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Sun N, Cui WQ, Min XM, Zhang GM, Liu JZ, Wu HY. A new perspective on hippocampal synaptic plasticity and post-stroke depression. Eur J Neurosci 2023; 58:2961-2984. [PMID: 37518943 DOI: 10.1111/ejn.16093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 08/01/2023]
Abstract
Post-stroke depression, a common complication after stroke, severely affects the recovery and quality of life of patients with stroke. Owing to its complex mechanisms, post-stroke depression treatment remains highly challenging. Hippocampal synaptic plasticity is one of the key factors leading to post-stroke depression; however, the precise molecular mechanisms remain unclear. Numerous studies have found that neurotrophic factors, protein kinases and neurotransmitters influence depressive behaviour by modulating hippocampal synaptic plasticity. This review further elaborates on the role of hippocampal synaptic plasticity in post-stroke depression by summarizing recent research and analysing possible molecular mechanisms. Evidence for the correlation between hippocampal mechanisms and post-stroke depression helps to better understand the pathological process of post-stroke depression and improve its treatment.
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Affiliation(s)
- Ning Sun
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Wen-Qiang Cui
- Department of Neurology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xiao-Man Min
- College of Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Guang-Ming Zhang
- College of Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Jia-Zheng Liu
- College of Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Hong-Yun Wu
- Department of Neurology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
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Liu X, Ren L, Yu S, Li G, He P, Yang Q, Wei X, Thai PN, Wu L, Huo Y. Late sodium current in synergism with Ca 2+/calmodulin-dependent protein kinase II contributes to β-adrenergic activation-induced atrial fibrillation. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220163. [PMID: 37122215 PMCID: PMC10150221 DOI: 10.1098/rstb.2022.0163] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
Atrial fibrillation (AF) is frequently associated with β-adrenergic stimulation, especially in patients with structural heart diseases. The objective of this study was to determine the synergism of late sodium current (late INa) and Ca2+/calmodulin-dependent protein kinase (CaMKII)-mediated arrhythmogenic activities in β-adrenergic overactivation-associated AF. Monophasic action potential, conduction properties, protein phosphorylation, ion currents and cellular trigger activities were measured from rabbit-isolated hearts, atrial tissue and atrial myocytes, respectively. Isoproterenol (ISO, 1-15 nM) increased atrial conduction inhomogeneity index, phospho-Nav1.5 and phospho-CaMKII protein levels and late INa by 108%, 65%, 135% and 87%, respectively, and induced triggered activities and episodes of AF in all hearts studied (p < 0.05). Sea anemone toxin II (ATX-II, 2 nM) was insufficient to induce any atrial arrhythmias, whereas the propensities of AF were greater in hearts treated with a combination of ATX-II and ISO. Ranolazine, eleclazine and KN-93 abolished ISO-induced AF, attenuated the phosphorylation of Nav1.5 and CaMKII, and reversed the increase of late INa (p < 0.05) in a synergistic mode. Overall, late INa in association with the activation of CaMKII potentiates β-adrenergic stimulation-induced AF and the inhibition of both late INa and CaMKII exerted synergistic anti-arrhythmic effects to suppress atrial arrhythmic activities associated with catecholaminergic activation. This article is part of the theme issue 'The heartbeat: its molecular basis and physiological mechanisms'.
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Affiliation(s)
- Xiaoyan Liu
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
- Department of Cardiology, Cardiovascular Center, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, People's Republic of China
| | - Lu Ren
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, CA, 95616, USA
| | - Shandong Yu
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
- Department of Cardiology, Cardiovascular Center, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, People's Republic of China
| | - Gang Li
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
| | - Pengkang He
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
| | - Qiaomei Yang
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
| | - Xiaohong Wei
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
| | - Phung N Thai
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, CA, 95616, USA
| | - Lin Wu
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, People's Republic of China
| | - Yong Huo
- Department of Cardiology, Peking University First Hospital, 8, Xishiku Street, West District, Beijing 100034, People's Republic of China
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Xu D, Xu C, Xue X, Xu Y, Zhao J, Huang T, Wang Z, Zhao Q, Zhou Z, Huang Y, Yu L, Wang H. Activation of cannabinoid receptor 2 attenuates Angiotensin II-induced atrial fibrillation via a potential NOX/CaMKII mechanism. Front Cardiovasc Med 2022; 9:968014. [PMID: 36312282 PMCID: PMC9616165 DOI: 10.3389/fcvm.2022.968014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 09/29/2022] [Indexed: 11/13/2022] Open
Abstract
Background Atrial fibrillation (AF) is the most frequent arrythmia managed in clinical practice. Several mechanisms have been proposed to contribute to the occurrence and persistence of AF, in which oxidative stress plays a non-negligible role. The endocannabinoid system (ECS) is involved in a variety physiological and pathological processes. Cannabinoid receptor 1 (CB1R) and cannabinoid receptor 2 (CB2R) are expressed in the heart, and studies have shown that activating CB2R has a protective effect on the myocardium. However, the role of CB2R in AF is unknown. Materials and methods Angiotensin II (Ang II)-infused mice were treated with the CB2R agonist AM1241 intraperitoneally for 21 days. Atrial structural remodeling, AF inducibility, electrical transmission, oxidative stress and fibrosis were measured in mice. Results The susceptibility to AF and the level of oxidative stress were increased significantly in Ang II-infused mice. In addition, nicotinamide adenine dinucleotide phosphate oxidase 2 (NOX2), NOX4, and oxidized Ca2+/calmodulin-dependent protein kinase II (ox-CaMKII) were highly expressed. More importantly, treatment with AM1241 activated CB2R, resulting in a protective effect. Conclusion The present study demonstrates that pharmacological activation of CB2R exerts a protective effect against AF via a potential NOX/CaMKII mechanism. CB2R is a potential therapeutic target for AF.
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Affiliation(s)
- Dengyue Xu
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China,Postgraduate College, China Medical University, Shenyang, Liaoning, China
| | - Chennian Xu
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Xiaodong Xue
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Yinli Xu
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Jikai Zhao
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Tao Huang
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Zhishang Wang
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Qiusheng Zhao
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Zijun Zhou
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Yuting Huang
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Liming Yu
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China,Liming Yu,
| | - Huishan Wang
- Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, Shenyang, Liaoning, China,*Correspondence: Huishan Wang,
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Liu Z, Zhang J, Miao L, Kong Q, Liu X, Yu L. A Novel CaMKII Inhibitory Peptide Blocks Relapse to Morphine Seeking by Influencing Synaptic Plasticity in the Nucleus Accumbens Shell. Brain Sci 2022; 12:985. [PMID: 35892425 DOI: 10.3390/brainsci12080985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/12/2022] [Accepted: 07/23/2022] [Indexed: 12/04/2022] Open
Abstract
Drugs of abuse cause enduring functional disorders in the brain reward circuits, leading to cravings and compulsive behavior. Although people may rehabilitate by detoxification, there is a high risk of relapse. Therefore, it is crucial to illuminate the mechanisms of relapse and explore the therapeutic strategies for prevention. In this research, by using an animal model of morphine self-administration in rats and a whole-cell patch–clamp in brain slices, we found changes in synaptic plasticity in the nucleus accumbens (NAc) shell were involved in the relapse to morphine-seeking behavior. Compared to the controls, the amplitude of long-term depression (LTD) induced in the medium spiny neurons increased after morphine self-administration was established, recovered after the behavior was extinguished, and increased again during the relapse induced by morphine priming. Intravenous injection of MA, a new peptide obtained by modifying Ca2+/calmodulin-dependent protein kinase II (CaMKII) inhibitor “myr-AIP”, decreased CaMKII activity in the NAc shell and blocked the reinstatement of morphine-seeking behavior without influence on the locomotor activity. Moreover, LTD was absent in the NAc shell of the MA-pretreated rats, whereas it was robust in the saline controls in which morphine-seeking behavior was reinstated. These results indicate that CaMKII regulates morphine-seeking behavior through its involvement in the change of synaptic plasticity in the NAc shell during the relapse, and MA may be of great value in the clinical treatment of relapse to opioid seeking.
