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Majumder R, Datta M, Banerjee A, Bandyopadhyay D, Chattopadhyay A. Melatonin protects against ketorolac induced gastric mucosal toxic injuries through molecular mechanism associated with the modulation of Arylakylamine N-Acetyltransferase (AANAT) activity. Chem Biol Interact 2023; 382:110611. [PMID: 37348669 DOI: 10.1016/j.cbi.2023.110611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/24/2023] [Accepted: 06/19/2023] [Indexed: 06/24/2023]
Abstract
Ketorolac tromethamine (KT), is a widely used non-steroidal anti-inflammatory drug (NSAID) for treating moderate to severe pain. However, the use of KT has been restricted due to its highly toxic attributes that lead to severe gastric ulceration and bleeding. The protective effects of exogenous melatonin (MT) has been reported in conditions associated with gastro-intestinal disorders. This study aims at exploring the role of gastric endogenous MT level and it's metabolizing enzyme AANAT, at the onset of ketorolac mediated toxicities in the gastric mucosa. Gastric mucosal damage was induced in experimental rats by oral administration of graded doses of KT, where 50 mg/kg b.w. of KT was observed to incur maximum gastric lesions. However, gastric damages were found to be protected in rats, pre-treated with 60 mg/kg b.w. of MT. Post-sacrifice, mean ulcer index, oxidative status, total melatonin levels and enzyme activities associated with MT biosynthesis and catabolism were estimated. The results reveal that KT decreases AANAT activity with a concomitant decline in endogenous MT level which cumulatively aggravates gastric toxicity. Moreover, exogenous MT administration has been found to be protective in ameliorating this ulcerogenic process in rats, challenged with KT. Biochemical and histo-pathological observations revealed the reduction in oxidative stress level and replenishment of depleted gastric MT levels in MT pre-treated animals, which might be the causative factors in conferring protection to the gastric tissues and residing mitochondria. The results revealed a correlation between depleted gastric MT level and ulcer formation, which unveiled a novel ulcerogenic mechanism. This may bring forth future therapeutic relevance for treating patients suffering from KT mediated acute gastric toxicities.
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Affiliation(s)
- Romit Majumder
- Department of Physiology, Vidyasagar College, 39, Sankar Ghosh Lane, Kolkata, 700006, India; Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India
| | - Madhuri Datta
- Department of Physiology, Vidyasagar College, 39, Sankar Ghosh Lane, Kolkata, 700006, India; Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India
| | - Adrita Banerjee
- Department of Physiology, Vidyasagar College, 39, Sankar Ghosh Lane, Kolkata, 700006, India; Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India
| | - Debasish Bandyopadhyay
- Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, 92, APC Road, Kolkata, 700009, India.
| | - Aindrila Chattopadhyay
- Department of Physiology, Vidyasagar College, 39, Sankar Ghosh Lane, Kolkata, 700006, India.
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Mehrzadi S, Sheibani M, Koosha F, Alinaghian N, Pourhanifeh MH, Tabaeian SAP, Reiter RJ, Hosseinzadeh A. Protective and therapeutic potential of melatonin against intestinal diseases: updated review of current data based on molecular mechanisms. Expert Rev Gastroenterol Hepatol 2023; 17:1011-1029. [PMID: 37796746 DOI: 10.1080/17474124.2023.2267439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 10/03/2023] [Indexed: 10/07/2023]
Abstract
INTRODUCTION Intestinal diseases, a leading global cause of mortality and morbidity, carry a substantial socioeconomic burden. Small and large intestines play pivotal roles in gastrointestinal physiology and food digestion. Pathological conditions, such as gut dysbiosis, inflammation, cancer, therapy-related complications, ulcers, and ischemia, necessitate the urgent exploration of safe and effective complementary therapeutic strategies for optimal intestinal health. AREAS COVERED This article evaluates the potential therapeutic effects of melatonin, a molecule with a wide range of physiological actions, on intestinal diseases including inflammatory bowel disease, irritable bowel syndrome, colon cancer, gastric/duodenal ulcers and other intestinal disorders. EXPERT OPINION Due to anti-inflammatory and antioxidant properties as well as various biological actions, melatonin could be a therapeutic option for improving digestive disorders. However, more researches are needed to fully understand the potential benefits and risks of using melatonin for digestive disorders.
