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Zhang KK, Yang JZ, Cheng CH, Wan JY, Chen YC, Zhou HQ, Zheng DK, Lan ZX, You QH, Wang Q, Sun J. Short-chain fatty acids mitigate Methamphetamine-induced hepatic injuries in a Sigma-1 receptor-dependent manner. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 280:116538. [PMID: 38833980 DOI: 10.1016/j.ecoenv.2024.116538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/08/2024] [Accepted: 05/31/2024] [Indexed: 06/06/2024]
Abstract
Methamphetamine (Meth) is a potent psychostimulant with well-established hepatotoxicity. Gut microbiota-derived short-chain fatty acids (SCFAs) have been reported to yield beneficial effects on the liver. In this study, we aim to further reveal the mechanisms of Meth-induced hepatic injuries and investigate the potential protective effects of SCFAs. Herein, mice were intraperitoneally injected with 15 mg/kg Meth to induce hepatic injuries. The composition of fecal microbiota and SCFAs was profiled using 16 S rRNA sequencing and Gas Chromatography/Mass Spectrometry (GC/MS) analysis, respectively. Subsequently, SCFAs supplementation was performed to evaluate the protective effects against hepatic injuries. Additionally, Sigma-1 receptor knockout (S1R-/-) mice and fluvoxamine (Flu), an agonist of S1R, were introduced to investigate the mechanisms underlying the protective effects of SCFAs. Our results showed that Meth activated S1R and induced hepatic autophagy, inflammation, and oxidative stress by stimulating the MAPK/ERK pathway. Meanwhile, Meth disrupted SCFAs product-related microbiota, leading to a reduction in fecal SCFAs (especially Acetic acid and Propanoic acid). Accompanied by the optimization of gut microbiota, SCFAs supplementation normalized S1R expression and ameliorated Meth-induced hepatic injuries by repressing the MAPK/ERK pathway. Effectively, S1R knockout repressed Meth-induced activation of the MAPK/ERK pathway and further ameliorated hepatic injuries. Finally, the overexpression of S1R stimulated the MAPK/ERK pathway and yielded comparable adverse phenotypes to Meth administration. These findings suggest that Meth-induced hepatic injuries relied on the activation of S1R, which could be alleviated by SCFAs supplementation. Our study confirms the crucial role of S1R in Meth-induced hepatic injuries for the first time and provides a potential preemptive therapy.
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Affiliation(s)
- Kai-Kai Zhang
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China; Guangzhou Key Laboratory of Forensic Multi-Omics for Precision Identification, School of Forensic Medicine, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Jian-Zheng Yang
- Guangzhou Key Laboratory of Forensic Multi-Omics for Precision Identification, School of Forensic Medicine, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Chang-Hao Cheng
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Jia-Yuan Wan
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Yu-Chuan Chen
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - He-Qi Zhou
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - De-Kai Zheng
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Zhi-Xian Lan
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Qiu-Hong You
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Qi Wang
- Guangzhou Key Laboratory of Forensic Multi-Omics for Precision Identification, School of Forensic Medicine, Southern Medical University, Guangzhou, Guangdong 510515, China.
| | - Jian Sun
- State Key Laboratory of Organ Failure Research; Key Laboratory of Infectious Diseases Research in South China, Ministry of Education; Guangdong Provincial Key Laboratory of Viral Hepatitis Research; Guangdong Provincial Clinical Research Center for Viral Hepatitis; Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China.
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2
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Bai P, Bagdasarian FA, Xu Y, Wang Y, Wang Y, Gomm A, Zhou Y, Wu R, Wey HY, Tanzi RE, Zhang C, Lan Y, Wang C. Molecular Imaging of Alzheimer's Disease-Related Sigma-1 Receptor in the Brain via a Novel Ru-Mediated Aromatic 18F-deoxyfluorination Probe. J Med Chem 2024; 67:6207-6217. [PMID: 38607332 DOI: 10.1021/acs.jmedchem.3c02178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Sigma-1 receptor (σ1R) is an intracellular protein implicated in a spectrum of neurodegenerative conditions, notably Alzheimer's disease (AD). Positron emission tomography (PET) imaging of brain σ1R could provide a powerful tool for better understanding the underlying pathomechanism of σ1R in AD. In this study, we successfully developed a 18F-labeled σ1R radiotracer [18F]CNY-05 via an innovative ruthenium (Ru)-mediated 18F-deoxyfluorination method. [18F]CNY-05 exhibited preferable brain uptake, high specific binding, and slightly reversible pharmacokinetics within the PET scanning time window. PET imaging of [18F]CNY-05 in nonhuman primates (NHP) indicated brain permeability, metabolic stability, and safety. Moreover, autoradiography and PET studies of [18F]CNY-05 in the AD mouse model found a significantly decreased brain uptake compared to that in wild-type mice. Collectively, we have provided a novel 18F-radiolabeled σ1R PET probe, which enables visualizing brain σ1R in health and neurological diseases.
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Affiliation(s)
- Ping Bai
- Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- Institute of Respiratory Health, Targeted Tracer Research and Development Laboratory, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- Precision Medicine Center, Precision Medicine Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- The Research Units of West China, Chinese Academy of Medical Sciences, West China Hospital, Chengdu, Sichuan 610041, China
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Chengdu, Sichuan 610041, China
| | - Frederick A Bagdasarian
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Yulong Xu
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Yanli Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Yongle Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Ashley Gomm
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, 114 16th Street, Charlestown, Massachusetts 02129, United States
| | - Yanting Zhou
- Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- Institute of Respiratory Health, Targeted Tracer Research and Development Laboratory, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- Precision Medicine Center, Precision Medicine Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- The Research Units of West China, Chinese Academy of Medical Sciences, West China Hospital, Chengdu, Sichuan 610041, China
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Chengdu, Sichuan 610041, China
| | - Rui Wu
- Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- Institute of Respiratory Health, Targeted Tracer Research and Development Laboratory, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- Precision Medicine Center, Precision Medicine Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- The Research Units of West China, Chinese Academy of Medical Sciences, West China Hospital, Chengdu, Sichuan 610041, China
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Chengdu, Sichuan 610041, China
| | - Hsiao-Ying Wey
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Rudolph E Tanzi
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, 114 16th Street, Charlestown, Massachusetts 02129, United States
| | - Can Zhang
- Genetics and Aging Research Unit, McCance Center for Brain Health, MassGeneral Institute for Neurodegenerative Disease, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, 114 16th Street, Charlestown, Massachusetts 02129, United States
| | - Yu Lan
- Department of Pharmacy, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Changning Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
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3
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Siddiqui T, Bhatt LK. Targeting Sigma-1 Receptor: A Promising Strategy in the Treatment of Parkinson's Disease. Neurochem Res 2023; 48:2925-2935. [PMID: 37259012 PMCID: PMC10231286 DOI: 10.1007/s11064-023-03960-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/16/2023] [Accepted: 05/23/2023] [Indexed: 06/02/2023]
Abstract
Parkinson's disease is a neurodegenerative disease affecting mainly the elderly population. It is characterized by the loss of dopaminergic neurons of the substantia nigra pars compacta region. Parkinson's disease patients exhibit motor symptoms like tremors, rigidity, bradykinesia/hypokinesia, and non-motor symptoms like depression, cognitive decline, delusion, and pain. Major pathophysiological factors which contribute to neuron loss include excess/misfolded alpha-synuclein aggregates, microglial cell-mediated neuroinflammation, excitotoxicity, oxidative stress, and defective mitochondrial function. Sigma-1 receptors are molecular chaperones located at mitochondria-associated ER membrane. Their activation (by endogenous ligands or agonists) has shown neuroprotective and neurorestorative effects in various diseases. This review discusses the roles of activated Sig-1 receptors in modulating various pathophysiological features of Parkinson's disease like alpha-synuclein aggregates, neuroinflammation, excitotoxicity, and oxidative stress.
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Affiliation(s)
- Talha Siddiqui
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Vile Parle (West), Mumbai, 400056, India
| | - Lokesh Kumar Bhatt
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Vile Parle (West), Mumbai, 400056, India.
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4
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Wang YM, Xia CY, Jia HM, He J, Lian WW, Yan Y, Wang WP, Zhang WK, Xu JK. Sigma-1 receptor: A potential target for the development of antidepressants. Neurochem Int 2022; 159:105390. [PMID: 35810915 DOI: 10.1016/j.neuint.2022.105390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 06/10/2022] [Accepted: 07/05/2022] [Indexed: 10/17/2022]
Abstract
Though a great many of studies on the development of antidepressants for the therapy of major depression disorder (MDD) and the development of antidepressants have been carried out, there still lacks an efficient approach in clinical practice. The involvement of Sigma-1 receptor in the pathological process of MDD has been verified. In this review, recent research focusing on the role of Sigma-1 receptor in the etiology of MDD were summarized. Preclinical studies and clinical trials have found that stress induce the variation of Sigma-1 receptor in the blood, brain and heart. Dysfunction and absence of Sigma-1 receptor result in depressive-like behaviors in rodent animals. Agonists of Sigma-1 receptor show not only antidepressant-like activities but also therapeutical effects in complications of depression. The mechanisms underlying antidepressant-like effects of Sigma-1 receptor may include suppressing neuroinflammation, regulating neurotransmitters, ameliorating brain-derived neurotrophic factor and N-Methyl-D-Aspartate receptor, and alleviating the endoplasmic reticulum stress and mitochondria damage during stress. Therefore, Sigma-1 receptor represents a potential target for antidepressants development.
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Affiliation(s)
- Yu-Ming Wang
- School of Life Sciences & School of Chinese Medicine Sciences, Beijing University of Chinese Medicine, Beijing, 100029, PR China; Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, PR China
| | - Cong-Yuan Xia
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, PR China
| | - Hong-Mei Jia
- Key Laboratory of Radiopharmaceuticals (Beijing Normal University), Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, PR China
| | - Jun He
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, PR China
| | - Wen-Wen Lian
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, PR China
| | - Yu Yan
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, PR China
| | - Wen-Ping Wang
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, PR China
| | - Wei-Ku Zhang
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, PR China.
| | - Jie-Kun Xu
- School of Life Sciences & School of Chinese Medicine Sciences, Beijing University of Chinese Medicine, Beijing, 100029, PR China.
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5
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Hirata Y, Oka K, Yamamoto S, Watanabe H, Oh-Hashi K, Hirayama T, Nagasawa H, Takemori H, Furuta K. Haloperidol Prevents Oxytosis/Ferroptosis by Targeting Lysosomal Ferrous Ions in a Manner Independent of Dopamine D2 and Sigma-1 Receptors. ACS Chem Neurosci 2022; 13:2719-2727. [PMID: 36050287 DOI: 10.1021/acschemneuro.2c00398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Haloperidol is a widely used antipsychotic agent that exerts antipsychotic effects through a strong antagonism of dopamine D2 receptors. In addition, haloperidol is classified as a sigma-1 receptor (S1R) antagonist that prevents endogenous oxidative stress in cultured cells. However, pharmacological activities of haloperidol against oxidative stress remain unclear. Oxytosis/ferroptosis are iron-dependent nonapoptotic oxidative cell deaths that are regarded as two names for the same cell death pathway and the potential physiological relevance of oxytosis/ferroptosis in multiple diseases is suggested. In the present study, the effects of haloperidol on oxytosis/ferroptosis were investigated in S1R-knockdown mouse hippocampal HT22 cells. The results indicate that haloperidol is a strong inhibitor of oxytosis/ferroptosis independent of S1R. Imaging of HT22 cells with a newly developed fluorescent probe showed that haloperidol was localized to late endosomes and lysosomes and reduced the accumulation of lysosomal ferrous ions, resulting in reduced production of intracellular reactive oxygen species and inhibition of cell death. These results indicate that haloperidol is useful not only as an antipsychotic agent but also as a neuroprotective agent against endogenous oxidative stress via distinct mechanisms. Furthermore, lysosome-targeting ferroptosis inhibitors could be useful for the treatment of various diseases, including cancers, ischemia-reperfusion injury, and neurodegenerative disorders, which have been associated with ferroptosis.
