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Csoma B, Bikov A. The Role of the Circadian Rhythm in Dyslipidaemia and Vascular Inflammation Leading to Atherosclerosis. Int J Mol Sci 2023; 24:14145. [PMID: 37762448 PMCID: PMC10532147 DOI: 10.3390/ijms241814145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
Cardiovascular diseases (CVD) are among the leading causes of death worldwide. Many lines of evidence suggest that the disturbances in circadian rhythm are responsible for the development of CVDs; however, circadian misalignment is not yet a treatable trait in clinical practice. The circadian rhythm is controlled by the central clock located in the suprachiasmatic nucleus and clock genes (molecular clock) located in all cells. Dyslipidaemia and vascular inflammation are two hallmarks of atherosclerosis and numerous experimental studies conclude that they are under direct influence by both central and molecular clocks. This review will summarise the results of experimental studies on lipid metabolism, vascular inflammation and circadian rhythm, and translate them into the pathophysiology of atherosclerosis and cardiovascular disease. We discuss the effect of time-respected administration of medications in cardiovascular medicine. We review the evidence on the effect of bright light and melatonin on cardiovascular health, lipid metabolism and vascular inflammation. Finally, we suggest an agenda for future research and recommend on clinical practice.
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Affiliation(s)
- Balazs Csoma
- Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester M23 9LT, UK;
- Department of Pulmonology, Semmelweis University, 1083 Budapest, Hungary
| | - Andras Bikov
- Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester M23 9LT, UK;
- Division of Immunology, Immunity to Infection and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PL, UK
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2
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Hosseini SF, Forouzesh M, Maleknia M, Valiyari S, Maniati M, Samimi A. The Molecular Mechanism of Aluminum Phosphide poisoning in Cardiovascular Disease: Pathophysiology and Diagnostic Approach. Cardiovasc Toxicol 2021; 20:454-461. [PMID: 32712815 DOI: 10.1007/s12012-020-09592-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Nowadays, poisoning with metal phosphides, especially aluminum phosphide (ALP), is one of the main health threats in human societies. Patients suffer from significant complications due to this type of poisoning, and the heart is one of the main organs targeted by ALP. Therefore, in this study, we discussed the effect of phosphine on cardiac function. This study is based on data obtained from PubMed, between 2002 and 2020. The key keywords included "Aluminum phosphide," "Oxidative Stress," "Mitochondria," "Cardiovascular disease," and "Treatment." The results showed that ALP produced reactive oxygen species (ROS) due to mitochondrial dysfunction. ROS production leads to red blood cell hemolysis, decreased ATP production, and induction of apoptosis in cardiomyocytes, which eventually results in cardiovascular disease. Since ALP has the most significant effect on cardiomyocytes, the use of appropriate treatment strategies to restore cell function can increase patients' survival.
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Affiliation(s)
| | - Mehdi Forouzesh
- Legal Medicine Research Center, Legal Medicine Organization, Tehran, Iran
| | - Mohsen Maleknia
- Thalassemia & Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Samira Valiyari
- Legal Medicine Research Center, Legal Medicine Organization, Tehran, Iran
| | - Mahmood Maniati
- Ahwaz Jundishapur University of Medical Sciences, Ahwaz, Iran
| | - Azin Samimi
- Legal Medicine Research Center, Legal Medicine Organization, Ahvaz, Iran. .,Department of Toxicology, Faculty of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
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Röck T, Bartz-Schmidt KU, Röck D. Management of double-head pterygium with conjunctival autograft and primary closure. Int Med Case Rep J 2020; 13:111-115. [PMID: 32308503 PMCID: PMC7138956 DOI: 10.2147/imcrj.s203897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 06/27/2019] [Indexed: 11/23/2022] Open
Abstract
Purpose Double-headed pterygia are rare and present the surgeon with challenges. This case report illustrates the surgical management and the course of healing in a double-head pterygium patient. Case report A 53-year-old man was referred to our eye hospital with a double-head pterygium of the right eye. During the follow-up examinations, 1 and 3 years later stable findings were found. Five years after initial referral we saw a progression of the double-head pterygium and the patient explained a worse visual acuity. The nasal and temporal pterygium was resected and conjunctival autograft transplantation, and a primary closure was performed, respectively, for the bulbar conjunctival reconstruction. After the surgery, a reduction in the inflammation and healing of the conjunctival lesion could be seen. At the 12-month follow-up, there was no sign of recurrence or any postoperative complication. Conclusion A surgical excision combined with conjunctival autograft transplantation and primary closure in a one-time intervention seems to be effective and economical for the treatment of double-head pterygium.