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Affiliation(s)
- Saeed Mehrzadi
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Sheibani
- Department of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fereshteh Koosha
- Department of Radiology Technology, Faculty of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nazila Alinaghian
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hossein Pourhanifeh
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | | | - Russel J Reiter
- Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, TX, USA
| | - Azam Hosseinzadeh
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
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Menczel Schrire Z, Phillips CL, Chapman JL, Duffy SL, Wong G, D'Rozario AL, Comas M, Raisin I, Saini B, Gordon CJ, McKinnon AC, Naismith SL, Marshall NS, Grunstein RR, Hoyos CM. Safety of higher doses of melatonin in adults: A systematic review and meta-analysis. J Pineal Res 2022; 72:e12782. [PMID: 34923676 DOI: 10.1111/jpi.12782] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/14/2021] [Accepted: 12/14/2021] [Indexed: 12/13/2022]
Abstract
Melatonin is commonly used for sleep and jetlag at low doses. However, there is less documentation on the safety of higher doses, which are being increasingly used for a wide variety of conditions, including more recently COVID-19 prevention and treatment. The aim of this review was to investigate the safety of higher doses of melatonin in adults. Medline, Scopus, Embase and PsycINFO databases from inception until December 2019 with convenience searches until October 2020. Randomised controlled trials investigating high-dose melatonin (≥10 mg) in human adults over 30 years of age were included. Two investigators independently abstracted articles using PRISMA guidelines. Risk of bias was assessed by a committee of three investigators. 79 studies were identified with a total of 3861 participants. Studies included a large range of medical conditions. The meta-analysis was pooled data using a random effects model. The outcomes examined were the number of adverse events (AEs), serious adverse events (SAEs) and withdrawals due to AEs. A total of 29 studies (37%) made no mention of the presence or absence of AEs. Overall, only four studies met the pre-specified low risk of bias criteria for meta-analysis. In that small subset, melatonin did not cause a detectable increase in SAEs (Rate Ratio = 0.88 [0.52, 1.50], p = .64) or withdrawals due to AEs (0.93 [0.24, 3.56], p = .92), but did appear to increase the risk of AEs such as drowsiness, headache and dizziness (1.40 [1.15, 1.69], p < .001). Overall, there has been limited AE reporting from high-dose melatonin studies. Based on this limited evidence, melatonin appears to have a good safety profile. Better safety reporting in future long-term trials is needed to confirm this as our confidence limits were very wide due to the paucity of suitable data.
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Affiliation(s)
- Zoe Menczel Schrire
- Healthy Brain Ageing Program, Faculty of Science, School of Psychology, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
- Brain & Mind Centre, The University of Sydney, Sydney, New South Wales, Australia
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
| | - Craig L Phillips
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Julia L Chapman
- Healthy Brain Ageing Program, Faculty of Science, School of Psychology, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
- Brain & Mind Centre, The University of Sydney, Sydney, New South Wales, Australia
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
| | - Shantel L Duffy
- Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
- Brain & Mind Centre, The University of Sydney, Sydney, New South Wales, Australia
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Grace Wong
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
| | - Angela L D'Rozario
- Healthy Brain Ageing Program, Faculty of Science, School of Psychology, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
- Brain & Mind Centre, The University of Sydney, Sydney, New South Wales, Australia
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
| | - Maria Comas
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
| | - Isabelle Raisin
- University Library, The University of Sydney, Sydney, New South Wales, Australia
| | - Bandana Saini
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Christopher J Gordon
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Andrew C McKinnon
- Healthy Brain Ageing Program, Faculty of Science, School of Psychology, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
- Brain & Mind Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Sharon L Naismith
- Healthy Brain Ageing Program, Faculty of Science, School of Psychology, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
- Brain & Mind Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Nathaniel S Marshall
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Ronald R Grunstein
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Camilla M Hoyos
- Healthy Brain Ageing Program, Faculty of Science, School of Psychology, The University of Sydney, Sydney, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
- Brain & Mind Centre, The University of Sydney, Sydney, New South Wales, Australia
- Woolcock Institute of Medical Research, Centre for Sleep and Chronobiology, University of Sydney, Sydney, New South Wales, Australia
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Protective Role of Melatonin and Its Metabolites in Skin Aging. Int J Mol Sci 2022; 23:ijms23031238. [PMID: 35163162 PMCID: PMC8835651 DOI: 10.3390/ijms23031238] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 02/01/2023] Open
Abstract
The skin, being the largest organ in the human body, is exposed to the environment and suffers from both intrinsic and extrinsic aging factors. The skin aging process is characterized by several clinical features such as wrinkling, loss of elasticity, and rough-textured appearance. This complex process is accompanied with phenotypic and functional changes in cutaneous and immune cells, as well as structural and functional disturbances in extracellular matrix components such as collagens and elastin. Because skin health is considered one of the principal factors representing overall “well-being” and the perception of “health” in humans, several anti-aging strategies have recently been developed. Thus, while the fundamental mechanisms regarding skin aging are known, new substances should be considered for introduction into dermatological treatments. Herein, we describe melatonin and its metabolites as potential “aging neutralizers”. Melatonin, an evolutionarily ancient derivative of serotonin with hormonal properties, is the main neuroendocrine secretory product of the pineal gland. It regulates circadian rhythmicity and also exerts anti-oxidative, anti-inflammatory, immunomodulatory, and anti-tumor capacities. The intention of this review is to summarize changes within skin aging, research advances on the molecular mechanisms leading to these changes, and the impact of the melatoninergic anti-oxidative system controlled by melatonin and its metabolites, targeting the prevention or reversal of skin aging.
