1
|
Wang X, Wang W, Zhang R, Ma B, Ni L, Feng H, Liu C. Melatonin attenuates high glucose‑induced endothelial cell pyroptosis by activating the Nrf2 pathway to inhibit NLRP3 inflammasome activation. Mol Med Rep 2023; 27:71. [PMID: 36799176 PMCID: PMC9942260 DOI: 10.3892/mmr.2023.12958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/25/2023] [Indexed: 02/12/2023] Open
Abstract
Endothelial injury induced by hyperglycemia is the most critical initial step in the development of diabetic vasculopathy. The aim of this present study was to explore the prevention and treatment strategies and elucidate the specific mechanism of diabetes‑induced vascular endothelial injury. Melatonin, a hormone secreted by the pineal gland to regulate biological rhythm, serves an important role in maintaining human physiological function. Pyroptosis is a type of newly discovered inflammatory cell death. The current study first found by western blotting that melatonin could activate nuclear factor erythroid 2‑related factor 2 (Nrf2) pathway in human umbilical vein endothelial cells (HUVECs) under high glucose (HG) condition. Second, it found that pretreatment with Luzindole, a specific inhibitor of melatonin receptor (MT1/MT2), significantly reduced the activation of Nrf2 pathway by melatonin in HUVECs. It also found that pretreatment with melatonin or a specific NOD‑like receptor family, pyrin domain‑containing 3 (NLRP3) inhibitor (MCC950) pretreatment reduced HG‑induced endothelial cell pyroptosis. Finally, it was found that the protective effect of melatonin against reactive oxygen species/NLRP3 inflammasome pathway activation induced by HG in HUVECs was decreased after Nrf2 knockdown. In conclusion, the present study showed that melatonin may serve a protective role in HG‑induced vascular endothelial cell pyroptosis by activating the Nrf2 pathway to inhibit NLRP3 inflammasome activation. In addition, it was further found that melatonin attenuated HG‑induced vascular endothelial cell injury by interacting with its receptors (MT1/MT2) to promote activation of Nrf2 pathway.
Collapse
Affiliation(s)
- Xuebin Wang
- Department of Vascular Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P.R. China
| | - Wei Wang
- Department of Vascular Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P.R. China
| | - Rui Zhang
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Baitao Ma
- Department of Endovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450000, P.R. China
| | - Leng Ni
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China
| | - Hai Feng
- Department of Vascular Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P.R. China,Professor Hai Feng, Department of Vascular Surgery, Beijing Friendship Hospital, Capital Medical University, 95 Yong'an Road, Xicheng, Beijing 100050, P.R. China, E-mail:
| | - Changwei Liu
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China,Correspondence to: Professor Changwei Liu, Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Shuaifuyuan Hutong, Dongcheng, Beijing 100730, P.R. China, E-mail:
| |
Collapse
|
2
|
Cefotetan-bound human RKIP involves in Ras/Raf1/MEK/ERK signaling pathway. Acta Biochim Biophys Sin (Shanghai) 2022; 54:1917-1923. [PMID: 36789691 PMCID: PMC10157514 DOI: 10.3724/abbs.2022188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Cefotetan is widely used to treat bacterial infections in the clinic owing to its broad spectrum of antibacterial activity. In the present study, we demonstrate that cefotetan can bind to the conserved ligand-binding pocket of human Raf1 kinase inhibitory protein (hRKIP), which acts as a negative regulator of the Ras/Raf1/MEK/ERK signaling pathway. The cefotetan-bound hRKIP adopts a rigid structure with insufficient space for binding Raf1 kinase, thereby reliving the inhibitory activity of hRKIP in the Ras/Raf1/MEK/ERK signaling pathway and enhancing the phosphorylation level of ERK. Both NMR titration and molecular docking approaches show that several residues (P74, Y81, W84, P111, P112, K113, S142, G143, D144, W173, P178, Y181 and L184) play crucial roles in hRKIP binding cefotetan. NMR dynamics analysis reveals that the binding of cefotetan with hRKIP promotes ps-ns internal motion but reduces μs-ms conformational exchange for residues in the cefotetan-binding pocket of hRKIP. Our results not only disclose the structural basis of cefotetan upregulating the Ras/Raf1/MEK/ERK signaling pathway but also benefit developing novel drugs against diseases caused by the impaired Ras/Raf1/MEK/ERK pathway.
Collapse
|
3
|
Feng F, Jiao P, Wang J, Li Y, Bao B, Luoreng Z, Wang X. Role of Long Noncoding RNAs in the Regulation of Cellular Immune Response and Inflammatory Diseases. Cells 2022; 11:cells11223642. [PMID: 36429069 PMCID: PMC9688074 DOI: 10.3390/cells11223642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/12/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022] Open
Abstract
Long noncoding RNAs (lncRNAs) are recently discovered genetic regulatory molecules that regulate immune responses and are closely associated with the occurrence and development of various diseases, including inflammation, in humans and animals. Under specific physiological conditions, lncRNA expression varies at the cell or tissue level, and lncRNAs can bind to specific miRNAs, target mRNAs, and target proteins to participate in certain processes, such as cell differentiation and inflammatory responses, via the corresponding signaling pathways. This review article summarizes the regulatory role of lncRNAs in macrophage polarization, dendritic cell differentiation, T cell differentiation, and endothelial and epithelial inflammation. In addition, it describes the molecular mechanism of lncRNAs in acute kidney injury, hepatitis, inflammatory injury of the lung, osteoarthritis, mastitis, and neuroinflammation to provide a reference for the molecular regulatory network as well as the genetic diagnosis and treatment of inflammatory diseases in humans and animals.
Collapse
Affiliation(s)
- Fen Feng
- School of Agriculture, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, Yinchuan 750021, China
| | - Peng Jiao
- School of Agriculture, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, Yinchuan 750021, China
| | - Jinpeng Wang
- School of Agriculture, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, Yinchuan 750021, China
| | - Yanxia Li
- School of Agriculture, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, Yinchuan 750021, China
| | - Binwu Bao
- School of Agriculture, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, Yinchuan 750021, China
| | - Zhuoma Luoreng
- School of Agriculture, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, Yinchuan 750021, China
- Correspondence: (Z.L.); (X.W.)
| | - Xingping Wang
- School of Agriculture, Ningxia University, Yinchuan 750021, China
- Key Laboratory of Ruminant Molecular Cell Breeding, Ningxia Hui Autonomous Region, Yinchuan 750021, China
- Correspondence: (Z.L.); (X.W.)
