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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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Liang M, Ji N, Song J, Kang H, Zeng X. Flagellar pH homeostasis mediated by Na+/H+ exchangers regulates human sperm functions through coupling with CatSper and KSper activation. Hum Reprod 2024; 39:674-688. [PMID: 38366201 DOI: 10.1093/humrep/deae020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 01/19/2024] [Indexed: 02/18/2024] Open
Abstract
STUDY QUESTION Whether and how do Na+/H+ exchangers (NHEs) regulate the physiological functions of human sperm? SUMMARY ANSWER NHE-mediated flagellar intracellular pH (pHi) homeostasis facilitates the activation of the pH-sensitive, sperm-specific Ca2+ channel (CatSper) and the sperm-specific K+ channel (KSper), which subsequently modulate sperm motility, hyperactivation, flagellar tyrosine phosphorylation, and the progesterone (P4)-induced acrosome reaction. WHAT IS KNOWN ALREADY Sperm pHi alkalization is an essential prerequisite for the acquisition of sperm-fertilizing capacity. Different sperm functions are strictly controlled by particular pHi regulatory mechanisms. NHEs are suggested to modulate sperm H+ efflux. STUDY DESIGN, SIZE, DURATION This was a laboratory study that used samples from >50 sperm donors over a period of 1 year. To evaluate NHE action on human sperm function, 5-(N,N-dimethyl)-amiloride (DMA), a highly selective inhibitor of NHEs, was utilized. All experiments were repeated at least five times using different individual sperm samples or cells. PARTICIPANTS/MATERIALS, SETTING, METHODS By utilizing the pH fluorescent indicator pHrodo Red-AM, we detected alterations in single-cell pHi value in human sperm. The currents of CatSper and KSper in human sperm were recorded by the whole-cell patch-clamp technique. Changes in population and single-cell Ca2+ concentrations ([Ca2+]i) of human sperm loaded with Fluo 4-AM were measured. Membrane potential (Vm) and population pHi were quantitatively examined by a multimode plate reader after sperm were loaded with 3,3'-dipropylthiadicarbocyanine iodide and 2',7'-bis-(2-carboxyethyl)-5-(and-6)-carboxyfluorescein, acetoxymethyl ester, respectively. Sperm motility parameters were assessed by a computer-assisted semen analysis system. Tyrosine phosphorylation was determined by immunofluorescence, and sperm acrosome reaction was evaluated by Pisum sativum agglutinin-FITC staining. MAIN RESULTS AND THE ROLE OF CHANCE DMA-induced NHEs inhibition severely acidified the human sperm flagellar pHi from 7.20 ± 0.04 to 6.38 ± 0.12 (mean ± SEM), while the effect of DMA on acrosomal pHi was less obvious (from 5.90 ± 0.13 to 5.57 ± 0.12, mean ± SEM). The whole-cell patch-clamp recordings revealed that NHE inhibition remarkably suppressed alkalization-induced activation of CatSper and KSper. As a consequence, impairment of [Ca2+]i homeostasis and Vm maintenance were detected in the presence of DMA. During the capacitation process, pre-treatment with DMA for 2 h potently decreased sperm pHi, which in turn decreased sperm motility and kinetic parameters. Sperm capacitation-associated functions, including hyperactivation, tyrosine phosphorylation, and P4-induced acrosome reaction, were also compromised by NHE inhibition. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION This was an in vitro study. Caution should be taken when extrapolating these results to in vivo applications. WIDER IMPLICATIONS OF THE FINDINGS This study revealed that NHEs are important physiological regulators for human CatSper and KSper, which are indispensable for human sperm fertility, suggesting that malfunction of NHEs could be an underlying mechanism for the pathogenesis of male infertility. FUNDING/COMPETING INTEREST(S) This work was supported by the National Natural Science Foundation of China (32271167 and 81871202 to X.Z.), Jiangsu Innovation and Entrepreneurship Talent Plan (JSSCRC20211543 to X.Z.), the Social Development Project of Jiangsu Province (No. BE2022765 to X.Z.), the Society and livelihood Project of Nantong City (No. MS22022087 to X.Z.), and the Natural Science Foundation of Jiangsu Province (BK20220608 to H.K.). The authors have no competing interests to declare.
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Affiliation(s)
- Min Liang
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong, China
| | - Nanxi Ji
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong, China
| | - Jian Song
- Department of Obstetrics and Gynecology, Center of Reproductive Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Hang Kang
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong, China
| | - Xuhui Zeng
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong, China
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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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Yang L, Mei G, Yang Y, Cui J, Peng S, Peng Z, Cheng Y. Hexachlorocyclohexane impairs human sperm motility by affecting lysine glutarylation and mitochondrial functions. Food Chem Toxicol 2023; 179:113991. [PMID: 37595880 DOI: 10.1016/j.fct.2023.113991] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/06/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
Decreased sperm motility is a leading cause of male infertility and persistent organic pollutants are known to contribute significantly to the development of this disease. The effects of organochlorine pesticides such as hexachlorocyclohexane (HCH) on human sperm function and their mechanisms of action have received much attention, but are still not fully understood. Herein, we discovered that HCH has a concentration- and time-dependent inhibitory effect on human sperm motility in vitro. Moreover, HCH could reduce the levels of lysine glutarylation (Kglu) and glucose-6-phosphate dehydrogenase activity in sperm. Meanwhile, HCH could increase reactive oxygen species and thereby lead to mitochondrial depolarization and the down-regulation of adenosine triphosphate levels. In particular, we observed that sodium glutarate (Na-glu), the precursor of glutaryl-CoA, could alleviate the inhibitory effect of HCH on sperm Kglu levels, whereas the ROS scavenger N-acetyl-L-cysteine (NAC) had no effect. Intriguingly, both Na-glu and NAC were able to partially inhibit the HCH-induced increase in sperm ROS levels and impaired sperm motility. In conclusion, we propose that HCH inhibits sperm Kglu, leading to the disruption of mitochondrial energy metabolism, which in turn adversely affects sperm motility.
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Affiliation(s)
- Liu Yang
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, Yichun University, Yichun, China
| | - Guangquan Mei
- Jiangxi Provincial Key Laboratory of Natural Active Pharmaceutical Constituents, Department of Chemistry and Bioengineering, Yichun University, Yichun, China; Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, Yichun University, Yichun, China
| | - Yebin Yang
- College of Chemistry and Biological Engineering, Yichun University, Yichun, China
| | - Jiajun Cui
- Center for Translational Medicine, Department of Medicine, Yichun University, Yichun, China
| | - Shenglin Peng
- Yichun People's Hospital, Jiangxi Province, Yichun, China
| | - Zhen Peng
- Yichun People's Hospital, Jiangxi Province, Yichun, China
| | - Yimin Cheng
- Jiangxi Provincial Key Laboratory of Natural Active Pharmaceutical Constituents, Department of Chemistry and Bioengineering, Yichun University, Yichun, China; Institute of Molecular Rhythm and Metabolism, Guangzhou University of Chinese Medicine, Guangzhou, China; Center for Translational Medicine, Department of Medicine, Yichun University, Yichun, China.
