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https://www.readbyqxmd.com/read/28917975/the-memory-ameliorating-effects-of-dhp1402-an-herbal-mixture-on-cholinergic-blockade-induced-cognitive-dysfunction-in-mice
#1
Haneul Kim, Hyung Eun Lee, In Ho Jung, Se Jin Jeon, Jiabao Zhang, Yubeen Kwon, Dae Sik Jang, Jong Hoon Ryu
ETHNOPHARMACOLOGICAL RELEVANCE: Ziziphus jujuba var. spinosa (Bunge) Hu ex H.F Chow (rhamnaceae) and Codonopsis lanceolata (Siedbold & Zucc.) Benth. & Hook.f. ex Trautv. (campanulaceae), compositions of DHP1402, have long been used for treating anti-dementia or hypomnesia as folk medicine. AIM OF THE STUDY: It has been reported that Z. jujuba var. spinosa and C. lanceolata are effective on cognitive function with different mechanism of action. Therefore, in the present study, we evaluated the synergistic effects of Ziziphus jujuba var...
September 13, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28906364/altered-default-mode-network-configuration-in-posttraumatic-stress-disorder-after-earthquake-a-resting-stage-functional-magnetic-resonance-imaging-study
#2
Xiao-Dong Zhang, Yan Yin, Xiao-Lei Hu, Lian Duan, Rongfeng Qi, Qiang Xu, Guang-Ming Lu, Ling-Jiang Li
The neural substrates of posttraumatic stress disorder (PTSD) are still not fully elucidated. Hence, this study is to explore topological alterations of the default mode network (DMN) in victims with PTSD after a magnitude of 8.0 earthquake using resting-state functional magnetic resonance imaging (rs-fMRI).This study was approved by the local ethical review board, and all participants signed written informed consent. Sixty-two PTSD victims from the 2008 Sichuan earthquake and 62 matched exposed controls underwent rs-fMRI...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28901737/melatonin-improves-cognitive-deficits-via-restoration-of-cholinergic-dysfunction-in-a-mouse-model-of-scopolamine-induced-amnesia
#3
Bai Hui Chen, Joon Ha Park, Dae Won Kim, Jinseu Park, Soo Young Choi, In Hye Kim, Jeong Hwi Cho, Tae-Kyeong Lee, Jae Chul Lee, Choong-Hyun Lee, In Koo Hwang, Young-Myeong Kim, Bing Chun Yan, Il-Jun Kang, Bich Na Shin, Yun Lyul Lee, Myoung Cheol Shin, Jun Hwi Cho, Young Joo Lee, Yong Hwan Jeon, Moo-Ho Won, Ji Hyeon Ahn
Melatonin is known to improve cognitive deficits and its functions have been studied in various disease models, including Alzheimer's disease. In this study, we investigated effects of melatonin on cognition and the cholinergic system of the septum and hippocampus in a mouse model of scopolamine-induced amnesia. Scopolamine (1 mg/kg) and melatonin (10 mg/kg) were administered intraperitoneally to mice for 2 and 4 weeks. The Morris water maze and passive avoidance tests revealed that both treatments of scopolamine significantly impaired spatial learning and memory; however, 2- and 4-week melatonin treatments significantly improved the spatial learning and memory...
September 13, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28890054/home-cage-odors-spatial-cues-elicit-theta-phase-gamma-amplitude-coupling-between-olfactory-bulb-and-dorsal-hippocampus
#4
Roberta Ribas Pena, Daniel de Castro Medeiros, Leonardo de Oliveira Guarnieri, Julio Boriollo Guerra, Vinícius Rezende Carvalho, Eduardo Mazoni Andrade Marçal Mendes, Grace Schenatto Pereira, Márcio Flávio Dutra Moraes
The brain oscillations may play a critical role in synchronizing neuronal assemblies in order to establish appropriate sensory-motor integration. In fact, studies have demonstrated phase-amplitude coupling of distinct oscillatory rhythms during cognitive processes. Here we investigated whether olfacto-hippocampal coupling occurs when mice are detecting familiar odors located in a spatially restricted area of a new context. The spatial olfactory task (SOT) was designed to expose mice to a new environment in which only one quadrant (target) contains odors provided by its own home-cage bedding...