| |
Collapse
|
4
|
Tobeiha M, Jafari A, Fadaei S, Mirazimi SMA, Dashti F, Amiri A, Khan H, Asemi Z, Reiter RJ, Hamblin MR, Mirzaei H. Evidence for the Benefits of Melatonin in Cardiovascular Disease. Front Cardiovasc Med 2022; 9:888319. [PMID: 35795371 PMCID: PMC9251346 DOI: 10.3389/fcvm.2022.888319] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 05/10/2022] [Indexed: 12/13/2022] Open
Abstract
The pineal gland is a neuroendocrine gland which produces melatonin, a neuroendocrine hormone with critical physiological roles in the circadian rhythm and sleep-wake cycle. Melatonin has been shown to possess anti-oxidant activity and neuroprotective properties. Numerous studies have shown that melatonin has significant functions in cardiovascular disease, and may have anti-aging properties. The ability of melatonin to decrease primary hypertension needs to be more extensively evaluated. Melatonin has shown significant benefits in reducing cardiac pathology, and preventing the death of cardiac muscle in response to ischemia-reperfusion in rodent species. Moreover, melatonin may also prevent the hypertrophy of the heart muscle under some circumstances, which in turn would lessen the development of heart failure. Several currently used conventional drugs show cardiotoxicity as an adverse effect. Recent rodent studies have shown that melatonin acts as an anti-oxidant and is effective in suppressing heart damage mediated by pharmacologic drugs. Therefore, melatonin has been shown to have cardioprotective activity in multiple animal and human studies. Herein, we summarize the most established benefits of melatonin in the cardiovascular system with a focus on the molecular mechanisms of action.
Collapse
Affiliation(s)
- Mohammad Tobeiha
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Ameneh Jafari
- Advanced Therapy Medicinal Product (ATMP) Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
- Proteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Fadaei
- Department of Internal Medicine and Endocrinology, Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Mohammad Ali Mirazimi
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Fatemeh Dashti
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Atefeh Amiri
- Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan, Pakistan
| | - Zatollah Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Russel J. Reiter
- Department of Cell Systems and Anatomy, UT Health. Long School of Medicine, San Antonio, TX, United States
| | - Michael R. Hamblin
- Laser Research Centre, Faculty of Health Science, University of Johannesburg, Johannesburg, South Africa
| | - Hamed Mirzaei
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| |
Collapse
|
5
|
Role of the Antioxidant Activity of Melatonin in Myocardial Ischemia-Reperfusion Injury. Antioxidants (Basel) 2022; 11:antiox11040627. [PMID: 35453312 PMCID: PMC9032762 DOI: 10.3390/antiox11040627] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 02/17/2022] [Accepted: 02/24/2022] [Indexed: 12/01/2022] Open
Abstract
Ischemia-reperfusion injury is a common problem in the age of interventional cardiology; it is primarily mediated by oxidative stress and reactive agents. Melatonin has antioxidative properties that make its use promising for treating ischemia-reperfusion injury. Multiple experimental studies in murine and porcine models have been performed with good results. Clinical trials have also been conducted but given their heterogeneity, no conclusive results can be made. Melatonin pharmacokinetic properties are not ideal; therefore, many analogs have been proposed with improved characteristics, and some studies have evaluated their efficacy in animal models, but clinical trials are needed to recommend their use. In this review, we expose the results of the most impactful studies regarding melatonin use in ischemia-reperfusion injury.
Collapse
|
6
|
Liu J, Sun Q, Sun M, Lin L, Ren X, Li T, Xu Q, Sun Z, Duan J. Melatonin alleviates PM 2.5-triggered macrophage M1 polarization and atherosclerosis via regulating NOX2-mediated oxidative stress homeostasis. Free Radic Biol Med 2022; 181:166-179. [PMID: 35149217 DOI: 10.1016/j.freeradbiomed.2022.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 02/06/2022] [Accepted: 02/07/2022] [Indexed: 12/20/2022]
Abstract
It is reported that oxidative stress homeostasis was involved in PM2.5-induced foam cell formation and progression of atherosclerosis, but the exact molecular mechanism is still unclear. Melatonin is an effective antioxidant that could reverse the cardiopulmonary injury. The main purpose of this study is to investigate the latent mechanism of PM2.5-triggered atherosclerosis development and the protective role of melatonin administration. Vascular Doppler ultrasound showed that PM2.5 exposure reduced aortic elasticity in ApoE-/- mice. Meanwhile, blood biochemical and pathological analysis demonstrated that PM2.5 exposure caused dyslipidemia, elicited oxidative damage of aorta and was accompanied by an increase in atherosclerotic plaque area; while the melatonin administration could effectively alleviate PM2.5-induced macrophage M1 polarization and atherosclerosis in mice. Further investigation verified that NADPH oxidase 2 (NOX2) and mitochondria are two prominent sources of PM2.5-induced ROS production in vascular macrophages. Whereas, the combined use of two ROS-specific inhibitors and adopted with melatonin markedly rescued PM2.5-triggered macrophage M1 polarization and foam cell formation by inhibiting NOX2-mediated crosstalk of Keap1/Nrf2/NF-κB and TLR4/TRAF6/NF-κB signaling pathways. Our results demonstrated that NOX2-mediated oxidative stress homeostasis is critical for PM2.5-induced atherosclerosis and melatonin might be a potential treatment for air pollution-related cardiovascular diseases.
Collapse
Affiliation(s)
- Jiangyan Liu
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, PR China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, PR China
| | - Qinglin Sun
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, PR China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, PR China
| | - Mengqi Sun
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, PR China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, PR China
| | - Lisen Lin
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, PR China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, PR China
| | - Xiaoke Ren
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, PR China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, PR China
| | - Tianyu Li
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, PR China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, PR China
| | - Qing Xu
- Core Facilities for Electrophysiology, Core Facilities Center, Capital Medical University, Beijing, 100069, PR China
| | - Zhiwei Sun
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, PR China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, PR China
| | - Junchao Duan
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, PR China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, PR China.
| |
Collapse
|
7
|
Drapkina OM, Kontsevaya AV, Budnevsky AV, Ovsyannikov ES, Drobysheva ES, Bolotskih VI, Makeeva AV, Lushchik MV. Melatonin and cardiovascular disease: from mechanisms of action to potential clinical use (literature review). КАРДИОВАСКУЛЯРНАЯ ТЕРАПИЯ И ПРОФИЛАКТИКА 2022. [DOI: 10.15829/1728-8800-2021-2892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Cardiovascular disease remains the most relevant public health problem. Most cardiovascular diseases are associated with an atherosclerosis, the development of which is associated with inflammation and endothelial dysfunction. Melatonin is a neurohormone that is synthesized mainly in the pineal gland and plays a central role in the regulation of sleep and some other body cyclic processes. For a long time, melatonin was perceived as a substance that is effective in the treatment of circadian cycle impairments. At the same time, a large number of studies have accumulated recently that demonstrate a wider range of its biological effects, including anti-inflammatory, antioxidant, antihypertensive and, possibly, hypolipidemic. The review includes current data from experimental and clinical studies demonstrating the cardioprotective effects of melatonin in atherosclerosis, myocardial ischemia, and heart failure.
