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https://www.readbyqxmd.com/read/29241675/effect-of-telmisartan-on-preventing-learning-and-memory-deficits-via-peroxisome-proliferator-activated-receptor-%C3%AE-in-vascular-dementia-spontaneously-hypertensive-rats
#1
Yuan Gao, Wei Li, Yali Liu, Yan Wang, Jianchao Zhang, Miao Li, Mengsen Bu
BACKGROUND: This study aimed to explore the effect of telmisartan (TEL), as a partial peroxisome proliferator-activated receptor-γ (PPAR-γ) agonist, in vascular dementia (VaD) rats induced by middle cerebral artery occlusion (MCAO). METHODS: Spontaneously hypertensive rats were divided into 6 groups: the sham group, model group, TEL-treated groups (1, 5, and 10 mg/kg), and TEL + GW9662 (10 mg/kg + 1 mg/kg). Using the MCAO method established the VaD rat model...
December 11, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29241126/the-chronic-exposure-to-abamectin-causes-spatial-memory-deficit-and-depressive-behavior-in-mice
#2
Wellington Alves Mizael da Silva, Abraão Tiago Batista Guimarães, Mateus Flores Montalvão, Bruna de Oliveira Mendes, Aline Sueli de Lima Rodrigues, Guilherme Malafaia
It is known that abamectin (ABA), which is a component belonging to the group of avermectins, has been broadly used as biopesticide. Although its effect on non-target aquatic organisms is known, knowledge about its impacts on terrestrial animals such as mammals remains incipient. Thus, we aim at investigating the effects (phycical and neural-behavioral) from the chronic exposure (90 days) to ABA (1/10 of LD50) on Swiss and C57Bl/6J mice from both sexes. Accordingly, at the end of the experimental period the animals were subjected to the following tests: Novel Object Recognition Test (NORT), Morris Water Maze (MWM), Tail Suspension Test (TST), and Forced Swimming Test (FST)...
December 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29238473/the-effects-of-cck-8s-on-spatial-memory-and-long-term-potentiation-at-ca1-during-induction-of-stress-in-rats
#3
Malihe Sadeghi, Parham Reisi, Maryam Radahmadi
Objectives: Cholecystokinin (CCK) has been proposed as a mediator in stress. However, it is still not fully documented what are its effects. We aimed to evaluate the effects of systemic administration of CCK exactly before induction of stress on spatial memory and synaptic plasticity at CA1 in rats. Materials and Methods: Male Wistar rats were divided into 4 groups: the control, the control-CCK, the stress and the stress-CCK. Restraint stress was induced 6 hr per day, for 24 days...
December 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29238302/sevoflurane-induces-exaggerated-and-persistent-cognitive-decline-in-a-type-ii-diabetic-rat-model-by-aggregating-hippocampal-inflammation
#4
Dongliang Li, Lingling Liu, Liang Li, Xingang Li, Bin Huang, Changqing Zhou, Zhaohang Zhang, Chunling Wang, Ping Dong, Xiyan Zhang, Bo Yang, Li Zhang
Recent studies show that a moderate duration of sevoflurane, one of the most commonly used volatile anesthetics in clinical practice, does not induce cognitive impairment in animals under physiological conditions. However, the influence of sevoflurane on cognitive function under diabetic conditions remains unclear. The aim of this study was to determine whether sevoflurane causes cognitive decline in a rat model of type 2 diabetes mellitus (DM) and if so, to explore a possible underlying mechanism. Diabetic Goto-Kakizaki (GK) rats and non-diabetic Wistar rats underwent 2...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29237528/-effect-of-leptin-on-long-term-spatial-memory-of-rats-with-white-matter-damage-in-developing-brain
#5
Er-Cui Feng, Li Jiang
OBJECTIVE: To investigate the neuroprotective effect of leptin by observing its effect on spatial memory of rats with white matter damage in developing brain. METHODS: A total of 80 neonatal rats were randomly divided into 3 groups: sham-operation (n=27), model (n=27) and leptin intervention (n=27). The rats in the model and leptin intervention groups were used to prepare a model of white matter damage in developing brain, and the rats in the leptin intervention group were given leptin (100 μg/kg) diluted with normal saline immediately after modelling for 4 consecutive days...
