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Franko N, Kodila A, Sollner Dolenc M. Adverse outcomes of the newly emerging bisphenol A substitutes. CHEMOSPHERE 2024; 364:143147. [PMID: 39168390 DOI: 10.1016/j.chemosphere.2024.143147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 08/07/2024] [Accepted: 08/19/2024] [Indexed: 08/23/2024]
Abstract
BPA and its analogues are facing increasingly stringent regulations restricting their use due to the increasing knowledge of their harmful effects. It is therefore expected that novel BPA analogues and alternatives will replace them in plastic products, cans and thermal paper to circumvent restrictions imposed by legislation. This raises concerns about the safety of "BPA-free" products, as they contain BPA substitutes whose safety has not been sufficiently assessed prior to their market introduction. The regulatory agencies have recognised BPAP, BPBP, BPC2, BPE, BPFL, BPG, BPP, BPPH, BPS-MAE, BPS-MPE, BP-TMC, BPZ and the alternatives BTUM, D-90, UU and PF201 as compound with insufficient data regarding their safety. We demonstrate that the mentioned compounds are present in consumer products, food and the environment, thus exhibiting toxicological risk not only to humans, but also to other species where their toxic effects have already been described. Results of in silico, in vitro and in vivo studies examining the endocrine disruption and other effects of BPA analogues show that they disrupt the endocrine system by targeting various nuclear receptors, impairing reproductive function and causing toxic effects such as hepatotoxicity, altered behaviour and impaired reproductive function. In vitro and in vivo data on BPA alternatives are literally non-existent, although these compounds are already present in commonly used thermal papers. However, in silico studies predicted that they might cause adverse effects as well. The aim of this article is to comprehensively collate the information on selected BPA substitutes to illustrate their potential toxicity and identify safety gaps.
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Affiliation(s)
- Nina Franko
- University of Ljubljana, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia.
| | - Anja Kodila
- University of Ljubljana, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia.
| | - Marija Sollner Dolenc
- University of Ljubljana, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia.
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2
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Bartkowiak-Wieczorek J, Jaros A, Gajdzińska A, Wojtyła-Buciora P, Szymański I, Szymaniak J, Janusz W, Walczak I, Jonaszka G, Bienert A. The Dual Faces of Oestrogen: The Impact of Exogenous Oestrogen on the Physiological and Pathophysiological Functions of Tissues and Organs. Int J Mol Sci 2024; 25:8167. [PMID: 39125736 PMCID: PMC11311417 DOI: 10.3390/ijms25158167] [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: 06/09/2024] [Revised: 07/18/2024] [Accepted: 07/25/2024] [Indexed: 08/12/2024] Open
Abstract
Oestrogen plays a crucial physiological role in both women and men. It regulates reproductive functions and maintains various non-reproductive tissues through its receptors, such as oestrogen receptor 1/oestrogen receptor α (ESR1/Erα), oestrogen receptor 2/oestrogen receptor β (ESR2/Erβ), and G protein-coupled oestrogen receptor 1 (GPER). This hormone is essential for the proper functioning of women's ovaries and uterus. Oestrogen supports testicular function and spermatogenesis in men and contributes to bone density, cardiovascular health, and metabolic processes in both sexes. Nuclear receptors Er-α and Er-β belong to the group of transcription activators that stimulate cell proliferation. In the environment, compounds similar in structure to the oestrogens compete with endogenous hormones for binding sites to receptors and to disrupt homeostasis. The lack of balance in oestrogen levels can lead to infertility, cancer, immunological disorders, and other conditions. Exogenous endocrine-active compounds, such as bisphenol A (BPA), phthalates, and organic phosphoric acid esters, can disrupt signalling pathways responsible for cell division and apoptosis processes. The metabolism of oestrogen and its structurally similar compounds can produce carcinogenic substances. It can also stimulate the growth of cancer cells by regulating genes crucial for cell proliferation and cell cycle progression, with long-term elevated levels linked to hormone-dependent cancers such as breast cancer. Oestrogens can also affect markers of immunological activation and contribute to the development of autoimmune diseases. Hormone replacement therapy, oral contraception, in vitro fertilisation stimulation, and hormonal stimulation of transgender people can increase the risk of breast cancer. Cortisol, similar in structure to oestrogen, can serve as a biomarker associated with the risk of developing breast cancer. The aim of this review is to analyse the sources of oestrogens and their effects on the endogenous and exogenous process of homeostasis.
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Affiliation(s)
- Joanna Bartkowiak-Wieczorek
- Physiology Department, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.G.); (P.W.-B.); (I.S.); (J.S.); (W.J.); (I.W.); (G.J.)
| | - Agnieszka Jaros
- Department of Clinical Pharmacy and Biopharmacy, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.J.); (A.B.)
| | - Anna Gajdzińska
- Physiology Department, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.G.); (P.W.-B.); (I.S.); (J.S.); (W.J.); (I.W.); (G.J.)
| | - Paulina Wojtyła-Buciora
- Physiology Department, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.G.); (P.W.-B.); (I.S.); (J.S.); (W.J.); (I.W.); (G.J.)
- Department of Social Medicine and Public Health, Calisia University, 62-800 Kalisz, Poland
| | - Igor Szymański
- Physiology Department, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.G.); (P.W.-B.); (I.S.); (J.S.); (W.J.); (I.W.); (G.J.)
| | - Julian Szymaniak
- Physiology Department, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.G.); (P.W.-B.); (I.S.); (J.S.); (W.J.); (I.W.); (G.J.)
| | - Wojciech Janusz
- Physiology Department, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.G.); (P.W.-B.); (I.S.); (J.S.); (W.J.); (I.W.); (G.J.)
| | - Iga Walczak
- Physiology Department, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.G.); (P.W.-B.); (I.S.); (J.S.); (W.J.); (I.W.); (G.J.)
| | - Gabriela Jonaszka
- Physiology Department, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.G.); (P.W.-B.); (I.S.); (J.S.); (W.J.); (I.W.); (G.J.)
| | - Agnieszka Bienert
- Department of Clinical Pharmacy and Biopharmacy, Poznan University of Medical Sciences, 61-701 Poznan, Poland; (A.J.); (A.B.)
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Beszterda-Buszczak M, Kasperkowiak M, Teżyk A, Augustynowicz N, Frański R. Mass Spectrometric Study of the Most Common Potential Migrants Extractible from the Inner Coatings of Metallic Beverage Cans. Foods 2024; 13:2025. [PMID: 38998531 PMCID: PMC11241440 DOI: 10.3390/foods13132025] [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: 05/25/2024] [Revised: 06/18/2024] [Accepted: 06/25/2024] [Indexed: 07/14/2024] Open
Abstract
Population exposure to endocrine disrupting chemical- bisphenols, which are used commonly in food containers and drinking water pipes in Europe, is above acceptable health and safety levels, according to updated research data. In order to evaluate the most abundant potential migrants in canned sweetened beverages marketed in Poland, we performed the HPLC-MS screening test of the migrants present in the can coating material. The analyzed samples represented the three top-ranked companies of the global soft drink market; it is reasonable to assume that the obtained data are of global validity. The tested can coatings and beverages contained bisphenols conjugates such as five butoxyethanol (BuOEtOH) adducts with bisphenol A diglycidyl ether (BADGE), one butoxyethanol adduct with bisphenol A monoglycidyl ether (BAMGE), and cyclo-di-BADGE. The performed HPLC-MS/MS analysis in the MRM mode enabled evaluation of the concentrations of the detected conjugates in canned beverages which were found to be very low, namely at the level of 1 µg/L. On the other hand, the high consumption of canned beverages may yield a risk associated with the presence of these compounds in the diet. The subsequent HPLC-QTOF-MS/MS experiments allowed, for the first time, a detailed determination of the fragmentation pathways of the detected migrants as well as detection of the isomers of the two migrants, namely BADGE + BuOEtOH and BADGE + BuOEtOH + HCl.