September 7, 2017: Neuroscience
https://www.readbyqxmd.com/read/28887385/prior-learning-of-relevant-non-aversive-information-is-a-boundary-condition-for-avoidance-memory-reconsolidation-in-the-rat-hippocampus
#5
Andressa Radiske, Maria Carolina Gonzalez, Sergio Conde-Ocaziones, Anatildes Feitosa, Cristiano A Köhler, Lia R Bevilaqua, Martín Cammarota
Reactivated memories can be modified during reconsolidation, making this process a potential therapeutic target for post-traumatic stress disorder (PTSD), a mental illness characterized by the recurring avoidance of situations that evoke trauma-related fears. However, avoidance memory reconsolidation depends on a set of still loosely defined boundary conditions, limiting the translational value of basic research. In particular, the involvement of the hippocampus in fear-motivated avoidance memory reconsolidation remains controversial...
September 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28884876/intranasal-insulin-treatment-restores-cognitive-deficits-and-insulin-signaling-impairment-induced-by-repeated-methamphetamine-exposure
#6
Elmira Beirami, Shahrbanoo Oryan, Seyedeh Masoumeh Seyedhoseini Tamijani, Abolhassan Ahmadiani, Leila Dargahi
Long-term use of methamphetamine (MA) causes a broad range of cognitive deficits. Recently, it has been reported insulin signaling and mitochondrial biogenesis are involved in cognitive processes. This study aimed to examine whether MA induces cognitive deficits concomitant with insulin signaling impairment and mitochondrial dysfunctions and also intranasal (IN) insulin treatment can reverse cognitive deficits caused by MA. Rats were repeatedly treated with increasing doses of MA (1-10 mg/kg) twice a day for 10 days, and their cognitive functions were assessed using Y-maze, novel object recognition and passive avoidance tasks...
September 8, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28881154/preconditioning-with-morphine-protects-hippocampal-ca1-neurons-against-ischemia-reperfusion-injury-via-the-activation-of-the-mtor-pathway
#7
Maedeh Arabian, Nahid Aboutaleb, Mansoureh Soleimani, Marjan Ajami, Rouhollah Habibey, Yousef Rezaei, Hamidreza Pazoki-Toroudi
In the present study, we examined the role of mammalian target of rapamycin (mTOR) to reveal the neuroprotective effects of chronic morphine preconditioning on the hippocampus following ischemia/reperfusion (I/R) injury. Morphine was administrated for 5 days twice a day before I/R injury induction. The role of mTOR was evaluated by the injection of rapamycin (5 mg/kg, ip) before I/R injury. The passive avoidance test was used to evaluate memory. Neuronal density and apoptosis were measured in the CA1 region, 72 hours after the induction of I/R injury...
September 7, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28877690/gypenosides-ameliorate-memory-deficits-in-mptp-lesioned-mouse-model-of-parkinson-s-disease-treated-with-l-dopa
#8
Ting Ting Zhao, Kyung Sook Kim, Keon Sung Shin, Hyun Jin Park, Hyun Jeong Kim, Kyung Eun Lee, Myung Koo Lee
BACKGROUND: Previous studies have revealed that gypenosides (GPS) improve the symptoms of anxiety disorders in a 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned rat model of Parkinson's disease (PD). The present study aimed to investigate the effects of GPS on memory deficits in an MPTP-lesioned mouse model of PD treated with L-3,4-dihydroxyphenylalanine (L-DOPA). METHODS: MPTP (30 mg/kg/day, 5 days)-lesioned mice were treated with GPS (50 mg/kg) and/or L-DOPA (10 and 25 mg/kg) for 21 days...
