251
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Xiong FY, Tang ST, Su H, Tang HQ, Jiang P, Zhou Q, Wang Y, Zhu HQ. Melatonin ameliorates myocardial apoptosis by suppressing endoplasmic reticulum stress in rats with long‑term diabetic cardiomyopathy. Mol Med Rep 2017; 17:374-381. [PMID: 29115422 DOI: 10.3892/mmr.2017.7841] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 08/24/2017] [Indexed: 11/05/2022] Open
Abstract
The effects of melatonin (MLT), which exerts cardioprotective effects against myocardial apoptosis, in long‑term diabetic cardiomyopathy are not currently well defined. The present study aimed to investigate how MLT protects the heart through modulating myocardial apoptosis in rats with type 2 diabetes mellitus (DM). In total, 36 rats were randomly divided into three groups, including control (n=12), DM (n=12) and DM + MLT (n=12) groups. The results demonstrated that, in DM rats, a significant increase was observed in the serum fasting blood glucose and lipid levels, in addition to insulin resistance and cardiac dysfunction, which were attenuated in DM rats treated with MLT. Additionally, cellular apoptosis in rats with DM was increased, and the expression of Bcl‑2 was downregulated, while levels of Bcl‑2‑associated X and caspase‑3 were upregulated, and these observations were reversed by MLT, as determined by TUNEL and western blot analysis, respectively. As increased endoplasmic reticulum (ER) stress induced by hyperglycemia is reported to be a factor for apoptosis, the present study also determined the expression of proteins associated with ER stress in cardiac tissues following MLT treatment by western blotting. The results further indicated that MLT decreased the expression of ER stress hallmarks, including CCAAT/enhancer‑binding protein homologous protein, glucose‑regulated protein 78, protein kinase RNA‑like endoplasmic reticulum kinase (PERK) and activating transcription factor 6α in cardiac tissues. In conclusion, the results of the present study indicate that MLT may protect heart by ameliorating cardiac ER stress‑induced apoptosis in diabetic cardiomyopathy.
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Affiliation(s)
- Fang-Yuan Xiong
- Laboratory of Molecular Biology, Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Song-Tao Tang
- Department of Endocrinology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Huan Su
- Laboratory of Molecular Biology, Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Hai-Qin Tang
- Department of Geriatrics, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Pin Jiang
- Department of Geriatrics, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Qing Zhou
- Laboratory of Molecular Biology, Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yuan Wang
- Laboratory of Molecular Biology, Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Hua-Qing Zhu
- Laboratory of Molecular Biology, Department of Biochemistry, Anhui Medical University, Hefei, Anhui 230032, P.R. China
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252
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Shin NR, Park JW, Lee IC, Ko JW, Park SH, Kim JS, Kim JC, Ahn KS, Shin IS. Melatonin suppresses fibrotic responses induced by cigarette smoke via downregulation of TGF-β1. Oncotarget 2017; 8:95692-95703. [PMID: 29221159 PMCID: PMC5707053 DOI: 10.18632/oncotarget.21680] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 09/22/2017] [Indexed: 12/18/2022] Open
Abstract
Cigarette smoke (CS) is the most important risk factor in the development of chronic obstructive pulmonary disease (COPD). Pulmonary fibrosis is an irreversible response and important feature of COPD. In this study, we investigated the effects of melatonin on fibrotic response in development of COPD using a CS and lipopolysaccharide (LPS) induced COPD model and cigarette smoke condensate (CSC)-stimulated NCI-H292 cells, a human mucoepidermoid cell line. Mice were exposed to CS for 1 h per day (8 cigarettes per day) from day 1 to day 7 and were treated intranasally with LPS on day 4. Melatonin (10 or 20 mg/kg) was injected intraperitoneally 1 h before CS exposure. Melatonin decreased the inflammatory cell counts in bronchoalveolar lavage fluid (BALF), with a reduction in transforming growth factor (TGF)-β1. Melatonin inhibited the expression of TGF-β1, collagen I and SMAD3 phosphorylation in lung tissue exposed to CS and LPS. In CSC-stimulated H292 cells, melatonin suppressed the elevated expression of fibrotic mediators induced by CSC treatment. Melatonin reduced the expression of TGF-β1, collagen I, SMAD3 and p38 phosphorylation in CSC-stimulated H292 cells. In addition, cotreatment with melatonin and TGF-β1 inhibitors significantly limited fibrotic mediators, with greater reductions in the expression of TGF-β1, collagen I, SMAD3 and p38 phosphorylation than those of H292 cells treated with TGF-β1 inhibitor alone. Taken together, melatonin effectively inhibited fibrotic responses induced by CS and LPS exposure, which was related to the downregulation of TGF-β1. Therefore, our results suggest that melatonin may suppress the pulmonary fibrotic response induced by CS.
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Affiliation(s)
- Na-Rae Shin
- College of Veterinary Medicine (BK21 Plus Project Team), Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Ji-Won Park
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungbuk 363-883, Republic of Korea
| | - In-Chul Lee
- Natural Product Research Center, Jeonbuk Branch, Korea Research Institute of Biosciences and Biotechnology, Jeongeup 580-185, Republic of Korea
| | - Je-Won Ko
- College of Veterinary Medicine (BK21 Plus Project Team), Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Sung-Hyeuk Park
- College of Veterinary Medicine (BK21 Plus Project Team), Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Joong-Sun Kim
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Jong-Choon Kim
- College of Veterinary Medicine (BK21 Plus Project Team), Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Kyung-Seop Ahn
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungbuk 363-883, Republic of Korea
| | - In-Sik Shin
- College of Veterinary Medicine (BK21 Plus Project Team), Chonnam National University, Gwangju 500-757, Republic of Korea
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253
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Favero G, Franceschetti L, Bonomini F, Rodella LF, Rezzani R. Melatonin as an Anti-Inflammatory Agent Modulating Inflammasome Activation. Int J Endocrinol 2017; 2017:1835195. [PMID: 29104591 PMCID: PMC5643098 DOI: 10.1155/2017/1835195] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 08/27/2017] [Indexed: 12/22/2022] Open
Abstract
Inflammation may be defined as the innate response to harmful stimuli such as pathogens, injury, and metabolic stress; its ultimate function is to restore the physiological homeostatic state. The exact aetiology leading to the development of inflammation is not known, but a combination of genetic, epigenetic, and environmental factors seems to play an important role in the pathogenesis of many inflammation-related clinical conditions. Recent studies suggest that the pathogenesis of different inflammatory diseases also involves the inflammasomes, intracellular multiprotein complexes that mediate activation of inflammatory caspases thereby inducing the secretion of proinflammatory cytokines. Melatonin, an endogenous indoleamine, is considered an important multitasking molecule with fundamental clinical applications. It is involved in mood modulation, sexual behavior, vasomotor control, and immunomodulation and influences energy metabolism; moreover, it acts as an oncostatic and antiaging molecule. Melatonin is an important antioxidant and also a widespread anti-inflammatory molecule, modulating both pro- and anti-inflammatory cytokines in different pathophysiological conditions. This review, first, gives an overview concerning the growing importance of melatonin in the inflammatory-mediated pathological conditions and, then, focuses on its roles and its protective effects against the activation of the inflammasomes and, in particular, of the NLRP3 inflammasome.
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Affiliation(s)
- Gaia Favero
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Lorenzo Franceschetti
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Francesca Bonomini
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
- Interdepartmental University Center of Research “Adaption and Regeneration of Tissues and Organs (ARTO)”, University of Brescia, Brescia, Italy
| | - Luigi Fabrizio Rodella
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
- Interdepartmental University Center of Research “Adaption and Regeneration of Tissues and Organs (ARTO)”, University of Brescia, Brescia, Italy
| | - Rita Rezzani
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
- Interdepartmental University Center of Research “Adaption and Regeneration of Tissues and Organs (ARTO)”, University of Brescia, Brescia, Italy
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254
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Berger HR, Nyman AKG, Morken TS, Vettukattil R, Brubakk AM, Widerøe M. Early metabolite changes after melatonin treatment in neonatal rats with hypoxic-ischemic brain injury studied by in-vivo1H MR spectroscopy. PLoS One 2017; 12:e0185202. [PMID: 28934366 PMCID: PMC5608359 DOI: 10.1371/journal.pone.0185202] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 09/07/2017] [Indexed: 12/31/2022] Open
Abstract
Melatonin is a promising neuroprotective agent after perinatal hypoxic-ischemic (HI) brain injury. We used in-vivo1H magnetic resonance spectroscopy to investigate effects of melatonin treatment on brain metabolism after HI. Postnatal day 7 Sprague-Dawley rats with unilateral HI brain injury were treated with either melatonin 10 mg/kg dissolved in phosphate-buffered saline (PBS) with 5% dimethyl sulfoxide (DMSO) or vehicle (5% DMSO and/or PBS) directly and at 6 hours after HI. 1H MR spectra from the thalamus in the ipsilateral and contralateral hemisphere were acquired 1 day after HI. Our results showed that injured animals had a distinct metabolic profile in the ipsilateral thalamus compared to sham with low concentrations of total creatine, choline, N-acetyl aspartate (NAA), and high concentrations of lipids. A majority of the melatonin-treated animals had a metabolic profile characterized by higher total creatine, choline, NAA and lower lipid levels than other HI animals. When comparing absolute concentrations, melatonin treatment resulted in higher glutamine levels and lower lipid concentrations compared to DMSO treatment as well as higher macromolecule levels compared to PBS treatment day 1 after HI. DMSO treated animals had lower concentrations of glucose, creatine, phosphocholine and macromolecules compared to sham animals. In conclusion, the neuroprotective effects of melatonin were reflected in a more favorable metabolic profile including reduced lipid levels that likely represents reduced cell injury. Neuroprotective effects may also be related to the influence of melatonin on glutamate/glutamine metabolism. The modulatory effects of the solvent DMSO on cerebral energy metabolism might have masked additional beneficial effects of melatonin.
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Affiliation(s)
- Hester Rijkje Berger
- Department of Laboratory Medicine, Children’s and Women’s Health, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Pediatrics, St. Olavs University Hospital HF, Trondheim, Norway
- * E-mail:
| | - Axel K. G. Nyman
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway
| | - Tora Sund Morken
- Department of Laboratory Medicine, Children’s and Women’s Health, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Ophthalmology, St. Olavs University Hospital HF, Trondheim, Norway
| | - Riyas Vettukattil
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ann-Mari Brubakk
- Department of Laboratory Medicine, Children’s and Women’s Health, Norwegian University of Science and Technology, Trondheim, Norway
| | - Marius Widerøe
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway
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255
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Liu G, Jiang Q, Chen S, Fang J, Ren W, Yin J, Yao K, Yin Y. Melatonin alters amino acid metabolism and inflammatory responses in colitis mice. Amino Acids 2017; 49:2065-2071. [PMID: 28929336 DOI: 10.1007/s00726-017-2489-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 09/11/2017] [Indexed: 12/21/2022]
Abstract
Inflammatory bowel disease is a chronic inflammatory dysfunction of the gastrointestinal tract. This study explored the hypothesis that melatonin has beneficial functions in the mouse model of colitis induced by dextran sodium sulfate (DSS), with a specific focus on the expression of intestinal inflammatory cytokines and the serum levels of amino acids. The results revealed that mice with melatonin supplementation had a reduction in weight loss and disease index induced by DSS treatment. Melatonin stifled the expression of colonic IL-17 in mice with DSS-induced colitis. Melatonin also lowered the serum levels of Asp, Ser, Met, and Leu (p < 0.05), but increased those of Glu and Cys (p < 0.05). Thus, melatonin treatment is promising and may function as a potential adjuvant therapy to alleviate the clinical symptoms of patients with inflammatory bowel disease.
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Affiliation(s)
- Gang Liu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, 410125, Hunan, China
| | - Qian Jiang
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, 410125, Hunan, China
| | - Shuai Chen
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, 410125, Hunan, China
| | - Jun Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, Hunan, China
| | - Wenkai Ren
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, 410125, Hunan, China.
| | - Jie Yin
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, 410125, Hunan, China
| | - Kang Yao
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, 410125, Hunan, China.
| | - Yulong Yin
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, 410125, Hunan, China.,Animal Nutrition and Human Health Laboratory, School of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China.,College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
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256
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Carpentieri AR, Peralta Lopez ME, Aguilar J, Solá VM. Melatonin and periodontal tissues: Molecular and clinical perspectives. Pharmacol Res 2017; 125:224-231. [PMID: 28918172 DOI: 10.1016/j.phrs.2017.09.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/26/2017] [Accepted: 09/06/2017] [Indexed: 12/29/2022]
Abstract
Periodontal disease is a frequent chronic inflammatory pathology that implies the destruction of the tissues supporting the teeth, which represents a high sanitary cost. It usually appears associated with other systemic conditions such as diabetes, metabolic syndrome, depression and Alzheimer disease among others. The presence of melatonin and its receptors in the oral cavity supports the hypothesis that this hormone could play a role in homeostasis of periodontal tissues. In the present review we will discuss the potential role of melatonin, a circadian synchronizing hormone, with proved antiinflammatory and antioxidant profile, in the pathogenesis and treatment of periodontitis. Particular emphasis will be placed on the role of the indolamine in the treatment of periodontal disease when this oral condition is comorbid with other pathologies that would also benefit from the therapeutic potential of melatonin and its analogs through diverse mechanisms.