Collapse
Affiliation(s)
- O. M. Drapkina
- National Medical Research Center for Therapy and Preventive Medicine
| | - A. V. Kontsevaya
- National Medical Research Center for Therapy and Preventive Medicine
| | | | | | | | | | | | | |
Collapse
|
8
|
Zhu YC, Jin FH, Zhang MY, Qi F. Inhibition of Peripheral ERK Signaling Ameliorates Persistent Muscle Pain Around Trigger Points in Rats. Cell Transplant 2021; 29:963689720960190. [PMID: 33081508 PMCID: PMC7784566 DOI: 10.1177/0963689720960190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The purpose of this study was to investigate whether the ERK signaling pathway was involved in ameliorating chronic myofascial hyperalgesia from contused gastrocnemius muscle in rats. We established an animal model associated with myofascial pain syndrome and described the mechanism of muscle pain in an animal model. Changes in the mechanical pain threshold were observed 0.5, 1, 2, 3, 4, 5, 8, 12, 18, and 24 h after ERK inhibitor injection around myofascial trigger points (MTrPs) of the gastrocnemius muscle in rats. Morphological changes in gastrocnemius muscle cells were observed by hematoxylin and eosin (H&E) staining. ERK signaling pathway activation was detected through immunohistochemistry and Western blotting. The main morphological characteristics of injured muscle fibers around MTrPs include gathered circular or elliptical shapes of different sizes in the cross-section and continuous inflated and tapering fibers in the longitudinal section. After intramuscular injection of U0126 (ERK inhibitor), the mechanical pain threshold significantly increased. The reduction in mechanical hyperalgesia was accompanied by reduced ERK protein phosphorylation, myosin light chain kinase (MLCK) protein, p-MLC protein expression, and the cross-sectional area of skeletal muscle cells around MTrPs. An ERK inhibitor contributed to the attenuation of mechanical hyperalgesia in the rat myofascial pain model, and the increase in pain threshold may be related to MLCK downregulation and other related contraction-associated proteins by ERK.
Collapse
Affiliation(s)
- Yu-Chang Zhu
- Department of Anaesthesiology and Pain Clinic, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.,Department of Anaesthesiology, Shangdong Provincial Maternal and Child Health Care Hospital, China
| | - Fei-Hong Jin
- Department of Anaesthesiology and Pain Clinic, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Ming-Yang Zhang
- Department of Anaesthesiology, Tengzhou Central People's Hospital, Tengzhou, Shandong, China
| | - Feng Qi
- Department of Anaesthesiology and Pain Clinic, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| |
Collapse
|
9
|
Suramin Targets the Conserved Ligand-Binding Pocket of Human Raf1 Kinase Inhibitory Protein. Molecules 2021; 26:molecules26041151. [PMID: 33670019 PMCID: PMC7926937 DOI: 10.3390/molecules26041151] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/14/2021] [Accepted: 02/19/2021] [Indexed: 12/23/2022] Open
Abstract
Suramin was initially used to treat African sleeping sickness and has been clinically tested to treat human cancers and HIV infection in the recent years. However, the therapeutic index is low with numerous clinical side-effects, attributed to its diverse interactions with multiple biological macromolecules. Here, we report a novel binding target of suramin, human Raf1 kinase inhibitory protein (hRKIP), which is an important regulatory protein involved in the Ras/Raf1/MEK/ERK (MAPK) signal pathway. Biolayer interference technology showed that suramin had an intermediate affinity for binding hRKIP with a dissociation constant of 23.8 µM. Both nuclear magnetic resonance technology and molecular docking analysis revealed that suramin bound to the conserved ligand-binding pocket of hRKIP, and that residues K113, W173, and Y181 play crucial roles in hRKIP binding suramin. Furthermore, suramin treatment at 160 µM could profoundly increase the ERK phosphorylation level by around 3 times. Our results indicate that suramin binds to hRKIP and prevents hRKIP from binding with hRaf1, thus promoting the MAPK pathway. This work is beneficial to both mechanistically understanding the side-effects of suramin and efficiently improving the clinical applications of suramin.
Collapse
|
10
|
Veiga ECDA, Simões RDS, Caviola LL, Abreu LC, Cavalli RC, Cipolla-Neto J, Baracat EC, Soares JM. Melatonin and the cardiovascular system in animals: systematic review and meta-analysis. Clinics (Sao Paulo) 2021; 76:e2863. [PMID: 34644731 PMCID: PMC8478132 DOI: 10.6061/clinics/2021/e2863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 08/16/2021] [Indexed: 12/09/2022] Open
Abstract
Melatonin, a hormone released by the pineal gland, demonstrates several effects on the cardiovascular system. Herein, we performed a systematic review and meta-analysis to verify the effects of melatonin in an experimental model of myocardial infarction. We performed a systematic review according to PRISMA recommendations and reviewed MEDLINE, Embase, and Cochrane databases. Only articles in English were considered. A systematic review of the literature published between November 2008 and June 2019 was performed. The meta-analysis was conducted using the RevMan 5.3 program provided by the Cochrane Collaboration. In total, 858 articles were identified, of which 13 were included in this review. The main results of this study revealed that melatonin benefits the cardiovascular system by reducing infarct size, improving cardiac function according to echocardiographic and hemodynamic analyses, affords antioxidant effects, improves the rate of apoptosis, decreases lactate dehydrogenase activity, enhances biometric analyses, and improves protein levels, as analyzed by western blotting and quantitative PCR. In the meta-analysis, we observed a statistically significant decrease in infarct size (mean difference [MD], -20.37 [-23.56, -17.18]), no statistical difference in systolic pressure (MD, -1.75 [-5.47, 1.97]), a statistically significant decrease in lactate dehydrogenase in animals in the melatonin group (MD, -4.61 [-6.83, -2.40]), and a statistically significant improvement in the cardiac ejection fraction (MD, -8.12 [-9.56, -6.69]). On analyzing potential bias, we observed that most studies presented a low risk of bias; two parameters were not included in the analysis, and one parameter had a high risk of bias. Melatonin exerts several effects on the cardiovascular system and could be a useful therapeutic target to combat various cardiovascular diseases.
