keyword
MENU ▼
Read by QxMD icon Read
search

Scopolamine

keyword
https://www.readbyqxmd.com/read/29775673/gender-dependent-contribution-of-muscarinic-receptors-in-memory-retrieval-under-sub-chronic-stress
#1
Habiba Rashid, Touqeer Ahmed
Stress induces retrograde amnesia in humans and rodents. Muscarinic antagonism under normal physiological conditions causes gender dependent impairment in episodic memory retrieval. We aimed to explore the gender dependent role of muscarinic receptors in memory retrieval under sub-chronic stress condition. Male and female mice were trained for Morris water maze test and contextual fear conditioning, followed by 3 hour restraint stress per day for five days. Stress was either given alone or in combination with a daily subcutaneous injection of scopolamine (1 mg/kg) or donepezil (1 mg/kg)...
May 15, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29770155/neuroprotective-effect-and-molecular-mechanism-of-6-gingerol-against-scopolamine-induced-amnesia-in-c57bl-6-mice
#2
Chang-Yul Kim, Yongtaek Seo, Chan Lee, Gyu Hwan Park, Jung-Hee Jang
We have investigated the neuroprotective and memory enhancing effect of [6]-gingerol (GIN), a pungent ingredient of ginger, using an animal model of amnesia. To determine the neuroprotective effect of GIN on cognitive dysfunction, scopolamine (SCO, 1 mg/kg, i.p.) was injected into C57BL/6 mice, and a series of behavioral tests were conducted. SCO-induced behavior changes and memory impairments, such as decreased alteration (%) in Y-maze test, increased mean escape latency in water maze test, diminished step-through latency in passive avoidance test, and shortened freezing time in fear condition test, were significantly prevented and restored by the oral administration of GIN (10 or 25 mg/kg/day)...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29755345/analogous-%C3%AE-carboline-alkaloids-harmaline-and-harmine-ameliorate-scopolamine-induced-cognition-dysfunction-by-attenuating-acetylcholinesterase-activity-oxidative-stress-and-inflammation-in-mice
#3
Shu-Ping Li, Yu-Wen Wang, Sheng-Lan Qi, Yun-Peng Zhang, Gang Deng, Wen-Zheng Ding, Chao Ma, Qi-Yan Lin, Hui-Da Guan, Wei Liu, Xue-Mei Cheng, Chang-Hong Wang
The analogous β-carboline alkaloids, harmaline (HAL) and harmine (HAR), possess a variety of biological properties, including acetylcholinesterase (AChE) inhibitory activity, antioxidant, anti-inflammatory, and many others, and have great potential for treating Alzheimer's disease (AD). However, studies have showed that the two compounds have similar structures and in vitro AChE inhibitory activities but with significant difference in bioavailability. The objective of this study was to comparatively investigate the effects of HAL and HAR in memory deficits of scopolamine-induced mice...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29751707/-mechanism-exploration-on-nitrogen-metabolism-and-secondary-metabolism-in-atropa-belladonna-hairy-roots-treated-with-yeast-extract
#4
Shuang Guo, Yi Yang, Xing Liu, Neng-Biao Wu
In order to study the mechanism of nitrogen metabolism and secondary metabolism in Atropa belladonna hairy roots treated with yeast extract, yeast extract(YE) was added to the culture medium. Then the changes of physiological and biochemical indexes of A. belladonna hairy roots after treatment with YE were detected. The results are as follows,the activity of key enzymes of nitrogen metabolism changed differently. Compared with the control group (CK), the activity of nitrate reductase (NR) and glutamine synthetase (GS) were significantly increased, while the activity of glutamate dehydrogenase (GDH) was not changed significantly...
April 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29745257/beneficial-effects-of-urtica-dioica-on-scopolamine-induced-memory-impairment-in-rats-protection-against-acetylcholinesterase-activity-and-neuronal-oxidative-damage
#5
Simagol Ghasemi, Malihe Moradzadeh, Mahmoud Hosseini, Farimah Beheshti, Hamid Reza Sadeghnia
This study was conducted to investigate protective effects of Urtica dioica extract on acetylcholinesterase (AChE) activity and the oxidative damage of brain tissues in scopolamine-induced memory impairment model. The rats were treated with (1) saline (control), (2) scopolamine, and (3-5) the plant extract (20, 50, or 100 mg/kg) before scopolamine. The traveled distance and the latency to find the platform in Morris water maze (MWM) by scopolamine-treated group were longer while the time spent in target quadrant was shorter than those of the control...