December 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29234406/amelioration-of-scopolamine-induced-learning-and-memory-impairment-by-%C3%AE-pinene-in-c57bl-6-mice
#6
Gil-Yong Lee, Chan Lee, Gyu Hwan Park, Jung-Hee Jang
Increasing evidence suggests that neurodegenerative disorders such as Alzheimer's disease (AD) are mediated via disruption of cholinergic neurons and enhanced oxidative stress. Therefore, attention has been focused on searching for antioxidant phytochemicals for the prevention and/or treatment of AD through their ability to fortify cholinergic function and antioxidant defense capacity. In this study, we have investigated the neuroprotective effect of α-pinene (APN) against learning and memory impairment induced by scopolamine (SCO, 1 mg/kg, i...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29234402/extract-of-fructus-cannabis-ameliorates-learning-and-memory-impairment-induced-by-d-galactose-in-an-aging-rats-model
#7
Ning-Yuan Chen, Cheng-Wu Liu, Wei Lin, Yi Ding, Zhang-Ya Bian, Ling Huang, Hao Huang, Kai-Hui Yu, Si-Bang Chen, Yu Sun, Lei Wei, Jun-Hua Peng, Shang-Ling Pan
Hempseed (Cannabis sativa L.) has been used as a health food and folk medicine in China for centuries. In the present study, we sought to define the underlying mechanism by which the extract of Fructus Cannabis (EFC) protects against memory impairment induced by D-galactose in rats. To accelerate aging and induce memory impairment in rats, D-galactose (400 mg/kg) was injected intraperitoneally once daily for 14 weeks. EFC (200 and 400 mg/kg) was simultaneously administered intragastrically once daily in an attempt to slow the aging process...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29233001/arachidonic-acid-attenuates-brain-damage-in-a-rat-model-of-ischemia-reperfusion-by-inhibiting-inflammatory-response-and-oxidative-stress
#8
Y Qu, H-L Zhang, X-P Zhang, H-L Jiang
The aim of the present study was to study the effects of arachidonic acid (ARA) in a rat brain ischemia/reperfusion model induced by middle cerebral artery occlusion (MCAO). A total of 50 rats were randomly divided into five groups: control group, MCAO group, MCAO + ARA 0.3 g/kg group, MCAO + ARA 1 g/kg group, and MCAO + ARA 3 g/kg group. The MCAO + ARA groups received ARA by intraperitoneal injection daily for 14 consecutive days, while the rats in the control and MCAO groups were given equivalent volume of saline...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29231506/-effects-and-mechanisms-of-different-frequencies-of-electroacupuncture-for-learning-and-memory-ability-of-alzheimer-s-rats
#9
Ying Wang, Lihong Kong, Wei Li, Kangkang Zhang, Feng Shen, Yawen Wang, Hua Zhou, Guojie Sun
OBJECTIVE: To observe the effects of different frequencies of electroacupuncture (EA) at "Baihui (GV 20)" and "Shenshu(BL 23)" for the learning and memory ability as well as glycogen synthase kinase-3β (GSK-3β) and growth associated protein-43 (GAP-43) in hippocampal tissue of rats with Alzheimer's disease(AD), so as to explore the mechanism of different frequencies of EA for the prevention and treatment of AD. METHODS: One hundred and twelve healthy Wistar male rats were divided into seven groups by random number table, namely a normal group, a sham operation group, a model group, an acupuncture group, a 2 Hz EA group, a 30 Hz EA group, and a 50 Hz EA group, 16 rats in each one...
June 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29230855/a-role-for-autophagy-in-long-term-spatial-memory-formation-in-male-rodents
#10
Michael J Hylin, Jing Zhao, Karthikeyan Tangavelou, Natalia S Rozas, Kimberly N Hood, Jacalyn S MacGowan, Anthony N Moore, Pramod K Dash
A hallmark of long-term memory formation is the requirement for protein synthesis. Administration of protein synthesis inhibitors impairs long-term memory formation without influencing short-term memory. Rapamycin is a specific inhibitor of target of rapamycin complex 1 (TORC1) that has been shown to block protein synthesis and impair long-term memory. In addition to regulating protein synthesis, TORC1 also phosphorylates Unc-51-like autophagy activating kinase-1 (Ulk-1) to suppress autophagy. As autophagy can be activated by rapamycin (and rapamycin inhibits long-term memory), our aim was to test the hypothesis that autophagy inhibitors would enhance long-term memory...
