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Yang D, Wang C, Lu W, Tian X, Sun Y, Peng H. Beneficial effects of melatonin on boar sperm motility and kinematics are mediated by MT1 receptor. Theriogenology 2024; 226:95-103. [PMID: 38870584 DOI: 10.1016/j.theriogenology.2024.06.003] [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: 02/20/2024] [Revised: 06/06/2024] [Accepted: 06/07/2024] [Indexed: 06/15/2024]
Abstract
Melatonin, a hormone synthesized in various tissues, plays a crucial role in modulating sperm characteristics, yet its protective function on boar sperm remains poorly understood. This study aimed to investigate the expression and localization of melatonin-related proteins (AANAT, ASMT, MT1, MT2, and NQO2) in pig tissues, assess the impact of melatonin on pig sperm motility parameters and quality, and elucidate the underlying molecular mechanisms. Our results revealed widespread expression of AANAT, ASMT, MT1, MT2, and NQO2 proteins in pig tissues, particularly in the testis. Specific localization patterns were observed in Leydig cells, reproductive epithelium, and columnar epithelium cells in the testis and cauda epididymis. Additionally, melatonin membrane receptors MT1 and MT2 were detected in boar sperm. Melatonin treatment significantly enhanced boar sperm motility parameters and quality, particularly with 10 nM melatonin treatment. Inhibition of the MT1 receptor, but not the MT2 receptor, resulted in decreased sperm motility, highlighting the pivotal role of the MT1 receptor in mediating melatonin's effects on boar sperm. Metabolomic analysis revealed significant alterations in sperm metabolites following melatonin supplementation, particularly in amino acid metabolism. Overall, our findings provide comprehensive insights into melatonin's mechanisms in improving boar sperm quality, suggesting its potential as a therapeutic agent for enhancing male fertility.
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Affiliation(s)
- Diqi Yang
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, China
| | - Chongchong Wang
- College of Animal Science, Fujian Agriculture and Forestry University, Fujian, Fuzhou, 350002, China
| | - Wenjie Lu
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, China
| | - Xueqi Tian
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, China
| | - Yanyu Sun
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, China
| | - Hui Peng
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, China.
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2
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Cardenas-Padilla AJ, Jimenez-Trejo F, Cerbon M, Chavez-Garcia A, Cruz-Cano NB, Martinez-Torres M, Alcantar-Rodriguez A, Medrano A. Sperm melatonin receptors, seminal plasma melatonin and semen freezability in goats. Theriogenology 2024; 225:98-106. [PMID: 38801791 DOI: 10.1016/j.theriogenology.2024.05.034] [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: 02/08/2024] [Revised: 05/20/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024]
Abstract
Goat bucks are seasonal breeders that show variation in sperm quality, endogenous melatonin (MLT), and presumably in the expression of MLT receptors on the sperm throughout the year, which may modify sperm freezability. The aim of this study was to determine whether sperm freezability is associated with (i) endogenous melatonin levels in seminal plasma and (ii) the expression of sperm plasma membrane melatonin receptors (MT1, MT2). To evaluate this, spermatozoa from seven Saanen goat bucks were cryopreserved throughout the year in Mexico using a standard freezing protocol. Seminal plasma MLT concentrations were determined by ELISA and the expression and localization of MT1 and MT2 were detected by immunocytochemistry and confirmed by western blotting. The recovery rate of progressive motility after thawing was higher in spring than autumn and winter; in contrast, the F pattern (CTC assay) was higher in winter than in the other seasons. A proportional increase in the AR pattern (CTC assay) was smaller in winter than in the other seasons and the proportion of sperm showing high plasma membrane fluidity was higher in spring than in summer and autumn. The seminal plasma MLT concentrations showed no significant interseasonal differences. The MT1 receptor was immunolocalised at the apical region of the sperm head, while MT2 was mainly localised in the neck. The relative expression of MLT receptors showed significant differences between summer and winter for all bands, except at 75 kDa of MT2. In conclusion, there was an association between the relative expression of MT1 and MT2 receptors throughout the year and sperm freezability in goat bucks in México. Post-thaw sperm quality is enhanced in semen samples collected during breeding season.
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Affiliation(s)
- Alberto J Cardenas-Padilla
- Laboratorio de Reproducción Animal, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, 54714, Estado de México, Mexico.
| | | | - Marco Cerbon
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Coyoacán, 04510, Ciudad de México, Mexico.
| | - Araceli Chavez-Garcia
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, Coyoacán, 04510, Ciudad de México, Mexico.
| | - Norma B Cruz-Cano
- Laboratorio de Biología de la Reproducción, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, 54090, Estado de México, Mexico.
| | - Martin Martinez-Torres
- Laboratorio de Biología de la Reproducción, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, 54090, Estado de México, Mexico.
| | - Alicia Alcantar-Rodriguez
- Laboratorio de Reproducción Animal, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, 54714, Estado de México, Mexico.
| | - Alfredo Medrano
- Laboratorio de Reproducción Animal, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, 54714, Estado de México, Mexico.
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Moretti E, Signorini C, Corsaro R, Giamalidi M, Collodel G. Human Sperm as an In Vitro Model to Assess the Efficacy of Antioxidant Supplements during Sperm Handling: A Narrative Review. Antioxidants (Basel) 2023; 12:antiox12051098. [PMID: 37237965 DOI: 10.3390/antiox12051098] [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: 04/06/2023] [Revised: 04/27/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Spermatozoa are highly differentiated cells that produce reactive oxygen species (ROS) due to aerobic metabolism. Below a certain threshold, ROS are important in signal transduction pathways and cellular physiological processes, whereas ROS overproduction damages spermatozoa. Sperm manipulation and preparation protocols during assisted reproductive procedures-for example, cryopreservation-can result in excessive ROS production, exposing these cells to oxidative damage. Thus, antioxidants are a relevant topic in sperm quality. This narrative review focuses on human spermatozoa as an in vitro model to study which antioxidants can be used to supplement media. The review comprises a brief presentation of the human sperm structure, a general overview of the main items of reduction-oxidation homeostasis and the ambivalent relationship between spermatozoa and ROS. The main body of the paper deals with studies in which human sperm have been used as an in vitro model to test antioxidant compounds, including natural extracts. The presence and the synergic effects of different antioxidant molecules could potentially lead to more effective products in vitro and, in the future, in vivo.
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Affiliation(s)
- Elena Moretti
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
| | - Cinzia Signorini
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
| | - Roberta Corsaro
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
| | - Maria Giamalidi
- Department of Genetics and Biotechnology, Faculty of Biology, University of Athens, 15701 Athens, Greece
| | - Giulia Collodel
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
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Feng C, Yang Y, Chen L, Guo R, Liu H, Li C, Wang Y, Dong P, Li Y. Prevalence and Characteristics of Erectile Dysfunction in Obstructive Sleep Apnea Patients. Front Endocrinol (Lausanne) 2022; 13:812974. [PMID: 35250871 PMCID: PMC8896119 DOI: 10.3389/fendo.2022.812974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/12/2022] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Obstructive sleep apnea (OSA) is a common and severe social problem. Erectile dysfunction (ED) is an important health concern. The prevalence of OSA with ED is increasing, which significantly affects the quality of life and work efficiency of patients. However, the mechanism underlying the comorbidity of these two diseases remains unclear. OBJECTIVES (1) Investigate the prevalence of OSA with ED; (2) analyze the correlation between OSA and ED; and (3) explore the treatment response to and possible mechanism of uvulapalatopharyngoplasty (UPPP) in patients with OSA and ED. This study aims to provide a theoretical basis for the clinical diagnosis and comprehensive treatment of OSA with ED and improve prevention and treatment strategies. MATERIALS AND METHODS In total, 135 subjects were enrolled in the study. Clinical data, polysomnography, the ESS score, Beck anxiety score, Beck depression score, IIEF-5 score and ASEX score were recorded before UPPP and 6 months after UPPP. Sex hormones were measured for all subjects using a Roche electrochemiluminescence analyzer. RESULT The prevalence of OSA with ED was 64.52%, and the prevalence of severe OSA with ED was 73.02%. The prevalence of OSA with ED increased with age, BMI and apnea-hypopnea index (AHI) value. Among polysomnography indicators, minimum oxygen saturation and average oxygen saturation may predict the occurrence of OSA with ED. Improving the patient's anxiety and depression is very important for treating OSA with ED. Sex hormone levels were not significantly correlated with the occurrence of OSA with ED. CONCLUSION ED is a common symptom of OSA patients. This study showed that sex hormone levels in OSA patients with ED were not significantly correlated with the condition, but further investigation of this relationship is worthwhile. It is recommended that the free and combined types of sex hormones be further distinguished during testing because the free type is the active form. UPPP surgical treatment is effective for OSA with ED, and its possible mechanism is protection of the peripheral nerves of the sex organs by improving nighttime hypoxia and arousal.