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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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Han P, Wang X, Zhou T, Cheng J, Wang C, Sun F, Zhao X. Inhibition of ferroptosis attenuates oligospermia in male Nrf2 knockout mice. Free Radic Biol Med 2022; 193:421-429. [PMID: 36309297 DOI: 10.1016/j.freeradbiomed.2022.10.314] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 10/11/2022] [Accepted: 10/23/2022] [Indexed: 11/06/2022]
Abstract
Nuclear factor-E2-related factor 2 (Nrf2) expression in sperm decreases in some oligospermia patients. However, the mechanism of reduced Nrf2 expression in sperm of oligospermia men is not elucidated. In the present study, our clinical trial results showed that Nrf2 and glutathione peroxidase 4 (GPX4) protein expressions in sperm of oligospermia men significantly decreased than those of healthy men. In animal experiments, mice were randomly divided into 3 groups: wild type (WT), Nrf2 knockout (Nrf2-/-) and Nrf2-/- + ferroptosis inhibitor (Fer-1) groups. Fer-1 was intraperitoneally injected in Nrf2-/- mice for 4 weeks. The results showed that male Nrf2-/- mice displayed decreased sperm concentration and motility, and significantly lower fertility. Compared with WT mice, malondialdehyde (MDA) content and prostaglandin-endoperoxide synthase 2 (Ptgs2) mRNA expression increased, but nicotinamide adenine dinucleotide phosphate oxidase (NADPH) content decreased in the testes of Nrf2-/- mice, which were biomarkers of ferroptosis. Furthermore, treatment with Fer-1 in Nrf2-/- mice reversed the decreased sperm concentration and motility. Meanwhile, histology showed that spermatogenic cells obviously decreased, and vacuolization formed in the testes of Nrf2-/- mice, which were reversed by Fer-1 treatment. Additionally, compared with WT mice, GPX4, solute carrier family 7 member 11 (SLC7A11), glutamate-cysteine ligase, catalytic subunit (Gclc), glutamate-cysteine ligase, modifier subunit (Gclm) and ferroportin 1 (FPN1) mRNA and protein expressions significantly decreased, but transferrin receptor 1 (TfR1) and divalent metal transporter 1 (DMT1) mRNA and protein expressions increased in testicular tissues in Nrf2-/- mice. After treatment with Fer-1, only Gclc and Gclm mRNA and protein expressions increased. Taken together, our data suggested that deletion of Nrf2 leads to downregulation of GPX4 and regulation of other ferroptosis-related genes, resulting in ferroptosis occurrence in spermatogenic cells and ultimately oligospermia.
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Affiliation(s)
- Ping Han
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Xia Wang
- Center for Reproductive Medicine, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Tianqiu Zhou
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Jinmei Cheng
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Chengniu Wang
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Fei Sun
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong, 226001, Jiangsu Province, China.
| | - Xi Zhao
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong, 226001, Jiangsu Province, China
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Cordero-Martínez J, Jimenez-Gutierrez GE, Aguirre-Alvarado C, Alacántara-Farfán V, Chamorro-Cevallos G, Roa-Espitia AL, Hernández-González EO, Rodríguez-Páez L. Participation of signaling proteins in sperm hyperactivation. Syst Biol Reprod Med 2022; 68:315-330. [DOI: 10.1080/19396368.2022.2122761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Joaquín Cordero-Martínez
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | | | - Charmina Aguirre-Alvarado
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
- Unidad de Investigación Médica en Inmunología e Infectología Centro Médico Nacional La Raza, IMSS, Ciudad de México, Mexico
| | - Verónica Alacántara-Farfán
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Germán Chamorro-Cevallos
- Laboratorio de Toxicología Preclínica Departamento de Farmacia Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Ana L. Roa-Espitia
- Departamento de Biología Celular Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Instituto Politécnico Nacional, México City, Mexico
| | - Enrique O. Hernández-González
- Departamento de Biología Celular Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Instituto Politécnico Nacional, México City, Mexico
| | - Lorena Rodríguez-Páez
- Laboratorio de Bioquímica Farmacológica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
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Birch MR, Johansen M, Skakkebæk NE, Andersson AM, Rehfeld A. In vitro investigation of endocrine disrupting effects of pesticides on Ca 2+-signaling in human sperm cells through actions on the sperm-specific and steroid-activated CatSper Ca 2+-channel. ENVIRONMENT INTERNATIONAL 2022; 167:107399. [PMID: 35853389 DOI: 10.1016/j.envint.2022.107399] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 06/30/2022] [Accepted: 07/05/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Ca2+-signaling controls sperm cell functions necessary for successful fertilization. Multiple endocrine disrupting chemicals have been found to interfere with normal Ca2+-signaling in human sperm cells through an activation of the sperm-specific CatSper Ca2+-channel, which is vital for normal male fertility. OBJECTIVES We investigated 53 pesticides for their ability to interfere with CatSper mediated Ca2+-signaling and function in human sperm cells. METHODS Effects of the pesticides on Ca2+-signaling in human sperm cells were evaluated using a Ca2+-fluorometric assay. Effects via CatSper were assessed using the specific CatSper inhibitor RU1968. Effects on human sperm function and viability were assessed using an image cytometry-based acrosome reaction assay and the modified Kremer's sperm-mucus penetration assay. RESULTS 28 of 53 pesticides were found to induce Ca2+-signals in human sperm cells at 10 µM. The majority of these 28 active pesticides induced Ca2+-signals through CatSper and interfered with subsequent Ca2+-signals induced by the two endogenous CatSper ligands progesterone and prostaglandin E1. Multiple active pesticides were found to affect Ca2+-mediated sperm functions and viability at 10 µM. Low nM dose mixtures of the active pesticides alone or in combination with other environmental chemicals were found to significantly induce Ca2+-signals and inhibit Ca2+-signals induced subsequently by progesterone and prostaglandin E1. CONCLUSIONS Our results show that pesticides, both alone and in low nM dose mixtures, interfere with normal Ca2+-signaling in human sperm cells in vitro in low nM concentrations. Biomonitoring of the active pesticides in relevant matrices such as blood and reproductive fluids is very limited and the effects of real time human pesticide exposure on human sperm cells and fertility thus remains largely unknown. To which extent human pesticide exposure affects the chances of a successful fertilization in humans in vivo needs further research.
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Affiliation(s)
- Michala R Birch
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Denmark
| | - Mathias Johansen
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Denmark
| | - Niels E Skakkebæk
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Denmark
| | - Anna-Maria Andersson
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Denmark
| | - Anders Rehfeld
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Denmark.
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Xiang J, Kang H, Li HG, Shi YL, Zhang YL, Ruan CL, Liu LH, Gao HQ, Luo T, Hu GS, Zhu WL, Jia JM, Chen JC, Fang JB. Competitive CatSper Activators of Progesterone from Rhynchosia volubilis. PLANTA MEDICA 2022; 88:881-890. [PMID: 34359084 PMCID: PMC9439852 DOI: 10.1055/a-1542-0151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
The root Rhynchosia volubilis was widely used for contraception in folk medicine, although its molecular mechanism on antifertility has not yet been revealed. In human sperm, it was reported that the cation channel of sperm, an indispensable cation channel for the fertilization process, could be regulated by various steroid-like compounds in plants. Interestingly, these nonphysiological ligands would also disturb the activation of the cation channel of sperm induced by progesterone. Therefore, this study aimed to explore whether the compounds in R. volubilis affect the physiological regulation of the cation channel of sperm. The bioguided isolation of the whole herb of R. volubilis has resulted in the novel discovery of five new prenylated isoflavonoids, rhynchones A - E (1: - 5: ), a new natural product, 5'-O-methylphaseolinisoflavan (6: ) (1H and 13C NMR data, Supporting Information), together with twelve known compounds (7: - 18: ). Their structures were established by extensive spectroscopic analyses and drawing a comparison with literature data, while their absolute configurations were determined by electronic circular dichroism calculations. The experiments of intracellular Ca2+ signals and patch clamping recordings showed that rhynchone A (1: ) significantly reduced cation channel of sperm activation by competing with progesterone. In conclusion, our findings indicat that rhynchone A might act as a contraceptive compound by impairing the activation of the cation channel of sperm and thus prevent fertilization.