December 12, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29230184/neuroligin-2-r215h-mutant-mice-manifest-anxiety-increased-prepulse-inhibition-and-impaired-spatial-learning-and-memory
#11
Chia-Hsiang Chen, Pin-Wei Lee, Hsiao-Mei Liao, Pi-Kai Chang
Neuroligin 2 (NLGN2) is a postsynaptic adhesion protein that plays an essential role in synaptogenesis and function of inhibitory neuron. We previously identified a missense mutation R215H of the NLGN2 in a patient with schizophrenia. This missense mutation was shown to be pathogenic in several cell-based assays. The objective of this study was to better understand the behavioral consequences of this mutation in vivo. We generated a line of transgenic mice carrying this mutation using a recombinant-based method...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29229546/changes-in-cognition-and-dendritic-complexity-following-intrathecal-methotrexate-and-cytarabine-treatment-in-a-juvenile-murine-model
#12
Tyler C Alexander, Christy M Simecka, Frederico Kiffer, Thomas Groves, Julie Anderson, Hannah Carr, Jing Wang, Gwendolyn Carter, Antiño R Allen
Acute lymphoblastic leukemia (ALL) is the most prevalent childhood cancer and accounts for 26.8% of cancer diagnoses among children, worldwide-approximately 3,000 children each year. While advancements in treating ALL have led to a remission rate of more than 90%, many survivors experience adverse neurocognitive and/or neurobehavioral effects as a result of intrathecal chemotherapy. Methotrexate (MTX) is commonly administered with cytosine arabinoside (AraC, cytarabine) during intrathecal chemotherapy for ALL...
December 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29229533/xanthoceraside-attenuates-amyloid-%C3%AE-peptide1-42-induced-memory-impairments-by-reducing-neuroinflammatory-responses-in-mice
#13
Yue Qi, Xue-Fei Ji, Tian-Yan Chi, Peng Liu, Ge Jin, Qian Xu, Qing Jiao, Li-Hua Wang, Li-Bo Zou
Xanthoceraside, a novel triterpenoid saponin extracted from the husks of Xanthoceras sorbifolia Bunge, has neuroprotective effects in vivo and anti-inflammatory properties in vitro. However, the exact mechanism of xanthoceraside on anti-amyloid beta (Aβ)-induced neuroinflammatory responses has not been elucidated. Therefore, we used intracerebroventricular injection of amyloid 1-42 (Aβ1-42) to establish a mouse model to test the effects of xanthoceraside on Aβ-induced cognitive impairments and the TLR2/NF-κB and MAPK pathways...
December 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29228731/impact-of-anger-emotional-stress-before-pregnancy-on-adult-male-offspring
#14
Sheng Wei, Xinyang Xiao, Jieqiong Wang, Shiguang Sun, Zifa Li, Kaiyong Xu, Fang Li, Jie Gao, Dehao Zhu, Mingqi Qiao
Previous studies have reported that maternal chronic stress or depression is linked to an increased risk of affective disorders in progeny. However, the impact of maternal chronic stress before pregnancy on the progeny of animal models is unknown. We investigated the behaviors and the neurobiology of 60-day-old male offspring of female rats subjected to 21 days of resident-intruder stress before pregnancy. An anger stressed parental rat model was established using the resident-intruder paradigm and it was evaluated using behavioral tests...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228667/metformin-ameliorates-sepsis-induced-brain-injury-by-inhibiting-apoptosis-oxidative-stress-and-neuroinflammation-via-the-pi3k-akt-signaling-pathway
#15
Guangming Tang, Huiyun Yang, Jing Chen, Mengrao Shi, Lingqing Ge, Xuhua Ge, Guoji Zhu
Sepsis-induced brain injuries increase mortality, morbidity, cognitive impairment and lack of effective therapeutic treatment. Previous studies have suggested that metformin provides neuroprotective effects against ischemia, brain trauma and other brain damage, but whether metformin protects a septic brain remains unknown. Thus, the aim of this study is to investigate the possible effects and the mechanism of metformin against septic brain damage using the cecal ligation and puncture (CLP) model. Mice were randomly divided into five groups: the Sham group, CLP group, CLP+ Met group, CLP+ vehicle group and CLP+ Met+ LY group...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29222348/insulin-degrading-enzyme-contributes-to-the-pathology-in-a-mixed-model-of-type-2-diabetes-and-alzheimer-s-disease
#16
Huajie Li, Jian Wu, Linfeng Zhu, Luolin Sha, Song Yang, Jiang Wei, Lei Ji, Xiaochun Tang, Keshi Mao, Liping Cao, Ning Wei, Wei Xie, Zhilong Yang
Insulin degrading enzyme (IDE) is believed to act as a junction point of type 2 diabetes (T2D) and Alzheimer's disease (AD), however, the underlying mechanism was not completely clear yet. Transgenic APPSwe/PS1 mice were used as the AD model and were treated with streptozocin/streptozotocin (STZ) to develop a mixed mice model presenting both AD and T2D. Morris Water Maze (MWM) and recognition task were performed to trace the cognitive function. The detection of fasting plasma glucose (FPG) and plasma insulin concentration, and Oral Glucose Tolerance Test (OGTT) were used to trace the metabolism evolution...