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Affiliation(s)
- Chen Feng
- Department of Otolaryngology Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Department of Otorhinolaryngology, Qilu Hospital, Shandong University Cheeloo College of Medicine, Jinan, China
- NHC Key Laboratory of Otorhinolaryngology (Shandong University), Jinan, China
| | - Yan Yang
- Department of Otorhinolaryngology, Qilu Hospital, Shandong University Cheeloo College of Medicine, Jinan, China
- NHC Key Laboratory of Otorhinolaryngology (Shandong University), Jinan, China
| | - Lixiao Chen
- Department of Otolaryngology Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ruixiang Guo
- Department of Otorhinolaryngology, Qilu Hospital, Shandong University Cheeloo College of Medicine, Jinan, China
- NHC Key Laboratory of Otorhinolaryngology (Shandong University), Jinan, China
| | - Huayang Liu
- Department of Otorhinolaryngology, Qilu Hospital, Shandong University Cheeloo College of Medicine, Jinan, China
- NHC Key Laboratory of Otorhinolaryngology (Shandong University), Jinan, China
| | - Chaojie Li
- Department of Otorhinolaryngology, Qilu Hospital, Shandong University Cheeloo College of Medicine, Jinan, China
- NHC Key Laboratory of Otorhinolaryngology (Shandong University), Jinan, China
| | - Yan Wang
- Department of Otorhinolaryngology, Qilu Hospital, Shandong University Cheeloo College of Medicine, Jinan, China
- NHC Key Laboratory of Otorhinolaryngology (Shandong University), Jinan, China
| | - Pin Dong
- Department of Otolaryngology Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- *Correspondence: Pin Dong, ; Yanzhong Li,
| | - Yanzhong Li
- Department of Otorhinolaryngology, Qilu Hospital, Shandong University Cheeloo College of Medicine, Jinan, China
- NHC Key Laboratory of Otorhinolaryngology (Shandong University), Jinan, China
- *Correspondence: Pin Dong, ; Yanzhong Li,
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Nikolaev G, Robeva R, Konakchieva R. Membrane Melatonin Receptors Activated Cell Signaling in Physiology and Disease. Int J Mol Sci 2021; 23:ijms23010471. [PMID: 35008896 PMCID: PMC8745360 DOI: 10.3390/ijms23010471] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/28/2021] [Accepted: 12/29/2021] [Indexed: 02/07/2023] Open
Abstract
The pineal hormone melatonin has attracted great scientific interest since its discovery in 1958. Despite the enormous number of basic and clinical studies the exact role of melatonin in respect to human physiology remains elusive. In humans, two high-affinity receptors for melatonin, MT1 and MT2, belonging to the family of G protein-coupled receptors (GPCRs) have been cloned and identified. The two receptor types activate Gi proteins and MT2 couples additionally to Gq proteins to modulate intracellular events. The individual effects of MT1 and MT2 receptor activation in a variety of cells are complemented by their ability to form homo- and heterodimers, the functional relevance of which is yet to be confirmed. Recently, several melatonin receptor genetic polymorphisms were discovered and implicated in pathology-for instance in type 2 diabetes, autoimmune disease, and cancer. The circadian patterns of melatonin secretion, its pleiotropic effects depending on cell type and condition, and the already demonstrated cross-talks of melatonin receptors with other signal transduction pathways further contribute to the perplexity of research on the role of the pineal hormone in humans. In this review we try to summarize the current knowledge on the membrane melatonin receptor activated cell signaling in physiology and pathology and their relevance to certain disease conditions including cancer.
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Affiliation(s)
- Georgi Nikolaev
- Faculty of Biology, Sofia University “St. Kliment Ohridski”, 1504 Sofia, Bulgaria;
- Correspondence:
| | - Ralitsa Robeva
- Department of Endocrinology, Faculty of Medicine, Medical University, 1431 Sofia, Bulgaria;
| | - Rossitza Konakchieva
- Faculty of Biology, Sofia University “St. Kliment Ohridski”, 1504 Sofia, Bulgaria;
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Thomas P, Dong J. (-)-Epicatechin acts as a potent agonist of the membrane androgen receptor, ZIP9 (SLC39A9), to promote apoptosis of breast and prostate cancer cells. J Steroid Biochem Mol Biol 2021; 211:105906. [PMID: 33989703 DOI: 10.1016/j.jsbmb.2021.105906] [Citation(s) in RCA: 13] [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: 12/30/2020] [Revised: 04/19/2021] [Accepted: 04/27/2021] [Indexed: 01/07/2023]
Abstract
(-)-Epicatechin, a flavonoid present in high concentrations in foods such as green tea and cocoa, exerts beneficial and protective effects in numerous disease models, including anti-tumorigenesis and apoptosis in human breast and prostate cancer cells. Potential interactions of (-)-epicatechin and (+)-catechin with the membrane androgen receptor, ZIP9 (SLC39A9), which mediates androgen induction of apoptosis in these cancer cells, were investigated. Both (-)-epicatechin and (+)-catechin were effective competitors of [3H]-testosterone binding to PC-3 prostate cancer cells (nuclear androgen receptor-negative, nAR-null) overexpressing ZIP9 (PC3-ZIP9), with relative binding affinities of 75 % and 28 % that of testosterone, respectively. (-)-Epicatechin (200 nM) mimicked the effects of 100 nM testosterone in inducing apoptosis of PC3-ZIP9 cells, whereas (+)-catechin (concentration range 200 nM-1000 nM) did not significantly increase apoptosis and instead blocked the apoptotic response to testosterone. (-)-Epicatechin also activated androgen-dependent ZIP9 signaling pathways, inducing decreases in cAMP production and elevating intracellular free zinc levels, while (+)-catechin typically lacked these actions. Both (-)-epicatechin and (+)-catechin also bound to cell membranes of MDA-MB-468 breast cancer cells (nAR-null, high ZIP9 expression). MDA-MB-468 cells showed similar apoptotic, cAMP, and free zinc signaling responses to (-)-epicatechin to those observed in PC3-ZIP9 cells, as well as antagonism by (+)-catechin of testosterone-induced apoptosis and modulation of cAMP and caspase-3 levels. Moreover, knockdown of ZIP9 expression in MDA-MB-468 cells with siRNA decreased specific [3H]-testosterone binding of both catechins and blocked the apoptotic and free zinc responses to testosterone and (-)-epicatechin. The results indicate (-)-epicatechin is a potent ZIP9 agonist in breast and prostate cancer cells.
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Affiliation(s)
- Peter Thomas
- Marine Science Institute, University of Texas at Austin, 750 Channel View Drive, Port Aransas, TX, 78373, United States.
| | - Jing Dong
- Marine Science Institute, University of Texas at Austin, 750 Channel View Drive, Port Aransas, TX, 78373, United States
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Zhao F, Whiting S, Lambourne S, Aitken RJ, Sun YP. Melatonin alleviates heat stress-induced oxidative stress and apoptosis in human spermatozoa. Free Radic Biol Med 2021; 164:410-416. [PMID: 33482333 DOI: 10.1016/j.freeradbiomed.2021.01.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 01/05/2021] [Accepted: 01/07/2021] [Indexed: 02/07/2023]
Abstract
Oxidative stress generates a large amount of reactive oxygen species (ROS) and affects sperm quality via damaging sperm DNA and compromising the intracellular homeostasis in human spermatozoa. In assisted reproductive technology (ART), it is substantial to prevent spermatozoa from ROS attack. The pineal hormone melatonin has the natural antioxidant capacity and can scavenge ROS. To the best of our knowledge, however, there are presently no studies investigating if melatonin can protect human spermatozoa from heat-induced oxidative damage. Herein, we induced oxidative stress in human spermatozoa with heat treatment, and determined that melatonin could protect human spermatozoa from heat-induced oxidative stress. We first confirmed that heat stress-induced oxidative stress damaged human spermatozoa by decreasing sperm motility and viability. Furthermore, the pretreatment of human spermatozoa by melatonin was able to alleviate such damage by suppressing sperm mitochondrial ROS generation, increasing mitochondrial membrane potential, reducing the formation of the lipid peroxidation product, 4-HNE, and reducing sperm DNA damage and apoptosis. Collectively, these findings suggest that melatonin is useful as a potential treatment option for male infertility caused by heat-induced oxidative stress.