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Affiliation(s)
- Tobias Röck
- Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | | | - Daniel Röck
- Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
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4
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Khuzhakhmetova LK, Teply DL, Bazhanova ED. Pharmacological Correction of Alterations in Apoptosis of Neurons of the Hypothalamic Suprachiasmatic Nucleus and Pinealocytes in Rats during Aging and under Stress. ADVANCES IN GERONTOLOGY 2020. [DOI: 10.1134/s2079057020020083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Röck T, Bramkamp M, Bartz-Schmidt KU, Röck D. A Retrospective Study to Compare the Recurrence Rate After Treatment of Pterygium by Conjunctival Autograft, Primary Closure, and Amniotic Membrane Transplantation. Med Sci Monit 2019; 25:7976-7981. [PMID: 31647055 PMCID: PMC6824190 DOI: 10.12659/msm.915629] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND This study aimed to investigate the effectiveness of conjunctival autograft compared with primary closure and amniotic membrane transplantation for primary pterygium excision. MATERIAL AND METHODS Data were retrospectively studied from all primary pterygium excisions from January 2002 to December 2017 from the electronic database at the University Eye Hospital, Tübingen. RESULTS From 521 primary pterygium excisions, 284 (54.5%) were primary closures, 203 (39.0%) were conjunctival autografts, and 34 (6.5%) were amniotic membrane transplants. The mean number of primary pterygium excisions was 33 per year (range, 14-56 per year). The mean patient age was 58±15 years. Younger age was associated with a significantly increased recurrence rate (P=0.002). The mean pterygium recurrence rate in the three study groups at 12 months after surgery was 11.3% (range, 6.4-14.7%). Recurrence occurred 13 patients (6.4%) in the conjunctival autograft group, 41 patients (14.4%) in the primary closure group, and five patients (14.7%) in the amniotic membrane transplantation group. Conjunctival autograft was associated with a significantly lower recurrence rate (P=0.005). CONCLUSIONS A retrospective study at a single center to compare conjunctival autograft with primary closure and amniotic membrane transplantation for primary pterygium excision showed a significantly lower recurrence rate after surgery using a conjunctival autograft.
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Affiliation(s)
- Tobias Röck
- Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Matthias Bramkamp
- Department of General Medicine, Ruhr-University Bochum, Bochum, Germany
| | | | - Daniel Röck
- Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
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6
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Abstract
The main treatment for pterygium is surgical removal. However, pterygium surgery is concerned with high rates of postoperative recurrence. Predicting factors of recurrence are not fully understood, yet, but they probably depend on a multitude of patient-related, clinical, and/or surgical factors. Several adjuvant treatments have been proposed to reduce postoperative pterygium recurrence, including different antimetabolites, antiangiogenetic factors, and radiation therapy. The purpose of this review is to collect the current evidence regarding application and limits of different therapeutic approaches for preventing postoperative recurrence of pterygium, giving insights and perspectives for better management of this disease. In the light of the current evidence, pterygium surgery cannot disregard wound coverage with conjunctival autografting or rotational flap combined with adjuvant treatments. The rotational flap technique is associated with shorter surgical time rates and prevents graft displacement and necrosis, given its vascular pedicle. Amniotic membrane may still be reserved in case of great conjunctival defects or insufficient conjunctiva. Repeated subconjunctival antivascular endothelial growth factor injections can be considered as an effective and safe adjuvant treatment. Moreover, management of postoperative pain is crucial. Innovative treatment strategies will probably target different molecular pathways, considering recent findings regarding pterygium pathogenesis, to improve better understanding and develop universally shared guidelines. Great importance shall be dedicated to the identification of novel molecular biomarkers and favoring factors of recurrence, in order to achieve a customized surgical treatment for each patient and obtain maximal reduction of postoperative recurrence.