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Lin TK, Hung CF, Weng JR, Hsieh TY, Wang SJ. Kaempferol 3-Rhamnoside on Glutamate Release from Rat Cerebrocortical Nerve Terminals Involves P/Q-Type Ca 2+ Channel and Ca 2+/Calmodulin-Dependent Protein Kinase II-Dependent Pathway Suppression. Molecules 2022; 27:molecules27041342. [PMID: 35209129 PMCID: PMC8879690 DOI: 10.3390/molecules27041342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/12/2022] [Accepted: 02/14/2022] [Indexed: 11/22/2022]
Abstract
Excess synaptic glutamate release has pathological consequences, and the inhibition of glutamate release is crucial for neuroprotection. Kaempferol 3-rhamnoside (KR) is a flavonoid isolated from Schima superba with neuroprotective properties, and its effecton the release of glutamate from rat cerebrocortical nerve terminals was investigated. KR produced a concentration-dependent inhibition of 4-aminopyridine (4-AP)-evoked glutamate release with half-maximal inhibitory concentration value of 17 µM. The inhibition of glutamate release by KR was completely abolished by the omission of external Ca2+ or the depletion of glutamate in synaptic vesicles, and it was unaffected by blocking carrier-mediated release. In addition, KR reduced the 4-AP-evoked increase in Ca2+ concentration, while it did not affect 4-AP-evoked membrane potential depolarization. The application of selective antagonists of voltage-dependent Ca2+ channels revealed that the KR-mediated inhibition of glutamate release involved the suppression of P/Q-type Ca2+ channel activity. Furthermore, the inhibition of release was abolished by the calmodulin antagonist, W7, and Ca2+/calmodulin-dependent protein kinase II (CaMKII) inhibitor, KN62, but not by the protein kinase A (PKA) inhibitor, H89, or the protein kinase C (PKC) inhibitor, GF109203X. We also found that KR reduced the 4-AP-induced increase in phosphorylation of CaMKII and its substrate synapsin I. Thus, the effect of KR on evoked glutamate release is likely linked to a decrease in P/Q-type Ca2+ channel activity, as well as to the consequent reduction in the CaMKII/synapsin I pathway.
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Affiliation(s)
- Tzu-Kang Lin
- Department of Neurosurgery, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
| | - Chi-Feng Hung
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
| | - Jing-Ru Weng
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan;
| | - Ting-Yang Hsieh
- P.H.D. Program in Nutrition & Food Science, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
| | - Su-Jane Wang
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan
- Correspondence: ; Tel.: +886-2-2905-3465; Fax: +886-2-2905-2096
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Chen W, Chen Y, Su J, Kang J, Ding Y, Ai W, Zhang J, Luo H, An P. CaMKII Mediates TGFβ1-Induced Fibroblasts Activation and Its Cross Talk with Colon Cancer Cells. Dig Dis Sci 2022; 67:134-45. [PMID: 33528688 DOI: 10.1007/s10620-021-06847-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 01/12/2021] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Cancer-associated fibroblasts (CAFs), as the activated fibroblasts in tumor stroma, are important modifiers of tumor progression. TGFβ1 has been the mostly accepted factor to fuel normal fibroblasts transformation into CAFs. Ca2+/calmodulin-dependent protein kinase II (CaMKII) is thought to play an important role in fibroblasts activation induced by TGFβ1. The aim of this study is to investigate the potential role of CaMKII in TGFβ1-induced fibroblasts activation and CAF-like differentiation. Cross talk between CaMKII-dependent fibroblasts and colon cancer in colon cancer progression also was addressed RESULTS: Immunostaining demonstrated that in colon cancer stroma, CaMKII overexpressed in stromal CAFs. In vitro, TGFβ1 increased CAF markers expression in human colon fibroblasts CCD-18Co, but not in CaMKII depletion fibroblasts. CaMKII knockdown by CaMKII shRNA significantly inhibited TGFβ1-induced fibroblasts activation and CAF-like differentiation. Smad3, AKT, and MAPK were targeted in TGFβ1-CaMKII-mediated pathway. Human colon cancer cell line HCT-116 activated fibroblasts directly, whereas CaMKII depletion dragged CCD-18Co fibroblasts undergoing CAF-associated trans-differentiation. Furthermore, increased proliferation, migration, and invasion of colon cancer cells were stimulated when co-cultured with normal fibroblasts, but not with CaMKII depletion fibroblasts. CONCLUSIONS These findings provide evidence that CaMKII is a critical mediator in TGFβ1-induced fibroblasts activation and is involved in the cross talk with colon cancer cells. CaMKII is a potentially effective target for future treatment of colon cancer.
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Guo Y, Yu ZY, Wu J, Gong H, Kesteven S, Iismaa SE, Chan AY, Holman S, Pinto S, Pironet A, Cox CD, Graham RM, Vennekens R, Feneley MP, Martinac B. The Ca 2+-activated cation channel TRPM4 is a positive regulator of pressure overload-induced cardiac hypertrophy. eLife 2021; 10:66582. [PMID: 34190686 PMCID: PMC8245133 DOI: 10.7554/elife.66582] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 06/20/2021] [Indexed: 01/19/2023] Open
Abstract
Pathological left ventricular hypertrophy (LVH) occurs in response to pressure overload and remains the single most important clinical predictor of cardiac mortality. The molecular pathways in the induction of pressure overload LVH are potential targets for therapeutic intervention. Current treatments aim to remove the pressure overload stimulus for LVH, but do not completely reverse adverse cardiac remodelling. Although numerous molecular signalling steps in the induction of LVH have been identified, the initial step by which mechanical stretch associated with cardiac pressure overload is converted into a chemical signal that initiates hypertrophic signalling remains unresolved. In this study, we show that selective deletion of transient receptor potential melastatin 4 (TRPM4) channels in mouse cardiomyocytes results in an approximately 50% reduction in the LVH induced by transverse aortic constriction. Our results suggest that TRPM4 channel is an important component of the mechanosensory signalling pathway that induces LVH in response to pressure overload and represents a potential novel therapeutic target for the prevention of pathological LVH.
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Affiliation(s)
- Yang Guo
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,Cardiac Physiology and Transplantation Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Ze-Yan Yu
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,Cardiac Physiology and Transplantation Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Jianxin Wu
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia
| | - Hutao Gong
- Cardiac Physiology and Transplantation Division, Victor Chang Cardiac Research Institute, Sydney, Australia
| | - Scott Kesteven
- Cardiac Physiology and Transplantation Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Siiri E Iismaa
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Andrea Y Chan
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia
| | - Sara Holman
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia
| | - Silvia Pinto
- Laboratory of Ion Channel Research, Department of Molecular and Cellular Medicine, Katholieke Universiteit Leuven, Leuven, Belgium.,TRP Research Platform Leuven (TRPLe), Katholieke Universiteit Leuven, Leuven, Belgium
| | - Andy Pironet
- Laboratory of Ion Channel Research, Department of Molecular and Cellular Medicine, Katholieke Universiteit Leuven, Leuven, Belgium.,TRP Research Platform Leuven (TRPLe), Katholieke Universiteit Leuven, Leuven, Belgium
| | - Charles D Cox
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Robert M Graham
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Rudi Vennekens
- Laboratory of Ion Channel Research, Department of Molecular and Cellular Medicine, Katholieke Universiteit Leuven, Leuven, Belgium.,TRP Research Platform Leuven (TRPLe), Katholieke Universiteit Leuven, Leuven, Belgium
| | - Michael P Feneley
- Cardiac Physiology and Transplantation Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia.,Department of Cardiology, St Vincent's Hospital, Sydney, Australia
| | - Boris Martinac
- Molecular Cardiology and Biophysics Division, Victor Chang Cardiac Research Institute, Sydney, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
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Wang L, Ginnan RG, Wang YX, Zheng YM. Interactive Roles of CaMKII/Ryanodine Receptor Signaling and Inflammation in Lung Diseases. Adv Exp Med Biol 2021; 1303:305-317. [PMID: 33788199 DOI: 10.1007/978-3-030-63046-1_16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Ca2+/calmodulin-dependent protein kinase II (CaMKII) is a multifunctional protein kinase and has been recently recognized to play a vital role in pathological events in the pulmonary system. CaMKII has diverse downstream targets that promote vascular disease, asthma, and cancer, so improved understanding of CaMKII signaling has the potential to lead to new therapies for lung diseases. Multiple studies have demonstrated that CaMKII is involved in redox modulation of ryanodine receptors (RyRs). CaMKII can be directly activated by reactive oxygen species (ROS) which then regulates RyR activity, which is essential for Ca2+-dependent processes in lung diseases. Furthermore, both CaMKII and RyRs participate in the inflammation process. However, their role in the pulmonary physiology in response to ROS is still an ambiguous one. Because CaMKII and RyRs are important in pulmonary biology, cell survival, cell cycle control, and inflammation, it is possible that the relationship between ROS and CaMKII/RyRs signal complex will be necessary for understanding and treating lung diseases. Here, we review roles of CaMKII/RyRs in lung diseases to understand with how CaMKII/RyRs may act as a transduction signal to connect prooxidant conditions into specific downstream pathological effects that are relevant to rare and common forms of pulmonary disease.
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Affiliation(s)
- Lan Wang
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA.,Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, Tongji University, Shanghai, China
| | - Roman G Ginnan
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA
| | - Yong-Xiao Wang
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA.
| | - Yun-Min Zheng
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, USA.
