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Mineiro R, Cardoso MR, Pinheiro JV, Cipolla-Neto J, do Amaral FG, Quintela T. Overlapping action of melatonin and female reproductive hormones-Understand the impact in pregnancy and menopause. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2024; 142:163-190. [PMID: 39059985 DOI: 10.1016/bs.apcsb.2024.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
Melatonin is an indolamine secreted to circulation by the pineal gland according to a circadian rhythm. Melatonin levels are higher during nighttime, and the principal function of this hormone is to organize the temporal night and day distribution of physiological adaptive processes. Besides hormonal pineal production, melatonin is synthesized in various organs and tissues like the ovaries or the placenta for local utilization. In addition to its function as a circadian messenger, melatonin is also associated with many physiological functions. For example, melatonin has antioxidant properties and is involved in the regulation of energy and bone metabolism, and reproduction. Melatonin impacts several stages of reproduction and the action across the hypothalamus-pituitary-gonadal axis is well described. However, it is not well understood how those actions impact the female reproductive hormones secretion nor the consequent physiological outcomes. Thus, the first part of this chapter describes the regulation of female reproductive hormone synthesis by melatonin. Moreover, melatonin and female reproductive hormones have coincident physiological functions. Life stages like pregnancy or menopause are characterized by alterations in the reproductive hormones secretion that may be associated with certain physiological stages. Therefore, the second part discusses whether melatonin fluctuations could have an overlapping role with reproductive hormones in contributing to clinical outcomes associated with pregnancy and menopause.
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Affiliation(s)
- Rafael Mineiro
- CICS-UBI-Health Sciences Research Centre, Universidade da Beira Interior, Covilhã, Portugal
| | | | - João Vieira Pinheiro
- CICS-UBI-Health Sciences Research Centre, Universidade da Beira Interior, Covilhã, Portugal
| | - José Cipolla-Neto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Telma Quintela
- CICS-UBI-Health Sciences Research Centre, Universidade da Beira Interior, Covilhã, Portugal; Instituto Politécnico da Guarda, Guarda, Portugal.
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Wei CY, Zhang X, Si LN, Shu WH, Jiang SN, Ding PJ, Cheng LY, Sun TC, Yang SH. Melatonin activates Nrf2/HO-1 signalling pathway to antagonizes oxidative stress-induced injury via melatonin receptor 1 (MT1) in cryopreserved mice ovarian tissue. Reprod Domest Anim 2024; 59:e14598. [PMID: 38881434 DOI: 10.1111/rda.14598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 04/12/2024] [Accepted: 05/05/2024] [Indexed: 06/18/2024]
Abstract
Our previous research has shown that melatonin (MLT) can reduce cryopreserved ovarian damage in mice. Yet, the molecular mechanism of MLT protection is still unclear. Some studies have shown that melatonin receptor 1 (MT1) is very important for animal reproductive system. To evaluate whether MLT exerts its protective effect on cryopreserved mice ovarian tissue via MT1, we added antagonist of MT1/MT2 (Luzindor) or antagonist of MT2 (4P-PDOT) to the freezing solution, followed by cryopreservation and thawing of ovarian tissue. The levels of total superoxide dismutase (T-SOD), catalase (CAT), nitric oxide (NO) and malondialdehyde (MDA) were detected. Besides, by using RT-PCR and Western blotting, the expression of Bcl-2, Bax and Nrf2/HO-1 signalling pathway-related proteins was detected. These findings demonstrated that compared with the melatonin group, the addition of Luzindor increased apoptosis, NO and MDA activities, decreased CAT and T-SOD activities and inhibited Nrf2/HO-1 signalling pathway. In conclusion, melatonin can play a protective role in cryopreserved ovarian tissue of mice through MT1 receptor.
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Affiliation(s)
- Chen Yang Wei
- Faculty of Graduate Studies, Chengde Medical University, Chengde, Hebei, China
- Department of Human Anatomy, Chengde Medical University, Chengde, Hebei, China
| | - Xin Zhang
- Faculty of Graduate Studies, Chengde Medical University, Chengde, Hebei, China
- Department of Human Anatomy, Chengde Medical University, Chengde, Hebei, China
| | - Li Na Si
- Faculty of Graduate Studies, Chengde Medical University, Chengde, Hebei, China
- Department of Human Anatomy, Chengde Medical University, Chengde, Hebei, China
| | - Wei Han Shu
- Faculty of Graduate Studies, Chengde Medical University, Chengde, Hebei, China
- Department of Immunology, Chengde Medical University, Chengde, Hebei, China
| | - Sheng Nan Jiang
- Faculty of Graduate Studies, Chengde Medical University, Chengde, Hebei, China
- Department of Immunology, Chengde Medical University, Chengde, Hebei, China
| | - Pei Jian Ding
- Department of Gastrointestinal Surgery, Affiliated Hospital of Chengde Medical University, Chengde, Hebei, China
| | - Lu Yang Cheng
- Faculty of Graduate Studies, Chengde Medical University, Chengde, Hebei, China
- Department of Immunology, Chengde Medical University, Chengde, Hebei, China
| | - Tie Cheng Sun
- HLA Laboratory, Beijing Red Cross Blood Center, Beijing, China
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University International Hospital, Beijing, China
| | - Song He Yang
- Faculty of Graduate Studies, Chengde Medical University, Chengde, Hebei, China
- Department of Human Anatomy, Chengde Medical University, Chengde, Hebei, China
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Basini G, Grasselli F. Role of Melatonin in Ovarian Function. Animals (Basel) 2024; 14:644. [PMID: 38396612 PMCID: PMC10885985 DOI: 10.3390/ani14040644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/12/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
Melatonin is a hormone mainly produced by the pineal gland in the absence of light stimuli. The light, in fact, hits the retina, which sends a signal to the suprachiasmatic nucleus, which inhibits the synthesis of the hormone by the epiphysis. Mostly by interacting with MT1/MT2 membrane receptors, melatonin performs various physiological actions, among which are its regulation of the sleep-wake cycle and its control of the immune system. One of its best known functions is its non-enzymatic antioxidant action, which is independent from binding with receptors and occurs by electron donation. The hormone is also an indicator of the photoperiod in seasonally reproducing mammals, which are divided into long-day and short-day breeders according to the time of year in which they are sexually active and fertile. It is known that melatonin acts at the hypothalamic-pituitary-gonadal axis level in many species. In particular, it inhibits the hypothalamic release of GnRH, with a consequent alteration of FSH and LH levels. The present paper mainly aims to review the ovarian effect of melatonin.
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Affiliation(s)
- Giuseppina Basini
- Dipartimento di Scienze Medico-Veterinarie, Università degli Studi di Parma, 43126 Parma, Italy;
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