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Rafa-Zabłocka K, Zelek-Molik A, Tepper B, Chmielarz P, Kreiner G, Wilczkowski M, Nalepa I. Chronic restraint stress induces changes in the cerebral Galpha 12/13 and Rho-GTPase signaling network. Pharmacol Rep 2021; 73:1179-1187. [PMID: 34117630 PMCID: PMC8413188 DOI: 10.1007/s43440-021-00294-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 11/24/2022]
Abstract
Background Evidence indicates that Gα12, Gα13, and its downstream effectors, RhoA and Rac1, regulate neuronal morphology affected by stress. This study was aimed at investigating whether repeated stress influences the expression of proteins related to the Gα12/13 intracellular signaling pathway in selected brain regions sensitive to the effects of stress. Furthermore, the therapeutic impact of β(1)adrenergic receptors (β1AR) blockade was assessed. Methods Restraint stress (RS) model in mice (2 h/14 days) was used to assess prolonged stress effects on the mRNA expression of Gα12, Gα13, RhoA, Rac1 in the prefrontal cortex (PFC), hippocampus (HIP) and amygdala (AMY). In a separate study, applying RS model in rats (3–4 h/1 day or 14 days), we evaluated stress effects on the expression of Gα12, Gα11, Gαq, RhoA, RhoB, RhoC, Rac1/2/3 in the HIP. Betaxolol (BET), a selective β1AR antagonist, was introduced (5 mg/kg/p.o./8–14 days) in the rat RS model to assess the role of β1AR in stress effects. RT-qPCR and Western Blot were used for mRNA and protein assessments, respectively. Results Chronic RS decreased mRNA expression of Gα12 and increased mRNA for Rac1 in the PFC of mice. In the mice AMY, decreased mRNA expression of Gα12, Gα13 and RhoA was observed. Fourteen days of RS exposure increased RhoA protein level in the rats’ HIP in the manner dependent on β1AR activity. Conclusions Together, these results suggest that repeated RS affects the expression of genes and proteins known to be engaged in neural plasticity, providing potential targets for further studies aimed at unraveling the molecular mechanisms of stress-related neuropsychiatric diseases. ![]()
Supplementary Information The online version contains supplementary material available at 10.1007/s43440-021-00294-4.
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Affiliation(s)
- Katarzyna Rafa-Zabłocka
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Agnieszka Zelek-Molik
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Beata Tepper
- Laboratory of Calcium Binding Proteins, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Pasteura 3, 02-093, Warsaw, Poland
| | - Piotr Chmielarz
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Grzegorz Kreiner
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Michał Wilczkowski
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Irena Nalepa
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland.
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Chen L, Liu K, Wang Y, Liu N, Yao M, Hu J, Wang G, Sun Y, Pan J. Phosphodiesterase-2 inhibitor reverses post-traumatic stress induced fear memory deficits and behavioral changes via cAMP/cGMP pathway. Eur J Pharmacol 2021; 891:173768. [PMID: 33271150 DOI: 10.1016/j.ejphar.2020.173768] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 01/28/2023]
Abstract
Phosphodiesterase 2 is one of the phosphodiesterase (PDEs) family members that regulate cyclic nucleotide (namely cAMP and cGMP) concentrations. The present study determined whether PDE2 inhibition could rescue post-traumatic stress disorder (PTSD)-like symptoms. Mice were subjected to single prolonged stress (SPS) and treated with selective PDE2 inhibitor Bay 60-7550 (0.3, 1, or 3 mg/kg, i.p.). The behavioral tests such as forced swimming, sucrose preference test, open field, elevated plus maze, and contextual fear paradigm were conducted to determine the effects of Bay 60-7550 on SPS-induced depression- and anxiety-like behavior and fear memory deficits. The results suggested that Bay 60-7550 reversed SPS-induced depression- and anxiety-like behavior and fear memory deficits. Moreover, Bay 60-7550 prevented SPS-induced changes in the adrenal gland index, synaptic proteins synaptophysin and PSD95 expression, PKA, PKG, pCREB, and BDNF levels in the hippocampus and amygdala. These effects were completely prevented by PKG inhibitor KT5823. While PKA inhibitor H89 also prevented Bay 60-7550-induced pCREB and BDNF expression, but only partially prevented the effects on PSD95 expression in the hippocampus. These findings suggest that Bay 60-7550 protects mice against PTSD-like stress induced traumatic injury by activation of cGMP- or cAMP-related neuroprotective molecules, such as synaptic proteins, pCREB and BDNF.
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Affiliation(s)
- Ling Chen
- Department of Clinical Pharmacology, Key Laboratory of Clinical Cancer Pharmacology and Toxicology Research of Zhejiang Province, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310006, PR China; Brain Institute, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Kaiping Liu
- Brain Institute, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Yulu Wang
- College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Na Liu
- Department of Traditional Medical Orthopedics, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shanxi, China
| | - Minjie Yao
- Department of Orthopedics, The People's Hospital of Yichun City, Yichun, Jiangxi Province, China
| | - Jinlan Hu
- Department of Anesthesiology, Shanghai Minhang TCM Hospital, Shanghai, China
| | - Gang Wang
- Department of Clinical Pharmacology, Key Laboratory of Clinical Cancer Pharmacology and Toxicology Research of Zhejiang Province, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310006, PR China.
| | - Yindi Sun
- Department of Traditional Medical Orthopedics, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shanxi, China.
| | - Jianchun Pan
- Brain Institute, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang Province, China.
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Liu B, Chu S, Liu T, Song J, Ma Z, Gu X, Xia T. Effects of 5-HT7 receptors on circadian rhythm of mice anesthetized with isoflurane. Chronobiol Int 2020; 38:38-45. [PMID: 33081564 DOI: 10.1080/07420528.2020.1832111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The role of the serotonin 7 receptor (5-HT7 receptor) subtype in a number of domains has been widely recognized, but its role in the regulation of changes of the circadian rhythm after anesthesia is still unclear. We used intraperitoneal injection of 5-HT7 receptor agonist LP-211 or antagonist SB-269970 in mice to influence the level of 5-HT7 receptor protein in the SCN and to observe the role of this receptor on circadian rhythm changes after isoflurane anesthesia. Our results show the appropriate dose of SB-269970 significantly alleviated the circadian rhythm disorder induced by isoflurane anesthesia, while LP-211 significantly aggravated it after anesthesia, which is different from the phase shift that can be caused by the administration of LP-211 before anesthesia. These findings may indicate the 5-HT7 receptor plays a complex role in the regulation of circadian rhythm after anesthesia. Our findings may provide some positive significance for alleviating circadian rhythm disorder in patients after anesthesia and ultimately promoting rapid postoperative recovery.