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Affiliation(s)
- Monika Beszterda-Buszczak
- Department of Food Biochemistry and Analysis, Poznań University of Life Sciences, Mazowiecka 48, 60-623 Poznań, Poland;
| | - Małgorzata Kasperkowiak
- Centre for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland;
| | - Artur Teżyk
- Department of Forensic Medicine, Poznań University of Medical Sciences, Rokietnicka 10, 60-806 Poznań, Poland;
| | - Natalia Augustynowicz
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland;
| | - Rafał Frański
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland;
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He Y, Wang B, Huang J, Zhang D, Yuan Y. Environmental pollutants and male infertility: Effects on CatSper. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 277:116341. [PMID: 38653022 DOI: 10.1016/j.ecoenv.2024.116341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 04/07/2024] [Accepted: 04/15/2024] [Indexed: 04/25/2024]
Abstract
Infertility is a growing health concern among many couples worldwide. Men account for half of infertility cases. CatSper, a sperm-specific Ca2+ channel, is expressed on the cell membrane of mammalian sperm. CatSper plays an important role in male fertility because it facilitates the entry of Ca2+ necessary for the rapid change in sperm motility, thereby allowing it to navigate the hurdles of the female reproductive tract and successfully locate the egg. Many pollutants present in the environment have been shown to affect the functions of CatSper and sperm, which is a matter of capital importance to understanding and solving male infertility issues. Environmental pollutants can act as partial agonists or inhibitors of CatSper or exhibit a synergistic effect. In this article, we briefly describe the structure, functions, and regulatory mechanisms of CatSper, and discuss the body of literature covering the effects of environmental pollutants on CatSper.
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Affiliation(s)
- Yuxin He
- Nanchang University Queen Mary School, Jiangxi Medical College of Nanchang University, Nanchang 330031, China
| | - Binhui Wang
- School of Basic Medical Sciences, Nanchang University, Nanchang 330006, China
| | - Jian Huang
- Clinical Medical Experimental Center, Nanchang University, Nanchang 330031, China; Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang 330006, China
| | - Dalei Zhang
- School of Basic Medical Sciences, Nanchang University, Nanchang 330006, China; Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang 330006, China
| | - Yangyang Yuan
- Clinical Medical Experimental Center, Nanchang University, Nanchang 330031, China; Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang 330006, China.
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5
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Xue S, Li X, Zhou S, Zhang J, Sun K, Peng X, Chen N, Dong M, Jiang T, Chen Y, Yan W. Effects and mechanisms of endocrine disruptor bisphenol AF on male reproductive health: A mini review. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 276:116300. [PMID: 38583312 DOI: 10.1016/j.ecoenv.2024.116300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/26/2024] [Accepted: 04/03/2024] [Indexed: 04/09/2024]
Abstract
Bisphenol AF (BPAF), an analogue of bisphenol A (BPA), is commonly found in manufacturing industries and known for its endocrine-disrupting properties. Despite potential similarities in adverse effects with BPA, limited toxicological data exist specifically for BPAF and its impact on male reproductive physiology. This mini-review aims to elucidate the influence of BPAF on the male reproductive system, focusing on estrogenic effects, effects on the hypothalamus-pituitary-gonad (HPG) axis, steroidogenesis, spermatogenesis, and transgenerational reproductive toxicity. Additionally, we outline the current insights into the potential mechanisms underlying BPAF-induced male reproductive disorders. BPAF exposure, either directly or maternally, has been associated with detrimental effects on male reproductive functions, including damage to the blood-testis barrier (BTB) structure, disruptions in steroidogenesis, testis dysfunction, decreased anogenital distance (AGD), and defects in sperm and semen quality. Mechanistically, altered gene expression in the HPG axis, deficits in the steroidogenesis pathway, activation of the aromatase pathway, cascade effects induced by reactive oxygen species (ROS), activation of ERK signaling, and immunological responses collectively contribute to the adverse effects of BPAF on the male reproductive system. Given the high prevalence of male reproductive issues and infertility, along with the widespread environmental distribution of bisphenols, this study provides valuable insights into the negative effects of BPAF. The findings underscore the importance of considering the safe use of this compound, urging further exploration and regulatory attention to decrease potential risks associated with BPAF exposure.
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Affiliation(s)
- Senlin Xue
- Department of Key Laboratory, Affiliated hospital of Nantong University, Changshu 215500, PR China
| | - Xiaotian Li
- Xuzhou Engineering Research Center of Medical Genetics and Transformation, Key Laboratory of Genetic Foundation and Clinical Application, Department of Genetics, School of life science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, PR China
| | - Shenrui Zhou
- Xuzhou Engineering Research Center of Medical Genetics and Transformation, Key Laboratory of Genetic Foundation and Clinical Application, Department of Genetics, School of life science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, PR China
| | - Ji Zhang
- Cancer and Anticancer Drug Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, PR China
| | - Kun Sun
- Xuzhou Engineering Research Center of Medical Genetics and Transformation, Key Laboratory of Genetic Foundation and Clinical Application, Department of Genetics, School of life science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, PR China
| | - Xin Peng
- Xuzhou Engineering Research Center of Medical Genetics and Transformation, Key Laboratory of Genetic Foundation and Clinical Application, Department of Genetics, School of life science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, PR China
| | - Nannan Chen
- Xuzhou Engineering Research Center of Medical Genetics and Transformation, Key Laboratory of Genetic Foundation and Clinical Application, Department of Genetics, School of life science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, PR China
| | - Mengmeng Dong
- Xuzhou Engineering Research Center of Medical Genetics and Transformation, Key Laboratory of Genetic Foundation and Clinical Application, Department of Genetics, School of life science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, PR China
| | - Tingwang Jiang
- Department of Key Laboratory, Affiliated hospital of Nantong University, Changshu 215500, PR China
| | - Yang Chen
- Xuzhou Engineering Research Center of Medical Genetics and Transformation, Key Laboratory of Genetic Foundation and Clinical Application, Department of Genetics, School of life science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, PR China.
| | - Wei Yan
- Xuzhou Engineering Research Center of Medical Genetics and Transformation, Key Laboratory of Genetic Foundation and Clinical Application, Department of Genetics, School of life science, Xuzhou Medical University, Xuzhou, Jiangsu 221004, PR China.