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Affiliation(s)
- Raffaele Nuzzi
- S.C.U. Ophthalmology Unit, "City of Health and Science" University Hospital, Department of Surgical Sciences, University of Turin, Turin, Italy,
| | - Federico Tridico
- S.C.U. Ophthalmology Unit, "City of Health and Science" University Hospital, Department of Surgical Sciences, University of Turin, Turin, Italy,
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7
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Asghari MH, Moloudizargari M, Baeeri M, Baghaei A, Rahimifard M, Solgi R, Jafari A, Aminjan HH, Hassani S, Moghadamnia AA, Ostad SN, Abdollahi M. On the mechanisms of melatonin in protection of aluminum phosphide cardiotoxicity. Arch Toxicol 2017; 91:3109-3120. [PMID: 28551710 DOI: 10.1007/s00204-017-1998-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/22/2017] [Indexed: 12/20/2022]
Abstract
Aluminum phosphide (AlP), one of the most commonly used pesticides worldwide, has been the leading cause of self-poisoning mortalities among many Asian countries. The heart is the main organ affected in AlP poisoning. Melatonin has been previously shown to be beneficial in reversing toxic changes in the heart. The present study reveals evidence on the probable protective effects of melatonin on AlP-induced cardiotoxicity in rats. The study groups included a control (almond oil only), ethanol 5% (solvent), sole melatonin (50 mg/kg), AlP (16.7 mg/kg), and 4 AlP + melatonin groups which received 20, 30, 40 and 50 mg/kg of melatonin by intraperitoneal injections following AlP treatment. An electronic cardiovascular monitoring device was used to record the electrocardiographic (ECG) parameters. Heart tissues were studied in terms of oxidative stress biomarkers, mitochondrial complexes activities, ADP/ATP ratio and apoptosis. Abnormal ECG records as well as declined heart rate and blood pressure were found to be related to AlP administration. Based on the results, melatonin was highly effective in controlling AlP-induced changes in the study groups. Significant improvements were observed in the activities of mitochondrial complexes, oxidative stress biomarkers, the activities of caspases 3 and 9, and ADP/ATP ratio following treatment with melatonin at doses of 40 and 50 mg/kg. Our results indicate that melatonin can counteract the AlP-induced oxidative damage in the heart. This is mainly done by maintaining the normal balance of intracellular ATP as well as the prevention of oxidative damage. Further research is warranted to evaluate the possibility of using melatonin as an antidote in AlP poisoning.
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Affiliation(s)
- Mohammad Hossein Asghari
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.,Department of Pharmacology, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Milad Moloudizargari
- Student Research Committee, Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Baeeri
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, 1417614411, Iran
| | - Amir Baghaei
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Alborz University of Medical Sciences, Karaj, Iran
| | - Mahban Rahimifard
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, 1417614411, Iran
| | - Reza Solgi
- Legal Medicine Research Center, Legal Medicine Organization of Iran, Hamedan, Iran
| | - Abbas Jafari
- Department of Occupational Health, School of Public Health, Urmia University of Medical Sciences, Urmia, Iran
| | - Hamed Haghi Aminjan
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Shokoufeh Hassani
- Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, 1417614411, Iran
| | - Ali Akbar Moghadamnia
- Department of Pharmacology, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Seyed Nasser Ostad
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Abdollahi
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran. .,Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, 1417614411, Iran.
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8
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Cardenas-Cantu E, Valenzuela J, Zavala J, Valdez-Garcýa JE. Basis of Pterygium Development. ACTA ACUST UNITED AC 2016. [DOI: 10.5005/highlights-44-6-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9
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Trivedi P, Jena G, Tikoo K, Kumar V. Melatonin modulated autophagy and Nrf2 signaling pathways in mice with colitis-associated colon carcinogenesis. Mol Carcinog 2015; 55:255-67. [DOI: 10.1002/mc.22274] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 11/15/2014] [Accepted: 11/26/2014] [Indexed: 01/07/2023]
Affiliation(s)
- P.P. Trivedi
- Facility for Risk Assessment and Intervention Studies; Department of Pharmacology and Toxicology; National Institute of Pharmaceutical Education and Research; Punjab India
| | - G.B. Jena
- Facility for Risk Assessment and Intervention Studies; Department of Pharmacology and Toxicology; National Institute of Pharmaceutical Education and Research; Punjab India
| | - K.B. Tikoo
- Laboratory of Chromatin Biology; Department of Pharmacology and Toxicology; National Institute of Pharmaceutical Education and Research; Punjab India
| | - V. Kumar
- Icon Analytical Equipment Pvt Ltd; Delhi India
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10
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Abstract
Pterygium pathogenesis is mainly related to UV light exposure. However, the exact mechanisms by which it is formed have not been elucidated. Clinical advances in surgical treatment use conjunctival autografts and amniotic membranes in combination with adjuvant therapies, including mitomycin C, β-radiation, and 5-fluoroacil, to reduce recurrence. Several studies aim to unveil the molecular mechanisms underlying pterygium growth and proliferation. They demonstrate the role of different factors, such as viruses, oxidative stress, DNA methylation, apoptotic and oncogenic proteins, loss of heterozygosity, microsatellite instability, inflammatory mediators, extracellular matrix modulators, lymphangiogenesis, cell epithelial-mesenchymal transition, and alterations in cholesterol metabolism in pterygium development. Understanding the molecular basis of pterygium provides new potential therapeutic targets for its prevention and elimination. This review focuses on providing a broad overview of what is currently known regarding molecular mechanisms of pterygium pathogenesis.