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Affiliation(s)
- Feifei Zhao
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Sara Whiting
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Sarah Lambourne
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - R John Aitken
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia.
| | - Ying-Pu Sun
- Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Fadl AM, Ghallab ARM, Abou-Ahmed MM, Moawad AR. Melatonin can improve viability and functional integrity of cooled and frozen/thawed rabbit spermatozoa. Reprod Domest Anim 2020; 56:103-111. [PMID: 33145881 DOI: 10.1111/rda.13853] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 11/01/2020] [Indexed: 12/29/2022]
Abstract
Melatonin is known to protect sperm against freezing-inflicted damage in different domestic species. The aim of the study was to evaluate the effect of supplementation of semen extender with melatonin on the quality and DNA integrity of cooled and frozen/thawed rabbit spermatozoa. We also investigated whether the addition of melatonin to the semen extender could improve the fertility of rabbit does artificially inseminated with frozen/thawed semen. Semen samples collected from eight rabbit bucks were pooled and then diluted in INRA-82 supplemented either with (0.5, 1.0 or 1.5 mM) or without (0.0 mM) melatonin. Diluted semen was cooled at 5°C for 24 hr. For cryopreservation and based on the first experiment's best result, semen samples were diluted in INRA-82 in the presence or absence of 1.0 mM melatonin and then frozen in 0.25 ml straws. Following cooling or thawing, sperm quality and DNA integrity were evaluated. Furthermore, the fertility of frozen/thawed semen was investigated after artificial insemination. Supplementation of semen extender with 1.0 mM melatonin improved (p < .05) motility, viability, membrane and acrosome integrities in cooled semen compared with other groups. Sperm quality and DNA integrity were higher (p < .05) in frozen/thawed semen diluted in 1.0 mM melatonin-supplemented extender than in the control group. Conception and birth rates were higher in does inseminated with 1.0 mM melatonin treated semen compared with the controls. In conclusion, supplementation of semen extender with 1.0 mM melatonin improved the quality of cooled and frozen/thawed rabbit spermatozoa. Melatonin can preserve DNA integrity and enhance the fertility of frozen/thawed rabbit spermatozoa.
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Affiliation(s)
- Aya M Fadl
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Abdel Raouf M Ghallab
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Mostafa M Abou-Ahmed
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Adel R Moawad
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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9
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Protective effects of melatonin on male fertility preservation and reproductive system. Cryobiology 2020; 95:1-8. [DOI: 10.1016/j.cryobiol.2020.01.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 01/25/2020] [Indexed: 12/17/2022]
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10
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The Absence of Pineal Melatonin Abolishes the Daily Rhythm of Tph1 (Tryptophan Hydroxylase 1), Asmt (Acetylserotonin O-Methyltransferase), and Aanat (Aralkylamine N-Acetyltransferase) mRNA Expressions in Rat Testes. Mol Neurobiol 2019; 56:7800-7809. [PMID: 31124080 DOI: 10.1007/s12035-019-1626-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 04/25/2019] [Indexed: 10/26/2022]
Abstract
This study examined the effects of pinealectomy in Wistar rats and melatonin replacement therapy on the daily mRNA expression of melatonin (Tph1, Aanat, Asmt, Mt1, Mt2, and Rorα), and steroidogenic (Star, 17βhsd3, and Lhr) related genes as well as clock genes (Rev-erbα, Bmal1, Per1, Per2, Cry1, and Cry2) in testes. The testes of control animals express the Tph1, Aanat, and Asmt and Per2 genes with 24-h rhythms in mRNA, reaching the maximal values during the dark phase. Pinealectomy abolished and melatonin treatment restored the 24-h rhythmicity. Daytime differences in mRNA expression were significant for Star, Lhr, Mt1, Mt2, Rorα, Rev-erbα, Bmal1, Cry1, and Cry2 genes in testes of control rats. Conversely, 17βhsd3 and Per1 mRNA expression did not show a daytime difference in testes of control animals. Pinealectomy abolished the peak time of Mt1 and Mt2 mRNA expression, phase shifted the peak time of Star, Rorα, Rev-erbα, Bmal1, and Cry2 mRNA expression, downregulated the 24-h Lhr mRNA expression, and inverted the peak time of Per1, Per2, and Cry1 mRNA expression to the light phase. The melatonin replacement therapy completely restored the control levels of Lhr, Rev-erbα, and Per1 mRNA expression patterns, partially restored the daily control of Star, Mt2, Rorα, Bmal1, Cry1, and Cry2 mRNA expression but did not re-establish the daily control of Mt1 mRNA expression. This suggests that the daily mRNA expression of these genes is probably driven by pineal melatonin and melatonin treatment restores (partially or completely) the daily control of gene expression patterns.
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11
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Melatonin protects rabbit spermatozoa from cryo-damage via decreasing oxidative stress. Cryobiology 2019; 88:1-8. [PMID: 31034812 DOI: 10.1016/j.cryobiol.2019.04.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 03/28/2019] [Accepted: 04/25/2019] [Indexed: 11/23/2022]
Abstract
Mammalian spermatozoa are highly susceptible to reactive oxygen species (ROS) stress. The aim of the present study was to investigate whether and how melatonin protects rabbit spermatozoa against ROS stress during cryopreservation. Semen was diluted with Tris-citrate-glucose extender in presence of different concentrations of melatonin. It was observed that addition of 0.1 mM melatonin significantly improved spermatozoa motility, membrane integrity, acrosome integrity, mitochondrial membrane potential as well as AMP-activated protein kinase (AMPK) phosphorylation. Meanwhile, the lipid peroxidation (LPO), ROS levels and apoptosis of post-thaw spermatozoa were reduced in presence of melatonin. Interestingly, when fresh spermatozoa were incubated with 100 μM H2O2, addition of 0.1 mM melatonin significantly decreased the oxidative damage compared to the H2O2 treatment, whereas addition of luzindole, an MT1 receptor inhibitor, decrease the effect of melatonin in spermatozoa. It was observed that the glutathione (GSH) content and activities of glutathione peroxidase (GPx), superoxide dismutase (SOD) and catalase (CAT) were significantly increased with addition of melatonin during cryopreservation. In conclusion, addition of melatonin to the freezing extender protects rabbit spermatozoa against ROS attack by enhancing AMPK phosphorylation for increasing the antioxidative defense.
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12
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Sperm physiology varies according to ultradian and infradian rhythms. Sci Rep 2019; 9:5988. [PMID: 30979936 PMCID: PMC6461627 DOI: 10.1038/s41598-019-42430-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 04/01/2019] [Indexed: 11/08/2022] Open
Abstract
The spermatozoon must be physiologically prepared to fertilize the egg, process called capacitation. Human sperm samples are heterogeneous in their ability to capacitate themselves, which leads to variability between samples from the same or different donors, and even along the seasons. Here we studied sperm variation in the capacitation state according to the ability of capacitated spermatozoa to acrosome react upon stimulation (% ARi) and to be recruited by chemotaxis (% Chex). Both indirect indicators of sperm capacitation increased along the incubation time with fluctuations. Those capacitated sperm recruited by chemotaxis showed an ultradian rhythm with a cycle every 2 h, which might be influenced by unknown intrinsic sperm factors. Two infradian rhythms of 12 months for the % ARi and of 6 months for % Chex were observed, which are associated with the joint action of temperature and photoperiod. Thus, to avoid false negative results, human sperm samples are recommended to be incubated for a long period (e.g. 18 h) preferably in spring time. This innovative point of view would lead to better comprehend human reproductive biology and to think experimental designs in the light of sperm cyclicity or to improve sperm aptitude for clinical purposes.