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Affiliation(s)
- Yoko Hirata
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Graduate School of Natural Science and Technology, Gifu University, Gifu 501-1193, Japan.,United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan
| | - Kohei Oka
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Shotaro Yamamoto
- Graduate School of Natural Science and Technology, Gifu University, Gifu 501-1193, Japan
| | - Hiroki Watanabe
- Graduate School of Natural Science and Technology, Gifu University, Gifu 501-1193, Japan
| | - Kentaro Oh-Hashi
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Graduate School of Natural Science and Technology, Gifu University, Gifu 501-1193, Japan.,United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan
| | - Tasuku Hirayama
- Laboratory of Pharmaceutical and Medicinal Chemistry, Gifu Pharmaceutical University, Gifu 501-1196, Japan
| | - Hideko Nagasawa
- Laboratory of Pharmaceutical and Medicinal Chemistry, Gifu Pharmaceutical University, Gifu 501-1196, Japan
| | - Hiroshi Takemori
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Graduate School of Natural Science and Technology, Gifu University, Gifu 501-1193, Japan.,United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan
| | - Kyoji Furuta
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Graduate School of Natural Science and Technology, Gifu University, Gifu 501-1193, Japan.,United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan
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6
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Rodríguez LR, Lapeña-Luzón T, Benetó N, Beltran-Beltran V, Pallardó FV, Gonzalez-Cabo P, Navarro JA. Therapeutic Strategies Targeting Mitochondrial Calcium Signaling: A New Hope for Neurological Diseases? Antioxidants (Basel) 2022; 11:antiox11010165. [PMID: 35052668 PMCID: PMC8773297 DOI: 10.3390/antiox11010165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 12/13/2022] Open
Abstract
Calcium (Ca2+) is a versatile secondary messenger involved in the regulation of a plethora of different signaling pathways for cell maintenance. Specifically, intracellular Ca2+ homeostasis is mainly regulated by the endoplasmic reticulum and the mitochondria, whose Ca2+ exchange is mediated by appositions, termed endoplasmic reticulum-mitochondria-associated membranes (MAMs), formed by proteins resident in both compartments. These tethers are essential to manage the mitochondrial Ca2+ influx that regulates the mitochondrial function of bioenergetics, mitochondrial dynamics, cell death, and oxidative stress. However, alterations of these pathways lead to the development of multiple human diseases, including neurological disorders, such as amyotrophic lateral sclerosis, Friedreich's ataxia, and Charcot-Marie-Tooth. A common hallmark in these disorders is mitochondrial dysfunction, associated with abnormal mitochondrial Ca2+ handling that contributes to neurodegeneration. In this work, we highlight the importance of Ca2+ signaling in mitochondria and how the mechanism of communication in MAMs is pivotal for mitochondrial maintenance and cell homeostasis. Lately, we outstand potential targets located in MAMs by addressing different therapeutic strategies focused on restoring mitochondrial Ca2+ uptake as an emergent approach for neurological diseases.
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Affiliation(s)
- Laura R. Rodríguez
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
- Correspondence: (L.R.R.); (P.G.-C.); (J.A.N.)
| | - Tamara Lapeña-Luzón
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
| | - Noelia Benetó
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
| | - Vicent Beltran-Beltran
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
| | - Federico V. Pallardó
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
| | - Pilar Gonzalez-Cabo
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
- Correspondence: (L.R.R.); (P.G.-C.); (J.A.N.)
| | - Juan Antonio Navarro
- Department of Genetics, Universitat de València-INCLIVA, 46100 Valencia, Spain
- INCLIVA Biomedical Research Institute, 46010 Valencia, Spain
- Correspondence: (L.R.R.); (P.G.-C.); (J.A.N.)
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7
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Shi M, Chen F, Chen Z, Yang W, Yue S, Zhang J, Chen X. Sigma-1 Receptor: A Potential Therapeutic Target for Traumatic Brain Injury. Front Cell Neurosci 2021; 15:685201. [PMID: 34658788 PMCID: PMC8515188 DOI: 10.3389/fncel.2021.685201] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 09/13/2021] [Indexed: 12/29/2022] Open
Abstract
The sigma-1 receptor (Sig-1R) is a chaperone receptor that primarily resides at the mitochondria-associated endoplasmic reticulum (ER) membrane (MAM) and acts as a dynamic pluripotent modulator regulating cellular pathophysiological processes. Multiple pharmacological studies have confirmed the beneficial effects of Sig-1R activation on cellular calcium homeostasis, excitotoxicity modulation, reactive oxygen species (ROS) clearance, and the structural and functional stability of the ER, mitochondria, and MAM. The Sig-1R is expressed broadly in cells of the central nervous system (CNS) and has been reported to be involved in various neurological disorders. Traumatic brain injury (TBI)-induced secondary injury involves complex and interrelated pathophysiological processes such as cellular apoptosis, glutamate excitotoxicity, inflammatory responses, endoplasmic reticulum stress, oxidative stress, and mitochondrial dysfunction. Thus, given the pluripotent modulation of the Sig-1R in diverse neurological disorders, we hypothesized that the Sig-1R may affect a series of pathophysiology after TBI. This review summarizes the current knowledge of the Sig-1R, its mechanistic role in various pathophysiological processes of multiple CNS diseases, and its potential therapeutic role in TBI.
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Affiliation(s)
- Mingming Shi
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.,Department of Neurosurgery, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.,Department of Neurosurgery, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Fanglian Chen
- Department of Neurosurgery, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.,Department of Neurosurgery, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Zhijuan Chen
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Weidong Yang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Shuyuan Yue
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Jianning Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.,Department of Neurosurgery, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.,Department of Neurosurgery, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Xin Chen
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.,Department of Neurosurgery, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, China.,Department of Neurosurgery, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
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8
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Ramaswamy P, Dalavaikodihalli Nanjaiah N, Prasad C, Goswami K. Transcriptional modulation of calcium-permeable AMPA receptor subunits in glioblastoma by MEK-ERK1/2 inhibitors and their role in invasion. Cell Biol Int 2019; 44:830-837. [PMID: 31814223 DOI: 10.1002/cbin.11279] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 12/05/2019] [Indexed: 11/09/2022]
Abstract
Glioblastoma is the most common primary brain tumor. Glioblastoma cells secrete a significant amount of glutamate, which serve as a potential growth factor in glioma pathobiology through their specific receptor subtypes including α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR). Glioblastoma express AMPAR subunits; however, its regulation and activation with downstream intracellular signaling are not well-understood. Phosphorylated-extracellular signaling-regulated kinase (ERK)1/2 is known to regulate the ionotropic glutamate receptors in cortical neurons. The mitogen-activated protein kinase cascade is frequently activated in several tumors, including glioma. Nonetheless, the association of ERK signaling with AMPAR subunits in glioblastoma is undetermined. Here, we demonstrated potential role of AMPAR in invasion, and the modulation of AMPAR subunits at transcript level by ERK signaling in glioblastoma cells. Inhibition of ERK signaling specifically downregulated the expression of calcium-permeable AMPAR subunits, GluA1 and GluA4, and upregulated calcium-impermeable AMPAR subunit GluA2 implying differential regulation of the expression of calcium-permeable AMPAR subunits of glioblastoma. Concomitantly, it significantly decreased the invasion of U87MG cells. Taken together, these findings suggest that the AMPAR enhances invasion of glioblastoma, and ERK signaling modulates the differential expression of calcium-permeable AMPAR phenotype that might play a crucial role in the invasive propensity of glioblastoma cells.
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Affiliation(s)
- Palaniswamy Ramaswamy
- Department of Neurochemistry, National Institute of Mental Health and Neuro Sciences (NIMHANS), Bengaluru, 560029, India
| | | | - Chandrajit Prasad
- Department of Neuroimaging and Intervention Radiology, National Institute of Mental Health and Neuro Sciences (NIMHANS), Bengaluru, 560029, India
| | - Kalyan Goswami
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), Raipur, 492099, India
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9
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Wang Y, Zhao CS. Sigma-1 receptor activation ameliorates LPS-induced NO production and ROS formation through the Nrf2/HO-1 signaling pathway in cultured astrocytes. Neurosci Lett 2019; 711:134387. [PMID: 31330223 DOI: 10.1016/j.neulet.2019.134387] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 04/26/2019] [Accepted: 07/17/2019] [Indexed: 12/16/2022]
Abstract
Accumulating evidence has shown that astrocytes play a critical role in neuroinflammation and protection against oxidative stress. In this study, we investigated the effects of sigma-1 receptor (Sig-1R) activation on lipopolysaccharide (LPS)-induced inflammatory reactions and oxidative/nitrosative stress in cultured astrocytes. We found that SA4503, a selective Sig-1R agonist, attenuated LPS-induced inflammatory reactions and oxidative/nitrosative stress by downregulating the expression of iNOS and tumor necrosis factor α (TNF-α) and upregulating glutathione (GSH) in cultured astrocytes. To investigate the mechanism by which SA4503 caused these effects, we then examined the expression of nuclear factor erythroid-derived 2-like 2 (Nrf2) and heme oxygenase-1 (HO-1) through western blotting. The results revealed that SA4503 treatment increased Nrf2 and HO-1 expression significantly. These results suggested that the antioxidative/nitrosative stress and anti-inflammatory effects of Sig-1R activation in astrocytes were partially mediated by Nrf2 and HO-1 activation.
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Affiliation(s)
- Ying Wang
- Department of Neurology, The first affiliated hospital of China Medical University, Shenyang, China; Department of Neurology, The first affiliated hospital of Dalian Medical University, Dalian, China
| | - Chuan-Sheng Zhao
- Department of Neurology, The first affiliated hospital of China Medical University, Shenyang, China.
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10
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Yamamoto G, Kamiya Y, Sasaki M, Ikoma M, Baba H, Kohno T. Neurosteroid dehydroepiandrosterone sulphate enhances pain transmission in rat spinal cord dorsal horn. Br J Anaesth 2019; 123:e215-e225. [PMID: 31030988 DOI: 10.1016/j.bja.2019.03.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 03/04/2019] [Accepted: 03/21/2019] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND The neurosteroid dehydroepiandrosterone sulphate (DHEAS) activates the sigma-1 receptor, inhibits gamma-aminobutyric acid A (GABAA) and glycine receptors, and induces hyperalgesic effects. Although its effects have been studied in various tissues of the nervous system, its synaptic mechanisms in nociceptive pathways remain to be elucidated. METHODS The threshold of mechanical hypersensitivity and spontaneous pain behaviour was assessed using the von Frey test in adult male Wistar rats after intrathecal administration of DHEAS. We also investigated the effects of DHEAS on synaptic transmission in the spinal dorsal horn using slice patch-clamp electrophysiology. RESULTS Intrathecally administered DHEAS elicited dose-dependent mechanical hyperalgesia and spontaneous pain behaviours (withdrawal threshold: saline; 51.0 [20.1] g, 3 μg DHEAS; 14.0 [7.8] g, P<0.01, 10 μg DHEAS; 6.9 [5.2] g, 15 min after administration, P<0.001). DHEAS at 100 μM increased the frequency of miniature postsynaptic currents in the rat dorsal spinal horn; this increase was extracellular Ca2+-dependent but not sigma-1 and N-methyl-d-aspartate receptor-dependent. DHEAS suppressed the frequency of miniature inhibitory postsynaptic currents in a GABAA receptor- and sigma-1 receptor-dependent manner. CONCLUSIONS These results suggest that DHEAS participates in the pathophysiology of nociceptive synaptic transmission in the spinal cord by potentiation of glutamate release and inhibition of the GABAA receptor.
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Affiliation(s)
- Goh Yamamoto
- Division of Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata City, Japan
| | - Yoshinori Kamiya
- Division of Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata City, Japan.
| | - Mika Sasaki
- Division of Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata City, Japan
| | - Miho Ikoma
- Division of Palliative Medicine, Department of Medical Oncology, Niigata University Medical and Dental Hospital, Niigata City, Japan
| | - Hiroshi Baba
- Division of Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata City, Japan
| | - Tatsuro Kohno
- Division of Anesthesiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata City, Japan; Department of Anesthesiology, Tohoku Medical and Pharmaceutical University, Sendai City, Japan
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11
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Ona G, Troncoso S. Long-lasting analgesic effect of the psychedelic drug changa: A case report. JOURNAL OF PSYCHEDELIC STUDIES 2019. [DOI: 10.1556/2054.2019.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Genís Ona
- Department of Anthropology, Philosophy and Social Work, Universitat Rovira i Virgili, Tarragona, Spain
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12
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Cao Z, Xiao Q, Dai X, Zhou Z, Jiang R, Cheng Y, Yang X, Guo H, Wang J, Xi Z, Yao H, Chao J. circHIPK2-mediated σ-1R promotes endoplasmic reticulum stress in human pulmonary fibroblasts exposed to silica. Cell Death Dis 2017; 8:3212. [PMID: 29238093 PMCID: PMC5870587 DOI: 10.1038/s41419-017-0017-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 09/16/2017] [Accepted: 10/02/2017] [Indexed: 12/16/2022]
Abstract
Silicosis is characterized by fibroblast accumulation and excessive deposition of extracellular matrix. Although the roles of SiO2-induced chemokines and cytokines released from alveolar macrophages have received significant attention, the direct effects of SiO2 on protein production and functional changes in pulmonary fibroblasts have been less extensively studied. Sigma-1 receptor, which has been associated with cell proliferation and migration in the central nervous system, is expressed in the lung, but its role in silicosis remains unknown. To elucidate the role of sigma-1 receptor in fibrosis induced by silica, both the upstream molecular mechanisms and the functional effects on cell proliferation and migration were investigated. Both molecular biological assays and pharmacological techniques, combined with functional experiments, such as migration and proliferation, were applied in human pulmonary fibroblasts from adults to analyze the molecular and functional changes induced by SiO2. SiO2 induced endoplasmic reticulum stress in association with enhanced expression of sigma-1 receptor. Endoplasmic reticulum stress promoted migration and proliferation of human pulmonary fibroblasts-adult exposed to SiO2, inducing the development of silicosis. Inhibition of sigma-1 receptor ameliorated endoplasmic reticulum stress and fibroblast functional changes induced by SiO2. circHIPK2 is involved in the regulation of sigma-1 receptor in human pulmonary fibroblasts-adult exposed to SiO2. Our study elucidated a link between SiO2-induced fibrosis and sigma-1 receptor signaling, thereby providing novel insight into the potential use of sigma-1 receptor/endoplasmic reticulum stress in the development of novel therapeutic strategies for silicosis treatment.