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Affiliation(s)
- Jin Xiang
- School of Pharmacy, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hang Kang
- Institute of Life Science and School of Life Science, Nanchang University, Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, China
| | - Hong-Gang Li
- Institute of Reproductive Health/Center of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu-Long Shi
- CAS Key Laboratory of Receptor Research & Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- School of Pharmacy, University of Chinese Academy of Sciences, Beijing, China
| | - Ya-Li Zhang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China
| | - Chang-Lei Ruan
- School of Pharmacy, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lin-Hui Liu
- School of Pharmacy, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Han-Qi Gao
- School of Pharmacy, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, China
| | - Gao-Sheng Hu
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China
| | - Wei-Liang Zhu
- CAS Key Laboratory of Receptor Research & Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- School of Pharmacy, University of Chinese Academy of Sciences, Beijing, China
| | - Jing-Ming Jia
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China
| | - Jia-Chun Chen
- School of Pharmacy, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jin-Bo Fang
- School of Pharmacy, Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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10
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Chen C, Li B, Huang R, Dong S, Zhou Y, Song J, Zeng X, Zhang X. Involvement of Ca 2+ and ROS signals in nickel-impaired human sperm function. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 231:113181. [PMID: 35026585 DOI: 10.1016/j.ecoenv.2022.113181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 01/05/2022] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
As one of the main environmental pollutants and occupational hazards, nickel has been reported to have mutagenic, carcinogenic, and teratogenic properties, as well as reproductive toxicity. However, how nickel affects human reproduction is still unclear. In this study, the toxicity of nickel on human sperm and the underlying mechanisms were evaluated in vitro. We found that NiCl2 (10, 50, and 250 μM) impaired sperm total motility and progressive motility in a dose- and time-dependent manner. In addition, sperm hyperactivation and the ability of human sperm to penetrate a viscous medium were found to be compromised after nickel exposure. Mechanically, NiCl2 significantly inhibited the basal intracellular Ca2+ signaling. Besides, reactive oxygen species (ROS), superoxide, and malondialdehyde levels were increased in human sperm after exposure to different concentrations of NiCl2. Consistently, eliminating excess ROS by N-acetyl-L-cysteine or tocopherol significantly alleviated nickel-impaired sperm motility. Taken together, these results revealed that nickel could compromise sperm functions by interfering with Ca2+ signaling and inducing excessive oxidative stress. These findings suggest that, in the high and occupational nickel exposure environments, the contribution of nickel toxicity to the males who wish to preserve their fertility is worthy of careful evaluation.
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Affiliation(s)
- Chen Chen
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong 226019, PR China
| | - Bingqian Li
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong 226019, PR China
| | - Rongzu Huang
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong 226019, PR China
| | - Shijue Dong
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong 226019, PR China
| | - Yang Zhou
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong 226019, PR China
| | - Jian Song
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong 226019, PR China
| | - Xuhui Zeng
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong 226019, PR China.
| | - Xiaoning Zhang
- Institute of Reproductive Medicine, Medical School, Nantong University, Nantong 226019, PR China.
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11
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Ješeta M, Navrátilová J, Franzová K, Fialková S, Kempisty B, Ventruba P, Žáková J, Crha I. Overview of the Mechanisms of Action of Selected Bisphenols and Perfluoroalkyl Chemicals on the Male Reproductive Axes. Front Genet 2021; 12:692897. [PMID: 34646297 PMCID: PMC8502804 DOI: 10.3389/fgene.2021.692897] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 09/13/2021] [Indexed: 12/17/2022] Open
Abstract
Male fertility has been deteriorating worldwide for considerable time, with the greatest deterioration recorded mainly in the United States, Europe countries, and Australia. That is, especially in countries where an abundance of chemicals called endocrine disruptors has repeatedly been reported, both in the environment and in human matrices. Human exposure to persistent and non-persistent chemicals is ubiquitous and associated with endocrine-disrupting effects. This group of endocrine disrupting chemicals (EDC) can act as agonists or antagonists of hormone receptors and can thus significantly affect a number of physiological processes. It can even negatively affect human reproduction with an impact on the development of gonads and gametogenesis, fertilization, and the subsequent development of embryos. The negative effects of endocrine disruptors on sperm gametogenesis and male fertility in general have been investigated and repeatedly demonstrated in experimental and epidemiological studies. Male reproduction is affected by endocrine disruptors via their effect on testicular development, impact on estrogen and androgen receptors, potential epigenetic effect, production of reactive oxygen species or direct effect on spermatozoa and other cells of testicular tissue. Emerging scientific evidence suggests that the increasing incidence of male infertility is associated with the exposure to persistent and non-persistent endocrine-disrupting chemicals such as bisphenols and perfluoroalkyl chemicals (PFAS). These chemicals may impact men’s fertility through various mechanisms. This study provides an overview of the mechanisms of action common to persistent (PFAS) and nonpersistent (bisphenols) EDC on male fertility.
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Affiliation(s)
- Michal Ješeta
- Department of Obstetrics and Gynecology, Faculty of Medicine Masaryk University and University Hospital Brno, Brno, Czechia.,Department of Veterinary Sciences, Czech University of Life Sciences Prague, Prague, Czechia
| | - Jana Navrátilová
- RECETOX Centre, Faculty of Science, Masaryk University, Brno, Czechia
| | - Kateřina Franzová
- Department of Obstetrics and Gynecology, Faculty of Medicine Masaryk University and University Hospital Brno, Brno, Czechia
| | - Sandra Fialková
- RECETOX Centre, Faculty of Science, Masaryk University, Brno, Czechia
| | - Bartozs Kempisty
- Department of Histology and Embryology, Poznan University of Medical Sciences, Poznan, Poland.,Department of Anatomy, Poznan University of Medical Sciences, Poznan, Poland.,Department of Veterinary Medicine, Nicolaus Copernicus University, Torun, Poland.,Prestage Department of Poultry Science, College of Agriculture and Life Sciences, North Carolina State University, Raleigh, NC, United States
| | - Pavel Ventruba
- Department of Obstetrics and Gynecology, Faculty of Medicine Masaryk University and University Hospital Brno, Brno, Czechia
| | - Jana Žáková
- Department of Obstetrics and Gynecology, Faculty of Medicine Masaryk University and University Hospital Brno, Brno, Czechia
| | - Igor Crha
- Department of Obstetrics and Gynecology, Faculty of Medicine Masaryk University and University Hospital Brno, Brno, Czechia.,Department of Nursing and Midwifery, Faculty of Medicine, Masaryk University, Brno, Czechia
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12
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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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13
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Li X, Wu S, Yu K, Hou J, Jiang C, Li K, Chu Z, Jiang X, Yu X, Xu W. A dual-site controlled pH probe revealing the pH of sperm cytoplasm and screening for healthy spermatozoa. J Mater Chem B 2021; 9:3662-3665. [PMID: 33870986 DOI: 10.1039/d1tb00108f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A dual-site controlled pH probe, which is composed of gold nanoparticles and modified with rhodamine and fluorescein derivatives, was applied to sensitively monitor intracellular pH changes in sperm. The pH probe revealed the intracellular pH of sperm under different conditions and demonstrated the lower pH in asthenozoospermia patients as compared to healthy individuals. Importantly, the pH probe can help screen for healthy sperm.