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Affiliation(s)
- Agata Rita Carpentieri
- Cátedra "B" de Química Biológica, Facultad de Odontología, Universidad Nacional de Córdoba, Córdoba, Argentina; INICSA/UNC-CONICET, Enrique Barros esquina Enfermera Gordillo, Ciudad Universitaria, Córdoba, Argentina.
| | - María Elena Peralta Lopez
- Cátedra "B" de Química Biológica, Facultad de Odontología, Universidad Nacional de Córdoba, Córdoba, Argentina; Cátedra de Clínica Médica II, Hospital San Roque, Facultad de Ciencias Médicas,UNC, Córdoba, Argentina
| | - Javier Aguilar
- Instituto Dr. José M. Vanella, Facultad de Ciencias Médicas, UNC, Córdoba, Argentina; Cátedra "B" de Introducción a la Física y Química Biológica, Facultad de Odontología, UNC, Córdoba, Argentina
| | - Verónica Mariana Solá
- Cátedra "B" de Química Biológica, Facultad de Odontología, Universidad Nacional de Córdoba, Córdoba, Argentina
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257
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Ko EY, Cho SH, Kwon SH, Eom CY, Jeong MS, Lee W, Kim SY, Heo SJ, Ahn G, Lee KP, Jeon YJ, Kim KN. The roles of NF-κB and ROS in regulation of pro-inflammatory mediators of inflammation induction in LPS-stimulated zebrafish embryos. FISH & SHELLFISH IMMUNOLOGY 2017; 68:525-529. [PMID: 28743626 DOI: 10.1016/j.fsi.2017.07.041] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 07/17/2017] [Accepted: 07/21/2017] [Indexed: 06/07/2023]
Abstract
In this study, the roles of reactive oxygen species (ROS) and NF-κB on inflammation induction in lipopolysaccharide (LPS)-stimulated zebrafish embryos were evaluated using N-acetyl-l-cysteine (NAC) and pyrrolidine dithiocarbamate (PDTC), specific inhibitors of ROS and NF-κB, respectively. LPS-stimulated zebrafish embryos showed increasing production of NO and ROS and expression of iNOS and COX-2 protein, compared to a control group without LPS. However, NAC significantly inhibited production of NO and ROS and markedly suppressed expression of iNOS and COX-2 protein in LPS-stimulated zebrafish embryos. The mRNA expressions of NF-κB such as p65NF-κB and IκB-A were significantly increased after LPS stimulation, whereas PDTC attenuated mRNA expression of NF-κB. PDTC also inhibited production of NO and reduced expression of iNOS and COX-2 protein in LPS-stimulated zebrafish embryos. Taken together, these results indicated that LPS increases pro-inflammatory mediators in zebrafish embryos through ROS and NF-κB regulation.
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Affiliation(s)
- Eun-Yi Ko
- Chuncheon Center, Korea Basic Science Institute (KBSI), Chuncheon 24341, Republic of Korea; Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Su-Hyeon Cho
- Chuncheon Center, Korea Basic Science Institute (KBSI), Chuncheon 24341, Republic of Korea; Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Seung-Hae Kwon
- Chuncheon Center, Korea Basic Science Institute (KBSI), Chuncheon 24341, Republic of Korea
| | - Chi-Yong Eom
- Chuncheon Center, Korea Basic Science Institute (KBSI), Chuncheon 24341, Republic of Korea
| | - Myeong Seon Jeong
- Chuncheon Center, Korea Basic Science Institute (KBSI), Chuncheon 24341, Republic of Korea
| | - WonWoo Lee
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Seo-Young Kim
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea
| | - Soo-Jin Heo
- Jeju International Marine Science Center for Research & Education, Korea Institute of Ocean Science and Technology, Jeju 63349, Republic of Korea
| | - Ginnae Ahn
- Department of Marine Bio-food Science, College of Fisheries and Ocean Sciences, Chonnam National University, 59626, Republic of Korea
| | - Kang Pa Lee
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - You-Jin Jeon
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea.
| | - Kil-Nam Kim
- Chuncheon Center, Korea Basic Science Institute (KBSI), Chuncheon 24341, Republic of Korea; Department of Marin Biotechnology, University of Science and Technology, Daejeon 34113, Republic of Korea.
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258
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Melatonin enhances sorafenib actions in human hepatocarcinoma cells by inhibiting mTORC1/p70S6K/HIF-1α and hypoxia-mediated mitophagy. Oncotarget 2017; 8:91402-91414. [PMID: 29207653 PMCID: PMC5710933 DOI: 10.18632/oncotarget.20592] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 08/09/2017] [Indexed: 12/29/2022] Open
Abstract
The antiangiogenic effects of sustained sorafenib treatment in hepatocellular carcinoma (HCC) lead to the occurrence of hypoxia-mediated drug resistance resulting in low therapy efficiency and negative outcomes. Combined treatments with coadjuvant compounds to target the hypoxia-inducible factor-1α (HIF-1α) represent a promising therapeutic approach through which sorafenib efficiency may be improved. Melatonin is a well-documented oncostatic agent against different cancer types. Here, we evaluated whether melatonin could enhance sorafenib cytotoxicity and overcome the hypoxia-mediated resistance mechanisms in HCC. The pharmacological melatonin concentration (2 mM) potentiated the oncostatic effects of sorafenib (5 μM) on Hep3B cells even under hypoxia. Melatonin downregulated the HIF-1α protein synthesis through the inhibition of the mammalian target of rapamycin complex 1 (mTORC1)/ribosomal protein S6 kinase beta-1 (p70S6K)/ribosomal protein S6 (RP-S6) pathway, although the indole enhanced Akt phosphorylation by the mTORC1/C2 negative feedback. Furthermore, melatonin and sorafenib coadministration reduced the HIF-1α-mitophagy targets expression, impaired autophagosome formation and subsequent mitochondria and lysosomes colocalization. Together, our results indicate that melatonin improves the Hep3B sensitivity to sorafenib, preventing HIF-1α synthesis to block the cytoprotective mitophagy induced by the hypoxic microenvironment, an important element of the multifactorial mechanisms responsible for the chemotherapy failure.
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259
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Liu Z, Gan L, Xu Y, Luo D, Ren Q, Wu S, Sun C. Melatonin alleviates inflammasome-induced pyroptosis through inhibiting NF-κB/GSDMD signal in mice adipose tissue. J Pineal Res 2017; 63. [PMID: 28398673 DOI: 10.1111/jpi.12414] [Citation(s) in RCA: 242] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 04/07/2017] [Indexed: 12/11/2022]
Abstract
Pyroptosis is a proinflammatory form of cell death that is associated with pathogenesis of many chronic inflammatory diseases. Melatonin is substantially reported to possess anti-inflammatory properties by inhibiting inflammasome activation. However, the effects of melatonin on inflammasome-induced pyroptosis in adipocytes remain elusive. Here, we demonstrated that melatonin alleviated lipopolysaccharides (LPS)-induced inflammation and NLRP3 inflammasome formation in mice adipose tissue. The NLRP3 inflammasome-mediated pyroptosis was also inhibited by melatonin in adipocytes. Further analysis revealed that gasdermin D (GSDMD), the key executioner of pyroptosis, was the target for melatonin inhibition of adipocyte pyroptosis. Importantly, we determined that nuclear factor κB (NF-κB) signal was required for the GSDMD-mediated pyroptosis in adipocytes. We also confirmed that melatonin alleviated adipocyte pyroptosis by transcriptional suppression of GSDMD. Moreover, GSDMD physically interacted with interferon regulatory factor 7 (IRF7) and subsequently formed a complex to promote adipocyte pyroptosis. Melatonin also attenuated NLRP3 inflammasome activation and pyroptosis, which was induced by LPS or obesity. In summary, our results demonstrate that melatonin alleviates inflammasome-induced pyroptosis by blocking NF-κB/GSDMD signal in mice adipose tissue. Our data reveal a novel function of melatonin on adipocyte pyroptosis, suggesting a new potential therapy for melatonin to prevent and treat obesity caused systemic inflammatory response.
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Affiliation(s)
- Zhenjiang Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Lu Gan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Yatao Xu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Dan Luo
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Qian Ren
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Song Wu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Chao Sun
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
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260
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Shen T, Wang G, You L, Zhang L, Ren H, Hu W, Qiang Q, Wang X, Ji L, Gu Z, Zhao X. Polysaccharide from wheat bran induces cytokine expression via the toll-like receptor 4-mediated p38 MAPK signaling pathway and prevents cyclophosphamide-induced immunosuppression in mice. Food Nutr Res 2017; 61:1344523. [PMID: 28747866 PMCID: PMC5510218 DOI: 10.1080/16546628.2017.1344523] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 06/15/2017] [Indexed: 12/16/2022] Open
Abstract
Wheat bran-derived polysaccharides have attracted particular attention due to their immunomodulatory effects. However, the molecular mechanisms underlying their functions are poorly understood. The current study was designed to examine the effect of wheat bran polysaccharide (WBP) on RAW 264.7 cells and the underlying signaling pathways, which have not been explored. In addition, we also investigated the immuno-enhancement effects of WBP on cyclophosphamide (CTX)-induced immunosuppression in mice. WBP significantly increased the concentrations of intracellular nitric oxide (NO) and cytokines such as prostaglandin E2 (PGE2) and tumor necrosis factor-α (TNF-α) in RAW 264.7 cells. The result of RT-PCR analysis indicated that WBP also enhanced inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), and TNF-α expression. Further analyses demonstrated that WBP rapidly activated phosphorylated p38 mitogen-activated protein kinase (MAPK) and the transcriptional activities of activator protein-1 (AP-1) and nuclear factor (NF)-κB via toll-like receptor 4 (TLR4). Furthermore, in vivo experiments revealed that WBP increased the spleen and thymus indices significantly, and markedly promoted the production of the serum cytokines IL-2 and IFN-γ in CTX-induced immunosuppressed mice. Taken together, these results suggest that WBP can improve immunity by enhancing immune function, and could be explored as a potential immunomodulatory agent in functional food.
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Affiliation(s)
- Ting Shen
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China
| | - Gongcheng Wang
- Department of Urology, Huai'an First People's Hospital, Nanjing Medical University, Huaian, PR China
| | - Long You
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China
| | - Liang Zhang
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China
| | - Haiwei Ren
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, PR China
| | - Weicheng Hu
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China
| | - Qian Qiang
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China
| | - Xinfeng Wang
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China
| | - Lilian Ji
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China
| | - Zhengzhong Gu
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China.,Huaiyin Institute of Agricultural Science of Xuhuai Region, Huaian, PR China
| | - Xiangxiang Zhao
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental protection/Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, PR China
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261
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Biological functions of melatonin in relation to pathogenesis of oral lichen planus. Med Hypotheses 2017; 104:40-44. [DOI: 10.1016/j.mehy.2017.05.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 04/20/2017] [Accepted: 05/24/2017] [Indexed: 12/21/2022]
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262
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Yi WJ, Kim TS. Melatonin protects mice against stress-induced inflammation through enhancement of M2 macrophage polarization. Int Immunopharmacol 2017; 48:146-158. [DOI: 10.1016/j.intimp.2017.05.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/18/2017] [Accepted: 05/06/2017] [Indexed: 01/08/2023]
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263
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Melatonin Modulates Neuronal Cell Death Induced by Endoplasmic Reticulum Stress under Insulin Resistance Condition. Nutrients 2017; 9:nu9060593. [PMID: 28604593 PMCID: PMC5490572 DOI: 10.3390/nu9060593] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/06/2017] [Accepted: 06/08/2017] [Indexed: 12/25/2022] Open
Abstract
Insulin resistance (IR) is an important stress factor in the central nervous system, thereby aggravating neuropathogenesis and triggering cognitive decline. Melatonin, which is an antioxidant phytochemical and synthesized by the pineal gland, has multiple functions in cellular responses such as apoptosis and survival against stress. This study investigated whether melatonin modulates the signaling of neuronal cell death induced by endoplasmic reticulum (ER) stress under IR condition using SH-SY5Y neuroblastoma cells. Apoptosis cell death signaling markers (cleaved Poly [ADP-ribose] polymerase 1 (PARP), p53, and Bax) and ER stress markers (phosphorylated eIF2α (p-eIF2α), ATF4, CHOP, p-IRE1, and spliced XBP1 (sXBP1)) were measured using reverse transcription-PCR, quantitative PCR, and western blottings. Immunofluorescence staining was also performed for p-ASK1 and p-IRE1. The mRNA or protein expressions of cell death signaling markers and ER stress markers were increased under IR condition, but significantly attenuated by melatonin treatment. Insulin-induced activation of ASK1 (p-ASK1) was also dose dependently attenuated by melatonin treatment. The regulatory effect of melatonin on neuronal cells under IR condition was associated with ASK1 signaling. In conclusion, the result suggested that melatonin may alleviate ER stress under IR condition, thereby regulating neuronal cell death signaling.