May 10, 2018: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/29740317/-moringa-oleifera-seed-extract-alleviates-scopolamine-induced-learning-and-memory-impairment-in-mice
#6
Juan Zhou, Wu-Shuang Yang, Da-Qin Suo, Ying Li, Lu Peng, Lan-Xi Xu, Kai-Yue Zeng, Tong Ren, Ying Wang, Yu Zhou, Yun Zhao, Li-Chao Yang, Xin Jin
The extract of Moringa oleifera seeds has been shown to possess various pharmacological properties. In the present study, we assessed the neuropharmacological effects of 70% ethanolic M. oleifera seed extract (MSE) on cognitive impairment caused by scopolamine injection in mice using the passive avoidance and Morris water maze (MWM) tests. MSE (250 or 500 mg/kg) was administered to mice by oral gavage for 7 or 14 days, and cognitive impairment was induced by intraperitoneal injection of scopolamine (4 mg/kg) for 1 or 6 days...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29740000/ameliorative-potential-of-desalted-salicornia-europaea-l-extract-in-multifaceted-alzheimer-s-like-scopolamine-induced-amnesic-mice-model
#7
Govindarajan Karthivashan, Shin-Young Park, Mee-Hyang Kweon, Joonsoo Kim, Md Ezazul Haque, Duk-Yeon Cho, In-Su Kim, Eun-Ah Cho, Palanivel Ganesan, Dong-Kug Choi
The Salicornia europaea L. (SE) plant is a halophyte that has been widely consumed as a seasoned vegetable, and it has been recently reported to counteract chronic diseases related to oxidative and inflammatory stress. In this study, we performed an initial phytochemical analysis with in vitro biochemical tests and chromatographic profiling of desalted and enzyme-digested SE ethanol extract (SE-EE). Subsequently, we evaluated the anti-neuroinflammatory and ameliorative potential of SE-EE in LPS-inflicted BV-2 microglial cells and scopolamine-induced amnesic C57/BL6N mice, respectively...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29736181/improvement-of-learning-and-memory-induced-by-cordyceps-polypeptide-treatment-and-the-underlying-mechanism
#8
Guangxin Yuan, Liping An, Yunpeng Sun, Guangyu Xu, Peige Du
Our previous research revealed that Cordyceps militaris can improve the learning and memory, and although the main active ingredient should be its polypeptide complexes, the underlying mechanism of its activity remains poorly understood. In this study, we explored the mechanisms by which Cordyceps militaris improves learning and memory in a mouse model. Mice were given scopolamine hydrobromide intraperitoneally to establish a mouse model of learning and memory impairment. The effects of Cordyceps polypeptide in this model were tested using the Morris water maze test; serum superoxide dismutase activity; serum malondialdehyde levels; activities of acetyl cholinesterase, Na+-k+-ATPase, and nitric oxide synthase; and gamma aminobutyric acid and glutamate contents in brain tissue...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29729357/effects-of-systemic-cholinergic-antagonism-on-reinforcer-devaluation-in-macaques
#9
Hannah F Waguespack, Ludise Málková, Patrick A Forcelli, Janita Turchi
The capacity to adjust actions based on new information is a vital cognitive function. An animal's ability to adapt behavioral responses according to changes in reward value can be measured using a reinforcer devaluation task, wherein the desirability of a given object is reduced by decreasing the value of the associated food reinforcement. Elements of the neural circuits serving this ability have been studied in both rodents and nonhuman primates. Specifically, the basolateral amygdala, orbitofrontal cortex, nucleus accumbens, and mediodorsal thalamus have each been shown to play a critical role in the process of value updating, required for adaptive goal selection...
May 2, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29729289/astrocytes-activation-contributes-to-the-antidepressant-like-effect-of-ketamine-but-not-scopolamine
#10
Yun Wang, Liming Xie, Ce Gao, Lingyan Zhai, Ning Zhang, Lin Guo
Depression is a common, debilitating mood disorder, but currently available antidepressants have several major drawbacks. Both ketamine and scopolamine attract more and more attention due to their rapid and sustained antidepressant activities. However, the molecular and cellular mechanism that underlies the therapeutic action of ketamine and scopolamine still remain to be elucidated. Considering the importance of astrocytes in the development of depression, we hypothesized that the activation of astrocyte may play a vital role in the antidepressant effects of ketamine and scopolamine...