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Affiliation(s)
- Xiaoliang Li
- Department of Obstetrics/Gynecology, Joint Laboratory of Reproductive Medicine, SCU-CUHK, Key Laboratory of Obstetric, Gynaecologic and Paediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.
| | - Sixian Wu
- Department of Obstetrics/Gynecology, Joint Laboratory of Reproductive Medicine, SCU-CUHK, Key Laboratory of Obstetric, Gynaecologic and Paediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.
| | - Kangkang Yu
- Key Laboratory of Bio-Resources and Eco-Environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu, 610064, China
| | - Jianwen Hou
- Department of Obstetrics/Gynecology, Joint Laboratory of Reproductive Medicine, SCU-CUHK, Key Laboratory of Obstetric, Gynaecologic and Paediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.
| | - Chuan Jiang
- Department of Obstetrics/Gynecology, Joint Laboratory of Reproductive Medicine, SCU-CUHK, Key Laboratory of Obstetric, Gynaecologic and Paediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.
| | - Kun Li
- Key Laboratory of Green Chemistry and Technology (Ministry of Education), College of Chemistry, Sichuan University, Chengdu, 610064, China.
| | - Zhiwen Chu
- West China School of Pharmacy, Sichuan University, Chengdu, 610064, China
| | - Xiaohui Jiang
- Human Sperm Bank, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Xiaoqi Yu
- Key Laboratory of Green Chemistry and Technology (Ministry of Education), College of Chemistry, Sichuan University, Chengdu, 610064, China.
| | - Wenming Xu
- Department of Obstetrics/Gynecology, Joint Laboratory of Reproductive Medicine, SCU-CUHK, Key Laboratory of Obstetric, Gynaecologic and Paediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China. and Reproductive Endocrinology and Regulation Laboratory, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
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14
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Chen H, Tang L, Hong Q, Pan T, Weng S, Sun J, Wu Q, Zeng X, Tang Y, Luo T. Testis developmental related gene 1 (TDRG1) encodes a progressive motility-associated protein in human spermatozoa. Hum Reprod 2021; 36:283-292. [PMID: 33279973 DOI: 10.1093/humrep/deaa297] [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: 02/26/2020] [Revised: 09/30/2020] [Indexed: 11/15/2022] Open
Abstract
STUDY QUESTION Is there an association between the human testis-specific gene, testis developmental related gene 1 (TDRG1) and human sperm motility? SUMMARY ANSWER TDRG1 is associated with asthenozoospermia and involved in regulating human sperm motility. WHAT IS KNOWN ALREADY Many testis-specific proteins potentially regulate spermatogenesis and sperm motility. We have identified a novel human testis-specific gene, TDRG1, which encodes a 100-amino-acid protein localized in the human sperm tail, yet little is known about its role in human spermatozoa. STUDY DESIGN, SIZE, DURATION Sperm samples were obtained from normozoospermic men and asthenozoospermic men who visited the reproductive medical center at Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi, China between February 2018 and January 2019. In total, 27 normozoospermic men and 25 asthenozoospermic men were recruited to participate in the study. PARTICIPANTS/MATERIALS, SETTING, METHODS The level of TDRG1 in sperm of normozoospermic and asthenozoospermic men was examined by immunoblotting and immunofluorescence assays. Progressive motility was examined by computer-aided sperm analysis. The correlation between the TDRG1 protein level and progressive motility was analyzed by linear regression. TDRG1 was imported into the sperm of normozoospermic and asthenozoospermic men using a cell-penetrating peptide (CPP)-fused TDRG1 recombinant protein (CPP-TDRG1), and the progressive motility was examined. Also, the altered proteins associated with TDRG1 in asthenozoospermic sperm were detected using label-free quantification method-based quantitative proteomic technology. TDRG1-interacting proteins were identified by co-immunoprecipitation coupled with tandem mass spectrometry analysis. MAIN RESULTS AND THE ROLE OF CHANCE The mean level of TDRG1 was significantly decreased in sperm of asthenozoospermic men compared with normozoospermic men (P < 0.05) and was positively correlated with percentage of progressively motile sperm (r2 = 0.75, P = 0.0001). The introduction of TDRG1 into human sperm, using CPP, significantly increased progressive motility (P < 0.05) and improved the progressive motility of sperm from asthenozoospermic men to the normal level. TDRG1 forms a protein complex with sperm-motility related proteins in human sperm and its downregulation was associated with a decrease in other motility-related proteins. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION The sample size was limited and larger cohorts are needed for verifying the positive effect of CPP-TDRG1 on human sperm motility. Furthermore, the caution should be paid that a comprehensive safety examination would be performed to evaluate whether CPP-TDRG1 is a possible treatment approach for asthenozoospermia. WIDER IMPLICATIONS OF THE FINDINGS Our results provide new insights into the mechanisms of sperm motility which may contribute to the diagnosis and treatment for asthenozoospermia. STUDY FUNDING/COMPETING INTEREST(S) National Natural Science Foundation of China (81501317 and 81871207 to H.C.; 81771644 to T.L.; 31671204 to X.Z.; 81571432 to Y.T.). The authors have no conflicts of interest to declare.
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Affiliation(s)
- Houyang Chen
- Reproductive Medical Center, Jiangxi Maternal and Child Health Hospital, Affiliated Maternal and Child Health Hospital of Nanchang University, Nanchang, Jiangxi, China.,Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, China
| | - Liang Tang
- Reproductive Medical Center, Jiangxi Maternal and Child Health Hospital, Affiliated Maternal and Child Health Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Qing Hong
- Reproductive Medical Center, Jiangxi Maternal and Child Health Hospital, Affiliated Maternal and Child Health Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Tingting Pan
- Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, Jiangxi, China
| | - Shiqi Weng
- Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, Jiangxi, China
| | - Jie Sun
- Reproductive Medical Center, Jiangxi Maternal and Child Health Hospital, Affiliated Maternal and Child Health Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Qiongfang Wu
- Reproductive Medical Center, Jiangxi Maternal and Child Health Hospital, Affiliated Maternal and Child Health Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Xuhui Zeng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, China.,Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, Jiangxi, China
| | - Yuxin Tang
- Reproductive Department of Urology, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, PR China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, China.,Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, Jiangxi, China
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15
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Sun X, Chen W, Weng S, Pan T, Hu X, Wang F, Xia T, Chen H, Luo T. Effects of the environmental endocrine disruptors di-2-ethylhexyl phthalate and mono-2-ethylhexyl phthalate on human sperm function in vitro. Reprod Fertil Dev 2021; 32:629-636. [PMID: 32027815 DOI: 10.1071/rd19164] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 09/20/2019] [Indexed: 12/17/2022] Open
Abstract
Di-2-ethylhexyl phthalate (DEHP), a plastic-derived, endocrine-disrupting chemical, has been shown to exhibit male reproductive toxicity. However, its effects on human mature spermatozoa are largely unknown. In this study we investigated the invitro effects of DEHP and mono-2-ethylhexyl phthalate (MEHP; the main metabolite of DEHP) on sperm function and the mechanisms involved. Human spermatozoa were exposed to phthalates invitro at the doses that cover the concentrations detected in human semen: 20nM-8 μM DEHP, 1nM-20 μM MEHP or a mixture of 20nM-8 μM DEHP and 1nM-20 μM MEHP. DEHP and MEHP, alone or in combination, had no effect on the viability, membrane integrity, motility, homeostasis of reactive oxygen species or mitochondrial activity of human spermatozoa. Interestingly, 1nM-20 μM MEHP and combinations of 20nM-8 μM DEHP and 1nM-20 μM MEHP enhanced penetration ability, hyperactivation and the spontaneous acrosome reaction of human spermatozoa, and increased intracellular free Ca2+ concentrations ([Ca2+]i) and tyrosine phosphorylation, two key signalling pathways that regulate sperm function. The findings of this study suggest that invitro exposure to MEHP metabolised from DEHP affects human sperm function by inducing increases in sperm [Ca2+]i and tyrosine phosphorylation, which adds to our understanding of the effects of DEHP on male reproduction.
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Affiliation(s)
- Xinyi Sun
- Institute of Life Science and School of Life Science, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China; and Nanchang University Queen Mary School, Jiangxi Medical College of Nanchang University, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Wenqiong Chen
- Institute of Life Science and School of Life Science, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Shiqi Weng
- Institute of Life Science and School of Life Science, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Tingting Pan
- Institute of Life Science and School of Life Science, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Xiaonian Hu
- Institute of Life Science and School of Life Science, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Fang Wang
- Institute of Life Science and School of Life Science, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Tianxinyu Xia
- Institute of Life Science and School of Life Science, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China; and Nanchang University Queen Mary School, Jiangxi Medical College of Nanchang University, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China
| | - Houyang Chen
- Reproductive Medical Center, Jiangxi Maternal and Child Health Hospital, 318/81 Avenue, Nanchang, Jiangxi 330006, China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China; and Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, 999 Xuefu Road, Honggutan New District, Nanchang, Jiangxi 330031, China; and Corresponding author.