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264
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The anti-inflammatory effect of melatonin in SH-SY5Y neuroblastoma cells exposed to sublethal dose of hydrogen peroxide. Mech Ageing Dev 2017; 164:49-60. [DOI: 10.1016/j.mad.2017.04.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 04/04/2017] [Accepted: 04/05/2017] [Indexed: 01/28/2023]
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265
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Yu GM, Kubota H, Okita M, Maeda T. The anti-inflammatory and antioxidant effects of melatonin on LPS-stimulated bovine mammary epithelial cells. PLoS One 2017; 12:e0178525. [PMID: 28542575 PMCID: PMC5444821 DOI: 10.1371/journal.pone.0178525] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 05/15/2017] [Indexed: 01/08/2023] Open
Abstract
Mastitis is the most prevalent disease in dairy cattle worldwide and not only causes huge economic losses in the dairy industry but also threatens public health. To evaluate the therapeutic potential of melatonin in mastitis, we examined the ability of melatonin to protect bovine mammary epithelial cells (bMECs) from the harmful effects of lipopolysaccharide (LPS). We found that melatonin inhibited the LPS-binding protein-CD14-TLR4 signaling pathway in bMECs, which had opposing effects on pro-inflammatory and anti-inflammatory mediators. Melatonin decreased LPS-induced expression of pro-inflammatory cytokines, chemokines, and positive acute-phase proteins (APPs), including tumor necrosis factor-α, interleukin (IL)-1β, IL-6, granulocyte-monocyte colony-stimulating factor, chemokine CC motif ligand (CCL)2, CCL5, serum amyloid A, haptoglobin, C-reactive protein, ceruloplasmin, and α-1 antitrypsin, and increased expression of the anti-inflammatory cytokine IL-1Ra and the negative APP fibrinogen. In addition, melatonin increased dityrosine levels but suppressed nitrite levels by upregulating the expression of Nrf2 and heme oxygenase-1 in the Nrf2 antioxidant defense pathway. Finally, melatonin administration increased the viability of LPS-stimulated bMECs. These results suggest that melatonin protects bMECs from LPS-induced inflammatory and oxidant stress damage and provide evidence that melatonin might have therapeutic utility in mastitis.
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Affiliation(s)
- Guang-Min Yu
- Department of Bioresource Science, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
| | - Hirokazu Kubota
- Setouchi Field Science Center, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
| | - Miki Okita
- Setouchi Field Science Center, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
- The Research Center for Animal Science, Hiroshima University, Higashi-Hiroshima, Japan
| | - Teruo Maeda
- Department of Bioresource Science, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
- Setouchi Field Science Center, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
- The Research Center for Animal Science, Hiroshima University, Higashi-Hiroshima, Japan
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266
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Melatonin Attenuates Pulmonary Hypertension in Chronically Hypoxic Rats. Int J Mol Sci 2017; 18:ijms18061125. [PMID: 28538666 PMCID: PMC5485949 DOI: 10.3390/ijms18061125] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/19/2017] [Accepted: 05/19/2017] [Indexed: 11/17/2022] Open
Abstract
Chronic hypoxia induces pulmonary hypertension and vascular remodeling, which are clinically relevant to patients with chronic obstructive pulmonary disease (COPD) associated with a decreased level of nitric oxide (NO). Oxidative stress and inflammation play important roles in the pathophysiological processes in COPD. We examined the hypothesis that daily administration of melatonin (10 mg/kg) mitigates the pulmonary hypertension and vascular remodeling in chronically hypoxic rats. The right ventricular systolic pressure (RVSP) and the thickness of pulmonary arteriolar wall were measured from normoxic control, vehicle- and melatonin-treated hypoxic rats exposed to 10% O2 for 14 days. Levels of markers for oxidative stress (malondialdhyde) and inflammation (tumor necrosis factor-α (TNFα), inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2)) and the expressions of total endothelial NO synthase (eNOS) and phosphorylated eNOS at serine1177 (ser1177) were determined in the lung tissue. We found that the RVSP and the thickness of the arteriolar wall were significantly increased in the vehicle-treated hypoxic animals with elevated levels of malondialdhyde and mRNA expressions of the inflammatory mediators, when compared with the normoxic control. In addition, the phosphorylated eNOS (ser1177) level was significantly decreased, despite an increased eNOS expression in the vehicle-treated hypoxic group. Melatonin treatment significantly attenuated the levels of RVSP, thickness of the arteriolar wall, oxidative and inflammatory markers in the hypoxic animals with a marked increase in the eNOS phosphorylation in the lung. These results suggest that melatonin attenuates pulmonary hypertension by antagonizing the oxidative injury and restoration of NO production.
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267
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Cheng L, Liu J, Liu Q, Liu Y, Fan L, Wang F, Yu H, Li Y, Bu L, Li X, Wei W, Wang H, Sun G. Exosomes from Melatonin Treated Hepatocellularcarcinoma Cells Alter the Immunosupression Status through STAT3 Pathway in Macrophages. Int J Biol Sci 2017; 13:723-734. [PMID: 28655998 PMCID: PMC5485628 DOI: 10.7150/ijbs.19642] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/27/2017] [Indexed: 02/06/2023] Open
Abstract
Immunosuppression is a significant factor in the progression of tumor invasion and metastasis. Melatonin, a well-known hormone, has certain cytotoxic and immune regulatory effects to inhibit tumor function. Exosomes are small membrane vesicles released by many kinds of cells, which contain different macromolecules, such as mRNAs and microRNAs (miRNAs), and proteins that can mediate communications between cells. Tumor-derived exosomes may cause immunosuppression, however, it is unknown whether melatonin can attenuate an immunosuppressive status by altering the function of tumor-derived exosomes. In the present study, we evaluated the effects of hepatocellularcarcinoma-derived exosomes (Exo-con) and exosomes derived from hepatocellularcarcinoma cells treated with 0.1 mM melatonin (Exo-MT), on the expression of inflammatory factors and programmed death ligand 1(PD-L1) by co-culturing Exo-con and Exo-MT, respectively, with macrophages differentiated from THP-1 cells or RAW264.7 cells. Our in vitro results indicate that Exo-MT can downregulate the expression of PD-L1 on macrophages while Exo-con can upregulate the expression of PD-L1 through flow cytometry and immunofluorescence analysis. In addition, Exo-con upregulates the secretion of cytokines, such as IL-6, IL-10, IL-1β, and TNF-α in macrophages. Accordingly, Exo-MT could attenuate the high expression of these inflammatory cytokines. Furthermore, in vivo experiments confirmed the results found in vitro. PD-L1 expression and cytokine secretion were lower in the Exo-MT group compared with those in the Exo-con group. Working to identify a specific mechanism, our research shows that Exo-MT decreases STAT3 activation compared to the Exo-con group. In summary, we found exosomes from melatonin treated hepatocellularcarcinoma cells alters the immunosupression status through STAT3 pathway in macrophages. Our study may provide a new avenue to investigate the mechanisms of melatonin in regulating an immunosuppressive status.
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Affiliation(s)
- Liang Cheng
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Jiatao Liu
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China.,Department of Pharmacy, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Qingqing Liu
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Yu Liu
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Lulu Fan
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Fang Wang
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Hanqing Yu
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Yuhuan Li
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Lijia Bu
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Xiaoqiu Li
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
| | - Wei Wei
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei 230032, Anhui, China
| | - Hua Wang
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China.,Institute for Liver Diseases of Anhui Medical University, Hefei 230032, Anhui, China
| | - Guoping Sun
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
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268
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Tekin G, İsbir S, Şener G, Çevik Ö, Çetinel Ş, Dericioğlu O, Arsan S, Çobanoğlu A. The preventive and curative effects of melatonin against abdominal aortic aneurysm in rats. J Vasc Surg 2017; 67:1546-1555. [PMID: 28478022 DOI: 10.1016/j.jvs.2017.04.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 06/05/2016] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Oxygen free radicals are important components involved in the histopathologic tissue alterations observed during abdominal aortic aneurysms (AAAs). This study examined whether melatonin has protective or therapeutic effects against AAAs. METHODS Sprague-Dawley rats were divided into four groups. A CaCl2 model was used to induce AAA. Starting on the operation day (Mel+AAA+Mel group) or 4 weeks after the operation (AAA+Mel group), the rats received intraperitoneal melatonin (10 mg/kg/day) for 6 and 2 weeks, respectively. The control and AAA groups received vehicle for 2 weeks after the sham operation and AAA induction, respectively. Angiographic measurements were recorded at the beginning, week 4, and week 6 of the study. After decapitation, aorta tissues were taken for the measurement of malondialdehyde, 8-hydroxy-2'-deoxyguanosine, glutathione levels, and myeloperoxidase and caspase-3 activity. Matrix metalloproteinase (MMP)-2, MMP-9, tumor necrosis factor-α, and inducible nitric oxide synthase protein expressions were analyzed by Western blot technique. Aortic tissues were also examined by light microscopy. RESULTS CaCl2 caused an inflammatory response and oxidative damage indicated by rises in malondialdehyde and 8-hydroxy-2'-deoxyguanosine levels. Myeloperoxidase and caspase-3 activities were increased, but glutathione levels were reduced. On the one hand, MMP-2, MMP-9, tumor necrosis factor-α, and inducible nitric oxide synthase protein expressions were increased in the vehicle-treated AAA group. On the other hand, melatonin treatment reversed all of these biochemical indices and histopathologic alterations. CONCLUSIONS According to the data, although melatonin tended to reverse the biochemical parameters given on week 4, the preventive effect is more pronounced when given concomitantly with AAA induction because values were closer to the control levels.
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Affiliation(s)
- Gözde Tekin
- Department of Cardiovascular Surgery, School of Medicine, Marmara University, İstanbul, Turkey.
| | - Selim İsbir
- Department of Cardiovascular Surgery, School of Medicine, Marmara University, İstanbul, Turkey
| | - Göksel Şener
- Department of Pharmacology, School of Pharmacy, Marmara University, İstanbul, Turkey
| | - Özge Çevik
- Department of Biochemistry, School of Pharmacy, Cumhuriyet University, Sivas, Turkey
| | - Şule Çetinel
- Department of Histology and Embryology, School of Medicine, Marmara University, İstanbul, Turkey
| | - Okan Dericioğlu
- Department of Cardiovascular Surgery, School of Medicine, Marmara University, İstanbul, Turkey
| | - Sinan Arsan
- Department of Cardiovascular Surgery, School of Medicine, Marmara University, İstanbul, Turkey
| | - Adnan Çobanoğlu
- Department of Cardiovascular Surgery, School of Medicine, Marmara University, İstanbul, Turkey
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269
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Melatonin inhibits snake venom and antivenom induced oxidative stress and augments treatment efficacy. Acta Trop 2017; 169:14-25. [PMID: 28089603 DOI: 10.1016/j.actatropica.2017.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 11/10/2016] [Accepted: 01/07/2017] [Indexed: 12/25/2022]
Abstract
Snakebite is a neglected health hazard. Its patho-physiology has largely been focused on systemic and local toxicities; whereas, venom and antivenom induced oxidative stress has long been ignored. Antivenom therapy although neutralizes venom lethality and saves many lives, remains ineffective against oxidative stress. This prompted us to complement antivenom with an antioxidant molecule melatonin that would protect against oxidative stress and increase the efficacy of the existing snakebite therapy. Here we show that D. russelli and E. carinatus venoms induce strong oxidative stress that persists even after antivenom administration in mice model. Additionally, antivenoms also induce oxidative stress. Polyvalent antivenom induce more oxidative stress than monovalent antivenom. Strikingly, antivenom and melatonin together not only inhibit venom and antivenom induced oxidative stress but also significantly reduce the neutralizing antivenom dose. This study provides a therapeutic potential for enhancing the existing snakebite therapy. The combined treatment of antivenom+melatonin would prevent the upsurge of oxidative stress as well as minimize the antivenom load. Thus the investigation offers immense scope for physicians and toxinologists to reinvestigate, design new strategies and think beyond the conventional mode of antivenom therapy.
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270
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Hsu JT, Le PH, Lin CJ, Chen TH, Kuo CJ, Chiang KC, Yeh TS. Mechanism of salutary effects of melatonin-mediated liver protection after trauma-hemorrhage: p38 MAPK-dependent iNOS/HIF-1α pathway. Am J Physiol Gastrointest Liver Physiol 2017; 312:G427-G433. [PMID: 28254774 DOI: 10.1152/ajpgi.00440.2016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/08/2017] [Accepted: 02/19/2017] [Indexed: 01/31/2023]
Abstract
Although melatonin attenuates the increases in inflammatory mediators and reduces organ injury during trauma-hemorrhage, the mechanisms remain unclear. This study explored whether melatonin prevents liver injury after trauma-hemorrhage through the p38 mitogen-activated protein kinase (MAPK)-dependent, inducible nitrite oxide (iNOS)/hypoxia-inducible factor (HIF)-1α pathway. After a 5-cm midline laparotomy, male rats underwent hemorrhagic shock (mean blood pressure ~40 mmHg for 90 min) followed by fluid resuscitation. At the onset of resuscitation, rats were treated with vehicle, melatonin (2 mg/kg), melatonin plus p38 MAPK inhibitor SB203580 (2 mg/kg), or melatonin plus the melatonin receptor antagonist luzindole (2.5 mg/kg). At 2 h after trauma-hemorrhage, histopathology score of liver injury, liver tissue myeloperoxidase activity, malondialdehyde, adenosine triphosphate, serum alanine aminotransferase, and asparate aminotransferase levels were significantly increased compared with sham-operated control. Trauma-hemorrhage resulted in a significant decrease in the p38 MAPK activation compared with that in the sham-treated animals. Administration of melatonin after trauma-hemorrhage normalized liver p38 MAPK phosphorylation and iNOS and HIF-1α expression and attenuated cleaved caspase 3 and receptor interacting protein kinase-1 levels. Coadministration of SB203580 or luzindole abolished the melatonin-mediated attenuation of the trauma-hemorrhage-induced increase of iNOS/HIF-1α protein expression and liver injury markers. Taken together, our results suggest that melatonin prevents trauma-hemorrhage-induced liver injury in rats, at least in part, through melatonin receptor-related, p38 MAPK-dependent iNOS/HIF-1α pathway.NEW & NOTEWORTHY Trauma-hemorrhage resulted in a significant decrease in liver p38 MAPK activation and increase in nitrite oxide synthase (iNOS) and hypoxia-inducible factor (HIF)-1α expression. Administration of melatonin after trauma-hemorrhage normalized liver p38 MAPK phosphorylation and iNOS and HIF-1α expression, which was abolished by coadministration of SB203580 or luzindole. Melatonin prevents trauma-hemorrhage-induced liver injury in rats via the melatonin receptor-related, p38 MAPK-dependent iNOS/HIF-1α pathway.