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Zakaria R, Ahmi A, Ahmad AH, Othman Z. Worldwide melatonin research: a bibliometric analysis of the published literature between 2015 and 2019. Chronobiol Int 2020; 38:27-37. [PMID: 33164592 DOI: 10.1080/07420528.2020.1838534] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This study presents a bibliometric analysis of the publications on melatonin research from the Scopus database during the period 2015-2019. Based on the keywords used, which are related to melatonin in the article title, the study retrieved 4411 documents for further analysis using various tools. We used Microsoft Excel to conduct the frequency analysis, VOSviewer for data visualization, and Harzing's Publish or Perish for citation metrics and analysis. This study reports the results using standard bibliometric indicators such as the growth of publications, authorship patterns, collaboration, and prolific authors, country contribution, most active institutions, preferred journals, and top-cited articles. Based on our findings, there is a continuous growth of publications on melatonin research for 5 years since 2015. China was the largest contributor to melatonin research, followed by the United States. The Journal of Pineal Research published the most number of publications related to melatonin research. Our findings suggest that the role of melatonin in plant and food sciences, as well as in cancer, may in later years take over the clusters that earlier dominated melatonin research.
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Affiliation(s)
- Rahimah Zakaria
- Department of Psychiatry, School of Medical Sciences, Universiti Sains Malaysia , Kubang Kerian, Malaysia
| | - Aidi Ahmi
- Tunku Puteri Intan Safinaz School of Accountancy, Universiti Utara Malaysia 06010 UUM Sintok , Kedah, Malaysia
| | - Asma Hayati Ahmad
- Department of Psychiatry, School of Medical Sciences, Universiti Sains Malaysia , Kubang Kerian, Malaysia
| | - Zahiruddin Othman
- Department of Psychiatry, School of Medical Sciences, Universiti Sains Malaysia , Kubang Kerian, Malaysia
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6
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Mirza-Aghazadeh-Attari M, Reiter RJ, Rikhtegar R, Jalili J, Hajalioghli P, Mihanfar A, Majidinia M, Yousefi B. Melatonin: An atypical hormone with major functions in the regulation of angiogenesis. IUBMB Life 2020; 72:1560-1584. [PMID: 32329956 DOI: 10.1002/iub.2287] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 03/10/2020] [Accepted: 03/26/2020] [Indexed: 02/06/2023]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine), a pleotropic molecule with a wide distribution, has received considerable attention in recent years, mostly because of its various major effects on tissues or cells since it has both receptor-dependent and receptor-independent actions over a wide range of concentrations. These biological and physiological functions of melatonin include regulation of circadian rhythms by modulating the expression of core oscillator genes, scavenging the reactive oxygen species and reactive nitrogen species, modulating the immune system and inflammatory response, and exerting cytoprotective and antiapoptotic effects. Given the multiple critical roles of melatonin, dysregulation of its production or any disruption in signaling through its receptors may have contributed in the development of a wide range of disorders including type 2 diabetes, aging, immune-mediated diseases, hypertension, and cancer. Herein, we focus on the modulatory effects of melatonin on angiogenesis and its implications as a therapeutic strategy in cancer and related diseases.
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Affiliation(s)
- Mohammad Mirza-Aghazadeh-Attari
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Russel J Reiter
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Reza Rikhtegar
- Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Javad Jalili
- Radiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parisa Hajalioghli
- Radiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ainaz Mihanfar
- Solid Tumor Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Maryam Majidinia
- Solid Tumor Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Bahman Yousefi
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Ma Q, Reiter RJ, Chen Y. Role of melatonin in controlling angiogenesis under physiological and pathological conditions. Angiogenesis 2019; 23:91-104. [PMID: 31650428 DOI: 10.1007/s10456-019-09689-7] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/09/2019] [Indexed: 02/07/2023]
Abstract
Angiogenesis depends on proangiogenic and anti-angiogenic molecules that regulate endothelial cell proliferation and migration. Well-regulated angiogenesis plays a pivotal role in many physiological conditions such as reproduction and embryonic development, while abnormal angiogenesis is also the basis of a variety of pathological processes including tumor metastasis and atherosclerotic plaque formation. Melatonin has a variety of biological effects, including inhibition of tumor metastasis, stabilizing atherosclerotic plaques, and the regulation of seasonal reproductive rhythms, etc. During certain pathophysiological processes, melatonin exerts different functions depending on its ability to regulate angiogenesis. This review reveals that melatonin has different effects on neovascularization under different physiological and pathological conditions. In tumors, in age-related ocular diseases, and in a hypoxic environment, melatonin inhibits neovascularization in tissues, while in gastric ulcers, skin lesions, and some physiologic processes, it promotes angiogenesis. We also speculate that melatonin may inhibit the neovascularization in atherosclerotic plaques, thus preventing the initiation and development of atherosclerosis. Most studies suggest that these effects are related to the role of melatonin in regulating of vascular endothelial growth factor and its receptors, but the specific regulatory mechanisms remain disparate, which may lead to the differential effects of melatonin on angiogenesis under different conditions. In this review, we thus summarize some seemingly contradictory mechanisms by which melatonin controls angiogenesis under different pathological and physiological conditions, and urge that the regulatory mechanisms be further studied.