December 8, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29221166/high-salt-induced-hypertension-leads-to-cognitive-defect
#17
Cui-Ping Guo, Zhen Wei, Fang Huang, Min Qin, Xing Li, Yu-Man Wang, Qun Wang, Jian-Zhi Wang, Rong Liu, Bin Zhang, Hong-Lian Li, Xiao-Chuan Wang
Although increasing evidences suggest a relationship between hypertension and brain function for years, it is still unclear whether hypertension constitutes a risk factor for cognitive decline and its underlying mechanism. In the present study, an experimental animal model of hypertension simply by feeding rats with high salt diet was employed. We found that long-term high salt intake caused a marked increase of systolic blood pressure linked to a declined regional cerebral blood flow. Fear conditioning and morris water maze behavioral test revealed that high salt diet induced hippocampal dependent spatial reference memory deficits, while a decreased synaptogenesis without neuronal loss in hippocampus was observed in high salt treated rats...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29220865/silver-nano-particles-ameliorate-learning-and-spatial-memory-of-male-wistar-rats-by-prevention-of-amyloid-fibril-induced-neurotoxicity
#18
H Ramshini, A-S Moghaddasi, L-S Aldaghi, N Mollania, A Ebrahim-Habibi
Alzheimer's disease (AD) is a chronic degenerative disease characterized by the presence of amyloid plaques and neurofibrillary tangles (NFTs), which results into memory and learning impairments. In the present study, we showed that the aggregates formed by a protein that has no link with Alzheimer's disease, namely the hen egg white lysozyme (HEWL), were cytotoxic and decreased spatial learning and memory in rats. The effect of Ag-nano particles (Ag-NPs) was investigated on disruption of amyloid aggregation and preservation of cognitive behavior of rats...
December 8, 2017: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/29218419/an-unexpected-improvement-in-spatial-learning-and-memory-ability-in-alpha-synuclein-a53t-transgenic-mice
#19
Qi Liu, YuYu Xu, WenPing Wan, ZeGang Ma
Growing evidence suggests, as Parkinson's disease (PD) progresses, that its non-motor symptoms appear prior to or in parallel with its motor deficits. Alpha-synuclein A53T transgenic mouse (A53T) is an essential tool to investigate the onsets and the extents of PD non-motor symptoms. Our aim is to investigate spatial learning and memory ability in A53T mice. In our rotarod tests, no motor coordination impairments were detected in mice of 3, 6, 9, and 12 months old. We then investigated their spatial learning and memory ability through Morris water maze in 3- and 9-month-old mice...
December 7, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29218095/effect-of-repeated-neonatal-sevoflurane-exposure-on-the-learning-memory-and-synaptic-plasticity-at-juvenile-and-adult-age
#20
Xiaoli Liang, Yi Zhang, Chao Zhang, Chunchun Tang, Yi Wang, Juanjuan Ren, Xi Chen, Yu Zhang, Zhaoqiong Zhu
Currently sevoflurane is the volatile anesthetic most wildly used in pediatric surgery. Whether neonatal exposure to sevoflurane brings about a long-lasting adverse impact even at juvenile and adult age, attracts extensive concerns. However, to date the consensus has not been reached and how exposure to sevoflurane in early life affects long-term ability of learning and memory is not fully elucidated. To obtain further insight into this issue, 32 neonatal SD rats were assigned into control group (group C, n=16) and sevoflurane group (group SEV, n=16)...
2017: American Journal of Translational Research
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