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Affiliation(s)
- Jun-Te Hsu
- Department of Surgery, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan;
| | - Puo-Hsien Le
- Department of Gastroenterology, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan; and
| | - Chun-Jung Lin
- Department of Gastroenterology, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan; and
| | - Tsung-Hsing Chen
- Department of Gastroenterology, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan; and
| | - Chia-Jung Kuo
- Department of Gastroenterology, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan; and
| | - Kun-Chun Chiang
- Department of Surgery, Chang Gung Memorial Hospital at Keelung, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Ta-Sen Yeh
- Department of Surgery, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan
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271
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Favero G, Franceschetti L, Buffoli B, Moghadasian MH, Reiter RJ, Rodella LF, Rezzani R. Melatonin: Protection against age-related cardiac pathology. Ageing Res Rev 2017; 35:336-349. [PMID: 27884595 DOI: 10.1016/j.arr.2016.11.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 11/04/2016] [Accepted: 11/18/2016] [Indexed: 12/14/2022]
Abstract
Aging is a complex and progressive process that involves physiological and metabolic deterioration in every organ and system. Cardiovascular diseases are one of the most common causes of mortality and morbidity among elderly subjects worldwide. Most age-related cardiovascular disorders can be influenced by modifiable behaviours such as a healthy diet rich in fruit and vegetables, avoidance of smoking, increased physical activity and reduced stress. The role of diet in prevention of various disorders is a well-established factor, which has an even more important role in the geriatric population. Melatonin, an indoleamine with multiple actions including antioxidant properties, has been identified in a very large number of plant species, including edible plant products and medical herbs. Among products where melatonin has been identified include wine, olive oil, tomato, beer, and others. Interestingly, consumed melatonin in plant foods or melatonin supplementation may promote health benefits by virtue of its multiple properties and it may counteract pathological conditions also related to cardiovascular disorders, carcinogenesis, neurological diseases and aging. In the present review, we summarized melatonin effects against age-related cardiac alterations and abnormalities with a special focus on heart ischemia/reperfusion (IR) injury and myocardial infarction.
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Affiliation(s)
- Gaia Favero
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Lorenzo Franceschetti
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Barbara Buffoli
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Mohammed H Moghadasian
- Department of Human Nutritional Sciences, University of Manitoba and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, MB, Canada
| | - Russel J Reiter
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX, USA
| | - Luigi F Rodella
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Rita Rezzani
- Anatomy and Physiopathology Division, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, 25123 Brescia, Italy.
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272
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Hu W, Deng C, Ma Z, Wang D, Fan C, Li T, Di S, Gong B, Reiter RJ, Yang Y. Utilizing melatonin to combat bacterial infections and septic injury. Br J Pharmacol 2017; 174:754-768. [PMID: 28213968 PMCID: PMC5387000 DOI: 10.1111/bph.13751] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 02/07/2017] [Accepted: 02/13/2017] [Indexed: 12/11/2022] Open
Abstract
Melatonin, also known as N-acetyl-5-methoxytryptamine, is a ubiquitously acting molecule that is produced by the pineal gland and other organs of animals, including humans. As melatonin and its metabolites are potent antioxidants and free radical scavengers, they are protective against a variety of disorders. Moreover, multiple molecular targets of melatonin have been identified, and its actions are both receptor-mediated and receptor-independent. Recent studies have shown that melatonin may be useful in fighting against sepsis and septic injury due to its antioxidative and anti-inflammatory actions; the results generally indicate a promising therapeutic application for melatonin in the treatment of sepsis. To provide a comprehensive understanding regarding the protective effects of melatonin against septic injury, in the present review we have evaluated the published literature in which melatonin has been used to treat experimental and clinical sepsis. Firstly, we present the evidence from studies that have used melatonin to resist bacterial pathogens. Secondly, we illustrate the protective effect of melatonin against septic injury and discuss the possible mechanisms. Finally, the potential directions for future melatonin research against sepsis are summarized.
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Affiliation(s)
- Wei Hu
- Department of Thoracic and Cardiovascular SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
- Department of Biomedical EngineeringThe Fourth Military Medical UniversityXi'anChina
| | - Chao Deng
- Department of Cardiovascular Surgery, Xijing HospitalThe Fourth Military Medical UniversityXi'anChina
- Department of Thoracic Surgery, Tangdu HospitalThe Fourth Military Medical UniversityXi'anChina
| | - Zhiqiang Ma
- Department of Aerospace MedicineThe Fourth Military Medical UniversityXi'anChina
| | - Dongjin Wang
- Department of Thoracic and Cardiovascular SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Chongxi Fan
- Department of Aerospace MedicineThe Fourth Military Medical UniversityXi'anChina
| | - Tian Li
- Department of Biomedical EngineeringThe Fourth Military Medical UniversityXi'anChina
| | - Shouyin Di
- Department of Aerospace MedicineThe Fourth Military Medical UniversityXi'anChina
| | - Bing Gong
- Department of Thoracic and Cardiovascular SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
| | - Russel J Reiter
- Department of Cellular and Structural BiologyUT Health Science Center at San AntonioSan AntonioTXUSA
| | - Yang Yang
- Department of Thoracic and Cardiovascular SurgeryNanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical SchoolNanjingChina
- Department of Biomedical EngineeringThe Fourth Military Medical UniversityXi'anChina
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273
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Shen Z, Zhou Z, Gao S, Guo Y, Gao K, Wang H, Dang X. Melatonin Inhibits Neural Cell Apoptosis and Promotes Locomotor Recovery via Activation of the Wnt/β-Catenin Signaling Pathway After Spinal Cord Injury. Neurochem Res 2017; 42:2336-2343. [PMID: 28417262 DOI: 10.1007/s11064-017-2251-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 02/26/2017] [Accepted: 03/28/2017] [Indexed: 12/13/2022]
Abstract
The spinal cord is highly sensitive to spinal cord injury (SCI) by external mechanical damage, resulting in irreversible neurological damage. Activation of the Wnt/β-catenin signaling pathway can effectively reduce apoptosis and protect against SCI. Melatonin, an indoleamine originally isolated from bovine pineal tissue, exerts neuroprotective effects after SCI through activation of the Wnt/β-catenin signaling pathway. In this study, we demonstrated that melatonin exhibited neuroprotective effects on neuronal apoptosis and supported functional recovery in a rat SCI model by activating the Wnt/β-catenin signaling pathway. We found that melatonin administration after SCI significantly upregulated the expression of low-density lipoprotein receptor related protein 6 phosphorylation (p-LRP-6), lymphoid enhancer factor-1 (LEF-1) and β-catenin protein in the spinal cord. Melatonin enhanced motor neuronal survival in the spinal cord ventral horn and improved the locomotor functions of rats after SCI. Melatonin administration after SCI also reduced the expression levels of Bax and cleaved caspase-3 in the spinal cord and the proportion of terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end labeling (TUNEL) positive cells, but increased the expression level of Bcl-2. These results suggest that melatonin attenuated SCI by activating the Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Zhaoliang Shen
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, China.,Department of Orthopedics, Second Hospital of Jinzhou, Jinzhou, China.,Department of Orthopedics, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Zipeng Zhou
- Department of Orthopedics, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Shuang Gao
- Jinzhou Medical University, Jinzhou, China
| | - Yue Guo
- Department of Orthopedics, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Kai Gao
- Department of Orthopedics, Jining NO.1 People's Hospital, Jining, China
| | - Haoyu Wang
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, China
| | - Xiaoqian Dang
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an, China.
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274
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Bao Z, Zhang P, Yao Y, Lu G, Tong Z, Yan B, Tu L, Yang G, Zhou J. Deguelin Attenuates Allergic Airway Inflammation via Inhibition of NF-κb Pathway in Mice. Int J Biol Sci 2017; 13:492-504. [PMID: 28529457 PMCID: PMC5436569 DOI: 10.7150/ijbs.17238] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 03/02/2017] [Indexed: 01/10/2023] Open
Abstract
Asthma is a chronic respiratory disease characterized by airway inflammation and remodeling, resulting in a substantial economic burden on both patients and society. Deguelin, a constituent of the Leguminosae family, exhibits anti-proliferative and anti-inflammatory activities in cancer mice models via inhibiting phosphatidylinositol 3-kinases and the NF-κB pathway. We demonstrated that deguelin effectively reduced OVA-induced inflammatory cell recruitment, decreased lung tissue inflammation and mucus production, suppressed airway hyperresponsiveness, and inhibited serum immunoglobulin and Th2 cytokine levels in a dose-dependent manner in asthmatic mice. In addition, we found that deguelin reduced inflammatory gene expressions both in vivo and in vitro, which were closely associated with activation of the NF-κB signaling pathway. Thus, we further explored the underlying mechanisms of deguelin in normal human bronchial epithelial cells (BEAS-2B). Our results suggested that deguelin inhibited NF-κB binding activity by enhancing the ability of IκBα to maintain NF-κB in an inactive form in the cytoplasm and preventing the TNF-α induced translocation of p65 to the nucleus. In conclusion, our research indicates that deguelin attenuates allergic airway inflammation via inhibition of NF-κB pathway in mice model and may act as a potential therapeutic agent for patients with allergic airway inflammation.
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Affiliation(s)
- Zhang Bao
- Department of Respiratory Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Pei Zhang
- Department of Respiratory Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yinan Yao
- Department of Respiratory Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Guohua Lu
- Department of Respiratory Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Zhongkai Tong
- Department of Respiratory Diseases, Ningbo No.2 hospital, Ningbo, China
| | - Bing Yan
- Department of Respiratory Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Lingfang Tu
- Department of Respiratory Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Guangdie Yang
- Department of Respiratory Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jianying Zhou
- Department of Respiratory Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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275
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Zhang M, Dai X, Lu Y, Miao Y, Zhou C, Cui Z, Liu H, Xiong B. Melatonin protects oocyte quality from Bisphenol A-induced deterioration in the mouse. J Pineal Res 2017; 62. [PMID: 28178360 DOI: 10.1111/jpi.12396] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 02/03/2017] [Indexed: 01/02/2023]
Abstract
Bisphenol A (BPA) has been reported to adversely affect the mammalian reproductive system in both sexes. However, the underlying mechanisms regarding how BPA disrupts the mammalian oocyte quality and how to prevent it have not been fully defined. Here, we document that BPA weakens oocyte quality by impairing both oocyte meiotic maturation and fertilization ability. We find that oral administration of BPA (100 μg/kg body weight per day for 7 days) compromises the first polar body extrusion (78.0% vs 57.0%, P<.05) by disrupting normal spindle assembly, chromosome alignment, and kinetochore-microtubule attachment. This defect could be remarkably ameliorated (76.7%, P<.05) by concurrent oral administration of melatonin (30 mg/kg body weight per day for 7 days). In addition, BPA administration significantly decreases the fertilization rate of oocytes (87.2% vs 41.1%, P<.05) by reducing the number of sperm binding to the zona pellucida, which is consistent with the premature cleavage of ZP2 as well as the mis-localization and decreased protein level of ovastacin. Also, the localization and protein level of Juno, the sperm receptor on the egg membrane, are strikingly impaired in BPA-administered oocytes. Finally, we show that melatonin administration substantially elevates the in vitro fertilization rate (63.0%, P<.05) by restoring above defects of fertilization proteins and events, which might be mediated by the improvement of oocyte quality via reduction of ROS levels and inhibition of apoptosis. Collectively, our data reveal that melatonin has a protective action against BPA-induced deterioration of oocyte quality in mice.