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Affiliation(s)
- Zhouli Cao
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
- Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China
- Department of Respiration, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Qingling Xiao
- Third Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Xiaoniu Dai
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Zewei Zhou
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Rong Jiang
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
- Department of Respiration, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Yusi Cheng
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Xiyue Yang
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
- Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China
| | - Huifang Guo
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
- Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China
| | - Jing Wang
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Zhaoqing Xi
- Third Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Honghong Yao
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
- Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China
| | - Jie Chao
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China.
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China.
- Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China.
- Department of Respiration, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China.
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13
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Zhao J, Mysona BA, Wang J, Gonsalvez GB, Smith SB, Bollinger KE. Sigma 1 receptor regulates ERK activation and promotes survival of optic nerve head astrocytes. PLoS One 2017; 12:e0184421. [PMID: 28898265 PMCID: PMC5595338 DOI: 10.1371/journal.pone.0184421] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 08/23/2017] [Indexed: 11/18/2022] Open
Abstract
The sigma 1 receptor (S1R) is a unique transmembrane protein that has been shown to regulate neuronal differentiation and cellular survival. It is expressed within several cell types throughout the nervous system and visceral organs, including neurons and glia within the eye. S1R ligands are therapeutic targets for diseases ranging from neurodegenerative conditions to neoplastic disorders. However, effects of S1R activation and inhibition within glia cells are not well characterized. Within the eye, the astrocytes at the optic nerve head are crucial to the health and survival of the neurons that send visual information to the brain. In this study, we used the S1R-specific agonist, (+)-pentazocine, to evaluate S1R activation within optic nerve head-derived astrocytes (ONHAs). Treatment of ONHAs with (+)-pentazocine attenuated the level and duration of stress-induced ERK phosphorylation following oxidative stress exposure and promoted survival of ONHAs. These effects were specific to S1R activation because they were not observed in ONHAs that were depleted of S1R using siRNA-mediated knockdown. Collectively, our results suggest that S1R activation suppresses ERK1/2 phosphorylation and protects ONHAs from oxidative stress-induced death.
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Affiliation(s)
- Jing Zhao
- James and Jean Culver Vision Discovery Institute, Augusta, Georgia, United States of America
- Department of Ophthalmology, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
| | - Barbara A. Mysona
- James and Jean Culver Vision Discovery Institute, Augusta, Georgia, United States of America
- Department of Ophthalmology, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
| | - Jing Wang
- James and Jean Culver Vision Discovery Institute, Augusta, Georgia, United States of America
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
| | - Graydon B. Gonsalvez
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
| | - Sylvia B. Smith
- James and Jean Culver Vision Discovery Institute, Augusta, Georgia, United States of America
- Department of Ophthalmology, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
| | - Kathryn E. Bollinger
- James and Jean Culver Vision Discovery Institute, Augusta, Georgia, United States of America
- Department of Ophthalmology, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States of America
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14
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Carbone C, Arena E, Pepe V, Prezzavento O, Cacciatore I, Turkez H, Marrazzo A, Di Stefano A, Puglisi G. Nanoencapsulation strategies for the delivery of novel bifunctional antioxidant/σ1 selective ligands. Colloids Surf B Biointerfaces 2017; 155:238-247. [PMID: 28432957 DOI: 10.1016/j.colsurfb.2017.04.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 04/07/2017] [Accepted: 04/10/2017] [Indexed: 11/15/2022]
Abstract
Nowadays sigma-1 receptors are considered as new therapeutic objectives for central nervous system neurodegenerative diseases. Among different molecules, alpha lipoic acid has been identified as a natural potent antioxidant drug, whose therapeutic efficacy is limited by its many drawbacks, such as fast metabolism, poor bioavailability and high physico-chemical instability. Alfa-lipoic acid derivatives have been recently developed demonstrating their neuroprotective activity and effectiveness in different types of oxidative stress. In this work, two derivatives containing an amide or an ester functional group with different lipophilicity, were selected for their important affinity for sigma-1 receptors. Herein, in order to improve the in vitro stability and antioxidant effectiveness of alpha-lipoic acid derivatives, we focused our efforts in the nanoencapsulation strategies. Aqueous-core nanocapsules for the delivery of the hydrophilic compound and nanostructured lipid carrier for the lipophilic derivative, were properly designed and prepared using a direct or inverse eco-friendly organic solvent-free procedure. All nanosystems were characterized in terms of mean size, polydispersity, stability, morphology, encapsulation efficiency and in vitro release profiles. In order to evaluate the nanocarriers biocompatibility and antioxidant effectiveness, in vitro biological studies (cell viability, total antioxidant capacity and total oxidative status) were developed on primary human whole blood cell cultures, on both unloaded and derivatives-loaded nanodevices.
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Affiliation(s)
- Claudia Carbone
- Department of Drug Sciences, University of Catania, v.le A. Doria 6, 95100, Catania, Italy.
| | - Emanuela Arena
- Department of Drug Sciences, University of Catania, v.le A. Doria 6, 95100, Catania, Italy
| | - Veronica Pepe
- Department of Drug Sciences, University of Catania, v.le A. Doria 6, 95100, Catania, Italy
| | - Orazio Prezzavento
- Department of Drug Sciences, University of Catania, v.le A. Doria 6, 95100, Catania, Italy
| | - Ivana Cacciatore
- Department of Pharmacy, University G. d'Annunzio Chieti-Pescara, Via dei Vestini 31, 66100, Chieti, Italy
| | - Hasan Turkez
- Department of Pharmacy, University G. d'Annunzio Chieti-Pescara, Via dei Vestini 31, 66100, Chieti, Italy; Department of Molecular Biology and Genetics, Erzurum Technical University, Erzurum 25240, Turkey
| | - Agostino Marrazzo
- Department of Drug Sciences, University of Catania, v.le A. Doria 6, 95100, Catania, Italy
| | - Antonio Di Stefano
- Department of Pharmacy, University G. d'Annunzio Chieti-Pescara, Via dei Vestini 31, 66100, Chieti, Italy
| | - Giovanni Puglisi
- Department of Drug Sciences, University of Catania, v.le A. Doria 6, 95100, Catania, Italy
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15
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Nguyen L, Lucke-Wold BP, Mookerjee S, Kaushal N, Matsumoto RR. Sigma-1 Receptors and Neurodegenerative Diseases: Towards a Hypothesis of Sigma-1 Receptors as Amplifiers of Neurodegeneration and Neuroprotection. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 964:133-152. [PMID: 28315269 PMCID: PMC5500918 DOI: 10.1007/978-3-319-50174-1_10] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Sigma-1 receptors are molecular chaperones that may act as pathological mediators and targets for novel therapeutic applications in neurodegenerative diseases. Accumulating evidence indicates that sigma-1 ligands can either directly or indirectly modulate multiple neurodegenerative processes, including excitotoxicity, calcium dysregulation, mitochondrial and endoplasmic reticulum dysfunction, inflammation, and astrogliosis. In addition, sigma-1 ligands may act as disease-modifying agents in the treatment for central nervous system (CNS) diseases by promoting the activity of neurotrophic factors and neural plasticity. Here, we summarize their neuroprotective and neurorestorative effects in different animal models of acute brain injury and chronic neurodegenerative diseases, and highlight their potential role in mitigating disease. Notably, current data suggest that sigma-1 receptor dysfunction worsens disease progression, whereas enhancement amplifies pre-existing functional mechanisms of neuroprotection and/or restoration to slow disease progression. Collectively, the data support a model of the sigma-1 receptor as an amplifier of intracellular signaling, and suggest future clinical applications of sigma-1 ligands as part of multi-therapy approaches to treat neurodegenerative diseases.
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Affiliation(s)
- Linda Nguyen
- Department of Behavioral Medicine and Psychiatry, School of Medicine, West Virginia University, 930 Chestnut Ridge Road, Morgantown, WV, 26506, USA
- Department of Pharmaceutical Sciences, School of Pharmacy, One Medical Center, West Virginia University, Morgantown, WV, 26506, USA
| | - Brandon P Lucke-Wold
- Graduate Program in Neuroscience, School of Medicine, West Virginia University, One Medical Center Drive, Morgantown, WV, 26506, USA
| | - Shona Mookerjee
- College of Pharmacy, Touro University California, 1310 Club Drive, Vallejo, CA, 94592, USA
| | | | - Rae R Matsumoto
- Department of Behavioral Medicine and Psychiatry, School of Medicine, West Virginia University, 930 Chestnut Ridge Road, Morgantown, WV, 26506, USA.
- College of Pharmacy, Touro University California, 1310 Club Drive, Vallejo, CA, 94592, USA.
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16
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Mancuso R, Navarro X. Sigma-1 Receptor in Motoneuron Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 964:235-254. [PMID: 28315275 DOI: 10.1007/978-3-319-50174-1_16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Amyotrophic Lateral Sclerosis (ALS ) is a neurodegenerative disease affecting spinal cord and brain motoneurons , leading to paralysis and early death. Multiple etiopathogenic mechanisms appear to contribute in the development of ALS , including glutamate excitotoxicity, oxidative stress , protein misfolding, mitochondrial defects, impaired axonal transport, inflammation and glial cell alterations. The Sigma-1 receptor is highly expressed in motoneurons of the spinal cord, particularly enriched in the endoplasmic reticulum (ER) at postsynaptic cisternae of cholinergic C-terminals. Several evidences point to participation of Sigma-1R alterations in motoneuron degeneration. Thus, mutations of the transmembrane domain of the Sigma-1R have been described in familial ALS cases. Interestingly, Sigma-1R KO mice display muscle weakness and motoneuron loss. On the other hand, Sigma-1R agonists promote neuroprotection and neurite elongation through activation of protein kinase C on motoneurons in vitro and in vivo after ventral root avulsion. Remarkably, treatment of SOD1 mice, the most usual animal model of ALS , with Sigma-1R agonists resulted in significantly enhanced motoneuron function and preservation, and increased animal survival. Sigma-1R activation also reduced microglial reactivity and increased the glial expression of neurotrophic factors. Two main interconnected mechanisms seem to underlie the effects of Sigma-1R manipulation on motoneurons: modulation of neuronal excitability and regulation of calcium homeostasis. In addition, Sigma-1R also contributes to regulating protein degradation, and reducing oxidative stress. Therefore, the multi-functional nature of the Sigma-1R represents an attractive target for treating aspects of ALS and other motoneuron diseases .
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Affiliation(s)
- Renzo Mancuso
- Center for Biological Sciences, University of Southampton, Southampton General Hospital, SO16 6YD, Southampton, UK
| | - Xavier Navarro
- Institute of Neurosciences and Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain.
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17
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Kasahara R, Yamamoto N, Suzuki K, Sobue K. The σ1 receptor regulates accumulation of GM1 ganglioside-enriched autophagosomes in astrocytes. Neuroscience 2016; 340:176-187. [PMID: 27815022 DOI: 10.1016/j.neuroscience.2016.10.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 10/24/2016] [Accepted: 10/24/2016] [Indexed: 02/04/2023]
Abstract
GM1 gangliosides (GM1) are acidic glycosphingolipids that are present in cell membranes and lipid raft domains, being particularly abundant in central nervous systems. GM1 participate in modulating cell membrane properties, intercellular recognition, cell regulation, and signaling. We previously demonstrated that GM1 are expressed inside astrocytes but not on the cell surface. We investigated whether the antipsychotic drug haloperidol induces GM1 expression in astrocytes, and found that the expression of GM1 was significantly upregulated by haloperidol in the intracellular vesicles of cultured astrocytes. The effects of haloperidol on GM1 expression acted through the σ1 receptor (σ1R), but not the dopamine-2 receptor. Inhibition of the ERK pathway blocked the induction of GM1 through the σ1R by haloperidol. Interestingly, this increase in GM1 expression induced the accumulation of autophagosomes in astrocytes. Moreover, the effect of haloperidol on the σ1R induced a decrease in GM1 in the cellular membrane of astrocytes. These findings suggested that the effects of haloperidol on the σ1R induced GM1 accumulation in the autophagosomes of astrocytes through activating the ERK pathway and a decrease in GM1 expression on the cell surface.