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Martin-Hidalgo D, Bragado MJ, Batista AR, Oliveira PF, Alves MG. Antioxidants and Male Fertility: from Molecular Studies to Clinical Evidence. Antioxidants (Basel) 2019; 8:antiox8040089. [PMID: 30959797 PMCID: PMC6523199 DOI: 10.3390/antiox8040089] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/01/2019] [Accepted: 04/03/2019] [Indexed: 12/20/2022] Open
Abstract
Spermatozoa are physiologically exposed to reactive oxygen species (ROS) that play a pivotal role on several sperm functions through activation of different intracellular mechanisms involved in physiological functions such as sperm capacitation associated-events. However, ROS overproduction depletes sperm antioxidant system, which leads to a condition of oxidative stress (OS). Subfertile and infertile men are known to present higher amount of ROS in the reproductive tract which causes sperm DNA damage and results in lower fertility and pregnancy rates. Thus, there is a growing number of couples seeking fertility treatment and assisted reproductive technologies (ART) due to OS-related problems in the male partner. Interestingly, although ART can be successfully used, it is also related with an increase in ROS production. This has led to a debate if antioxidants should be proposed as part of a fertility treatment in an attempt to decrease non-physiological elevated levels of ROS. However, the rationale behind oral antioxidants intake and positive effects on male reproduction outcome is only supported by few studies. In addition, it is unclear whether negative effects may arise from oral antioxidants intake. Although there are some contrasting reports, oral consumption of compounds with antioxidant activity appears to improve sperm parameters, such as motility and concentration, and decrease DNA damage, but there is not sufficient evidence that fertility rates and live birth really improve after antioxidants intake. Moreover, it depends on the type of antioxidants, treatment duration, and even the diagnostics of the man’s fertility, among other factors. Literature also suggests that the main advantage of antioxidant therapy is to extend sperm preservation to be used during ART. Herein, we discuss ROS production and its relevance in male fertility and antioxidant therapy with focus on molecular mechanisms and clinical evidence.
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Affiliation(s)
- David Martin-Hidalgo
- Unit for Multidisciplinary Research in Biomedicine (UMIB), Laboratory of Cell Biology, Department of Microscopy, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal.
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, 10004 Cáceres, Spain.
| | - Maria Julia Bragado
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, 10004 Cáceres, Spain.
| | | | - Pedro F Oliveira
- Unit for Multidisciplinary Research in Biomedicine (UMIB), Laboratory of Cell Biology, Department of Microscopy, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal.
- i3S-Instituto de Investigação e Inovação em Saúde, University of Porto, 4200-135 Porto, Portugal.
- Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal.
| | - Marco G Alves
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, 10004 Cáceres, Spain.
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14
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Muratoğlu S, Akarca Dizakar OS, Keskin Aktan A, Ömeroğlu S, Akbulut KG. The protective role of melatonin and curcumin in the testis of young and aged rats. Andrologia 2018; 51:e13203. [PMID: 30467869 DOI: 10.1111/and.13203] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/28/2018] [Accepted: 10/29/2018] [Indexed: 01/06/2023] Open
Abstract
We aimed to investigate the effect of melatonin and curcumin treatment on oxidative stress, apoptosis, and histology of testicular tissue in our study. Four groups were formed using young (4 months old, n = 6) and aged (20-22 months old, n = 18) male Wistar albino rats: (a) Young control (1% ethanol:phosphate-buffered saline [PBS], subcutaneously [s.c.]); (b) Aged control (CTL; n = 6, 1% ethanol:PBS, s.c.); (c) Aged Melatonin (MLT; n = 6, 10 mg/kg, s.c.); (d) Aged Curcumin (CUR; n = 6, 30 mg/kg, i.p.). At the end of 21 days, the rats were sacrificed, and testicular tissues were removed. Malondialdehyde (MDA) in the testicular tissue was determined with thiobarbituric acid reactive substances formation, and glutathione (GSH) was determined with modified Ellman method; testosterone level was determined with chemiluminescence method and histologic changes were determined with Haematoxylin-Eosin and Johnsen's scoring; Apoptotic cell counts were made with TUNEL staining of seminiferous tubule in testis. With ageing, MDA level increased in testicular tissue, but GSH and blood testosterone levels decreased. Melatonin treatment for aged rats significantly decreased Paired total testicular/body weight ratio compared to aged control group (p < 0.05). Curcumin treatment for aged rats significantly increased GSH level compared to the aged control group (p < 0.05). Besides, melatonin and curcumin treatment significantly decreased the number of apoptotic cells and significantly increased Johnsen's score (p < 0.05).
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Affiliation(s)
- Saide Muratoğlu
- Department of Physiology, Gazi University School of Medicine, Ankara, Turkey
| | - Ozen S Akarca Dizakar
- Department of Histology and Embryology, Gazi University School of Medicine, Ankara, Turkey
| | - Arzu Keskin Aktan
- Department of Physiology, Gazi University School of Medicine, Ankara, Turkey.,Department of Physical Therapy and Rehabilitation, Health Science Faculty, Nuh Naci Yazgan University, Kayseri, Turkey
| | - Suna Ömeroğlu
- Department of Histology and Embryology, Gazi University School of Medicine, Ankara, Turkey
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15
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Rocco M, Betarelli R, Placci A, Fernández-Novell JM, Spinaci M, Casao A, Muiño-Blanco T, Cebrián-Pérez JA, Peña A, Rigau T, Bonet S, Castillo-Martín M, Yeste M, Rodríguez-Gil JE. Melatonin affects the motility and adhesiveness of in vitro capacitated boar spermatozoa via a mechanism that does not depend on intracellular ROS levels. Andrology 2018; 6:720-736. [PMID: 29858528 DOI: 10.1111/andr.12504] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/09/2018] [Accepted: 04/26/2018] [Indexed: 12/11/2022]
Abstract
This work sought to address the effects of melatonin during in vitro capacitation (IVC) and progesterone-induced acrosome exocytosis (IVAE) in boar spermatozoa. With this purpose, two different experiments were set. In the first one, IVC and IVAE were induced in the absence or presence of melatonin, which was added either at the start of IVC or upon triggering the IVAE with progesterone. Different parameters were evaluated, including intracellular levels of peroxides and superoxides, free cysteine radicals and distribution of specific lectins. While melatonin neither affected most capacitation-associated parameters nor IVAE, it dramatically decreased sperm motility, with a maximal effect at 5 μm. This effect was accompanied by a significant increase in the percentage of agglutinated spermatozoa, which was independent from noticeable changes in the distribution of lectins. Levels of free cysteine radicals were significantly lower in melatonin treatments than in the control after 4 h of incubation in capacitating medium. The second experiment evaluated the effects of melatonin on in vitro fertilising ability of boar spermatozoa. Spermatozoa previously subjected to IVC in the presence of 1 μm melatonin and used for in vitro fertilisation exhibited less ability to bind the zona pellucida (ZP) and higher percentages of monospermy. In conclusion, melatonin affects sperm motility and the stability of nucleoprotein structure and also modulates the ability of in vitro capacitated boar spermatozoa to bind the oocyte ZP. However, such effects do not seem to be related to either its antioxidant properties or changes in the sperm glycocalix.
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Affiliation(s)
- Martina Rocco
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, Bellaterra (Cerdanyola del Vallès), Spain.,Department of Agriculture, Environment and Food Science, University of Molise, Campobasso, Italy
| | - Rafael Betarelli
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, Bellaterra (Cerdanyola del Vallès), Spain.,Department of Veterinary Medicine, Federal University of Lavras, Lavras, Brazil
| | - Anna Placci
- Department of Veterinary Medicine, University of Bologna, Bologna, Italy
| | | | - Marcella Spinaci
- Department of Veterinary Medicine, University of Bologna, Bologna, Italy
| | - Adriana Casao
- Department of Biochemistry and Molecular and Cell Biology, Research Institute of Environmental Sciences, School of Veterinary Medicine, University of Zaragoza, Zaragoza, Spain
| | - Teresa Muiño-Blanco
- Department of Biochemistry and Molecular and Cell Biology, Research Institute of Environmental Sciences, School of Veterinary Medicine, University of Zaragoza, Zaragoza, Spain
| | - José A Cebrián-Pérez
- Department of Biochemistry and Molecular and Cell Biology, Research Institute of Environmental Sciences, School of Veterinary Medicine, University of Zaragoza, Zaragoza, Spain
| | - Alejandro Peña
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
| | - Teresa Rigau
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
| | - Sergi Bonet
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, Girona, Spain
| | - Miriam Castillo-Martín
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, Girona, Spain
| | - Marc Yeste
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, Girona, Spain
| | - Joan E Rodríguez-Gil
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, Bellaterra (Cerdanyola del Vallès), Spain
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16
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Satta V, Manca ME, Torres-Rovira L, Succu S, Mereu P, Nehme M, Epifani G, Gallus M, Berlinguer F, Naitana S, Leoni GG. Effects of melatonin administration on seminal plasma metabolites and sperm fertilization competence during the non-reproductive season in ram. Theriogenology 2018; 115:16-22. [PMID: 29702366 DOI: 10.1016/j.theriogenology.2018.04.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 04/10/2018] [Accepted: 04/13/2018] [Indexed: 10/17/2022]
Abstract
The purpose of this study was to investigate the effects of ram melatonin treatment on the sperm quality and metabolite composition of the seminal plasma in the non-breeding season. Four mature rams were treated with 54 mg melatonin in March subcutaneous implants and four untreated rams served as control. At 0, 30, 90 and 120 days semen samples were collected and sperm, separated from seminal plasma, was evaluated for its capacity to fertilize and produce embryos in vitro. Seminal plasma metabolites were extracted and analyzed by capillary electrophoresis/mass spectroscopy. In the resulting electropherograms, the area corresponding to selected metabolites was extracted and quantified. Ram melatonin treatment affected the in vitro fertilization competence of sperm. Blastocyst output increased until 90 days after treatment (27.20 ± 7.35 vs 54.7 ± 4.4% at 0 and 90 days respectively; p < 0.05) while the untreated group did not show statistical differences. In treated rams, the concentration of melatonin in seminal plasma increased from 3.34 ± 1.70 at day 0-9.65 ± 2.89 AU (Arbitrary Units) after 90 days, then decreased to reach the level of the untreated ram after 120 days (p < 0.05). During 90 days after melatonin treatment, an increase (p < 0.05) in seminal plasma concentrations of glutamic acid (6.28 ± 1.53 vs 14.93 ± 1.53 AU at 0 and 90 days respectively), glutamine (16.89 ± 4.65 vs 54.51 ± 4.65 AU), carnitine (22.97 ± 9.81 vs 104.30 ± 9.81 AU), acetyl-carnitine (48.15 ± 17.32 vs 217.69 ± 17.32 AU), choline (1.82 ± 1.55 vs 14.16 ± 1.55 AU) and arginine (1.31 ± 1.08 vs 14.25 ± 1.08 AU) was detected. Tyrosine concentration increased during 30 days from melatonin treatment (12.79 ± 3.93 vs 27.08 ± 3.04 AU) but at 90 days its levels were similar to the untreated group. In conclusion, melatonin treatment during the non-breeding season improves the concentration of several metabolites in seminal plasma and sperm fertilization competence in Sarda breed ram.