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6
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Jeseta M, Kalina J, Franzova K, Fialkova S, Hosek J, Mekinova L, Crha I, Kempisty B, Ventruba P, Navratilova J. Cross sectional study on exposure to BPA and its analogues and semen parameters in Czech men. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 345:123445. [PMID: 38325504 DOI: 10.1016/j.envpol.2024.123445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 02/09/2024]
Abstract
Exposure to bisphenols has been found to have adverse effects on male reproductive function in animals. Human exposure to bisphenols is widespread. Bisphenol A (BPA) and its analogues, including bisphenol S (BPS), bisphenol F (BPF), and bisphenol AF (BPAF) are utilized in various consumer products such as food contact materials and dental resins. The effects of these compounds on male fertility and spermatogenesis are unclear and findings from human studies are inconsistent. In this cross-sectional study, we evaluated the influence of BPA, BPS, BPF, BPAF (BPs) measured in semen on number of spermatozoa, total motility, progressive motility, morphology, and DNA fragmentation. We also examined the association of bisphenols (BPs) exposure with patients' occupation. A total of 358 patients aged 17-62 years with BMI 18-42 were included in the study from 2019 to 2021. BPs were extracted using solvent extraction followed by preconcentration step and determined by high-performance liquid chromatography and tandem mass spectrometry (LC/MSMS). Bisphenols were detected in 343 from 349 analysed samples (98.3% of all the samples). In 6 samples, the concentration of all BPs was under the limit of detection and in 20 samples under the limit of quantification. We did not find a statistically significant relationship between occupation and BPs. However, we observed significant correlations between the concentration of BPA and a lower motility and normal morphology. For BPS, a significant correlation with a lower ejaculate volume and a lower total sperm count was found. BPF and BPAF were detected only in 14.3% and 23.9% of samples, respectively. For BPF and BPAF, no significant correlations with spermiogram parameters were observed. Our results show that BPs are widespread in the male population (more than 90% of analysed samples), independently of an occupation and in case of BPA and BPS having a negative impact on spermiogram parameters.
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Affiliation(s)
- Michal Jeseta
- Department of Gynecology and Obstetrics, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic; Department of Veterinary Sciences, Czech University of Life Sciences in Prague, Czech Republic.
| | - Jiri Kalina
- RECETOX Centre, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Katerina Franzova
- Department of Gynecology and Obstetrics, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Sandra Fialkova
- RECETOX Centre, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Jan Hosek
- Veterinary Research Institute, Hudcova 70, Brno, Czech Republic; Department of Molecular Pharmacy, Faculty of Pharmacy, Masaryk University, Brno, Czech Republic
| | - Lenka Mekinova
- Department of Gynecology and Obstetrics, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Igor Crha
- Department of Gynecology and Obstetrics, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic; Department of Health Sciences, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Bartosz Kempisty
- Institute of Veterinary Medicine, Nicolaus Copernicus University, Torun, Poland; Department of Human Morphology and Embryology, Wroclaw Medical University, Poland; Physiology Graduate Faculty, North Carolina State University, Raleigh NC, USA
| | - Pavel Ventruba
- Department of Gynecology and Obstetrics, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jana Navratilova
- RECETOX Centre, Faculty of Science, Masaryk University, Brno, Czech Republic
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Young S, Schiffer C, Wagner A, Patz J, Potapenko A, Herrmann L, Nordhoff V, Pock T, Krallmann C, Stallmeyer B, Röpke A, Kierzek M, Biagioni C, Wang T, Haalck L, Deuster D, Hansen JN, Wachten D, Risse B, Behre HM, Schlatt S, Kliesch S, Tüttelmann F, Brenker C, Strünker T. Human fertilization in vivo and in vitro requires the CatSper channel to initiate sperm hyperactivation. J Clin Invest 2024; 134:e173564. [PMID: 38165034 PMCID: PMC10760960 DOI: 10.1172/jci173564] [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: 06/29/2023] [Accepted: 10/31/2023] [Indexed: 01/03/2024] Open
Abstract
The infertility of many couples rests on an enigmatic dysfunction of the man's sperm. To gain insight into the underlying pathomechanisms, we assessed the function of the sperm-specific multisubunit CatSper-channel complex in the sperm of almost 2,300 men undergoing a fertility workup, using a simple motility-based test. We identified a group of men with normal semen parameters but defective CatSper function. These men or couples failed to conceive naturally and upon medically assisted reproduction via intrauterine insemination and in vitro fertilization. Intracytoplasmic sperm injection (ICSI) was, ultimately, required to conceive a child. We revealed that the defective CatSper function was caused by variations in CATSPER genes. Moreover, we unveiled that CatSper-deficient human sperm were unable to undergo hyperactive motility and, therefore, failed to penetrate the egg coat. Thus, our study provides the experimental evidence that sperm hyperactivation is required for human fertilization, explaining the infertility of CatSper-deficient men and the need of ICSI for medically assisted reproduction. Finally, our study also revealed that defective CatSper function and ensuing failure to hyperactivate represents the most common cause of unexplained male infertility known thus far and that this sperm channelopathy can readily be diagnosed, enabling future evidence-based treatment of affected couples.
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Affiliation(s)
- Samuel Young
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Christian Schiffer
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Alice Wagner
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
- Institute of Reproductive Genetics
| | - Jannika Patz
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Anton Potapenko
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Leonie Herrmann
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Verena Nordhoff
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Tim Pock
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Claudia Krallmann
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | | | | | - Michelina Kierzek
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
- CiM-IMPRS Graduate School
| | - Cristina Biagioni
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Tao Wang
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Lars Haalck
- Institute of Geoinformatics, Computer Vision and Machine Learning Systems, University of Münster, Münster, Germany
| | - Dirk Deuster
- Department of Phoniatrics and Pedaudiology, University Hospital Münster, University of Münster, Münster, Germany
| | - Jan N. Hansen
- Institute of Innate Immunity, Department of Biophysical Imaging, Medical Faculty, University of Bonn, Bonn, Germany
| | - Dagmar Wachten
- Institute of Innate Immunity, Department of Biophysical Imaging, Medical Faculty, University of Bonn, Bonn, Germany
| | - Benjamin Risse
- Institute of Geoinformatics, Computer Vision and Machine Learning Systems, University of Münster, Münster, Germany
- Computer Science Department, University of Münster, Münster, Germany
| | - Hermann M. Behre
- UKM Fertility Centre, University Hospital Münster, Münster, Germany
| | - Stefan Schlatt
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Sabine Kliesch
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | | | - Christoph Brenker
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
| | - Timo Strünker
- Centre of Reproductive Medicine and Andrology, University Hospital Münster, University of Münster, Münster, Germany
- Cells in Motion Interfaculty Centre, University of Münster, Münster, Germany
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8
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Beck AL, Rehfeld A, Mortensen LJ, Lorenzen M, Andersson AM, Juul A, Bentin-Ley U, Krog H, Frederiksen H, Petersen JH, Holmboe SA, Jensen MB. Ovarian follicular fluid levels of phthalates and benzophenones in relation to fertility outcomes. ENVIRONMENT INTERNATIONAL 2024; 183:108383. [PMID: 38109833 DOI: 10.1016/j.envint.2023.108383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 11/10/2023] [Accepted: 12/11/2023] [Indexed: 12/20/2023]
Abstract
BACKGROUND Many endocrine disrupting chemicals (EDCs), for instance phthalates and benzophenones, are associated with adverse fertility outcomes and semen quality parameters. OBJECTIVE To evaluate if concentrations of selected phthalate metabolites and benzophenones measured in follicular fluid are associated with fertility outcomes (i.e., reproductive hormones, antral follicle count, detected heartbeat at gestational week 7, and live birth) and, in a supplementary study, if measured concentrations of chemicals in follicular fluid can exert biological effects on human spermatozoa. METHODS Overall, 111 couples from a fertility clinic in Denmark contributed with 155 follicular fluid samples. Concentrations of 43 metabolites from 19 phthalates and phthalate substitutes and six benzophenones were measured in follicular fluid using liquid chromatography-tandem mass spectrometry. Multiple linear and logistic regression with an applied generalized estimating equation model allowing more than one measurement per woman assessed the association between follicular EDC levels and fertility outcomes. The assessment of biological effects of individual and mixtures of EDCs on human spermatozoa was conducted through a human sperm cell based Ca2+-fluorimetric assay. RESULTS Benzophenone-3 (BP-3) and seven metabolites of five phthalates were detectable in follicular fluid. Women with metabolites of dibutyl phthalate isomers in the highest tertiles had lower antral follicle count (MiBP: β = -5.35 [95 % CI: -9.06; -2.00], MnBP: β = -5.25 [95 % CI: -9.00; -2.00]) and lower odds for detecting a heartbeat at gestational week 7 (MiBP: OR = 0.35 [95 % CI: 0.14; 0.91], MnBP: OR = 0.39 [95 % CI: 0.13; 1.15]). Mixtures of the measured concentrations of BP-3 and the seven phthalate metabolites induced a small significant increase in the intracellular calcium ion concentration in human spermatozoa from healthy donors (n = 3). DISCUSSION Phthalate metabolites and BP-3 were detectable in follicular fluid and high concentrations of some phthalate metabolites were linked with lower chance of successful fertility treatment outcomes. Chemical mixture concentrations in follicular fluid induced a calcium response in human spermatozoa highlighting possible biological effects at physiologically relevant concentrations.