May 3, 2018: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/29716575/terminalia-chebula-extract-prevents-scopolamine-induced-amnesia-via-cholinergic-modulation-and-anti-oxidative-effects-in-mice
#11
Min-Soo Kim, Dong Young Lee, Jun Lee, Hyun Woo Kim, Sang Hyun Sung, Jung-Soo Han, Won Kyung Jeon
BACKGROUND: Terminalia chebula Retz. (Combretaceae) is a traditional herbal medicine that is widely used in the treatment of diabetes, immunodeficiency diseases, and stomach ulcer in Asia. However, the anti-amnesic effect of T. chebula has not yet been investigated. The present study was designed to determine whether T. chebula extract (TCE) alleviates amnesia induced by scopolamine in mice. We also investigated possible mechanisms associated with cholinergic system and anti-oxidant effects...
May 2, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29710687/analysis-of-human-microcirculation-in-weightlessness-study-protocol-and-pre-study-experiments
#12
Nana-Yaw Bimpong-Buta, Peter Jirak, Bernhard Wernly, Michael Lichtenauer, Maryna Masyuk, Johanna Maria Muessig, Kristina Braun, Sema Kaya, Malte Kelm, Christian Jung
BACKGROUND: In weightlessness, alterations in organ systems have been reported. The microcirculation consists of a network of blood vessels with diameters of a few μm. It is considered the largest part of the circulatory system of the human body and essential for exchange of gas, nutrients and waste products. An investigation of the microcirculation in weightlessness seems warranted but has not yet been performed. OBJECTIVE: In this paper, we outline a study in which we will investigate the possible interrelations between weightlessness and microcirculation...
April 14, 2018: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29705823/predictive-factors-for-the-development-of-irinotecan-related-cholinergic-syndrome-using-ordered-logistic-regression-analysis
#13
Yuko Kanbayashi, Takeshi Ishikawa, Motohiro Kanazawa, Yuki Nakajima, Yusuke Tabuchi, Rumi Kawano, Tomoko Yoshioka, Naohisa Yoshida, Toyoshi Hosokawa, Koichi Takayama, Tetsuya Taguchi
Cholinergic syndrome is an acute adverse reaction associated with irinotecan. Development of cholinergic syndrome can be ameliorated or prevented by administering various anticholinergics, including atropine sulfate or scopolamine butylbromide. Although many of the side effects are transient and non-life-threatening, their onset is painful and can lower a patient's quality of life (QoL). This retrospective study was performed to identify predictive factors of the development of irinotecan-related cholinergic syndrome in order to develop future strategies for improving the QoL of patients undergoing chemotherapy...
April 28, 2018: Medical Oncology
https://www.readbyqxmd.com/read/29705288/endogenous-acetylcholine-regulates-neuronal-and-astrocytic-vascular-endothelial-growth-factor-expression-levels-via-different-acetylcholine-receptor-mechanisms
#14
Kyoko Kimura, Kinzo Matsumoto, Hironori Ohtake, Jun-Ichiro Oka, Hironori Fujiwara
Vascular endothelial growth factor (VEGF), a signaling molecule involved in angiogenesis, plays an important role in neuroprotection and neurogenesis. In the present study, we aimed to elucidate the mechanisms underlying endogenous acetylcholine (ACh)-induced VEGF expression in neurons and astrocytes, and identify the neuronal cells contributing to its expression in the medial septal area, a nuclear origin of cholinergic neurons mainly projecting to the hippocampus. The mRNA expression and secretion of VEGF were measured by RT-PCR and ELISA using mouse primary cultured cortical neurons and astrocytes...
April 26, 2018: Neurochemistry International
https://www.readbyqxmd.com/read/29704983/intermittent-stimulation-in-the-nucleus-basalis-of-meynert-improves-sustained-attention-in-rhesus-monkeys
#15
Ruifeng Liu, Jonathan Crawford, Patrick M Callahan, Alvin V Terry, Christos Constantinidis, David T Blake
Sustained attention is essential in important behaviors in daily life. Many neuropsychiatric disorders are characterized by a compromised ability to sustain attention, making this cognitive domain an important therapeutic target. In this study, we tested a novel method of improving sustained attention. Monkeys were engaged in a continuous performance task (CPT) while the nucleus basalis of Meynert (NB), the main source of cholinergic innervation of the neocortex, was stimulated. Intermittent NB stimulation improved the animals' performance by increasing the hit rate and decreasing the false alarm rate...