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Chung CC, Lin YK, Kao YH, Lin SH, Chen YJ. Physiological testosterone attenuates profibrotic activities of rat cardiac fibroblasts through modulation of nitric oxide and calcium homeostasis. Endocr J 2021; 68:307-315. [PMID: 33115984 DOI: 10.1507/endocrj.ej20-0344] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Testosterone deficiency is associated with poor prognosis among patients with chronic heart failure (HF). Physiological testosterone improves the exercise capacity of patients with HF. In this study, we evaluated whether treatment with physiological testosterone contributes to anti-fibrogenesis by modifying calcium homeostasis in cardiac fibroblasts and we studied the underlying mechanisms. Nitric oxide (NO) analyses, calcium (Ca2+) fluorescence, and Western blotting were performed in primary isolated rat cardiac fibroblasts with or without (control cells) testosterone (10, 100, 1,000 nmol/L) treatment for 48 hours. Physiological testosterone (10 nmol/L) increased NO production and phosphorylation at the inhibitory site of the inositol trisphosphate (IP3) receptor, thereby reducing Ca2+ entry, phosphorylated Ca2+/calmodulin-dependent protein kinase II (CaMKII) expression, type I and type III pro-collagen production. Non-physiological testosterone-treated fibroblasts exhibited similar NO and collagen production capabilities as compared to control (testosterone deficient) fibroblasts. These effects were blocked by co-treatment with NO inhibitor (L-NG-nitro arginine methyl ester [L-NAME], 100 μmol/L). In the presence of the IP3 receptor inhibitor (2-aminoethyl diphenylborinate [2-APB], 50 μmol/L), testosterone-deficient and physiological testosterone-treated fibroblasts exhibited similar phosphorylated CaMKII expression. When treated with 2-APB or CaMKII inhibitor (KN93, 10 μmol/L), testosterone-deficient and physiological testosterone-treated fibroblasts exhibited similar type I, and type III collagen production. In conclusion, physiological testosterone activates NO production, and attenuates the IP3 receptor/Ca2+ entry/CaMKII signaling pathway, thereby inhibiting the collagen production capability of cardiac fibroblasts.
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Affiliation(s)
- Cheng-Chih Chung
- Division of Cardiology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
- Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan
| | - Yung-Kuo Lin
- Division of Cardiology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
- Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan
| | - Yu-Hsun Kao
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Medical Education and Research, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Shyh-Hsiang Lin
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei, Taiwan
| | - Yi-Jen Chen
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
- Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Cardiovascular Research Center, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
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10
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Jia W, Kawahata I, Cheng A, Fukunaga K. The Role of CaMKII and ERK Signaling in Addiction. Int J Mol Sci 2021; 22:3189. [PMID: 33804804 DOI: 10.3390/ijms22063189] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/17/2021] [Accepted: 03/19/2021] [Indexed: 12/12/2022] Open
Abstract
Nicotine is the predominant addictive compound of tobacco and causes the acquisition of dependence through its interactions with nicotinic acetylcholine receptors and various neurotransmitter releases in the central nervous system. The Ca2+/calmodulin-dependent protein kinase II (CaMKII) and extracellular signal-regulated kinase (ERK) play a pivotal role in synaptic plasticity in the hippocampus. CaMKII is involved in long-term potentiation induction, which underlies the consolidation of learning and memory; however, the roles of CaMKII in nicotine and other psychostimulant-induced addiction still require further investigation. This article reviews the molecular mechanisms and crucial roles of CaMKII and ERK in nicotine and other stimulant drug-induced addiction. We also discuss dopamine (DA) receptor signaling involved in nicotine-induced addiction in the brain reward circuitry. In the last section, we introduce the association of polyunsaturated fatty acids and cellular chaperones of fatty acid-binding protein 3 in the context of nicotine-induced addiction in the mouse nucleus accumbens and provide a novel target for the treatment of drug abuse affecting dopaminergic systems.
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McKee C, Bare DJ, Ai X. Stress-driven cardiac calcium mishandling via a kinase-to-kinase crosstalk. Pflugers Arch 2021; 473:363-75. [PMID: 33590296 DOI: 10.1007/s00424-021-02533-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/19/2021] [Accepted: 02/02/2021] [Indexed: 01/25/2023]
Abstract
Calcium homeostasis in the cardiomyocyte is critical to the regulation of normal cardiac function. Abnormal calcium dynamics such as altered uptake by the sarcoplasmic reticulum (SR) Ca2+-ATPase and increased diastolic SR calcium leak are involved in the development of maladaptive cardiac remodeling under pathological conditions. Ca2+/calmodulin-dependent protein kinase II-δ (CaMKIIδ) is a well-recognized key molecule in calcium dysregulation in cardiomyocytes. Elevated cellular stress is known as a common feature during pathological remodeling, and c-jun N-terminal kinase (JNK) is an important stress kinase that is activated in response to intrinsic and extrinsic stress stimuli. Our lab recently identified specific actions of JNK isoform 2 (JNK2) in CaMKIIδ expression, activation, and CaMKIIδ-dependent SR Ca2+ mishandling in the stressed heart. This review focuses on the current understanding of cardiac SR calcium handling under physiological and pathological conditions as well as the newly identified contribution of the stress kinase JNK2 in CaMKIIδ-dependent SR Ca2+ abnormal mishandling. The new findings identifying dual roles of JNK2 in CaMKIIδ expression and activation are also discussed in this review.
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Jia W, Wilar G, Kawahata I, Cheng A, Fukunaga K. Impaired Acquisition of Nicotine-Induced Conditioned Place Preference in Fatty Acid-Binding Protein 3 Null Mice. Mol Neurobiol 2021; 58:2030-2045. [PMID: 33411237 DOI: 10.1007/s12035-020-02228-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 11/24/2020] [Indexed: 10/22/2022]
Abstract
Nicotine causes psychological dependence through its interactions with nicotinic acetylcholine receptors in the brain. We previously demonstrated that fatty acid-binding protein 3 (FABP3) colocalizes with dopamine D2 receptors (D2Rs) in the dorsal striatum, and FABP3 deficiency leads to impaired D2R function. Moreover, D2R null mice do not exhibit increased nicotine-induced conditioned place preference (CPP) following chronic nicotine administration. To investigate the role of FABP3 in nicotine-induced CPP, FABP3 knockout (FABP3-/-) mice were evaluated using a CPP apparatus following consecutive nicotine administration (0.5 mg/kg) for 14 days. Importantly, nicotine-induced CPP was suppressed in the conditioning, withdrawal, and relapse phases in FABP3-/- mice. To resolve the mechanisms underlying impaired nicotine-induced CPP in these mice, we assessed c-Fos expression and Ca2+/calmodulin-dependent protein kinase II (CaMKII) and extracellular signal-regulated kinase (ERK) signaling in both dopamine D1 receptor (D1R)- and D2R-positive neurons in the nucleus accumbens (NAc). Notably, 64% of dopamine receptor-positive neurons in the mouse NAc expressed both D1R and D2R. Impaired nicotine-induced CPP was correlated with lack of responsiveness of both CaMKII and ERK phosphorylation. The number of D2R-positive neurons was increased in FABP3-/- mice, while the number of D1R-positive neurons and the responsiveness of c-Fos expression to nicotine were decreased. The aberrant c-Fos expression was closely correlated with CaMKII but not ERK phosphorylation levels in the NAc of FABP3-/- mice. Taken together, these results indicate that impaired D2R signaling due to lack of FABP3 may affect D1R and c-Fos signaling and underlie nicotine-induced CPP behaviors.
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Affiliation(s)
- Wenbin Jia
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai, 980-0845, Japan
| | - Gofarana Wilar
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai, 980-0845, Japan.,Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, JL. Raya Bandung-Sumedang KM 20.5 Jatinangor, Sumedang, Jawa Barat, 45363, Indonesia
| | - Ichiro Kawahata
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai, 980-0845, Japan
| | - An Cheng
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai, 980-0845, Japan
| | - Kohji Fukunaga
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai, 980-0845, Japan. .,, Sendai, Japan.
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13
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Ma Y, Cheng N, Sun J, Lu JX, Abbasi S, Wu G, Lee AS, Sawamura T, Cheng J, Chen CH, Xi Y. Atherogenic L5 LDL induces cardiomyocyte apoptosis and inhibits K ATP channels through CaMKII activation. Lipids Health Dis 2020; 19:189. [PMID: 32825832 PMCID: PMC7441649 DOI: 10.1186/s12944-020-01368-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 08/11/2020] [Indexed: 12/30/2022] Open
Abstract
Background Cardiac Ca2+/calmodulin-dependent protein kinase II (CaMKII) activation plays a critical role in cardiomyocyte (CM) apoptosis and arrhythmia. Functional ATP-sensitive potassium (KATP) channels are essential for cardiac protection during ischemia. In cultured CMs, L5 low-density lipoprotein (LDL) induces apoptosis and QTc prolongation. L5 is a highly electronegative and atherogenic aberrant form of LDL, and its levels are significantly higher in patients with cardiovascular-related diseases. Here, the role of L5 in cardiac injury was studied by evaluating the effects of L5 on CaMKII activity and KATP channel physiology in CMs. Methods Cultured neonatal rat CMs (NRCMs) were treated with a moderate concentration (ie, 7.5 μg/mL) of L5 or L1 (the least electronegative LDL subfraction). NRCMs were examined for apoptosis and viability, CaMKII activity, and the expression of phosphorylated CaMKIIδ and NOX2/gp91phox. The function of KATP and action potentials (APs) was analyzed by using the patch-clamp technique. Results In NRCMs, L5 but not L1 significantly induced cell apoptosis and reduced cell viability. Furthermore, L5 decreased Kir6.2 expression by more than 50%. Patch-clamp analysis showed that L5 reduced the KATP current (IKATP) density induced by pinacidil, a KATP opener. The partial recovery of the inward potassium current during pinacidil washout was susceptible to subsequent inhibition by the IKATP blocker glibenclamide. Suppression of IKATP by L5 significantly prolonged the AP duration. L5 also significantly increased the activity of CaMKII, the phosphorylation of CaMKIIδ, and the expression of NOX2/gp91phox. L5-induced apoptosis was prevented by the addition of the CaMKII inhibitor KN93 and the reactive oxygen species scavenger Mn (III)TBAP. Conclusions L5 but not L1 induces CM damage through the activation of the CaMKII pathway and increases arrhythmogenicity in CMs by modulating the AP duration. These results help to explain the harmful effects of L5 in cardiovascular-related disease.
