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Zhao Y, Yang WQ, Yu L, Yang J, Zhu HR, Zhang L. Dl-3-n-butylphthalide alleviates cognitive impairment in amyloid precursor protein/presenilin 1 transgenic mice by regulating the striatal-enriched protein tyrosine phosphatase/ERK/ cAMP-response element-binding protein signaling pathway. Exp Ther Med 2022; 23:319. [PMID: 35350668 PMCID: PMC8943801 DOI: 10.3892/etm.2022.11248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 01/04/2022] [Indexed: 12/27/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by cognitive impairment and the deposition of amyloid plaques in the brain. In a transgenic mouse model of AD, cognitive impairment and synaptic dysfunction were revealed to be associated with soluble amyloid oligomers and to occur prior to plaque formation. The results of our previous studies revealed that striatal-enriched protein tyrosine phosphatase (STEP)61 negatively regulated the β-amyloid protein-mediated ERK/cAMP-response element-binding protein (CREB) signaling pathway. Dl-3-n-butylphthalide (NBP) is a synthetic compound approved by the Food and Drug Administration of China for the treatment of ischemic stroke in 2002. Studies have shown that the neuroprotective effects of NBP involve multiple mechanisms. The present study further explored the mechanism of NBP therapy in amyloid precursor protein (APP)/presenilin 1 (PS1) transgenic mice, and the involvement of the STEP/ERK/CREB signaling pathway. The results suggested that NBP treatment effectively ameliorated the spatial learning and memory impairment of the APP/PS1 transgenic mice, which was assessed using a Morris water maze. In addition, NBP reduced amyloid-induced activation of STEP61 levels, while increasing phosphorylated (p)-ERK1/2 and p-CREB levels in the cerebral cortex and hippocampus of APP/PS1 transgenic mice by western blotting and immunostaining. In conclusion, the present study provided evidence to suggest that the new drug NBP improved amyloid-induced learning and memory deficits, likely through the regulation of the STEP/ERK/CREB pathway. The results revealed that NBP, as a multi-target drug, may exert a neuroprotective effect. Therefore, NBP may serve as an effective treatment for AD.
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Affiliation(s)
- Yan Zhao
- Life Science Institution, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Wen-Qiang Yang
- Life Science Institution, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Lu Yu
- Provincial Key Laboratory of Cardiovascular and Cerebrovascular Drug Basic Research, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Jing Yang
- Provincial Key Laboratory of Cardiovascular and Cerebrovascular Drug Basic Research, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Hai-Rong Zhu
- Department of Neurology, Affiliated Taizhou Hospital of Nanjing University of Chinese Medicine, Taizhou, Jiangsu 225300, P.R. China
| | - Lin Zhang
- Department of Neurology, Affiliated Wenling Hospital of Wenzhou Medical University, Wenling, Zhejiang 317500, P.R. China,Correspondence to: Dr Lin Zhang, Department of Neurology, Affiliated Wenling Hospital of Wenzhou Medical University, 333 Chuan'an South Road, Chengxi Street, Wenling, Zhejiang 317500, P.R. China
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Zeng L, Jiang H, Ashraf GM, Liu J, Wang L, Zhao K, Liu M, Li Z, Liu R. Implications of miR-148a-3p/p35/PTEN signaling in tau hyperphosphorylation and autoregulatory feedforward of Akt/CREB in Alzheimer's disease. Mol Ther Nucleic Acids 2022; 27:256-275. [PMID: 35024240 PMCID: PMC8714918 DOI: 10.1016/j.omtn.2021.11.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 11/28/2021] [Indexed: 11/21/2022]
Abstract