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Affiliation(s)
- Eduardo Cárdenas-Cantú
- a Ophthalmology Research Chair, School of Medicine and Health Sciences, Tecnologico de Monterrey , Monterrey , Mexico and
| | - Judith Zavala
- a Ophthalmology Research Chair, School of Medicine and Health Sciences, Tecnologico de Monterrey , Monterrey , Mexico and
| | - Jorge Valenzuela
- a Ophthalmology Research Chair, School of Medicine and Health Sciences, Tecnologico de Monterrey , Monterrey , Mexico and
| | - Jorge E Valdez-García
- a Ophthalmology Research Chair, School of Medicine and Health Sciences, Tecnologico de Monterrey , Monterrey , Mexico and.,b Ophthalmology Institute, Tec Salud, Tecnologico de Monterrey , Monterrey , Mexico
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11
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Reiter RJ, Tan DX, Galano A. Melatonin reduces lipid peroxidation and membrane viscosity. Front Physiol 2014; 5:377. [PMID: 25339906 PMCID: PMC4186275 DOI: 10.3389/fphys.2014.00377] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 09/11/2014] [Indexed: 12/17/2022] Open
Affiliation(s)
- Russel J Reiter
- Department of Cellular and Structural Biology, UT Health Science Center San Antonio, TX, USA
| | - Dun-Xian Tan
- Department of Cellular and Structural Biology, UT Health Science Center San Antonio, TX, USA
| | - Annia Galano
- Departamento de Quimica, Universidad Autonoma Metropolitana - Iztapalapa Mexico City, Mexico
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12
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Torkzahrani S, Heidari A, Mostafavi-Pour Z, Ahmadi M, Zal F. Amelioration of lipid abnormalities by vitamin therapy in women using oral contraceptives. Clin Exp Reprod Med 2014; 41:15-20. [PMID: 24693493 PMCID: PMC3968252 DOI: 10.5653/cerm.2014.41.1.15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 12/29/2013] [Accepted: 01/15/2014] [Indexed: 11/06/2022] Open
Abstract
Objective Combined oral contraceptives (COCs) have some adverse effects on the serum lipid profile. Because hyperlipidemia is one of the risk factors in cardiovascular diseases, lipid abnormalities should be evaluated in women consuming COCs. Vitamins E and C are known to have beneficial effects on serum lipid profiles. Therefore, in this study, we evaluated the effects of vitamins E and C on serum lipids in women using COCs. Methods The study compared changes in lipid parameters with and without vitamin therapy in women consuming COCs compared to those of a control group (40 non-contraceptive users or NCU) for 4 weeks. Total cholesterol and triglyceride, low-density lipoprotein (LDL), and high-density lipoprotein (HDL) levels along with HDL/LDL ratios were measured for all participants. Results COC users experienced significantly higher increases in the levels of triglycerides and LDL than non-users (p<0.05). However, no significant differences were noted in the total cholesterol and HDL levels. In the treated COC group receiving vitamins E and C, the HDL level and the HDL/LDL ratio increased and the LDL and triglycerides levels decreased significantly compared with those of the other groups. Conclusion The results of our study indicate that supplementation with antioxidant vitamins E and C restores a normal lipid profile in COC users.
