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Lv J, Jiang N, Wang H, Huang H, Bao Y, Chen Y, Liu X. Simulated weightlessness induces cognitive changes in rats illustrated by performance in operant conditioning tasks. LIFE SCIENCES IN SPACE RESEARCH 2021; 29:63-71. [PMID: 33888289 DOI: 10.1016/j.lssr.2021.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/17/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
The weightless environment encountered in space flight can cause cognitive changes, affecting mission execution and endanger mission safety. Ground simulations provide the means to evaluate these effects and the resulting risks. In this study, rats were used as model animals and subjected to simulated weightlessness by suspending them from their tails. Tail-suspension and operant task learning experiments were conducted to study the effects of simulated weightlessness on the complex operant conditioning abilities of the subject's acquisition, maintenance, and signal discrimination skills. The results showed that simulated weightlessness did not affect the animals' acquisition abilities but did affect their ability to maintain learned reflexes and recognize signals. This study may have general potential to research the effects of weightlessness on cognition in the space environment.
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Affiliation(s)
- Jingwei Lv
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Ning Jiang
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Haixia Wang
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Hong Huang
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
| | - Yu Bao
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China; Jilin Agricultural University, Changchun 130118, China
| | - Ying Chen
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Xinmin Liu
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
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Jiang N, Wang K, Zhang Y, Huang H, Lv JW, Wang Q, Wang HX, Xia TJ, Liu XM. Protective effect of ginsenoside Rb1 against chronic restraint stress (CRS)-induced memory impairments in rats. Behav Brain Res 2021; 405:113146. [PMID: 33545198 DOI: 10.1016/j.bbr.2021.113146] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/21/2021] [Accepted: 01/23/2021] [Indexed: 12/13/2022]
Abstract
Ginsenoside Rb1 (Rb1) is one of the most active components found in ginseng and provides important benefits to the central nervous system, especially for the improvement of learning and memory. Previous studies demonstrated that Rb1 protected against scopolamine-induced amnesia and exhibited memory-enhancing effects in the SAMP8 mouse model. However, the effects of Rb1 against chronic restraint stress (CRS)-induced cognitive impairments, especially the role of Rg1 on the performance of reward directed instrumental conditioning have not been investigated. In this study, rats were subjected to CRS (6 h/day) for 28 days. Thereafter, behavioural tests including reward-directed instrumental conditioning task (RICT) and the Morris water maze (MWM) task were conducted. Administered of Rb1 (6.75 and 13.5 mg/kg, i.p.) remarkably ameliorated the memory impairments caused by CRS as evident from the results of RICT and MWM task, and this effect was accompanied by noticeable alterations in the levels of oxidative markers (superoxide dismutase, catalase, and lipid peroxidation) in the hippocampus. Additionally, Rb1 reduced the ratio of Bax:Bcl-2 and the expression of cleaved caspase-3 and cleaved caspase-9, increased the levels of synaptophysin (SYP) and postsynaptic density 95 (PSD95) and activated the BDNF/TrkB pathway in the hippocampus. In summary, the present study demonstrated that Rb1 rescues cognitive deficits induced by CRS is partially mediated by antagonizing oxidative stress and apoptosis, improving synaptic plasticity and restoring the BDNF/TrkB signalling pathway. This newly discovered effect of Rb1 sheds light on its applications in the development of therapeutic interventions to alleviate the deleterious effects of chronic stress.
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Affiliation(s)
- Ning Jiang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Kezhu Wang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yiwen Zhang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hong Huang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jing-Wei Lv
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Qiong Wang
- Affiliated TCM Hospital/School of Pharmacy/Sino-Portugal TCM International Cooperation Center, Southwest Medical University, Luzhou, 646000, China
| | - Hai-Xia Wang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Tian-Ji Xia
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xin-Min Liu
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Affiliated TCM Hospital/School of Pharmacy/Sino-Portugal TCM International Cooperation Center, Southwest Medical University, Luzhou, 646000, China.