Collapse
Affiliation(s)
- Eduardo Carvalho de Arruda Veiga
- Departamento de Obstetricia e Ginecologia, Hospital das Clinicas HCFMRP-USP, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
- Corresponding author. E-mail:
| | - Ricardo dos Santos Simões
- Departamento de Obstetricia e Ginecologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Leonardo L. Caviola
- Departamento de Obstetricia e Ginecologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Luiz Carlos Abreu
- Disciplina de escrita cientifica, Faculdade de Medicina do ABC, Santo Andre, SP, BR
| | - Ricardo Carvalho Cavalli
- Departamento de Obstetricia e Ginecologia, Hospital das Clinicas HCFMRP-USP, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, BR
| | - José Cipolla-Neto
- Departamento de Fisiologia e Biofisica, Instituto de Ciencias Biomedicas (ICB-USP), Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Edmund Chada Baracat
- Departamento de Obstetricia e Ginecologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - José Maria Soares
- Departamento de Obstetricia e Ginecologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| |
Collapse
|
11
|
Ferlazzo N, Andolina G, Cannata A, Costanzo MG, Rizzo V, Currò M, Ientile R, Caccamo D. Is Melatonin the Cornucopia of the 21st Century? Antioxidants (Basel) 2020; 9:antiox9111088. [PMID: 33167396 PMCID: PMC7694322 DOI: 10.3390/antiox9111088] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/26/2020] [Accepted: 11/03/2020] [Indexed: 12/12/2022] Open
Abstract
Melatonin, an indoleamine hormone produced and secreted at night by pinealocytes and extra-pineal cells, plays an important role in timing circadian rhythms (24-h internal clock) and regulating the sleep/wake cycle in humans. However, in recent years melatonin has gained much attention mainly because of its demonstrated powerful lipophilic antioxidant and free radical scavenging action. Melatonin has been proven to be twice as active as vitamin E, believed to be the most effective lipophilic antioxidant. Melatonin-induced signal transduction through melatonin receptors promotes the expression of antioxidant enzymes as well as inflammation-related genes. Melatonin also exerts an immunomodulatory action through the stimulation of high-affinity receptors expressed in immunocompetent cells. Here, we reviewed the efficacy, safety and side effects of melatonin supplementation in treating oxidative stress- and/or inflammation-related disorders, such as obesity, cardiovascular diseases, immune disorders, infectious diseases, cancer, neurodegenerative diseases, as well as osteoporosis and infertility.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Daniela Caccamo
- Correspondence: ; Tel.: +39-090-221-3386 or +39-090-221-3389
| |
Collapse
|
12
|
Clinical Application of Melatonin in the Treatment of Cardiovascular Diseases: Current Evidence and New Insights into the Cardioprotective and Cardiotherapeutic Properties. Cardiovasc Drugs Ther 2020; 36:131-155. [PMID: 32926271 DOI: 10.1007/s10557-020-07052-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/04/2020] [Indexed: 12/17/2022]
Abstract
Cardiovascular diseases (CVDs) are the leading global cause of mortality and disability, tending to happen in younger individuals in developed countries. Despite improvements in medical treatments, the therapy and long-term prognosis of CVDs such as myocardial ischemia-reperfusion, atherosclerosis, heart failure, cardiac hypertrophy and remodeling, cardiomyopathy, coronary artery disease, myocardial infarction, and other CVDs threatening human life are not satisfactory enough. Therefore, many researchers are attempting to identify novel potential therapeutic methods for the treatment of CVDs. Melatonin is an anti-inflammatory and antioxidant agent with a wide range of therapeutic properties. Recently, several investigations have been carried out to evaluate its effectiveness and efficiency in CVDs therapy, focusing on mechanistic pathways. Herein, this review aims to summarize current findings of melatonin treatment for CVDs.
Collapse
|
13
|
Myosin light chain kinase inhibitor ML7 improves vascular endothelial dysfunction and permeability via the mitogen-activated protein kinase pathway in a rabbit model of atherosclerosis. Biomed Pharmacother 2020; 128:110258. [PMID: 32516749 DOI: 10.1016/j.biopha.2020.110258] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/04/2020] [Accepted: 05/10/2020] [Indexed: 11/22/2022] Open
Abstract
Endothelial dysfunction (ED) and hyperpermeability are considered as the initiating steps in early atherosclerosis. Phosphorylation of myosin light chain (MLC) is key to cause vascular hyperpermeability via endothelial cell contraction. However, it is unclear whether MLC phosphorylation can also regulate the balance between contraction and relaxation of endothelial cells, thereby affecting endothelium-dependent diastolic function and leading to ED. The present study investigated relationships between ED and MLC phosphorylation and underlying mechanisms. Twenty-four male New Zealand white rabbits were randomly divided into three groups: control, AS, and ML7 (MLCK inhibitor) groups, and fed with normal diet, high-fat diet (HFD), and HFD plus oral ML7 (1 mg/kg daily) respectively. HFD-fed rabbits showed typical atheromatous lesions and endothelial hyperpermeability, and these lesions could be partly reversed following ML7 therapy. Western blotting revealed significant increased expression of myosin light chain kinase (MLCK) and phosphorylation of MLC, JNK, and ERK in the arterial wall of rabbits in the AS group compared with those of the control group (p < 0.05), whereas the ML7 group showed markedly decreased levels of these proteins compared with the AS group (p < 0.05). The endothelium-dependent relaxation rate was significantly reduced both in vitro and in vivo in AS group, and was improved using ML7 therapy. Taken together, these results indicate that MLCK expression and subsequent MLC phosphorylation increase vascular endothelial permeability and endothelium-dependent diastolic dysfunction by promoting endothelial cell contraction, which may be initiated by the activation of the MAP/ERK (MEK) and MAP/JNK (MEK) pathways.