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Affiliation(s)
- Astrid L Beck
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
| | - Anders Rehfeld
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Li J Mortensen
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Division of Translational Endocrinology, Department of Endocrinology and Internal Medicine, Copenhagen University Hospital - Rigshospitalet, Herlev-Gentofte, Denmark
| | - Mette Lorenzen
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Division of Translational Endocrinology, Department of Endocrinology and Internal Medicine, Copenhagen University Hospital - Rigshospitalet, Herlev-Gentofte, Denmark
| | - Anna-Maria Andersson
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Anders Juul
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Ursula Bentin-Ley
- Dansk Fertilitetsklinik, Seedorffs Vaenge 2, 2000 Frederiksberg, Denmark
| | - Hans Krog
- Dansk Fertilitetsklinik, Seedorffs Vaenge 2, 2000 Frederiksberg, Denmark
| | - Hanne Frederiksen
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Jørgen H Petersen
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Section of Biostatistics, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Stine A Holmboe
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Martin Blomberg Jensen
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Division of Translational Endocrinology, Department of Endocrinology and Internal Medicine, Copenhagen University Hospital - Rigshospitalet, Herlev-Gentofte, Denmark
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Mariani NAP, Silva JV, Fardilha M, Silva EJR. Advances in non-hormonal male contraception targeting sperm motility. Hum Reprod Update 2023; 29:545-569. [PMID: 37141450 DOI: 10.1093/humupd/dmad008] [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: 05/23/2022] [Revised: 03/23/2023] [Indexed: 05/06/2023] Open
Abstract
BACKGROUND The high rates of unintended pregnancy and the ever-growing world population impose health, economic, social, and environmental threats to countries. Expanding contraceptive options, including male methods, are urgently needed to tackle these global challenges. Male contraception is limited to condoms and vasectomy, which are unsuitable for many couples. Thus, novel male contraceptive methods may reduce unintended pregnancies, meet the contraceptive needs of couples, and foster gender equality in carrying the contraceptive burden. In this regard, the spermatozoon emerges as a source of druggable targets for on-demand, non-hormonal male contraception based on disrupting sperm motility or fertilization. OBJECTIVE AND RATIONALE A better understanding of the molecules governing sperm motility can lead to innovative approaches toward safe and effective male contraceptives. This review discusses cutting-edge knowledge on sperm-specific targets for male contraception, focusing on those with crucial roles in sperm motility. We also highlight challenges and opportunities in male contraceptive drug development targeting spermatozoa. SEARCH METHODS We conducted a literature search in the PubMed database using the following keywords: 'spermatozoa', 'sperm motility', 'male contraception', and 'drug targets' in combination with other related terms to the field. Publications until January 2023 written in English were considered. OUTCOMES Efforts for developing non-hormonal strategies for male contraception resulted in the identification of candidates specifically expressed or enriched in spermatozoa, including enzymes (PP1γ2, GAPDHS, and sAC), ion channels (CatSper and KSper), transmembrane transporters (sNHE, SLC26A8, and ATP1A4), and surface proteins (EPPIN). These targets are usually located in the sperm flagellum. Their indispensable roles in sperm motility and male fertility were confirmed by genetic or immunological approaches using animal models and gene mutations associated with male infertility due to sperm defects in humans. Their druggability was demonstrated by the identification of drug-like small organic ligands displaying spermiostatic activity in preclinical trials. WIDER IMPLICATIONS A wide range of sperm-associated proteins has arisen as key regulators of sperm motility, providing compelling druggable candidates for male contraception. Nevertheless, no pharmacological agent has reached clinical developmental stages. One reason is the slow progress in translating the preclinical and drug discovery findings into a drug-like candidate adequate for clinical development. Thus, intense collaboration among academia, private sectors, governments, and regulatory agencies will be crucial to combine expertise for the development of male contraceptives targeting sperm function by (i) improving target structural characterization and the design of highly selective ligands, (ii) conducting long-term preclinical safety, efficacy, and reversibility evaluation, and (iii) establishing rigorous guidelines and endpoints for clinical trials and regulatory evaluation, thus allowing their testing in humans.
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Affiliation(s)
- Noemia A P Mariani
- Department of Biophysics and Pharmacology, Institute of Biosciences of Botucatu, São Paulo State University, Botucatu, Brazil
| | - Joana V Silva
- Department of Medical Sciences, Institute of Biomedicine (iBiMED), University of Aveiro, Aveiro, Portugal
- QOPNA & LAQV, Department of Chemistry, University of Aveiro, Aveiro, Portugal
- Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Margarida Fardilha
- Department of Medical Sciences, Institute of Biomedicine (iBiMED), University of Aveiro, Aveiro, Portugal
| | - Erick J R Silva
- Department of Biophysics and Pharmacology, Institute of Biosciences of Botucatu, São Paulo State University, Botucatu, Brazil
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Davis OS, Truong VB, Hickey KD, Favetta LA. Quality of fresh and cryopreserved bovine sperm is reduced by BPA and BPF exposure. REPRODUCTION AND FERTILITY 2023; 4:RAF-23-0018. [PMID: 37698168 PMCID: PMC10784754 DOI: 10.1530/raf-23-0018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 09/11/2023] [Indexed: 09/13/2023] Open
Abstract
Bisphenol A (BPA) is an endocrine disrupting compound, used as the key monomer of polycarbonate plastics and epoxy resins. BPA has been detected in both humans and farm animals and has been correlated with decreased sperm counts and motility. BPS and BPF are structural analogs of BPA and are increasingly being used in manufacturing as BPA substitutes. In this study we aim to assess the direct outcomes of BPA, BPS and BPF exposure on bovine sperm parameters in vitro to elucidate how they affect sperm quality and fertilization potential, and to assess whether BPS and/or BPF are less harmful than BPA. Sperm from three or more bulls was obtained from either fresh samples or cryopreserved straws and exposed to 0.05 mg/mL of BPA, BPS and BPF in vitro. After 4h incubation, motility, capacitation, apoptosis/necrosis, and mitochondrial membrane potential levels were measured by CASA or computational flow cytometry. Results showed that BPA exposure significantly reduced both fresh and cryopreserved sperm motility, capacitation, viability and mitochondrial membrane potential levels. Furthermore, BPF significantly decreased motility, capacitation and mitochondrial membrane potential in cryopreserved sperm only. BPS did not have any significant effects on any of the parameters measured. Our results suggest that BPA is the most harmful to sperm, while BPF is toxic under certain conditions, and BPS seems to be the least detrimental. Overall, this study provides an understanding of how the ubiquitous environmental chemicals, bisphenols, may impact male fertility even after ejaculation.