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Yang Y, Hu S, Lin H, He J, Tang C. Electroacupuncture at GV24 and bilateral GB13 improves cognitive ability via influences the levels of Aβ, p-tau (s396) and p-tau (s404) in the hippocampus of Alzheimer's disease model rats. Neuroreport 2020; 31:1072-1083. [PMID: 32881772 PMCID: PMC7515480 DOI: 10.1097/wnr.0000000000001518] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 07/26/2020] [Indexed: 12/14/2022]
Abstract
Acupuncture is widely used to treat various neurodegenerative diseases and can effectively improve cognitive and memory states in Alzheimer's disease. However, its mechanism is unclear. We speculated that the effect of acupuncture on cognitive function may be associated with reductions in the levels of Aβ and phosphorylated tau in the brain. In this experiment, 60 male Sprague-Dawley rats were randomly divided into control, model, electroacupuncture and nonacupoint groups. We perform electroacupuncture at Shenting (GV24) and bilateral Benshen (GB13) acupoints once a day for 4 weeks in electroacupuncture group (with 1 day of rest after every 6 days of treatment). The electroacupuncture group showed a better performance in cognitive-related behavior tests and significantly lowers the levels of Aβ, p-tau (s396) and p-tau (s404) in the hippocampus. These results may suggest that electroacupuncture at the GV24 and bilateral GB13 acupoints might improve cognitive functions in Alzheimer's disease by decreasing the levels of Aβ, p-tau (s396) and p-tau (s404) in the brain as these proteins are the main causes of neurological damage and cognitive dysfunction during the pathogenesis underlying Alzheimer's disease.
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Affiliation(s)
- Yang Yang
- Department of Rehabilitation, Affiliated Jiangmen Traditional Chinese Medicine Hospital of Ji’nan University, Ji’nan University, Jiangmen
| | - Shaowen Hu
- Department of Rehabilitation, Shenzhen Bao’an Traditional Chinese Medicine Hospital Group, Guangzhou University of Chinese Medicine, Shenzhen
| | - Haibo Lin
- Department of Rehabilitation, Affiliated Jiangmen Traditional Chinese Medicine Hospital of Ji’nan University, Ji’nan University, Jiangmen
| | - Jiang He
- College of Acupuncture and Moxibustion, Guangxi University of Chinese Medicine, Guangxi
| | - Chunzhi Tang
- Clinical Medical College of Acupuncture and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
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Huang L, Peng Z, Lu C, Chen Y, Lv JW, Qin M, Liao DF, Liu XM, Shi Z. Ginsenoside Rg1 alleviates repeated alcohol exposure-induced psychomotor and cognitive deficits. Chin Med 2020; 15:44. [PMID: 32411290 PMCID: PMC7206760 DOI: 10.1186/s13020-020-00325-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 04/28/2020] [Indexed: 12/25/2022] Open
Abstract
Background Chronic alcohol consumption disrupts psychomotor and cognitive functions, most of which are subserved by the dysfunction of hippocampus. Dysregulated excitatory glutamatergic transmission is implicated in repeated alcohol induced psychomotor and cognitive impairment. Ginsenoside Rg1, one of the main active ingredient of the traditional tonic medicine Panax ginseng C.A. Meyer (Araliaceae), has been used to treat cognitive deficits. Particularly, Rg1 has been demonstrated to improve hippocampus-dependent learning in mice and attenuate glutamate-induced excitotoxicity in vitro. Thus, in the present research, we sought to investigate the therapeutic effects of Ginsenoside Rg1 on repeated alcohol induced psychomotor and cognitive deficits in hippocampal-dependent behavioral tasks and unravel the underpinnings of its neuroprotection. Methods Male ICR (CD-1) mice were consecutively intragastrically treated with 20% (w/v) alcohol for 21 days. Then, behavior tests were conducted to evaluate repeated alcohol induced psychomotor and cognitive deficits. Histopathological changes, and biochemical and molecular alterations were assessed to determine the potential neuroprotective mechanism of Rg1. Results The results suggested that Rg1, at the optimal dose of 6 mg/kg, has the potential to ameliorate repeated alcohol induced cognitive deficits by regulating activities of NR2B containing NMDARs and excitotoxic signaling. Conclusion Our findings further provided a new strategy to treat chronic alcohol exposure induced adverse consequences.