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Affiliation(s)
- Qiang Ma
- Department of Cardiology, Chinese PLA General Hospital, Beijing, 100853, China.,Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, Texas, 78229, USA
| | - Russel J Reiter
- Department of Cell Systems and Anatomy, UT Health San Antonio, San Antonio, Texas, 78229, USA.
| | - Yundai Chen
- Department of Cardiology, Chinese PLA General Hospital, Beijing, 100853, China.
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8
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Melatonin supports alendronate in preserving bone matrix and prevents gastric inflammation in ovariectomized rats. Cell Biochem Funct 2019; 37:102-112. [DOI: 10.1002/cbf.3379] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 01/21/2019] [Accepted: 01/21/2019] [Indexed: 12/29/2022]
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Combined treatment with melatonin and insulin improves glycemic control, white adipose tissue metabolism and reproductive axis of diabetic male rats. Life Sci 2018; 199:158-166. [PMID: 29501522 DOI: 10.1016/j.lfs.2018.02.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 02/14/2018] [Accepted: 02/26/2018] [Indexed: 01/27/2023]
Abstract
AIMS Melatonin treatment has been reported to be capable of ameliorating metabolic diabetes-related abnormalities but also to cause hypogonadism in rats. We investigated whether the combined treatment with melatonin and insulin can improve insulin resistance and other metabolic disorders in rats with streptozotocin-induced diabetes during neonatal period and the repercussion of this treatment on the hypothalamic-pituitary-gonadal axis. MAIN METHODS At the fourth week of age, diabetic animals started an 8-wk treatment with only melatonin (0.2 mg/kg body weight) added to drinking water at night or associated with insulin (NHP, 1.5 U/100 g/day) or only insulin. Animals were then euthanized, and the subcutaneous (SC), epididymal (EP), and retroperitoneal (RP) fat pads were excised, weighed and processed for adipocyte isolation for morphometric analysis as well as for measuring glucose uptake, oxidation, and incorporation of glucose into lipids. Hypothalamus was collected for gene expression and blood samples were collected for biochemical assays. KEY FINDINGS The treatment with melatonin plus insulin (MI) was capable of maintaining glycemic control. In epididymal (EP) and subcutaneous (SC) adipocytes, the melatonin plus insulin (MI) treatment group recovered the insulin responsiveness. In the hypothalamus, melatonin treatment alone promoted a significant reduction in kisspeptin-1, neurokinin B and androgen receptor mRNA levels, in relation to control group. SIGNIFICANCE Combined treatment with melatonin and insulin promoted a better glycemic control, improving insulin sensitivity in white adipose tissue (WAT). Indeed, melatonin treatment reduced hypothalamic genes related to reproductive function.
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Gul S, Saleem D, Haleem MA, Haleem DJ. Inhibition of hormonal and behavioral effects of stress by tryptophan in rats. Nutr Neurosci 2017; 22:409-417. [DOI: 10.1080/1028415x.2017.1395551] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sumera Gul
- Neuroscience Research Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research, University of Karachi, Karachi 75270, Pakistan
- Department of Physiology, Wah Medical College, Wah Cantt, Pakistan
| | - Darakhshan Saleem
- Department of Biomedical Engineering, Sir Syed University of Engineering and Technology, Karachi 75300, Pakistan
| | - Muhammad A. Haleem
- Department of Biomedical Engineering, Sir Syed University of Engineering and Technology, Karachi 75300, Pakistan
| | - Darakhshan Jabeen Haleem
- Neuroscience Research Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research, University of Karachi, Karachi 75270, Pakistan
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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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12
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Haleem DJ. Improving therapeutics in anorexia nervosa with tryptophan. Life Sci 2017; 178:87-93. [PMID: 28438641 DOI: 10.1016/j.lfs.2017.04.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/20/2017] [Accepted: 04/20/2017] [Indexed: 11/28/2022]
Abstract
A growing body of evidence suggests that our diet is an important contributing factor in the development, management and prevention of a number of psychiatric illnesses. Tryptophan, an essential amino acid, is the sole precursor of neurotransmitter 5-hydroxytryptamine (5-HT; serotonin). Administration of tryptophan can boost serotonin neurotransmission to produce therapeutically important effects in serotonin deficiency disorders. Anorexia nervosa (AN) an eating disorder associated with high levels of psychiatric comorbidity including psychosis, hyperactivity, depression and anxiety has highest lethality of all psychiatric illnesses. Evidence suggests that excessive dieting and food restriction can decrease brain tryptophan and serotonin in AN patients to precipitate depression, psychosis and hyperactivity. There are currently no FDA approved pharmacological treatments available for AN patients; antidepressants and antipsychotics, largely used to treat associated psychiatric comorbidities are also not very effective. The aim of this non-systematic review article is to evaluate and document a potential importance of tryptophan supplementation in improving therapeutics in AN patients.