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Affiliation(s)
- Yanzhuo Ma
- Department of Cardiology, Bethune International Peace Hospital, 398 Zhongshan Xilu, Shijiazhuang, 050082, Hebei, China.,Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - Nancy Cheng
- Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - Junping Sun
- Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - Jonathan Xuhai Lu
- Vascular and Medicinal Research, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA.,InVitro Cell Research, LLC, 106 Grand Avenue, Suite 290, Englewood, NJ, 07631, USA
| | - Shahrzad Abbasi
- Molecular Cardiology Research, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, USA
| | - Geru Wu
- Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - An-Sheng Lee
- Department of Medicine, Mackay Medical College, No. 46, Section 3, Zhongzheng Road, Sanzhi District, New Taipei City, Taiwan, 252.,Cardiovascular Research Laboratory, China Medical University Hospital, No. 2 Yude Road, North District, Taichung City, Taiwan
| | - Tatsuya Sawamura
- Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, 3-1-1, Asahi, Matsumoto, Nagano, 390-8621, Japan.,Department of Molecular Pathophysiology, Shinshu University School of Medicine, 3 Chome-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Jie Cheng
- Cardiac Electrophysiology Research Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA
| | - Chu-Huang Chen
- Vascular and Medicinal Research, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX, 77030, USA. .,Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, 3-1-1, Asahi, Matsumoto, Nagano, 390-8621, Japan.
| | - Yutao Xi
- Department of Cardiology, Bethune International Peace Hospital, 398 Zhongshan Xilu, Shijiazhuang, 050082, Hebei, China. .,, 6770 Bertner Street, MC 2-255, Houston, TX, 77030, USA.
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Abstract
Accumulating evidence indicates that inhalation anesthetics induce or increase the risk of cognitive impairment. GLYX-13 (rapastinel) acts on the glycine site of N-methyl-D-aspartate receptors (NMDARs) and has been shown to enhance hippocampus-dependent learning and memory function. However, the mechanisms by which GLYX-13 affects learning and memory function are still unclear. In this study, we investigated these mechanisms in a mouse model of long-term anesthesia exposure. Mice were intravenously administered 1 mg/kg GLYX-13 at 2 hours before isoflurane exposure (1.5% for 6 hours). Cognitive function was assessed using the contextual fear conditioning test and the novel object recognition test. The mRNA expression and phosphorylated protein levels of NMDAR pathway components, N-methyl-D-aspartate receptor subunit 2B(NR2B)-Ca2+/calmodulin dependent protein kinase II (CaMKII)-cyclic adenosine monophosphate response element binding protein (CREB), in the hippocampus were evaluated by quantitative RT-PCR and western blot assay. Pretreatment with GLYX-13 ameliorated isoflurane exposure-induced cognitive impairment and restored NR2B, CaMKII and CREB mRNA and phosphorylated protein levels. Intracerebroventricular injection of KN93, a selective CaMKII inhibitor, significantly diminished the effect of GLYX-13 on cognitive function and NR2B, CaMKII and CREB levels in the hippocampus. Taken together, our findings suggest that GLYX-13 pretreatment alleviates isoflurane-induced cognitive dysfunction by protecting against perturbation of the NR2B/CaMKII/CREB signaling pathway in the hippocampus. Therefore, GLYX-13 may have therapeutic potential for the treatment of anesthesia-induced cognitive dysfunction. This study was approved by the Experimental Animal Ethics Committee of Drum Tower Hospital affiliated to the Medical College of Nanjing University, China (approval No. 20171102) on November 20, 2017.
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Affiliation(s)
- Huan Liu
- Department of Anesthesiology, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Xiang-Dan Gong
- Department of Anesthesiology, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Xin Zhao
- Department of Anesthesiology, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Yue Qian
- Department of Anesthesiology, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Xiao-Ping Gu
- Department of Anesthesiology, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - Tian-Jiao Xia
- Department of Anesthesiology, The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School; Jiangsu Key Laboratory of Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu Province, China
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15
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Inagaki R, Moriguchi S, Fukunaga K. Kir6.1 Heterozygous Mice Exhibit Aberrant Amygdala-Dependent Cued Fear Memory. Mol Neurobiol 2020; 57:1622-35. [PMID: 31808063 DOI: 10.1007/s12035-019-01840-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 11/18/2019] [Indexed: 10/25/2022]
Abstract
ATP-sensitive K+ (KATP) channels are predominantly expressed in the brain and consist of four identical inward-rectifier potassium ion channel subunits (Kir6.1 or Kir6.2) and four identical high-affinity sulfonylurea receptor subunits (SUR1, SUR2A, or SUR2B). We previously observed that chronic corticosterone-treated (CORT) mice exhibited enhanced anxiety-like behaviors and cued fear memory. In the present study, the protein and mRNA expression levels of Kir6.1, but not Kir6.2, were decreased in the lateral amygdala (LA) of CORT mice. Heterozygous Kir6.1-null (Kir6.1+/-) mice also showed enhanced tone (cued) fear memory and long-term potentiation (LTP) in the cortico-LA pathway compared to those in wild-type mice. However, LTP was not enhanced in the hippocampal CA1 regions of Kir6.1+/- mice. Consistent with increased cued fear memory, both Ca2+/calmodulin-dependent protein kinase II (CaMKII) and extracellular signal-regulated kinase (ERK) activities were significantly elevated in the LAs of Kir6.1+/- mice after tone stimulation. Our results indicate that increased CaMKII and ERK activities may induce LTP in the LA in Kir6.1+/- mice, leading to aberrant cued fear memory. The changes in neural plasticity in the LA of Kir6.1+/- mice were associated with anxiety-like behaviors and may be related to the pathogenic mechanisms of anxiety disorders in human patients.
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16
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Shen Y, Guo S, Chen G, Ding Y, Wu Y, Tian W. Hyperglycemia Induces Osteoclastogenesis and Bone Destruction Through the Activation of Ca 2+/Calmodulin-Dependent Protein Kinase II. Calcif Tissue Int 2019; 104:390-401. [PMID: 30506439 DOI: 10.1007/s00223-018-0499-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 11/24/2018] [Indexed: 02/07/2023]
Abstract
Hyperglycemia induces osteoclastogenesis and bone resorption through complicated, undefined mechanisms. Ca2+/calmodulin-dependent protein kinase II (CaMKII) promotes osteoclastogenesis, and could be activated by hyperglycemia. Here, we investigated whether CaMKII is involved in hyperglycemia-induced osteoclastogenesis and subsequent bone resorption. Osteoclast formation, bone resorption, CaMKII expression and phosphorylation were measured under high glucose in vitro and in streptozotocin-induced hyperglycemia rats with or without CaMKII inhibitor KN93. The results showed that 25 mmol/L high glucose in vitro promoted cathepsin K and tartrate-resistant acid phosphatase expression (p < 0.05) and osteoclast formation (p < 0.01) associated with enhancing β isoform expression (p < 0.05) and CaMKII phosphorylation (p < 0.001). Hyperglycemia promoted the formation of osteoclasts and resorption of trabecular and alveolar bone, and inhibited sizes of femur and mandible associated with enhanced CaMKII phosphorylation (p < 0.001) in rats. All these changes could be alleviated by KN93. These findings imply that CaMKII participates not only in hyperglycemia-induced osteoclastogenesis and subsequent bone resorption, but also in the hyperglycemia-induced developmental inhibition of bone.
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Affiliation(s)
- Yanxin Shen
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Shujuan Guo
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
- Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Guoqing Chen
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Yi Ding
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
- Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Yafei Wu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China.
- Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China.
| | - Weidong Tian
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China.
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China.
- Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, People's Republic of China.