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Affiliation(s)
- Mianqun Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Xiaoxin Dai
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yajuan Lu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yilong Miao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Changyin Zhou
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Zhaokang Cui
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Honglin Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Bo Xiong
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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276
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Melatonin attenuates thiocyanate-induced vasoconstriction in aortic rings. Saudi Pharm J 2017; 25:993-998. [PMID: 29158705 PMCID: PMC5681314 DOI: 10.1016/j.jsps.2017.03.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 03/24/2017] [Indexed: 01/15/2023] Open
Abstract
Cigarette smoking not only has a carcinogenic effect but also leads to an increase in arterial blood pressure. Besides its main components, i.e. nicotine, tar, and carbon monoxide, cigarette smoke also contains thiocyanate. Thiocyanate anions (SCN-) arise from the detoxification of hydrogen cyanide and its plasma concentrations were found to correlate significantly with cigarette consumption. There is also evidence that atherosclerotic disease progression is much more rapid when serum SCN- levels are increased. Melatonin, a non-toxic indolamine with various physiologic functions, is believed to protect against inflammatory processes and oxidative stress. It has been demonstrated that melatonin serves as free radical scavenger and represents a potent antioxidant. Therefore, it is believed that melatonin with its atheroprotective effects may be useful either as a sole therapy or in conjunction with others. The aim of this study was to quantify the thiocyanate-induced vasomotor response in aortic tissue and further to examine the potential of melatonin in affecting the generated vasoreactivity. Aortic rings of adult male normotensive Wistar rats were cut into 4-mm rings. Following the administration of thiocyanate in various concentrations, vasomotor response of aortic vessel segments was measured. To assess the effect of melatonin on vasomotor activity, organ bath concentrations were modulated from 60 to 360 pM, which corresponds to physiologic plasma up to the levels of patients with regular oral intake of 3 mg of melatonin as a supplement. Thirty-six rat aortic rings were studied. When exposed to thiocyanate, vessel segments revealed vasoconstriction in a concentration-dependent manner. In rings which were preincubated with melatonin at a concentration of 360 pM, a 56.5% reduction of effect size could be achieved (4.09 ± 1.22 mN versus 9.41 ± 1.74 mN, P < 0.0001). Additionally, administration of 360 pM melatonin at a norepinephrine concentration of 80 mM resulted in a relaxation of 10.9 ± 2.2%. The vasodilatatory effect of melatonin was significantly reduced to 1.3 ± 0.5% when concentration of norepinephrine was doubled (P < 0.002). This study indicates that vessel segments that were exposed to thiocyanate responded with a dose-dependent vasoconstriction. The effect could be markedly attenuated in segments preincubated in melatonin.
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277
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Klimentova J, Cebova M, Barta A, Matuskova Z, Vrankova S, Rehakova R, Kovacsova M, Pechanova O. Effect of melatonin on blood pressure and nitric oxide generation in rats with metabolic syndrome. Physiol Res 2017; 65:S373-S380. [PMID: 27775422 DOI: 10.33549/physiolres.933436] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Melatonin, a multitasking indolamine, seems to be involved in a variety of physiological and metabolic processes via both receptor-mediated and receptor-independent mechanisms. The aim of our study was to find out whether melatonin can affect blood pressure (BP), nitric oxide synthase (NOS) activity, eNOS and nNOS protein expressions in rats with metabolic syndrome (SHR/cp). Rats were divided into four groups: 6-week-old male WKY andSHR/cp and age-matched WKY and SHR/cp treated with melatonin (10 mg/kg/day) for 3 weeks. BP was measured by tail-cuff plethysmography. NOS activity, eNOS and nNOS protein expressions were determined in the heart, aorta, brain cortex and cerebellum. MT(1) receptors were analyzed in the brain cortex and cerebellum. In SHR/cp rats, BP was decreased after melatonin treatment. In the same group, melatonin did not affect NOS activity and eNOS protein expression in the heart and aorta, while it increased both parameters in the brain cortex and cerebellum. Interestingly, melatonin elevated MT1 protein expression in the cerebellum. Neuronal NOS protein expression was not changed within the groups. In conclusion, increased NOS activity/eNOS upregulation in particular brain regions may contribute partially to BP decrease in SHR/cp rats after melatonin treatment. Participation of MT(1) receptors in this melatonin action may be supposed.
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Affiliation(s)
- J Klimentova
- Institute of Normal and Pathological Physiology, Slovak Academy of Sciences, Bratislava, Slovak Republic.
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278
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Melatonin attenuates titanium particle-induced osteolysis via activation of Wnt/β-catenin signaling pathway. Acta Biomater 2017; 51:513-525. [PMID: 28088671 DOI: 10.1016/j.actbio.2017.01.034] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 01/05/2017] [Accepted: 01/10/2017] [Indexed: 12/28/2022]
Abstract
Wear debris-induced inhibition of bone regeneration and extensive bone resorption were common features in peri-prosthetic osteolysis (PPO). Here, we investigated the effect of melatonin on titanium particle-stimulated osteolysis in a murine calvariae model and mouse-mesenchymal-stem cells (mMSCs) culture system. Melatonin inhibited titanium particle-induced osteolysis and increased bone formation at osteolytic sites, confirmed by radiological and histomorphometric data. Furthermore, osteoclast numbers decreased dramatically in the low- and high-melatonin administration mice, as respectively, compared with the untreated animals. Melatonin alleviated titanium particle-induced depression of osteoblastic differentiation and mineralization in mMSCs. Mechanistically, melatonin was found to reduce the degradation of β-catenin, levels of which were decreased in presence of titanium particles both in vivo and in vitro. To further ensure whether the protective effect of melatonin was mediated by the Wnt/β-catenin signaling pathway, ICG-001, a selective β-catenin inhibitor, was added to the melatonin-treated groups and was found to attenuate the effect of melatonin on mMSC mineralization. We also demonstrated that melatonin modulated the balance between receptor activator of nuclear factor kappa-B ligand and osteoprotegerin via activation of Wnt/β-catenin signaling pathway. These findings strongly suggest that melatonin represents a promising candidate in the treatment of PPO. STATEMENT OF SIGNIFICANCE Peri-prosthetic osteolysis, initiated by wear debris-induced inhibition of bone regeneration and extensive bone resorption, is the leading cause for implant failure and reason for revision surgery. In the current study, we demonstrated for the first time that melatonin can induce bone regeneration and reduce bone resorption at osteolytic sites caused by titanium-particle stimulation. These effects might be mediated by activating Wnt/β-catenin signaling pathway and enhancing osteogenic differentiation. Meanwhile, the ability of melatonin to modulate the balance between receptor activator of nuclear factor kappa-B ligand and osteoprotegerin mediated by Wnt/β-catenin signaling pathway, thereby suppressing osteoclastogenesis, may be implicated in the protective effects of melatonin on titanium-particle-induced bone resorption. These results suggested that melatonin can be considered as a promising therapeutic agent for the prevention and treatment of peri-prosthetic osteolysis.
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279
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González-Fernández B, Sánchez DI, Crespo I, San-Miguel B, Álvarez M, Tuñón MJ, González-Gallego J. Inhibition of the SphK1/S1P signaling pathway by melatonin in mice with liver fibrosis and human hepatic stellate cells. Biofactors 2017; 43:272-282. [PMID: 27801960 DOI: 10.1002/biof.1342] [Citation(s) in RCA: 42] [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: 05/04/2016] [Revised: 09/07/2016] [Accepted: 10/03/2016] [Indexed: 01/02/2023]
Abstract
The sphingosine kinase 1/sphingosine 1-phosphate (SphK1/S1P) system is involved in different pathological processes, including fibrogenesis. Melatonin abrogates activation of hepatic stellate cells (HSCs) and attenuates different profibrogenic pathways in animal models of fibrosis, but it is unknown if protection associates with its inhibitory effect on the SphK1/S1P axis. Mice in treatment groups received carbon tetrachloride (CCl4 ) 5 μL g-1 body wt i.p. twice a week for 4 or 6 weeks. Melatonin was given at 5 or 10 mg kg-1 day-1 i.p, beginning 2 weeks after the start of CCl4 administration. At both 4 and 6 weeks following CCl4 treatment, liver mRNA levels, protein concentration and immunohistochemical labelling for SphK1 increased significantly. S1P production, and expression of S1P receptor (S1PR)1, S1PR3 and acid sphingomyelinase (ASMase) were significantly elevated. However, there was a decreased expression of S1PR2 and S1P lyase (S1PL). Melatonin attenuated liver fibrosis, as shown by a significant inhibition of the expression of α-smooth muscle actin (α-SMA), transforming growth factor (TGF)-β and collagen (Col) Ι. Furthermore, melatonin inhibited S1P production, lowered expression of SphK1, S1PR1, SP1R3, and ASMase, and increased expression of S1PL. Melatonin induced a reversal of activated human HSCs cell line LX2, as evidenced by a reduction in α-SMA, TGF-β, and Col I expression. Melatonin-treated cells also exhibited an inhibition of the SphK1/S1P axis. Antifibrogenic effect of SphK1 inhibition was confirmed by treatment of LX2 cells with PF543. Abrogation of the lipid signaling pathway by the indole reveals novel molecular pathways that may account for the protective effect of melatonin in liver fibrogenesis. © 2016 BioFactors, 43(2):272-282, 2017.
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Affiliation(s)
| | - Diana I Sánchez
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
| | - Irene Crespo
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), León, Spain
| | | | | | - María J Tuñón
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), León, Spain
| | - Javier González-Gallego
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), León, Spain
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280
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Lee MS, Yin TC, Sung PH, Chiang JY, Sun CK, Yip HK. Melatonin enhances survival and preserves functional integrity of stem cells: A review. J Pineal Res 2017; 62. [PMID: 27736010 DOI: 10.1111/jpi.12372] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 10/10/2016] [Indexed: 12/22/2022]
Abstract
Despite state-of-the-art pharmaceutical regimens, continuous improvements in diagnostic techniques as well as refinements in equipment and interventional procedures, many diseases remain refractory to conventional therapies. Recent advances in stem cell (SC) biology have opened an avenue to exploring its therapeutic potential in various disease entities, especially those that are ischemia-related and refractory to conventional treatment. A number of experimental studies and clinical trials have already demonstrated promising outcomes. On the other hand, SC therapy is associated with major problems. For instance, ischemia, inflammation, and oxidative stress are some of the factors unfavorable for SC survival once SCs are implanted into the ischemic area in an attempt to enhance tissue regeneration and restore organ function. Melatonin, which is originally derived from pineal gland in the regulation of human circadian rhythms and sleep, is a potent free radical scavenger and metal chelator with the capacity to alleviate oxidative stress and inflammatory reactions as well as stabilizing cell membranes. Accumulating data have demonstrated that melatonin-supported SC therapy is superior to SC alone for improving ischemia-related organ dysfunction. In this review, we describe and interpret the potential role of melatonin in sustaining the survival and preserving the functional integrity of SC.
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Affiliation(s)
- Mel S Lee
- Department of Orthopedics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Tsung-Cheng Yin
- Department of Orthopedics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Pei-Hsun Sung
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - John Y Chiang
- Department of Computer Science and Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
- Department of Healthcare Administration and Medical Informatics, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Cheuk-Kwan Sun
- Department of Emergency Medicine, E-Da Hospital, I-Shou University School of Medicine for International Students, Kaohsiung, Taiwan
| | - Hon-Kan Yip
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
- Center for Shockwave Medicine and Tissue Engineering, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
- Department of Nursing, Asia University, Taichung, Taiwan
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281
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Lee JH, Han YS, Lee SH. Potentiation of biological effects of mesenchymal stem cells in ischemic conditions by melatonin via upregulation of cellular prion protein expression. J Pineal Res 2017; 62. [PMID: 28095625 DOI: 10.1111/jpi.12385] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 01/11/2017] [Indexed: 12/18/2022]
Abstract
Mesenchymal stem cells (MSCs) are promising candidates for stem cell-based therapy in ischemic diseases. However, ischemic injury induces pathophysiological conditions, such as oxidative stress and inflammation, which diminish therapeutic efficacy of MSC-based therapy by reducing survival and functionality of transplanted MSCs. To overcome this problem, we explored the effects of melatonin on the proliferation, resistance to oxidative stress, and immunomodulatory properties of MSCs. Treatment with melatonin enhanced MSC proliferation and self-renewal via upregulation of cellular prion protein (PrPC ) expression. Melatonin diminished the extent of MSC apoptosis in oxidative stress conditions by regulating the levels of apoptosis-associated proteins, such as BCL-2, BAX, PARP-1, and caspase-3, in a PrPC -dependent manner. In addition, melatonin regulated the immunomodulatory effects of MSCs via the PrPC -IDO axis. In a murine hind-limb ischemia model, melatonin-stimulated MSCs improved the blood flow perfusion, limb salvage, and vessel regeneration by lowering the extent of apoptosis of affected local cells and transplanted MSCs as well as by reducing infiltration of macrophages. These melatonin-mediated therapeutic effects were inhibited by silencing of PrPC expression. Our findings for the first time indicate that melatonin promotes MSC functionality and enhances MSC-mediated neovascularization in ischemic tissues through the upregulation of PrPC expression. In conclusion, melatonin-treated MSCs could provide a therapeutic strategy for vessel regeneration in ischemic disease, and the targeting of PrPC levels may prove instrumental for MSC-based therapies.