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Affiliation(s)
- Valentina Satta
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Maria Elena Manca
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Laura Torres-Rovira
- Department of Animal Reproduction, INIA, Avda. Puerta de Hierro, 28040, Madrid, Spain
| | - Sara Succu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Paolo Mereu
- Department of Biomedical Sciences, Via Muroni 11, 07100, Sassari, Italy
| | - Michella Nehme
- Lebanese University, Faculty of Agriculture Dekwaneh, Lebanon
| | - Gianpaolo Epifani
- Department of Animal Production, AGRIS Sardegna, Loc. Bonassai, Sassari, Italy
| | - Marilia Gallus
- Department of Animal Production, AGRIS Sardegna, Loc. Bonassai, Sassari, Italy
| | - Fiammetta Berlinguer
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Salvatore Naitana
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy.
| | - Giovanni Giuseppe Leoni
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
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17
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Deng SL, Sun TC, Yu K, Wang ZP, Zhang BL, Zhang Y, Wang XX, Lian ZX, Liu YX. Melatonin reduces oxidative damage and upregulates heat shock protein 90 expression in cryopreserved human semen. Free Radic Biol Med 2017; 113:347-354. [PMID: 29051117 DOI: 10.1016/j.freeradbiomed.2017.10.342] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/11/2017] [Accepted: 10/15/2017] [Indexed: 01/21/2023]
Abstract
Sperm cells can be damaged during the semen cryopreservation process, decreasing their fertilizing ability. Physical damage and oxidative stress may occur during the freeze-thawing process. Antioxidants such as the native antioxidant melatonin can potentially improve cryopreservation outcomes. In this study, we added melatonin to cryoprotectant to examine its effect on frozen-thawed human sperm. We found that adding 0.1mM melatonin to cryoprotectant significantly increased sperm viability (24.80 ± 0.46% vs. 20.97 ± 1.27%, P < 0.05) and membrane integrity (P < 0.05), and decreased intracellular reactive oxygen species and lipid peroxidation damage. Furthermore, mRNA levels of the transcription factor NF-E2-related factor-2 and its downstream genes were significantly increased. Resistance to oxidative stress was enhanced and expression of the antiapoptotic gene Bcl-2 was increased by inclusion of 0.1mM melatonin in the cryoprotectant. Moreover, 0.1mM melatonin upregulated the expression of heat shock protein 90 (HSP90), which confers resistance to stressors in frozen-thawed sperm. Results obtained upon addition of inhibitors of melatonin receptors (luzindole and 4-P-PDOT) and an HSP90 inhibitor (geldanamycin) in the cryoprotectant demonstrated that melatonin promoted HSP90 translation via the melatonin receptor MT1 and increased adenosine triphosphate levels, thus increasing the viability of thawed sperm.
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Affiliation(s)
- Shou-Long Deng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Tie-Cheng Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing, China
| | - Kun Yu
- Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Zhi-Peng Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Bao-Lu Zhang
- State Oceanic Administration, Beijing 100860, China
| | - Yan Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiu-Xia Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Zheng-Xing Lian
- Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Yi-Xun Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
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18
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Gu YP, Yang XM, Duan ZH, Luo P, Shang JH, Xiao W, Tao YX, Zhang DY, Zhang YB, Liu HZ. Inhibition of chemotherapy-induced apoptosis of testicular cells by squid ink polysaccharide. Exp Ther Med 2017; 14:5889-5895. [PMID: 29285137 PMCID: PMC5740781 DOI: 10.3892/etm.2017.5342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 11/10/2016] [Indexed: 12/22/2022] Open
Abstract
The aim of this study was to determine the mechanisms driving the protective effects of squid ink polysaccharide (SIP) against cyclophosphamide (CP)-induced testicular damage, focusing on germ cells. In the testes of mice exposed to CP and/or SIP, the present study examined the levels of reactive oxygen species (ROS) and malondialdehyde, activity of superoxide dismutase levels, protein expression levels of B-cell lymphoma 2 (Bcl2), Bcl2-associated X protein (Bax), and total Caspase 3, activation of p-p38 and p-Akt proteins, and tissue morphology. The findings indicated that CP induced ROS production and oxidative stress, resulting in testicular damage. However, under administration of SIP, oxidative stress was impaired and the testicular toxicity induced by CP was weakened, which implied that SIP may have an important role in preventing chemotherapeutic damage to the male reproductive system via promoting antioxidant ability. Furthermore, the altered expression levels, including the upregulation of Bax and Caspase 3, downregulation of Bcl-2 and the increased Bax/Bcl-2 ratio, indicated that apoptosis occurred in CP exposed testes of mice; however, the alterations were reversed in mice treated with SIP. Moreover, in CP-exposed testes, p38 and Akt proteins were significantly phosphorylated (P<0.05), whereas in the testes of mice co-treated with SIP and CP, phosphorylation of the two proteins was inhibited, demonstrating that the two signalling pathways participated in the regulative processes of the deleterious effects caused by CP, and the preventive effects SIP mediated.