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Affiliation(s)
- Lu Huang
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China.,2Guangdong-Hongkong-Macau Institute of CNS Regeneration, Ministry of Education CNS Regeneration Collaborative Joint Laboratory, Jinan University, Guangzhou, 510632 China
| | - Zhuang Peng
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China.,5College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029 China
| | - Cong Lu
- 3Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193 China
| | - Ying Chen
- 4Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700 China
| | - Jing-Wei Lv
- 3Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193 China
| | - Meng Qin
- 5College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029 China
| | - Duan-Fang Liao
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China
| | - Xin-Min Liu
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China.,3Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193 China
| | - Zhe Shi
- 1Division of Stem Cell Regulation and Application, Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China
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Nasiri E, Alizadeh A, Roushandeh AM, Gazor R, Hashemi-Firouzi N, Golipoor Z. Melatonin-pretreated adipose-derived mesenchymal stem cells efficeintly improved learning, memory, and cognition in an animal model of Alzheimer's disease. Metab Brain Dis 2019; 34:1131-1143. [PMID: 31129766 DOI: 10.1007/s11011-019-00421-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 04/17/2019] [Indexed: 12/19/2022]
Abstract
Currently, mesenchymal stem cells (MSCs) based therapy has extensive attraction for Alzheimer's disease (AD). However, low survival rate of MSCs after transplantation is a huge challenging. The current study aimed to improve adipose-derived MSCs (AD-MSCs)-based therapy by their pre-treatment with melatonin (MT) 'a well-known antioxidant' in an animal model of AD. In this study, after isolating rat AD-MSCs from the epididymal white adipose tissues, the cells were pretreated with 5μM of MT for 24 hours. Forty male Wistar rats were randomly allocated to control, sham, amyloid-beta (Aβ) peptide, AD-MSCs and MT-pretreated ADMSCs groups. The novel object recognition, passive avoidance test, Morris water maze and open field test were performed two months following the cell transplantation. The rats were sacrificed 69 days following cell therapy. The brain tissues were removed for histopathological analysis and also immunohistochemistry was performed for two Aβ1-42 and Iba1 proteins. It has been revealed that both AD-MSCs and MT-AD-MSCs migrated to brain tissues after intravenous transplantation. However, MT-ADMSCs significantly improved learning, memory and cognition compared with AD-MSCs (P<0.05). Furthermore, clearance of Aβ deposition and reduction of microglial cells were significantly increased in the MT-ADMSCs compared with AD-MSCs. Although stem cell therapy has been introduced as a promising strategy in neurodegenerative diseases, however, its therapeutic properties are limited. It is suggested that pretreatment of MSCs with melatonin partly would increase the cells efficiency and consequently could decrease AD complication including memory and cognition.
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Affiliation(s)
- Ebrahim Nasiri
- Cellular and Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Akram Alizadeh
- Department of Tissue Engineering and Applied Cell Sciences, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | | | - Rouhollah Gazor
- Cellular and Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | | | - Zoleikha Golipoor
- Cellular and Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
- Neurophysiology Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.