April 26, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29687372/alterations-in-the-neurobehavioral-phenotype-and-znt3-cb-d28k-expression-in-the-cerebral-cortex-following-lithium-pilocarpine-induced-status-epilepticus-the-ameliorative-effect-of-leptin
#16
Hong Ni, Su-Hong Chen, Li-Li Li, Mei-Fang Jin
Zinc transporter 3 (ZnT3)-dependent "zincergic" vesicular zinc accounts for approximately 20% of the total zinc content of the mammalian telencephalon. Elevated hippocampal ZnT3 expression is acknowledged to be associated with mossy fiber sprouting and cognitive deficits. However, no studies have compared the long-term neurobehavioral phenotype with the expression of ZnT3 in the cerebral cortex following status epilepticus (SE). The aim of this study was to investigate changes in the long-term neurobehavioral phenotype as well as the expression of ZnT3 and calcium homeostasis-related CB-D28k in the cerebral cortex of rats subjected to neonatal SE and to determine the effects of leptin treatment immediately after neonatal SE...
April 23, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29681486/novel-naphthyloxy-derivatives-potent-histamine-h-3-receptor-ligands-synthesis-and-pharmacological-evaluation
#17
Dorota Łażewska, Maria Kaleta, Stefanie Hagenow, Szczepan Mogilski, Gniewomir Latacz, Tadeusz Karcz, Annamaria Lubelska, Ewelina Honkisz, Jadwiga Handzlik, David Reiner, Grzegorz Satała, Barbara Filipek, Holger Stark, Katarzyna Kieć-Kononowicz
A series of 1- and 2-naphthyloxy derivatives were synthesized and evaluated for histamine H3 receptor affinity. Most compounds showed high affinities with Ki values below 100 nM. The most potent ligand, 1-(5-(naphthalen-1-yloxy)pentyl)azepane (11) displayed high affinity for the histamine H3 receptor with a Ki value of 21.9 nM. The antagonist behaviour of 11 was confirmed both in vitro in the cAMP assay (IC50  = 312 nM) and in vivo in the rat dipsogenia model (ED50  = 3.68 nM). Moreover, compound 11 showed positive effects on scopolamine induced-memory deficits in mice (at doses of 10 and 15 mg/kg) and an analgesic effect in the formalin test in mice with ED50  = 30...
April 11, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29681009/effect-of-trigonella-foenum-graecum-linn-seeds-methanol-extract-on-learning-and-memory
#18
Tahira Assad, Rafeeq Alam Khan, Muhammad Ali Rajput
Prevention and delay in the onset of memory disorders will have a great impact on society by reducing the disease burden and finances. Drugs available for the treatment of learning and memory disorders are few. There is need to develop a better drug, several studies have shown the therapeutic effectiveness of herbal extracts for the learning and memory disorders because of their neuroprotective effects, hence herbs should be evaluated scientifically to form a basis for the future discovery of newer drugs. In this study, effect of Trigonella-foenum graecum L...
April 21, 2018: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29680979/phencyclidine-and-scopolamine-for-modeling-amnesia-in-rodents-direct-comparison-with-the-use-of-barnes-maze-test-and-contextual-fear-conditioning-test-in-mice
#19
Natalia Malikowska-Racia, Adrian Podkowa, Kinga Sałat
Nowadays cognitive impairments are a growing unresolved medical issue which may accompany many diseases and therapies, furthermore, numerous researchers investigate various neurobiological aspects of human memory to find possible ways to improve it. Until any other method is discovered, in vivo studies remain the only available tool for memory evaluation. At first, researchers need to choose a model of amnesia which may strongly influence observed results. Thereby a deeper insight into a model itself may increase the quality and reliability of results...
April 21, 2018: Neurotoxicity Research
https://www.readbyqxmd.com/read/29674331/ono-8590580-a-novel-gaba-a-%C3%AE-5-negative-allosteric-modulator-enhances-long-term-potentiation-and-improves-cognitive-deficits-in-preclinical-models
#20
Soichi Kawaharada, Miki Nakanishi, Nobuto Nakanishi, Keisuke Hazama, Masato Higashino, Arwel Lewis, Gary S Clark, Mark S Chambers, Scott A Maidment, Tetsuya Yasuhiro, Seishi Katsumata, Shuji Kaneko
GABAA receptors containing α5 subunits (GABAA α5) are highly expressed in the hippocampus and negatively involved in memory processing, as shown by the fact that GABAA α5 deficient mice show higher hippocampus-dependent performance than wild type mice. Accordingly, small molecule GABAA α5 negative allosteric modulators (NAMs) are known to enhance spatial learning and memory in rodents. Here we introduce a new, orally-available GABAA α5 NAM that improves hippocampal functions. ONO-8590580 binds to the benzodiazepine binding sites on recombinant human α5-containing GABAA receptors with a Ki of 7...
April 19, 2018: Journal of Pharmacology and Experimental Therapeutics
keyword
keyword
48758
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"