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Affiliation(s)
- Ola S Davis
- Reproductive Health and Biotechnology Lab, Department of Biomedical Sciences, OVC, University of Guelph, Guelph, Ontario, Canada
| | - Vivien B Truong
- Reproductive Health and Biotechnology Lab, Department of Biomedical Sciences, OVC, University of Guelph, Guelph, Ontario, Canada
| | - Katie D Hickey
- Department of Research and Development, Semex Alliance, Guelph, Ontario, Canada
| | - Laura A Favetta
- Reproductive Health and Biotechnology Lab, Department of Biomedical Sciences, OVC, University of Guelph, Guelph, Ontario, Canada
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11
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Ke S, Luo T. The Chemosensing Role of CatSper in Mammalian Sperm: An Updated Review. Curr Issues Mol Biol 2023; 45:6995-7010. [PMID: 37754226 PMCID: PMC10528052 DOI: 10.3390/cimb45090442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 08/19/2023] [Accepted: 08/21/2023] [Indexed: 09/28/2023] Open
Abstract
After sperm enter the female reproductive tract, the physicochemical and biochemical microenvironment undergoes significant changes. In particular, the large changes in various ions encountered by sperm may alter the physiology of sperm, ultimately compromising capacitation and fertilization. Thus, the rapid response to environmental variations is vital for sperm functions. For example, Calcium, the most crucial ion for sperm functions, enters into sperm via Ca2+ permeable ion channels. The cation channel of sperm (CatSper) is a sperm-specific, pH-sensitive, and Ca2+-permeable ion channel. It is responsible for the predominant Ca2+ entry in mammalian sperm and is involved in nearly every event of sperm to acquire fertilizing capability. In addition, CatSper also serves as a pivotal polymodal chemosensor in mammalian sperm by responding to multiple chemical cues. Physiological chemicals (such as progesterone, prostaglandins, β-defensins, and odorants) provoke Ca2+ entry into sperm by activating CatSper and thus triggering sperm functions. Additionally, synthetic and natural chemicals (such as medicines, endocrine disrupting chemicals, drugs of abuse, and antioxidants) affect sperm functions by regulating CatSper-dependent Ca2+ signaling. Therefore, understanding the interactions between CatSper and extracellular ligands sheds light on the mechanisms underlying male infertility and offers innovative diagnostic and treatment approaches. This underscores the importance of CatSper as a crucial regulatory target in male reproduction, linking sperm function with the extracellular environment. In conclusion, this review comprehensively summarizes the relevant studies describing the environmental factors that affect CatSper in humans and rodents.
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Affiliation(s)
- Sulun Ke
- Institute of Life Science, Nanchang University, Nanchang 330031, China;
- Queen Mary School, Medical College, Nanchang University, Nanchang 330031, China
| | - Tao Luo
- Institute of Life Science, Nanchang University, Nanchang 330031, China;
- Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang University, Nanchang 330006, China
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12
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Torres-Badia M, Martin-Hidalgo D, Serrano R, Garcia-Marin LJ, Bragado MJ. Bisphenol S Reduces Pig Spermatozoa Motility through Different Intracellular Pathways and Mechanisms than Its Analog Bisphenol A. Int J Mol Sci 2023; 24:ijms24119598. [PMID: 37298548 DOI: 10.3390/ijms24119598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/28/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023] Open
Abstract
Bisphenol A (BPA: 2,3-bis (4-hydroxyphenyl) propane) is an environmental chemical widely used in the manufacturing of epoxy polymers and many thermoplastic consumer products. Serious concerns about its safety led to the development of analogs, such as BPS (4-hydroxyphenyl sulfone). Very limited studies about BPS's impact on reproduction, specifically in spermatozoa, exist in comparison with BPA. Therefore, this work aims to study the in vitro impact of BPS in pig spermatozoa in comparison with BPA, focusing on sperm motility, intracellular signaling pathways and functional sperm parameters. We have used porcine spermatozoa as an optimal and validated in vitro cell model to investigate sperm toxicity. Pig spermatozoa were exposed to 1 and 100 μM BPS or BPA for 3 and 20 h. Both bisphenol S and A (100 μM) significantly reduce pig sperm motility in a time-dependent manner, although BPS exerts a lower and slower effect than BPA. Moreover, BPS (100 μM, 20 h) causes a significant increase in the mitochondrial reactive species, whereas it does not affect sperm viability, mitochondrial membrane potential, cell reactive oxygen species, GSK3α/β phosphorylation or phosphorylation of PKA substrates. However, BPA (100 μM, 20 h) leads to a decrease in sperm viability, mitochondrial membrane potential, GSK3β phosphorylation and PKA phosphorylation, also causing an increase in cell reactive oxygen species and mitochondrial reactive species. These intracellular effects and signaling pathways inhibited might contribute to explaining the BPA-triggered reduction in pig sperm motility. However, the intracellular pathways and mechanisms triggered by BPS are different, and the BPS-caused reduction in motility can be only partially attributed to an increase in mitochondrial oxidant species.
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Affiliation(s)
- Mercedes Torres-Badia
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, 10003 Cáceres, Spain
| | - David Martin-Hidalgo
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, 10003 Cáceres, Spain
- Research Unit, Complejo Hospitalario Universitario de Cáceres, 10003 Cáceres, Spain
| | - Rebeca Serrano
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, 10003 Cáceres, Spain
| | - Luis J Garcia-Marin
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, 10003 Cáceres, Spain
| | - Maria J Bragado
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, 10003 Cáceres, Spain
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ETYEMEZ M, GÜLAY MŞ. The effects of safranal against bisphenol AF on some reproductive parameters in male new zealand rabbits. MEHMET AKIF ERSOY ÜNIVERSITESI VETERINER FAKÜLTESI DERGISI 2022. [DOI: 10.24880/maeuvfd.1138340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
Bisphenol AF (BPAF) is used as an analog of the endocrine disruptor BPA, whereas safranal is a powerful antioxidant obtained from the saffron plant. In the current study, the possible effects of BPAF and Safranal on some spermatological parameters, reproductive hormones, oxidant/antioxidant enzymes, and histopathological parameters were investigated. A total of 24 male New Zealand rabbits were divided into 4 groups (n= 6 for each group). The groups and the treatments they received by oral gavage for 9 weeks are as follows: The control group received 1 ml/day of corn oil, the BPAF group received 20 mg/kg/day of bisphenol AF, the Safranal group received 100 mg/kg/day safranal, and the treatment group received 20 mg/kg/day bisphenol AF and 100 mg/kg/day safranal. Although the spermatological parameters prior to the experiment revealed no differences among the groups, BPAF treatment reduced sperm quantity and motility, and elevated seminal plasma estrogen levels at the end of the study. BPAF treatments also had a negative impact on testicular MDA and GSH levels. It also caused seminiferous tubule degeneration in testicular tissue. On the other hand, the administration of safranal with BPAF decreased estrogen levels while increasing sperm concentration and motility to control group levels. Thus, the results suggested that safranal could have a beneficial effect in reducing BPAF-induced tissue damage. In conclusion, BPAF may have potentially harmful to the male reproductive system and safranal may exhibit a protective effect against BPAF exposure.