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Affiliation(s)
- Shahnaz Torkzahrani
- Department of Midwifery, Faculty of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences & Health Services, Tehran, Iran
| | - Afrooz Heidari
- Department of Midwifery, Faculty of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences & Health Services, Tehran, Iran
| | - Zohreh Mostafavi-Pour
- Department of Biochemistry, Shiraz University of Medical Sciences, Shiraz, Iran. ; Maternal fetal medicine Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Majid Ahmadi
- Department of English Language, School of Paramedical Sciences, Shaheed Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Zal
- Department of Reproductive Biology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran. ; Infertility Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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13
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Trivedi PP, Jena GB. Melatonin reduces ulcerative colitis-associated local and systemic damage in mice: investigation on possible mechanisms. Dig Dis Sci 2013; 58:3460-74. [PMID: 23975342 DOI: 10.1007/s10620-013-2831-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Accepted: 07/27/2013] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS Ulcerative colitis (UC) is a chronic gastrointestinal disorder. Substantial research reveals that melatonin has beneficial effects in ulcerative colitis both experimentally and clinically. We have previously reported that ulcerative colitis was associated with local and systemic damage in mice. The purpose of this study was to reveal the novel targets of melatonin in its protective mechanism against ulcerative colitis in mice. We also wished to determine whether or not melatonin protected against ulcerative colitis-induced systemic damage in mice. METHODS Ulcerative colitis was induced in mice by use of 3% (w/v) dextran sulfate sodium for two cycles. One cycle comprised 7 days of DSS-treated water followed by 14 days of normal drinking water. Melatonin was administered at doses of 2, 4, or 8 mg/kg bw/day, po throughout. The effect of melatonin in mice with UC was evaluated by use of biochemical data, histological evaluation, comet and micronucleus assays, immunohistochemistry, and western blot analysis. RESULTS The results indicated that melatonin treatment ameliorated the severity of ulcerative colitis by modulating a variety of molecular targets, for example nuclear factor kappa B, cyclooxygenase-2, interleukin 17, signal transducer and activator of transcription 3, nuclear erythroid 2-related factor 2, matrix metalloproteinase-9, and connective tissue growth factor. Further, ulcerative colitis increased gut permeability, plasma lipopolysaccharide level, systemic inflammation, and genotoxicity. Melatonin treatment led to mucosal healing and reduced ulcerative colitis-induced elevated gut permeability and reduced the plasma LPS level, systemic inflammation, and genotoxicity. CONCLUSION Melatonin ameliorated ulcerative colitis-associated local and systemic damage in mice.
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Affiliation(s)
- P P Trivedi
- Department of Pharmacology and Toxicology, Facility for Risk Assessment and Intervention Studies, National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S. Nagar, Punjab, 160062, India,
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14
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Zhang H, Liu D, Wang X, Chen X, Long Y, Chai W, Zhou X, Rui X, Zhang Q, Wang H, Yang Q. Melatonin improved rat cardiac mitochondria and survival rate in septic heart injury. J Pineal Res 2013; 55:1-6. [PMID: 23330702 DOI: 10.1111/jpi.12033] [Citation(s) in RCA: 47] [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: 10/13/2012] [Accepted: 12/03/2012] [Indexed: 01/11/2023]
Abstract
The pathogenesis of septic myocardial depression is complicated. Mitochondrial dysfunction has been suggested to be one of the main reasons for the reduced cardiac function. As melatonin is an antioxidant with the potential to scavenge radicals in mitochondria, we therefore employed a sepsis model, that is, cecal ligation and double puncture (CLP) in rats, to study the melatonin effects on: (i), myocardial mitochondrial function; (ii), heart systolic function; and (iii), prognosis of septic rats. We demonstrate that melatonin treatment (30 mg/kg, 3, 6, 12, 18, 24 hr after CLP) (i) improved myocardial cytochrome c oxidase (CcOX) activity and blood lactate level, (ii) attenuated heart dysfunction with a higher left ventricular ejection fraction (EF), and (iii) promoted 48-h survival of the rats compared to CLP animals with no melatonin treatment. In conclusion, our results show that rat myocardial mitochondrial CcOX activity was depressed during severe sepsis accompanied by myocardial depression characterized by the decline of EF. In septic rats, melatonin increased the CcOX activity, improved heart systolic function, and lowered mortality rate. The clinical use of melatonin in septic myocardial depression should be tested in the future.