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Affiliation(s)
- Yi-Peng Gu
- Institute of Food Research, Hezhou University, Hezhou, Guangxi 542899, P.R. China.,Department of Applied Chemistry, College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, Guangdong 524088, P.R. China
| | - Xiao-Mei Yang
- Institute of Food Research, Hezhou University, Hezhou, Guangxi 542899, P.R. China
| | - Zhen-Hua Duan
- Institute of Food Research, Hezhou University, Hezhou, Guangxi 542899, P.R. China
| | - Ping Luo
- Department of Applied Chemistry, College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, Guangdong 524088, P.R. China
| | - Jiang-Hua Shang
- Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, Guangxi 530001, P.R. China
| | - Wei Xiao
- Department of Applied Chemistry, College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, Guangdong 524088, P.R. China
| | - Ye-Xing Tao
- Department of Applied Chemistry, College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, Guangdong 524088, P.R. China
| | - Da-Yan Zhang
- Department of Applied Chemistry, College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, Guangdong 524088, P.R. China
| | - Yun-Bo Zhang
- Department of Applied Chemistry, College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, Guangdong 524088, P.R. China
| | - Hua-Zhong Liu
- Department of Applied Chemistry, College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, Guangdong 524088, P.R. China
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19
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Barranco I, Casao A, Perez-Patiño C, Parrilla I, Muiño-Blanco T, Martinez EA, Cebrian-Perez JA, Roca J. Profile and reproductive roles of seminal plasma melatonin of boar ejaculates used in artificial insemination programs. J Anim Sci 2017; 95:1660-1668. [PMID: 28464088 DOI: 10.2527/jas.2016.1286] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Melatonin (MLT) is present in seminal plasma (SP) of mammalian species, including pigs, and it is credited with antioxidant properties. This study aims to identify the sources of variation and the role of boar SP MLT on sperm quality and functionality and in vivo fertilizing ability of liquid-stored semen doses used in AI programs. The SP MLT was measured using an ELISA kit in a total of 219 ejaculates collected from 76 boars, and reproductive records of 5,318 AI sows were recorded. Sperm quality was assessed according to motility (computer-aided sperm analysis) and viability (cytometry evaluation). Sperm functionality was assessed according to the cytometric determination of intracellular HO generation, total and mitochondrial O production, and lipid peroxidation in liquid AI semen samples stored at 17°C over 144 h. The concentration of SP MLT differed among seasons ( < 0.01) and day length periods ( < 0.001) of the year, demonstrating that the ejaculates collected during the increasing day length period (9.80 ± 1.38 pg/mL, range: 2.75-21.94) had lower SP MLT concentrations than those collected during the decreasing day length period (16.32 ± 1.67 pg/mL, range: 5.02-35.61). The SP MLT also differed ( < 0.001) among boars, among ejaculates within boar, and among portions within the ejaculate, demonstrating that SP from the first 10 mL of sperm-rich ejaculate fraction (SRF) exhibited lower MLT concentrations than post-SRF. The SP MLT was negatively related ( < 0.001) to mitochondrial O production in viable sperm. The SP MLT did not differ among AI boars ( = 14) hierarchically grouped according to high and low fertility outcomes. In conclusion, SP MLT concentration in AI boars varies depending on the season of ejaculate collection and differs among boars, ejaculates within boar, and portions within ejaculate. The SP MLT may act at the mitochondrial level of sperm by reducing the generation of O. However, this antioxidant role of SP MLT was not reflected in sperm quality or in vivo fertility outcomes of AI semen doses.
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20
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Vitku J, Kolatorova L, Hampl R. Occurrence and reproductive roles of hormones in seminal plasma. Basic Clin Androl 2017; 27:19. [PMID: 29046808 PMCID: PMC5640966 DOI: 10.1186/s12610-017-0062-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 08/16/2017] [Indexed: 12/13/2022] Open
Abstract
Only 2-5% of seminal fluid is composed of spermatozoa, while the rest is seminal plasma. The seminal plasma is a rich cocktail of organic and inorganic compounds including hormones, serving as a source of nutrients for sperm development and maturation, protecting them from infection and enabling them to overcome the immunological and chemical environment of the female reproductive tract. In this review, a survey of the hormones found in human seminal plasma, with particular emphasis on reproductive hormones is provided. Their participation in fertilization is discussed including their indispensable role in ovum fertilization. The origin of individual hormones found in seminal plasma is discussed, along with differences in the concentrations in seminal plasma and blood plasma. A part of review is devoted to methods of measurement, emphasising particular instances in which they differ from measurement in blood plasma. These methods include separation techniques, overcoming the matrix effect and current ways for end-point measurement, focusing on so called hyphenated techniques as a combination of chromatographic separation and mass spectrometry. Finally, the informative value of their determination as markers of male fertility disorders (impaired spermatogenesis, abnormal sperm parameters, varicocele) is discussed, along with instances where measuring their levels in seminal plasma is preferable to measurement of levels in blood plasma.
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Affiliation(s)
- Jana Vitku
- Department of Steroids and Proteofactors, Institute of Endocrinology, Narodni 8, 116 94 Prague, Czech Republic
| | - Lucie Kolatorova
- Department of Steroids and Proteofactors, Institute of Endocrinology, Narodni 8, 116 94 Prague, Czech Republic
| | - Richard Hampl
- Department of Steroids and Proteofactors, Institute of Endocrinology, Narodni 8, 116 94 Prague, Czech Republic
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21
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Leavy M, Trottmann M, Liedl B, Reese S, Stief C, Freitag B, Baugh J, Spagnoli G, Kölle S. Effects of Elevated β-Estradiol Levels on the Functional Morphology of the Testis - New Insights. Sci Rep 2017; 7:39931. [PMID: 28045098 PMCID: PMC5206739 DOI: 10.1038/srep39931] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 11/28/2016] [Indexed: 11/29/2022] Open
Abstract
Elevated estradiol levels are correlated with male infertility. Causes of hyperestrogenism include diseases of the adrenal cortex, testis or medications affecting the hypothalamus-pituitary-gonadal axis. The aim of our study was to elucidate the effects of estradiol treatment on testicular cellular morphology and function, with reference to the treatment regimen received. Testes samples (n = 9) were obtained post-orchiectomy from male-to-female transsexuals within the age range of 26–52 years. Each patient had a minimum of 1–6 years estradiol treatment. For comparison, additional samples were obtained from microscopically unaltered testicular tissue surrounding tumors (n = 7). The tissues obtained were investigated by stereomicroscopy, histochemistry, scanning electron microscopy (SEM) and immunohistochemistry. Our studies revealed that estradiol treatment significantly decreased the diameter of the seminiferous tubules (p < 0.05) and induced fatty degeneration in the surrounding connective tissue. An increase in collagen fiber synthesis in the extracellular matrix (ECM) surrounding the seminiferous tubules was also induced. Spermatogenesis was impaired resulting in mainly spermatogonia being present. Sertoli cells revealed diminished expression of estrogen receptor alpha (ERα). Both Sertoli and Leydig cells showed morphological alterations and glycoprotein accumulations. These results demonstrate that increased estradiol levels drastically impact the human testis.
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Affiliation(s)
- Myles Leavy
- School of Medicine and Medical Science, University College Dublin (UCD), Dublin, Ireland
| | - Matthias Trottmann
- Department of Urology, Klinikum Grosshadern, University of Munich, Germany
| | - Bernhard Liedl
- Department of Urogenital Surgery, Clinics for Surgery Munich-Bogenhausen, Munich, Germany
| | - Sven Reese
- Institute of Veterinary Anatomy, Histology and Embryology, University of Munich, Germany
| | - Christian Stief
- Department of Urology, Klinikum Grosshadern, University of Munich, Germany
| | - Benjamin Freitag
- Department of Urology, Klinikum Grosshadern, University of Munich, Germany
| | - John Baugh
- School of Medicine and Medical Science, University College Dublin (UCD), Dublin, Ireland
| | - Giulio Spagnoli
- Department of Biomedicine, University Hospital Basel, Switzerland
| | - Sabine Kölle
- School of Medicine and Medical Science, University College Dublin (UCD), Dublin, Ireland
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22
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González-Arto M, Vicente-Carrillo A, Martínez-Pastor F, Fernández-Alegre E, Roca J, Miró J, Rigau T, Rodríguez-Gil JE, Pérez-Pé R, Muiño-Blanco T, Cebrián-Pérez JA, Casao A. Melatonin receptors MT1 and MT2 are expressed in spermatozoa from several seasonal and nonseasonal breeder species. Theriogenology 2016; 86:1958-68. [PMID: 27448693 DOI: 10.1016/j.theriogenology.2016.06.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 06/10/2016] [Accepted: 06/15/2016] [Indexed: 02/07/2023]
Abstract
Melatonin is a ubiquitous and multipurpose molecule, and one of its roles is to regulate reproduction in some seasonal mammals. Our group has previously reported the variation in the melatonin levels in ram seminal plasma along the year and identified MT1 and MT2 receptors in ram spermatozoa. The objective of this study was to elucidate whether the presence of melatonin receptors (MT1 and MT2) in the sperm plasma membrane, and melatonin in the seminal plasma is related to seasonal breeding. For this purpose, the presence of melatonin receptors and the levels of melatonin in seminal plasma have been examined in several species: donkey and stallion as long-day breeders; red deer as a wild, short-day, highly seasonal breeder (epididymal spermatozoa); bull as a conventional nonseasonal breeder; boar as a seasonal breeder under management techniques; and dog as possible a seasonal breeder not regulated by melatonin. We have detected measurable levels of melatonin in the seminal plasma of all ejaculated semen samples (from donkey, stallion, boar, bull, and dog). Also, and for the first time, we have demonstrated the presence of MT1 and MT2 melatonin receptors in the spermatozoa of all these species, regardless their type of reproduction or sperm source (ejaculated or epididymal), using indirect immunofluorescence techniques and Western blotting. Our findings suggest that melatonin and melatonin receptors may be universally distributed in the reproductive system of mammals and that the sperm melatonin receptors cells may not be necessarily related with seasonal reproduction. Furthermore, the presence of MT1 at the cytoplasmic droplet in immature ejaculated stallion spermatozoa found in one sample and epididymal red deer spermatozoa suggests that melatonin may be involved in specific functions during spermatogenesis and sperm maturation, like protecting spermatozoa from oxidative damage, this activity being mediated through these receptors.