Existing studies have revealed that microRNAs (miRNAs) have a role in cognitive deficits in Alzheimer's disease (AD). However, the function and pathophysiological mechanism of deregulated miRNAs underlying AD pathology remain to be investigated. The present study aimed to clarify the role and mechanism of miR-148a-3p in AD. RNA sequencing, qRT-PCR, and western blot analysis were used to identify the aberrant expression and signaling of miR-148a-3p within cells, mice, and patients with AD. Molecular biology techniques involving luciferase reporter assays, gene overexpression and silencing, chromatin immunoprecipitation, and adeno-associated virus-based miRNA overexpression were used to explore the biological function and mechanisms of miR-148a-3p. Downregulation of miR-148a-3p was identified in AD. Upregulation of miR-148a-3p was found to protect neuronal cells against Aβ-associated tau hyperphosphorylation by directly targeting p35/CDK5 and PTEN/p38 mitogen-activated protein kinase (MAPK) pathways. A mutual regulatory link between miR-148a-3p and PTEN using a feedforward arrangement was confirmed via promotion of transcription and expression of miR-148a-3p by way of the PTEN/Akt/CREB pathway. Significantly, in vivo targeting of miR-148a-3p signaling ameliorated cognitive deficits by decreasing p35/PTEN-elicited tau hyperphosphorylation, accompanied by feedforward transduction of the PTEN/Akt/CREB pathway. In conclusion, the present study implicated the miR-148a-3p/p35/PTEN pathway as an essential contributor to tau hyperphosphorylation and feedforward regulation in AD.
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Affiliation(s)
- Li Zeng
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
| | - Hailun Jiang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
| | - Ghulam Md Ashraf
- Pre-Clinical Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Jianghong Liu
- Department of Neurology, Xuan Wu Hospital, Capital Medical University, Beijing 100053, PR China
| | - Linlin Wang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
| | - Kaiyue Zhao
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
| | - Mimin Liu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
| | - Zhuorong Li
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
| | - Rui Liu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
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Ma CL, Li L, Yang GM, Zhang ZB, Zhao YN, Zeng XF, Zhang DX, Yu Y, Shi ZJ, Yan QW, Li LH, Hong SJ. Neuroprotective effect of gastrodin in methamphetamine-induced apoptosis through regulating cAMP/PKA/CREB pathway in cortical neuron. Hum Exp Toxicol 2020; 39:1118-1129. [PMID: 32162539 DOI: 10.1177/0960327120911438] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Methamphetamine (MA) abuse induces neurotoxicity and causes neuronal cell apoptosis. Gastrodin is a traditional Chinese herbal medicine used for the treatment of nerve injuries, spinal cord injuries, and some central nervous system diseases as well. The present study investigated the neuroprotective effects of gastrodin against MA-induced neurotoxicity in neuronal cells and its potential protective mechanism. METHODS The primary cortex neuronal culture was divided into four groups (control group, MA group, MA + gastrodin group, and MA + gastrodin + small interfering RNA group). The neurotoxicity of MA was assessed by detecting apoptotic cells by terminal deoxynucleotidyl transferase deoxyuridine triphosphate nick-end labeling assay and cell viability by cell counting kit 8 (CCK-8) method, the Tuj1-positive cells and the average axonal length were detected by immunofluorescence, and the expressions of cyclic adenosine monophosphate (cAMP), protein kinase A (PKA), cAMP-response element-binding (CREB), and brain-derived neurotrophic factor (BDNF) proteins were detected by Western blot. RESULTS The results of CCK-8 assay showed that 0.5 mM MA was an optimal concentration that induced neurotoxicity (p < 0.01). Pretreatment with 25 mg/L gastrodin exerted maximum protective effects on neuronal cells. The expression levels of cAMP, PKA, phosphorylated PKA, CREB, phosphorylated CREB, and BDNF proteins were decreased in the MA group, and pretreatment with gastrodin upregulated the expression levels of these proteins (p < 0.01). The expressions of PKA and CREB proteins showed no significant changes in the control group, MA group, and gastrodin group. Compared the MA + gastrodin + small interfering RNA group with MA + gastrodin group, the Tuj1-positive cells and the average axonal length were decreased significantly, while the number of apoptotic cells was increased (p < 0.05). CONCLUSION Gastrodin has neuroprotective effects against MA-induced neurotoxicity, which exerts neuroprotective effects via regulation of cAMP/PKA/CREB signaling pathway and upregulates the expression of BDNF.