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Affiliation(s)
- Darakhshan Jabeen Haleem
- Neuroscience Research Laboratory, Dr. Panjwani Center for Molecular Medicine & Drug Research (PCMD), International Center for Chemical and Biological Science (ICCBS), University of Karachi, Karachi 75270, Pakistan.
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13
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Berstad A, Raa J, Valeur J. Indole - the scent of a healthy 'inner soil'. MICROBIAL ECOLOGY IN HEALTH AND DISEASE 2015; 26:27997. [PMID: 26282698 PMCID: PMC4539392 DOI: 10.3402/mehd.v26.27997] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/24/2015] [Accepted: 06/25/2015] [Indexed: 12/11/2022]
Abstract
Tryptophan is an essential amino acid with an indole nucleus. Humans cannot produce this amino acid themselves, but must obtain it through their diet. Much attention is currently paid to the wide physiological and clinical implications of the tryptophan-derived substances, serotonin and kynurenines, generated by human enzymes following the intestinal absorption of tryptophan. However, even before being absorbed, several microbial metabolites of tryptophan are formed, mainly from ‘malabsorbed’ (incompletely digested) proteins within the colon. The normal smell of human faeces is largely due to indole, one of the major metabolites. Recent studies indicate that this foul-smelling substance is also of utmost importance for our health.
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Affiliation(s)
- Arnold Berstad
- Unger-Vetlesen Institute, Lovisenberg Diakonale Hospital, Oslo, Norway;
| | - Jan Raa
- Unger-Vetlesen Institute, Lovisenberg Diakonale Hospital, Oslo, Norway
| | - Jørgen Valeur
- Unger-Vetlesen Institute, Lovisenberg Diakonale Hospital, Oslo, Norway
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Molecular aspects of melatonin (MLT)-mediated therapeutic effects. Life Sci 2015; 135:147-57. [DOI: 10.1016/j.lfs.2015.06.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 06/15/2015] [Accepted: 06/23/2015] [Indexed: 01/08/2023]
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15
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Zhu MX, Huang Q, Wang F, Xie J, Xiang Q, Zhang L. Changes in serum melatonin and estrogen levels in women with functional dyspepsia. Shijie Huaren Xiaohua Zazhi 2015; 23:3038-3044. [DOI: 10.11569/wcjd.v23.i19.3038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To detect the levels of serum melatonin and estrogen in women with functional dyspepsia (FD), and to evaluate the possible mechanism of FD.
METHODS: Sixty women diagnosed with FD according to Roman Ⅲ criteria were included into an experimental group, which was further divided into two subgroups: patients with epigastric pain syndrome (EPS) (n = 35) and those with postprandial distress syndrome (PDS) (n = 25). Thirty healthy person were chose as normal controls. Serum melatonin and estrogen levels were measured and analyzed in these subjects.
RESULTS: In the FD group and PDS subgroup, the levels of serum melatonin were significantly higher than that in normal controls (P < 0.05). In the PDS subgroup, the concentration of serum melatonin was significantly higher than that in the EPS subgroup (P < 0.05). There was no significant difference in the concentration of serum melatonin between the EPS subgroup and the normal control group (P > 0.05). PDS patients with severe symptoms displayed a higher melatonin concentration as compared with patients with moderate symptoms (P < 0.05). EPS patients with severe symptoms displayed a lower melatonin concentration as compared with patients with moderate symptoms (P < 0.05). In the FD subgroup (menopausal transition), the concentration of serum estrogen was significantly lower than that in normal controls (P < 0.05). FD patients (menopausal transition) with severe symptoms displayed a lower estrogen concentration as compared with patients with moderate symptoms (P < 0.05). In FD patients (menopausal transition), there was no significant correlation between the levels of serum melatonin and estrogen (r = -0.03, P > 0.05).
CONCLUSION: The alteration of serum melatonin may play a role in the pathogenesis of FD, especially PDS, but has no obvious relation with EPS. Serum melatonin level maybe have certain significance for the diagnosis of various clinical forms of FD. The alteration of serum estrogen may play a role in the development of FD. Supplementing exogenous estrogen may improve symptoms of FD patients with perimenopausal symptoms.