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Yang BY, Tan JY, Liu Y, Liu B, Jin S, Guo HW, Kuang HX. A UPLC-TOF/MS-based metabolomics study of rattan stems ofSchisandra chinensiseffects on Alzheimer's disease rats model. Biomed Chromatogr 2017; 32. [DOI: 10.1002/bmc.4037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 06/07/2017] [Accepted: 06/20/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Bing-You Yang
- Key Laboratory of Chinese Materia Medica (Ministry of Education); Heilongjiang University of Chinese Medicine; Harbin People's Republic of China
| | - Jin-Yan Tan
- Key Laboratory of Chinese Materia Medica (Ministry of Education); Heilongjiang University of Chinese Medicine; Harbin People's Republic of China
| | - Yan Liu
- Key Laboratory of Chinese Materia Medica (Ministry of Education); Heilongjiang University of Chinese Medicine; Harbin People's Republic of China
| | - Bo Liu
- Key Laboratory of Chinese Materia Medica (Ministry of Education); Heilongjiang University of Chinese Medicine; Harbin People's Republic of China
| | - Shuang Jin
- Key Laboratory of Chinese Materia Medica (Ministry of Education); Heilongjiang University of Chinese Medicine; Harbin People's Republic of China
| | - Hong-Wei Guo
- Key Laboratory of Chinese Materia Medica (Ministry of Education); Heilongjiang University of Chinese Medicine; Harbin People's Republic of China
| | - Hai-Xue Kuang
- Key Laboratory of Chinese Materia Medica (Ministry of Education); Heilongjiang University of Chinese Medicine; Harbin People's Republic of China
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Lu C, Shi Z, Sun X, Pan R, Chen S, Li Y, Qu L, Sun L, Dang H, Bu L, Chen L, Liu X. Kai Xin San aqueous extract improves Aβ 1-40-induced cognitive deficits on adaptive behavior learning by enhancing memory-related molecules expression in the hippocampus. JOURNAL OF ETHNOPHARMACOLOGY 2017; 201:73-81. [PMID: 27751826 DOI: 10.1016/j.jep.2016.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 09/18/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Kai Xin San (KXS), a traditional formula of Chinese medicine, has been used to treat dementia. AIM OF THE STUDY The present study aimed to investigate its ameliorating effects on Aβ1-40-induced cognitive impairment in rats using a series of novel reward-directed instrumental learning tasks, and to determine its possible mechanism of action. MATERIALS AND METHODS Rats were pretreated with KXS aqueous extract (0.72 and 1.44g/kg, p.o.) for 10 days, and were trained to gain reward reinforcement by lever pressing at the meantime. Thereafter, rats received a bilateral microinjection of Aβ1-40 in CA1 regions of the hippocampus. Cognitive performance was evaluated with the goal directed (higher response ratio) and habit (visual signal discrimination and extinction) learning tasks, as well as on the levels of memory-related biochemical parameters and molecules. RESULTS Our findings first demonstrated that KXS can improve Aβ1-40-induced amnesia in RDIL via enhancing the comprehension of action-outcome association and the utilization of cue information to guide behavior. Then, its ameliorating effects should be attributed to the modulation of memory-related molecules in the hippocampus. CONCLUSION In conclusion, KXS has the potential to prevent and/or delay the deterioration of cognitive impairment in AD.
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Affiliation(s)
- Cong Lu
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - Zhe Shi
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiuping Sun
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ruile Pan
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shanguang Chen
- China Astronaut Research and Training Center, Beijing, China
| | - Yinghui Li
- China Astronaut Research and Training Center, Beijing, China
| | - Lina Qu
- China Astronaut Research and Training Center, Beijing, China
| | - Lihua Sun
- Chinese Academy of Chinese Medical Sciences, Beijing, China
| | - Haixia Dang
- Chinese Academy of Chinese Medical Sciences, Beijing, China
| | - Lanlan Bu
- Hunan University of Traditional Chinese Medicine, Changsha, Hunan, China
| | - Lingling Chen
- Hunan University of Traditional Chinese Medicine, Changsha, Hunan, China
| | - Xinmin Liu
- Research Center for Pharmacology & Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Hunan University of Traditional Chinese Medicine, Changsha, Hunan, China.
