PMID- 29781786 OWN - NLM STAT- MEDLINE DCOM- 20181108 LR - 20181108 IS - 1743-1328 (Electronic) IS - 0161-6412 (Linking) VI - 40 IP - 9 DP - 2018 Sep TI - Sitagliptin rescues memory deficits in Parkinsonian rats via upregulating BDNF to prevent neuron and dendritic spine loss. PG - 736-743 LID - 10.1080/01616412.2018.1474840 [doi] AB - OBJECTIVES: Parkinson's disease (PD) is a neurodegenerative disease with high morbidity among adults worldwide that causes tremendous trouble to people's lives. The purpose of this study was to investigate the impact of sitagliptin on PD and its potential mechanism. METHODS: First, the memory of rats in each group was evaluated with the Morris water maze (MWM) test and the passive avoidance test. Then, both brain-derived neurotrophic factor (BDNF) protein and mRNA levels were detected by ELISA and qPCR assays, respectively. Then, rapid Golgi impregnation was used to observe the density of dendritic spines in the hippocampal CA1 area. Finally, k252a, an antagonist of Trk receptors, was used to block the binding of BDNF with its receptors, and the effects of sitagliptin on PD improvement were detected. RESULTS: Our study showed that sitagliptin improved memory deficits in PD rats. Meanwhile, the expression level of BDNF and tyrosine hydroxylase (TH) was upregulated, and the density of dendritic spine was increased by sitagliptin administration. Moreover, K252a administration blocked the positive effects of sitagliptin on memory in PD rats. DISCUSSION: Sitagliptin rescued the memory deficits, which was achieved by upregulating BDNF to prevent neuronal death and dendritic spine loss. Our findings indicate that sitagliptin might be a promising potential drug for PD treatment in the future. FAU - Li, Jing AU - Li J AD - a Department of Geriatrics , the Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang P.R. China. FAU - Zhang, Shuhu AU - Zhang S AD - a Department of Geriatrics , the Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang P.R. China. FAU - Li, Chenye AU - Li C AD - a Department of Geriatrics , the Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang P.R. China. FAU - Li, Mei AU - Li M AD - a Department of Geriatrics , the Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang P.R. China. FAU - Ma, Lan AU - Ma L AD - a Department of Geriatrics , the Second Affiliated Hospital of Harbin Medical University , Harbin , Heilongjiang P.R. China. LA - eng PT - Journal Article DEP - 20180521 PL - England TA - Neurol Res JT - Neurological research JID - 7905298 RN - 0 (Antiparkinson Agents) RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Carbazoles) RN - 0 (Enzyme Inhibitors) RN - 0 (Indole Alkaloids) RN - 0 (Neuroprotective Agents) RN - 0 (Nootropic Agents) RN - 97161-97-2 (staurosporine aglycone) RN - EC 1.14.16.2 (Tyrosine 3-Monooxygenase) RN - TS63EW8X6F (Sitagliptin Phosphate) SB - IM MH - Animals MH - Antiparkinson Agents/pharmacology MH - Avoidance Learning/drug effects/physiology MH - Brain-Derived Neurotrophic Factor/*metabolism MH - Carbazoles/pharmacology MH - Enzyme Inhibitors/pharmacology MH - Indole Alkaloids/pharmacology MH - Male MH - Maze Learning/drug effects/physiology MH - Memory Disorders/*drug therapy/etiology/metabolism/pathology MH - Neurons/*drug effects/metabolism/pathology MH - Neuroprotective Agents/pharmacology MH - Nootropic Agents/*pharmacology MH - Parkinsonian Disorders/*drug therapy/metabolism/pathology/psychology MH - Random Allocation MH - Rats, Wistar MH - Sitagliptin Phosphate/*pharmacology MH - Tyrosine 3-Monooxygenase/metabolism MH - Up-Regulation/drug effects OTO - NOTNLM OT - BDNF OT - Morris Water Maze OT - Parkinson's disease OT - Sitagliptin OT - dendritic spine OT - passive avoidance EDAT- 2018/05/22 06:00 MHDA- 2018/11/09 06:00 CRDT- 2018/05/22 06:00 PHST- 2018/05/22 06:00 [pubmed] PHST- 2018/11/09 06:00 [medline] PHST- 2018/05/22 06:00 [entrez] AID - 10.1080/01616412.2018.1474840 [doi] PST - ppublish SO - Neurol Res. 2018 Sep;40(9):736-743. doi: 10.1080/01616412.2018.1474840. Epub 2018 May 21.