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Affiliation(s)
- Jun Hee Lee
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Yong-Seok Han
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Sang Hun Lee
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul, Korea
- Departments of Biochemistry, Soonchunhyang University College of Medicine, Cheonan, Korea
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282
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Kim YD, Hwang SL, Lee EJ, Kim HM, Chung MJ, Elfadl AK, Lee SE, Nedumaran B, Harris RA, Jeong KS. Melatonin ameliorates alcohol-induced bile acid synthesis by enhancing miR-497 expression. J Pineal Res 2017; 62. [PMID: 28095641 DOI: 10.1111/jpi.12386] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 01/11/2017] [Indexed: 12/12/2022]
Abstract
Alcoholic liver disease is a major cause of chronic liver disease worldwide, and cannabinoid receptor type 1 (CB1R) is involved in a diverse metabolic diseases. B-cell translocation gene 2 (BTG2) and yin yang 1 (YY1) are a potent regulator of biological conditions. Melatonin plays a crucial role in regulating diverse physiological functions and metabolic homeostasis. MicroRNAs are key regulators of various biological processes. Herein, we demonstrate that melatonin improves bile acid synthesis in the liver of alcohol-fed mice by controlling miR-497 expression. The level of bile acid and the expression of Cb1r, Btg2, Yy1, and bile acid synthetic enzymes were significantly elevated in the livers of Lieber-DeCarli alcohol-fed mice. The overexpression of Btg2 enhanced Yy1 gene expression and bile acid production, whereas disrupting the CB1R-BTG2-YY1 cascade protected against the bile acid synthesis caused by alcohol challenge. We identified an alcohol-mediated YY1 binding site on the cholesterol 7α-hydroxylase (Cyp7a1) gene promoter using promoter deletion analysis and chromatin immunoprecipitation assays. Notably, melatonin attenuated the alcohol-stimulated induction of Btg2, Yy1 mRNA levels and bile acid production by promoting miR-497. Overexpression of a miR-497 mimic dramatically diminished the increase of Btg2 and Yy1 gene expression as well as bile acid production by alcohol, whereas this phenomenon was reversed by miR-497 inhibitor. These results demonstrate that the upregulation of miR-497 by melatonin represses alcohol-induced bile acid synthesis by attenuating the BTG2-YY1 signaling pathway. The melatonin-miR497 signaling network may provide novel therapeutic targets for the treatment of hepatic metabolic dysfunction caused by the alcohol-dependent pathway.
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Affiliation(s)
- Yong Deuk Kim
- Department of Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Stem Cell Therapeutic Research Institute, Kyungpook National University, Daegu, Korea
- School of Applied Biosciences, Kyungpook National University, Daegu, Korea
| | - Seung-Lark Hwang
- School of Applied Biosciences, Kyungpook National University, Daegu, Korea
| | - Eun-Joo Lee
- Department of Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Stem Cell Therapeutic Research Institute, Kyungpook National University, Daegu, Korea
| | - Hyeong-Mi Kim
- Department of Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Stem Cell Therapeutic Research Institute, Kyungpook National University, Daegu, Korea
| | - Myung-Jin Chung
- Department of Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Stem Cell Therapeutic Research Institute, Kyungpook National University, Daegu, Korea
| | - Ahmed K Elfadl
- Department of Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Stem Cell Therapeutic Research Institute, Kyungpook National University, Daegu, Korea
| | - Sung-Eun Lee
- School of Applied Biosciences, Kyungpook National University, Daegu, Korea
| | - Balachandar Nedumaran
- Department of Surgery, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Robert A Harris
- Roudebush VA Medical Center and the Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Kyu-Shik Jeong
- Department of Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Stem Cell Therapeutic Research Institute, Kyungpook National University, Daegu, Korea
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283
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Li W, Wang Z, Chen Y, Wang K, Lu T, Ying F, Fan M, Li Z, Wu J. Melatonin treatment induces apoptosis through regulating the nuclear factor-κB and mitogen-activated protein kinase signaling pathways in human gastric cancer SGC7901 cells. Oncol Lett 2017; 13:2737-2744. [PMID: 28454460 DOI: 10.3892/ol.2017.5785] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 12/09/2016] [Indexed: 12/13/2022] Open
Abstract
Melatonin, which is synthesized by the pineal gland and released into the blood, exhibits antitumor properties. However, the mechanisms underlying these effects, particularly in stomach cancer, remain unknown. In the present study, the effect of melatonin on the nuclear factor (NF)-κB signaling pathway and the mitogen-activated protein kinase signaling pathway, involving p38 and c-Jun-N-terminal kinase (JNK), were investigated in SGC7901 gastric cancer cells. In addition, the effect of melatonin on the survival, migration and apoptosis of these cells was investigated in vitro in order to evaluate the use of melatonin for the treatment of gastric cancer. The results of the present study revealed that melatonin decreased the viability and migration of SGC7901 cells. Furthermore, melatonin induced apoptosis. Melatonin was identified to elevate the expression levels of phosphorylated (p)-p38 and p-JNK protein, and decrease the expression level of nucleic p-p65. These results suggest that the protein levels of p65, p38 and JNK are associated with the survival of SGC7901 cells following treatment with melatonin. The optimal concentration of melatonin was demonstrated to be 2 mM, which significantly induced apoptosis following a 24 h treatment period. These findings suggest that conflicting growth signals in cells may inhibit the efficacy of melatonin in the treatment of gastric cancer. Therefore, adjunct therapy would be required to improve the efficacy of melatonin in the treatment of cancer.
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Affiliation(s)
- Weimin Li
- Department of Gastroenterology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang 310000, P.R. China.,Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Zhonglue Wang
- Department of Gastroenterology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang 310000, P.R. China
| | - Yina Chen
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Kaijing Wang
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China.,Department of Ultrasonography, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Ting Lu
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China.,Department of Gastroenterology, Ningbo Medical Center Lihuili Eastern Hospital, Ningbo, Zhejiang 315000, P.R. China
| | - Fei Ying
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China.,Department of Gastroenterology, Xianju People's Hospital, Taizhou, Zhejiang 317300, P.R. China
| | - Mengdi Fan
- Department of Endocrinology, Zhejiang University International Hospital, Hangzhou, Zhejiang 310000, P.R. China
| | - Zhiyin Li
- Department of Gastroenterology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang 310000, P.R. China
| | - Jiansheng Wu
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
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284
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Luengtrakoon K, Wannakasemsuk W, Vichitrananda V, Klanrit P, Hormdee D, Noisombut R, Chaiyarit P. Increased melatonin in oral mucosal tissue of oral lichen planus (OLP) patients: A possible link between melatonin and its role in oral mucosal inflammation. Arch Oral Biol 2017; 78:13-19. [PMID: 28189880 DOI: 10.1016/j.archoralbio.2017.02.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 02/03/2017] [Accepted: 02/05/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The existence of extra-pineal melatonin has been observed in various tissues. No prior studies of melatonin in human oral mucosal tissue under the condition of chronic inflammation have been reported. The aim of this study was to investigate the presence of melatonin in oral mucosal tissue of patients with oral lichen planus (OLP) which was considered as a chronic inflammatory immune-mediated disease causing oral mucosal damage and ulcerations. MATERIALS AND METHODS Sections from formalin-fixed and paraffin-embedded oral mucosal tissue of OLP patients (n=30), and control subjects (n=30) were used in this study. Immunohistochemical staining was performed and the semiquantitative scoring system was used to assess the levels of arylalkylamine-N-acetyltransferase (AANAT: a rate-limiting enzyme in the biosynthesis pathway of melatonin), melatonin, and melatonin receptor 1 (MT1) in oral mucosa of OLP patients and normal oral mucosa of control subjects. RESULTS AANAT, melatonin, and MT1were detected in oral mucosal tissue of OLP patients and control subjects. Immunostaining scores of AANAT, melatonin, and MT1 in oral mucosal tissue of OLP patients were significantly higher than those in control subjects (p=0.002, p<0.001, and p=0.031, respectively). CONCLUSIONS Increased levels of AANAT, melatonin, and MT1 in the inflamed oral mucosal tissue of OLP patients imply that chronic inflammation may induce the local biosynthesis of melatonin via AANAT, and may enhance the action of melatonin via MT1.
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Affiliation(s)
- Kirawut Luengtrakoon
- Dental Hospital, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand
| | | | | | - Poramaporn Klanrit
- Research Group of Chronic Inflammatory Oral Diseases and Systemic Diseases Associated with Oral Health, Khon Kaen University, Khon Kaen, Thailand; Department of Oral Diagnosis, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand
| | - Doosadee Hormdee
- Research Group of Chronic Inflammatory Oral Diseases and Systemic Diseases Associated with Oral Health, Khon Kaen University, Khon Kaen, Thailand; Department of Periodontology, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand
| | - Rajda Noisombut
- Department of Community Dentistry, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand
| | - Ponlatham Chaiyarit
- Research Group of Chronic Inflammatory Oral Diseases and Systemic Diseases Associated with Oral Health, Khon Kaen University, Khon Kaen, Thailand; Department of Oral Diagnosis, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand.
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285
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Zheng X, Pang B, Gu G, Gao T, Zhang R, Pang Q, Liu Q. Melatonin Inhibits Glioblastoma Stem-like cells through Suppression of EZH2-NOTCH1 Signaling Axis. Int J Biol Sci 2017; 13:245-253. [PMID: 28255276 PMCID: PMC5332878 DOI: 10.7150/ijbs.16818] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 12/27/2016] [Indexed: 12/17/2022] Open
Abstract
Glioblastoma stem-like cells (GSCs) play essential roles in glioma growth, radio- and chemo-resistance, and recurrence. Elimination of GSCs has therefore become a key strategy and challenge in glioblastoma therapy. Here, we show that melatonin, an indolamine derived from I-tryptophan, significantly inhibited viability and self-renewal ability of GSCs accompanied by a decrease of stem cell markers. We have identified EZH2-NOTCH1 signaling as the key signal pathway that regulated the effects of melatonin in the GSCs. Instead of transcriptionally silencing gene expression by generating a methylated epigenetic mark at histone 3 at lysine 27 (H3K27), EZH2 regulates NOTCH1 expression by directly binding to the NOTCH1 promoter. Moreover, correlation between the expressions of EZH2 and NOTCH intracellular domain 1 (NICD1) was observed in the clinical tumor samples, evidently supporting the existence of EZH2-NOTCH1 interaction in the gliomas and GSCs. Collectively, we demonstrated that melatonin, a potential tumor inhibitor, performs its function partly by suppressing GSC properties through EZH2-NOTCH1 signaling axis.
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Affiliation(s)
- Xiangrong Zheng
- Department of Neurosurgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Bo Pang
- Department of Neurosurgery, Qilu Hospital of Shandong University, Jinan 250012, Shandong, China
| | - Guangyan Gu
- Department of Histology and Embryology, Shandong University School of Medicine, Jinan, 250012, Shandong, China
| | - Taihong Gao
- Department of Neurosurgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Rui Zhang
- Department of Neurosurgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Qi Pang
- Department of Neurosurgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Qian Liu
- Department of Histology and Embryology, Shandong University School of Medicine, Jinan, 250012, Shandong, China
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286
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Reutrakul S, Siwasaranond N, Nimitphong H, Saetung S, Chirakalwasan N, Chailurkit LO, Srijaruskul K, Ongphiphadhanakul B, Thakkinstian A. Associations between nocturnal urinary 6-sulfatoxymelatonin, obstructive sleep apnea severity and glycemic control in type 2 diabetes. Chronobiol Int 2017; 34:382-392. [PMID: 28128991 DOI: 10.1080/07420528.2016.1278382] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Reduced nocturnal secretion of melatonin, a pineal hormone under circadian control, and obstructive sleep apnea have been both identified as risk factors for the development of type 2 diabetes mellitus. Whether they interact to impact glycemic control in patients with existing type 2 diabetes is not known. Therefore, this study explores the relationships between obstructive sleep apnea, melatonin and glycemic control in type 2 diabetes. As diabetic retinopathy may affect melatonin secretion, we also explore the relationship between retinopathy, melatonin and glycemic control. Fifty-six non-shift workers with type 2 diabetes, who were not using beta-blockers, participated. Most recent hemoglobin A1c (HbA1c) levels and the results of ophthalmologic examinations were obtained from medical records. Obstructive sleep apnea was diagnosed using an ambulatory device. Sleep duration and fragmentation were recorded by 7-day wrist actigraphy. The urinary 6-sulfatoxymelatonin/creatinine ratio, an indicator of nocturnal melatonin secretion, was measured in an overnight urine sample. Mediation analyses were applied to explore whether low nocturnal urinary 6-sulfatoxymelatonin/creatinine ratio could be a causal link between increasing obstructive sleep apnea severity [as measured by an Apnea Hypopnea Index (AHI)] and poorer glycemic control, and between the presence of retinopathy and glycemic control. AHI and HbA1c were log-scale (ln) transformed. Obstructive sleep apnea was found in 76.8%, and 25.5% had diabetic retinopathy. The median (interquartile range) of urinary 6-sulfatoxymelatonin/creatinine ratio was 12.3 (6.0, 20.1) ng/mg. Higher lnHbA1c significantly correlated with lower 6-sulfatoxymelatonin/creatinine ratio (p = 0.04) but was not directly associated with OSA severity. More severe obstructive sleep apnea (lnAHI, p = 0.01), longer diabetes duration (p = 0.02), retinopathy (p = 0.01) and insulin use (p = 0.03) correlated with lower urinary 6-sulfatoxymelatonin/creatinine ratio, while habitual sleep duration and fragmentation did not. A mediation analysis revealed that lnAHI negatively correlated with urinary 6-sulfatoxymelatonin/creatinine ratio (coefficient = -2.413, p = 0.03), and urinary 6-sulfatoxymelatonin/creatinine negatively associated with lnHbA1c (coefficient = -0.005, p = 0.02), after adjusting for covariates. Mediation analysis indicated that the effect of lnAHI on lnHbA1c was indirectly mediated by urinary 6-sulfatoxymelatonin/creatinine ratio (B = 0.013, 95% CI: 0.0006, 0.0505). In addition, having retinopathy was significantly associated with reduced nocturnal urinary 6-sulfatoxymelatonin/creatinine ratio, and an increase in HbA1c by 1.013% of its original value (B = -0.013, 95% CI: -0.038, -0.005). In conclusion, the presence and severity of obstructive sleep apnea as well as the presence of diabetic retinopathy were associated with lower nocturnal melatonin secretion, with an indirect adverse effect on glycemic control. Intervention studies are needed to determine whether melatonin supplementation may be beneficial in type 2 diabetes patients with obstructive sleep apnea.