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Affiliation(s)
- Marta González-Arto
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | | | | | | | - Jordi Roca
- Departamento de Medicina y Cirugía Animal, Universidad de Murcia, Murcia, Spain
| | - Jordi Miró
- Departamento de Reproducción Animal, Facultad de Veterinaria, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - Teresa Rigau
- Departamento de Reproducción Animal, Facultad de Veterinaria, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - Joan E Rodríguez-Gil
- Departamento de Reproducción Animal, Facultad de Veterinaria, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - Rosaura Pérez-Pé
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - Teresa Muiño-Blanco
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - José A Cebrián-Pérez
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - Adriana Casao
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain.
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Gonzalez-Arto M, Hamilton TRDS, Gallego M, Gaspar-Torrubia E, Aguilar D, Serrano-Blesa E, Abecia JA, Pérez-Pé R, Muiño-Blanco T, Cebrián-Pérez JA, Casao A. Evidence of melatonin synthesis in the ram reproductive tract. Andrology 2016; 4:163-71. [PMID: 26742835 DOI: 10.1111/andr.12117] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 09/04/2015] [Accepted: 09/07/2015] [Indexed: 12/24/2022]
Abstract
Melatonin is a ubiquitous molecule found in a wide range of fluids, one of them being ram seminal plasma, in which it can reach higher concentrations than those found in blood, suggesting an extrapineal secretion by the reproductive tract. In order to identify the source of the melatonin found in ram seminal plasma, we first tried to determine whether the melatonin levels were maintained during the day. For this purpose, melatonin concentrations were measured in seminal plasma obtained from first ejaculates of six rams at 6:00 a.m. in total darkness, at 10:00 a.m. and at 14:00 p.m. The melatonin concentration was higher (p < 0.05) in ejaculates collected at 6:00 a.m. than at 10:00 and 14:00. There was no statistical difference between the latter. To further corroborate an extrapineal secretion of melatonin, the presence of the two key enzymes involved in melatonin synthesis, arylalkylamine-N-acetyltransferase (AANAT) and N-acetylserotonin-O-methyltransferase (ASMT) was analyzed by RT-PCR, q-PCR and Western-blot in ram testes, epididymis, and accessory glands. The RT-PCR showed the presence of the m-RNA codifying both AANAT and ASTM in all the tissues under study, but the q-PCR and Western-blot revealed that gene expression of these enzymes was significantly higher in the testis (p < 0.05). Immunohistochemistry confirmed the presence of AANAT and ASMT in the testis and revealed that they were found in the Leydig cells, spermatocytes, and spermatids. Also, measurable levels of melatonin were found in testicular tissue and the tail of the epididymis. In conclusion, our study indicates that the testes are one of the likely sources of the high levels of melatonin found in ram seminal plasma, at least during the day.
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Affiliation(s)
- M Gonzalez-Arto
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - T R dos S Hamilton
- Dpto. de Reprodução Animal, da Faculdade de Medicina Veterinaria e Zootecnia, da Universidade de São Paulo, São Paulo, Brazil
| | - M Gallego
- Departamento de Patología Animal, Facultad de Veterinaria, Universidad de Zaragoza, Zaragoza, Spain
| | - E Gaspar-Torrubia
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - D Aguilar
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - E Serrano-Blesa
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - J A Abecia
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - R Pérez-Pé
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - T Muiño-Blanco
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - J A Cebrián-Pérez
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
| | - A Casao
- Grupo Biología y Fisiología de la Reproducción, Facultad de Veterinaria, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Zaragoza, Spain
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24
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Liu L, Kang R, Zhao S, Zhang T, Zhu W, Li E, Li F, Wan S, Zhao Z. Sexual Dysfunction in Patients with Obstructive Sleep Apnea: A Systematic Review and Meta-Analysis. J Sex Med 2015; 12:1992-2003. [DOI: 10.1111/jsm.12983] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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25
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Development and validation of LC–MS/MS method for quantification of bisphenol A and estrogens in human plasma and seminal fluid. Talanta 2015; 140:62-67. [DOI: 10.1016/j.talanta.2015.03.013] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 03/03/2015] [Accepted: 03/06/2015] [Indexed: 01/19/2023]
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26
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Effects of electromagnetic fields exposure on plasma hormonal and inflammatory pathway biomarkers in male workers of a power plant. Int Arch Occup Environ Health 2015; 89:33-42. [DOI: 10.1007/s00420-015-1049-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 03/16/2015] [Indexed: 11/25/2022]
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27
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Strauss L, Rantakari P, Sjögren K, Salminen A, Lauren E, Kallio J, Damdimopoulou P, Boström M, Boström PJ, Pakarinen P, Zhang F, Kujala P, Ohlsson C, Mäkelä S, Poutanen M. Seminal vesicles and urinary bladder as sites of aromatization of androgens in men, evidenced by a CYP19A1‐driven luciferase reporter mouse and human tissue specimens. FASEB J 2012; 27:1342-50. [DOI: 10.1096/fj.12-219048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Leena Strauss
- Department of PhysiologyUniversity of TurkuTurkuFinland
- Institute of BiomedicineTurku Center for Disease ModelingUniversity of TurkuTurkuFinland
- Laboratory of Electron MicroscopyUniversity of TurkuTurkuFinland
| | - Pia Rantakari
- Department of PhysiologyUniversity of TurkuTurkuFinland
- Institute of BiomedicineTurku Center for Disease ModelingUniversity of TurkuTurkuFinland
| | - Klara Sjögren
- Center for Bone and Arthritis ResearchInstitute of Medicine, Sahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | - Anu Salminen
- Department of PhysiologyUniversity of TurkuTurkuFinland
| | - Eve Lauren
- Department of PhysiologyUniversity of TurkuTurkuFinland
| | - Jenny Kallio
- Department of PhysiologyUniversity of TurkuTurkuFinland
- Institute of BiomedicineTurku Center for Disease ModelingUniversity of TurkuTurkuFinland
| | - Pauliina Damdimopoulou
- Institute of BiomedicineTurku Center for Disease ModelingUniversity of TurkuTurkuFinland
- Functional Foods ForumUniversity of TurkuTurkuFinland
| | - Minna Boström
- Division of UrologyDepartment of SurgeryTurku University HospitalTurkuFinland
| | - Peter J. Boström
- Division of UrologyDepartment of SurgeryTurku University HospitalTurkuFinland
| | - Pirjo Pakarinen
- Department of PhysiologyUniversity of TurkuTurkuFinland
- Institute of BiomedicineTurku Center for Disease ModelingUniversity of TurkuTurkuFinland
| | - FuPing Zhang
- Department of PhysiologyUniversity of TurkuTurkuFinland
- Institute of BiomedicineTurku Center for Disease ModelingUniversity of TurkuTurkuFinland
| | - Paula Kujala
- Department of PathologyTampere University HospitalTampereFinland
| | - Claes Ohlsson
- Center for Bone and Arthritis ResearchInstitute of Medicine, Sahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | - Sari Mäkelä
- Institute of BiomedicineTurku Center for Disease ModelingUniversity of TurkuTurkuFinland
- Functional Foods ForumUniversity of TurkuTurkuFinland
| | - Matti Poutanen
- Department of PhysiologyUniversity of TurkuTurkuFinland
- Institute of BiomedicineTurku Center for Disease ModelingUniversity of TurkuTurkuFinland
- Center for Bone and Arthritis ResearchInstitute of Medicine, Sahlgrenska AcademyUniversity of GothenburgGothenburgSweden
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28
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Melatonin protects human spermatozoa from apoptosis via melatonin receptor– and extracellular signal–regulated kinase-mediated pathways. Fertil Steril 2011; 96:e159. [DOI: 10.1016/j.fertnstert.2011.08.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 08/08/2011] [Indexed: 02/02/2023]
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29
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Andersen ML, Alvarenga TF, Mazaro-Costa R, Hachul HC, Tufik S. The association of testosterone, sleep, and sexual function in men and women. Brain Res 2011; 1416:80-104. [PMID: 21890115 DOI: 10.1016/j.brainres.2011.07.060] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 07/29/2011] [Accepted: 07/30/2011] [Indexed: 11/29/2022]
Abstract
Testosterone has been the focus of several investigations and review studies in males, but few have addressed its effects on sleep and sexual function, despite evidence of its androgenic effects on circadian activity in both sexes. Studies have been conducted to understand how sleeping increases (and how waking decreases) testosterone levels and how this rhythm can be related to sexual function. This review addresses the inter-relationships among testosterone, sexual function and sleep, including sleep-disordered breathing in both sexes, specifically its effects related to sleep deprivation. In addition, hormonal changes in testosterone that occur in the gonadal and adrenal axis with obstructive sleep apnea and other conditions of chronic sleep deprivation, and which consequently affect sexual life, have also been explored. Nevertheless, hormone-associated sleep disruptions occur across a lifetime, particularly in women. The association between endogenous testosterone and sex, sleep and sleep disturbances is discussed, including the results of clinical trials as well as animal model studies. Evidence of possible pathophysiological mechanisms underlying this relationship is also described. Unraveling the associations of sex steroid hormone concentrations with sleep and sexual function may have clinical implications, as sleep loss reduces testosterone levels in males, and low sex steroid hormone concentrations have been associated with sexual dysfunction.