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Affiliation(s)
- Binwen Liu
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School , Nanjing, Jiangsu, PR China
| | - Shuaishuai Chu
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School , Nanjing, Jiangsu, PR China
| | - Tiantian Liu
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School , Nanjing, Jiangsu, PR China
| | - Jia Song
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School , Nanjing, Jiangsu, PR China
| | - Zhengliang Ma
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School , Nanjing, Jiangsu, PR China
| | - Xiaoping Gu
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School , Nanjing, Jiangsu, PR China
| | - Tianjiao Xia
- Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School , Nanjing, Jiangsu, PR China.,Jiangsu Key Laboratory of Molecular Medicine, Nanjing University , Nanjing, PR China
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Rho GTPases in the Amygdala-A Switch for Fears? Cells 2020; 9:cells9091972. [PMID: 32858950 PMCID: PMC7563696 DOI: 10.3390/cells9091972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/22/2020] [Accepted: 08/25/2020] [Indexed: 12/28/2022] Open
Abstract
Fear is a fundamental evolutionary process for survival. However, excess or irrational fear hampers normal activity and leads to phobia. The amygdala is the primary brain region associated with fear learning and conditioning. There, Rho GTPases are molecular switches that act as signaling molecules for further downstream processes that modulate, among others, dendritic spine morphogenesis and thereby play a role in fear conditioning. The three main Rho GTPases—RhoA, Rac1, and Cdc42, together with their modulators, are known to be involved in many psychiatric disorders that affect the amygdala′s fear conditioning mechanism. Rich2, a RhoGAP mainly for Rac1 and Cdc42, has been studied extensively in such regard. Here, we will discuss these effectors, along with Rich2, as a molecular switch for fears, especially in the amygdala. Understanding the role of Rho GTPases in fear controlling could be beneficial for the development of therapeutic strategies targeting conditions with abnormal fear/anxiety-like behaviors.
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Cultured hippocampal neurons of dystrophic mdx mice respond differently from those of wild type mice to an acute treatment with corticosterone. Exp Cell Res 2020; 386:111715. [PMID: 31711918 DOI: 10.1016/j.yexcr.2019.111715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 11/04/2019] [Accepted: 11/05/2019] [Indexed: 12/27/2022]
Abstract
Duchenne muscular dystrophy is a lethal genetic disease characterised by progressive degeneration of skeletal muscles induced by deficiency of dystrophin, a cytoskeletal protein expressed in myocytes and in certain neuron populations. The severity of the neurological disorder varies in humans and animal models owing to dysfunction in numerous brain areas, including the hippocampus. Cyclic treatments with high-dose glucocorticoids remain a major pharmacological approach for treating the disease; however, elevated systemic levels of either stress-induced or exogenously administered anti-inflammatory molecules dramatically affect hippocampal activity. In this study, we analysed and compared the response of hippocampal neurons isolated from wild-type and dystrophic mdx mice to acute administration of corticosterone in vitro, without the influence of other glucocorticoid-regulated processes. Our results showed that in neurons of mdx mice, both the genomic and intracellular signalling-mediated responses to corticosterone were affected compared to those in wild-type animals, evoking the characteristic response to detrimental chronic glucocorticoid exposure. Responsiveness to glucocorticoids is, therefore, another function of hippocampal neurons possibly affected by deficiency of Dp427 since embryonic development. Knowing the pivotal role of hippocampus in stress hormone signalling, attention should be paid to the effects that prolonged glucocorticoid treatments may have on this and other brain areas of DMD patients.
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Ramos-Hryb AB, Platt N, Freitas AE, Heinrich IA, López MG, Leal RB, Kaster MP, Rodrigues ALS. Protective Effects of Ursolic Acid Against Cytotoxicity Induced by Corticosterone: Role of Protein Kinases. Neurochem Res 2019; 44:10.1007/s11064-019-02906-1. [PMID: 31713091 DOI: 10.1007/s11064-019-02906-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/09/2019] [Accepted: 11/05/2019] [Indexed: 12/11/2022]
Abstract
Neuronal hippocampal death can be induced by exacerbated levels of cortisol, a condition usually observed in patients with Major depressive disorder (MDD). Previous in vitro and in vivo studies showed that ursolic acid (UA) elicits antidepressant and neuroprotective properties. However, the protective effects of UA against glucocorticoid-induced cytotoxicity have never been addressed. Using an in vitro model of hippocampal cellular death induced by elevated levels of corticosterone, we investigated if UA prevents corticosterone-induced cytotoxicity in HT22 mouse hippocampal derived cells. Concentrations lower than 25 µM UA did not alter cell viability. Co-incubation with UA for 48 h was able to protect HT22 cells from the reduction on cell viability and from the increase in apoptotic cells induced by corticosterone. Inhibition of protein kinase A (PKA), protein kinase C (PKC) and, Ca2+/calmodulin-dependent protein kinase II (CaMKII), but not phosphoinositide 3-kinase(PI3K), by using the pharmacological the inhibitors: H-89, chelerythrine, KN-62, and LY294002, respectively totally abolished the cytoprotective effects of UA. Finally, UA abrogated the reduction in phospho-extracellular signal-regulated kinases 1 and 2 (ERK1/2) but not in phospho-c-Jun kinases induced by corticosterone. These results indicate that the protective effect of UA against the cytotoxicity induced by corticosterone in HT22 cells may involve PKA, PKC, CaMKII, and ERK1/2 activation. The cytoprotective potential of UA against corticosterone-induced cytotoxicity and its ability to modulate intracellular signaling pathways involved in cell proliferation and survival suggest that UA may be a relevant strategy to manage stress-related disorders such as MDD.
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Affiliation(s)
- Ana B Ramos-Hryb
- Department of Biochemistry, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Florianópolis, Brazil
- Department of Pharmacology, Faculty of Medicine, Instituto Teófilo Hernando, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto de Biología y Medicina Experimental (IBYME)-CONICET, Buenos Aires, Argentina
| | - Nicolle Platt
- Department of Biochemistry, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Florianópolis, Brazil
| | - Andiara E Freitas
- Department of Biochemistry, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Florianópolis, Brazil
| | - Isabella A Heinrich
- Department of Biochemistry, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Florianópolis, Brazil
| | - Manuela G López
- Department of Pharmacology, Faculty of Medicine, Instituto Teófilo Hernando, Universidad Autónoma de Madrid, Madrid, Spain
| | - Rodrigo B Leal
- Department of Biochemistry, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Florianópolis, Brazil
| | - Manuella P Kaster
- Department of Biochemistry, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Florianópolis, Brazil
| | - Ana Lúcia S Rodrigues
- Department of Biochemistry, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Campus Universitário, Florianópolis, Brazil.
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7
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Huang XF, Jiang WT, Liu L, Song FC, Zhu X, Shi GL, Ding SM, Ke HM, Wang W, O'Donnell JM, Zhang HT, Luo HB, Wan YQ, Song GQ, Xu Y. A novel PDE9 inhibitor WYQ-C36D ameliorates corticosterone-induced neurotoxicity and depression-like behaviors by cGMP-CREB-related signaling. CNS Neurosci Ther 2018; 24:889-896. [PMID: 29722134 DOI: 10.1111/cns.12864] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/28/2018] [Accepted: 03/29/2018] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Major depressive disorder (MDD) is a mental disease characterized by depressed mood, lifetime anxiety, and deficits of learning and memory. Inhibition of phosphodiesterase 9 (PDE9) has been reported to improve rodent cognitive and memory function. However, the role of PDE9 in MDD, in particular its manifestations of depression and anxiety, has not been investigated. METHODS We examined the protective effects of WYQ-C36D (C36D), a novel PDE9 inhibitor, against corticosterone-induced cytotoxicity, pCREB/CREB and BDNF expression by cell viability, and immunoblot assays in HT-22 cells. The potential effects of C36D at doses of 0.1, 0.5, and 1 mg/kg on stress-induced depression- and anxiety-like behaviors and memory deficits were also examined in mice. RESULTS C36D significantly protected HT-22 cells against corticosterone-induced cytotoxicity and rescued corticosterone-induced decreases in cGMP, CREB phosphorylation, and BDNF expression. All these effects were otherwise blocked by the PKG inhibitor Rp-8-Br-PET-cGMPS (Rp8). In addition, when tested in vivo in stressed mice, C36D produced antidepressant-like effects on behavior, as shown by decreased immobility time both in the forced swimming and tail suspension tests. C36D also showed anxiolytic-like and memory-enhancing effects in the elevated plus-maze and novel object recognition tests. CONCLUSION Our results show that inhibition of PDE9 by C36D produces antidepressant- and anxiolytic-like behavioral effects and memory enhancement by activating cGMP/PKG signaling pathway. PDE9 inhibitors may have the potential as a novel class of drug to treat MDD.