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Affiliation(s)
- Rika Kasahara
- Laboratory of Neurochemistry, Department of Pharmacy, College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Naoki Yamamoto
- Laboratory of Neurochemistry, Department of Pharmacy, College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan; Faculty of Pharmaceutical Sciences, Hokuriku University, Kanazawa, Ishikawa 920-1181, Japan.
| | - Kenji Suzuki
- Laboratory of Molecular Medicinal Science, Department of Pharmacy, College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Kazuya Sobue
- Department of Anesthesiology and Medical Crisis Management, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467-8622, Japan
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18
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Heiss K, Vanella L, Murabito P, Prezzavento O, Marrazzo A, Castruccio Castracani C, Barbagallo I, Zappalà A, Arena E, Astuto M, Giarratano A, Li Volti G. (+)-Pentazocine reduces oxidative stress and apoptosis in microglia following hypoxia/reoxygenation injury. Neurosci Lett 2016; 626:142-8. [PMID: 27208832 DOI: 10.1016/j.neulet.2016.05.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 05/04/2016] [Accepted: 05/12/2016] [Indexed: 11/18/2022]
Abstract
BACKGROUND Sigma-1 receptors (σ1R) are highly expressed in neurons as well as microglia and have been shown to modulate the inflammatory response in the central nervous system and thus may serve as possible target for neuroprotective strategies. The aim of the present study was to test the effect of (+)-pentazocine, a putative σ 1R agonist, in an in vitro model of microglia activation. METHODS Microglia (BV2 cells) was exposed (3h) to 1% oxygen and reoxygenation was allowed for 24h. Cells were treated with different concentrations (1, 10, 25 and 50μM) of (+)-pentazocine in the presence or absence of NE-100 (1μM), a well established σ1R antagonist. Cell viability and apoptosis were measured by cytofluorimetric analysis, whereas oxidative stress was evaluated by reduced glutathione (GSH) content and mitochondrial potential analysis. RESULTS Our results showed that (+)-pentazocine was able to increase cell viability and restore mitochondrial potential at all concentrations whereas only 1 and 10μM were able to reduce significantly apoptotic cell death, to restore reduced glutathione intracellular content and prevent ERK1/2 phosphorylation. All these effects were abolished by concomitant treatment with NE-100. CONCLUSIONS (+)-pentazocine exhibits significant dose dependent protective effects in our in vitro model of microglial activation thus suggesting that σ1R may represent a possible target for neuroprotection.
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Affiliation(s)
- Kathrin Heiss
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 64, 95100 Catania, Italy
| | - Luca Vanella
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Paolo Murabito
- Azienda Ospedaliera Universitaria Policlinico "G. Rodolico", University of Catania, Via S. Sofia 78, 95125 Catania, Italy
| | - Orazio Prezzavento
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Agostino Marrazzo
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Carlo Castruccio Castracani
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 64, 95100 Catania, Italy
| | - Ignazio Barbagallo
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Agata Zappalà
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 64, 95100 Catania, Italy
| | - Emanuela Arena
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Marinella Astuto
- Azienda Ospedaliera Universitaria Policlinico "G. Rodolico", University of Catania, Via S. Sofia 78, 95125 Catania, Italy
| | - Antonino Giarratano
- Department of Biopathology and Medical Biotechnologies (DIBIMED), Section of Anaesthesia, Analgesia, Intensive Care and Emergency, Paolo Giaccone University Hospital, University of Palermo, Via Del Vespro 38, 90100, Palermo, Italy
| | - Giovanni Li Volti
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia 64, 95100 Catania, Italy; Euro-Mediterranean Institute of Science and Technology, Via Michele Miraglia, 20, 90100 Palermo, Italy.
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Arena E, Cacciatore I, Cerasa LS, Turkez H, Pittalà V, Pasquinucci L, Marrazzo A, Parenti C, Di Stefano A, Prezzavento O. New bifunctional antioxidant/σ1 agonist ligands: Preliminary chemico-physical and biological evaluation. Bioorg Med Chem 2016; 24:3149-56. [PMID: 27262426 DOI: 10.1016/j.bmc.2016.05.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 05/19/2016] [Accepted: 05/20/2016] [Indexed: 01/13/2023]
Abstract
We previously reported bifunctional sigma-1 (σ1) ligands endowed with antioxidant activity (1 and 2). In the present paper, pure enantiomers (R)-1 and (R)-2 along with the corresponding p-methoxy (6, 11), p-fluoro derivatives (7, 12) were synthesized. σ1 and σ2 affinities, antioxidant properties, and chemico-physical profiles were evaluated. Para derivatives, while maintaining strong σ1 affinity, displayed improved σ1 selectivity compared to the parent compounds 1 and 2. In vivo evaluation of compounds 1, 2, (R)-1, 7, and 12 showed σ1 agonist pharmacological profile. Chemico-physical studies revealed that amides 2, 11 and 12 were more stable than corresponding esters 1, 6 and 7 under our experimental conditions. Antioxidant properties were exhibited by fluoro derivatives 7 and 12 being able to increase total antioxidant capacity (TAC). Our results underline that p-substituents have an important role on σ1 selectivity, TAC, chemical and enzymatic stabilities. In particular, our data suggest that new very selective compounds 7 and 12 could be promising tools to investigate the disorders in which σ1 receptor dysfunction and oxidative stress are contemporarily involved.
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Affiliation(s)
- Emanuela Arena
- Department of Drug Sciences, Medicinal Chemistry Section, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Ivana Cacciatore
- Department of Pharmacy, University G. d'Annunzio, Via dei Vestini 31, 66100 Chieti, Italy
| | - Laura S Cerasa
- Department of Pharmacy, University G. d'Annunzio, Via dei Vestini 31, 66100 Chieti, Italy
| | - Hasan Turkez
- Department of Pharmacy, University G. d'Annunzio, Via dei Vestini 31, 66100 Chieti, Italy; Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
| | - Valeria Pittalà
- Department of Drug Sciences, Medicinal Chemistry Section, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Lorella Pasquinucci
- Department of Drug Sciences, Medicinal Chemistry Section, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Agostino Marrazzo
- Department of Drug Sciences, Medicinal Chemistry Section, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Carmela Parenti
- Department of Drug Sciences, Pharmacology Section, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Antonio Di Stefano
- Department of Pharmacy, University G. d'Annunzio, Via dei Vestini 31, 66100 Chieti, Italy
| | - Orazio Prezzavento
- Department of Drug Sciences, Medicinal Chemistry Section, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.
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20
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Su TC, Lin SH, Lee PT, Yeh SH, Hsieh TH, Chou SY, Su TP, Hung JJ, Chang WC, Lee YC, Chuang JY. The sigma-1 receptor-zinc finger protein 179 pathway protects against hydrogen peroxide-induced cell injury. Neuropharmacology 2016; 105:1-9. [PMID: 26792191 PMCID: PMC5520630 DOI: 10.1016/j.neuropharm.2016.01.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 12/14/2015] [Accepted: 01/08/2016] [Indexed: 11/25/2022]
Abstract
The accumulation of reactive oxygen species (ROS) have implicated the pathogenesis of several human diseases including neurodegenerative disorders, stroke, and traumatic brain injury, hence protecting neurons against ROS is very important. In this study, we focused on sigma-1 receptor (Sig-1R), a chaperone at endoplasmic reticulum, and investigated its protective functions. Using hydrogen peroxide (H2O2)-induced ROS accumulation model, we verified that apoptosis-signaling pathways were elicited by H2O2 treatment. However, the Sig-1R agonists, dehydroepiandrosterone (DHEA) and DHEA sulfate (DHEAS), reduced the activation of apoptotic pathways significantly. By performing protein-protein interaction assays and shRNA knockdown of Sig-1R, we identified the brain Zinc finger protein 179 (Znf179) as a downstream target of Sig-1R regulation. The neuroprotective effect of Znf179 overexpression was similar to that of DHEAS treatment, and likely mediated by affecting the levels of antioxidant enzymes. We also quantified the levels of peroxiredoxin 3 (Prx3) and superoxide dismutase 2 (SOD2) in the hippocampi of wild-type and Znf179 knockout mice, and found both enzymes to be reduced in the knockout versus the wild-type mice. In summary, these results reveal that Znf179 plays a novel role in neuroprotection, and Sig-1R agonists may be therapeutic candidates to prevent ROS-induced damage in neurodegenerative and neurotraumatic diseases.
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Affiliation(s)
- Tzu-Chieh Su
- Graduate Institute of Medical Science, Taipei Medical University, Taiwan
| | - Shu-Hui Lin
- Graduate Institute of Medical Science, Taipei Medical University, Taiwan; Graduate Institute of Neural Regenerative Medicine, Taipei Medical University, Taiwan
| | - Pin-Tse Lee
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Taiwan; Cellular Pathobiology Section, Intramural Research Program, National Institute on Drug Abuse, USA
| | - Shiu-Hwa Yeh
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Taiwan
| | - Tsung-Hsun Hsieh
- Graduate Institute of Neural Regenerative Medicine, Taipei Medical University, Taiwan
| | - Szu-Yi Chou
- Graduate Institute of Neural Regenerative Medicine, Taipei Medical University, Taiwan
| | - Tsung-Ping Su
- Cellular Pathobiology Section, Intramural Research Program, National Institute on Drug Abuse, USA
| | - Jan-Jong Hung
- Institute of Bioinformatics and Biosignal Transduction, National Cheng Kung University, Taiwan
| | - Wen-Chang Chang
- Graduate Institute of Medical Science, Taipei Medical University, Taiwan; Center for Neurotrauma and Neuroregeneration, Taipei Medical University, Taiwan
| | - Yi-Chao Lee
- Graduate Institute of Neural Regenerative Medicine, Taipei Medical University, Taiwan; Center for Neurotrauma and Neuroregeneration, Taipei Medical University, Taiwan.
| | - Jian-Ying Chuang
- Graduate Institute of Neural Regenerative Medicine, Taipei Medical University, Taiwan; Center for Neurotrauma and Neuroregeneration, Taipei Medical University, Taiwan.
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21
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Rajagopal S, Deb I, Poddar R, Paul S. Aging is associated with dimerization and inactivation of the brain-enriched tyrosine phosphatase STEP. Neurobiol Aging 2016; 41:25-38. [PMID: 27103516 DOI: 10.1016/j.neurobiolaging.2016.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 12/21/2015] [Accepted: 02/04/2016] [Indexed: 10/22/2022]
Abstract
The STriatal-Enriched tyrosine Phosphatase (STEP) is involved in the etiology of several age-associated neurologic disorders linked to oxidative stress and is also known to play a role in neuroprotection by modulating glutamatergic transmission. However, the possible effect of aging on STEP level and activity in the brain is still unclear. In this study, using young (1 month), adult (4 months), and aged (18 months) rats, we show that aging is associated with increase in dimerization and loss of activity of STEP. Increased dimerization of STEP is primarily observed in the cortex and hippocampus and is associated with depletion of both reduced and total glutathione levels, suggesting an increase in oxidative stress. Consistent with this interpretation, studies in cell culture models of glutathione depletion and oxidative stress also demonstrate formation of dimers and higher order oligomers of STEP that involve intermolecular disulfide bond formation between multiple cysteine residues. Conversely, administration of N-acetyl cysteine, a major antioxidant that enhances glutathione biosynthesis, attenuates STEP dimerization both in the cortex and hippocampus. The findings indicate that loss of this intrinsic protective response pathway with age-dependent increase in oxidative stress may be a contributing factor for the susceptibility of the brain to age-associated neurologic disorders.
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Affiliation(s)
| | - Ishani Deb
- Department of Neurology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Ranjana Poddar
- Department of Neurology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Surojit Paul
- Department of Neurology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA; Department of Neurosciences, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.
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22
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Zhao J, Mysona BA, Qureshi A, Kim L, Fields T, Gonsalvez GB, Smith SB, Bollinger KE. (+)-Pentazocine Reduces NMDA-Induced Murine Retinal Ganglion Cell Death Through a σR1-Dependent Mechanism. Invest Ophthalmol Vis Sci 2016; 57:453-61. [PMID: 26868747 PMCID: PMC4758298 DOI: 10.1167/iovs.15-18565] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 01/01/2016] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To evaluate, in vivo, the effects of the sigma-1 receptor (σR1) agonist, (+)-pentazocine, on N-methyl-D-aspartate (NMDA)-mediated retinal excitotoxicity. METHODS Intravitreal NMDA injections were performed in C57BL/6J mice (wild type [WT]) and σR1-/- (σR1 knockout [KO]) mice. Fellow eyes were injected with phosphate-buffered saline (PBS). An experimental cohort of WT and σR1 KO mice was administered (+)-pentazocine by intraperitoneal injection, and untreated animals served as controls. Retinas derived from mice were flat-mounted and labeled for retinal ganglion cells (RGCs). The number of RGCs was compared between NMDA and PBS-injected eyes for all groups. Apoptosis was assessed using TUNEL assay. Levels of extracellular-signal-regulated kinases (ERK1/2) were analyzed by Western blot. RESULTS N-methyl-D-aspartate induced a significant increase in TUNEL-positive nuclei and a dose-dependent loss of RGCs. Mice deficient in σR1 showed greater RGC loss (≈80%) than WT animals (≈50%). (+)-Pentazocine treatment promoted neuronal survival, and this effect was prevented by deletion of σR1. (+)-Pentazocine treatment resulted in enhanced activation of ERK at the 6-hour time point following NMDA injection. The (+)-pentazocine-induced ERK activation was diminished in σR1 KO mice. CONCLUSIONS Targeting σR1 activation prevented RGC death while enhancing activation of the mitogen-activated protein kinase (MAPK), ERK1/2. Sigma-1 receptor is a promising therapeutic target for retinal neurodegenerative diseases.