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17
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Gui L, Guo X, Zhang Z, Xu H, Ji YW, Wang RJ, Zhu JH, Chen QH. Activation of CaMKIIδA promotes Ca 2+ leak from the sarcoplasmic reticulum in cardiomyocytes of chronic heart failure rats. Acta Pharmacol Sin 2018; 39:1604-12. [PMID: 29900930 DOI: 10.1038/aps.2018.20] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 02/19/2018] [Indexed: 12/14/2022] Open
Abstract
Activation of the Ca2+/calmodulin-dependent protein kinase II isoform δA (CaMKIIδA) disturbs intracellular Ca2+ homeostasis in cardiomyocytes during chronic heart failure (CHF). We hypothesized that upregulation of CaMKIIδA in cardiomyocytes might enhance Ca2+ leak from the sarcoplasmic reticulum (SR) via activation of phosphorylated ryanodine receptor type 2 (P-RyR2) and decrease Ca2+ uptake by inhibition of SR calcium ATPase 2a (SERCA2a). In this study, CHF was induced in rats by ligation of the left anterior descending coronary artery. We found that CHF caused an increase in the expression of CaMKIIδA and P-RyR2 in the left ventricle (LV). The role of CaMKIIδA in regulation of P-RyR2 was elucidated in cardiomyocytes isolated from neonatal rats in vitro. Hypoxia induced upregulation of CaMKIIδA and activation of P-RyR2 in the cardiomyocytes, which both were attenuated by knockdown of CaMKIIδA. Furthermore, we showed that knockdown of CaMKIIδA significantly decreased the Ca2+ leak from the SR elicited by hypoxia in the cardiomyocytes. In addition, CHF also induced a downregulation of SERCA2a in the LV of CHF rats. Knockdown of CaMKIIδA normalized hypoxia-induced downregulation of SERCA2a in cardiomyocytes in vitro. The results demonstrate that the inhibition of CaMKIIδA may improve cardiac function by preventing SR Ca2+ leak through downregulation of P-RyR2 and upregulation of SERCA2a expression in cardiomyocytes in CHF.
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18
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Howard T, Greer-Short A, Satroplus T, Patel N, Nassal D, Mohler PJ, Hund TJ. CaMKII-dependent late Na + current increases electrical dispersion and arrhythmia in ischemia-reperfusion. Am J Physiol Heart Circ Physiol 2018; 315:H794-H801. [PMID: 29932771 DOI: 10.1152/ajpheart.00197.2018] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The mechanisms underlying Ca2+/calmodulin-dependent protein kinase II (CaMKII)-induced arrhythmias in ischemia-reperfusion (I/R) are not fully understood. We tested the hypothesis that CaMKII increases late Na+ current ( INa,L) via phosphorylation of Nav1.5 at Ser571 during I/R, thereby increasing arrhythmia susceptibility. To test our hypothesis, we studied isolated, Langendorff-perfused hearts from wild-type (WT) mice and mice expressing Nav channel variants Nav1.5-Ser571E (S571E) and Nav1.5-Ser571A (S571A). WT hearts showed a significant increase in the levels of phosphorylated CaMKII and Nav1.5 at Ser571 [p-Nav1.5(S571)] after 15 min of global ischemia (just before the onset of reperfusion). Optical mapping experiments revealed an increase in action potential duration (APD) and APD dispersion without changes in conduction velocity during I/R in WT and S571E compared with S571A hearts. At the same time, WT and S571E hearts showed an increase in spontaneous arrhythmia events (e.g., premature ventricular contractions) and an increase in the inducibility of reentrant arrhythmias during reperfusion. Pretreatment of WT hearts with the Na+ channel blocker mexiletine (10 μM) normalized APD dispersion and reduced arrhythmia susceptibility during I/R. We conclude that CaMKII-dependent phosphorylation of Nav1.5 is a crucial driver for increased INa,L, arrhythmia triggers, and substrate during I/R. Selective targeting of this CaMKII-dependent pathway may have therapeutic potential for reducing arrhythmias in the setting of I/R. NEW & NOTEWORTHY Ca2+/calmodulin-dependent protein kinase II (CaMKII) phosphorylation of Nav1.5 at Ser571 leads to a prolongation of action potential duration (APD), increased APD dispersion, and increased arrhythmia susceptibility after ischemia-reperfusion in isolated mouse hearts. Genetic ablation of the CaMKII-dependent phosphorylation site Ser571 on Nav1.5 or low-dose mexiletine (to inhibit late Na+ current) reduced APD dispersion, arrhythmia triggers, and ventricular tachycardia inducibility.
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Affiliation(s)
- Taylor Howard
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center , Columbus, Ohio.,Department of Biomedical Engineering, College of Engineering, The Ohio State University , Columbus, Ohio
| | - Amara Greer-Short
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center , Columbus, Ohio.,Department of Biomedical Engineering, College of Engineering, The Ohio State University , Columbus, Ohio
| | - Tony Satroplus
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center , Columbus, Ohio.,Department of Biomedical Engineering, College of Engineering, The Ohio State University , Columbus, Ohio
| | - Nehal Patel
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center , Columbus, Ohio.,Department of Biomedical Engineering, College of Engineering, The Ohio State University , Columbus, Ohio
| | - Drew Nassal
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center , Columbus, Ohio.,Department of Biomedical Engineering, College of Engineering, The Ohio State University , Columbus, Ohio
| | - Peter J Mohler
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center , Columbus, Ohio.,Department of Internal Medicine, The Ohio State University Wexner Medical Center , Columbus, Ohio.,Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center , Columbus, Ohio
| | - Thomas J Hund
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center , Columbus, Ohio.,Department of Biomedical Engineering, College of Engineering, The Ohio State University , Columbus, Ohio.,Department of Internal Medicine, The Ohio State University Wexner Medical Center , Columbus, Ohio
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Shioda N, Fukunaga K. Physiological and Pathological Roles of CaMKII-PP1 Signaling in the Brain. Int J Mol Sci 2017; 19:E20. [PMID: 29271887 DOI: 10.3390/ijms19010020] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 01/25/2023] Open
Abstract
Ca2+/calmodulin (CaM)-dependent protein kinase II (CaMKII), a multifunctional serine (Ser)/threonine (Thr) protein kinase, regulates diverse activities related to Ca2+-mediated neuronal plasticity in the brain, including synaptic activity and gene expression. Among its regulators, protein phosphatase-1 (PP1), a Ser/Thr phosphatase, appears to be critical in controlling CaMKII-dependent neuronal signaling. In postsynaptic densities (PSDs), CaMKII is required for hippocampal long-term potentiation (LTP), a cellular process correlated with learning and memory. In response to Ca2+ elevation during hippocampal LTP induction, CaMKIIα, an isoform that translocates from the cytosol to PSDs, is activated through autophosphorylation at Thr286, generating autonomous kinase activity and a prolonged Ca2+/CaM-bound state. Moreover, PP1 inhibition enhances Thr286 autophosphorylation of CaMKIIα during LTP induction. By contrast, CaMKII nuclear import is regulated by Ser332 phosphorylation state. CaMKIIδ3, a nuclear isoform, is dephosphorylated at Ser332 by PP1, promoting its nuclear translocation, where it regulates transcription. In this review, we summarize physio-pathological roles of CaMKII/PP1 signaling in neurons. CaMKII and PP1 crosstalk and regulation of gene expression is important for neuronal plasticity as well as survival and/or differentiation.
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Jin L, Piao ZH, Liu CP, Sun S, Liu B, Kim GR, Choi SY, Ryu Y, Kee HJ, Jeong MH. Gallic acid attenuates calcium calmodulin-dependent kinase II-induced apoptosis in spontaneously hypertensive rats. J Cell Mol Med 2017; 22:1517-1526. [PMID: 29266709 PMCID: PMC5824377 DOI: 10.1111/jcmm.13419] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 09/21/2017] [Indexed: 11/28/2022] Open
Abstract
Hypertension causes cardiac hypertrophy and leads to heart failure. Apoptotic cells are common in hypertensive hearts. Ca2+/calmodulin‐dependent protein kinase II (CaMKII) is associated with apoptosis. We recently demonstrated that gallic acid reduces nitric oxide synthase inhibition‐induced hypertension. Gallic acid is a trihydroxybenzoic acid and has been shown to have beneficial effects, such as anti‐cancer, anti‐calcification and anti‐oxidant activity. The purpose of this study was to determine whether gallic acid regulates cardiac hypertrophy and apoptosis in essential hypertension. Gallic acid significantly lowered systolic and diastolic blood pressure in spontaneously hypertensive rats (SHRs). Wheat germ agglutinin (WGA) and H&E staining revealed that gallic acid reduced cardiac enlargement in SHRs. Gallic acid treatment decreased cardiac hypertrophy marker genes, including atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP), in SHRs. The four isoforms, α, β, δ and γ, of CaMKII were increased in SHRs and were significantly reduced by gallic acid administration. Gallic acid reduced cleaved caspase‐3 protein as well as bax, p53 and p300 mRNA levels in SHRs. CaMKII δ overexpression induced bax and p53 expression, which was attenuated by gallic acid treatment in H9c2 cells. Gallic acid treatment reduced DNA fragmentation and the TUNEL positive cells induced by angiotensin II. Taken together, gallic acid could be a novel therapeutic for the treatment of hypertension through suppression of CaMKII δ‐induced apoptosis.