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Affiliation(s)
- Xian-Feng Huang
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, Jiangsu, China
| | - Wen-Tao Jiang
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, Jiangsu, China
| | - Li Liu
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, Jiangsu, China
| | - Fang-Chen Song
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, Jiangsu, China
| | - Xia Zhu
- Department of Pharmacology, School of Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Gui-Lan Shi
- Zibo Vocational Institute, Zibo, Shandong, China
| | - Shu-Ming Ding
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, Jiangsu, China
| | - Heng-Ming Ke
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC, USA
| | - Wei Wang
- Department of Chemistry, University of New Mexico, Albuquerque, NM, USA
| | - James M O'Donnell
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, Buffalo, NY, USA
| | - Han-Ting Zhang
- Departments of Behavioral Medicine & Psychiatry and Physiology, Pharmacology& Neuroscience, The Rockefeller Neurosciences Institute, West Virginia University Health Sciences Center, Morgantown, WV, USA
| | - Hai-Bin Luo
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Yi-Qian Wan
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Guo-Qiang Song
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, Jiangsu, China
| | - Ying Xu
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, Buffalo, NY, USA
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Latt HM, Matsushita H, Morino M, Koga Y, Michiue H, Nishiki T, Tomizawa K, Matsui H. Oxytocin Inhibits Corticosterone-induced Apoptosis in Primary Hippocampal Neurons. Neuroscience 2018; 379:383-389. [DOI: 10.1016/j.neuroscience.2018.03.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 02/20/2018] [Accepted: 03/16/2018] [Indexed: 12/17/2022]
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9
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Liu L, Zheng J, Huang XF, Zhu X, Ding SM, Ke HM, O'Donnell JM, Zhang HT, Song GQ, Xu Y. The neuroprotective and antidepressant-like effects of Hcyb1, a novel selective PDE2 inhibitor. CNS Neurosci Ther 2018; 24:652-660. [PMID: 29704309 DOI: 10.1111/cns.12863] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/28/2018] [Accepted: 03/28/2018] [Indexed: 12/18/2022] Open
Abstract
AIMS Depression is currently the most common mood disorder. Regulation of intracellular cyclic adenosine monophosphate (cAMP) and/or cyclic guanosine monophosphate (cGMP) signaling by phosphodiesterase (PDE) inhibition has been paid much attention for treatment of depression. This study aimed to investigate the neuroprotective effects of Hcyb1, a novel PDE2 inhibitor, in HT-22 cells and antidepressant-like effects in mouse models of depression. METHODS Hcyb1 was synthesized and its selectivity upon PDE2 was tested. Moreover, HT-22 hippocampal cells were used to determine the effects of Hcyb1 on cell viability, cyclic nucleotide levels, and the downstream molecules related to cAMP/cGMP signaling by neurochemical, enzyme-linked immunosorbent, and immunoblot assays in vitro. The antidepressant-like effects of Hcyb1 were also determined in the forced swimming and tail suspension tests in mice. RESULTS Hcyb1 had a highly selective inhibition of PDE2A (IC50 = 0.57 ± 0.03 μmol/L) and over 250-fold selectivity against other recombinant PDE family members. Hcyb1 at concentrations of 10-10 and 10-9 mol/L significantly increased cell viability after treatment for 24 hours. At concentrations of 10-9 ~10-7 mol/L, Hcyb1 also increased cGMP levels by 1.7~2.3 folds after 10-minute treatment. Furthermore, Hcyb1 at the concentrations of 10-9 mol/L increased both cGMP and cAMP levels 24 hours after treatment. The levels of phosphorylation of CREB and BDNF were also increased by Hcyb1 treatment in HT-22 cells for 24 hours. Finally, in the in vivo tests, Hcyb1 (0.5, 1, and 2 mg/kg, i.g.) decreased the immobility time in both forced swimming and tail suspension tests, without altering locomotor activity. CONCLUSION These results suggest that the novel PDE2 inhibitor Hcyb1 produced neuroprotective and antidepressant-like effects most likely mediated by cAMP/cGMP-CREB-BDNF signaling.
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Affiliation(s)
- Li Liu
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Jing Zheng
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Xian-Feng Huang
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Xia Zhu
- Department of Pharmacology, School of Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Shu-Ming Ding
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Heng-Ming Ke
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC, USA
| | - James M O'Donnell
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, NY, USA
| | - Han-Ting Zhang
- Department of Behavioral Medicine & Psychiatry and Physiology, Pharmacology & Neuroscience, Rockefeller Neurosciences Institute, West Virginia University Health Science Center, Morgantown, WV, USA
| | - Guo-Qiang Song
- School of Pharmaceutical Engineering and Life Sciences, Changzhou University, Changzhou, China
| | - Ying Xu
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, The State University of New York, Buffalo, NY, USA
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Bonaterra GA, Schwendler A, Hüther J, Schwarzbach H, Schwarz A, Kolb C, Abdel-Aziz H, Kinscherf R. Neurotrophic, Cytoprotective, and Anti-inflammatory Effects of St. John's Wort Extract on Differentiated Mouse Hippocampal HT-22 Neurons. Front Pharmacol 2018; 8:955. [PMID: 29403374 PMCID: PMC5778116 DOI: 10.3389/fphar.2017.00955] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 12/15/2017] [Indexed: 12/30/2022] Open
Abstract
Introduction: Since ancient times Hypericum perforatum L. named St. John's wort (SJW), has been used in the management of a wide range of applications, including nervous disorders. Development of mood disorders are due to alterations in glutamate metabolism, initiation of inflammatory pathways, and changes of the neuronal plasticity. Previous studies suggest that the glutamatergic system contributes to the pathophysiology of depression. Extracts of SJW have been recommended for the treatment of depression. The aim of the present in vitro study was to evaluate the action of STW3-VI, a special SJW extract in differentiated mouse hippocampal HT-22 neurons. We evaluated the stimulation of neurogenesis, the protective effect against glutamate or N-methyl-D-aspartate receptor induced-excitotoxicity and its anti-inflammatory properties in LPS-activated human macrophages. Results: After 48 h treatment, STW3-VI stimulated the neurite formation by 25% in comparison with the control and showed protective effects against glutamate- or NMDA-induced cytotoxicity by significantly increasing the viability about +25 or +50%. In conjunction with these effects, after pretreatment with STW3-VI, the intracellular reduced glutathione content was significantly 2.3-fold increased compared with the neurons incubated with glutamate alone. Additionally, pre-treatment of human macrophages with STW3-VI showed anti-inflammatory effects after 24 or 48 h concerning inhibition of LPS-induced TNF release by -47.3 and -53.8% (24 h) or -25.0 to -64.8% (48 h). Conclusions: Our data provide new evidence that STW3-VI protects hippocampal cells from NMDA- or glutamate-induced cytotoxicity. Moreover, our results indicate a morphological remodeling by increasing neurite outgrowth and activation of the anti-inflammatory defense by inhibition of the cytokine production in human macrophages after STW3-VI treatment. These protective, neurotrophic and anti-inflammatory properties may be beneficial in the treatment of depressive disorders.