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Affiliation(s)
- Jing Zhao
- James and Jean Culver Vision Discovery Institute Augusta, Georgia, United States
- Department of Ophthalmology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Barbara A. Mysona
- James and Jean Culver Vision Discovery Institute Augusta, Georgia, United States
- Department of Ophthalmology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Azam Qureshi
- James and Jean Culver Vision Discovery Institute Augusta, Georgia, United States
- Department of Ophthalmology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Lily Kim
- James and Jean Culver Vision Discovery Institute Augusta, Georgia, United States
- Department of Ophthalmology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Taylor Fields
- James and Jean Culver Vision Discovery Institute Augusta, Georgia, United States
- Department of Ophthalmology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Graydon B. Gonsalvez
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Sylvia B. Smith
- James and Jean Culver Vision Discovery Institute Augusta, Georgia, United States
- Department of Ophthalmology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Kathryn E. Bollinger
- James and Jean Culver Vision Discovery Institute Augusta, Georgia, United States
- Department of Ophthalmology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
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23
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Chu UB, Ruoho AE. Biochemical Pharmacology of the Sigma-1 Receptor. Mol Pharmacol 2016; 89:142-53. [PMID: 26560551 DOI: 10.1124/mol.115.101170] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 11/06/2015] [Indexed: 12/19/2022] Open
Abstract
The sigma-1 receptor (S1R) is a 223 amino acid two transmembrane (TM) pass protein. It is a non-ATP-binding nonglycosylated ligand-regulated molecular chaperone of unknown three-dimensional structure. The S1R is resident to eukaryotic mitochondrial-associated endoplasmic reticulum and plasma membranes with broad functions that regulate cellular calcium homeostasis and reduce oxidative stress. Several multitasking functions of the S1R are underwritten by chaperone-mediated direct (and indirect) interactions with ion channels, G-protein coupled receptors and cell-signaling molecules involved in the regulation of cell growth. The S1R is a promising drug target for the treatment of several neurodegenerative diseases related to cellular stress. In vitro and in vivo functional and molecular characteristics of the S1R and its interactions with endogenous and synthetic small molecules have been discovered by the use of pharmacologic, biochemical, biophysical, and molecular biology approaches. The S1R exists in monomer, dimer, tetramer, hexamer/octamer, and higher oligomeric forms that may be important determinants in defining the pharmacology and mechanism(s) of action of the S1R. A canonical GXXXG in putative TM2 is important for S1R oligomerization. The ligand-binding regions of S1R have been identified and include portions of TM2 and the TM proximal regions of the C terminus. Some client protein chaperone functions and interactions with the cochaperone 78-kDa glucose-regulated protein (binding immunoglobulin protein) involve the C terminus. Based on its biochemical features and mechanisms of chaperone action the possibility that the S1R is a member of the small heat shock protein family is discussed.
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Affiliation(s)
- Uyen B Chu
- Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Arnold E Ruoho
- Department of Neuroscience, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
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24
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Tomohisa M, Junpei O, Aki M, Masato H, Mika F, Kazumi Y, Teruo H, Tsutomu S. Possible involvement of the Sigma-1 receptor chaperone in chemotherapeutic-induced neuropathic pain. Synapse 2015; 69:526-32. [PMID: 26234785 DOI: 10.1002/syn.21844] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Revised: 05/22/2015] [Accepted: 06/24/2015] [Indexed: 12/28/2022]
Abstract
Previous studies have shown that ligands of the sigma-1 receptor chaperone (Sig-1R) regulate pain-related behaviors. Clinical use of chemotherapeutics is often compromised due to their adverse side effects, particularly those related to neuropathy. Previous studies have shown that repeated administration of oxaliplatin and paclitaxel produces neuropathy in rodents. Therefore, the aim of the present study was to clarify the involvement of the Sig-1R in chemotherapeutic-induced neuropathy by examining the effects of oxaliplatin and paclitaxel on the Sig-1R levels in the spinal cord, and by examining the effects of Sig-1R agonist and antagonist on oxaliplatin- and paclitaxel-induced neuropathy in rats. Chemotherapeutic-induced neuropathic pain was accompanied by a significant reduction of the Sig-1R level in the spinal cord. Furthermore, the administration of paclitaxel to CHO cells that stably overexpressed Sig-1Rs induced the clustering of Sig-1Rs. We also found that the Sig-1R agonist SA4503 potently inhibited the neuropathy induced by oxaliplatin- and paclitaxel, whereas this action was abolished by the Sig-1R antagonist NE-100. These results suggest that the reduction of Sig-1R activity is involved in chemotherapeutic-induced neuropathy, and the Sig-1R agonist SA4503 could serve as a potential candidate for the treatment of chemotherapeutic-induced neuropathy.
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Affiliation(s)
- Mori Tomohisa
- Department of Toxicology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Ohya Junpei
- Department of Toxicology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Masumoto Aki
- Department of Toxicology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Harumiya Masato
- Department of Toxicology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Fukase Mika
- Department of Toxicology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Yoshizawa Kazumi
- Department of Toxicology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | | | - Suzuki Tsutomu
- Department of Toxicology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
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25
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Abstract
This review compares the biological and physiological function of Sigma receptors [σRs] and their potential therapeutic roles. Sigma receptors are widespread in the central nervous system and across multiple peripheral tissues. σRs consist of sigma receptor one (σ1R) and sigma receptor two (σ2R) and are expressed in numerous regions of the brain. The sigma receptor was originally proposed as a subtype of opioid receptors and was suggested to contribute to the delusions and psychoses induced by benzomorphans such as SKF-10047 and pentazocine. Later studies confirmed that σRs are non-opioid receptors (not an µ opioid receptor) and play a more diverse role in intracellular signaling, apoptosis and metabolic regulation. σ1Rs are intracellular receptors acting as chaperone proteins that modulate Ca2+ signaling through the IP3 receptor. They dynamically translocate inside cells, hence are transmembrane proteins. The σ1R receptor, at the mitochondrial-associated endoplasmic reticulum membrane, is responsible for mitochondrial metabolic regulation and promotes mitochondrial energy depletion and apoptosis. Studies have demonstrated that they play a role as a modulator of ion channels (K+ channels; N-methyl-d-aspartate receptors [NMDAR]; inositol 1,3,5 triphosphate receptors) and regulate lipid transport and metabolism, neuritogenesis, cellular differentiation and myelination in the brain. σ1R modulation of Ca2+ release, modulation of cardiac myocyte contractility and may have links to G-proteins. It has been proposed that σ1Rs are intracellular signal transduction amplifiers. This review of the literature examines the mechanism of action of the σRs, their interaction with neurotransmitters, pharmacology, location and adverse effects mediated through them.
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Affiliation(s)
- Colin G Rousseaux
- a Department of Pathology and Laboratory Medicine , University of Ottawa , Ottawa , ON , Canada and
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26
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Hayashi T. Conversion of psychological stress into cellular stress response: roles of the sigma-1 receptor in the process. Psychiatry Clin Neurosci 2015; 69:179-91. [PMID: 25495202 DOI: 10.1111/pcn.12262] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/08/2014] [Indexed: 12/21/2022]
Abstract
Psychiatrists empirically recognize that excessive or chronic psychological stress can result in long-lasting impairments of brain functions that partly involve neuronal cell damage. Recent studies begin to elucidate the molecular pathways activated/inhibited by psychological stress. Activation of the hypothalamic-pituitary-adrenal axis under psychological stress causes inflammatory oxidative stresses in the brain, in part due to elevation of cytokines. Psychological stress or neuropathological conditions (e.g., accumulation of β-amyloids) trigger 'cellular stress responses', which promote upregulation of molecular chaperones to protect macromolecules from degradation. The unfolded protein response, the endoplasmic reticulum (ER)-specific cellular stress response, has been recently implicated in the pathophysiology of neuropsychiatric disorders and the pharmacology of certain clinically used drugs. The sigma-1 receptor is an ER protein whose ligands are shown to exert antidepressant-like and neuroprotective actions. Recent studies found that the sigma-1 receptor is a novel ligand-operated ER chaperone that regulates bioenergetics, free radical generation, oxidative stress, unfolded protein response and cytokine signaling. The sigma-1 receptor also regulates morphogenesis of neuronal cells, such as neurite outgrowth, synaptogenesis, and myelination, which can be perturbed by cellular stress. The sigma-1 receptor may thus contribute to a cellular defense system that protects nervous systems against chronic psychological stress. Findings from sigma receptor research imply that not only cell surface monoamine effectors but also intracellular molecules, especially those at the ER, may provide novel therapeutic targets for future drug developments.
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27
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Yamashita D, Sun GW, Cui Y, Mita S, Otsuki N, Kanzaki S, Nibu KI, Ogawa K, Matsunaga T. Neuroprotective effects of cutamesine, a ligand of the sigma-1 receptor chaperone, against noise-induced hearing loss. J Neurosci Res 2015; 93:788-95. [PMID: 25612541 DOI: 10.1002/jnr.23543] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 10/28/2014] [Accepted: 11/21/2014] [Indexed: 11/10/2022]
Abstract
The sigma-1 receptor, which is expressed throughout the brain, provides physiological benefits that include higher brain function. The sigma-1 receptor functions as a chaperone in the endoplasmic reticulum and may control cell death and regeneration within the central nervous system. Cutamesine (1-(3,4-dimethoxyphenethyl)-4-(3-phenylpropyl) piperazine dihydrochloride) is a ligand selective for this receptor and may mediate neuroprotective effects in the context of neurodegenerative disease. We therefore assessed whether cutamesine protects the inner ear from noise-induced or aging-associated hearing loss. Immunohistochemistry and Western blotting revealed that the sigma-1 receptor is present in adult cochlea. We treated mice with 0, 3, or 30 mg/kg cutamesine from 10 days before noise exposure until the end of the study. All subjects were exposed to a 120-dB, 4-kHz octave-band noise for 2 hr. We assessed auditory thresholds by measuring the auditory-evoked brainstem responses at 4, 8, and 16 kHz, prior to and 1 week, 1 month, or 3 months following noise exposure. For the aging study, measurements were made before treatment was initiated and after 3 or 9 months of cutamesine treatment. Damage to fibrocytes within the cochlear spiral limbus was assessed by quantitative histology. Cutamesine significantly reduced threshold shifts and cell death within the spiral limbus in response to intense noise. These effects were not dose or time dependent. Conversely, cutamesine did not prevent aging-associated hearing loss. These results suggest that cutamesine reduces noise-induced hearing loss and cochlear damage during the acute phase that follows exposure to an intense noise.
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Affiliation(s)
- Daisuke Yamashita
- Department of Otolaryngology, School of Medicine, Kobe University, Kobe, Japan; Laboratory of Auditory Disorders, Division of Hearing and Balance Research, National Institute of Sensory Organs, National Tokyo Medical Center, Tokyo, Japan; Department of Otolaryngology, School of Medicine, Keio University, Tokyo, Japan
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28
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Lee YJ, Choi SY, Yang JH. NMDA receptor-mediated ERK 1/2 pathway is involved in PFHxS-induced apoptosis of PC12 cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 491-492:227-34. [PMID: 24534200 DOI: 10.1016/j.scitotenv.2014.01.114] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Revised: 01/29/2014] [Accepted: 01/29/2014] [Indexed: 05/15/2023]
Abstract
Perfluorohexanesulfonate (PFHxS) is one of the major perfluoroalkyl compounds (PFCs) found in human blood and its possible neurotoxicity has been suggested. However, the neuronal responses to PFHxS are not much known. Many studies have demonstrated that the early exposure to environmental chemicals increases the risk of neurodegenerative diseases such as Parkinson's disease in later life. In this study, the effects of PFHxS on the neuronal cell death and the underlying mechanisms were examined using PC12 cells as a model of dopaminergic neuron. The treatment with PFHxS reduced cell viability in a dose-dependent manner. PFHxS increased cell apoptosis which was measured by caspase-3 activity and TUNEL staining. MK801, a NMDA receptor antagonist reduced PFHxS-induced apoptosis. PFHxS increased the activations of ERK1/2, JNK and p38 MAPK with different temporal activations. The treatment with PD98059, an ERK inhibitor, significantly reduced apoptosis, whereas SB203580, a p38 MAPK inhibitor, had no effect. JNK inhibition by SP600125 significantly increased apoptosis. PFHxS exposure also increased ROS formation, which was completely blocked by antioxidants, Trolox or N-acetylcysteine (NAC). However, neither Trolox nor NAC reduced PFHxS-increased apoptosis, suggesting that ROS may not be a critical mediator for PFHxS-induced apoptosis of cells. Moreover, ERK activation induced by PFHxS was blocked by MK801 but not antioxidants. Taken together, these results have demonstrated that PFHxS induces the apoptosis of dopaminergic neuronal cells, where NMDA receptor-mediated ERK pathway plays a pro-apoptotic role and JNK plays an anti-apoptotic role. Our results may contribute to understanding cellular mechanisms for PFHxS-induced neurotoxicity.