September 6, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28873707/green-tea-supplementation-produces-better-neuroprotective-effects-than-red-and-black-tea-in-alzheimer-like-rat-model
#9
Helen L Schimidt, Alexandre Garcia, Alexandre Martins, Pamela B Mello-Carpes, Felipe P Carpes
Green tea from Camellia sinensis plays a neuroprotective role in different neurodegenerative conditions, such as memory deficits in Alzheimer disease (AD). However, whether other teas from Camellia sinensis present similar neuroprotective effect still is not clear. Here we investigate effects of green, red and black tea supplementation on memory and hippocampus oxidative status in a rat model of Alzheimer-like disease (AD-like). METHOD: Wistar male rats were supplemented with green, red or black tea during 8weeks before Aβ intra-hippocampal injection (2μL of Aβ-25-35, CA1 region)...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28860809/perihippocampal-metastasis-following-hippocampus-avoiding-prophylactic-cranial-irradiation-for-small-cell-lung-cancer-a-case-report
#10
Seung-Gu Yeo
Prophylactic cranial irradiation (PCI) lowers the risk of brain metastasis (BM) and increases survival in small cell lung cancer (SCLC) patients, but it also entails a risk of neurocognitive dysfunction (NCD). One strategy to mitigate this neurotoxicity is hippocampus-avoiding (HA) whole-brain radiation therapy, as the hippocampus is mainly responsible for radiation-related NCD and hippocampal or perihippocampal metastases are rare. A few prospective clinical trials have demonstrated a reduction in NCD following HA whole-brain radiation therapy...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28860028/dissociative-amnesia-disproportionate-retrograde-amnesia-stressful-experiences-and-neurological-circumstances
#11
REVIEW
C Thomas-Antérion
Dissociative amnesias have been reported in neurological episodes mild enough to not cause any visible lesions on morphological examination. Disproportionate retrograde amnesia with or without identity loss happens in the context of psychological trauma (known or not). In metabolic imaging studies, some authors have reported functional alterations, particularly in the bilateral hippocampus, right temporal regions and inferolateral prefrontal cortex, despite normal morphological imaging. To avoid the presumption of an organic, psychogenic or mixed origin for such changes, De Renzi et al...
August 28, 2017: Revue Neurologique
https://www.readbyqxmd.com/read/28846920/protective-effect-of-naringin-on-pentylenetetrazole-ptz-induced-kindling-possible-mechanisms-of-antikindling-memory-improvement-and-neuroprotection
#12
Phani Kumar Kola, Annapurna Akula, Lakshmi Sudeepthi NissankaraRao, R Ch Sekhara Reddy Danduga
The present study investigated the effects of Naringin on seizure severity, progress of kindling, memory impairment, oxidative stress, neurochemicals, and neural damage in Pentylenetetrazole (PTZ)-induced kindling. Alternate intra-peritoneal injections of PTZ induced kindling at 22 injections of PTZ. In comparison with the PTZ group, pretreatment with Naringin 30 min prior to PTZ administration and on a PTZ-free day was found to lead to a decreased seizure score, a mitigated progress of kindling, decreased transfer latency, and increased total number of arm entries, % alternation behavior in Y maze, and % conditioned avoidance response in a pole climbing apparatus...
August 25, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28846187/increased-fear-learning-spatial-learning-as-well-as-neophobia-in-rgs2-mice
#13
A Raab, S Popp, K-P Lesch, M J Lohse, M Fischer, J Deckert, L Hommers
Anxiety disorders result from a complex interplay of genetic and environmental factors such as stress. On the level of cellular signaling, regulator of G protein signaling 2 (Rgs2) has been implicated in human and rodent anxiety. However, there is limited knowledge about the role of Rgs2 in fear learning and reactivity to stress. In the present study, Rgs2(-/-) mice showed increased fear learning, male mice displayed increased contextual and cued fear learning, while females showed selectively enhanced cued fear learning...
August 28, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/28838882/histamine-regulates-memory-consolidation
#14
REVIEW
Maria Beatrice Passani, Fernando Benetti, Patrizio Blandina, Cristiane R G Furini, Jociane de Carvalho Myskiw, Ivan Izquierdo
Recent findings have reasserted the role of histamine in the regulation of memory consolidation first proposed in 1986 in an inhibitory avoidance task in rats. They indicate that histamine is indeed a major regulator of memory consolidation in various tasks, through H2 receptors in the dorsal hippocampus and through H3 receptors in the basolateral amygdala, depending on the task. In the object recognition task, the memory enhancing effect is mediated by the three receptors (H1, H2, H3) in the dorsal hippocampus...
August 23, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28837234/a-precision-3d-conformal-treatment-technique-in-rats-application-to-whole-brain-radiotherapy-with-hippocampal-avoidance
#15
Suk W Yoon, Christina K Cramer, Devin A Miles, Michael H Reinsvold, Kyeung M Joo, David G Kirsch, Mark Oldham
PURPOSE: To develop and validate 3D conformal hippocampal sparing whole-brain radiation therapy (HA-WBRT) for Wistar rats utilizing precision 3D printed immobilization and micro-blocks. This technique paves the way for future pre-clinical studies investigating brain treatments that reduce neurotoxicity. METHODS AND MATERIALS: A novel pre-clinical treatment planning and delivery process was developed to enable precision 3D conformal treatment and hippocampal avoidance capability for the Xrad 225cx small animal irradiator...