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Affiliation(s)
- Gabriel A Bonaterra
- Department of Medical Cell Biology, Institute for Anatomy and Cell Biology, Philipps-University of Marburg, Marburg, Germany
| | - Anna Schwendler
- Department of Medical Cell Biology, Institute for Anatomy and Cell Biology, Philipps-University of Marburg, Marburg, Germany
| | - Julian Hüther
- Department of Medical Cell Biology, Institute for Anatomy and Cell Biology, Philipps-University of Marburg, Marburg, Germany
| | - Hans Schwarzbach
- Department of Medical Cell Biology, Institute for Anatomy and Cell Biology, Philipps-University of Marburg, Marburg, Germany
| | - Anja Schwarz
- Department of Medical Cell Biology, Institute for Anatomy and Cell Biology, Philipps-University of Marburg, Marburg, Germany
| | - Christiane Kolb
- Steigerwald Arzneimittelwerk GmbH, Scientific Department, Darmstadt, Germany
| | - Heba Abdel-Aziz
- Steigerwald Arzneimittelwerk GmbH, Scientific Department, Darmstadt, Germany
| | - Ralf Kinscherf
- Department of Medical Cell Biology, Institute for Anatomy and Cell Biology, Philipps-University of Marburg, Marburg, Germany
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LRRK2 G2019S Induces Anxiety/Depression-like Behavior before the Onset of Motor Dysfunction with 5-HT 1A Receptor Upregulation in Mice. J Neurosci 2018; 38:1611-1621. [PMID: 29305532 DOI: 10.1523/jneurosci.4051-15.2017] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 12/26/2017] [Accepted: 12/26/2017] [Indexed: 11/21/2022] Open
Abstract
Mutations in the leucine-rich repeat kinase 2 (LRRK2) gene are the most common genetic cause of Parkinson's disease (PD). The neuropathology of LRRK2 mutation-related PD, including increased dopaminergic neurodegeneration and Lewy bodies, is indistinguishable from that of idiopathic PD. The subtle nonmotor phenotypes of LRRK2 mutation-related PD have not been fully evaluated. In the present study, we examined anxiety/depression-like behaviors and accompanying neurochemical changes in differently aged transgenic (Tg) mice expressing human mutant LRRK2 G2019S. Through multiple behavioral tests, including light-dark test, elevated plus maze, sucrose preference test, forced swimming test, and tail-suspension test, we found that anxiety/depression-like behavior appeared in middle-aged (43-52 weeks) Tg mice before the onset of PD-like motor dysfunction. These behavioral tests were performed using both male and female mice, and there were no sex-related differences in behavioral changes in the middle-aged Tg mice. Along with behavioral changes, serotonin levels also significantly declined in the hippocampus of Tg mice. Additionally, increases in the expression of the 5-HT1A receptor (5-HT1AR) grew more significant with aging and were detected in the hippocampus, amygdala, and dorsal raphe nucleus. In vitro study using the serotonergic RN46A and hippocampal HT22 cells showed that 5-HT1AR upregulation was related to enhanced expression of LRRK2 G2019S and was attenuated by the LRRK2 inhibitor LRRK2-IN-1. Wild-type LRRK2 had no significant effect on 5-HT1AR transcription. The present study provides the first in vivo and in vitro evidence demonstrating abnormal regulation of 5-HT1AR along with the manifestation of anxiety/depression-like, nonmotor symptom in PD related to LRRK2.SIGNIFICANCE STATEMENT Parkinson's disease (PD), the second most common neurodegenerative disorder, is clinically characterized by motor dysfunctions. In most cases, various nonmotor symptoms present several years before the onset of the classical motor features of PD and severely affect the quality of life of patients. Here, we demonstrate the causative role of leucine-rich repeat kinase 2 (LRRK2), a common PD-linked mutation, in the development of anxiety/depression-like behaviors. We found that age-dependent 5-HT1A receptor upregulation in the hippocampus, amygdala, and dorsal raphe nucleus is accompanied by the expression of the LRRK2 mutant phenotype. Our findings demonstrating a potential mechanism for nonmotor psychiatric symptoms produced by LRRK2 mutation suggest that directly targeting the 5-HT1A receptor can improve the therapeutic efficacy of drugs for PD-associated depression.
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Li H, Zhang C, Shen H, Shen Z, Wu L, Mo F, Li M. Physiological stress-induced corticosterone increases heme uptake via KLF4-HCP1 signaling pathway in hippocampus neurons. Sci Rep 2017; 7:5745. [PMID: 28720846 PMCID: PMC5515979 DOI: 10.1038/s41598-017-06058-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 06/07/2017] [Indexed: 11/10/2022] Open
Abstract
Iron overload has attracted much attention because of its adverse effect in increasing the risk of developing several neurodegenerative disorders. Under various pathologic conditions, a lot of heme are released. The aggregation of heme is more neurotoxic than that of iron released from the heme breakdown. Our previous studies demonstrated that psychological stress (PS) is a risk factor of cerebral iron metabolism disorders, thus causing iron accumulation in rat brains. In the present study, we found PS could increase heme uptake via heme carrier protein 1 (HCP1) in rat brains. We demonstrated that Glucocorticoid (GC), which is largely secreted under stress, could up-regulate HCP1 expression, thus promoting heme uptake in neurons. We also ascertained that HCP1 expression can be induced by GC through a transcription factor, Krüppel-like factor 4 (KLF4). These results may gain new insights into the etiology of heme uptake and iron accumulation in PS rats, and find new therapeutic targets of iron accumulation in Parkinson’s disease or Alzheimer’s disease.
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Affiliation(s)
- Hongxia Li
- Department of Ship Hygiene, Faculty of Naval Medicine, Second Military Medical University, Shanghai, 200433, China
| | - Caixia Zhang
- Department of Ship Hygiene, Faculty of Naval Medicine, Second Military Medical University, Shanghai, 200433, China.,Department of Nursing, People's Libration Army of 266 Hospital, Chengde City, Hubei, 067000, China
| | - Hui Shen
- Department of Ship Hygiene, Faculty of Naval Medicine, Second Military Medical University, Shanghai, 200433, China
| | - Zhilei Shen
- Department of Ship Hygiene, Faculty of Naval Medicine, Second Military Medical University, Shanghai, 200433, China
| | - Lusha Wu
- Department of Ship Hygiene, Faculty of Naval Medicine, Second Military Medical University, Shanghai, 200433, China
| | - Fengfeng Mo
- Department of Ship Hygiene, Faculty of Naval Medicine, Second Military Medical University, Shanghai, 200433, China.
| | - Min Li
- Department of Ship Hygiene, Faculty of Naval Medicine, Second Military Medical University, Shanghai, 200433, China.