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Affiliation(s)
- Youn Ju Lee
- Department of Pharmacology/Toxicology, School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea.
| | - So-Young Choi
- Department of Pharmacology/Toxicology, School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea
| | - Jae H Yang
- Department of Pharmacology/Toxicology, School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea
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29
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Mancuso R, del Valle J, Morell M, Pallás M, Osta R, Navarro X. Lack of synergistic effect of resveratrol and sigma-1 receptor agonist (PRE-084) in SOD1G⁹³A ALS mice: overlapping effects or limited therapeutic opportunity? Orphanet J Rare Dis 2014; 9:78. [PMID: 24885036 PMCID: PMC4035830 DOI: 10.1186/1750-1172-9-78] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 05/19/2014] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Amyotrophic lateral sclerosis (ALS) is an adult onset neurodegenerative disease characterized by the loss of motoneurons (MNs) in the spinal cord, brainstem and motor cortex, causing progressive paralysis and death. Nowadays, there is no effective therapy and most patients die 2-5 years after diagnosis. Sigma-1R is a transmembrane protein highly expressed in the CNS and specially enriched in MNs. Mutations on the Sigma-1R leading to frontotemporal lobar degeneration-ALS were recently described in human patients. We previously reported the therapeutic role of the selective sigma-1R agonist 2-(4-morpholi-nethyl)1-phenylcyclohexanecarboxylate (PRE-084) in SOD1G93A ALS mice, that promoted spinal MN preservation and extended animal survival by controlling NMDA receptor calcium influx. Resveratrol (RSV, trans-3,4',5-trihydroxystilbene) is a natural polyphenol with promising neuroprotective effects. We recently found that RSV administration to SOD1G93A mice preserves spinal MN function and increases mice survival. These beneficial effects were associated to activation of Sirtuin 1 (Sirt1) and AMP-activated protein kinase (AMPK) pathways, leading to the modulation of autophagy and an increase of mitochondrial biogenesis. The main goal of this work was to assess the effect of combined RSV and PRE-084 administration in SOD1G93A ALS mice. METHODS We determined the locomotor performance of the animals by rotarod test and evaluated spinal motoneuron function using electrophysiological tests. RESULTS RSV plus PRE-084 treatment from 8 weeks of age significantly improved locomotor performance and spinal MN function, accompanied by a significant reduction of MN degeneration and an extension of mice lifespan. In agreement with our previous findings, there was an induction of PKC-specific phosphorylation of the NMDA-NR1 subunit and an increased expression and activation of Sirt1 and AMPK in the ventral spinal cord of treated SOD1G93A animals. CONCLUSIONS Although combined PRE and RSV treatment significantly ameliorated SOD1G93A mice, it did not show a synergistic effect compared to RSV-only and PRE-084-only treated groups.
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Affiliation(s)
- Renzo Mancuso
- Institute of Neurosciences and Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain
| | - Jaume del Valle
- Institute of Neurosciences and Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain
| | - Marta Morell
- Institute of Neurosciences and Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain
| | - Mercé Pallás
- Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona, and CIBERNED, Barcelona, Spain
| | - Rosario Osta
- Laboratory of Genetic Biochemistry (LAGENBIO-I3A), Aragon Institute of Health Sciences, Universidad de Zaragoza, Zaragoza, Spain
| | - Xavier Navarro
- Institute of Neurosciences and Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain
- Unitat de Fisiologia Mèdica, Facultat de Medicina, Universitat Autònoma de Barcelona, Bellaterra E-08193, Spain
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Zhao J, Ha Y, Liou GI, Gonsalvez GB, Smith SB, Bollinger KE. Sigma receptor ligand, (+)-pentazocine, suppresses inflammatory responses of retinal microglia. Invest Ophthalmol Vis Sci 2014; 55:3375-84. [PMID: 24812552 PMCID: PMC4042630 DOI: 10.1167/iovs.13-12823] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 04/29/2014] [Indexed: 02/05/2023] Open
Abstract
PURPOSE To evaluate the effects of the σ 1 receptor (σR1) agonist, (+)-pentazocine, on lipopolysaccharide (LPS)-induced inflammatory changes in retinal microglia cells. METHODS Retinal microglia cells were isolated from Sprague-Dawley rat pups. Cells were treated with LPS with or without (+)-pentazocine and with or without the σR1 antagonist BD1063. Morphologic changes were assayed. Cell viability was assessed by using MTT assay. Supernatant levels of tumor necrosis factor α (TNF-α), interleukin 10, (IL-10), monocyte chemoattractant protein-1 (MCP-1), and nitric oxide (NO) were determined. Reactive oxygen species (ROS) formation was assayed, and levels of mitogen-activated protein kinases (MAPKs) were analyzed by using Western blot. RESULTS The σR1 protein was expressed in retinal microglia. Incubation with LPS and/or (+)-pentazocine did not alter cell viability or σR1 protein levels. Incubation with LPS for 24 hours induced a marked change in microglial morphology and a significant increase in secreted levels of TNF-α, IL-10, MCP-1, and NO. Pretreatment with (+)-pentazocine inhibited the LPS-induced morphologic changes. Release of TNF-α, IL-10, MCP-1, and NO was reduced with (+)-pentazocine. Intracellular ROS formation was suppressed with (+)-pentazocine. Phosphorylation of extracellular signal-regulated kinase (ERK) and c-Jun N-terminal kinase (JNK) was reduced in the presence of (+)-pentazocine. The σR1 antagonist BD1063 blocked the (+)-pentazocine-mediated inhibition of LPS-induced morphologic changes. In addition, BD1063 treatment blocked (+)-pentazocine-mediated suppression of LPS-induced TNF-α, IL-10, MCP-1, NO, and intracellular ROS release. CONCLUSIONS Treatment with (+)-pentazocine suppressed inflammatory responses of retinal microglia and inhibited LPS-induced activation of ERK/JNK MAPK. In neurodegenerative disease, (+)-pentazocine may exert neuroprotective effects through manipulation of microglia.
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Affiliation(s)
- Jing Zhao
- James and Jean Culver Vision Discovery Institute, Georgia Regents University, Augusta, Georgia, United States
| | - Yonju Ha
- James and Jean Culver Vision Discovery Institute, Georgia Regents University, Augusta, Georgia, United States
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Gregory I. Liou
- James and Jean Culver Vision Discovery Institute, Georgia Regents University, Augusta, Georgia, United States
- Department of Ophthalmology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Graydon B. Gonsalvez
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Georgia Regents University, Augusta, Georgia, United States
| | - Sylvia B. Smith
- James and Jean Culver Vision Discovery Institute, Georgia Regents University, Augusta, Georgia, United States
| | - Kathryn E. Bollinger
- James and Jean Culver Vision Discovery Institute, Georgia Regents University, Augusta, Georgia, United States
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Robson MJ, Turner RC, Naser ZJ, McCurdy CR, O'Callaghan JP, Huber JD, Matsumoto RR. SN79, a sigma receptor antagonist, attenuates methamphetamine-induced astrogliosis through a blockade of OSMR/gp130 signaling and STAT3 phosphorylation. Exp Neurol 2014; 254:180-9. [PMID: 24508558 DOI: 10.1016/j.expneurol.2014.01.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Revised: 01/22/2014] [Accepted: 01/27/2014] [Indexed: 12/11/2022]
Abstract
Methamphetamine (METH) exposure results in dopaminergic neurotoxicity in striatal regions of the brain, an effect that has been linked to an increased risk of Parkinson's disease. Various aspects of neuroinflammation, including astrogliosis, are believed to be contributory factors in METH neurotoxicity. METH interacts with sigma receptors at physiologically relevant concentrations and treatment with sigma receptor antagonists has been shown to mitigate METH-induced neurotoxicity in rodent models. Whether these compounds alter the responses of glial cells within the central nervous system to METH however has yet to be determined. Therefore, the purpose of the current study was to determine whether the sigma receptor antagonist, SN79, mitigates METH-induced striatal reactive astrogliosis. Male, Swiss Webster mice treated with a neurotoxic regimen of METH exhibited time-dependent increases in striatal gfap mRNA and concomitant increases in GFAP protein, indicative of astrogliosis. This is the first report that similar to other neurotoxicants that induce astrogliosis through the activation of JAK2/STAT3 signaling by stimulating gp-130-linked cytokine signaling resulting from neuroinflammation, METH treatment also increases astrocytic oncostatin m receptor (OSMR) expression and the phosphorylation of STAT3 (Tyr-705) in vivo. Pretreatment with SN79 blocked METH-induced increases in OSMR, STAT3 phosphorylation and astrocyte activation within the striatum. Additionally, METH treatment resulted in striatal cellular degeneration as measured by Fluoro-Jade B, an effect that was mitigated by SN79. The current study provides evidence that sigma receptor antagonists attenuate METH-induced astrocyte activation through a pathway believed to be shared by various neurotoxicants.
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Affiliation(s)
- Matthew J Robson
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, 1 Medical Center Dr., West Virginia University Health Sciences Center, Morgantown, WV 26506, USA; Department of Pharmacology, School of Medicine, Vanderbilt University, 1161 21st Ave S., Nashville, TN 37232, USA
| | - Ryan C Turner
- Department of Neurosurgery, School of Medicine, West Virginia University, 1 Medical Center Dr., West Virginia University Health Sciences Center, Morgantown, WV 26506, USA; Center for Neuroscience, School of Medicine, West Virginia University, 1 Medical Center Dr., West Virginia University Health Sciences Center, Morgantown, WV 26506, USA
| | - Zachary J Naser
- Department of Neurosurgery, School of Medicine, West Virginia University, 1 Medical Center Dr., West Virginia University Health Sciences Center, Morgantown, WV 26506, USA
| | - Christopher R McCurdy
- Department of Medicinal Chemistry, School of Pharmacy, University of Mississippi, P.O. Box 1848, University, MS 38677-1848, USA; Department of Pharmacology, School of Pharmacy, University of Mississippi, P.O. Box 1848, University, MS 38677-1848, USA
| | - James P O'Callaghan
- Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute of Occupational Safety and Health, 1095 Willowdale Rd., Morgantown, WV 26505, USA
| | - Jason D Huber
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, 1 Medical Center Dr., West Virginia University Health Sciences Center, Morgantown, WV 26506, USA; Center for Neuroscience, School of Medicine, West Virginia University, 1 Medical Center Dr., West Virginia University Health Sciences Center, Morgantown, WV 26506, USA
| | - Rae R Matsumoto
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, 1 Medical Center Dr., West Virginia University Health Sciences Center, Morgantown, WV 26506, USA; Center for Neuroscience, School of Medicine, West Virginia University, 1 Medical Center Dr., West Virginia University Health Sciences Center, Morgantown, WV 26506, USA.
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Ono Y, Tanaka H, Takata M, Nagahara Y, Noda Y, Tsuruma K, Shimazawa M, Hozumi I, Hara H. SA4503, a sigma-1 receptor agonist, suppresses motor neuron damage in in vitro and in vivo amyotrophic lateral sclerosis models. Neurosci Lett 2014; 559:174-8. [PMID: 24334165 DOI: 10.1016/j.neulet.2013.12.005] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 11/07/2013] [Accepted: 12/04/2013] [Indexed: 12/17/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease. Recently, it has been reported that a mutation in the sigma-1 receptor causes juvenile ALS. Therefore, the function of the sigma-1 receptor may be important in the pathology of ALS. In the present study, we investigated the effect of SA4503, a sigma-1 receptor agonist, against in in vitro and in vivo ALS models. We first investigated whether SA4503, a sigma-1 receptor agonist, prevented superoxide dismutase 1 (SOD1(G93A))- and serum free-induced cell death of mice motor neuron cells (NSC34) in in vitro model of an ALS. At concentrations of 1-10μM, SA4503 reduced SOD1(G93A)-induced cell death in a concentration-dependent manner, and BD1047, a sigma-1 receptor antagonist, inhibited the protective effect of SA4503. Next, we investigated whether SA4503 affected the phosphorylation levels of Akt (Ser 473) and extracellular signal-regulated kinase (ERK) 1/2 and the expression of the sigma-1 receptor. SA4503 promoted the phosphorylation of Akt (Ser 473) and ERK1/2 in a time-dependent manner, but SA4503 did not affect the expression of the sigma-1 receptor. These results suggest that the protective effect of SA4503 might be involved in promoting the phosphorylation of Akt and ERK1/2. We then investigated whether SA4503 suppressed the progression of ALS in an SOD1(G93A) ALS mouse model. SA4503 did not affect the onset time of ALS. However, it significantly extended the survival time in the SOD1(G93A) mice compared with a vehicle-treated group. These findings indicate that SA4503 is effective in suppressing motor neuron degeneration and symptom progression in ALS.
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Affiliation(s)
- Yoko Ono
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Hirotaka Tanaka
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Masafumi Takata
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Yuki Nagahara
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Yasuhiro Noda
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Kazuhiro Tsuruma
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Masamitsu Shimazawa
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Isao Hozumi
- Department of Medical Therapeutics and Molecular Therapeutics, Gifu Pharmaceutical University, Gifu, Japan
| | - Hideaki Hara
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan.
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Frecska E, Szabo A, Winkelman MJ, Luna LE, McKenna DJ. A possibly sigma-1 receptor mediated role of dimethyltryptamine in tissue protection, regeneration, and immunity. J Neural Transm (Vienna) 2013; 120:1295-303. [PMID: 23619992 DOI: 10.1007/s00702-013-1024-y] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 04/01/2013] [Indexed: 01/20/2023]
Abstract
N,N-dimethyltryptamine (DMT) is classified as a naturally occurring serotonergic hallucinogen of plant origin. It has also been found in animal tissues and regarded as an endogenous trace amine transmitter. The vast majority of research on DMT has targeted its psychotropic/psychedelic properties with less focus on its effects beyond the nervous system. The recent discovery that DMT is an endogenous ligand of the sigma-1 receptor may shed light on yet undiscovered physiological mechanisms of DMT activity and reveal some of its putative biological functions. A three-step active uptake process of DMT from peripheral sources to neurons underscores a presumed physiological significance of this endogenous hallucinogen. In this paper, we overview the literature on the effects of sigma-1 receptor ligands on cellular bioenergetics, the role of serotonin, and serotoninergic analogues in immunoregulation and the data regarding gene expression of the DMT synthesizing enzyme indolethylamine-N-methyltransferase in carcinogenesis. We conclude that the function of DMT may extend central nervous activity and involve a more universal role in cellular protective mechanisms. Suggestions are offered for future directions of indole alkaloid research in the general medical field. We provide converging evidence that while DMT is a substance which produces powerful psychedelic experiences, it is better understood not as a hallucinogenic drug of abuse, but rather an agent of significant adaptive mechanisms that can also serve as a promising tool in the development of future medical therapies.