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Xu P, Wang K, Lu C, Dong L, Chen Y, Wang Q, Shi Z, Yang Y, Chen S, Liu X. Effects of the chronic restraint stress induced depression on reward-related learning in rats. Behav Brain Res 2017; 321:185-192. [DOI: 10.1016/j.bbr.2016.12.045] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 12/25/2016] [Accepted: 12/29/2016] [Indexed: 12/16/2022]
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Kezhu W, Pan X, Cong L, Liming D, Beiyue Z, Jingwei L, Yanyan Y, Xinmin L. Effects of Ginsenoside Rg1 on Learning and Memory in a Reward-directed Instrumental Conditioning Task in Chronic Restraint Stressed Rats. Phytother Res 2016; 31:81-89. [DOI: 10.1002/ptr.5733] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 09/07/2016] [Accepted: 09/14/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Wang Kezhu
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
| | - Xu Pan
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
| | - Lu Cong
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
| | - Dong Liming
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
| | - Zhang Beiyue
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
- Beijing University of Chinese Medicine; Chaoyang District, Beijing 100029 China
| | - Lu Jingwei
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
| | - Yang Yanyan
- China Astronauts Research and Training Center; Beijing 100094 China
| | - Liu Xinmin
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
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Shi Z, Lu C, Sun X, Wang Q, Chen S, Li Y, Qu L, Chen L, Bu L, Liao D, Liu X. Tong Luo Jiu Nao ameliorates Aβ1-40-induced cognitive impairment on adaptive behavior learning by modulating ERK/CaMKII/CREB signaling in the hippocampus. Altern Ther Health Med 2015; 15:55. [PMID: 25888276 PMCID: PMC4380248 DOI: 10.1186/s12906-015-0584-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 02/21/2015] [Indexed: 12/25/2022]
Abstract
BACKGROUND Tong Luo Jiu Nao (TLJN), a modern formula of Chinese medicine extracts on the basis of Traditional Chinese Medicine theory, has been used to treat dementia. The present study aimed to investigate its ameliorating effects on Aβ1-40-induced cognitive impairment in rats using a series of novel reward-directed instrumental learning (RDIL) tasks, and to determine its possible mechanism of action. METHODS Rats were pretreated with TLJN extract (0.9 and 1.8 g/kg, p.o.) for 10 daysbefore surgery, and were trained to gain reward reinforcement by lever pressing at the meantime. Thereafter, rats received a bilateral microinjection of Aβ1-40 in CA1 regions of the hippocampus. Cognitive performance was evaluated with the goal directed (higher response ratio) and habit (visual signal discrimination and extinction) learning tasks, as well as on the levels of biochemical parameters and molecules. RESULTS Our findings first demonstrated that TLJN can improve Aβ1-40-induced amnesia in RDIL via enhancing the comprehension of action-outcome association and the utilization of cue information to guide behavior. Then, its ameliorating effects should attribute to the modulation of ERK/CaMKII/CREB signaling in the hippocampus. CONCLUSION TLJN can markedly enhance cognitions of Aβ1-40 microinjection animal model in adaptive behavioral tasks. It has the potential, possibly as complementary and alternative therapy, to prevent and/or delay the deterioration of cognitive impairment in AD.