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13
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Zhang C, Xu Y, Zhang HT, Gurney ME, O'Donnell JM. Comparison of the Pharmacological Profiles of Selective PDE4B and PDE4D Inhibitors in the Central Nervous System. Sci Rep 2017; 7:40115. [PMID: 28054669 PMCID: PMC5215650 DOI: 10.1038/srep40115] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 12/02/2016] [Indexed: 12/24/2022] Open
Abstract
Inhibition of cyclic AMP (cAMP)-specific phosphodiesterase 4 (PDE4) has been proposed as a potential treatment for a series of neuropsychological conditions such as depression, anxiety and memory loss. However, the specific involvement of each of the PDE4 subtypes (PDE4A, 4B and 4C) in different categories of behavior has yet to be elucidated. In the present study, we compared the possible pharmacological effects of PDE4B and PDE4D selective inhibitors, A-33 and D159687, in mediating neurological function in mice. Both compounds were equally potent in stimulating cAMP signaling in the mouse hippocampal cell line HT-22 leading to an increase in CREB phosphorylation. In contrast, A-33 and D159687 displayed distinct neuropharmacological effects in mouse behavioral tests. A-33 has an antidepressant-like profile as indicated by reduced immobility time in the forced swim and tail suspension tasks, as well as reduced latency to feed in the novelty suppressed feeding test. D159687, on the other hand, had a procognitive profile as it improved memory in the novel object recognition test but had no antidepressant or anxiolytic benefit. The present data suggests that inhibitors targeting specific subtypes of PDE4 may exhibit differential pharmacological effects and aid a more efficient pharmacotherapy towards neuropsychological conditions.
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Affiliation(s)
- Chong Zhang
- Department of Pharmacology and Toxicology, School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, 14214, USA
| | - Ying Xu
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, 14214, USA
| | - Han-Ting Zhang
- Department of Behavioral Medicine &Psychiatry, West Virginia University, Morgantown, WV, 26505, USA
| | - Mark E Gurney
- Tetra Discovery Partners, Inc., Grand Rapids, MI 49503, USA
| | - James M O'Donnell
- Department of Pharmacology and Toxicology, School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, 14214, USA.,Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, 14214, USA
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Liver 5-HT7 receptors: A novel regulator target of fibrosis and inflammation-induced chronic liver injury in vivo and in vitro. Int Immunopharmacol 2016; 43:227-235. [PMID: 28043031 DOI: 10.1016/j.intimp.2016.12.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 12/03/2016] [Accepted: 12/18/2016] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND AIM Hepatocellular cancer (HCC) is the sixth most common cancer and liver fibrosis is strongly associated with HCC. Treatment options are limited, and preventive strategies should be developed. An important step in the beginning of liver fibrosis is a strong inflammatory response. 5-HT7 is the last recognized member of the serotonin receptor family and is expressed in both central nerve system and peripheral system and have a lot of functions like learning, memory, smooth muscular relaxation, in the control of circadian rhythms and thermoregulation, pain and migraine, schizophrenia, anxiety, cognitive disturbances, and even inflammation. METHODS We therefore examined the biochemical, histopathological and molecular effects of the 5-HT7 receptor agonist and antagonist on inflammatory liver fibrogenesis in animal models of progressive cirrhosis: a mouse model induced by carbon tetrachloride (CCl4) and in Hep3b cells. RESULTS 5-HT7 expression was observed in the liver in vivo and in vitro in CCl4-induced damage. 5-HT7 receptor agonist but not the antagonist reduced liver markers in mice and in Hep3b cells in carbon tetrachloride (CCl4) induced damage. 5-HT7 agonist, but not antagonist, protected liver tissue from oxidative stress in fibrosis. 5-HT7 agonist but not antagonist induces anti-inflammatory, anti-fibrinotic and anti-cytokine features in liver fibrosis in vivo and in vitro. CONCLUSIONS 5-HT7 receptors have modulatory function and are an up-and-coming pharmacological target in the inflammatory fibrotic process. 5-HT7 receptor agonist LP-44 showed significant hepatoprotective effects against liver fibrosis, and LP-44 might become a useful therapeutic target for chronic liver inflammation and fibrosis.
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Sim Y, Choi JG, Gu PS, Ryu B, Kim JH, Kang I, Jang DS, Oh MS. Identification of Neuroactive Constituents of the Ethyl Acetate Fraction from Cyperi Rhizoma Using Bioactivity-Guided Fractionation. Biomol Ther (Seoul) 2016; 24:438-45. [PMID: 27350341 PMCID: PMC4930289 DOI: 10.4062/biomolther.2016.091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 05/23/2016] [Accepted: 06/07/2016] [Indexed: 11/15/2022] Open
Abstract
Cyperi Rhizoma (CR), the rhizome of Cyperus rotundus L., exhibits neuroprotective effects in in vitro and in vivo models of neuronal diseases. Nevertheless, no study has aimed at finding the neuroactive constituent(s) of CR. In this study, we identified active compounds in a CR extract (CRE) using bioactivity-guided fractionation. We first compared the anti-oxidative and neuroprotective activities of four fractions and the CRE total extract. Only the ethyl acetate (EA) fraction revealed strong activity, and further isolation from the bioactive EA fraction yielded nine constituents: scirpusin A (1), scirpusin B (2), luteolin (3), 6′-acetyl-3,6-diferuloylsucrose (4), 4′,6′ diacetyl-3,6-diferuloylsucrose (5), p-coumaric acid (6), ferulic acid (7), pinellic acid (8), and fulgidic acid (9). The activities of constituents 1–9 were assessed in terms of anti-oxidative, neuroprotective, anti-inflammatory, and anti-amyloid-β activities. Constituents 1, 2, and 3 exhibited strong activities; constituents 1 and 2 were characterized for the first time in this study. These results provide evidence for the value of CRE as a source of multi-functional neuroprotectants, and constituents 1 and 2 may represent new candidates for further development in therapeutic use against neurodegenerative diseases.