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Affiliation(s)
- C-L Ma
- The School of Forensic Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - L Li
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, Guangzhou, People's Republic of China
| | - G-M Yang
- The School of Forensic Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - Z-B Zhang
- Department of Anesthesiology, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China
- Department of Laboratory Animal, School of Basic Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - Y-N Zhao
- School of International Education, Kunming Medical University, Kunming, People's Republic of China
| | - X-F Zeng
- The School of Forensic Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - D-X Zhang
- The School of Forensic Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - Y Yu
- School of Basic Medical Sciences, Kunming Medical University, Kunming, People's Republic of China
| | - Z-J Shi
- The School of Forensic Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - Q-W Yan
- The School of Forensic Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - L-H Li
- The School of Forensic Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - S-J Hong
- The School of Forensic Medicine, Kunming Medical University, Kunming, People's Republic of China
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Fu YX, Wang FM, Ou-Yang XE, Yang HM, Hu T, Wang YF, Wang YF, Wang H, Hu R. Anti-Müllerian Hormone Regulates Stem Cell Factor via cAMP/PKA Signaling Pathway in Human Granulosa Cells by Inhibiting the Phosphorylation of CREB. Reprod Sci 2020; 27:325-333. [PMID: 32046389 DOI: 10.1007/s43032-019-00033-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 04/03/2019] [Indexed: 10/25/2022]
Abstract
Anti-Müllerian hormone (AMH) downregulates the level of stem cell factor (SCF) via the cAMP/PKA signaling pathway in human granulosa cells (GCs). Little information is available on the molecular mechanism underlying the interaction. This study is aimed at determining whether AMH regulates expression of SCF via the cAMP-PKA-CREB signaling pathway in human GCs. In the present study, we verified the binding of cAMP-response element-binding protein (CREB) to promoter of SCF in human GCs. Furthermore, the effect of CREB was tested on the SCF promoter, and the site of CREB binding to SCF promoter was identified using truncations as well as assays of SCF-promoted mutation and CREB mutation. To investigate the correlation among AMH, SCF promoter, and CREB, pGL-Basic-SCF+CREB was transfected into overexpressed AMH GCs (AMH-high GCs), low expressed AMH GCs (AMH-low GCs), and normal GCs (GCs), respectively. Finally, immunofluorescence, double immunostaining, and Western blot were carried out in AMH-high and AMH-low GCs to confirm the AMH-mediated regulation of SCF expression by inhibiting the phosphorylation of CREB (pCREB) in GCs. Results indicated CREB interacted with SCF promoter and significantly enhanced the transcription level of SCF. The CREB binding site was localized at 318-321 bp of SCF gene promote. AMH inhibits the expression of SCF by phosphorylation of CREB via the PKA signaling pathway in GCs. These findings provide an in-depth understanding of the molecular mechanism underlying AMH suppressing the follicle growth, which would aid in the development of a novel therapy.
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Affiliation(s)
- Yun-Xing Fu
- Ningxia Medical University, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Fei-Miao Wang
- Reproductive Medicine Center, General Hospital of Ningxia Medical University, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | | | - Hui-Min Yang
- Ningxia Medical University, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Ting Hu
- Ningxia Medical University, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Ya-Fei Wang
- Ningxia Medical University, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Yan-Fei Wang
- Ningxia Medical University, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Hui Wang
- Ningxia Medical University, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Rong Hu
- Reproductive Medicine Center, General Hospital of Ningxia Medical University, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Ningxia Medical University, Yinchuan, 750004, Ningxia, China.