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Ito H, Ando T, Ogiso H, Arioka Y, Saito K, Seishima M. Inhibition of indoleamine 2,3-dioxygenase activity accelerates skin wound healing. Biomaterials 2015; 53:221-8. [DOI: 10.1016/j.biomaterials.2015.02.098] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 02/16/2015] [Accepted: 02/21/2015] [Indexed: 12/26/2022]
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17
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Zhang L, Gong JT, Zhang HQ, Song QH, Xu GH, Cai L, Tang XD, Zhang HF, Liu FE, Jia ZS, Zhang HW. Melatonin Attenuates Noise Stress-induced Gastrointestinal Motility Disorder and Gastric Stress Ulcer: Role of Gastrointestinal Hormones and Oxidative Stress in Rats. J Neurogastroenterol Motil 2015; 21:189-99. [PMID: 25537679 PMCID: PMC4398253 DOI: 10.5056/jnm14119] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 11/05/2014] [Accepted: 11/05/2014] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND/AIMS There are increasing evidences for gastrointestinal motility disorder (GIMD) and gastric stress ulcer induced by noise stress. The present study was to investigate the reversed effect of melatonin on GIMD and gastric stress ulcer induced by noise stress and potential mechanism. METHODS Noise stress was induced on rats, and melatonin (15 mg/kg) was administered to rats by intraperitoneal injection. Differences were assessed in gastric residual rate (GRR), small intestine propulsion rate (SPR), Guth injury score, cortisol, gastrointestinal hormones (calcitonin-gene-related peptide and motilin) and oxidative stress markers (superoxide dismutase and malondialde hyde) in blood plasma as well as gastric mucosa homogenate with or without melatonin. The pathological examination of gastric mucosa was also performed. RESULTS The GRR and SPR were improved by noise stress compared with control (P < 0.05). The pathological examination and Guth injury score revealed gastric stress ulcer. Moreover, the levels of cortisol, motilin and malondialdehyde in blood plasma and ma-londialdehyde in gastric mucosa homogenate were increased by noise stress (P < 0.05). CGRP and superoxide dismutase activ-ity in both of blood plasma and gastric mucosa homogenate were significantly decreased (P< 0.05). Furthermore, melatonin reversed changes in GRR, SPR, pathological examination, Guth injury score, cortisol, motilin, CGRP, superoxide dismutase activity and malondialdehyde (P < 0.05). CONCLUSIONS Melatonin is effective in reversing the GIMD and gastric stress ulcer induced by noise stress. The underlying mechanism may be involved in oxidative stress and gastrointestinal hormones.
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Affiliation(s)
- Lei Zhang
- Experiment Teaching Center of Basic Medicine, The Fourth Military Medical University, Xi'an, Shan Xi province, China.,Department of General Surgery, No.406 hospital, Da Lian, Liao Ning Province, China.,State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shan Xi Province, China
| | - Ji T Gong
- Department of Otorhinolaryngology, Baoji Hospital of Chinese Medicine, Shan Xi Province, China
| | - Hu Q Zhang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shan Xi Province, China
| | - Quan H Song
- Department of General Surgery, No.406 hospital, Da Lian, Liao Ning Province, China
| | - Guang H Xu
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shan Xi Province, China
| | - Lei Cai
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shan Xi Province, China
| | - Xiao D Tang
- Department of General Surgery, No.406 hospital, Da Lian, Liao Ning Province, China
| | - Hai F Zhang
- Experiment Teaching Center of Basic Medicine, The Fourth Military Medical University, Xi'an, Shan Xi province, China
| | - Fang-E Liu
- Experiment Teaching Center of Basic Medicine, The Fourth Military Medical University, Xi'an, Shan Xi province, China
| | - Zhan S Jia
- Department of Infectious Diseases, Tangdu Hospital, the Fourth Military Medical University, Xi'an, China
| | - Hong W Zhang
- State Key Laboratory of Cancer Biology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, Xi'an, Shan Xi Province, China
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Weil ZM, Borniger JC, Cisse YM, Abi Salloum BA, Nelson RJ. Neuroendocrine control of photoperiodic changes in immune function. Front Neuroendocrinol 2015; 37:108-18. [PMID: 25456047 PMCID: PMC4402123 DOI: 10.1016/j.yfrne.2014.10.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 10/07/2014] [Accepted: 10/09/2014] [Indexed: 12/29/2022]
Abstract
Seasonal variation in immune function putatively maximizes survival and reproductive success. Day length (photoperiod) is the most potent signal for time of year. Animals typically organize breeding, growth, and behavior to adapt to spatial and temporal niches. Outside the tropics individuals monitor photoperiod to support adaptations favoring survival and reproductive success. Changes in day length allow anticipation of seasonal changes in temperature and food availability that are critical for reproductive success. Immune function is typically bolstered during winter, whereas reproduction and growth are favored during summer. We provide an overview of how photoperiod influences neuronal function and melatonin secretion, how melatonin acts directly and indirectly to govern seasonal changes in immune function, and the manner by which other neuroendocrine effectors such as glucocorticoids, prolactin, thyroid, and sex steroid hormones modulate seasonal variations in immune function. Potential future research avenues include commensal gut microbiota and light pollution influences on photoperiodic responses.