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Prajapati P, Kane S, McBrinn RC, Dean MS, Martins da Silva SJ, Brown SG. Elevated and Sustained Intracellular Calcium Signalling Is Necessary for Efficacious Induction of the Human Sperm Acrosome Reaction. Int J Mol Sci 2022; 23:ijms231911253. [PMID: 36232560 PMCID: PMC9570455 DOI: 10.3390/ijms231911253] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 09/13/2022] [Accepted: 09/16/2022] [Indexed: 11/16/2022] Open
Abstract
Progesterone and prostaglandin E1 are postulated to trigger the human sperm acrosome reaction (AR). However, their reported efficacy is very variable which likely, in part, reflects the plethora of experimental conditions and methodologies used to detect this physiologically relevant event. The purpose of this study was to develop an assay for the robust induction and objective measurement of the complete AR. Sperm from healthy volunteers or patients undertaking IVF were treated with a variety of ligands (progesterone, prostaglandin E1 or NH4Cl, alone or in combinations). AR, motility and intracellular calcium measurements were measured using flow cytometry, computer-assisted sperm analysis (CASA) and fluorimetry, respectively. The AR was significantly increased by the simultaneous application of progesterone, prostaglandin E1 and NH4Cl, following an elevated and sustained intracellular calcium concentration. However, we observed notable inter- and intra-donor sample heterogeneity of the AR induction. When studying the patient samples, we found no relationship between the IVF fertilization rate and the AR. We conclude that progesterone and prostaglandin E1 alone do not significantly increase the percentage of live acrosome-reacted sperm. This assay has utility for drug discovery and sperm toxicology studies but is not predictive for IVF success.
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Affiliation(s)
- Priyanka Prajapati
- Reproductive Medicine Research Group, School of Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK
| | - Shruti Kane
- School of Applied Sciences, Abertay University, Dundee DD1 1HG, UK
| | | | - Morven S. Dean
- Reproductive Medicine Research Group, School of Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK
- Assisted Conception Unit, Ninewells Hospital, Dundee DD1 9SY, UK
| | - Sarah J. Martins da Silva
- Reproductive Medicine Research Group, School of Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK
- Assisted Conception Unit, Ninewells Hospital, Dundee DD1 9SY, UK
- Correspondence:
| | - Sean G. Brown
- School of Applied Sciences, Abertay University, Dundee DD1 1HG, UK
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16
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Shamhari A‘A, Abd Hamid Z, Budin SB, Shamsudin NJ, Taib IS. Bisphenol A and Its Analogues Deteriorate the Hormones Physiological Function of the Male Reproductive System: A Mini-Review. Biomedicines 2021; 9:1744. [PMID: 34829973 PMCID: PMC8615890 DOI: 10.3390/biomedicines9111744] [Citation(s) in RCA: 5] [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: 10/18/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 02/06/2023] Open
Abstract
BPA is identified as an endocrine-disrupting chemical that deteriorates the physiological function of the hormones of the male reproductive system. Bisphenol F (BPF), bisphenol S (BPS), and bisphenol AF (BPAF) are actively explored as substitutes for BPA and are known as BPA analogues in most manufacturing industries. These analogues may demonstrate the same adverse effects as BPA on the male reproductive system; however, toxicological data explaining the male reproductive hormones' physiological functions are still limited. Hence, this mini-review discusses the effects of BPA and its analogues on the physiological functions of hormones in the male reproductive system, focusing on the hypothalamus-pituitary-gonad (HPG) axis, steroidogenesis, and spermatogenesis outcomes. The BPA analogues mainly show a similar negative effect on the hormones' physiological functions, proven by alterations in the HPG axis and steroidogenesis via activation of the aromatase activity and reduction of spermatogenesis outcomes when compared to BPA in in vitro and in vivo studies. Human biomonitoring studies also provide significant adverse effects on the physiological functions of hormones in the male reproductive system. In conclusion, BPA and its analogues deteriorate the physiological functions of hormones in the male reproductive system as per in vitro, in vivo, and human biomonitoring studies.
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Affiliation(s)
- Asma’ ‘Afifah Shamhari
- Centre for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia; (A.‘A.S.); (Z.A.H.); (S.B.B.)
| | - Zariyantey Abd Hamid
- Centre for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia; (A.‘A.S.); (Z.A.H.); (S.B.B.)
| | - Siti Balkis Budin
- Centre for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia; (A.‘A.S.); (Z.A.H.); (S.B.B.)
| | - Nurul Jehan Shamsudin
- Centre for Toxicology and Health Risk Research, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia;
| | - Izatus Shima Taib
- Centre for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia; (A.‘A.S.); (Z.A.H.); (S.B.B.)
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17
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Carlson EJ, Georg GI, Hawkinson JE. Steroidal Antagonists of Progesterone- and Prostaglandin E 1-Induced Activation of the Cation Channel of Sperm. Mol Pharmacol 2021; 101:56-67. [PMID: 34718225 PMCID: PMC8969127 DOI: 10.1124/molpharm.121.000349] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 10/23/2021] [Indexed: 12/18/2022] Open
Abstract
The cation channel of sperm (CatSper) is the principal entry point for calcium in human spermatozoa and its proper function is essential for successful fertilization. As CatSper is potently activated by progesterone, we evaluated a range of steroids to define the structure-activity relationships for channel activation and found that CatSper is activated by a broad range of steroids with diverse structural modifications. By testing steroids that failed to elicit calcium influx as inhibitors of channel activation, we discovered that medroxyprogesterone acetate, levonorgestrel, and aldosterone inhibited calcium influx produced by progesterone, prostaglandin E1, and the fungal natural product l-sirenin, but these steroidal inhibitors failed to prevent calcium influx in response to elevated K+ and pH. In contrast to these steroid antagonists, we demonstrated for the first time that the T-type calcium channel blocker ML218 acts similarly to mibefradil, blocking CatSper channels activated by both ligands and alkalinization/depolarization. These T-type calcium channel blockers produced an insurmountable blockade of CatSper, whereas the three steroids produced antagonism that was surmountable by increasing concentrations of each activator, indicating that the steroids selectively antagonize ligand-induced activation of CatSper rather than blocking channel function. Both the channel blockers and the steroid antagonists markedly reduced hyperactivated motility of human sperm assessed by computer-aided sperm analysis, consistent with inhibition of CatSper activation. Unlike the channel blockers mibefradil and ML218, which reduced total and progressive motility, medroxyprogesterone acetate, levonorgestrel, and aldosterone had little effect on these motility parameters, indicating that these steroids are selective inhibitors of hyperactivated sperm motility. SIGNIFICANCE STATEMENT: The steroids medroxyprogesterone acetate, levonorgestrel, and aldosterone selectively antagonize progesterone- and prostaglandin E1-induced calcium influx through the CatSper cation channel in human sperm. In contrast to T-type calcium channel blockers that prevent all modes of CatSper activation, these steroid CatSper antagonists preferentially reduce hyperactivated sperm motility, which is required for fertilization. The discovery of competitive antagonists of ligand-induced CatSper activation provides starting points for future discovery of male contraceptive agents acting by this unique mechanism.