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Li P, Zhou C, Li X, Yu M, Li M, Gao X. CRTC2 Is a Key Mediator of Amino Acid-Induced Milk Fat Synthesis in Mammary Epithelial Cells. J Agric Food Chem 2019; 67:10513-10520. [PMID: 31475823 DOI: 10.1021/acs.jafc.9b04648] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Amino acids can stimulate milk fat synthesis, but the underlying molecular mechanism is still largely unknown. In this study, we studied the regulatory role and corresponding molecular mechanism of cAMP response element-binding protein-regulated transcription coactivator 2 (CRTC2) in amino acid-induced milk fat synthesis in mammary epithelial cells. We showed that leucine and methionine stimulated CRTC2 but not p-CRTC2(Ser171) expression and nuclear localization in cow mammary epithelial cells. Knockdown of CRTC2 decreased milk fat synthesis and sterol regulatory element binding protein 1c (SREBP-1c) expression and activation, whereas its overexpression had the opposite effects. Neither knockdown nor overexpression of CRTC2 affected β-casein synthesis and phosphorylation of the machanistic target of rapamycin (mTOR), suggesting that CRTC2 only regulates milk fat synthesis. CRTC2 knockdown abolished the stimulation of leucine and methionine on SREBP-1c expression and activation. Knockdown or overexpression of CRTC2 did not affect the protein level of cAMP-response element-binding protein (CREB) and its phosphorylation but decreased or increased the binding of p-CREB to the promoter of SREBP-1c gene and its mRNA expression, respectively. Mutation of Ser171 of CRTC2 did not alter the stimulation of CRTC2 on SREBP-1c expression and activation, further suggesting that CRTC2 functions in the nucleus. mTOR inhibition by rapamycin totally blocked the stimulation of leucine and methionine on CRTC2 expression. The expression of CRTC2 was dramatically higher in the mouse mammary gland of lactation period, compared with that of the dry and puberty periods, whereas p-CRTC2(Ser171) was not changed, further supporting that CRTC2 is a key transcription coactivator for milk fat synthesis. These results uncover that CRTC2 is a key transcription coactivator of amino acid-stimulated mTOR-mediated milk fat synthesis in mammary epithelial cells.
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Affiliation(s)
- Ping Li
- School of Animal Science , Yangtze University , Jingzhou 434020 , China
| | - Chengjian Zhou
- The Key Laboratory of Dairy Science of Education Ministry , Northeast Agricultural University , Harbin 150030 , China
| | - Xueying Li
- The Key Laboratory of Dairy Science of Education Ministry , Northeast Agricultural University , Harbin 150030 , China
| | - Mengmeng Yu
- The Key Laboratory of Dairy Science of Education Ministry , Northeast Agricultural University , Harbin 150030 , China
| | - Meng Li
- The Key Laboratory of Dairy Science of Education Ministry , Northeast Agricultural University , Harbin 150030 , China
| | - Xuejun Gao
- School of Animal Science , Yangtze University , Jingzhou 434020 , China
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Lee B, Shim I, Lee H, Hahm DH. Melatonin ameliorates cognitive memory by regulation of cAMP-response element-binding protein expression and the anti-inflammatory response in a rat model of post-traumatic stress disorder. BMC Neurosci 2018; 19:38. [PMID: 29973144 PMCID: PMC6032787 DOI: 10.1186/s12868-018-0439-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 06/28/2018] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Post-traumatic stress disorder (PTSD) is an important psychological disease that can develop following the physical experience or witnessing of traumatic events. The psychopathological response to traumatic stressors increases inflammation in the hippocampus and induces memory deficits. Melatonin (MTG) plays critical roles in circadian rhythm disorders, Alzheimer's disease, and other neurological disorders. However, the cognitive efficiency of MTG and its mechanisms of action in the treatment of PTSD remain unclear. Thus, the present study investigated the effects of MTG on spatial cognitive impairments stimulated by single prolonged stress (SPS) in rats, an animal model of PTSD. Male rats received intraperitoneal (i.p.) administration of various doses of MTG for 21 consecutive days after the SPS procedure. RESULTS SPS-stimulated cognitive impairments in the object recognition task and Morris water maze were reversed by MTG treatment (25 mg/kg, i.p). Additionally, MTG significantly increased cognitive memory-related decreases in cAMP-response element-binding (CREB) protein and mRNA levels in the hippocampus. Our results also demonstrate that MTG significantly inhibited SPS-stimulated cognitive memory impairments by inhibiting the expression of proinflammatory cytokines, including tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6) in the rat brain. CONCLUSION The present results indicate that MTG can be beneficial for SPS-stimulated memory impairments via changes in CREB expression and proinflammatory mediators. Thus, MTG may be a prophylactic strategy for the prevention or mitigation of the progression of some features of the PTSD pathology.