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Affiliation(s)
- Yeomoon Sim
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Jin Gyu Choi
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Pil Sung Gu
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Byeol Ryu
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Jeong Hee Kim
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.,Department of Oral Biochemistry and Molecular Biology, School of Dentistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Insug Kang
- Department of Biochemistry and Molecular Biology, Medical Research Center for Bioreaction to Reactive Oxygen Species and Biomedical Science Institute, School of Medicine, Kyung Hee University, Seoul
| | - Dae Sik Jang
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.,Department of Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Myung Sook Oh
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.,Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
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The critical role of spinal 5-HT7 receptors in opioid and non-opioid type stress-induced analgesia. Eur J Pharmacol 2015; 762:402-10. [PMID: 25917322 DOI: 10.1016/j.ejphar.2015.04.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/07/2015] [Accepted: 04/12/2015] [Indexed: 12/15/2022]
Abstract
The opioid and non-opioid types of stress-induced analgesia have been well defined. One of the non-opioid type involve the endocannabinoid system. We previously reported that the spinal serotonin 7 receptor (5-HT7) blockers inhibit both morphine and cannabinoid-induced analgesia, thus we hypothesized that descending serotonergic pathways-spinal 5-HT7 receptor loop might contribute to stress-induced analgesia. Stress-induced analgesia was induced with warm (32°C) or cold (20°C) water swim stress in male Balb-C mice. The effects of intrathecal injection of a selective 5-HT7 receptor antagonist, SB 269970, of the denervation of serotonergic neurons by intrathecal administration of 5,7-dihydroxytryptamine (5,7-DHT) and of lesions of the dorsolateral funiculus on opioid and non-opioid type stress-induced analgesia were evaluated with the tail-flick and hot plate tests. The expression of 5-HT7 receptors mRNA in the dorsal lumbar region of spinal cord were analyzed by RT-PCR following spinal serotonin depletion or dorsolateral funiculus lesion. The effects of the selective 5-HT7 receptor agonists LP 44 and AS 19 were tested on nociception. Intrathecal SB 269970 blocked both opioid and non-opioid type stress-induced analgesia. Dorsolateral funiculus lesion or denervation of the spinal serotonergic neurons resulted in a marked decrease in 5-HT7 receptor expression in the dorsal lumbar spinal cord, accompanied by inhibition of opioid and non-opioid type stress-induced analgesia. However, the systemic or intrathecal LP 44 and AS 19 alone did not produce analgesia in unstressed mice. These results indicate that descending serotonergic pathways and the spinal 5-HT7 receptor loop play a crucial role in mediating both opioid and non-opioid type stress-induced analgesia.
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Nakatani Y, Tsuji M, Amano T, Miyagawa K, Miyagishi H, Saito A, Imai T, Takeda K, Ishii D, Takeda H. Neuroprotective effect of yokukansan against cytotoxicity induced by corticosterone on mouse hippocampal neurons. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2014; 21:1458-65. [PMID: 25022209 DOI: 10.1016/j.phymed.2014.06.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Revised: 04/17/2014] [Accepted: 06/09/2014] [Indexed: 05/26/2023]
Abstract
Yokukansan, a traditional Japanese herbal medicine, has been used for the management of neurodegenerative disorders and for the treatment of neurosis, insomnia, and behavioral and psychological symptoms of dementia. Recently, several studies have shown that yokukansan has a neuroprotective effect. The aim of this study was to examine the neuroprotective effect of yokukansan on hippocampal neurons from embryonic mouse brain against the effects of corticosterone, which is considered to be a stress hormone and to be cytotoxic toward neurons. The cell survival rates were measured by the WST-8 assay and LDH assay. Twenty-four hours after treatment with corticosterone, cell numbers were significantly decreased compared with the control or treatment with vehicle in a dose-dependent manner. When cells were treated with 30 μM corticosterone, the decrease in the number of cells was significantly recovered by treatment with yokukansan (100-1,000 μg/ml) in a dose-dependent manner. However, yokukansan did not suppress the decrease in cell numbers that was induced by treatment with 100 μM corticosterone. In the LDH assay, treatment with yokukansan at a high concentration (500-1,000 μg/ml) suppressed the LDH concentration induced by treatment with both 30 μM and 100 μM corticosterone compared to treatment with corticosterone alone, respectively. These results suggest that yokukansan protects against the cytotoxic effect of a low concentration of corticosterone on hippocampal neurons.
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Affiliation(s)
- Yoshihiko Nakatani
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan; Department of Pharmacotherapeutics, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan; Advanced Education and Research Center for Kampo Medicine, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan.
| | - Minoru Tsuji
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan; Advanced Education and Research Center for Kampo Medicine, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
| | - Taku Amano
- Department of Pharmacotherapeutics, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
| | - Kazuya Miyagawa
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
| | - Hiroko Miyagishi
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
| | - Atsumi Saito
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
| | - Taro Imai
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
| | - Kotaro Takeda
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
| | - Daisuke Ishii
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
| | - Hiroshi Takeda
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan; Advanced Education and Research Center for Kampo Medicine, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara, Tochigi 324-8501, Japan
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Pistollato F, Louisse J, Scelfo B, Mennecozzi M, Accordi B, Basso G, Gaspar JA, Zagoura D, Barilari M, Palosaari T, Sachinidis A, Bremer-Hoffmann S. Development of a pluripotent stem cell derived neuronal model to identify chemically induced pathway perturbations in relation to neurotoxicity: effects of CREB pathway inhibition. Toxicol Appl Pharmacol 2014; 280:378-88. [PMID: 25150140 DOI: 10.1016/j.taap.2014.08.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 07/01/2014] [Accepted: 08/11/2014] [Indexed: 01/09/2023]
Abstract
According to the advocated paradigm shift in toxicology, acquisition of knowledge on the mechanisms underlying the toxicity of chemicals, such as perturbations of biological pathways, is of primary interest. Pluripotent stem cells (PSCs), such as human embryonic stem cells (hESCs) and human induced pluripotent stem cells (hiPSCs), offer a unique opportunity to derive physiologically relevant human cell types to measure molecular and cellular effects of such pathway modulations. Here we compared the neuronal differentiation propensity of hESCs and hiPSCs with the aim to develop novel hiPSC-based tools for measuring pathway perturbation in relation to molecular and cellular effects in vitro. Among other fundamental pathways, also, the cAMP responsive element binding protein (CREB) pathway was activated in our neuronal models and gave us the opportunity to study time-dependent effects elicited by chemical perturbations of the CREB pathway in relation to cellular effects. We show that the inhibition of the CREB pathway, using 2-naphthol-AS-E-phosphate (KG-501), induced an inhibition of neurite outgrowth and synaptogenesis, as well as a decrease of MAP2(+) neuronal cells. These data indicate that a CREB pathway inhibition can be related to molecular and cellular effects that may be relevant for neurotoxicity testing, and, thus, qualify the use of our hiPSC-derived neuronal model for studying chemical-induced neurotoxicity resulting from pathway perturbations.