August 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28830202/radiological-distribution-of-brain-metastases-and-it-s-implication-for-the-hippocampus-avoidance-in-whole-brain-radiotherapy-approach
#16
Yi-Min Han, Gang Cai, Wei-Min Chai, Cheng Xu, Lu Cao, Dan Ou, Jia-Yi Chen, Youlia M Kirova
PURPOSE: Hippocampus avoidance in whole brain radiotherapy (HA-WBRT) offers the feasibility of less impaired cognitive function than conventional WBRT. The study aims to assess the radiological distribution of BMs with relation to the hippocampus and peri-hippocampus(PH) region as defined by the RTOG 0933 for better understanding of margin definition in HA-WBRT treatment planning. METHODS: Consecutive patients with diagnosis of BM from enhanced MRI between 03/2011 and 07/2016 were analyzed...
August 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28827178/increase-in-cortical-endocannabinoid-signaling-in-a-rat-model-of-basal-forebrain-cholinergic-dysfunction
#17
Alberto Llorente-Ovejero, Iván Manuel, Maria Teresa Giralt, Rafael Rodríguez-Puertas
The basal forebrain cholinergic pathways progressively degenerate during the progression of Alzheimer's disease, leading to an irreversible impairment of memory and thinking skills. The stereotaxic lesion with 192IgG-saporin in the rat brain has been used to eliminate basal forebrain cholinergic neurons and is aimed at emulating the cognitive damage described in this disease in order to explore its effects on behavior and on neurotransmission. Learning and memory processes that are controlled by cholinergic neurotransmission are also modulated by the endocannabinoid (eCB) system...
August 18, 2017: Neuroscience
https://www.readbyqxmd.com/read/28822602/time-dependent-role-of-prefrontal-cortex-and-hippocampus-on-cognitive-improvement-by-aripiprazole-in-olfactory-bulbectomized-mice
#18
Kohei Takahashi, Osamu Nakagawasai, Wataru Nemoto, Takayo Odaira, Yuichiro Arai, Tadashi Hisamitsu, Koichi Tan-No
Dopamine (DA) modulates cognitive functions in the prefrontal cortex (PFC) and hippocampus. Olfactory bulbectomy (OBX) in mice induces cognitive dysfunctions. Recently, we reported that aripiprazole (ARI) normalizes the behavioral hyper-responsivity to DA agonists in OBX mice. However, it remains unclear whether ARI affects OBX-induced cognitive dysfunctions. To address this question we evaluated ARI-treated and untreated OBX mice in a passive avoidance test. Then, we investigated the effects of ARI on cell proliferation in the hippocampal dentate gyrus by immunohistochemistry, and on c-fos levels in the PFC and hippocampus, as well as nerve growth factor (NGF) levels in the hippocampus by western blotting...
August 16, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28818702/the-effects-of-cannabinoid-receptors-activation-and-glucocorticoid-receptors-deactivation-in-the-amygdala-and-hippocampus-on-the-consolidation-of-a-traumatic-event
#19
Noa Shoshan, Irit Akirav
Ample evidence demonstrates that fear learning contributes significantly to many anxiety pathologies including post-traumatic stress disorder (PTSD). The endocannabinoid (eCB) system may offer therapeutic benefits for PTSD and it is a modulator of the hypothalamic pituitary adrenal (HPA) axis. Here we compared the separated and combined effects of blocking glucocorticoid receptors (GRs) using the GR antagonist RU486 and enhancing CB1r signaling using the CB1/2 receptor agonist WIN55,212-2 in the CA1 and basolateral amygdala (BLA) on the consolidation of traumatic memory...
August 15, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28817956/the-role-of-intrinsic-brain-functional-connectivity-in-vulnerability-and-resilience-to-bipolar-disorder
#20
Gaelle E Doucet, Danielle S Bassett, Nailin Yao, David C Glahn, Sophia Frangou
OBJECTIVE: Bipolar disorder is a heritable disorder characterized by mood dysregulation associated with brain functional dysconnectivity. Previous research has focused on the detection of risk- and disease-associated dysconnectivity in individuals with bipolar disorder and their first-degree relatives. The present study seeks to identify adaptive brain connectivity features associated with resilience, defined here as avoidance of illness or delayed illness onset in unaffected siblings of patients with bipolar disorder...
August 18, 2017: American Journal of Psychiatry
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