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Affiliation(s)
- Monica L Andersen
- Departmento de Psicobiologia, Universidade Federal de São Paulo, Brazil.
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30
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The effect of melatonin on the quality of extended boar semen after long-term storage at 17 °C. Theriogenology 2011; 75:1550-60. [DOI: 10.1016/j.theriogenology.2010.12.021] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 12/14/2010] [Accepted: 12/19/2010] [Indexed: 01/01/2023]
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31
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Succu S, Berlinguer F, Pasciu V, Satta V, Leoni GG, Naitana S. Melatonin protects ram spermatozoa from cryopreservation injuries in a dose-dependent manner. J Pineal Res 2011; 50:310-8. [PMID: 21214627 DOI: 10.1111/j.1600-079x.2010.00843.x] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cryopreservation harms spermatozoa at different levels and thus impairs their fertilizing ability. The role of melatonin in protecting spermatozoa from different kind injuries has been widely reported. Thus, this study tested whether the addition of melatonin to ram semen freezing extender could exert a protective effect and ameliorate postthawing sperm function. Melatonin was added to recommended ram extender to yield five different final concentrations: 0.001, 0.01, 0.1, 1, and 10 mm. A control group without melatonin supplementation was included. Spermatozoa viability, motility parameters, and intracellular ATP concentrations were evaluated both before and after cryopreservation, while DNA integrity and in vitro fertilizing ability were evaluated only after thawing. Obtained results showed that the concentration of 1 mm melatonin led to higher viability rates, higher percentages of total motile and progressive motile spermatozoa, higher percentages of spermatozoa with average rapid and medium velocity, higher intracellular ATP concentrations, and higher DNA integrity among semen frozen in control and melatonin-supplemented extenders (P<0.05). In addition, results obtained after the IVF test showed that at 1 mm concentration, melatonin led to a faster first embryonic division and to higher total cleavage rates compared to the other experimental groups (P<0.05). No difference in embryo output was observed among the six experimental groups. In conclusion, the addition of melatonin to ram semen freezing extender protected spermatozoa during cryopreservation in a dose-dependent manner. These results are likely to be mediated by its well-known antioxidant properties, even if a direct action of the indolamine cannot be ruled out.
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Affiliation(s)
- Sara Succu
- Department of Animal Biology, University of Sassari, Sassari, Italy
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32
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Casao A, Mendoza N, Pérez-Pé R, Grasa P, Abecia JA, Forcada F, Cebrián-Pérez JA, Muino-Blanco T. Melatonin prevents capacitation and apoptotic-like changes of ram spermatozoa and increases fertility rate. J Pineal Res 2010; 48:39-46. [PMID: 19919602 DOI: 10.1111/j.1600-079x.2009.00722.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We recently demonstrated the presence of melatonin in ram seminal plasma and differences in its concentration in this fluid between the breeding and nonbreeding season. In this study, we investigate the hypothesis that in vitro treatment with melatonin affects ram sperm quality, and that this is reflected in the in vitro fertilization (IVF) results. Semen from nine rams was collected during the nonreproductive season and treated with 1 mum, 10 nm and 100 pm melatonin. Samples were incubated at 39 degrees C and 5% CO2, and motility, viability, capacitation status and phosphatidylserine (PS) translocation were assessed before and after melatonin addition, either 1 or 3 hr of incubation. Fertility rate of the melatonin-treated samples was determined by means of IVF. Although melatonin failed to affect both sperm kinematic parameters and viability, the exposure of ram spermatozoa to melatonin has a direct effect, decreasing capacitation and PS translocation at 1 mum, and increasing short-term capacitation at 100 pm, which caused an increased oocyte fertilization rate following IVF. Furthermore, cleavage rate of oocytes fertilized with 100 pm melatonin-treated spermatozoa was higher than that with 1 mum melatonin and control samples (P < 0.1). These results prove that melatonin has a direct effect on ram spermatozoa in the nonreproductive season, which can be explained, at least in part, by the melatonin capacity as a reactive oxygen species scavenger and antioxidant. These findings might help to select the optimal experimental conditions for IVF and to improve sperm preservation protocols.
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Affiliation(s)
- Adriana Casao
- Grupo Biología y Fisiología de la Reproducción, Instituto de Investigación de Ciencias Ambientales de Aragón (IUCA), Facultad de Veterinaria, Universidad de Zaragoza, Spain
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33
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Lerchl A. Impossible melatonin data. INTERNATIONAL JOURNAL OF ANDROLOGY 2007; 30:484; author reply 484. [PMID: 17614959 DOI: 10.1111/j.1365-2605.2007.00711_1.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
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Onaran I, Aydemir B, Kiziler AR, Demiryurek T, Alici B. Relationships between levels of estradiol and testosterone in seminal plasma and GSTM1 polymorphism in infertile men. ACTA ACUST UNITED AC 2007; 53:13-6. [PMID: 17364458 DOI: 10.1080/01485010600889134] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Glutathione S-transferase M1 (GSTM1) enzyme serves as a steroid-binding protein by its ability to bind to testosterone and estradiol. The levels of total estradiol and testosterone were measured by using an electrochemiluminescence immunoassay in serum and seminal plasma from 103 subjects including 62 subfertile patients. GSTM1 polymorphism was examined using polymerase chain reaction. The estradiol and testosterone levels in seminal plasma were not different in control and subfertile subjects. No role for GSTM1 enzyme as a steroid-binding protein seemed likely as there was also no significant difference in seminal plasma estradiol and testosterone levels according to GSTM1 genotype. Significant positive correlations were found between seminal estradiol and serum estradiol in infertile males, and between seminal testosterone and serum testosterone in fertile males, independent of GSTM1 genotype. GSTM1 polymorphism is not a genetic risk factor of seminal estradiol and testosterone levels in infertile males although further studies are warranted.
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Affiliation(s)
- I Onaran
- Department of Medical Biology, Istanbul University, Istanbul, Turkey.
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35
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Awad H, Halawa F, Mostafa T, Atta H. Melatonin hormone profile in infertile males. INTERNATIONAL JOURNAL OF ANDROLOGY 2005; 29:409-13. [PMID: 16371109 DOI: 10.1111/j.1365-2605.2005.00624.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Melatonin is a hormone produced by the pineal gland. There is much controversy about its relationship to the male reproductive process. In this study, seminal plasma as well as the serum melatonin levels were studied in different infertile male groups and were correlated with their semen parameters and hormonal levels. One hundred twenty male cases subdivided into six equal groups were consecutively included; fertile normozoospermic men, oligoasthenozoospermia (OA), OA with leucocytospermia, OA with varicocele, non-obstructive azoospermia (NOA) with high serum follicle stimulating hormone (FSH) and NOA with normal FSH. Semen analysis, estimation of melatonin, FSH, testosterone (T) and prolactin (PRL) hormone was carried out. Mean level of serum melatonin was higher than its corresponding seminal concentrations in all investigated groups with a positive correlation between their levels (r = 0.532, p = 0.01). Serum and seminal plasma melatonin levels in all infertile groups were reduced significantly compared with their levels in the fertile group. The lowest concentrations were in OA with leucocytospermia group. Melatonin in both serum and semen demonstrated significant correlation with sperm motility (r = 607, 0.623 respectively, p = 0.01). Serum melatonin correlated positively with serum PRL (r = 0.611, p = 0.01). It may be concluded that melatonin may be involved in the modulation of reproductive neuroendocrine axis in male infertility. Also, low levels of melatonin in semen were observed in infertile groups having reduced sperm motility, leucocytospermia, varicocele and NOA.
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Affiliation(s)
- Hosni Awad
- Andrology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
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