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Affiliation(s)
- Ede Frecska
- Department of Psychiatry, Medical and Health Science Center, University of Debrecen, Nagyerdei krt. 98, 4012, Debrecen, Hungary.
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Chu UB, Ramachandran S, Hajipour AR, Ruoho AE. Photoaffinity labeling of the sigma-1 receptor with N-[3-(4-nitrophenyl)propyl]-N-dodecylamine: evidence of receptor dimers. Biochemistry 2013; 52:859-68. [PMID: 23324054 PMCID: PMC3581363 DOI: 10.1021/bi301517u] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The sigma-1 receptor is a ligand-regulated endoplasmic reticulum (ER) resident chaperone involved in the maintenance of cellular homeostasis. Coupling of the sigma-1 receptor with various ER and/or plasma membrane ion channels is associated with its ability to regulate the locomotor activity and cellular proliferation produced in response to sigma-1 receptor ligands. A number of endogenous small molecules bind to the sigma-1 receptor and have been shown to regulate its activity; these include progesterone, N,N-dimethyltryptamine, d-erythro-sphingosine, and/or other endogenous lipids. We previously reported the synthesis of long chain N-alkylamine derivatives and the characterization of the structure-activity relationship between the chain length of N-alkylamine and affinities at the sigma-1 receptor. Here, we present data demonstrating the photoincorporation of one of these N-alkylamine derivatives, N-[3-(4-nitrophenyl)propyl]-N-dodecylamine (4-NPPC12), to the sigma-1 receptor. Matrix-assisted laser desorption ionization time-of-flight and tandem mass spectrometry showed that 4-NPPC12 photoinserted at histidine 154 of the derivatized population of the sigma-1 receptor. Interestingly, light-dependent photoinsertion of 4-NPPC12 resulted in an enhanced electrophoretic mobility of only 50% of the derivatized receptor molecules as assessed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The proposed binding and reactivity of 4-NPPC12 evoke a ligand binding model for the sigma-1 receptor that likely involves a receptor dimer and/or oligomer.
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Affiliation(s)
- Uyen B. Chu
- Department of Neuroscience, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53706
| | - Subramaniam Ramachandran
- Department of Neuroscience, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53706
| | - Abdol R. Hajipour
- Pharmaceutical Research Laboratory, College of Chemistry, Isfahan University of Technology, Isfahan 84156, IR Iran
| | - Arnold E. Ruoho
- Department of Neuroscience, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53706
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Poddar R, Paul S. Novel crosstalk between ERK MAPK and p38 MAPK leads to homocysteine-NMDA receptor-mediated neuronal cell death. J Neurochem 2012; 124:558-70. [PMID: 23176034 DOI: 10.1111/jnc.12102] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 11/20/2012] [Accepted: 11/21/2012] [Indexed: 11/29/2022]
Abstract
Hyperhomocysteinemia is an independent risk factor for both acute and chronic neurological disorders, but little is known about the underlying mechanisms by which elevated homocysteine can promote neuronal cell death. We recently established a role for NMDA receptor-mediated activation of extracellular signal-regulated kinase (ERK)-MAPK in homocysteine-induced neuronal cell death. In this study, we examined the involvement of the stress-induced MAPK, p38 in homocysteine-induced neuronal cell death, and further explored the relationship between the two MAPKs, ERK and p38, in triggering cell death. Homocysteine-mediated NMDA receptor stimulation and subsequent Ca(2+) influx led to a biphasic activation of p38 MAPK characterized by an initial rapid, but transient activation followed by a delayed and more prolonged response. Selective inhibition of the delayed p38 MAPK activity was sufficient to attenuate homocysteine-induced neuronal cell death. Using pharmacological and RNAi approaches, we further demonstrated that both the initial and delayed activation of p38 MAPK is downstream of, and dependent on activation of ERK MAPK. Our findings highlight a novel interplay between ERK and p38 MAPK in homocysteine-NMDA receptor-induced neuronal cell death.
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Affiliation(s)
- Ranjana Poddar
- University of New Mexico Health Sciences Center, Department of Neurology, 1, University of New Mexico, Albuquerque, NM 87131, USA.
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Mancuso R, Oliván S, Rando A, Casas C, Osta R, Navarro X. Sigma-1R agonist improves motor function and motoneuron survival in ALS mice. Neurotherapeutics 2012; 9:814-26. [PMID: 22935988 PMCID: PMC3480575 DOI: 10.1007/s13311-012-0140-y] [Citation(s) in RCA: 128] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Amyotrophic lateral sclerosis is a neurodegenerative disorder characterized by progressive weakness, muscle atrophy, and paralysis due to the loss of upper and lower motoneurons (MNs). Sigma-1 receptor (sigma-1R) activation promotes neuroprotection after ischemic and traumatic injuries to the central nervous system. We recently reported that sigma-1R agonist (PRE-084) improves the survival of MNs after root avulsion injury in rats. Moreover, a mutation of the sigma-1R leading to frontotemporal lobar degeneration/amyotrophic lateral sclerosis (ALS) was recently described in human patients. In the present study, we analyzed the potential therapeutic effect of the sigma-1R agonist (PRE-084) in the SOD1(G93A) mouse model of ALS. Mice were daily administered with PRE-084 (0.25 mg/kg) from 8 to 16 weeks of age. Functional outcome was assessed by electrophysiological tests and computerized analysis of locomotion. Histological, immunohistochemical analyses and Western blot of the spinal cord were performed. PRE-084 administration from 8 weeks of age improved the function of MNs, which was manifested by maintenance of the amplitude of muscle action potentials and locomotor behavior, and preserved neuromuscular connections and MNs in the spinal cord. Moreover, it extended survival in both female and male mice by more than 15 %. Delayed administration of PRE-084 from 12 weeks of age also significantly improved functional outcome and preservation of the MNs. There was an induction of protein kinase C-specific phosphorylation of the NR1 subunit of the N-methyl-D-aspartate (NMDA) receptor in SOD1(G93A) animals, and a reduction of the microglial reactivity compared with untreated mice. PRE-084 exerts a dual therapeutic contribution, modulating NMDA Ca(2+) influx to protect MNs, and the microglial reactivity to ameliorate the MN environment. In conclusion, sigma-1R agonists, such as PRE-084, may be promising candidates for a therapeutical strategy of ALS.
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Affiliation(s)
- Renzo Mancuso
- Group of Neuroplasticity and Regeneration, Institute of Neurosciences and Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Bellaterra, 08193 Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, 08193 Spain
| | - Sara Oliván
- Laboratory of Genetic Biochemistry (LAGENBIO-I3A), Aragon Institute of Health Sciences, Universidad de Zaragoza, Zaragoza, 50013 Spain
| | - Amaya Rando
- Laboratory of Genetic Biochemistry (LAGENBIO-I3A), Aragon Institute of Health Sciences, Universidad de Zaragoza, Zaragoza, 50013 Spain
| | - Caty Casas
- Group of Neuroplasticity and Regeneration, Institute of Neurosciences and Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Bellaterra, 08193 Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, 08193 Spain
| | - Rosario Osta
- Laboratory of Genetic Biochemistry (LAGENBIO-I3A), Aragon Institute of Health Sciences, Universidad de Zaragoza, Zaragoza, 50013 Spain
| | - Xavier Navarro
- Group of Neuroplasticity and Regeneration, Institute of Neurosciences and Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Bellaterra, 08193 Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, 08193 Spain
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Cigarette smoking accelerated brain aging and induced pre-Alzheimer-like neuropathology in rats. PLoS One 2012; 7:e36752. [PMID: 22606286 PMCID: PMC3350465 DOI: 10.1371/journal.pone.0036752] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 04/12/2012] [Indexed: 12/21/2022] Open
Abstract
Cigarette smoking has been proposed as a major risk factor for aging-related pathological changes and Alzheimer's disease (AD). To date, little is known for how smoking can predispose our brains to dementia or cognitive impairment. This study aimed to investigate the cigarette smoke-induced pathological changes in brains. Male Sprague-Dawley (SD) rats were exposed to either sham air or 4% cigarette smoke 1 hour per day for 8 weeks in a ventilated smoking chamber to mimic the situation of chronic passive smoking. We found that the levels of oxidative stress were significantly increased in the hippocampus of the smoking group. Smoking also affected the synapse through reducing the expression of pre-synaptic proteins including synaptophysin and synapsin-1, while there were no changes in the expression of postsynaptic protein PSD95. Decreased levels of acetylated-tubulin and increased levels of phosphorylated-tau at 231, 205 and 404 epitopes were also observed in the hippocampus of the smoking rats. These results suggested that axonal transport machinery might be impaired, and the stability of cytoskeleton might be affected by smoking. Moreover, smoking affected amyloid precursor protein (APP) processing by increasing the production of sAPPβ and accumulation of β–amyloid peptide in the CA3 and dentate gyrus region. In summary, our data suggested that chronic cigarette smoking could induce synaptic changes and other neuropathological alterations. These changes might serve as evidence of early phases of neurodegeneration and may explain why smoking can predispose brains to AD and dementia.
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38
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Luedtke RR, Perez E, Yang SH, Liu R, Vangveravong S, Tu Z, Mach RH, Simpkins JW. Neuroprotective effects of high affinity Σ1 receptor selective compounds. Brain Res 2012; 1441:17-26. [PMID: 22285434 PMCID: PMC4054954 DOI: 10.1016/j.brainres.2011.12.047] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 11/08/2011] [Accepted: 12/22/2011] [Indexed: 10/14/2022]
Abstract
We previously reported that the antipsychotic drug haloperidol, a multifunctional D2-like dopamine and sigma receptor subtype antagonist, has neuroprotective properties. In this study we further examined the association between neuroprotection and receptor antagonism by evaluating a panel of novel compounds with varying affinity at sigma and D2-like dopamine receptors. These compounds were evaluated using an in vitro cytotoxicity assay that utilizes a hippocampal-derived cell line, HT-22, in the presence or absence of varying concentrations (5 to 20 mM) of glutamate. While haloperidol was found to be a potent neuroprotective agent in this in vitro cell assay, the prototypic sigma 1 receptor agonist (+)-pentazocine was found not to be neuroprotective. Subsequently, the potency for the neuroprotection of HT-22 cells was evaluated for a) three SV series indoles which have nMolar affinity at D2-like receptors but varying affinity at sigma 1 receptor and b) two benzyl phenylacetamides sigma 1 receptor selective compounds which bind with low affinity at D2-like receptors but have nMolar affinity for the sigma 1 receptor. We observed that cytoprotection correlated with the affinity of the compounds for sigma 1 receptors. Based upon results from the HT-22 cell-based in vitro assay, two phenylacetamides, LS-127 and LS-137, were further evaluated in vivo using a transient middle cerebral artery occlusion (t-MCAO) model of stroke. At a dose of 100 μg/kg, both LS-127 and LS-137 attenuated infarct volume by approximately 50%. These studies provide further evidence that sigma 1 receptor selective compounds can provide neuroprotection in cytotoxic situations. These results also demonstrate that sigma 1 receptor selective benzyl phenylacetamides are candidate pharmacotherapeutic agents that could be used to minimize neuronal death after a stroke or head trauma.
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Affiliation(s)
- Robert R Luedtke
- Department of Pharmacology and Neuroscience, Institute for Aging and Alzheimer's Disease Research, University of North Texas Health Science Center at Fort Worth, Fort Worth, TX 76107, USA.
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Tsai SY, Rothman RK, Su TP. Insights into the Sigma-1 receptor chaperone's cellular functions: a microarray report. Synapse 2012; 66:42-51. [PMID: 21905129 PMCID: PMC3705961 DOI: 10.1002/syn.20984] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 08/24/2011] [Indexed: 12/16/2022]
Abstract
We previously demonstrated that Sig-1Rs are critical regulators in neuronal morphogenesis and development via the regulation of oxidative stress and mitochondrial functions. In the present study, we sought to identify pathways and genes that are affected by Sig-1R. Gene expression profiles were examined in rat hippocampal neurons that had been cultured for 18 days in vitro (DIV). The cells were transduced with AAV siRNA targeting Sig-1R on DIV 10 for 7 days, followed by gene expression analysis using a rat genome cDNA array. The gene array results indicated that Sig-1R knockdown hampered cellular functions including steroid biogenesis, protein ubiquitination, actin cytoskeleton network, and Nrf-2 mediated oxidative stress. Many of the cellular components important for actin polymerization and synapse plasticity, including F-actin capping protein and neurofilaments, were significantly changed in AAV-siSig-1R neurons. Further, cytochrome c was reduced in AAV-Sig-1R neurons whereas free-radical generating enzymes including cytochrome p450 and cytochrome b-245 were increased. The microarray results also suggest that Sig-1Rs may regulate genes that are involved in the pathogenesis of many CNS diseases including Alzheimer's disease and Parkinson's disease. These data further confirmed that Sig-1Rs play critical roles in the CNS and thus these findings may aid in future development of therapeutic treatments targeting neurodegenerative disorders.
