PMID- 28124751 OWN - NLM STAT- MEDLINE DCOM- 20180302 LR - 20210109 IS - 1573-7365 (Electronic) IS - 0885-7490 (Linking) VI - 32 IP - 3 DP - 2017 Jun TI - Peripheral and central administration of T3 improved the histological changes, memory and the dentate gyrus electrophysiological activity in an animal model of Alzheimer's disease. PG - 693-701 LID - 10.1007/s11011-016-9947-2 [doi] AB - The amyloid beta (Abeta) induced Alzheimer's disease (AD) is associated with formation the amyloid plaques, cognitive impairments and decline in spontaneous discharge of neurons. In the current study, we evaluated the effect of subcutaneous (S. C) and intrahippocampal (I. H) administrations of triiodothyronine (T3) on the histological changes, memory and the dentate gyrus (DG) electrophysiological activity in an animal model of AD. Eighty adult male Wistar rats (250-300 g) were divided randomly into five groups: Sham-Operated (Sh-O), AD + Vehicle (S. C), AD + Vehicle (I. H), AD+ T3 (S. C) and AD + T3 (I. H). In order to induce animal model of AD, Abeta (10 ng/mul, bilaterally) were injected intrahippocampally. Rats were treated with T3 and/or normal saline for 10 days. Passive avoidance and spatial memory were evaluated in shuttle box apparatus and Morris water maze, respectively. Neuronal single unit recording was assessed from hippocampal DG. The percent of total time that animals spent in target quarter, the mean latency time (sec), the step through latency and the average number of spikes/bin were decreased significantly in AD rats compared with the Sh-O group (p < 0.001) and were increased significantly in AD groups that have received T3 (S. C and I. H) in compared with AD group (p < 0.01, p < 0.001). Also, formation of amyloid plaques was decreased in AD rats treated with T3.The results showed that T3 injection (S. C and I. H), by reduction of neural damage and increment of neuronal spontaneous activity improved the memory deficits in Abeta-induced AD rats. FAU - Farbood, Yaghoob AU - Farbood Y AD - Physiology Research Center, Department of Physiology, Medical School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. farbood_y@yahoo.com. FAU - Shabani, Sahreh AU - Shabani S AD - Physiology Research Center, Department of Physiology, Medical School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. sahreshabani1@gmail.com. FAU - Sarkaki, Alireza AU - Sarkaki A AD - Physiology Research Center, Department of Physiology, Medical School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. FAU - Mard, Seyyed Ali AU - Mard SA AD - Physiology Research Center, Department of Physiology, Medical School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. FAU - Ahangarpour, Akram AU - Ahangarpour A AD - Physiology Research Center, Department of Physiology, Medical School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. FAU - Khorsandi, Layasadat AU - Khorsandi L AD - Cellular and Molecular Research Center, Department of Anatomical Sciences, Medical School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170126 PL - United States TA - Metab Brain Dis JT - Metabolic brain disease JID - 8610370 RN - 06LU7C9H1V (Triiodothyronine) SB - IM MH - Action Potentials/drug effects/physiology MH - Alzheimer Disease/drug therapy/*pathology/physiopathology MH - Animals MH - Dentate Gyrus/*drug effects/*pathology/physiology MH - *Disease Models, Animal MH - Injections, Intraventricular MH - Male MH - Microinjections/methods MH - Rats MH - Rats, Wistar MH - Spatial Memory/*drug effects/physiology MH - Triiodothyronine/*administration & dosage OTO - NOTNLM OT - Alzheimer's disease OT - Memory OT - Single-unit recording OT - Triiodothyronine EDAT- 2017/01/27 06:00 MHDA- 2018/03/03 06:00 CRDT- 2017/01/27 06:00 PHST- 2016/07/18 00:00 [received] PHST- 2016/12/30 00:00 [accepted] PHST- 2017/01/27 06:00 [pubmed] PHST- 2018/03/03 06:00 [medline] PHST- 2017/01/27 06:00 [entrez] AID - 10.1007/s11011-016-9947-2 [pii] AID - 10.1007/s11011-016-9947-2 [doi] PST - ppublish SO - Metab Brain Dis. 2017 Jun;32(3):693-701. doi: 10.1007/s11011-016-9947-2. Epub 2017 Jan 26.