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16
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Sperm ion channels and transporters in male fertility and infertility. Nat Rev Urol 2020; 18:46-66. [PMID: 33214707 DOI: 10.1038/s41585-020-00390-9] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2020] [Indexed: 12/16/2022]
Abstract
Mammalian sperm cells must respond to cues originating from along the female reproductive tract and from the layers of the egg in order to complete their fertilization journey. Dynamic regulation of ion signalling is, therefore, essential for sperm cells to adapt to their constantly changing environment. Over the past 15 years, direct electrophysiological recordings together with genetically modified mouse models and human genetics have confirmed the importance of ion channels, including the principal Ca2+-selective plasma membrane ion channel CatSper, for sperm activity. Sperm ion channels and membrane receptors are attractive targets for both the development of contraceptives and infertility treatment drugs. Furthermore, in this era of assisted reproductive technologies, understanding the signalling processes implicated in defective sperm function, particularly those arising from genetic abnormalities, is of the utmost importance not only for the development of infertility treatments but also to assess the overall health of a patient and his children. Future studies to improve reproductive health care and overall health care as a function of the ability to reproduce should include identification and analyses of gene variants that underlie human infertility and research into fertility-related molecules.
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17
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Zhang X, Kang H, Peng L, Song D, Jiang X, Li Y, Chen H, Zeng X. Pentachlorophenol inhibits CatSper function to compromise progesterone's action on human sperm. CHEMOSPHERE 2020; 259:127493. [PMID: 32622245 DOI: 10.1016/j.chemosphere.2020.127493] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/29/2020] [Accepted: 06/19/2020] [Indexed: 06/11/2023]
Abstract
Pentachlorophenol (PCP), a highly toxic contaminant of chlorophenols, is common in a variety of environments and presents serious risks to animal and human health. However, the reproductive toxicity and potential actions of PCP have not been investigated thoroughly, especially in humans. Here, human spermatozoa were used to evaluate the effect of PCP on cell function and to explore the underlying mechanisms. PCP had no substantive effects on sperm viability or motility, nor on the ability to penetrate viscous medium, sperm hyperactivation or spontaneous acrosome reactions. However, PCP significantly inhibited these properties induced by progesterone (P4). Consistent with the functional observations, although PCP itself did not affect the basal intracellular Ca2+ concentrations and CatSper current, PCP dose-dependently inhibited increases of intracellular Ca2+ concentrations caused by P4. In addition, the activation of CatSper induced by P4 was largely suppressed by PCP. This is the first report showing that PCP may serves as an antagonist of the P4 membrane receptor to interfere with Ca2+ signaling by compromising the action of P4 on regulating sperm function. These findings suggest that the reproductive toxicity of PCP should also be a matter of concern as a mammalian health risk.
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Affiliation(s)
- Xiaoning Zhang
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong, 226019, PR China; Institute of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Hang Kang
- Institute of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Lizhong Peng
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong, 226019, PR China
| | - Dandan Song
- Institute of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Xin Jiang
- Institute of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Yanting Li
- Institute of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Houyang Chen
- Reproductive Medical Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, 330006, PR China
| | - Xuhui Zeng
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong, 226019, PR China; Institute of Life Science, Nanchang University, Nanchang, 330031, PR China.
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18
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Tamburrino L, Marchiani S, Muratori M, Luconi M, Baldi E. Progesterone, spermatozoa and reproduction: An updated review. Mol Cell Endocrinol 2020; 516:110952. [PMID: 32712385 DOI: 10.1016/j.mce.2020.110952] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 06/16/2020] [Accepted: 07/20/2020] [Indexed: 12/12/2022]
Abstract
The rapid effects of steroids on spermatozoa have been demonstrated for the first time more than three decades ago. Progesterone (P), which is present throughout the female genital tract with peaks of levels in the cumulus matrix surrounding the oocyte, has been shown to stimulate several sperm functions in vitro, including capacitation, hyperactivation, chemotaxis and acrosome reaction (AR). Besides an increase of intracellular calcium, P has been shown to activate other sperm signalling pathways including tyrosine phosphorylation of several sperm proteins. All these effects are mediated by extra-nuclear pathways likely involving interaction with molecules present on the sperm surface. In particular, the increase in intracellular calcium ([Ca2+]i) in spermatozoa from human and several other mammalian species is mediated by the sperm specific calcium channel CatSper, whose expression and function are required for sperm hyperactive motility. P-mediated CatSper activation is indeed involved in promoting sperm hyperactivation, but the involvement of this channel in other P-stimulated sperm functions, such as AR and chemotaxis, is less clear and further studies are required to disclose all the involved pathways. In human spermatozoa, responsiveness to P in terms of [Ca2+]i increase and AR is highly related to sperm fertilizing ability in vitro, suggesting that the steroid is a physiological inducer of AR during in vitro fertilization. In view of their physiological relevance, P-stimulated sperm functions are currently investigated to develop new tools to select highly performant spermatozoa for assisted reproduction.
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Affiliation(s)
- Lara Tamburrino
- Department of Experimental and Clinical Medicine, University of Florence, Viale Pieraccini 6, 50139, Florence, Italy
| | - Sara Marchiani
- Department of Experimental and Clinical Medicine, University of Florence, Viale Pieraccini 6, 50139, Florence, Italy
| | - Monica Muratori
- Department of Experimental and Clinical Biomedical Science, University of Florence, Viale Pieraccini 6, 50139, Florence, Italy
| | - Michaela Luconi
- Department of Experimental and Clinical Biomedical Science, University of Florence, Viale Pieraccini 6, 50139, Florence, Italy
| | - Elisabetta Baldi
- Department of Experimental and Clinical Medicine, University of Florence, Viale Pieraccini 6, 50139, Florence, Italy.
