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Amstrup AK, Rejnmark L. Effects of melatonin on blood pressure, arterial stiffness and quality of life in postmenopausal women: A randomized controlled trial. Complement Ther Med 2024; 81:103026. [PMID: 38253213 DOI: 10.1016/j.ctim.2024.103026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 01/24/2024] Open
Abstract
OBJECTIVES Studies suggest that melatonin may promote cardiovascular protection. Previous trials have primarily been performed on co-morbid patients. Little information exist on the effect in postmenopausal women with general good health. DESIGN, PARTICIPANTS AND INTERVENTION In a double-blinded placebo-controlled study, we randomized 41 postmenopausal women to either 10 mg melatonin per day or placebo for 3 months. OUTCOME MEASURES Outcomes of the trial was changes in blood pressure, pulse wave velocity (PWV), and quality of sleep evaluated by Pittsburgh Sleep Quality Index (PSQI). RESULTS Thirty-nine women completed the study. Mean age was 63 years (range 55-75 years). Over the 3 months of the trial, PWV did not differ between groups: Placebo 1.1% (IQR -2.1;9.9) vs. melatonin 0.0% (IQR-9.8;4.1), p = 0.43). The were no significant differences in blood pressure bewteen melatonin and placebo group. Both groups had a pour quality of sleep at baseline (placebo: PSQI 6.0 (IQR 3.3; 8.8) vs. melatonin PSQI 6.0 (IQR 3.0; 10.0), p = 0.94), which did not change in response to treatment. CONCLUSION In healthy postmenopausal women, supplementation with 10 mg melatonin was well-tolerated, but we did not observe any significant improvements in pulse wave velocity, blood pressure or quality of sleep compared with placebo.
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Affiliation(s)
| | - Lars Rejnmark
- Dept. of Endocrinology and Internal Medicine, Aarhus University Hospital, Denmark
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Arabacı Tamer S, Altınoluk T, Emran M, Korkmaz S, Yüksel RG, Baykal Z, Dur ZS, Levent HN, Ural MA, Yüksel M, Çevik Ö, Ercan F, Yıldırım A, Yeğen BÇ. Melatonin Alleviates Ovariectomy-Induced Cardiovascular Inflammation in Sedentary or Exercised Rats by Upregulating SIRT1. Inflammation 2022; 45:2202-2222. [PMID: 35665875 DOI: 10.1007/s10753-022-01685-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/25/2022] [Accepted: 05/16/2022] [Indexed: 11/28/2022]
Abstract
We aimed to evaluate the impact of hormone replacement, melatonin, or exercise alone or their combination on oxidative damage and functional status of heart, brain, and aorta of ovariectomized (OVX) rats and to determine whether the signaling pathway is dependent on sirtuin-1 (SIRT1). Ovariectomized Sprague Dawley rats were orally given either a hormone replacement therapy (1 mg/kg/day,17β estradiol; HRT) or melatonin (4 mg/kg/day) or HRT + melatonin treatments or tap water, while each group was further divided into sedentary and exercise (30 min/5 days/week) groups. After the heart rate measurements and memory tests were performed, trunk blood was collected at the end of the 10th week to determine metabolic parameters in serum samples. Tissue samples of abdominal aorta, heart, and brain were taken for biochemical measurements and histopathological evaluation. Heart rates and memory performances of the OVX rats were not changed significantly by none of the applications. Melatonin treatment or its co-administration with HRT upregulated the expressions of IL-10 and SIRT1, reduced the expressions of IL-6 and TNF-α, and reduced DNA damage in the hearts and thoracic aortae of non-exercised rats. Co-administration of melatonin and HRT to exercised OVX rats reduced inflammatory response and upregulated SIRT1 expression in the aortic and cardiac tissues. The present study suggests that melatonin treatment, either alone or in combination with exercise and/or HRT, upregulates SIRT1 expression and alleviates oxidative injury and inflammation in the hearts and aortas of OVX rats. Melatonin should be considered in alleviating cardiovascular disease risk in postmenopausal women.