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Affiliation(s)
- Sirimon Reutrakul
- a Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital , Mahidol University , Bangkok , Thailand
| | - Nantaporn Siwasaranond
- a Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital , Mahidol University , Bangkok , Thailand
| | - Hataikarn Nimitphong
- a Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital , Mahidol University , Bangkok , Thailand
| | - Sunee Saetung
- a Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital , Mahidol University , Bangkok , Thailand
| | - Naricha Chirakalwasan
- b Division of Pulmonary and Critical Care Medicine, Department of Medicine, Faculty of Medicine , Chulalongkorn University , Bangkok , Thailand.,c Excellence Center for Sleep Disorders , King Chulalongkorn Memorial Hospital, Thai Red Cross Society , Bangkok , Thailand
| | - La-Or Chailurkit
- a Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital , Mahidol University , Bangkok , Thailand
| | - Kriangsuk Srijaruskul
- a Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital , Mahidol University , Bangkok , Thailand
| | - Boonsong Ongphiphadhanakul
- a Division of Endocrinology and Metabolism, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital , Mahidol University , Bangkok , Thailand
| | - Ammarin Thakkinstian
- d Section for Clinical Epidemiology and Biostatistics, Faculty of Medicine , Ramathibodi Hospital, Mahidol University , Bangkok , Thailand
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287
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Kalmykova O, Pustovalov A, Vareniuk I, Dzerzhynsky M. Effect of melatonin different time administration on the development of diet-induced obesity in rats. ACTA ACUST UNITED AC 2017. [DOI: 10.17721/2616_6410.2017.23.20-27] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In recent years much attention has been paid for study of the melatonin use possibilities for improving obesity comorbidities. The aim of our study was to determine the influence of melatonin different time treatment on body weight changes of dietinduced obesity in rats. The administration by gavage of melatonin in dose 30 mg/kg for 7 weeks had the potential to decrease visceral fat weight, Lee index (both after morning and evening treatment) and body weight gain rate (only after evening dose).
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Affiliation(s)
| | | | - I. Vareniuk
- Taras Shevchenko National University of Kyiv
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288
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Chumboatong W, Thummayot S, Govitrapong P, Tocharus C, Jittiwat J, Tocharus J. Neuroprotection of agomelatine against cerebral ischemia/reperfusion injury through an antiapoptotic pathway in rat. Neurochem Int 2017; 102:114-122. [DOI: 10.1016/j.neuint.2016.12.011] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 12/05/2016] [Accepted: 12/20/2016] [Indexed: 11/28/2022]
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289
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Shukla M, Govitrapong P, Boontem P, Reiter RJ, Satayavivad J. Mechanisms of Melatonin in Alleviating Alzheimer's Disease. Curr Neuropharmacol 2017; 15:1010-1031. [PMID: 28294066 PMCID: PMC5652010 DOI: 10.2174/1570159x15666170313123454] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 02/10/2017] [Accepted: 03/09/2017] [Indexed: 02/07/2023] Open
Abstract
Alzheimer's disease (AD) is a chronic, progressive and prevalent neurodegenerative disease characterized by the loss of higher cognitive functions and an associated loss of memory. The thus far "incurable" stigma for AD prevails because of variations in the success rates of different treatment protocols in animal and human studies. Among the classical hypotheses explaining AD pathogenesis, the amyloid hypothesis is currently being targeted for drug development. The underlying concept is to prevent the formation of these neurotoxic peptides which play a central role in AD pathology and trigger a multispectral cascade of neurodegenerative processes post-aggregation. This could possibly be achieved by pharmacological inhibition of β- or γ-secretase or stimulating the nonamyloidogenic α-secretase. Melatonin the pineal hormone is a multifunctioning indoleamine. Production of this amphiphilic molecule diminishes with advancing age and this decrease runs parallel with the progression of AD which itself explains the potential benefits of melatonin in line of development and devastating consequences of the disease progression. Our recent studies have revealed a novel mechanism by which melatonin stimulates the nonamyloidogenic processing and inhibits the amyloidogenic processing of β-amyloid precursor protein (βAPP) by stimulating α -secretases and consequently down regulating both β- and γ-secretases at the transcriptional level. In this review, we discuss and evaluate the neuroprotective functions of melatonin in AD pathogenesis, including its role in the classical hypotheses in cellular and animal models and clinical interventions in AD patients, and suggest that with early detection, melatonin treatment is qualified to be an anti-AD therapy.
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Affiliation(s)
- Mayuri Shukla
- Chulabhorn Graduate Institute, Chulabhorn Royal Academy, 54 Kamphaeng Phet 6 Road, Lak Si, Bangkok10210, Thailand
| | - Piyarat Govitrapong
- Chulabhorn Graduate Institute, Chulabhorn Royal Academy, 54 Kamphaeng Phet 6 Road, Lak Si, Bangkok10210, Thailand
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakornpathom 73170, Thailand
| | - Parichart Boontem
- Chulabhorn Graduate Institute, Chulabhorn Royal Academy, 54 Kamphaeng Phet 6 Road, Lak Si, Bangkok10210, Thailand
| | - Russel J. Reiter
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Jutamaad Satayavivad
- Chulabhorn Research Institute and Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok10210, Thailand
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290
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Wu J, Liu Z, Su J, Pan N, Song Q. Anti-inflammatory activity of 3β-hydroxycholest-5-en-7-one isolated from Hippocampus trimaculatus leach via inhibiting iNOS, TNF-α, and 1L-1β of LPS induced RAW 264.7 macrophage cells. Food Funct 2017; 8:788-795. [DOI: 10.1039/c6fo01154c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Hippocampus trimaculatus leach has been widely used in beverage and herbal medicine fabrication.
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Affiliation(s)
- Jingna Wu
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering at Huaqiao University
- Xiamen
- P. R. China
- Fisheries Research Institute of Fujian
| | - Zhiyu Liu
- Fisheries Research Institute of Fujian
- Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources/Key Laboratory of Cultivation and High Value Utilization of Marine Organisms in Fujian Province
- Xiamen
- P. R. China
| | - Jie Su
- Fisheries Research Institute of Fujian
- Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources/Key Laboratory of Cultivation and High Value Utilization of Marine Organisms in Fujian Province
- Xiamen
- P. R. China
| | - Nan Pan
- Fisheries Research Institute of Fujian
- Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources/Key Laboratory of Cultivation and High Value Utilization of Marine Organisms in Fujian Province
- Xiamen
- P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering at Huaqiao University
- Xiamen
- P. R. China
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291
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Moreno-Fernandez J, Diaz-Castro J, Alférez MJM, Nestares T, Ochoa JJ, Sánchez-Alcover A, López-Aliaga I. Fermented goat milk consumption improves melatonin levels and influences positively the antioxidant status during nutritional ferropenic anemia recovery. Food Funct 2016; 7:834-42. [PMID: 26662041 DOI: 10.1039/c5fo01299f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of the current study was to assess the influence of fermented goat or cow milk on melatonin levels and antioxidant status and during anemia recovery. Eighty male Wistar rats were placed on a pre-experimental period of 40 days and randomly divided into two groups, a control group receiving normal-Fe diet (45 mg kg(-1)) and the Fe-deficient group receiving low-Fe diet (5 mg kg(-1)). Then, the rats were fed with fermented goat or cow milk-based diets with a normal-Fe content or Fe-overload (450 mg kg(-1)) for 30 days. After 30 days of feeding the fermented milks, the total antioxidant status (TAS) was higher in both groups of animals fed fermented goat milk with the normal-Fe content. Plasma and urine 8-OHdG were lower in control and anemic rats fed fermented goat milk. Melatonin and corticosterone increased in the anemic groups during Fe replenishment with both fermented milks. Urine isoprostanes were lower in both groups fed fermented goat milk. Lipid and protein oxidative damage were higher in all tissues with fermented cow milk. During anemia instauration, an increase in melatonin was observed, a fact that would improve the energy metabolism and impaired inflammatory signaling, however, during anemia recovery, fermented goat milk had positive effects on melatonin and TAS, even in the case of Fe-overload, limiting the evoked oxidative damage.
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Affiliation(s)
- Jorge Moreno-Fernandez
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Javier Diaz-Castro
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - M José M Alférez
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Teresa Nestares
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Julio J Ochoa
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Ana Sánchez-Alcover
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Inmaculada López-Aliaga
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
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292
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Liu F, Wang X. Diagnosis and treatment of epilepsy and sleep apnea comorbidity. Expert Rev Neurother 2016; 17:475-485. [PMID: 27866428 DOI: 10.1080/14737175.2017.1262259] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Feng Liu
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing, China
| | - Xuefeng Wang
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing, China
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293
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Sun H, Wang X, Chen J, Song K, Gusdon AM, Li L, Bu L, Qu S. Melatonin improves non-alcoholic fatty liver disease via MAPK-JNK/P38 signaling in high-fat-diet-induced obese mice. Lipids Health Dis 2016; 15:202. [PMID: 27876064 PMCID: PMC5120511 DOI: 10.1186/s12944-016-0370-9] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 11/10/2016] [Indexed: 01/21/2023] Open
Abstract
Background Melatonin can regulate lipid metabolism, increase insulin sensitivity, regulate glucose metabolism and reduce body weight. This study is aimed to determine the effects and mechanism of action of melatonin on non-alcoholic fatty liver disease (NAFLD) in high-fat-diet (HFD) induced obese mice. Methods NAFLD was induced by HFD in C57BL/6 mice. A total of 24 mice were randomly assigned to 4 groups. Groups A and B were fed with HFD for 36 weeks while groups C and D were fed with a regular diet (RD). During the last 12 weeks, Groups A and C were treated with 10 mg/kg melatonin while Groups B and D were treated with water in the same volume by intragastric administration. Body and liver weight, blood glucose, serum transaminases and lipid levels, and markers of hepatic inflammation were measured. Histological analyses were also performed on liver tissue. Results After 12 weeks of treatment with melatonin, body weights (Group A: before 53.11 ± 0.72 vs after 12w treatment 39.48 ± 0.74) and liver weights (A 1.93 ± 0.09 g vs B 2.92 ± 0.19 g vs C 1.48 ± 0.09 g vs D 1.49 ± 0.10 g), fasting plasma glucose, alanine transaminase (A 24.33 ± 11.90 IU/L vs B 60.80 ± 10.18 IU/L vs C 13.01 ± 3.49 IU/L vs D 16.62 ± 2.00 IU/L), and low-density cholesterol (A 0.24 ± 0.06 mmol/L vs B 1.57 ± 0.10 mmol/L vs C 0.28 ± 0.06 mmol/L vs D 0.29 ± 0.03 mmol/L) were significantly decreased in HFD mice. HFD fed mice treated with melatonin showed significantly less liver steatosis. Treatment of HFD fed mice with melatonin led to a significant decrease in the expression of TNF-α, IL-1β, and IL-6 measured using quantitative real-time polymerase chain reaction (qRT-PCR). HFD fed mice demonstrated increased phosphorylation of P38 and JNK1/2, which was reduced by melatonin treatment. Conclusions The study concluded that melatonin could improve NAFLD by decreasing body weight and reduce inflammation in HFD induced obese mice by modulating the MAPK-JNK/P38 signaling pathway.
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Affiliation(s)
- Hang Sun
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Xingchun Wang
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Jiaqi Chen
- Nanjing Medical University, Nanjing, Jiangsu, 210029, China
| | - Kexiu Song
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Aaron M Gusdon
- Department of Neurology, Weill Cornell Medical College, New York, NY, 10065, USA
| | - Liang Li
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Le Bu
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Shen Qu
- Department of Endocrinology and Metabolism, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China.
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294
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Kudová J, Vašíček O, Číž M, Kubala L. Melatonin promotes cardiomyogenesis of embryonic stem cells via inhibition of HIF-1α stabilization. J Pineal Res 2016; 61:493-503. [PMID: 27601067 DOI: 10.1111/jpi.12366] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 09/02/2016] [Indexed: 12/13/2022]
Abstract
Melatonin, a molecule involved in the regulation of circadian rhythms, has protective effects against myocardial injuries. However, its capability to regulate the maturation of cardiac progenitor cells is unclear. Recently, several studies have shown that melatonin inhibits the stabilization of hypoxia-inducible factors (HIFs), important signaling molecules with cardioprotective effects. In this study, by employing differentiating mouse embryonic stem cells, we report that melatonin significantly upregulated the expression of cardiac cell-specific markers (myosin heavy chains six and seven) as well as the percentage of myosin heavy chain-positive cells. Importantly, melatonin decreased HIF-1α stabilization and transcriptional activity and, in contrast, induced HIF-2α stabilization. Interestingly, the deletion of HIF-1α completely inhibited the pro-cardiomyogenic effect of melatonin as well as the melatonin-mediated HIF-2α stabilization. Moreover, melatonin increased Sirt-1 levels in a HIF-1α-dependent manner. Taken together, we provide new evidence of a time-specific inhibition of HIF-1α stabilization as an essential feature of melatonin-induced cardiomyogenesis and unexpected different roles of HIF-1α stabilization during various stages of cardiac development. These results uncover new mechanisms underlying the maturation of cardiac progenitor cells and can help in the development of novel strategies for using melatonin in cardiac regeneration therapy.
