PMID- 30564080 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200929 IS - 1611-2156 (Print) IS - 1611-2156 (Electronic) IS - 1611-2156 (Linking) VI - 17 DP - 2018 TI - Everolimus, a mammalian target of rapamycin inhibitor, ameliorated streptozotocin-induced learning and memory deficits via neurochemical alterations in male rats. PG - 999-1017 LID - 10.17179/excli2018-1626 [doi] AB - Everolimus (EVR), as a rapamycin analog, is a selective inhibitor of the mammalian target of rapamycin (mTOR) kinase and its associated signaling pathway. mTOR is a serine/threonine protein kinase and its hyperactivity is involved in the pathophysiology of Alzheimer's disease (AD) and associated cognitive deficits. The present study evaluated the impact of EVR, on cognitive functions, hippocampal cell loss, and neurochemical parameters in the intracerebroventricular streptozotocin (icv-STZ) model of AD rats. EVR (1 and 5 mg/kg) was administered for 21 days following the single administration of STZ (3 mg/kg, icv) or for 7 days on days 21-28 post-STZ injection after establishment of cognitive dysfunction. Cognitive deficits (passive avoidance and spatial memory), oxidative stress parameters, acetylcholinesterase (AChE) activity, and percentage of cell loss were evaluated in the hippocampus. Chronic administration (1 and 5 mg/kg for 21 days from the day of surgery and icv-STZ infusion) or acute injection (5 mg/kg for 7 days after establishment of cognitive impairment) of EVR significantly attenuated cognitive dysfunction, neuronal loss, oxidative stress and AChE activity in the hippocampus of STZ-AD rats. In conclusion, our study showed that EVR could prevent or improve deteriorations in behavioral, biochemical and histopathological features of the icv-STZ rat model of AD. Therefore, inhibition of the hyperactivated mTOR may be an important therapeutic target for AD. FAU - Fanoudi, Sahar AU - Fanoudi S AD - Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. AD - Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran. FAU - Hosseini, Mahmoud AU - Hosseini M AD - Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. FAU - Alavi, Mohaddeseh Sadat AU - Alavi MS AD - Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. AD - Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran. FAU - Boroushaki, Mohammad Taher AU - Boroushaki MT AD - Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. AD - Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran. FAU - Hosseini, Azar AU - Hosseini A AD - Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran. FAU - Sadeghnia, Hamid R AU - Sadeghnia HR AD - Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. AD - Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran. AD - Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. LA - eng PT - Journal Article DEP - 20181029 PL - Germany TA - EXCLI J JT - EXCLI journal JID - 101299402 PMC - PMC6295637 OTO - NOTNLM OT - Alzheimer's disease (AD) OT - acetylcholinesterase OT - everolimus OT - mTOR OT - oxidative stress OT - streptozotocin EDAT- 2018/12/20 06:00 MHDA- 2018/12/20 06:01 PMCR- 2018/10/29 CRDT- 2018/12/20 06:00 PHST- 2018/08/16 00:00 [received] PHST- 2018/10/05 00:00 [accepted] PHST- 2018/12/20 06:00 [entrez] PHST- 2018/12/20 06:00 [pubmed] PHST- 2018/12/20 06:01 [medline] PHST- 2018/10/29 00:00 [pmc-release] AID - 2018-1626 [pii] AID - Doc999 [pii] AID - 10.17179/excli2018-1626 [doi] PST - epublish SO - EXCLI J. 2018 Oct 29;17:999-1017. doi: 10.17179/excli2018-1626. eCollection 2018.