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Affiliation(s)
- Bombi Lee
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447 Republic of Korea
- Center for Converging Humanities, Kyung Hee University, Seoul, 02447 Republic of Korea
| | - Insop Shim
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447 Republic of Korea
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul, 02447 Republic of Korea
| | - Hyejung Lee
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447 Republic of Korea
| | - Dae-Hyun Hahm
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447 Republic of Korea
- Center for Converging Humanities, Kyung Hee University, Seoul, 02447 Republic of Korea
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Lee B, Sur B, Cho SG, Yeom M, Shim I, Lee H, Hahm DH. Wogonin Attenuates Hippocampal Neuronal Loss and Cognitive Dysfunction in Trimethyltin-Intoxicated Rats. Biomol Ther (Seoul) 2016; 24:328-37. [PMID: 27133262 PMCID: PMC4859797 DOI: 10.4062/biomolther.2015.152] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 01/06/2016] [Accepted: 02/12/2016] [Indexed: 11/11/2022] Open
Abstract
We examined whether wogonin (WO) improved hippocampal neuronal activity, behavioral alterations and cognitive impairment, in rats induced by administration of trimethyltin (TMT), an organotin compound that is neurotoxic to these animals. The ability of WO to improve cognitive efficacy in the TMT-induced neurodegenerative rats was investigated using a passive avoidance test, and the Morris water maze test, and using immunohistochemistry to detect components of the acetylcholinergic system, brain-derived neurotrophic factor (BDNF), and cAMP-response element-binding protein (CREB) expression. Rats injected with TMT showed impairments in learning and memory and daily administration of WO improved memory function, and reduced aggressive behavior. Administration of WO significantly alleviated the TMT-induced loss of cholinergic immunoreactivity and restored the hippocampal expression levels of BDNF and CREB proteins and their encoding mRNAs to normal levels. These findings suggest that WO might be useful as a new therapy for treatment of various neurodegenerative diseases.
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Affiliation(s)
- Bombi Lee
- Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Bongjun Sur
- Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Seong-Guk Cho
- The Graduate School of Basic Science of Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Mijung Yeom
- Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Insop Shim
- Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul 02447, Republic of Korea.,The Graduate School of Basic Science of Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Hyejung Lee
- Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Dae-Hyun Hahm
- Acupuncture and Meridian Science Research Center, Kyung Hee University, Seoul 02447, Republic of Korea.,The Graduate School of Basic Science of Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
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Lee B, Sur B, Cho SG, Yeom M, Shim I, Lee H, Hahm DH. Effect of Beta-Asarone on Impairment of Spatial Working Memory and Apoptosis in the Hippocampus of Rats Exposed to Chronic Corticosterone Administration. Biomol Ther (Seoul) 2015; 23:571-81. [PMID: 26535083 PMCID: PMC4624074 DOI: 10.4062/biomolther.2015.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 08/11/2015] [Accepted: 08/12/2015] [Indexed: 02/02/2023] Open
Abstract
β-asarone (BAS) is an active component of Acori graminei rhizoma, a traditional medicine used clinically in treating dementia and chronic stress in Korea. However, the cognitive effects of BAS and its mechanism of action have remained elusive. The purpose of this study was to examine whether BAS improved spatial cognitive impairment induced in rats following chronic corticosterone (CORT) administration. CORT administration (40 mg/kg, i.p., 21 days) resulted in cognitive impairment in the avoidance conditioning test (AAT) and the Morris water maze (MWM) test that was reversed by BAS (200 mg/kg, i.p). Additionally, as assessed by immunohistochemistry and RT-PCR analysis, the administration of BAS significantly alleviated memory-associated decreases in the expression levels of brain-derived neurotrophic factor (BDNF) and cAMP-response element-binding protein (CREB) proteins and mRNAs in the hippocampus. Also, BAS administration significantly restored the expression of Bax and Bcl-2 mRNAs in the hippocampus. Thus, BAS may be an effective therapeutic for learning and memory disturbances, and its neuroprotective effect was mediated, in part, by normalizing the CORT response, resulting in regulation of BDNF and CREB functions and anti-apoptosis in rats.