Collapse
|
14
|
Chen M, Cecon E, Karamitri A, Gao W, Gerbier R, Ahmad R, Jockers R. Melatonin MT 1 and MT 2 receptor ERK signaling is differentially dependent on G i/o and G q/11 proteins. J Pineal Res 2020; 68:e12641. [PMID: 32080899 DOI: 10.1111/jpi.12641] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/15/2020] [Accepted: 02/17/2020] [Indexed: 12/14/2022]
Abstract
G protein-coupled receptors (GPCRs) transmit extracellular signals into cells by activating G protein- and β-arrestin-dependent pathways. Extracellular signal-regulated kinases (ERKs) play a central role in integrating these different linear inputs coming from a variety of GPCRs to regulate cellular functions. Here, we investigated human melatonin MT1 and MT2 receptors signaling through the ERK1/2 cascade by employing different biochemical techniques together with pharmacological inhibitors and siRNA molecules. We show that ERK1/2 activation by both receptors is exclusively G protein-dependent, without any participation of β-arrestin1/2 in HEK293 cells. ERK1/2 activation by MT1 is only mediated though Gi/o proteins, while MT2 is dependent on the cooperative activation of Gi/o and Gq/11 proteins. In the absence of Gq/11 proteins, however, MT2 -induced ERK1/2 activation switches to a β-arrestin1/2-dependent mode. The signaling cascade downstream of G proteins is the same for both receptors and involves activation of the PI3K/PKCζ/c-Raf/MEK/ERK cascade. The differential G protein dependency of MT1 - and MT2 -mediated ERK activation was confirmed at the level of EGR1 and FOS gene expression, two ERK1/2 target genes. Gi/o /Gq/11 cooperativity was also observed in Neuroscreen-1 cells expressing endogenous MT2 , whereas in the mouse retina, where MT2 is engaged into MT1 /MT2 heterodimers, ERK1/2 signaling is exclusively Gi/o -dependent. Collectively, our data reveal differential signaling modes of MT1 and MT2 in terms of ERK1/2 activation, with an unexpected Gi/o /Gq/11 cooperativity exclusively for MT2 . The plasticity of ERK activation by MT2 is highlighted by the switch to a β-arrestin1/2-dependent mode in the absence of Gq/11 proteins and by the switch to a Gi/o mode when engaged into MT1 /MT2 heterodimers, revealing a new mechanism underlying tissue-specific responses to melatonin.
Collapse
Affiliation(s)
- Min Chen
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Erika Cecon
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | | | - Wenwen Gao
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Romain Gerbier
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Raise Ahmad
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| | - Ralf Jockers
- Institut Cochin, CNRS, INSERM, Université de Paris, Paris, France
| |
Collapse
|
15
|
Lee S, Byun JK, Park M, Woo Kim S, Lee S, Kim JG, Lee IK, Choi YK, Park KG. Melatonin inhibits vascular smooth muscle cell proliferation and apoptosis through upregulation of Sestrin2. Exp Ther Med 2020; 19:3454-3460. [PMID: 32373191 PMCID: PMC7197251 DOI: 10.3892/etm.2020.8638] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 12/10/2019] [Indexed: 12/12/2022] Open
Abstract
Excessive vascular smooth muscle cell (VSMC) proliferation contributes to the development of atherosclerosis and restenosis. Furthermore, apoptosis of VSMCs accelerates plaque rupture in the atherosclerotic vessels. Therefore, a strategy that regulates both VSMC proliferation and apoptosis is essential for the development of novel pharmacological tools for the treatment of atherosclerosis. Despite mounting evidence supporting the benefits of melatonin in diverse metabolic diseases, the role of melatonin in VSMC growth remains largely unknown. The present study revealed that melatonin inhibited both proliferation and apoptosis of primary cultured rat VSMCs. Melatonin induced mitochondrial energetic stress in VSMCs and subsequent induction of Sestrin2 via C/EBPβ. Melatonin-induced Sestrin2 suppressed mTORC1 activity in VSMCs, contributing to suppression of VSMC proliferation. Additionally, melatonin-induced upregulation of Sestrin2 blocked apoptosis by preventing excessive ROS generation. The results demonstrated that melatonin controlled VSMC proliferation and apoptosis via Sestrin2-mediated inhibition of mTORC1 and ROS scavenging. Therefore, melatonin should be considered as a lead compound for therapies aimed at preventing vessel lumen constriction during the course of atherosclerosis and restenosis.
Collapse
Affiliation(s)
- Seunghyeong Lee
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41566, Republic of Korea.,BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jun-Kyu Byun
- Research Institute of Aging and Metabolism, Kyungpook National University, Daegu 41566, Republic of Korea.,Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Republic of Korea
| | - Mihyang Park
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41566, Republic of Korea.,BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sung Woo Kim
- Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu 42472, Republic of Korea
| | - Sungwoo Lee
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Republic of Korea
| | - Jung-Guk Kim
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Republic of Korea
| | - In-Kyu Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Republic of Korea
| | - Yeon-Kyung Choi
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Republic of Korea
| | - Keun-Gyu Park
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41566, Republic of Korea.,Research Institute of Aging and Metabolism, Kyungpook National University, Daegu 41566, Republic of Korea.,Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, Republic of Korea
| |
Collapse
|
16
|
Hu ZP, Fang XL, Sheng B, Guo Y, Yu YQ. Melatonin inhibits macrophage infiltration and promotes plaque stabilization by upregulating anti-inflammatory HGF/c-Met system in the atherosclerotic rabbit: USPIO-enhanced MRI assessment. Vascul Pharmacol 2020; 127:106659. [DOI: 10.1016/j.vph.2020.106659] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 02/06/2020] [Accepted: 02/14/2020] [Indexed: 01/08/2023]
|
17
|
Effects of melatonin on cardiovascular risk factors and metabolic syndrome: a comprehensive review. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:521-536. [DOI: 10.1007/s00210-020-01822-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/10/2020] [Indexed: 12/13/2022]
|
18
|
Liu T, Jin L, Chen M, Zheng Z, Lu W, Fan W, Li L, Zheng F, Zhu Q, Qiu H, Liu J, Chen M, Tian C, Hu Z, Zhang C, Luo M, Li J, Kang T, Yang L, Li Y, Deng W. Ku80 promotes melanoma growth and regulates antitumor effect of melatonin by targeting HIF1-α dependent PDK-1 signaling pathway. Redox Biol 2019; 25:101197. [PMID: 31023624 PMCID: PMC6859552 DOI: 10.1016/j.redox.2019.101197] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 03/26/2019] [Accepted: 04/08/2019] [Indexed: 12/15/2022] Open
Abstract
Melanoma is one of the most malignant and aggressive cancers with high cancer-related deaths. However, it is unclear whether Ku80 regulates tumor growth in human melanoma. In this study, we screened a siRNA library targeting 6024 human genes and identified Ku80 as a potential therapeutic target in melanoma cells. Knockdown of Ku80 significantly suppressed melanoma cell proliferation and induced apoptosis, as well as enhanced the antitumor effect of melatonin in melanoma in vitro and in vivo. Overexpression of Ku80, however, promoted melanoma growth and increased the insensitivity of melanoma cells to melatonin. Mechanistically, we found that Ku80 bound to the PDK1 promoter and activated the transcription of PDK1. Moreover, we showed that the binding of Ku80 at the PDK-1 promoter was HIF1-α dependent, and melatonin degraded HIF1-α in melanoma cells. Furthermore, clinical data revealed that the expression of Ku80 and PDK-1 proteins were positively correlated and elevated in the tumor tissues of melanoma patients, and high expression of Ku80 predicted a poor prognosis in melanoma. Collectively, our study demonstrated that Ku80 promoted melanoma growth and regulated antitumor activity of melatonin by targeting HIF1-α dependent PDK-1 signaling pathway, suggesting that Ku80 may be a potential molecular target for melanoma treatment.