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Affiliation(s)
- Sevil Arabacı Tamer
- Department of Physiology, Marmara University School of Medicine, Basibüyük Mah. Maltepe Basibüyük Yolu No. 9/1, 34854, Maltepe, Istanbul, Turkey.,Department of Physiology, Sakarya University School of Medicine, Sakarya, Turkey.,Department of Physiology, Marmara University Institute of Health Sciences, Istanbul, Turkey
| | - Tülin Altınoluk
- Department of Physiology, Marmara University School of Medicine, Basibüyük Mah. Maltepe Basibüyük Yolu No. 9/1, 34854, Maltepe, Istanbul, Turkey.,Department of Physiology, Marmara University Institute of Health Sciences, Istanbul, Turkey
| | - Miray Emran
- Marmara University School of Medicine, Istanbul, Turkey
| | - Seda Korkmaz
- Marmara University School of Medicine, Istanbul, Turkey
| | | | - Zeynep Baykal
- Marmara University School of Medicine, Istanbul, Turkey
| | | | - Hilal Nişva Levent
- Department of Histology & Embryology, Marmara University School of Medicine, Istanbul, Turkey
| | - Mürüvvet Abbak Ural
- Department of Biochemistry, Faculty of Medicine, Aydın Adnan Menderes University, Aydın, Turkey
| | - Meral Yüksel
- Marmara University Vocational School of Health Sciences, Istanbul, Turkey
| | - Özge Çevik
- Department of Biochemistry, Faculty of Medicine, Aydın Adnan Menderes University, Aydın, Turkey
| | - Feriha Ercan
- Department of Histology & Embryology, Marmara University School of Medicine, Istanbul, Turkey
| | - Alper Yıldırım
- Department of Physiology, Marmara University School of Medicine, Basibüyük Mah. Maltepe Basibüyük Yolu No. 9/1, 34854, Maltepe, Istanbul, Turkey
| | - Berrak Ç Yeğen
- Department of Physiology, Marmara University School of Medicine, Basibüyük Mah. Maltepe Basibüyük Yolu No. 9/1, 34854, Maltepe, Istanbul, Turkey.
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Kim Y, Kang HT, Lee DC. Melatonin Supplementation for Six Weeks Had No Effect on Arterial Stiffness and Mitochondrial DNA in Women Aged 55 Years and Older with Insomnia: A Double-Blind Randomized Controlled Study. Int J Environ Res Public Health 2021; 18:ijerph18052561. [PMID: 33806529 PMCID: PMC7967366 DOI: 10.3390/ijerph18052561] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 02/25/2021] [Indexed: 12/04/2022]
Abstract
Melatonin is a hormone produced in the pineal gland that controls sleep and circadian rhythm. Some studies have reported antioxidant and anti-inflammatory effects of melatonin that could benefit cardiometabolic function; however, there is a lack of evidence to support these assertions. The aim of this study was to investigate whether melatonin has beneficial effects on arterial stiffness and mitochondrial deoxyribonucleic acid (DNA) in humans. Methods: This study was designed as a double-blind randomized controlled study. Thirty-eight healthy women aged 55 years and older were enrolled. All had insomnia (Pittsburgh Sleep Quality Index (PSQI) ≥ 5), not treated with any medications, for at least three months before enrollment. Subjects were divided into a melatonin and a placebo group according to melatonin supplementation. The melatonin group took 2 mg melatonin every night for six weeks. The cardio–ankle vascular index (CAVI) was used as an indicator of arterial stiffness. After six weeks, CAVI, mitochondrial DNA (mtDNA) copy number in white blood cells (WBCs), and other metabolic indices, such as homeostasis model assessment of insulin resistance (HOMA-IR), were checked. Results: Sleep quality index using PSQI was improved in the melatonin group from a score of 11 to 8 (p = 0.01), but did not change significantly in the control group. However, there was no significant intergroup difference in PSQI. Systolic blood pressure (SBP) decreased in the melatonin group from 135 to 128 mmHg (p = 0.015), while remaining stable in the placebo group. Right CAVI, mitochondrial DNA copy number, and HOMA-IR were not altered in either group. There were no intergroup differences in CAVI, mtDNA, HOMA-IR, or SBP between baseline and week six. Conclusions: We found no evidence that melatonin supplementation improved cardiometabolic parameters like arterial stiffness, mtDNA, or insulin resistance compared to the placebo between baseline and week six. Sleep quality was improved in the melatonin group. Further research, including longer-term studies with higher doses of melatonin, is warranted.
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Affiliation(s)
- Yonghwan Kim
- Department of Family Medicine, Chungbuk National University Hospital, Cheongju 28644, Korea; (Y.K.); (H.-T.K.)
- Department of Medicine, Graduate School, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Hee-Taik Kang
- Department of Family Medicine, Chungbuk National University Hospital, Cheongju 28644, Korea; (Y.K.); (H.-T.K.)
- Department of Family Medicine, Chungbuk National University College of Medicine, Cheongju 28644, Korea
| | - Duk-Chul Lee
- Department of Family Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul 03722, Korea
- Correspondence: ; Tel.: +82-2228-2330
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