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Affiliation(s)
- Zachary M Weil
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Jeremy C Borniger
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Yasmine M Cisse
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Bachir A Abi Salloum
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Randy J Nelson
- Department of Neuroscience, Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
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Rivara S, Pala D, Bedini A, Spadoni G. Therapeutic uses of melatonin and melatonin derivatives: a patent review (2012 – 2014). Expert Opin Ther Pat 2015; 25:425-41. [DOI: 10.1517/13543776.2014.1001739] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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20
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Gonciarz M, Bielański W, Partyka R, Brzozowski T, Konturek PC, Eszyk J, Celiński K, Reiter RJ, Konturek SJ. Plasma insulin, leptin, adiponectin, resistin, ghrelin, and melatonin in nonalcoholic steatohepatitis patients treated with melatonin. J Pineal Res 2013; 54:154-61. [PMID: 22804755 DOI: 10.1111/j.1600-079x.2012.01023.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Insulin resistance, oxidative stress, and an abnormal production of adipokines and cytokines are implicated in the pathogenesis of nonalcoholic steatohepatitis (NASH). Recently, we reported a significant improvement in plasma liver enzymes among patients with NASH treated with melatonin. In this study, we investigated the effect of melatonin, administered at a dose of 10 mg/day for 28 days to 16 patients with histologically proven NASH on insulin resistance (HOMA-IR), on the plasma levels of adiponectin, leptin, ghrelin, and resistin. Additionally, plasma levels of aminotransferases and gamma glutamyltranspeptidase as well as plasma concentrations of melatonin were evaluated. Median baseline values of HOMA-IR, leptin (ng/mL), and resistin (pg/mL) in patients with NASH were significantly higher in comparison with controls: 4.90 versus 1.60, 10.70 versus 4.30, and 152 versus 91, respectively. Median adiponectin level (μg/mL) was decreased in patients compared to controls: 6.40 versus 16.25; no significant difference in ghrelin levels between patients and controls was found. After melatonin treatment, the median value of HOMA-IR was significantly reduced by 60% as compared to baseline values, whereas adiponectin, leptin, and ghrelin plasma levels rose significantly by 119%, 33%, and 20%, respectively; the difference between pre-/posttreatment in plasma resistin levels was not significant. These findings make melatonin a suitable candidate for testing in patients with NASH in the large controlled clinical trials.
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Affiliation(s)
- Maciej Gonciarz
- Department of Gastroenterology, St Barbara's Main District Hospital, Sosnowiec, Poland
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de Matos Cavalcante AG, de Bruin PFC, de Bruin VMS, Nunes DM, Pereira EDB, Cavalcante MM, Andrade GM. Melatonin reduces lung oxidative stress in patients with chronic obstructive pulmonary disease: a randomized, double-blind, placebo-controlled study. J Pineal Res 2012; 53:238-44. [PMID: 22507631 DOI: 10.1111/j.1600-079x.2012.00992.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Chronic obstructive pulmonary disease (COPD), a major cause of death and disability, is attributed to an abnormal inflammatory response by the lungs to noxious substances, primarily from cigarette smoke. Although oxidative stress is regarded as central to the pathogenesis of COPD, very few studies have examined the effects of antioxidants in this condition. This was a randomized, double-blind, placebo-controlled study on the effects of melatonin in COPD. Thirty-six consecutive patients with clinically stable moderate to very severe COPD (30 men; mean±S.D.=66.6±7.8yr) were randomized to receive 3mg melatonin (N=18) or placebo for 3 months. Oxidative stress was evaluated by 8-isoprostane levels in exhaled breath condensate at baseline (T0) and after one (T1), two (T2), and three months (T3) of treatment. Additionally, exhaled breath condensate levels of IL-8, dyspnea severity (Medical Research Council scale), lung function (spirometry), and functional exercise capacity (six min walk test) were compared at baseline and after treatment. Patients receiving melatonin showed a decrease in 8-isoprostane (T0: mean±S.E.M.=20.41±2.92pg/mL; T1: 18.56±2.68pg/mL; T2: 12.68±2.04pg/mL; T3: 12.70±2.18pg/mL; P=0.04; repeated measures ANOVA) with significant differences from baseline after 2 (P=0.03) and 3months (P=0.01). Dyspnea was improved by melatonin (P=0.01), despite no significant changes in lung function or exercise capacity. Placebo-treated patients, but not those who were given melatonin, showed an increase in IL-8 (P=0.03). In summary, melatonin administration reduced oxidative stress and improved dyspnea in COPD. Further studies are necessary to determine the potential role for melatonin in the long-term management of these patients.
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de Oliveira AC, Andreotti S, Farias TDSM, Torres-Leal FL, de Proença ARG, Campaña AB, de Souza AH, Sertié RAL, Carpinelli AR, Cipolla-Neto J, Lima FB. Metabolic disorders and adipose tissue insulin responsiveness in neonatally STZ-induced diabetic rats are improved by long-term melatonin treatment. Endocrinology 2012; 153:2178-88. [PMID: 22374967 DOI: 10.1210/en.2011-1675] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Diabetes mellitus is a product of low insulin sensibility and pancreatic β-cell insufficiency. Rats with streptozotocin-induced diabetes during the neonatal period by the fifth day of age develop the classic diabetic picture of hyperglycemia, hypoinsulinemia, polyuria, and polydipsia aggravated by insulin resistance in adulthood. In this study, we investigated whether the effect of long-term treatment with melatonin can improve insulin resistance and other metabolic disorders in these animals. At the fourth week of age, diabetic animals started an 8-wk treatment with melatonin (1 mg/kg body weight) in the drinking water at night. Animals were then killing, and the sc, epididymal (EP), and retroperitoneal (RP) fat pads were excised, weighed, and processed for adipocyte isolation for morphometric analysis as well as for measuring glucose uptake, oxidation, and incorporation of glucose into lipids. Blood samples were collected for biochemical assays. Melatonin treatment reduced hyperglycemia, polydipsia, and polyphagia as well as improved insulin resistance as demonstrated by constant glucose disappearance rate and homeostasis model of assessment-insulin resistance. However, melatonin treatment was unable to recover body weight deficiency, fat mass, and adipocyte size of diabetic animals. Adiponectin and fructosamine levels were completely recovered by melatonin, whereas neither plasma insulin level nor insulin secretion capacity was improved in diabetic animals. Furthermore, melatonin caused a marked delay in the sexual development, leaving genital structures smaller than those of nontreated diabetic animals. Melatonin treatment improved the responsiveness of adipocytes to insulin in diabetic animals measured by tests of glucose uptake (sc, EP, and RP), glucose oxidation, and incorporation of glucose into lipids (EP and RP), an effect that seems partially related to an increased expression of insulin receptor substrate 1, acetyl-coenzyme A carboxylase and fatty acid synthase. In conclusion, melatonin treatment was capable of ameliorating the metabolic abnormalities in this particular diabetes model, including insulin resistance and promoting a better long-term glycemic control.