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Affiliation(s)
- Jana Kudová
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Ondřej Vašíček
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic
- International Clinical Research Center, Centre of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic
| | - Milan Číž
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic.
- International Clinical Research Center, Centre of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic.
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295
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Scheuer C, Pommergaard HC, Rosenberg J, Gögenur I. Dose dependent sun protective effect of topical melatonin: A randomized, placebo-controlled, double-blind study. J Dermatol Sci 2016; 84:178-185. [DOI: 10.1016/j.jdermsci.2016.08.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 04/12/2016] [Accepted: 08/09/2016] [Indexed: 11/16/2022]
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296
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Coto-Montes A, Boga JA, Tan DX, Reiter RJ. Melatonin as a Potential Agent in the Treatment of Sarcopenia. Int J Mol Sci 2016; 17:ijms17101771. [PMID: 27783055 PMCID: PMC5085795 DOI: 10.3390/ijms17101771] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 10/17/2016] [Accepted: 10/17/2016] [Indexed: 12/31/2022] Open
Abstract
Considering the increased speed at which the world population is aging, sarcopenia could become an epidemic in this century. This condition currently has no means of prevention or treatment. Melatonin is a highly effective and ubiquitously acting antioxidant and free radical scavenger that is normally produced in all organisms. This molecule has been implicated in a huge number of biological processes, from anticonvulsant properties in children to protective effects on the lung in chronic obstructive pulmonary disease. In this review, we summarize the data which suggest that melatonin may be beneficial in attenuating, reducing or preventing each of the symptoms that characterize sarcopenia. The findings are not limited to sarcopenia, but also apply to osteoporosis-related sarcopenia and to age-related neuromuscular junction dysfunction. Since melatonin has a high safety profile and is drastically reduced in advanced age, its potential utility in the treatment of sarcopenic patients and related dysfunctions should be considered.
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Affiliation(s)
- Ana Coto-Montes
- Department of Morphology and Cellular Biology, Medicine Faculty, University of Oviedo, Julian Claveria, s/n, Oviedo 33006, Spain.
- Department of Cellular and Structural Biology, UTHSCSA, San Antonio, TX 78229, USA.
| | - Jose A Boga
- Department of Cellular and Structural Biology, UTHSCSA, San Antonio, TX 78229, USA.
- Service of Microbiology, Hospital Universitario Central de Asturias, Avenida de Roma, s/n, Oviedo 33011, Spain.
| | - Dun X Tan
- Department of Cellular and Structural Biology, UTHSCSA, San Antonio, TX 78229, USA.
| | - Russel J Reiter
- Department of Cellular and Structural Biology, UTHSCSA, San Antonio, TX 78229, USA.
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297
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Dissecting Candida albicans Infection from the Perspective of C. albicans Virulence and Omics Approaches on Host-Pathogen Interaction: A Review. Int J Mol Sci 2016; 17:ijms17101643. [PMID: 27763544 PMCID: PMC5085676 DOI: 10.3390/ijms17101643] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/15/2016] [Accepted: 09/19/2016] [Indexed: 02/06/2023] Open
Abstract
Candida bloodstream infections remain the most frequent life-threatening fungal disease, with Candida albicans accounting for 70% to 80% of the Candida isolates recovered from infected patients. In nature, Candida species are part of the normal commensal flora in mammalian hosts. However, they can transform into pathogens once the host immune system is weakened or breached. More recently, mortality attributed to Candida infections has continued to increase due to both inherent and acquired drug resistance in Candida, the inefficacy of the available antifungal drugs, tedious diagnostic procedures, and a rising number of immunocompromised patients. Adoption of animal models, viz. minihosts, mice, and zebrafish, has brought us closer to unraveling the pathogenesis and complexity of Candida infection in human hosts, leading towards the discovery of biomarkers and identification of potential therapeutic agents. In addition, the advancement of omics technologies offers a holistic view of the Candida-host interaction in a non-targeted and non-biased manner. Hence, in this review, we seek to summarize past and present milestone findings on C. albicans virulence, adoption of animal models in the study of C. albicans infection, and the application of omics technologies in the study of Candida–host interaction. A profound understanding of the interaction between host defense and pathogenesis is imperative for better design of novel immunotherapeutic strategies in future.
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298
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Prieto-Domínguez N, Ordóñez R, Fernández A, Méndez-Blanco C, Baulies A, Garcia-Ruiz C, Fernández-Checa JC, Mauriz JL, González-Gallego J. Melatonin-induced increase in sensitivity of human hepatocellular carcinoma cells to sorafenib is associated with reactive oxygen species production and mitophagy. J Pineal Res 2016; 61:396-407. [PMID: 27484637 PMCID: PMC5018464 DOI: 10.1111/jpi.12358] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 07/29/2016] [Indexed: 12/13/2022]
Abstract
Effects of sorafenib in hepatocellular carcinoma (HCC) are frequently transient due to tumor-acquired resistance, a phenotype that could be targeted by other molecules to reduce this adaptive response. Because melatonin is known to exert antitumor effects in HCC cells, this study investigated whether and how melatonin reduces resistance to sorafenib. Susceptibility to sorafenib (10 nmol/L to 50 μmol/L) in the presence of melatonin (1 and 2 mmol/L) was assessed in HCC cell lines HepG2, HuH7, and Hep3B. Cell viability was reduced by sorafenib from 1 μmol/L in HepG2 or HuH7 cells, and 2.5 μmol/L in Hep3B cells. Co-administration of melatonin and sorafenib exhibited a synergistic cytotoxic effect on HepG2 and HuH7 cells, while Hep3B cells displayed susceptibility to doses of sorafenib that had no effect when administrated alone. Co-administration of 2.5 μmol/L sorafenib and 1 mmol/L melatonin induced apoptosis in Hep3B cells, increasing PARP hydrolysis and BAX expression. We also observed an early colocalization of mitochondria with lysosomes, correlating with the expression of mitophagy markers PINK1 and Parkin and a reduction of mitofusin-2 and mtDNA compared with sorafenib administration alone. Moreover, increased reactive oxygen species production and mitochondrial membrane depolarization were elicited by drug combination, suggesting their contribution to mitophagy induction. Interestingly, Parkin silencing by siRNA to impair mitophagy significantly reduced cell killing, PARP cleavage, and BAX expression. These results demonstrate that the pro-oxidant capacity of melatonin and its impact on mitochondria stability and turnover via mitophagy increase sensitivity to the cytotoxic effect of sorafenib.
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Affiliation(s)
- Néstor Prieto-Domínguez
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
| | - Raquel Ordóñez
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
| | - Anna Fernández
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
| | - Carolina Méndez-Blanco
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
| | - Anna Baulies
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
- Department of Cell Death and Proliferation, Institute of Biomedical Research of Barcelona (IIBB), Consejo Superior Investigaciones Científicas (CSIC) and Liver Unit-Hospital Clinic, Barcelona, Spain
| | - Carmen Garcia-Ruiz
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
- Department of Cell Death and Proliferation, Institute of Biomedical Research of Barcelona (IIBB), Consejo Superior Investigaciones Científicas (CSIC) and Liver Unit-Hospital Clinic, Barcelona, Spain
| | - José C Fernández-Checa
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
- Department of Cell Death and Proliferation, Institute of Biomedical Research of Barcelona (IIBB), Consejo Superior Investigaciones Científicas (CSIC) and Liver Unit-Hospital Clinic, Barcelona, Spain
- University of Southern California Research Center for Alcohol Liver and Pancreatic Diseases and Cirrhosis, Keck School of Medicine, USC, Los Angeles, CA, USA
| | - José L Mauriz
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain
| | - Javier González-Gallego
- Institute of Biomedicine (IBIOMED), University of León, León, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Spain.
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299
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Reiter RJ, Mayo JC, Tan DX, Sainz RM, Alatorre-Jimenez M, Qin L. Melatonin as an antioxidant: under promises but over delivers. J Pineal Res 2016; 61:253-78. [PMID: 27500468 DOI: 10.1111/jpi.12360] [Citation(s) in RCA: 1034] [Impact Index Per Article: 129.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 08/05/2016] [Indexed: 12/12/2022]
Abstract
Melatonin is uncommonly effective in reducing oxidative stress under a remarkably large number of circumstances. It achieves this action via a variety of means: direct detoxification of reactive oxygen and reactive nitrogen species and indirectly by stimulating antioxidant enzymes while suppressing the activity of pro-oxidant enzymes. In addition to these well-described actions, melatonin also reportedly chelates transition metals, which are involved in the Fenton/Haber-Weiss reactions; in doing so, melatonin reduces the formation of the devastatingly toxic hydroxyl radical resulting in the reduction of oxidative stress. Melatonin's ubiquitous but unequal intracellular distribution, including its high concentrations in mitochondria, likely aid in its capacity to resist oxidative stress and cellular apoptosis. There is credible evidence to suggest that melatonin should be classified as a mitochondria-targeted antioxidant. Melatonin's capacity to prevent oxidative damage and the associated physiological debilitation is well documented in numerous experimental ischemia/reperfusion (hypoxia/reoxygenation) studies especially in the brain (stroke) and in the heart (heart attack). Melatonin, via its antiradical mechanisms, also reduces the toxicity of noxious prescription drugs and of methamphetamine, a drug of abuse. Experimental findings also indicate that melatonin renders treatment-resistant cancers sensitive to various therapeutic agents and may be useful, due to its multiple antioxidant actions, in especially delaying and perhaps treating a variety of age-related diseases and dehumanizing conditions. Melatonin has been effectively used to combat oxidative stress, inflammation and cellular apoptosis and to restore tissue function in a number of human trials; its efficacy supports its more extensive use in a wider variety of human studies. The uncommonly high-safety profile of melatonin also bolsters this conclusion. It is the current feeling of the authors that, in view of the widely diverse beneficial functions that have been reported for melatonin, these may be merely epiphenomena of the more fundamental, yet-to-be identified basic action(s) of this ancient molecule.
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Affiliation(s)
- Russel J Reiter
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX, USA.
| | - Juan C Mayo
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX, USA
| | - Dun-Xian Tan
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX, USA
| | - Rosa M Sainz
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX, USA
| | - Moises Alatorre-Jimenez
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX, USA
| | - Lilian Qin
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX, USA
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300
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Lian C, Wu Z, Gao B, Peng Y, Liang A, Xu C, Liu L, Qiu X, Huang J, Zhou H, Cai Y, Su P, Huang D. Melatonin reversed tumor necrosis factor-alpha-inhibited osteogenesis of human mesenchymal stem cells by stabilizing SMAD1 protein. J Pineal Res 2016; 61:317-27. [PMID: 27265199 DOI: 10.1111/jpi.12349] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 06/03/2016] [Indexed: 12/29/2022]
Abstract
Tumor necrosis factor-alpha (TNFα) plays a pivotal role in inflammation-related osteoporosis through the promotion of bone resorption and suppression of bone formation. Numerous drugs have been produced to treat osteoporosis by inhibiting bone resorption, but they offer few benefits to bone formation, which is what is needed by patients with severe bone loss. Melatonin, which can exert both anti-inflammatory and pro-osteogenic effects, shows promise in overcoming TNFα-inhibited osteogenesis and deserves further research. This study demonstrated that melatonin rescued TNFα-inhibited osteogenesis of human mesenchymal stem cells and that the interactions between SMURF1 and SMAD1 mediated the crosstalk between melatonin signaling and TNFα signaling. Additionally, melatonin treatment was found to downregulate TNFα-induced SMURF1 expression and then decrease SMURF1-mediated ubiquitination and degradation of SMAD1 protein, leading to steady bone morphogenetic protein-SMAD1 signaling activity and restoration of TNFα-impaired osteogenesis. Thus, melatonin has prospects for treating osteoporosis caused by inflammatory factors due to its multifaceted functions on regulation of bone formation, bone resorption, and inflammation. Further studies will focus on unveiling the specific mechanisms by which melatonin downregulates SMURF1 expression and confirming the clinical therapeutic value of melatonin in the prevention and therapy of bone loss associated with inflammation.
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Affiliation(s)
- Chengjie Lian
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Zizhao Wu
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Bo Gao
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Yan Peng
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Anjing Liang
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Caixia Xu
- Research Centre for Translational Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Lei Liu
- Department of Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xianjian Qiu
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Junjun Huang
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Hang Zhou
- Department of Orthopedics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Yifeng Cai
- Department of Orthopedics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Peiqiang Su
- Department of Orthopedics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China.
| | - Dongsheng Huang
- Department of Orthopedics, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China.
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