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19
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Luo T, Chen HY, Zou QX, Wang T, Cheng YM, Wang HF, Wang F, Jin ZL, Chen Y, Weng SQ, Zeng XH. A novel copy number variation in CATSPER2 causes idiopathic male infertility with normal semen parameters. Hum Reprod 2020; 34:414-423. [PMID: 30629171 DOI: 10.1093/humrep/dey377] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 11/20/2018] [Accepted: 11/30/2018] [Indexed: 12/28/2022] Open
Abstract
STUDY QUESTION Are genetic abnormalities in CATSPER (cation channel of sperm) genes associated with idiopathic male infertility with normal semen parameters and, if so, how do they affect male fertility? SUMMARY ANSWER A novel copy number variation (CNV) in CATSPER2 causes idiopathic male infertility with normal semen parameters by disrupting the ability of sperm to penetrate viscous media, undergo hyperactivation and respond to progesterone. WHAT IS KNOWN ALREADY CATSPER is the principle Ca2+ channel mediating extracellular Ca2+ influx into spermatozoa. Although several case reports have suggested a causal relationship between CATSPER disruption and human male infertility, whether genetic abnormalities in CATSPER genes are associated with idiopathic male infertility with normal semen parameters remains unclear. STUDY DESIGN, SIZE, DURATION Spermatozoa were obtained from men attending the reproductive medical center at Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, China between January 2014 and June 2016. In total, 120 men from infertile couples and 20 healthy male donors were selected to take part in the study, based on their normal semen parameters. PARTICIPANTS/MATERIALS, SETTING, METHODS CATSPER and KSPER currents were assessed using the whole-cell patch-clamp technique. Whole-genome sequencing and TaqMan® CNV assays were performed to identify genetic variations. The expression levels of genes encoding the CATSPER complex were measured by quantitative real-time PCR and Western blot. Sperm motion characteristics and hyperactivation were examined with a computer-aided sperm analysis (CASA) system. Sperm responses to progesterone, assessed as increases in CATSPER current and intercellular Ca2+ concentrations ([Ca2+]i), as well as inducement of penetration ability and acrosome reaction, were examined by means of whole-cell patch-clamp technique, single-sperm [Ca2+]i imaging, penetration into methylcellulose assay and chlortetracycline staining, respectively. MAIN RESULTS AND THE ROLE OF CHANCE An infertile man with complete disruption of CATSPER current was identified. This individual has a novel CNV which disrupts one gene copy in the region 43894500-43950000 in chromosome 15 (GRCh37.p13 Primary Assembly, nsv3067119), containing the whole DNA sequence of CATSPER2. This CNV affected the expression of CATSPER2, resulting in dramatically reduced levels of CATSPER2 proteins in the individual's spermatozoa. Although this individual exhibited normal semen parameters, his spermatozoa showed impaired penetration ability, deficient hyperactivation, and did not respond to progesterone, in terms of monovalent current potentiation, [Ca2+]i increase, penetration ability enhancement and acrosome reaction inducement, which may explain the individual's idiopathic infertility. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION Our novel findings require more cases to support the CATSPER2 CNV identified in this study as a common cause of idiopathic male infertility in patients with normal semen parameters. Therefore, caution must be taken when extrapolating the use of this CNV as a potential biomarker for idiopathic male infertility. WIDER IMPLICATIONS OF THE FINDINGS The findings from the unique human CATSPER 'knockout' model in this study not only confirm the essential roles of CATSPER in mediating progesterone response and regulating hyperactivation in human spermatozoa but also reveal that disruption of CATSPER current is a significant factor causing idiopathic male infertility. STUDY FUNDING/COMPETING INTEREST(S) This study was funded by National Natural Science Foundation of China (81771644 and 31400996 to T.L.; 31230034 to X.Z.); National Basic Research Program of China (973 Program, 2015CB943003 to X.Z.); National Key Research and Development Program of China (2016YFC1000905 to T.L.); Natural Science Foundation of Jiangxi, China (20121BBG70021 and GJJ12015 to X.Z.; 20161BAB204167 and 20171ACB21006 to T.L.) and the open project of National Population and Family Planning Key Laboratory of Contraceptives and Devices Research (No. 2016KF07 to T.L.). The authors have no conflicts of interest to declare.
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Affiliation(s)
- Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China.,Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, Jiangxi, PR China
| | - Hou-Yang Chen
- Reproductive Medical Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, PR China
| | - Qian-Xing Zou
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China
| | - Tao Wang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China
| | - Yi-Min Cheng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China
| | - Hua-Feng Wang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China
| | - Fang Wang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China
| | - Zhong-Lin Jin
- Reproductive Medical Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, PR China
| | - Ying Chen
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China
| | - Shi-Qi Weng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China
| | - Xu-Hui Zeng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, PR China.,Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, Jiangxi, PR China.,Jiangxi Provincial Collaborative Innovation Center for Cardiovascular, Digestive and Neuropsychiatric Diseases, Nanchang, Jiangxi, PR China
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Yeste M, Llavanera M, Mateo-Otero Y, Catalán J, Bonet S, Pinart E. HVCN1 Channels Are Relevant for the Maintenance of Sperm Motility During In Vitro Capacitation of Pig Spermatozoa. Int J Mol Sci 2020; 21:ijms21093255. [PMID: 32375375 PMCID: PMC7246839 DOI: 10.3390/ijms21093255] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/30/2020] [Accepted: 05/03/2020] [Indexed: 12/12/2022] Open
Abstract
The objective of the present study was to determine the physiological role of voltage-gated hydrogen channels 1 (HVCN1 channels) during in vitro capacitation of pig spermatozoa. Sperm samples from 20 boars were incubated in capacitating medium for 300 minutes (min) in the presence of 2-guanidino benzimidazole (2-GBI), a specific HVCN1-channel blocker, added either at 0 min or after 240 min of incubation. Control samples were incubated in capacitating medium without the inhibitor. In all samples, acrosomal exocytosis was triggered with progesterone after 240 min of incubation. Sperm viability, sperm motility and kinematics, acrosomal exocytosis, membrane lipid disorder, intracellular calcium levels and mitochondrial membrane potential were evaluated after 0, 60, 120, 180, 240, 250, 270 and 300 min of incubation. While HVCN1-blockage resulted in altered sperm viability, sperm motility and kinematics and reduced mitochondrial membrane potential as compared to control samples, at any blocker concentration and incubation time, it had a non-significant effect on intracellular Ca2+ levels determined through Fluo3-staining. The effects on acrosomal exocytosis were only significant in blocked samples at 0 min, and were associated with increased membrane lipid disorder and Ca2+ levels of the sperm head determined through Rhod5-staining. In conclusion, HVCN1 channels play a crucial role in the modulation of sperm motility and kinematics, and in Ca2+ entrance to the sperm head.
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Affiliation(s)
- Marc Yeste
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (Y.M.-O); (S.B.)
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, E-17003 Girona, Spain
| | - Marc Llavanera
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (Y.M.-O); (S.B.)
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, E-17003 Girona, Spain
| | - Yentel Mateo-Otero
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (Y.M.-O); (S.B.)
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, E-17003 Girona, Spain
| | - Jaime Catalán
- Unit of Animal Reproduction, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, Autonomous University of Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain;
| | - Sergi Bonet
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (Y.M.-O); (S.B.)
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, E-17003 Girona, Spain
| | - Elisabeth Pinart
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (Y.M.-O); (S.B.)
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, E-17003 Girona, Spain
- Correspondence: ; Tel.: +34-972-419-514
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Cheng YM, Peng Z, Chen HY, Pan TT, Hu XN, Wang F, Luo T. Posttranslational lysine 2-hydroxyisobutyrylation of human sperm tail proteins affects motility. Hum Reprod 2020; 35:494-503. [PMID: 32142584 DOI: 10.1093/humrep/dez296] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 10/26/2019] [Indexed: 12/15/2022] Open
Abstract
STUDY QUESTION Does lysine 2-hydroxyisobutyrylation, a newly identified protein posttranslational modification (PTM), occur in human sperm and affect human sperm function? SUMMARY ANSWER Lysine 2-hydroxyisobutyrylation mainly occurs in human sperm tail proteins, and excessive lysine 2-hydroxyisobutyrylation affects human sperm motility. WHAT IS KNOWN ALREADY PTM is regarded as an important pathway in regulating sperm function since mature sperm are almost transcriptionally silent. However, only phosphorylation was extensively studied in mature sperm to date. Lysine 2-hydroxyisobutyrylation, a newly characterised PTM, is broadly conserved in both eukaryotic and prokaryotic cells. Although histone lysine 2-hydroxyisobutyrylation has been shown to be associated with active gene expression in spermatogenic cells, the presence, regulatory elements and function of lysine 2-hydroxyisobutyrylation have not been characterised in mature sperm. STUDY DESIGN, SIZE, DURATION Sperm samples were obtained from normozoospermic men and asthenozoospermic men who visited the reproductive medical centre at Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, China, between May 2017 and November 2018. In total, 58 normozoospermic men and 65 asthenozoospermic men were recruited to participate in this study. PARTICIPANTS/MATERIALS, SETTING, METHODS Lysine 2-hydroxyisobutyrylation was examined using immunoblotting and immunofluorescence assays using a previously qualified pan anti-lysine 2-hydroxyisobutyrylation antibody. The immunofluorescence assay was imaged using super-resolution structured illumination microscopy. Sperm viability was examined by using the eosin staining method, and sperm motility parameters were assessed by computer-assisted sperm analysis. Sperm penetration ability was determined by evaluating the ability of the sperm to penetrate a 1% (w/v) methylcellulose solution. The level of intracellular adenosine triphosphate (ATP) was detected using a rapid bioluminescent ATP assay kit. MAIN RESULTS AND THE ROLE OF CHANCE Lysine 2-hydroxyisobutyrylation was present in several proteins (20-100 kDa) mainly located in the tail of human sperm. Sperm lysine 2-hydroxyisobutyrylation was derived from 2-hydroxyisobutyrate (2-Hib) and was regulated by acyltransferase P300 and nicotinamide adenine dinucleotide-dependent lysine deacylase sirtuins. Elevation of sperm lysine 2-hydroxyisobutyrylation by 2-Hib decreased total motility, progressive motility, penetration ability and ATP level of human sperm. Interestingly, the level of sperm lysine 2-hydroxyisobutyrylation was higher in asthenozoospermic men than that in normozoospermic men and was negatively correlated with the progressive motility of human sperm. Furthermore, high levels of lysine 2-hydroxyisobutyrylation in asthenozoospermic men accompanied decreased ATP levels. LIMITATIONS, REASONS FOR CAUTION Although the present study indicated the involvement of sperm lysine 2-hydroxyisobutyrylation in regulating human sperm motility, the underlying mechanism needs to be further illustrated. WIDER IMPLICATIONS OF THE FINDINGS The findings of this study provide insight into the novel role of lysine 2-hydroxyisobutyrylation in human sperm and suggest that abnormality of sperm lysine 2-hydroxyisobutyrylation may be one of the causes for asthenozoospermia. STUDY FUNDING/COMPETING INTEREST(S) National Natural Science Foundation of China (81771644 to T.L. and 81871207 to H.C.); Natural Science Foundation of Jiangxi province (20171ACB21006). The authors have no conflicts of interest to declare.