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Affiliation(s)
- Li Jin
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea.,Jilin Hospital Affiliated with Jilin University, Chuanying, Jilin, China
| | - Zhe Hao Piao
- The Second Hospital of Jilin University, Nanguan, Changchun, China
| | - Chun Ping Liu
- Jilin Hospital Affiliated with Jilin University, Chuanying, Jilin, China
| | - Simei Sun
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Bin Liu
- The Second Hospital of Jilin University, Nanguan, Changchun, China
| | - Gwi Ran Kim
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Sin Young Choi
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Yuhee Ryu
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Hae Jin Kee
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
| | - Myung Ho Jeong
- Heart Research Center of Chonnam National University Hospital, Gwangju, Korea
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Rajtik T, Goncalvesova E, Varga ZV, Leszek P, Kusmierczyk M, Hulman M, Kyselovic J, Ferdinandy P, Adameova A. Posttranslational modifications of calcium/calmodulin-dependent protein kinase IIδ and its downstream signaling in human failing hearts. Am J Transl Res 2017; 9:3573-3585. [PMID: 28861149 PMCID: PMC5575172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 07/16/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND In human failing hearts (HF) of different origin (coronary artery disease-CAD, dilated-DCM, restrictive and hypertrophic cardiomyopathy-OTHER), we investigated the active forms of Ca2+/calmodulin-dependent protein kinase IIδ (p-Thr287-CaMKIIδ, oxMet281/282-CaMKIIδ) and their role in phenotypes of the disease. METHODS AND RESULTS Although basic diagnostic and clinical markers indicating the attenuated cardiac contractility and remodeling were comparable in HF groups, CaMKIIδ-mediated axis was different. P-Thr287-CaMKIIδ was unaltered in CAD group, whereas it was upregulated in non-ischemic cardiomyopathic groups. No correlation between the upregulated p-Thr287-CaMKIIδ and QT interval prolongation was detected. Unlike in DCM, oxMet281/282-CaMKIIδ did not differ among HF groups. Independently of CaMKIIδ phosphorylation/oxidation, activation of its downstreams-phospholamban and cardiac myosin binding protein-C was significantly downregulated supporting both diminished cardiac lusitropy and inotropy in all hearts. Content of sarcoplasmic reticulum Ca2+-ATPase 2a in all HF was unchanged. Protein phosphatase1β was upregulated in CAD and DCM only, while 2A did not differ among groups. CONCLUSION This is the first demonstration that the posttranslational activation of CaMKIIδ differs in HF depending on etiology. Lower levels of downstream molecular targets of CaMKIIδ do not correlate with either activation of CaMKIIδ or the expression of major protein phosphatases in the HF. Thus, it is unlikely that these mechanisms exclusively underlie failing of the heart.
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Affiliation(s)
- Tomas Rajtik
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Comenius UniversityBratislava, Slovak Republic
| | - Eva Goncalvesova
- Department of Heart Failure & Transplantation, The National Institute of Cardiovascular DiseasesBratislava, Slovak Republic
| | - Zoltan V Varga
- Department of Pharmacology & Pharmacotherapy, Semmelweis UniversityBudapest, Hungary
| | | | | | - Michal Hulman
- Clinic of Heart Surgery, The National Institute of Cardiovascular DiseasesBratislava, Slovak Republic
| | - Jan Kyselovic
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Comenius UniversityBratislava, Slovak Republic
| | - Peter Ferdinandy
- Department of Pharmacology & Pharmacotherapy, Semmelweis UniversityBudapest, Hungary
| | - Adriana Adameova
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Comenius UniversityBratislava, Slovak Republic
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Dai H, Jia G, Wang H, Yang J, Jiang H, Chu M. Epidermal growth factor receptor transactivation is involved in the induction of human hepatoma SMMC7721 cell proliferation by insufficient radiofrequency ablation. Oncol Lett 2017; 14:2463-2467. [PMID: 28789459 DOI: 10.3892/ol.2017.6463] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Accepted: 05/05/2017] [Indexed: 01/01/2023] Open
Abstract
Our previous study revealed that insufficient radiofrequency ablation (RFA) promotes the malignancy of human hepatocellular carcinoma (HCC) SMMC7721 cells via the Ca2+/calmodulin-dependent protein kinase II (CaMKII)/extracellular signal-regulated kinase (ERK)-induced overexpression of vascular endothelial growth factor (VEGF). The aims of the present study were to address the involvement of epidermal growth factor receptor (EGFR) transactivation in the enhanced SMMC7721 cell proliferation induced by insufficient RFA, in addition to its association with the CaMKII/ERK/VEGF signaling cascade. SMMC7721 cells were subjected to a 47°C treatment regimen to simulate insufficient RFA. Cell proliferation was determined using MTT and colony formation assays. The expression levels of VEGF, CaMKII, phosphorylated (phospho)-CaMKII, ERK, phospho-ERK, EGFR and phospho-EGFR were analyzed using western blotting. The results demonstrated that the enhancement of SMMC7721 cell proliferation by the 47°C treatment regimen was significantly inhibited by exposure of the cells to AG178 (a specific inhibitor of EGFR). Furthermore, AG1478 exposure prevented the overexpression of VEGF and phosphorylation of ERK, but had no significant effects on CaMKII phosphorylation. By contrast, 47°C treatment-induced EGFR phosphorylation was inhibited by treatment with KN93 (a specific inhibitor of CaMKII). Overall, the results of the present study have suggested a role for EGFR transactivation in the RFA-promoted growth of residual HCC. Thus, targeting EGFR may represent a useful preventive and therapeutic strategy for RFA-induced HCC progression and recurrence.
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Affiliation(s)
- Hongliang Dai
- Department of Community Health Nursing, School of Nursing, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Guizhi Jia
- Department of Physiology, College of Basic Medical Sciences, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Hongxin Wang
- Department of Pharmacology, College of Basic Medical Sciences, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Jingming Yang
- Department of Pharmacognosy, College of Pharmacy, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Hua Jiang
- Department of Pharmacognosy, College of Pharmacy, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Minghui Chu
- Department of Community Health Nursing, School of Nursing, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
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Yabuki Y, Takahata I, Matsuo K, Owada Y, Fukunaga K. Ramelteon Improves Post-traumatic Stress Disorder-Like Behaviors Exhibited by Fatty Acid-Binding Protein 3 Null Mice. Mol Neurobiol 2017; 55:3577-3591. [PMID: 28516430 DOI: 10.1007/s12035-017-0587-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 04/28/2017] [Indexed: 12/14/2022]
Abstract
We previously reported that fatty acid-binding protein 3 (FABP3) knockout (Fabp3 -/-) mice exhibit abnormal dopamine-related behaviors such as enhanced dopamine D2 receptor antagonist-induced catalepsy behaviors. Here, we report that Fabp3 null mice exhibit cognitive deficits, hyperlocomotion and impaired fear extinction, and thus show post-traumatic stress disorder (PTSD)-like behaviors. Notably, chronic administration of ramelteon (1.0 mg/kg, p.o.), a melatonin receptor agonist, improved all PTSD-like behaviors tested in Fabp3 -/- mice. Relevant to mechanisms underlying impaired fear extinction, we observed significantly reduced levels of Ca2+/calmodulin-dependent protein kinase II (CaMKII) autophosphorylation without changes in ERK phosphorylation in the anterior cingulate cortex (ACC). Inversely, CaMKII autophosphorylation increased in the basolateral amygdala (BLA) but remained relatively unchanged in hippocampus of Fabp3 -/- mice. Likewise, the number of c-Fos-positive neurons in BLA significantly increased after exposure to contextual fear conditions but remained unchanged in the central nucleus of the amygdala (CeA). Importantly, chronic ramelteon administration (1.0 mg/kg, p.o.) restored abnormal c-Fos expression and CaMKII autophosphorylation in the ACC and BLA of Fabp3 -/- mice. Finally, the melatonin receptor antagonist luzindole (2.5 mg/kg, i.p.) blocked ramelteon-dependent improvements. Taken together, Fabp3 -/- mice show PTSD-like behaviors, and ramelteon is a likely attractive candidate for PTSD therapy.
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Affiliation(s)
- Yasushi Yabuki
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki-Aoba Aoba-ku, Sendai, 980-8578, Japan
| | - Ibuki Takahata
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki-Aoba Aoba-ku, Sendai, 980-8578, Japan
| | - Kazuya Matsuo
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki-Aoba Aoba-ku, Sendai, 980-8578, Japan
| | - Yuji Owada
- Department of Organ Anatomy, Graduate School of Medicine, Tohoku University, Sendai, Japan
| | - Kohji Fukunaga
- Department of Pharmacology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki-Aoba Aoba-ku, Sendai, 980-8578, Japan.