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Affiliation(s)
- Bombi Lee
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
| | - Bongjun Sur
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
| | - Seong-Guk Cho
- The Graduate School of Basic Science of Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
| | - Mijung Yeom
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
| | - Insop Shim
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
- The Graduate School of Basic Science of Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
| | - Hyejung Lee
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
- The Graduate School of Basic Science of Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
| | - Dae-Hyun Hahm
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
- The Graduate School of Basic Science of Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 02447,
Republic of Korea
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Abstract
Toxicity induced by aberrant protein aggregates in Alzheimer’s disease (AD) causes synaptic disconnection and concomitant progressive neurodegeneration that eventually impair cognitive function. cAMP-response element-binding protein (CREB) is a transcription factor involved in the molecular switch that converts short-term to long-term memory. Although disturbances in CREB function have been suggested to cause memory deficits in both AD and AD animal models, the mechanism of CREB dysfunction is still unclear. Here, we show that the dopamine- and cAMP-regulated phosphoprotein 32 kDa (DARPP-32), a key inhibitor of protein phosphate-1 (PP-1) that regulates CREB phosphorylation, is cleaved by activated calpain in both AD brains and neuronal cells treated with amyloid-β or okadaic acid, a protein phosphatase-2A inhibitor that induces tau hyperphosphorylation and neuronal death. We found that DARPP-32 is mainly cleaved at Thr153 by calpain and that this cleavage of DARPP-32 reduces CREB phosphorylation via loss of its inhibitory function on PP1. Our results suggest a novel mechanism of DARPP-32–CREB signalling dysregulation in AD.
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Affiliation(s)
- Kwangmin Cho
- Alzheimer's Disease Experts Lab (ADEL) Asan Medical Center University of Ulsan College of MedicineSeoul Korea
- Department of Brain ScienceUniversity of Ulsan College of Medicine Seoul Korea
- Bio‐Medical Institute of Technology (BMIT)University of Ulsan College of Medicine Seoul Korea
- Cell Dysfunction Research Center (CDRC) University of Ulsan College of Medicine Seoul Korea
| | - Mi‐Hyang Cho
- Alzheimer's Disease Experts Lab (ADEL) Asan Medical Center University of Ulsan College of MedicineSeoul Korea
- Department of Brain ScienceUniversity of Ulsan College of Medicine Seoul Korea
- Bio‐Medical Institute of Technology (BMIT)University of Ulsan College of Medicine Seoul Korea
- Cell Dysfunction Research Center (CDRC) University of Ulsan College of Medicine Seoul Korea
| | - Jung‐Han Seo
- Department of Brain ScienceUniversity of Ulsan College of Medicine Seoul Korea
- Cell Dysfunction Research Center (CDRC) University of Ulsan College of Medicine Seoul Korea
| | - Jongjin Peak