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Affiliation(s)
- Yi-Min Cheng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, PR China
| | - Zhen Peng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, PR China.,Department of Pharmacy, the First People's Hospital of Yichun City in Jiangxi Province, Yichun 336000, China
| | - Hou-Yang Chen
- Reproductive Medical Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang 330006, PR China
| | - Ting-Ting Pan
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, PR China
| | - Xiao-Nian Hu
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, PR China
| | - Fang Wang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, PR China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, PR China
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Yuan Y, Ding X, Cheng Y, Kang H, Luo T, Zhang X, Kuang H, Chen Y, Zeng X, Zhang D. PFOA evokes extracellular Ca 2+ influx and compromises progesterone-induced response in human sperm. CHEMOSPHERE 2020; 241:125074. [PMID: 31627108 DOI: 10.1016/j.chemosphere.2019.125074] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 10/03/2019] [Accepted: 10/07/2019] [Indexed: 06/10/2023]
Abstract
Perfluorooctane acid (PFOA), a persistent organic pollutant, is ubiquitously present in the environment and may detrimentally affect male reproductive health. In this study, mature human sperm were in vitro exposed to different concentrations of PFOA (0.25, 2.5 or 25 μg/ml) alone or in combination with progesterone (P4) to evaluate the toxicity and the potential mechanism of action. Exposure to high-dose PFOA (25 μg/ml) alone for 4 h caused a decline in capacity of human spermatozoa to penetrate synthetic mucus, with an increased production of reactive oxygen species (ROS). Furthermore, PFOA treatment (2.5 and 25 μg/ml) evoked a transient rise in intracellular calcium concentration [Ca2+]i by activating the sperm-specific CatSper channel. However, preincubation with PFOA (2.5-25 μg/ml) for 4 h significantly suppressed P4-stimulated extracellular Ca2+ influx in human spermatozoa. Moreover, PFOA pretreatment at all concentrations evaluated markedly compromised P4-induced acrosome reaction and sperm penetration into viscous medium. Taken together, these results suggest that PFOA exposure may impair human sperm function through inducing oxidative stress and disturbing P4-induced Ca2+ signaling.
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Affiliation(s)
- Yangyang Yuan
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Xinbao Ding
- Department of Biomedical Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Yimin Cheng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Hang Kang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Xiaoning Zhang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Haibin Kuang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China
| | - Ying Chen
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China
| | - Xuhui Zeng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, 330031, PR China.
| | - Dalei Zhang
- Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China.
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Luo T, Wang F, Weng S, Chen H, Kang H, Wang J, Luo S. Anethole compromises human sperm function by affecting the sperm intracellular calcium concentration and tyrosine phosphorylation. Reprod Toxicol 2020; 93:99-105. [PMID: 32004625 DOI: 10.1016/j.reprotox.2020.01.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 01/12/2020] [Accepted: 01/24/2020] [Indexed: 11/28/2022]
Abstract
Anethole is a natural anisole derivative that has been widely used in food and daily chemical industries, agricultural applications and the traditional medicine. It is closely related to aspects of daily life, and humans can easily be exposed to it. Although the reproductive toxicity of anethole was shown in the rat, its effect on human reproduction remains unknown. In this study, we examined the effect of anethole on human sperm in vitro. Different anethole doses (0.1, 1, 10, and 100 μM) were applied to ejaculated human sperm. Fertilization-essential functions, as well as the intracellular calcium concentration ([Ca2+]i) and tyrosine phosphorylation, two vital factors for regulating sperm function, were measured. The results indicated that 10 and 100 μM anethole significantly reduced the motility, hyperactivation, and penetration ability of human sperm (P < 0.05) and inhibited the increase in human sperm functions induced by progesterone, a hormone essential for sperm function activation. Additionally, 10 and 100 μM anethole decreased both basal and progesterone-increased tyrosine phosphorylation, [Ca2+]i, and the current of CATSPER, a cation channel of sperm predominant for Ca2+ influx. These results suggest that anethole inhibits human sperm functions by reducing sperm [Ca2+]i through CATSPER and suppressing tyrosine phosphorylation in vitro, raising the fact that the caution is needed when overtaking anethole.
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Affiliation(s)
- Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, 330031, PR China
| | - Fang Wang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, 330031, PR China
| | - Shiqi Weng
- Department of Horticulture, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, PR China
| | - Houyang Chen
- Reproductive Medical Center, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, PR China
| | - Hang Kang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi, 330031, PR China
| | - Jie Wang
- Department of Horticulture, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, PR China
| | - Sha Luo
- Department of Horticulture, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, PR China.
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Yang Y, Chen H, Weng S, Pan T, Chen W, Wang F, Luo T, Tang Y. In vitro exposure to metformin activates human spermatozoa at therapeutically relevant concentrations. Andrology 2020; 8:663-670. [PMID: 31944615 DOI: 10.1111/andr.12755] [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: 11/02/2019] [Revised: 12/18/2019] [Accepted: 01/10/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Metformin, a drug used to treat type 2 diabetes, has gained attention for its multiple therapeutic applications. However, little is known about its effects on human sperm function at therapeutically relevant concentration. OBJECTIVES The aim of this study was to elucidate the in vitro actions of metformin on human sperm function and explore the underlying mechanism of any effects. MATERIALS AND METHODS Human ejaculated spermatozoa were treated with therapeutically relevant concentrations (0.25, 5, 10, 20, 40, and 80 µM) of metformin in vitro. Fertilization-essential functions of spermatozoa were examined, including viability, motility, capacitation, acrosome reaction, hyperactivation, and penetration ability. The signaling pathways mediated by 5'-AMP-activated protein kinase (AMPK), intracellular calcium concentration ([Ca2+ ]i ), and tyrosine phosphorylation of spermatozoa were also measured. RESULTS Although metformin did not affect sperm viability, motility, and [Ca2+ ]i , it significantly increased the percentages of capacitated spermatozoa, acrosomal-reacted spermatozoa, and hyperactivated spermatozoa as well as penetration ability of human spermatozoa at the concentrations of 40 and 80 µM (P < .05). These concentrations of metformin also elevated the levels of phosphorylated AMPK and tyrosine phosphorylation in human spermatozoa. In addition, activation of AMPK by A769662 (an AMPK activator) had similar effects to metformin on human spermatozoa, while inhibition of AMPK by Compound C (an AMPK inhibitor) suppressed the enhancement of metformin on human spermatozoa. CONCLUSION Our findings indicate that metformin activates human sperm function through an AMPK-related mechanism which increases tyrosine phosphorylation at therapeutically relevant concentrations, thereby suggesting its improvement on human sperm function when treating subfertile males of type 2 diabetes.