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Affiliation(s)
| | - Jochem Louisse
- Institute for Health and Consumer Protection (IHCP), JRC, Ispra, Italy
| | - Bibiana Scelfo
- Institute for Health and Consumer Protection (IHCP), JRC, Ispra, Italy
| | - Milena Mennecozzi
- Institute for Health and Consumer Protection (IHCP), JRC, Ispra, Italy
| | - Benedetta Accordi
- Oncohematology Laboratory, Department of Woman and Child Health, University of Padova, Padova, Italy
| | - Giuseppe Basso
- Oncohematology Laboratory, Department of Woman and Child Health, University of Padova, Padova, Italy
| | - John Antonydas Gaspar
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne, Cologne, Germany
| | - Dimitra Zagoura
- Institute for Health and Consumer Protection (IHCP), JRC, Ispra, Italy
| | - Manuela Barilari
- Institute for Health and Consumer Protection (IHCP), JRC, Ispra, Italy
| | - Taina Palosaari
- Institute for Health and Consumer Protection (IHCP), JRC, Ispra, Italy
| | - Agapios Sachinidis
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne, Cologne, Germany
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Martin-Montañez E, Pavia J, Santin LJ, Boraldi F, Estivill-Torrus G, Aguirre JA, Garcia-Fernandez M. Involvement of IGF-II receptors in the antioxidant and neuroprotective effects of IGF-II on adult cortical neuronal cultures. Biochim Biophys Acta Mol Basis Dis 2014; 1842:1041-51. [PMID: 24667322 DOI: 10.1016/j.bbadis.2014.03.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 03/14/2014] [Accepted: 03/17/2014] [Indexed: 01/26/2023]
Abstract
Insulin-like growth factor-II (IGF-II) is a naturally occurring peptide that exerts known pleiotropic effects ranging from metabolic modulation to cellular development, growth and survival. IGF-II triggers its actions by binding to and activating IGF (IGF-I and IGF-II) receptors. In this study, we assessed the neuroprotective effect of IGF-II on corticosterone-induced oxidative damage in adult cortical neuronal cultures and the role of IGF-II receptors in this effect. We provide evidence that treatment with IGF-II alleviates the glucocorticoid-induced toxicity to neuronal cultures, and this neuroprotective effect occurred due to a decrease in reactive oxygen species (ROS) production and a return of the antioxidant status to normal levels. IGF-II acts via not only the regulation of synthesis and/or activity of antioxidant enzymes, especially manganese superoxide dismutase, but also the restoration of mitochondrial cytochrome c oxidase activity and mitochondrial membrane potential. Although the antioxidant effect of IGF-I receptor activation has been widely reported, the involvement of the IGF-II receptor in these processes has not been clearly defined. The present report is the first evidence describing the involvement of IGF-II receptors in redox homeostasis. IGF-II may therefore contribute to the mechanisms of neuroprotection by acting as an antioxidant, reducing the neurodegeneration induced by oxidative insults. These results open the field to new pharmacological approaches to the treatment of diseases involving imbalanced redox homeostasis. In this study, we demonstrated that the antioxidant effect of IGF-II is at least partially mediated by IGF-II receptors.
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Affiliation(s)
- Elisa Martin-Montañez
- Department of Pharmacology and Paediatrics, Malaga University, Biomedical Research Institute of Malaga (IBIMA), E-29071 Malaga, Spain
| | - José Pavia
- Department of Pharmacology and Paediatrics, Malaga University, Biomedical Research Institute of Malaga (IBIMA), E-29071 Malaga, Spain; Clinical Neurosciences Unit, Research Laboratory and Microscopy Unit, Biomedical Research Institute of Malaga (IBIMA), Regional University Hospital of Malaga, E-29010 Málaga, Spain
| | - Luis J Santin
- Department of Psychobiology, Malaga University, Biomedical Research Institute of Malaga (IBIMA), E-29071 Malaga, Spain
| | - Federica Boraldi
- Department of Life Sciences, University of Modena e Reggio Emilia, I-41010 Modena, Italy
| | - Guillermo Estivill-Torrus
- Clinical Neurosciences Unit, Research Laboratory and Microscopy Unit, Biomedical Research Institute of Malaga (IBIMA), Regional University Hospital of Malaga, E-29010 Málaga, Spain
| | - José A Aguirre
- Department of Human Physiology, Malaga University, Biomedical Research Institute of Malaga (IBIMA), E-29071 Malaga, Spain
| | - Maria Garcia-Fernandez
- Department of Human Physiology, Malaga University, Biomedical Research Institute of Malaga (IBIMA), E-29071 Malaga, Spain.
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Guo WZ, Miao YL, An LN, Wang XY, Pan NL, Ma YQ, Chen HX, Zhao N, Zhang H, Li YF, Mi WD. Midazolam provides cytoprotective effect during corticosterone-induced damages in rat astrocytes by stimulating steroidogenesis. Neurosci Lett 2013; 547:53-8. [DOI: 10.1016/j.neulet.2013.05.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 04/30/2013] [Accepted: 05/03/2013] [Indexed: 10/26/2022]
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Phosphodiesterase-2 inhibitor reverses corticosterone-induced neurotoxicity and related behavioural changes via cGMP/PKG dependent pathway. Int J Neuropsychopharmacol 2013; 16:835-47. [PMID: 22850435 DOI: 10.1017/s146114571200065x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Phosphodiesterase 2 (PDE2) is an enzyme responsible for hydrolysis of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) to restrict intracellular signalling of these second messenger molecules. This study investigated how PDE2 inhibitor Bay 60-7550 affects the dysregulated glucocorticoid signalling in neuronal cells and regulates depressive behaviours after chronic stress in mice. We found that exposure of hippocampal neurons to corticosterone resulted in time- and concentration-dependent increases in PDE2 expression. These intriguing findings were confirmed in the hippocampal cell line HT-22. After corticosterone exposure for 24 h, HT-22 cells showed a concentration-dependent increase in mRNA levels for PDE2 subtypes, PDE2A1 and 2A3, as well as for the total PDE2A protein expression. Bay 60-7550 was found to reverse the cell lesion induced by corticosterone (50 μm). This neuroprotective effect was blocked by pretreatment with protein kinase G inhibitor KT5823, but not protein kinase A inhibitor H89, suggesting the involvement of cGMP-dependent signalling. Although Bay 60-7550 treatment for 24 h did not change the levels of phosphorylated mitogen-activated protein kinases ERK1/2 (pERK) and phosphorylated cAMP response element-binding protein (pCREB), it down-regulated pERK at 2 h and up-regulated a CREB co-activator, CREB-binding protein, at 24 h. Both of these effects were blocked by KT 5823. Furthermore, Bay 60-7550 reversed corticosterone-induced down-regulation of brain-derived neurotrophic factor protein levels 24 h after corticosterone exposure. In behavioural testing, Bay 60-7550 produced antidepressant-like effects and reduced corticosterone levels in stressed mice, further supporting the involvement of a PDE2-dependent pathway in mediating Bay 60-7550's effect during stress hormone insults.
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Ogle WO, Speisman RB, Ormerod BK. Potential of treating age-related depression and cognitive decline with nutraceutical approaches: a mini-review. Gerontology 2012; 59:23-31. [PMID: 22947921 DOI: 10.1159/000342208] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 07/30/2012] [Indexed: 01/15/2023] Open
Abstract
A variety of consumable plant-derived phytochemicals exhibit nutraceutical properties because they produce physiological benefits and combat disease processes. Emerging evidence suggests that widely accessible and safe organic polyphenolic phytochemicals, in particular, treat depression at much lower concentrations than clinical doses of classical drugs. Structurally similar polyphenolics such as curcumin, resveratrol, and proanthocyanidins exhibit antioxidant and immunomodulatory properties and recent research suggests that they also modulate hypothalamic-pituitary-adrenal (HPA) axis activity, serotonergic transmission and hippocampal neurogenesis (perhaps via their effects on serotonin and HPA activity). These data tempt speculation that polyphenolic compounds could also combat age-related cognitive decline, which is often accompanied by depression and potentially by reduced levels of hippocampal neurogenesis. Here we review the relationships between dysregulation of these systems and age-related cognitive decline. We then suggest that this group of structurally similar polyphenolic compounds may be particularly promising therapeutic leads for age-related cognitive decline and depression because they modulate these processes.