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24
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Neef S, Heijman J, Otte K, Dewenter M, Saadatmand AR, Meyer-Roxlau S, Antos CL, Backs J, Dobrev D, Wagner M, Maier LS, El-Armouche A. Chronic loss of inhibitor-1 diminishes cardiac RyR2 phosphorylation despite exaggerated CaMKII activity. Naunyn Schmiedebergs Arch Pharmacol 2017; 390:857-862. [PMID: 28451724 DOI: 10.1007/s00210-017-1376-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 04/06/2017] [Indexed: 10/19/2022]
Abstract
Inhibitor-1 (I-1) modulates protein phosphatase 1 (PP1) activity and thereby counteracts the phosphorylation by kinases. I-1 is downregulated and deactivated in failing hearts, but whether its role is beneficial or detrimental remains controversial, and opposing therapeutic strategies have been proposed. Overactivity of Ca2+/calmodulin-dependent protein kinase II (CaMKII) with hyperphosphorylation of ryanodine receptors (RyR2) at the CaMKII-site is recognized to be central for heart failure and arrhythmias. Using an I-1-deficient mouse line as well as transfected cell lines, we investigated the effects of acute and chronic modulation of I-1 on CaMKII activity and RyR2 phosphorylation. We demonstrate that I-1 acutely modulates CaMKII by regulating PP1 activity. However, while ablation of I-1 should thus limit CaMKII-activation, we unexpectedly found exaggerated CaMKII-activation under β-adrenergic stress upon chronic loss of I-1 in knockout mice. We unraveled that this is due to chronic upregulation of the exchange protein activated by cAMP (EPAC) leading to augmented CaMKII activation, and using computational modeling validated that an increase in EPAC expression can indeed explain our experimental findings. Interestingly, at the level of RyR2, the increase in PP1 activity more than outweighed the increase in CaMKII activity, resulting in reduced RyR phosphorylation at Ser-2814. Exaggerated CaMKII activation due to counterregulatory mechanisms upon loss of I-1 is an important caveat with respect to suggested therapeutic I-1-inhibition, as CaMKII overactivity has been heavily implicated in several cardiac pathologies.
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Affiliation(s)
- Stefan Neef
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Jordi Heijman
- Department of Cardiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, The Netherlands
| | - Kristian Otte
- Department of Pharmacology and Toxicology, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Matthias Dewenter
- Department of Pharmacology and Toxicology, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Ali R Saadatmand
- Department of Pharmacology and Toxicology, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Stefanie Meyer-Roxlau
- Department of Pharmacology and Toxicology, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Christopher L Antos
- Department of Pharmacology and Toxicology, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Johannes Backs
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Dobromir Dobrev
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany
| | - Michael Wagner
- Department of Pharmacology and Toxicology, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Lars S Maier
- Department of Internal Medicine II, University Hospital Regensburg, Regensburg, Germany
| | - Ali El-Armouche
- Department of Pharmacology and Toxicology, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.
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Huang L, Jin Y, Feng S, Zou Y, Xu S, Qiu S, Li L, Zheng J. Role of Wnt/β-catenin, Wnt/c-Jun N-terminal kinase and Wnt/Ca 2+ pathways in cisplatin-induced chemoresistance in ovarian cancer. Exp Ther Med 2016; 12:3851-3858. [PMID: 28101169 PMCID: PMC5228322 DOI: 10.3892/etm.2016.3885] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Accepted: 05/18/2016] [Indexed: 12/17/2022] Open
Abstract
The aim of the present study was to explore the expression of Wnt signaling proteins β-catenin, c-Jun N-terminal kinase (JNK) and Ca2+/calmodulin-dependent protein kinase II (CaMKII) in ovarian cancer cells, and assess the correlation between this expression and cisplatin-induced chemoresistance. SKOV3 ovarian carcinoma cells and SKOV3/DDP (cisplatin resistant) cells were treated with cisplatin in the absence or presence of a Wnt signaling activator (CHIR-99021, glycogen synthase kinase 3β inhibitor) or inhibitor (XAV-939, tankyrase inhibitor). Following incubation for 48 h, cell viability, proliferation and cytotoxicity were measured using a sensitive colorimetric cell counting kit. Expression levels of β-catenin, JNK and CaMKII were detected by western blot and immunofluorescence staining. The results of the current study identified that β-catenin and JNK expression levels were significantly higher (P<0.01 and P<0.05 respectively), while CaMKII expression was lower (P>0.05), in SKOV3/DDP cells compared with SKOV3 cells. Moreover, following treatment with 20 µM cisplatin, reduced expression of β-catenin and JNK (P<0.05 and P<0.01 respectively), and increased expression of CaMKII (P<0.01), was observed in SKOV3 and SKOV3/DPP cell lines. Furthermore, inhibition of β-catenin signaling by XAV-939 effectively reversed cisplatin chemoresistance in SKOV3/DDP cells. Similarly, XAV-939 downregulated JNK expression (P<0.001), but upregulated CaMKII expression (P<0.001), in SKOV3/DDP cells. In conclusion, abnormal activation of Wnt/β-catenin and Wnt/JNK signaling pathways in ovarian cancer cells promotes cisplatin resistance, while the Wnt/Ca2+ signaling pathway reduces cisplatin resistance. This indicates that β-catenin, JNK and CaMKII are potential therapeutic targets in chemoresistant ovarian cancers.
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Affiliation(s)
- Lu Huang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Ye Jin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Shujun Feng
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Yuqing Zou
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Sainan Xu
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Shuang Qiu
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Ling Li
- Department of Computing, Brain Cognition Computing Lab, University of Kent, Kent CT2 7NZ, UK
| | - Jianhua Zheng
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
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Jhun BS, Mishra J, Monaco S, Fu D, Jiang W, Sheu SS, O-Uchi J. The mitochondrial Ca2+ uniporter: regulation by auxiliary subunits and signal transduction pathways. Am J Physiol Cell Physiol 2016; 311:C67-80. [PMID: 27122161 DOI: 10.1152/ajpcell.00319.2015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Mitochondrial Ca(2+) homeostasis, the Ca(2+) influx-efflux balance, is responsible for the control of numerous cellular functions, including energy metabolism, generation of reactive oxygen species, spatiotemporal dynamics of Ca(2+) signaling, and cell growth and death. Recent discovery of the molecular identity of the mitochondrial Ca(2+) uniporter (MCU) provides new possibilities for application of genetic approaches to study the mitochondrial Ca(2+) influx mechanism in various cell types and tissues. In addition, the subsequent discovery of various auxiliary subunits associated with MCU suggests that mitochondrial Ca(2+) uptake is not solely regulated by a single protein (MCU), but likely by a macromolecular protein complex, referred to as the MCU-protein complex (mtCUC). Moreover, recent reports have shown the potential role of MCU posttranslational modifications in the regulation of mitochondrial Ca(2+) uptake through mtCUC. These observations indicate that mtCUCs form a local signaling complex at the inner mitochondrial membrane that could significantly regulate mitochondrial Ca(2+) handling, as well as numerous mitochondrial and cellular functions. In this review we discuss the current literature on mitochondrial Ca(2+) uptake mechanisms, with a particular focus on the structure and function of mtCUC, as well as its regulation by signal transduction pathways, highlighting current controversies and discrepancies.
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Affiliation(s)
- Bong Sook Jhun
- Cardiovascular Research Center, Department of Medicine, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, Rhode Island; and
| | - Jyotsna Mishra
- Center for Translational Medicine, Department of Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Sarah Monaco
- Center for Translational Medicine, Department of Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Deming Fu
- Center for Translational Medicine, Department of Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Wenmin Jiang
- Center for Translational Medicine, Department of Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Shey-Shing Sheu
- Center for Translational Medicine, Department of Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Jin O-Uchi
- Cardiovascular Research Center, Department of Medicine, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, Rhode Island; and
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27
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Liu Z, Dai H, Jia G, Li Y, Liu X, Ren W. Insufficient radiofrequency ablation promotes human hepatoma SMMC7721 cell proliferation by stimulating vascular endothelial growth factor overexpression. Oncol Lett 2015; 9:1893-1896. [PMID: 25789063 PMCID: PMC4356410 DOI: 10.3892/ol.2015.2966] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 01/29/2015] [Indexed: 01/09/2023] Open
Abstract
The aims of the current study were to investigate the influence of insufficient radiofrequency ablation (RFA) on the cell proliferation of the human hepatocellular carcinoma (HCC) cells, SMMC7721, and to elucidate the underlying mechanism. SMMC7721 cells were subjected to a 47°C treatment regimen to simulate insufficient RFA, in the presence or absence of KN93 [a specific inhibitor of Ca2+/calmodulin-dependent protein kinase II (CaMKII)], PD98059 [a specific inhibitor of extracellular signal-regulated kinase (ERK)], or axitinib (a specific inhibitor of vascular endothelial growth factor (VEGF) receptor]. Cell proliferation was determined using a thiazolyl terazolium assay (MTT). The levels of CaMKII, phospho-CaMKII, ERK, phospho-ERK and VEGF were observed by western blot analysis. The results demonstrated that the 47°C treatment regimen: i) Triggered upregulation of VEGF expression in the SMMC7721 cells, which was reduced by CaMKII or ERK inhibition; ii) induced ERK activation was prevented by KN93; and iii) promoted SMMC7721 cell proliferation, which was greatly inhibited by axitinib, KN93 and PD98059. In conclusion, the results indicated that insufficient RFA promotes SMMC7721 cell proliferation by activating CaMKII/ERK-dependent VEGF overexpression.