- Alzheimer's Disease Experts Lab (ADEL) Asan Medical Center University of Ulsan College of MedicineSeoul Korea
- Department of Brain ScienceUniversity of Ulsan College of Medicine Seoul Korea
- Bio‐Medical Institute of Technology (BMIT)University of Ulsan College of Medicine Seoul Korea
- Cell Dysfunction Research Center (CDRC) University of Ulsan College of Medicine Seoul Korea
| | - Kyoung‐Hye Kong
- Alzheimer's Disease Experts Lab (ADEL) Asan Medical Center University of Ulsan College of MedicineSeoul Korea
- Department of Brain ScienceUniversity of Ulsan College of Medicine Seoul Korea
- Bio‐Medical Institute of Technology (BMIT)University of Ulsan College of Medicine Seoul Korea
- Cell Dysfunction Research Center (CDRC) University of Ulsan College of Medicine Seoul Korea
| | - Seung‐Yong Yoon
- Alzheimer's Disease Experts Lab (ADEL) Asan Medical Center University of Ulsan College of MedicineSeoul Korea
- Department of Brain ScienceUniversity of Ulsan College of Medicine Seoul Korea
- Bio‐Medical Institute of Technology (BMIT)University of Ulsan College of Medicine Seoul Korea
- Cell Dysfunction Research Center (CDRC) University of Ulsan College of Medicine Seoul Korea
| | - Dong‐Hou Kim
- Alzheimer's Disease Experts Lab (ADEL) Asan Medical Center University of Ulsan College of MedicineSeoul Korea
- Department of Brain ScienceUniversity of Ulsan College of Medicine Seoul Korea
- Bio‐Medical Institute of Technology (BMIT)University of Ulsan College of Medicine Seoul Korea
- Cell Dysfunction Research Center (CDRC) University of Ulsan College of Medicine Seoul Korea
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Zhou X, Li J, Yang W. Calcium/calmodulin-dependent protein kinase II regulates cyclooxygenase-2 expression and prostaglandin E2 production by activating cAMP-response element-binding protein in rat peritoneal macrophages. Immunology 2014; 143:287-99. [PMID: 24773364 DOI: 10.1111/imm.12309] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 04/19/2014] [Accepted: 04/24/2014] [Indexed: 12/17/2022] Open
Abstract
Prostaglandin E2 (PGE2 ) is an important inducer of inflammation, which is also closely linked to the progress of tumours. In macrophages, PGE2 production is regulated by arachidonic acid release and cyclooxygenase-2 (COX-2) expression. In the present study, we found that COX-2 expression can be achieved by activating Ca(2+) /Calmodulin (CaM)-dependent protein kinase II (CaMKII) and cAMP-response element-binding protein (CREB) in rat peritoneal macrophages. Our results indicated that lipopolysaccharide and PMA could elicit the transient increase of the concentration of intracellular free calcium ions ([Ca(2+) ]i ), which induced activation of CaMKs with the presence of CaM. The subtype of CaMKs, CaMKII, then triggered the activation of CREB, which elevated COX-2 expression and PGE2 production in a chronological order. These results suggested that Ca(2+) /CaM-dependent CaMKII plays an important role in mediating COX-2 expression and PGE2 production by activating CREB in macrophages. The study also provides more useful information to clarify the mechanism of calcium regulation of PGE2 production, which plays an essential role in inflammation and cancers.