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Affiliation(s)
- Shang-Yi Tsai
- Cellular Pathobiology Section, Integrative Neuroscience Branch, National Institute on Drug Abuse, NIH, DHHS, Baltimore, Maryland 21224, USA
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Hirata Y, Yamamoto H, Atta MSM, Mahmoud S, Oh-hashi K, Kiuchi K. Chloroquine inhibits glutamate-induced death of a neuronal cell line by reducing reactive oxygen species through sigma-1 receptor. J Neurochem 2011; 119:839-47. [PMID: 21883227 DOI: 10.1111/j.1471-4159.2011.07464.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Chloroquine, a widely used anti-malarial and anti-rheumatoid agent, has been reported to induce apoptotic and non-apoptotic cell death. Accumulating evidence now suggests that chloroquine can sensitize cancer cells to cell death and augment chemotherapy-induced apoptosis by inhibiting autophagy. However, chloroquine is reported to induce GM1 ganglioside accumulation in cultured cells at low μM concentrations and prevent damage to the blood brain barrier in mice. It remains unknown whether chloroquine has neuroprotective properties at concentrations below its reported ability to inhibit lysosomal enzymes and autophagy. In the present study, we demonstrated that chloroquine protected mouse hippocampal HT22 cells from glutamate-induced oxidative stress by attenuating production of excess reactive oxygen species. The concentration of chloroquine required to rescue HT22 cells from oxidative stress was much lower than that sufficient enough to induce cell death and inhibit autophagy. Chloroquine increased GM1 level in HT22 cells at low μM concentrations but glutamate-induced cell death occurred before GM1 accumulation, suggesting that GM1 induction is not related to the protective effect of chloroquine against glutamate-induced cell death. Interestingly, BD1047 and NE-100, sigma-1 receptor antagonists, abrogated the protective effect of chloroquine against glutamate-induced cell death and reactive oxygen species production. In addition, cutamesine (SA4503), a sigma-1 receptor agonist, prevented both glutamate-induced cell death and reactive oxygen species production. These findings indicate that chloroquine at concentrations below its ability to inhibit autophagy and induce cell death is able to rescue HT22 cells from glutamate-induced cell death by reducing excessive production of reactive oxygen species through sigma-1 receptors. These results suggest potential use of chloroquine, an established anti-malarial agent, as a neuroprotectant against oxidative stress, which occurs in a variety of neurodegenerative diseases.
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Affiliation(s)
- Yoko Hirata
- Department of Biomolecular Science, Gifu University, Gifu, Japan.
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Growth factors stimulate expression of neuronal and glial miR-132. Neurosci Lett 2011; 505:242-7. [PMID: 22027176 DOI: 10.1016/j.neulet.2011.10.025] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 09/08/2011] [Accepted: 10/12/2011] [Indexed: 12/13/2022]
Abstract
Brain-specific microRNAs (miRs) and brain-derived neurotrophic factor (BDNF) are both involved in synaptic function. We previously reported that upregulation of miR-132 is involved in BDNF-increased synaptic proteins, including glutamate receptors (NR2A, NR2B, and GluR1) in mature cortical neurons [7]. However, the potential role of other growth factors in miR-132 induction has not been clarified. Here, we examined the effect of growth factors including basic fibroblast growth factor (bFGF), insulin-like growth factor-1 (IGF-1), glial cell line-derived neurotrophic factor (GDNF), and epidermal growth factor (EGF), on expression of miR-132 and glutamate receptors in immature cortical neurons. We found that BDNF and bFGF upregulated levels of miR-132 in cortical cultures, though bFGF failed to increase glutamate receptors such as NR2A, NR2B, and GluR1. IGF-1, GDNF, and EGF did not have a positive influence on miR-132 and glutamate receptors in neuronal cultures. Furthermore, bFGF significantly upregulated miR-132 in cultured astroglial cells, while other growth factors failed to elicit such a response. It is possible that the growth factor-stimulated neuronal and glial action of miR-132 plays a critical role in brain function.
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Numakawa T, Richards M, Adachi N, Kishi S, Kunugi H, Hashido K. MicroRNA function and neurotrophin BDNF. Neurochem Int 2011; 59:551-8. [PMID: 21723895 DOI: 10.1016/j.neuint.2011.06.009] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 06/15/2011] [Accepted: 06/16/2011] [Indexed: 12/11/2022]
Abstract
MicroRNAs (miRs), endogenous small RNAs, regulate gene expression through repression of translational activity after binding to target mRNAs. miRs are involved in various cellular processes including differentiation, metabolism, and apoptosis. Furthermore, possible involvement of miRs in neuronal function have been proposed. For example, miR-132 is closely related to neuronal outgrowth while miR-134 plays a role in postsynaptic regulation, suggesting that brain-specific miRs are critical for synaptic plasticity. On the other hand, numerous studies indicate that BDNF (brain-derived neurotrophic factor), one of the neurotrophins, is essential for a variety of neuronal aspects such as cell differentiation, survival, and synaptic plasticity in the central nervous system (CNS). Interestingly, recent studies, including ours, suggest that BDNF exerts its beneficial effects on CNS neurons via up-regulation of miR-132. Here, we present a broad overview of the current knowledge concerning the association between neurotrophins and various miRs.
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Affiliation(s)
- Tadahiro Numakawa
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Tokyo 187-8502, Japan.
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Numakawa T, Matsumoto T, Numakawa Y, Richards M, Yamawaki S, Kunugi H. Protective Action of Neurotrophic Factors and Estrogen against Oxidative Stress-Mediated Neurodegeneration. J Toxicol 2011; 2011:405194. [PMID: 21776259 PMCID: PMC3135156 DOI: 10.1155/2011/405194] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 02/28/2011] [Accepted: 03/29/2011] [Indexed: 01/01/2023] Open
Abstract
Oxidative stress is involved in the pathogenesis of neurodegenerative disorders such as Alzheimer's disease, Parkinson's disease, and Huntington's disease. Low levels of reactive oxygen species (ROS) and reactive nitrogen species (RNS) are important for maintenance of neuronal function, though elevated levels lead to neuronal cell death. A complex series of events including excitotoxicity, Ca(2+) overload, and mitochondrial dysfunction contributes to oxidative stress-mediated neurodegeneration. As expected, many antioxidants like phytochemicals and vitamins are known to reduce oxidative toxicity. Additionally, growing evidence indicates that neurotrophic factors such as brain-derived neurotrophic factor (BDNF) and estrogens significantly prevent neuronal damage caused by oxidative stress. Here, we review and discuss recent studies addressing the protective mechanisms of neurotrophic factors and estrogen within this system.
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Affiliation(s)
- Tadahiro Numakawa
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan
- Core Research for Evolutional Science and Technology Program (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - Tomoya Matsumoto
- Core Research for Evolutional Science and Technology Program (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
- Department of Psychiatry and Neurosciences, Division of Frontier Medical Science, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Yumiko Numakawa
- Peptide-prima Co., Ltd., 1-25-81, Nuyamazu, Kumamoto 861-2102, Japan
| | - Misty Richards
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan
- The Center for Neuropharmacology and Neuroscience, Albany Medical College, Albany, NY 12208, USA
| | - Shigeto Yamawaki
- Core Research for Evolutional Science and Technology Program (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
- Department of Psychiatry and Neurosciences, Division of Frontier Medical Science, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan
- Core Research for Evolutional Science and Technology Program (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
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Hayashi T, Tsai SY, Mori T, Fujimoto M, Su TP. Targeting ligand-operated chaperone sigma-1 receptors in the treatment of neuropsychiatric disorders. Expert Opin Ther Targets 2011; 15:557-77. [PMID: 21375464 PMCID: PMC3076924 DOI: 10.1517/14728222.2011.560837] [Citation(s) in RCA: 169] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Current drugs for the treatment of psychiatric or neurodegenerative disorders have limitations. Psychotherapeutic drugs such as typical and atypical antipsychotics, tricyclic antidepressants and selective monoamine reuptake inhibitors, aim to normalize the hyper- or hypo-neurotransmission of monoaminergic systems. Despite their contribution to the outcomes of psychiatric patients, these agents often exert severe side effects and require chronic treatments to promote amelioration of symptoms. Drugs available for the treatment of neurodegenerative disorders are severely limited. AREAS COVERED Recent evidence that has shed light on sigma-1 receptor ligands, which may serve as a new class of antidepressants or neuroprotective agents. Sigma-1 receptors are novel ligand-operated molecular chaperones regulating signal transduction, ER stress, cellular redox, cellular survival and synaptogenesis. Selective sigma-1 receptor ligands exert rapid antidepressant-like, anxiolytic, antinociceptive and robust neuroprotective actions in preclinical studies. Recent studies that suggest that reactive oxygen species might play a role as signal integrators downstream of Sig-1Rs are also covered. EXPERT OPINION The advances in sigma receptor research in the last decade have begun to elucidate the intracellular signal cascades upstream and downstream of sigma-1 receptors. The novel ligand-operated properties of the sigma-1 receptor chaperone may enable interventions by which stress-related cellular systems can be pharmacologically controlled.
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Affiliation(s)
- Teruo Hayashi
- National Institute on Drug Abuse, National Institutes of Health-Cellular Stress Signaling Unit, Integrative Neuroscience Branch, Baltimore, MD 21224, USA.
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Deb I, Poddar R, Paul S. Oxidative stress-induced oligomerization inhibits the activity of the non-receptor tyrosine phosphatase STEP61. J Neurochem 2011; 116:1097-111. [PMID: 21198639 DOI: 10.1111/j.1471-4159.2010.07165.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The neuron-specific tyrosine phosphatase STriatal Enriched Phosphatase (STEP) is emerging as an important mediator of glutamatergic transmission in the brain. STEP is also thought to be involved in the etiology of neurodegenerative disorders that are linked to oxidative stress such as Alzheimer's disease and cerebral ischemia. However, the mechanism by which oxidative stress can modulate STEP activity is still unclear. In this study, we have investigated whether dimerization may play a role in regulating the activity of STEP. Our findings show that STEP(61), the membrane associated isoform, can undergo homodimerization under basal conditions in neurons. Dimerization of STEP(61) involves intermolecular disulfide bond formation between two cysteine residues (Cys 65 and Cys 76 respectively) present in the hydrophobic region at the N-terminus specific to STEP(61). Oxidative stress induced by hydrogen peroxide leads to a significant increase in the formation of dimers and higher-order oligomers of STEP(61). Using two substrates, para-nitrophenylphosphate and extracellular-regulated kinase MAPK we further demonstrate that oligomerization leads to a significant reduction in its enzymatic activity.
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Affiliation(s)
- Ishani Deb
- Department of Neurology, University of New Mexico Health Sciences Center, 1 University of New Mexico, Albuquerque, New Mexico 87131, USA
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Numakawa T, Yokomaku D, Richards M, Hori H, Adachi N, Kunugi H. Functional interactions between steroid hormones and neurotrophin BDNF. World J Biol Chem 2010; 1:133-43. [PMID: 21540998 PMCID: PMC3083963 DOI: 10.4331/wjbc.v1.i5.133] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 05/20/2010] [Accepted: 05/24/2010] [Indexed: 02/05/2023] Open
Abstract
Brain-derived neurotrophic factor (BDNF), a critical neurotrophin, regulates many neuronal aspects including cell differentiation, cell survival, neurotransmission, and synaptic plasticity in the central nervous system (CNS). Though BDNF has two types of receptors, high affinity tropomyosin-related kinase (Trk)B and low affinity p75 receptors, BDNF positively exerts its biological effects on neurons via activation of TrkB and of resultant intracellular signaling cascades including mitogen-activated protein kinase/extracellular signal-regulated protein kinase, phospholipase Cγ, and phosphoinositide 3-kinase pathways. Notably, it is possible that alteration in the expression and/or function of BDNF in the CNS is involved in the pathophysiology of various brain diseases such as stroke, Parkinson’s disease, Alzheimer’s disease, and mental disorders. On the other hand, glucocorticoids, stress-induced steroid hormones, also putatively contribute to the pathophysiology of depression. Interestingly, in addition to the reduction in BDNF levels due to increased glucocorticoid exposure, current reports demonstrate possible interactions between glucocorticoids and BDNF-mediated neuronal functions. Other steroid hormones, such as estrogen, are involved in not only sexual differentiation in the brain, but also numerous neuronal events including cell survival and synaptic plasticity. Furthermore, it is well known that estrogen plays a role in the pathophysiology of Parkinson’s disease, Alzheimer’s disease, and mental illness, while serving to regulate BDNF expression and/or function. Here, we present a broad overview of the current knowledge concerning the association between BDNF expression/function and steroid hormones (glucocorticoids and estrogen).
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Affiliation(s)
- Tadahiro Numakawa
- Tadahiro Numakawa, Misty Richards, Hiroaki Hori, Naoki Adachi, Hiroshi Kunugi, Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, 187-8502, Japan
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