Collapse
Affiliation(s)
- Tianze Liu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China; The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Lizi Jin
- The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Miao Chen
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Zongheng Zheng
- The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wenjing Lu
- The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Wenhua Fan
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Liren Li
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Fufu Zheng
- The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Qiaohua Zhu
- Shunde Hospital, Southern Medical University, Foshan, China
| | - Huijuan Qiu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Jiani Liu
- The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Manyu Chen
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Chunfang Tian
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Zheng Hu
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Changlin Zhang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Meihua Luo
- Shunde Hospital, Southern Medical University, Foshan, China
| | - Jian Li
- The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China
| | - Tiebang Kang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Lukun Yang
- The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong, China.
| | - Yizhuo Li
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China.
| | - Wuguo Deng
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China.
| |
Collapse
|
19
|
Zhou H, Ma Q, Zhu P, Ren J, Reiter RJ, Chen Y. Protective role of melatonin in cardiac ischemia-reperfusion injury: From pathogenesis to targeted therapy. J Pineal Res 2018; 64. [PMID: 29363153 DOI: 10.1111/jpi.12471] [Citation(s) in RCA: 177] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 01/16/2018] [Indexed: 02/06/2023]
Abstract
Acute myocardial infarction (MI) is a major cause of mortality and disability worldwide. In patients with MI, the treatment option for reducing acute myocardial ischemic injury and limiting MI size is timely and effective myocardial reperfusion using either thombolytic therapy or primary percutaneous coronary intervention (PCI). However, the procedure of reperfusion itself induces cardiomyocyte death, known as myocardial reperfusion injury, for which there is still no effective therapy. Recent evidence has depicted a promising role of melatonin, which possesses powerful antioxidative and anti-inflammatory properties, in the prevention of ischemia-reperfusion (IR) injury and the protection against cardiomyocyte death. A number of reports explored the mechanism of action behind melatonin-induced beneficial effects against myocardial IR injury. In this review, we summarize the research progress related to IR injury and discuss the unique actions of melatonin as a protective agent. Furthermore, the possible mechanisms responsible for the myocardial benefits of melatonin against reperfusion injury are listed with the prospect of the use of melatonin in clinical application.
Collapse
Affiliation(s)
- Hao Zhou
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Qiang Ma
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Pingjun Zhu
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Jun Ren
- Department of Cardiology, Zhongshan Hospital Fudan University, Shanghai, China
| | - Russel J Reiter
- Department of Cellular and Structural Biology, UT Health San Antonio, San Antonio, TX, USA
| | - Yundai Chen
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| |
Collapse
|
20
|
Zhang Y, Liu X, Bai X, Lin Y, Li Z, Fu J, Li M, Zhao T, Yang H, Xu R, Li J, Ju J, Cai B, Xu C, Yang B. Melatonin prevents endothelial cell pyroptosis via regulation of long noncoding RNA MEG3/miR-223/NLRP3 axis. J Pineal Res 2018; 64. [PMID: 29024030 DOI: 10.1111/jpi.12449] [Citation(s) in RCA: 295] [Impact Index Per Article: 49.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 09/05/2017] [Indexed: 12/11/2022]
Abstract
Atherosclerosis (AS) is an inflammatory disease linked to endothelial dysfunction. Melatonin is reported to possess substantial anti-inflammatory properties, which has proven to be effective in AS. Emerging literature suggests that pyroptosis plays a critical role during AS progression. However, whether pyroptosis contributes to endothelial dysfunction and the underlying molecular mechanisms remained unexploited. This study was designed to investigate the antipyroptotic effects of melatonin in atherosclerotic endothelium and to elucidate the potential mechanisms. In this study, high-fat diet (HFD)-treated ApoE-/- mice were used as an atherosclerotic animal model. We found intragastric administration of melatonin for 12 weeks markedly reduced the atherosclerotic plaque in aorta. Meanwhile, melatonin also attenuated the expression of pyroptosis-related genes, including NLRP3, ASC, cleaved caspase1, NF-κB/GSDMD, GSDMD N-termini, IL-1β, and IL-18 in aortic endothelium of melatonin-treated animals. Consistent antipyroptotic effects were also observed in ox-LDL-treated human aortic endothelial cells (HAECs). We found that lncRNA MEG3 enhanced pyroptosis in HAECs. Moreover, MEG3 acted as an endogenous sponge by sequence complementarity to suppress the function of miR-223 and to increase NLRP3 expression and enhance endothelial cell pyroptosis. Furthermore, knockdown of miR-223 blocked the antipyroptotic actions of melatonin in ox-LDL-treated HAECs. Together, our results suggest that melatonin prevents endothelial cell pyroptosis via MEG3/miR-223/NLRP3 axis in atherosclerosis, and therefore, melatonin replacement might be considered a new strategy for protecting endothelium against pyroptosis, thereby for the treatment of atherosclerosis associated with pyroptosis.