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Affiliation(s)
- Erick J Carlson
- Department of Medicinal Chemistry (E.J.C., G.I.G., J.E.H.) and Institute for Therapeutics Discovery and Development (G.I.G., J.E.H.), University of Minnesota, Minneapolis, Minnesota
| | - Gunda I Georg
- Department of Medicinal Chemistry (E.J.C., G.I.G., J.E.H.) and Institute for Therapeutics Discovery and Development (G.I.G., J.E.H.), University of Minnesota, Minneapolis, Minnesota
| | - Jon E Hawkinson
- Department of Medicinal Chemistry (E.J.C., G.I.G., J.E.H.) and Institute for Therapeutics Discovery and Development (G.I.G., J.E.H.), University of Minnesota, Minneapolis, Minnesota
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Burgos-Aceves MA, Abo-Al-Ela HG, Faggio C. Impact of phthalates and bisphenols plasticizers on haemocyte immune function of aquatic invertebrates: A review on physiological, biochemical, and genomic aspects. JOURNAL OF HAZARDOUS MATERIALS 2021; 419:126426. [PMID: 34166954 DOI: 10.1016/j.jhazmat.2021.126426] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/14/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
The invertebrate innate immunity is a crucial characteristic that represents a valuable basis for studying common biological responses to environmental pollutants. Cell defence mechanisms are key players in protecting the organism from infections and foreign materials. Many haemocyte-associated immunological parameters have been reported to be immunologically sensitive to aquatic toxins (natural or artificial). Environmental plastic pollution poses a global threat to ecosystems and human health due to plastic vast and extensive use as additives in various consumer products. In recent years, studies have been done to evaluate the effects of plasticizers on humans and the environment, and their transmission and presence in water, air, and indoor dust, and so forth. Hence, the development of biomarkers that evaluate biological responses to different pollutants are essential to obtain important information on plasticizers' sublethal effects. This review analyses the current advances in the adverse effects of plasticizers (as emerging contaminants), such as immunological response disruption. The review also shows a critical analysis of the effects of the most widely used plasticizers on haemocytes. The advantages of an integrative approach that uses chemical, genetic, and immunomarker assays to monitor toxicity are highlighted. All these factors are imperative to ponder when designing toxicity studies to recognize the potential effects of plasticizers like bisphenol A and phthalates.
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Affiliation(s)
- Mario Alberto Burgos-Aceves
- Department of Chemistry and Biology, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy
| | - Haitham G Abo-Al-Ela
- Genetics and Biotechnology, Department of Aquaculture, Faculty of Fish Resources, Suez University, Suez 43518, Egypt
| | - Caterina Faggio
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres, 31, 98166 Messina, Italy.
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19
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Wang D, Zhao H, Fei X, Synder SA, Fang M, Liu M. A comprehensive review on the analytical method, occurrence, transformation and toxicity of a reactive pollutant: BADGE. ENVIRONMENT INTERNATIONAL 2021; 155:106701. [PMID: 34146765 DOI: 10.1016/j.envint.2021.106701] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 05/27/2021] [Accepted: 06/05/2021] [Indexed: 06/12/2023]
Abstract
Bisphenol A diglycidyl ether (BADGE)-based epoxy resin is one of the most widely used epoxy resins with an annual production amount of several million tons. Compared with all other legacy or emerging organic compounds, BADGE is special due to its toxicity and high reactivity in the environment. More and more studies are available on its analytical methods, occurrence, transformation and toxicity. Here, we provided a comprehensive review of the current BADGE-related studies, with focus on its production, application, available analytical methods, occurrences in the environment and human specimen, abiotic and biotic transformation, as well as the in vitro and in vivo toxicities. The available data show that BADGE and its derivatives are ubiquitous environmental chemicals and often well detected in human specimens. For their analysis, a water-free sample pretreatment should be considered to avoid hydrolysis. Additionally, their complex reactions with endogenous metabolites are areas of great interest. To date, the monitoring and further understanding of their transport and fate in the environment are still quite lacking, comparing with its analogues bisphenol A (BPA) and bisphenol S (BPS). In terms of toxicity, the summary of its current studies and Environmental Protection Agency (EPA) ToxCast toxicity database suggests BADGE might be an endocrine disruptor, though more detailed evidence is still needed to confirm this hypothesis in in vivo animal models. Future study of BADGE should focus on its metabolic transformation, reaction with protein and validation of its role as an endocrine disruptor. We believe that the elucidation of BADGEs can greatly enhance our understandings of those reactive compounds in the environment and human.
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Affiliation(s)
- Dongqi Wang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, Shaanxi 710048, China
| | - Haoduo Zhao
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Xunchang Fei
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Shane Allen Synder
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Mingliang Fang
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore.
| | - Min Liu
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore; Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore.
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20
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Rehfeld A. Revisiting the action of steroids and triterpenoids on the human sperm Ca2+ channel CatSper. Mol Hum Reprod 2021; 26:816-824. [PMID: 32926144 DOI: 10.1093/molehr/gaaa062] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/15/2020] [Indexed: 02/07/2023] Open
Abstract
The sperm-specific Ca2+ channel CatSper (cation channel of sperm) is vital for male fertility. Contradictory findings have been published on the regulation of human CatSper by the endogenous steroids estradiol, testosterone and hydrocortisone, as well as the plant triterpenoids, lupeol and pristimerin. The aim of this study was to elucidate this controversy by investigating the action of these steroids and plant triterpenoids on human CatSper using population-based Ca2+-fluorimetric measurements, the specific CatSper-inhibitor RU1968 and a functional test assessing the CatSper-dependent penetration of human sperm cells into methylcellulose. Estradiol, testosterone and hydrocortisone were found to induce Ca2+-signals in human sperm cells with EC50 values in the lower μM range. By employing the specific CatSper-inhibitor RU1968, all three steroids were shown to induce Ca2+-signals through an action on CatSper, similar to progesterone. The steroids were found to dose-dependently inhibit subsequent progesterone-induced Ca2+-signals with IC50 values in the lower μM range. Additionally, the three steroids were found to significantly increase the penetration of human sperm cells into methylcellulose, similar to the effect of progesterone. The two plant triterpenoids, lupeol and pristimerin, were unable to inhibit progesterone-induced Ca2+-signals, whereas the CatSper-inhibitor RU1968 strongly inhibited progesterone-induced Ca2+-signals. In conclusion, this study supports the claim that the steroids estradiol, testosterone and hydrocortisone act agonistically on CatSper in human sperm cells, thereby mimicking the effect of progesterone, and that lupeol and pristimerin do not act as inhibitors of human CatSper.
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Affiliation(s)
- Anders Rehfeld
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
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21
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Zhou Y, Xu W, Yuan Y, Luo T. What is the Impact of Bisphenol A on Sperm Function and Related Signaling Pathways: A Mini-review? Curr Pharm Des 2021; 26:4822-4828. [PMID: 32954995 DOI: 10.2174/1381612826666200821113126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 08/06/2020] [Indexed: 02/06/2023]
Abstract
Bisphenol A (BPA) is an organic synthetic compound that is ubiquitously present in daily life. It is a typical environmental endocrine disruptor that affects the functions of endogenous hormones. There is a significant negative correlation between BPA and male reproduction. This mini-review describes current research data on the negative effects of BPA on sperm functions in humans and animal models, as well as on its supposed mechanisms of action, such as CATSPER-Ca2+ signaling, cAMP-protein kinase A signaling, and epigenetic changes. The published evidence showed an adverse impact of BPA on sperm tail morphology, counts, motility, and acrosome reaction action. Sperm function related signaling pathways, such as CATSPER-Ca2+ signaling, cAMP-protein kinase A signaling, and phosphorylation signaling, as well as epigenetic changes and sperm aging, are associated with BPA exposure in human and animal models. The clear risks of BPA exposure can provide greater awareness of the potential threat of environmental contaminants on male fertility.