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Affiliation(s)
- Xueyuan Zhou
- Department of Biophysics, School of Physics, Nankai University, Tianjin, China; Clinic Service Program, Leidos Biomedical Research Inc., Frederick, MD, USA
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Castorina A, D'Amico AG, Scuderi S, Leggio GM, Drago F, D'Agata V. Dopamine D3 receptor deletion increases tissue plasminogen activator (tPA) activity in prefrontal cortex and hippocampus. Neuroscience 2013; 250:546-56. [PMID: 23906635 DOI: 10.1016/j.neuroscience.2013.07.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 07/01/2013] [Accepted: 07/18/2013] [Indexed: 11/16/2022]
Abstract
Considerable evidence indicates that dopamine (DA) influences tissue plasminogen activator (tPA)-mediated proteolytic processing of the precursor of brain-derived neurotrophic factor (proBDNF) into mature BDNF (mBDNF). However, specific roles in this process for the dopamine D3 receptor (D3R) and the underlying molecular mechanisms are yet to be fully characterized. In the present study, we hypothesized that D3R deletion could influence tPA activity in the prefrontal cortex and hippocampus. Using D3R knockout (D3(-/-)) mice, we show that receptor inactivation is associated with increased tPA expression/activity both in the prefrontal cortex and, to a greater extent, in the hippocampus. Augmented tPA expression in D3(-/-) mice correlated with increased BDNF mRNA levels, plasmin/plasminogen protein ratio and the conversion of proBDNF into mBDNF, as well as enhanced tPA and mBDNF immunoreactivity, as determined by quantitative real time polymerase chain reaction (qRT-PCR), immunoblot and immunohistochemistry. In addition, when compared to wild-type controls, D3(-/-) mice exhibited increased basal activation of the canonical cyclic adenosine monophosphate (cAMP)/protein kinase A (PKA)-driven Akt/cAMP-response element-binding protein (CREB) signaling cascade, as determined by the increased Akt phosphorylation both at Thr304 and Ser473 residues, of DA and cAMP-regulated protein of 32kDa (DARPP-32) at Thr34 and a phosphorylation state-dependent inhibition of glycogen synthetase kinase-3β (GSK-3β) at Ser9, a substrate of Akt whose constitutive function impairs normal CREB transcriptional activity through phosphorylation at its Ser129 residue. Accordingly, CREB phosphorylation at Ser133 was significantly increased in D3(-/-) mice, whereas the GSK-3β-dependent phosphorylation at Ser129 was diminished. Altogether, our finding reveals that mice lacking D3Rs show enhanced tPA proteolytic activity on BDNF which may involve, at least in part, a potentiated Akt/CREB signaling, possibly due to hindered GSK-3β activity.
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Affiliation(s)
- A Castorina
- Department of Bio-Medical Sciences, Section of Anatomy and Histology, University of Catania, Italy.
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Leal G, Comprido D, Duarte CB. BDNF-induced local protein synthesis and synaptic plasticity. Neuropharmacology 2013; 76 Pt C:639-56. [PMID: 23602987 DOI: 10.1016/j.neuropharm.2013.04.005] [Citation(s) in RCA: 416] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Revised: 03/25/2013] [Accepted: 04/03/2013] [Indexed: 12/16/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) is an important regulator of synaptic transmission and long-term potentiation (LTP) in the hippocampus and in other brain regions, playing a role in the formation of certain forms of memory. The effects of BDNF in LTP are mediated by TrkB (tropomyosin-related kinase B) receptors, which are known to be coupled to the activation of the Ras/ERK, phosphatidylinositol 3-kinase/Akt and phospholipase C-γ (PLC-γ) pathways. The role of BDNF in LTP is best studied in the hippocampus, where the neurotrophin acts at pre- and post-synaptic levels. Recent studies have shown that BDNF regulates the transport of mRNAs along dendrites and their translation at the synapse, by modulating the initiation and elongation phases of protein synthesis, and by acting on specific miRNAs. Furthermore, the effect of BDNF on transcription regulation may further contribute to long-term changes in the synaptic proteome. In this review we discuss the recent progress in understanding the mechanisms contributing to the short- and long-term regulation of the synaptic proteome by BDNF, and the role in synaptic plasticity, which is likely to influence learning and memory formation. This article is part of the Special Issue entitled 'BDNF Regulation of Synaptic Structure, Function, and Plasticity'.
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Affiliation(s)
- Graciano Leal
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal; Department of Life Sciences, University of Coimbra, 3004-517 Coimbra, Portugal
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