Collapse
Affiliation(s)
- Yong Zhang
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
- Institute of Metabolic Disease, Heilongjiang Academy of Medical Science, Harbin, China
| | - Xin Liu
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Xue Bai
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yuan Lin
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Zhange Li
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jiangbo Fu
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Mingqi Li
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Tong Zhao
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Huan Yang
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Ranchen Xu
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jiamin Li
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Jin Ju
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Benzhi Cai
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Chaoqian Xu
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Baofeng Yang
- Department of Pharmacology (the State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
- Faculty of Medicine, Department of Pharmacology and Therapeutics, Melbourne School of Biomedical Sciences, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| |
Collapse
|
21
|
Xu HJ, Jiang WD, Feng L, Liu Y, Wu P, Jiang J, Kuang SY, Tang L, Tang WN, Zhang YA, Zhou XQ. Dietary vitamin C deficiency depressed the gill physical barriers and immune barriers referring to Nrf2, apoptosis, MLCK, NF-κB and TOR signaling in grass carp (Ctenopharyngodon idella) under infection of Flavobacterium columnare. FISH & SHELLFISH IMMUNOLOGY 2016; 58:177-192. [PMID: 27640333 DOI: 10.1016/j.fsi.2016.09.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 09/12/2016] [Accepted: 09/13/2016] [Indexed: 06/06/2023]
Abstract
This study explored the effects of vitamin C on the physical barriers and immune barriers, and relative mRNA levels of signaling molecules in the gill of grass carp (Ctenopharyngodon idella) under infection of Flavobacterium columnare. The results indicated that compared with optimal vitamin C supplementation, vitamin C deficiency (2.9 mg/kg diet) (1) increased reactive oxygen species, malondialdehyde and protein carbonyl (PC) contents (P < 0.05), decreased the copper/zinc superoxide dismutase, manganese superoxide dismutase, catalase, glutathione peroxidase and glutathione reductase activities and mRNA levels (P < 0.05), and glutathione and vitamin C contents (P < 0.05), down-regulated NF-E2-related factor 2 mRNA level (P < 0.05), and up-regulated Kelch-like ECH-associating protein (Keap) 1a (rather than Keap1b) mRNA level (P < 0.05) in the gill of grass carp under infection of F. columnare, suggesting that vitamin C deficiency induced oxidative injury in fish gill; (2) up-regulated caspase-3, -7, -8, -9, Fas ligand, B-cell lymphoma protein 2 associated X protein, apoptotic protease activating factor-1 mRNA levels (P < 0.05), and down-regulated inhibitor of apoptosis protein and B-cell lymphoma-2 (rather than myeloid cell leukemia-1) mRNA level (P < 0.05) in the gill of grass carp under infection of F. columnare, suggesting that vitamin C deficiency aggravated cell apoptosis in fish gill; (3) up-regulated pore-forming TJs Claudin-12, 15a, -15b, and related signaling molecules myosin light chain kinase, p38 mitogen-activated protein kinase (rather than c-Jun N-terminal kinases) mRNA levels (P < 0.05), and down-regulated barrier-forming TJs Occludin, zonula occludens (ZO) 1, ZO-2, Claudin-c, -3c, -7a, -7b mRNA levels (P < 0.05) in the gill of grass carp under infection of F. columnare, suggesting that vitamin C deficiency disrupted tight junctional complexes in fish gill; (4) decreased lysozyme and acid phosphatase (ACP) activities, and complement 3 (C3), C4 and IgM contents (P < 0.05), down-regulated the mRNA levels of antimicrobial peptides liver expressed antimicrobial peptide (LEAP) 2A, LEAP-2B, Hepcidin, β-defensin mRNA levels (P < 0.05) in the gill of grass carp under infection of F. columnare, suggesting that vitamin C deficiency decrease fish gill immune function; (5) down-regulated the mRNA levels of anti-inflammatory cytokines-related factors interleukin 10 (IL-10), IL-11, transforming growth factor (TGF) β1, TGF-β2, inhibitor of κBa and eIF4E-binding protein 1 (4E-BP1) (rather than 4E-BP2) (P < 0.05), and up-regulated pro-inflammatory cytokines-related factors interferon γ2, IL-1β, IL-6, IL-8, IL-12 P35, IL-12 P40, nuclear factor κB (NF-κB) p65 (rather than NF-κB p52), IκB kinases (IKK) (only IKKα and IKKγ), target of rapamycin and ribosomal protein S6 kinase 1 mRNA levels (P < 0.05) in the gill of grass carp under infection of F. columnare, suggesting that vitamin C deficiency aggravated fish gill inflammation. In conclusion, vitamin C deficiency disrupted physical barriers and immune barriers, and regulated relative mRNA levels of signaling molecules in fish gill. The vitamin C requirement for against gill rot morbidity of grass carp (264-1031 g) was estimated to be 156.0 mg/kg diet. In addition, based on the gill biochemical indices (antioxidant indices MDA, PC and vitamin C contents, and immune indices LA and ACP activity) the vitamin C requirements for grass carp (264-1031 g) were estimated to be 116.8, 156.6, 110.8, 57.8 and 134.9 mg/kg diet, respectively.
Collapse
Affiliation(s)
- Hui-Jun Xu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wei-Dan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, 611130, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jun Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, 611130, China
| | - Sheng-Yao Kuang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, 610066, China
| | - Ling Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, 610066, China
| | - Wu-Neng Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, 610066, China
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Xiao-Qiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, 611130, China.
| |
Collapse
|
22
|
Abstract
PURPOSE OF REVIEW Melatonin is a neuroendocrine hormone synthesized primarily by the pineal gland. Numerous studies have suggested that melatonin plays an important role in various cardiovascular diseases. In this article, recent progress regarding melatonin's effects on cardiovascular diseases is reviewed. RECENT FINDINGS In the past year, studies have focused on the mechanism of protection of melatonin on cardiovascular diseases, including myocardial ischemia-reperfusion injury, myocardial hypoxia-reoxygenation injury, pulmonary hypertension, hypertension, atherosclerosis, valvular heart diseases, and other cardiovascular diseases. SUMMARY Studies have demonstrated that melatonin has significant effects on ischemia-reperfusion injury, myocardial chronic intermittent hypoxia injury, pulmonary hypertension, hypertension, valvular heart diseases, vascular diseases, and lipid metabolism. As an inexpensive and well tolerated drug, melatonin may be a new therapeutic option for cardiovascular disease.
Collapse
Affiliation(s)
- Hang Sun
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Aaron M. Gusdon
- Department of Pathology, Division of Neuropathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Department of Neurology, Weill Cornell Medical College, New York, USA
| | - Shen Qu
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| |
Collapse
|
23
|
Zeng YY, Jiang WD, Liu Y, Wu P, Zhao J, Jiang J, Kuang SY, Tang L, Tang WN, Zhang YA, Zhou XQ, Feng L. Dietary alpha-linolenic acid/linoleic acid ratios modulate intestinal immunity, tight junctions, anti-oxidant status and mRNA levels of NF-κB p65, MLCK and Nrf2 in juvenile grass carp (Ctenopharyngodon idella). FISH & SHELLFISH IMMUNOLOGY 2016; 51:351-364. [PMID: 26615102 DOI: 10.1016/j.fsi.2015.11.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 11/16/2015] [Accepted: 11/18/2015] [Indexed: 06/05/2023]
Abstract
This study was conducted to investigate the effects of dietary alpha-linolenic acid/linoleic acid (ALA/LNA) ratios on the immune response, tight junctions, antioxidant status and immune-related signaling molecules mRNA levels in the intestine of juvenile grass carp (Ctenopharyngodon idella). A total of 1260 juvenile grass carp with an average initial weight of 8.78 ± 0.03 g were fed diets with different ALA/LNA ratios (0.01, 0.34, 0.68, 1.03, 1.41, 1.76 and 2.15) for 60 days. Results indicated that ALA/LNA ratio of 1.03 significantly increased acid phosphatase, lysozyme activities and complement C3 contents, promoted interleukin 10, transforming growth factor β1 and κB inhibitor α mRNA abundance, whereas suppressed pro-inflammatory cytokines (interleukin 1β, interleukin 8, tumor necrosis factor α and interferon γ2) and signal molecules (IκB kinase β, IκB kinase γ and nuclear factor κB p65) mRNA levels in the intestine (P < 0.05), suggesting that optimal dietary ALA/LNA ratio improved intestinal immune response of juvenile fish. Additionally, ALA/LNA ratio of 1.03 significantly promoted Claudin-3, Claudin-b, Claudin-c, Occludin and ZO-1 gene transcription, whereas reduced Claudin-15a and myosin light-chain kinase mRNA levels in the intestine, suggesting that appropriate dietary ALA/LNA ratio strengthened tight junctions in the intestine of juvenile fish. Meanwhile, ALA/LNA ratio of 1.03 noticeably elevated glutathione contents, copper/zinc superoxide dismutase, glutathione peroxidase, glutathione S-transferase and glutathione reductase activities and mRNA levels, as well as signaling molecule nuclear factor erythoid 2-related factor 2 gene transcriptional abundance in the intestine, suggesting that proper ratio of dietary ALA/LNA ameliorate the intestinal antioxidant status of juvenile fish. Based on the quadratic regression analysis of the complement C3 content in the distal intestine and malondialdehyde content in the whole intestine, optimal ALA/LNA ratio for maximum growth of juvenile grass carp (8.78-72.00 g) were estimated to be 1.13 and 1.12, respectively.