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Affiliation(s)
- Zhining Liu
- Ultrasound Department, Shengjing Hospital, China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Hongliang Dai
- School of Nursing, Liaoning Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Guizhi Jia
- Department of Biochemistry and Molecular Biology, Liaoning Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Yuhong Li
- Ultrasound Department, First Affiliated Hospital, Liaoning Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Xin Liu
- Clinical Laboratory, First Affiliated Hospital, Liaoning Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Weidong Ren
- Ultrasound Department, Shengjing Hospital, China Medical University, Shenyang, Liaoning 110004, P.R. China
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Guo X, Yuan S, Liu Z, Fang Q. Oxidation- and CaMKII-mediated sarcoplasmic reticulum Ca(2+) leak triggers atrial fibrillation in aging. J Cardiovasc Electrophysiol 2014; 25:645-52. [PMID: 24576293 DOI: 10.1111/jce.12395] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 02/15/2014] [Accepted: 02/18/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Advanced age is a well-recognized predisposition to atrial fibrillation (AF). However, the cellular electrophysiological changes that underlie the heightened susceptibility to AF in aged individuals remain poorly understood. Sarcoplasmic reticulum (SR) Ca(2+) leak that results from posttranslational modification of type 2 ryanodine receptor channels (RyR2) has been implicated in arrhythmogenesis. We hypothesize that aging alters atrial myocytes Ca(2+) homeostasis and RyR2 function, which create a substrate for AF initiation. METHODS AND RESULTS We examined the susceptibility to AF in aged (24 months) and young adult (4-5 months) mice using an intraesophageal atrial electrical stimulation protocol. Aged mice showed significant higher AF induction rate (43.3%, n = 30) than young adults (8.8%, n = 34, P < 0.01). In accordance with these in vivo findings, significantly increased diastolic SR Ca(2+) leak and arrhythmogenic Ca(2+) activities with reduced SR Ca(2+) content were observed in aged atrial myocytes. Western blot showed RyR2 oxidation and phosphorylation at Ser2814 (Ca(2+) /calmodulin-dependent protein kinase II [CaMKII] site), but not phosphorylation at Ser2808 (protein kinase A [PKA] and CaMKII site), were increased in aged atrial myocytes. The selective CaMKII inhibitor (KN-93), as well as the antioxidant reagent (DTT) reversed the diastolic Ca(2+) leak and the frequency of spontaneous Ca(2+) transients in aged atrial myocytes, whereas PKA inhibition with H-89 was ineffective. CONCLUSIONS Aging increases both the oxidation and CaMKII-phosphorylation of RyR2, which result in diastolic SR Ca(2+) leak and facilitate AF initiation. These results contribute to the electrophysiological remodeling of aged atria and suggest a therapeutic strategy for AF treatment in aging.
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Affiliation(s)
- Xiaoxiao Guo
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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29
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Abstract
In this review we discuss the localization and function of the known subtypes of calcium/calmodulin dependent protein kinase IIδ (CaMKIIδ) and their role in cardiac physiology and pathophysiology. The CaMKII holoenzyme is comprised of multiple subunits that are encoded by four different genes called CaMKIIα, β, γ, and δ. While these four genes have a high degree of sequence homology, they are expressed in different tissues. CaMKIIα and β are expressed in neuronal tissue while γ and δ are present throughout the body, including in the heart. Both CaMKIIγ and δ are alternatively spliced in the heart to generate multiple subtypes. CaMKIIδ is the predominant cardiac isoform and is alternatively spliced in the heart to generate the CaMKIIδB subtype or the slightly less abundant δC subtype. The CaMKIIδB mRNA sequence contains a 33bp insert not present in δC that codes for an 11-amino acid nuclear localization sequence. This review focuses on the localization and function of the CaMKIIδ subtypes δB and δC and the role of these subtypes in arrhythmias, contractile dysfunction, gene transcription, and the regulation of Ca2+ handling.
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Affiliation(s)
- Charles B B Gray
- Department of Pharmacology, University of California at San Diego, San Diego CA, USA ; Biomedical Sciences Graduate Program, University of California at SanDiego, SanDiego CA, USA
| | - Joan Heller Brown
- Department of Pharmacology, University of California at San Diego, San Diego CA, USA
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30
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Kang JJ, Wei XY, Liu JP, Wong-Riley MTT, Ju G, Liu YY. Expression of phospho-Ca(2+) /calmodulin-dependent protein kinase II in the pre-Bötzinger complex of rats. J Neurochem 2013; 126:349-59. [PMID: 23651084 DOI: 10.1111/jnc.12297] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2012] [Accepted: 05/06/2013] [Indexed: 11/28/2022]
Abstract
The pre-Bötzinger complex (pre-BötC) in the ventrolateral medulla oblongata is a presumed kernel of respiratory rhythmogenesis. Ca(2+) -activated non-selective cationic current is an essential cellular mechanism for shaping inspiratory drive potentials. Ca(2+) /calmodulin-dependent protein kinase II (CaMKII), an ideal 'interpreter' of diverse Ca(2+) signals, is highly expressed in neurons in mediating various physiological processes. Yet, less is known about CaMKII activity in the pre-BötC. Using neurokinin-1 receptor as a marker of the pre-BötC, we examined phospho (P)-CaMKII subcellular distribution, and found that P-CaMKII was extensively expressed in the region. P-CaMKII-ir neurons were usually oval, fusiform, or pyramidal in shape. P-CaMKII immunoreactivity was distributed within somas and dendrites, and specifically in association with the post-synaptic density. In dendrites, most synapses (93.1%) examined with P-CaMKII expression were of asymmetric type, occasionally with symmetric type (6.9%), whereas in somas, 38.1% were of symmetric type. P-CaMKII asymmetric synaptic identification implicates that CaMKII may sense and monitor Ca(2+) activity, and phosphorylate post-synaptic proteins to modulate excitatory synaptic transmission, which may contribute to respiratory modulation and plasticity. In somas, CaMKII acts on both symmetric and asymmetric synapses, mediating excitatory and inhibitory synaptic transmission. P-CaMKII was also localized to the perisynaptic and extrasynaptic regions in the pre-BötC.
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Affiliation(s)
- Jun-Jun Kang
- Institute of Neurosciences, The Fourth Military Medical University, Xi'an, China
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Chocyk A, Bobula B, Dudys D, Przyborowska A, Majcher-Maślanka I, Hess G, Wędzony K. Early-life stress affects the structural and functional plasticity of the medial prefrontal cortex in adolescent rats. Eur J Neurosci 2013; 38:2089-107. [PMID: 23581639 DOI: 10.1111/ejn.12208] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 03/03/2013] [Indexed: 02/06/2023]
Abstract
Early life experiences are crucial factors that shape brain development and function due to their ability to induce structural and functional plasticity. Among these experiences, early-life stress (ELS) is known to interfere with brain development and maturation, increasing the risk of future psychopathologies, including depression, anxiety, and personality disorders. Moreover, ELS may contribute to the emergence of these psychopathologies during adolescence. In this present study, we investigated the effects of ELS, in the form of maternal separation (MS), on the structural and functional plasticity of the medial prefrontal cortex (mPFC) and anxiety-like behavior in adolescent male rats. We found that the MS procedure resulted in disturbances in mother-pup interactions that lasted until weaning and were most strongly demonstrated by increases in nursing behavior. Moreover, MS caused atrophy of the basal dendritic tree and reduced spine density on both the apical and basal dendrites in layer II/III pyramidal neurons of the mPFC. The structural changes were accompanied by an impairment of long-term potentiation processes and increased expression of key proteins, specifically glutamate receptor 1, glutamate receptor 2, postsynaptic density protein 95, αCa(2+) /calmodulin-dependent protein kinase II and αCa(2+)/calmodulin-dependent protein kinase II phosphorylated at residue Thr305, that are engaged in long-term potentiation induction and maintenance in the mPFC. We also found that the MS animals were more anxious in the light/dark exploration test. The results of this study indicate that ELS has a significant impact on the structural and functional plasticity of the mPFC in adolescents. ELS-induced adaptive plasticity may underlie the pathomechanisms of some early-onset psychopathologies observed in adolescents.
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Affiliation(s)
- Agnieszka Chocyk
- Laboratory of Pharmacology and Brain Biostructure, Institute of Pharmacology, Polish Academy of Sciences, Krakow, Poland.
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