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Affiliation(s)
- Hongmin Zhang
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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15
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Tan DX, Manchester LC, Liu X, Rosales-Corral SA, Acuna-Castroviejo D, Reiter RJ. Mitochondria and chloroplasts as the original sites of melatonin synthesis: a hypothesis related to melatonin's primary function and evolution in eukaryotes. J Pineal Res 2013; 54:127-38. [PMID: 23137057 DOI: 10.1111/jpi.12026] [Citation(s) in RCA: 344] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 10/01/2012] [Indexed: 12/17/2022]
Abstract
Mitochondria and chloroplasts are major sources of free radical generation in living organisms. Because of this, these organelles require strong protection from free radicals and associated oxidative stress. Melatonin is a potent free radical scavenger and antioxidant. It meets the criteria as a mitochondrial and chloroplast antioxidant. Evidence has emerged to show that both mitochondria and chloroplasts may have the capacity to synthesize and metabolize melatonin. The activity of arylalkylamine N-acetyltransferase (AANAT), the reported rate-limiting enzyme in melatonin synthesis, has been identified in mitochondria, and high levels of melatonin have also been found in this organelle. From an evolutionary point of view, the precursor of mitochondria probably is the purple nonsulfur bacterium, particularly, Rhodospirillum rubrum, and chloroplasts are probably the descendents of cyanobacteria. These bacterial species were endosymbionts of host proto-eukaryotes and gradually transformed into cellular organelles, that is, mitochondria and chloroplasts, respectively, thereby giving rise to eukaryotic cells. Of special importance, both purple nonsulfur bacteria (R. rubrum) and cyanobacteria synthesize melatonin. The enzyme activities required for melatonin synthesis have also been detected in these primitive species. It is our hypothesis that mitochondria and chloroplasts are the original sites of melatonin synthesis in the early stage of endosymbiotic organisms; this synthetic capacity was carried into host eukaryotes by the above-mentioned bacteria. Moreover, their melatonin biosynthetic capacities have been preserved during evolution. In most, if not in all cells, mitochondria and chloroplasts may continue to be the primary sites of melatonin generation. Melatonin production in other cellular compartments may have derived from mitochondria and chloroplasts. On the basis of this hypothesis, it is also possible to explain why plants typically have higher melatonin levels than do animals. In plants, both chloroplasts and mitochondria likely synthesize melatonin, while animal cells contain only mitochondria. The high levels of melatonin produced by mitochondria and chloroplasts are used to protect these important cellular organelles against oxidative stress and preserve their physiological functions. The superior beneficial effects of melatonin in both mitochondria and chloroplasts have been frequently reported.
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Affiliation(s)
- Dun-Xian Tan
- Department of Cellular and Structural Biology, The University of Texas, Health Science Center, San Antonio, TX 78229, USA.
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16
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Argüelles S, Muñoz MF, Cano M, Machado A, Ayala A. In vitro and in vivo protection by melatonin against the decline of elongation factor-2 caused by lipid peroxidation: preservation of protein synthesis. J Pineal Res 2012; 53:1-10. [PMID: 22462727 DOI: 10.1111/j.1600-079x.2011.00961.x] [Citation(s) in RCA: 195] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
As organisms age, a considerable decrease in protein synthesis takes place in all tissues. Among the possible causes of the decline of translation in old animals are the modifications of elongation factor-2 (eEF-2). eEF-2 occupies an essential role in protein synthesis where it catalyzes the ribosomal translocation reaction. eEF-2 is particularly sensitive to increased oxidative stress. However, all oxidants do not affect eEF-2, only compounds that increase lipid peroxidation. As peroxides are unstable compounds, they decompose and generate a series of highly reactive compounds, including aldehydes malondialdehyde (MDA) and 4-hydroxynoenal (HNE). We have previously reported that hepatic eEF-2 forms adducts with low-molecular weight aldehydes, MDA and HNE. Therefore, the protection of eEF-2 must be specifically carried out by a compound with lipoperoxyl radical-scavenging features such as melatonin. In this article, we show the ability of melatonin to protect against the changes that occur in the eEF-2 under conditions of lipid peroxidation induced by cumene hydroperoxide (CH), a compound used experimentally to induce lipid breakdown. As experimental models, we used cultured cells and rats treated with this oxidant compound. eEF-2 levels, adduct formation of this protein with MDA and HNE, and lipid peroxides were determined. In the cultured cells, protein synthesis rate was also measured. Our results show that melatonin prevented the molecular changes in eEF-2 and the decline in protein synthesis rate secondary to lipid peroxidation. The results also show that serum levels of several hormones were affected by CH-induced oxidative stress, which was partially or totally prevented by melatonin.
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Affiliation(s)
- Sandro Argüelles
- Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad de Sevilla, Sevilla, España, Spain
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