Collapse
Affiliation(s)
- Yun-Yun Zeng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Wei-Dan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Juan Zhao
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Jun Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Sheng-Yao Kuang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Ling Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Wu-Neng Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Xiao-Qiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China.
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China.
| |
Collapse
|
24
|
He JP, Tang GD, Qin MB, Shi HR, Fu HZ, Lin SD, Luo Q. Role of myosin light chain kinase in hypertriglyceridemia-associated acute pancreatitis in rats. Shijie Huaren Xiaohua Zazhi 2016; 24:19-27. [DOI: 10.11569/wcjd.v24.i1.19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the role of myosin light chain kinase (MLCK) in hypertriglyceridemia-associated acute pancreatitis (HTGP).
METHODS: Forty-eight male SD rats were randomly divided into two groups to be fed either a high-fat diet (group A) or a normal diet (group B). After being raised for 4 weeks, blood was harvested from the retroorbital venous plexus to measure serum triglyceride (TG) levels. After that, group A was randomly divided into three subgroups: HTG, HTG + AP, and HTG + AP + ML-7; group B were also randomly divided into three subgroups: C, AP, and AP + ML-7. All rats were sacrificed 24 h after the last injection of cerulein. The pancreases were carefully removed for HE staining and transmission electron microscopy to observe the morphological changes, ultrastructure and tight junction (TJ). Blood was obtained from the heart to measure serum amylase levels. The expression and localization of MLCK and p-JNK in the pancreas were assayed by immunohistochemistry.
RESULTS: Compared with group B, serum TG level was significantly increased in group A after being fed a high fat diet (P < 0.01). The pathologic score of the pancreas and serum amylase (AMY) activity were significantly elevated in the HTG + AP group, compared with the AP group (P < 0.05). The ultrastructure of the pancreas in the HTG + AP and AP groups was damaged and the TJ was broadened (most significant in the HTG + AP group). Besides, MLCK and p-JNK were significantly up-regulated in the HTG + AP group compared with those in the AP group (P < 0.05), and there was a positive correlation between the expression of MLCK and p-JNK in the pancreas and the pathologic score of the pancreas (r1 = 0.795, r2 = 0.789, P < 0.01). ML-7, an inhibitor of MLCK, significantly ameliorated the pathologic signs of the pancreas, down-regulated AMY level (P < 0.01), improved the TJ and decreased the expression of p-JNK (P < 0.05).
CONCLUSION: MLCK may be associated with the severity of HTGP, and involved in the formation of HTGP by broadening cell-cell TJ and activation of the JNK pathway.
Collapse
|
25
|
Cheng X, Wang X, Wan Y, Zhou Q, Zhu H, Wang Y. Myosin light chain kinase inhibitor ML7 improves vascular endothelial dysfunction via tight junction regulation in a rabbit model of atherosclerosis. Mol Med Rep 2015; 12:4109-4116. [PMID: 26096176 PMCID: PMC4526030 DOI: 10.3892/mmr.2015.3973] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 05/08/2015] [Indexed: 01/06/2023] Open
Abstract
Vascular endothelial dysfunction (VED) is an important factor in the initiation and development of atherosclerosis (AS). Previous studies have demonstrated that endothelial permeability is increased in diet‑induced AS. However, the precise underlying mechanisms remain poorly understood. The present study aimed to analyze whether the myosin light chain kinase (MLCK) inhibitor ML7 is able to improve VED and AS by regulating the expression of the tight junction (TJ) proteins zona occludens (ZO)‑1 and occludin via mechanisms involving MLCK and MLC phosphorylation in high‑fat diet‑fed rabbits. New Zealand white rabbits were randomly divided into three groups: Control group, AS group and ML7 group. The rabbits were fed a standard diet (control group), a high‑fat diet (AS group) or a high‑fat diet supplemented with 1 mg/kg/day ML7 (ML7 group). After 12 weeks, endothelium‑dependent relaxation and endothelium‑independent relaxation were measured using high-frequency ultrasound. Administration of a high‑fat diet significantly increased the levels of serum lipids and inflammatory markers in the rabbits in the AS group, as compared with those in the rabbits in the control group. Furthermore, a high‑fat diet contributed to the formation of a typical atherosclerotic plaque, as well as an increase in endothelial permeability and VED. These symptoms of AS were significantly improved following treatment with ML7, as demonstrated in the ML7 group. Hematoxylin & eosin and immunohistochemical staining indicated that ML7 was able to decrease the expression of MLCK and MLC phosphorylation in the arterial wall of rabbits fed a high‑fat diet. A similar change was observed for the TJ proteins ZO‑1 and occludin. In addition, western blot analysis demonstrated that ML7 increased the expression levels of occludin in the precipitate, but reduced its expression in the supernatant of lysed aortas. These results indicated that occludin, which is a dynamic protein at the TJ, is associated with remodeling from cell membrane to cytoplasm. The present study was the first, to the best of our knowledge, to indicate that ML7 may ameliorate VED and AS by regulating the TJ proteins ZO‑1 and occludin via mechanisms involving MLCK and MLC phosphorylation.
Collapse
Affiliation(s)
- Xiaowen Cheng
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Xiaobian Wang
- Laboratory of Molecular Biology and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yufeng Wan
- Department of Otolaryngology, The Affiliated Chaohu Hospital of Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Qing Zhou
- Laboratory of Molecular Biology and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Huaqing Zhu
- Laboratory of Molecular Biology and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yuan Wang
- Laboratory of Molecular Biology and Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| |
Collapse
|