Spatial and nonspatial learning across the rat estrous cycle. Behavioral Neuroscience 1997; 111:259. CR - 9. Berry B, McMahan R, Gallagher M. Spatial learning and memory at defined points of the estrous cycle: effects on performance of a hippocampaldependent task. Behavioral Neuroscience 1997; 111:267. CR - 10. Tong H, Chen G-H, Liu R-Y, Zhou J-N. Age-related learning and memory impairments in adult-onset hypothyroidism in Kunming mice. Physiology & Behavior 2007; 91:290-298. CR - 11. Figueiredo B, Almazan G, Ma Y, Tetzlaff W, Miller F, Cuello A. Gene expression in the developing cerebellum during perinatal hypo-and hyperthyroidism. Molecular Brain Research 1993; 17:258-268. CR - 12. Patel AJ, Hayashi M, Hunt A. Selective persistent reduction in choline acetyltransferase activity in basal forebrain of the rat after thyroid deficiency during early life. Brain Research 1987; 422:182- 185. CR - 13. Ji C, Shao J, Zhao Z, Huang X, Mao S. Expression of androgen receptor gene in cerebral cortex and hippocampus of rats with perinatal hypothyroidism. Zhejiang da xue xue bao Yi xue ban= Journal of Zhejiang University Medical Sciences 2005; 34:293-297. CR - 14. Morris R, Schenk F, Tweedie F, Jarrard L. Ibotenate lesions of hippocampus and/or subiculum: dissociating components of allocentric spatial learning. European Journal of Neuroscience 1990; 2:1016-1028. CR - 15. Epp JR, Chow C, Galea LA. Hippocampus-dependent learning influences hippocampal neurogenesis. Frontiers In Neuroscience 2013; 7. CR - 16. Abd Allah E, Gomaa A, Sayed M. The effect of omega -3 on cognition in hypothyroid adult male rats. Acta Physiologica Hungarica 2014; 101:362-376. UR - https://dergipark.org.tr/tr/pub/eujhs/article/553094 L1 - https://dergipark.org.tr/tr/download/article-file/693931 ER -