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Shi Z, Chen L, Li S, Chen S, Sun X, Sun L, Li Y, Zeng J, He Y, Liu X. Chronic scopolamine-injection-induced cognitive deficit on reward-directed instrumental learning in rat is associated with CREB signaling activity in the cerebral cortex and dorsal hippocampus. Psychopharmacology (Berl) 2013; 230:245-60. [PMID: 23722831 DOI: 10.1007/s00213-013-3149-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Accepted: 05/12/2013] [Indexed: 12/19/2022]
Abstract
RATIONALE Scopolamine, a nonselective muscarinic receptor antagonist, has been used in experimental animal models of dementia. It has been demonstrated to disrupt performances in a battery of behavioral tests. However, no attempt has been made to determine how scopolamine-treated animals would respond to a series of reward-directed instrumental learning (RDIL) tasks. OBJECTIVES The present study was designed to investigate the effects of chronic intraperitoneal injection of scopolamine in Wistar rats on RDIL, as well as on the expression of memory-related molecules in the dorsal hippocampus (DH) and cerebral cortex (CCx). METHODS The effects of the pretraining injection of scopolamine on the acquisition of instrumental response (experiment 1) were first investigated. Then, the effects of post-training manipulation on the maintenance of instrumental response and the responses to changes in contingency degradation and signal discrimination were assessed (experiment 2). Finally, the expression of cyclic AMP response element-binding protein (CREB), phosphorylated CREB, and brain-derived neurotrophic factor in the DH and CCx were examined using Western blotting and enzyme-linked immunosorbent assay. RESULTS The acquisition of instrumental conditioning is more vulnerable than its maintenance. The 3.0-mg/kg dose of scopolamine rendered rats unable to make adaptive changes in facing contingency degradation and correct responses in signal discrimination tasks. Furthermore, CREB signaling was inactivated by pretraining scopolamine treatment in both the DH and CCx. Nevertheless, this pathway was selectively suppressed by post-training treatment only in the CCx during memory reconsolidation. CONCLUSIONS The results suggest that scopolamine-induced cognitive deficits on RDIL are related to the distinguishing alteration of CREB signaling in the DH and CCx.
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Affiliation(s)
- Zhe Shi
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Malianwa North Road No. 151, Beijing, 100193, China
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12
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Zhang J, Zhen YF, Pu-Bu-Ci-Ren, Song LG, Kong WN, Shao TM, Li X, Chai XQ. Salidroside attenuates beta amyloid-induced cognitive deficits via modulating oxidative stress and inflammatory mediators in rat hippocampus. Behav Brain Res 2013; 244:70-81. [PMID: 23396166 DOI: 10.1016/j.bbr.2013.01.037] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 01/27/2013] [Accepted: 01/28/2013] [Indexed: 01/14/2023]
Abstract
Beta amyloid (Aβ)-induced oxidative stress and chronic inflammation in the brain are considered to be responsible for the pathogenesis of Alzheimer's disease (AD). Salidroside, the major active ingredient of Rhodiola crenulata, has been previously shown to have antioxidant and neuroprotective properties in vitro. The present study aimed to investigate the protective effects of salidroside on Aβ-induced cognitive impairment in vivo. Rats received intrahippocampal Aβ1-40 injection were treated with salidroside (25, 50 and 75 mg/kg p.o.) once daily for 21 days. Learning and memory performance were assessed in the Morris water maze (days 17-21). After behavioral testing, the rats were sacrificed and hippocampi were removed for biochemical assays (reactive oxygen species (ROS), superoxide dismutase (SOD), glutathione peroxidase (GPx), malondialdehyde (MDA), acetylcholinesterase (AChE), acetylcholine (ACh)) and molecular biological analysis (Cu/Zn-SOD, Mn-SOD, GPx, nicotinamide adenine dinucleotide phosphate (NADPH) oxidase, nuclear factor κB (NF-κB), inhibitor of κB-alpha (IκBα), cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), receptor for advanced glycation end products (RAGE)). Our results confirmed that Aβ1-40 peptide caused learning and memory deficits in rats. Further analysis demonstrated that the NADPH oxidase-mediated oxidative stress was increased in Aβ1-40-injected rats. Furthermore, NF-κB was demonstrated to be activated in Aβ1-40-injected rats, and the COX-2, iNOS and RAGE expression were also induced by Aβ1-40. However, salidroside (50 and 75 mg/kg p.o.) reversed all the former alterations. Thus, the study indicates that salidroside may have a protective effect against AD via modulating oxidative stress and inflammatory mediators.
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Affiliation(s)
- Jia Zhang
- Department of Neurology, The First Affiliated Hospital of Hebei Medical University, Shijiazhuang 050017, China.
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