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Affiliation(s)
- William O Ogle
- J. Crayton Pruitt Family Department of Biomedical Engineering, Evelyn F. & William L. McKnight Brain Institute, and Institute on Aging, University of Florida, Gainesville, FL 32611, USA
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Hazra R, Guo JD, Dabrowska J, Rainnie DG. Differential distribution of serotonin receptor subtypes in BNST(ALG) neurons: modulation by unpredictable shock stress. Neuroscience 2012; 225:9-21. [PMID: 22922122 DOI: 10.1016/j.neuroscience.2012.08.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/30/2012] [Accepted: 08/09/2012] [Indexed: 11/17/2022]
Abstract
The bed nucleus of the stria terminalis (BNST) plays a critical role in regulating the behavioral response to stress. Stressors that activate the BNST also activate serotonergic (5-HT) systems. Hence, maladaptive changes of 5-HT receptor expression may contribute to stress-induced anxiety disorders. The BNST contains three neuronal types, Type I-III neurons. However, little is known about 5-HT receptor subtypes mRNA expression in these neurons, or whether it can be modulated by stress. Whole-cell patch clamp recording from Type I-III neurons was used in conjunction with single cell reverse transcriptase polymerase chain reaction (RT-PCR) to characterize 5-HT receptor mRNA expression, and examine the effects of stress on this expression. We report that Type I neurons expressed mRNA transcripts predominantly for 5-HT(1A) and 5-HT(7) receptors. Type II neurons expressed transcripts for every 5-HT receptor except the 5-HT(2C) receptor. Type II neurons were divided into three sub-populations: Type IIA in which transcripts for 5-HT(3) and 5-HT(7) receptors predominate, Type IIB that mainly express 5-HT(1B) and 5-HT(4) receptor transcripts, and Type IIC in which transcripts for 5-HT(1A) and 5-HT(2A) receptors predominate. Type III neurons were also subdivided into two sub-populations; one that predominantly expressed transcripts for 5-HT(1A), 5-HT(1B) and 5-HT(2A) receptors, and another that mainly expressed transcripts for 5-HT(2C) receptor. Unpredictable shock stress (USS) caused a long-lasting increase in anxiety-like behavior, and a concomitant decrease in 5-HT(1A) transcript expression in Type I-III neurons, as well as an up-regulation of a transcriptional repressor of 5-HT(1A) gene expression, deformed epidermal autoregulatory factor 1 (Deaf-1). Significantly USS decreased 5-HT(1A) protein level, and increased the level of Deaf-1. USS also increased 5-HT(1B) transcript expression in Type III neurons, as well as 5-HT(7) expression in Type I and II neurons. These data suggest that cell type-specific disruption of 5-HT receptor expression in BNST(ALG) neurons may contribute to stress-induced anxiety disorders.
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Affiliation(s)
- R Hazra
- Division of Behavioral Neuroscience and Psychiatric Disorders, Yerkes National Primate Research Center, Atlanta, GA, USA
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Nakatani Y, Amano T, Tsuji M, Takeda H. Corticosterone suppresses the proliferation of BV2 microglia cells via glucocorticoid, but not mineralocorticoid receptor. Life Sci 2012; 91:761-70. [PMID: 22940619 DOI: 10.1016/j.lfs.2012.08.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 07/26/2012] [Accepted: 08/08/2012] [Indexed: 01/22/2023]
Abstract
AIMS Corticosterone (CORT), which is often referred to as the stress hormone, is a well-known regulator of peripheral immune responses and also shows anti-inflammatory properties in the brain. Microglia play a key role in immune response and inflammation in the brain. However, it is still unclear how CORT affects microglia. In this study, we focused on the effects of CORT on the proliferation and survival of microglia using mouse microglia cell line BV2. MAIN METHODS We used WST-8 and LDH (lactate dehydrogenase) assays to check the effects of CORT for the proliferation and survival in BV2 microglia cells. We also analyzed the expression pattern of proteins which related to CORT signal cascades using western blotting analysis. KEY FINDINGS Under treatment with 0.1, 1 and 10μM CORT for 24h, the BV2 proliferation rate decreased to 83, 77 and 70% of that in the control. Moreover, this inhibition was blocked by treatment with mifepristone, a glucocorticoid receptor (GR) antagonist, but not by spironolactone, a mineralocorticoid receptor (MR) antagonist. Moreover, an LDH assay showed that CORT was dose-dependently cytotoxic toward BV2 microglia cells and this cytotoxicity was partially abolished by treatment with mifepristone. In addition, treatment with CORT resulted in the translocation of GR, but not MR, from the cytosol to the nucleus. SIGNIFICANCE Our findings suggested that CORT suppresses the proliferation of BV2 microglia cells accompanied with a cytotoxic effect that is induced by the formation of a CORT-GR complex.
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Affiliation(s)
- Yoshihiko Nakatani
- Department of Pharmacology, School of Pharmacy, International University of Health and Welfare, Kitakanemaru, Ohtawara, Tochigi, Japan.
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Zhang H, Liu B, Wu J, Xu C, Tao J, Duan X, Cao Y, Dong J. Icariin inhibits corticosterone-induced apoptosis in hypothalamic neurons via the PI3-K/Akt signaling pathway. Mol Med Rep 2012; 6:967-72. [PMID: 22923091 DOI: 10.3892/mmr.2012.1041] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2012] [Accepted: 08/06/2012] [Indexed: 11/06/2022] Open
Abstract
Excessive corticosterone (CORT) is acknowledged to induce neuronal damage in a number of regions of the brain, particularly the hippocampus, the main area implicated in depression. However, little research has been conducted on alterations to hypothalamic neurons in depression and the cellular and molecular basis for these changes. In the present study, we aimed to determine whether CORT causes apoptosis in primary cultured hypothalamic neurons, and to investigate the protective effects of icariin, an active natural ingredient from the Chinese plant, Epimedium sagittatum Maxim. Our study demonstrates that exposure of hypothalamic neurons to CORT causes a significant loss in viability, a significant decrease in mitochondrial membrane potential, an increase in caspase-3 activity, an elevation in intracellular reactive oxygen species elevation and decreased superoxide dismutase activity. However, pretreatment of cells with icariin prior to CORT exposure was identified to noticeably suppress these CORT-induced events. Furthermore, icariin may prevent CORT-induced cell death via activation of the PI3-K/Akt pathway. In conclusion, icariin is able to prevent CORT-induced hypothalamic cell apoptosis via activation of the PI3-K/Akt pathway.
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Affiliation(s)
- Hongying Zhang
- Laboratory of Lung, Inflammation and Cancers, Huashan Hospital, Fudan University, Shanghai 200040, PR China
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Tajiri M, Hayata-Takano A, Seiriki K, Ogata K, Hazama K, Shintani N, Baba A, Hashimoto H. Serotonin 5-HT7 Receptor Blockade Reverses Behavioral Abnormalities in PACAP-Deficient Mice and Receptor Activation Promotes Neurite Extension in Primary Embryonic Hippocampal Neurons. J Mol Neurosci 2012; 48:473-81. [DOI: 10.1007/s12031-012-9861-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 07/16/2012] [Indexed: 12/30/2022]
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Involvement of 5-HT7 receptors in the pathogenesis of temporal lobe epilepsy. Eur J Pharmacol 2012; 685:52-8. [DOI: 10.1016/j.ejphar.2012.04.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 04/04/2012] [Accepted: 04/05/2012] [Indexed: 11/21/2022]
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