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Affiliation(s)
- Ariclécio C de Oliveira
- Superior Institute of Biomedical Sciences, State University of Ceará, Fortaleza, Ceará 60135-420, Brazil
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Sanchez-Barcelo EJ, Mediavilla MD, Alonso-Gonzalez C, Reiter RJ. Melatonin uses in oncology: breast cancer prevention and reduction of the side effects of chemotherapy and radiation. Expert Opin Investig Drugs 2012; 21:819-31. [PMID: 22500582 DOI: 10.1517/13543784.2012.681045] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
INTRODUCTION The possible oncostatic properties of melatonin on different types of neoplasias have been studied especially in hormone-dependent adenocarcinomas. Despite the promising results of these experimental investigations, the use of melatonin in breast cancer treatment in humans is still uncommon. AREAS COVERED This article reviews the usefulness of this indoleamine for specific aspects of breast cancer management, particularly in reference to melatonin's antiestrogenic and antioxidant properties: i) treatments oriented to breast cancer prevention, especially when the risk factors are obesity, steroid hormone treatment or chronodisruption by exposure to light at night (LAN); ii) treatment of the side effects associated with chemo- or radiotherapy. EXPERT OPINION The clinical utility of melatonin depends on the appropriate identification of its actions. Because of its SERM (selective estrogen receptor modulators) and SEEM (selective estrogen enzyme modulators) properties, and its virtual absence of contraindications, melatonin could be an excellent adjuvant with the drugs currently used for breast cancer prevention (antiestrogens and antiaromatases). The antioxidant actions also make melatonin a suitable treatment to reduce oxidative stress associated with chemotherapy, especially with anthracyclines, and radiotherapy.
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Slominski RM, Reiter RJ, Schlabritz-Loutsevitch N, Ostrom RS, Slominski AT. Melatonin membrane receptors in peripheral tissues: distribution and functions. Mol Cell Endocrinol 2012; 351:152-66. [PMID: 22245784 PMCID: PMC3288509 DOI: 10.1016/j.mce.2012.01.004] [Citation(s) in RCA: 465] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 01/01/2012] [Indexed: 12/15/2022]
Abstract
Many of melatonin's actions are mediated through interaction with the G-protein coupled membrane bound melatonin receptors type 1 and type 2 (MT1 and MT2, respectively) or, indirectly with nuclear orphan receptors from the RORα/RZR family. Melatonin also binds to the quinone reductase II enzyme, previously defined the MT3 receptor. Melatonin receptors are widely distributed in the body; herein we summarize their expression and actions in non-neural tissues. Several controversies still exist regarding, for example, whether melatonin binds the RORα/RZR family. Studies of the peripheral distribution of melatonin receptors are important since they are attractive targets for immunomodulation, regulation of endocrine, reproductive and cardiovascular functions, modulation of skin pigmentation, hair growth, cancerogenesis, and aging. Melatonin receptor agonists and antagonists have an exciting future since they could define multiple mechanisms by which melatonin modulates the complexity of such a wide variety of physiological and pathological processes.
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Affiliation(s)
- Radomir M. Slominski
- Department of Pharmacology, University of Tennessee Health Science Center, Memphis, TN 38163, United States
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, United States
| | - Russel J. Reiter
- Department of Cellular & Structural Biology, UT Health Science Center, San Antonio, TX 78229-3900, United States
| | - Natalia Schlabritz-Loutsevitch
- Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, Memphis, TN 38163, United States
| | - Rennolds S. Ostrom
- Department of Pharmacology, University of Tennessee Health Science Center, Memphis, TN 38163, United States
| | - Andrzej T. Slominski
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, United States
- Division of Dermatology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, United States
- Corresponding author at: Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, 930 Madison Avenue, Suite 5000, Memphis, TN 38163, United States. Tel.: +1 901 448 3741. (A.T. Slominski)
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