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Affiliation(s)
- Yian Zhou
- Institute of Life Science and School of Life Science, Nanchang University, No. 999, Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China.,Nanchang University Queen Mary School, Jiangxi Medical College of Nanchang University, 999 Xuefu
Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Wenqing Xu
- Institute of Life Science and School of Life Science, Nanchang University, No. 999, Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Yuan Yuan
- Institute of Life Science and School of Life Science, Nanchang University, No. 999, Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, No. 999, Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China.,Nanchang University Queen Mary School, Jiangxi Medical College of Nanchang University, 999 Xuefu
Road, Honggutan New District, Nanchang, Jiangxi 330031, China
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22
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Nevoral J, Havránková J, Kolinko Y, Prokešová Š, Fenclová T, Monsef L, Žalmanová T, Petr J, Králíčková M. Exposure to alternative bisphenols BPS and BPF through breast milk: Noxious heritage effect during nursing associated with idiopathic infertility. Toxicol Appl Pharmacol 2021; 413:115409. [PMID: 33476676 DOI: 10.1016/j.taap.2021.115409] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 02/08/2023]
Abstract
There is increasing evidence that bisphenols BPS and BPF, which are analogues of BPA, have deleterious effects on reproduction even at extremely low doses. Indirect exposure via the maternal route (i.e. across the placenta and/or by breastfeeding) is underestimated, although it can be assumed to be a cause of idiopathic female infertility. Therefore, we hypothesised the deleterious effects of exposure to BPA analogues during breastfeeding on the ovarian and oocyte quality of offspring. A 15-day exposure period of pups was designed, whilst nursing dams (N ≥ 6 per experimental group) were treated via drinking water with a low (0.2 ng/g body weight/day) or moderate (20 ng/g body weight/day) dose of bisphenol, mimicking real exposure in humans. Thereafter, female pups were bred to 60 days and oocytes were collected. Immature oocytes were used in the in-vitro maturation assay; alternatively, in-vivo-matured oocytes were isolated and used for parthenogenetic activation. Both in-vitro- and in-vivo-matured oocytes were subjected to immunostaining of spindle microtubules (α-tubulin) and demethylation of histone H3 on the lysine K27 (H3K27me2) residue. Although very low doses of both BPS and BPF did not affect the quality of ovarian histology, spindle formation and epigenetic signs were affected. Notably, in-vitro-matured oocytes were significantly sensitive to both doses of BPS and BPF. Although no significant differences in spindle-chromatin quality were identified in ovulated and in-vivo-matured oocytes, developmental competence was significantly damaged. Taken together, our mouse model provides evidence that bisphenol analogues represent a risk to human reproduction, possibly leading to idiopathic infertility in women.
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Affiliation(s)
- Jan Nevoral
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic; Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic.
| | - Jiřina Havránková
- Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Yaroslav Kolinko
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic; Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Šárka Prokešová
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic; Institute of Animal Science, Prague 10-Uhrineves, Czech Republic
| | - Tereza Fenclová
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Ladan Monsef
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Tereza Žalmanová
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic; Institute of Animal Science, Prague 10-Uhrineves, Czech Republic
| | - Jaroslav Petr
- Institute of Animal Science, Prague 10-Uhrineves, Czech Republic
| | - Milena Králíčková
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic; Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
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23
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Evaluation of a panel of spermatological methods for assessing reprotoxic compounds in multilayer semen plastic bags. Sci Rep 2020; 10:22258. [PMID: 33335274 PMCID: PMC7746751 DOI: 10.1038/s41598-020-79415-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 12/04/2020] [Indexed: 12/18/2022] Open
Abstract
The increase of fertility performance in sows is one of the biggest achievements in pig production over the last 30 years. Nevertheless, pig farms using artificial insemination (AI) repeatedly experienced in recent year’s fertility problems with dramatic consequences due to toxic compounds from plastic semen bags. In particular, bisphenol A diglycidyl-ether (BADGE) present in multilayer plastic bags can leach into the semen and could affect the functionality of the spermatozoa. Former studies could not find any alterations in spermatozoa based on the exposure to BADGE. The aim of the study was to evaluate effects of BADGE on boar spermatozoa using an extended panel of spermatological methods. In spring 2019, a large drop in farrowing rates from 92.6 ± 2.3% to 63.7 ± 11.1% in four sow farms in Croatia was detected. In migration studies, BADGE could be identified as a causal toxic compound and leached into the extended semen in concentration of 0.37 ± 0.05 mg/L. Detailed spermatological studies showed that significant predictors for effects on spermatozoa were different levels of motility and kinematic data after a prolonged storage time, thermo-resistance test (prolonged incubation time), mitochondrial activity, membrane integrity and fluidity. No serious effects were observed for sperm morphology and DNA fragmentation. These results provide new insights into the development of a new quality assurance concept for a detailed spermatological examination during testing of plastic materials for boar semen preservation. It could be shown that boar spermatozoa are an excellent biosensor to detect potential toxicity and fertility-relevant compounds.
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Rehfeld A, Mendoza N, Ausejo R, Skakkebæk NE. Bisphenol A Diglycidyl Ether (BADGE) and Progesterone Do Not Induce Ca 2+ Signals in Boar Sperm Cells. Front Physiol 2020; 11:785. [PMID: 32774306 PMCID: PMC7381341 DOI: 10.3389/fphys.2020.00785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 06/15/2020] [Indexed: 12/22/2022] Open
Abstract
Aim Exposure of boar sperm cells to Bisphenol A diglycidyl ether (BADGE) has been shown to lead to reproductive failure in sows, however, the mode of action is unknown. As we have recently shown that BADGE can interfere with Ca2 + signaling in human sperm cells through an action on CatSper, and as CatSper has been shown to be expressed in boar sperm cells, we hypothesized that a similar mechanism in the boar sperm cells could be responsible for the reproductive failure. Methods Direct effects of BADGE and the endogenous ligand of human CatSper, progesterone, on Ca2+ signaling in human and boar sperm cells were evaluated side-by-side using a Ca2+ fluorimetric assay measuring changes in intracellular Ca2+. Effects of BADGE on Ca2+ signaling in boar sperm were furthermore assessed by flow cytometry by an independent laboratory. Results The exact same solutions of BADGE and progesterone induced transient biphasic Ca2+ signals in human sperm cells, but failed to do so in both non-capacitated and capacitated boar sperm cells. BADGE also failed to induce transient biphasic Ca2+ signals in boar sperm cells in the flow cytometric assay. Conclusion BADGE and progesterone failed to induce Ca2+ signals in boar sperm cells. This indicates that the signaling mechanisms leading to activation of CatSper differs between human and boar sperm cells, and suggests that the mode of action by which exposure of boar sperm cells to BADGE can lead to reproductive failure in sows does not involve effects on Ca2+ signaling.
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Affiliation(s)
- Anders Rehfeld
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Noelia Mendoza
- Department of Research and Development, Magapor SL, Zaragoza, Spain
| | - Raquel Ausejo
- Department of Research and Development, Magapor SL, Zaragoza, Spain
| | - Niels Erik Skakkebæk
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
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