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Affiliation(s)
- Yuan Yang
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Houyang Chen
- Reproductive Medical Center, Jiangxi Maternal and Child Health Hospital, Nanchang, China
| | - Shiqi Weng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, China
| | - Tingting Pan
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, China
| | - Wenqiong Chen
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, China
| | - Fang Wang
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, China
| | - Yuxin Tang
- Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, China.,Reproductive Department of Urology, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China
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Trebichalská Z, Holubcová Z. Perfect date-the review of current research into molecular bases of mammalian fertilization. J Assist Reprod Genet 2020; 37:243-256. [PMID: 31909446 PMCID: PMC7056734 DOI: 10.1007/s10815-019-01679-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 12/22/2019] [Indexed: 12/21/2022] Open
Abstract
Fertilization is a multistep process during which two terminally differentiated haploid cells, an egg and a sperm, combine to produce a totipotent diploid zygote. In the early 1950s, it became possible to fertilize mammalian eggs in vitro and study the sequence of cellular and molecular events leading to embryo development. Despite all the achievements of assisted reproduction in the last four decades, remarkably little is known about the molecular aspects of human conception. Current fertility research in animal models is casting more light on the complexity of the process all our lives start with. This review article provides an update on the investigation of mammalian fertilization and highlights the practical implications of scientific discoveries in the context of human reproduction and reproductive medicine.
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Affiliation(s)
- Zuzana Trebichalská
- Faculty of Medicine, Department of Histology and Embryology, Masaryk University, Kamenice 5, Brno, Czech Republic
| | - Zuzana Holubcová
- Faculty of Medicine, Department of Histology and Embryology, Masaryk University, Kamenice 5, Brno, Czech Republic. .,Reprofit International, Clinic of Reproductive Medicine, Brno, Czech Republic.
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Rehfeld A, Andersson AM, Skakkebæk NE. Bisphenol A Diglycidyl Ether (BADGE) and Bisphenol Analogs, but Not Bisphenol A (BPA), Activate the CatSper Ca 2+ Channel in Human Sperm. Front Endocrinol (Lausanne) 2020; 11:324. [PMID: 32508751 PMCID: PMC7248311 DOI: 10.3389/fendo.2020.00324] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 04/27/2020] [Indexed: 12/15/2022] Open
Abstract
Aim: Evidence suggests that bisphenol A diglycidyl ether (BADGE), bisphenol A (BPA), and BPA analogs can interfere with human male fertility. However, the effect directly on human sperm function is not known. The CatSper Ca2+ channel in human sperm controls important sperm functions and is necessary for normal male fertility. Environmental chemicals have been shown to activate CatSper and thereby affect Ca2+ signaling in human sperm. BPA has previously been investigated for effects on Ca2+ signaling human sperm, whereas the effects of other BPA analogs are currently unknown. The aim of this study is thus to characterize the effect of BADGE, BPA, and the eight analogs BPG, BPAF, BPC, BPB, BPBP, BPE, BPF, BPS on Ca2+ signaling, and CatSper in human sperm. Methods: Direct effects of the bisphenols on Ca2+ signaling in human sperm cells were evaluated using a Ca2+ fluorimetric assay measuring changes in intracellular Ca2+. Effects via CatSper were assessed using the specific CatSper inhibitor RU1968. Effects on human sperm function was assessed using an image cytometry-based acrosome reaction assay and the modified Kremer's sperm-mucus penetration assay. Results: At 10 μM the bisphenols BPG, BPAF, BPC, BADGE, BPB, and BPBP induced Ca2+ signals in human sperm cells, whereas BPE, BPF, BPS, and BPA had no effect. The efficacy of the chemicals at 10 μM is BPG > BPAF > BPC > BADGE > BPB > BPBP. Dose-response relations of BPG, BPAF, BPC, BADGE, BPB, and BPBP yielded EC50-values in the nM-μM range. The induced Ca2+ signals were almost completely abolished using the CatSper inhibitor RU1968, indicating an effect of the bisphenols on CatSper. All bisphenols, except BPBP, were found to dose-dependently inhibit progesterone-induced Ca2+ signals, with BPG and BPAF displaying inhibition even in low μM doses. BPG and BPAF were shown to affect human sperm function in a progesterone-like manner. Conclusion: Our results show that the bisphenols BPG, BPAF, BPC, BADGE, BPB, and BPBP can affect Ca2+ signaling in human sperm cells through activation of CatSper. This could potentially disrupt human sperm function by interfering with normal CatSper-signaling and thus be a contributing factor in human infertility, either alone or in mixtures with other chemicals.
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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
- *Correspondence: Anders Rehfeld
| | - A. M. 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), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - N. E. 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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Yeste M, Llavanera M, Pérez G, Scornik F, Puig-Parri J, Brugada R, Bonet S, Pinart E. Elucidating the Role of K + Channels during In Vitro Capacitation of Boar Spermatozoa: Do SLO1 Channels Play a Crucial Role? Int J Mol Sci 2019; 20:E6330. [PMID: 31847486 PMCID: PMC6940911 DOI: 10.3390/ijms20246330] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/05/2019] [Accepted: 12/13/2019] [Indexed: 01/16/2023] Open
Abstract
This study sought to identify and localize SLO1 channels in boar spermatozoa by immunoblotting and immunofluorescence, and to determine their physiological role during in vitro sperm capacitation. Sperm samples from 14 boars were incubated in a capacitation medium for 300 min in the presence of paxilline (PAX), a specific SLO1-channel blocker, added either at 0 min or after 240 min of incubation. Negative controls were incubated in capacitation medium, and positive controls in capacitation medium plus tetraethyl ammonium (TEA), a general K+-channel blocker, also added at 0 min or after 240 min of incubation. In all samples, acrosome exocytosis was triggered with progesterone after 240 min of incubation. Sperm motility and kinematics, integrity of plasma and acrosome membranes, membrane lipid disorder, intracellular calcium levels and acrosin activity were evaluated after 0, 60, 120, 180, 240, 250, 270 and 300 min of incubation. In boar spermatozoa, SLO1 channels were found to have 80 kDa and be localized in the anterior postacrosomal region and the mid and principal piece of the tail; their specific blockage through PAX resulted in altered calcium levels and acrosome exocytosis. As expected, TEA blocker impaired in vitro sperm capacitation, by altering sperm motility and kinematics and calcium levels. In conclusion, SLO1 channels are crucial for the acrosome exocytosis induced by progesterone in in vitro capacitated boar spermatozoa.
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Affiliation(s)
- Marc Yeste
- Unit of Cell Biology, Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Faculty of Sciences, Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (J.P.-P.); (S.B.)
| | - Marc Llavanera
- Unit of Cell Biology, Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Faculty of Sciences, Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (J.P.-P.); (S.B.)
| | - Guillermo Pérez
- Department of Medical Sciences, Faculty of Medicine, University of Girona, E-17003 Girona, Spain; (G.P.); (F.S.); (R.B.)
- Cardiovascular Genetics Group, Girona Biomedical Research Institute (IDIBGI), E-17190 Girona, Spain
- Biomedical Research Networking Center on Cardiovascular Diseases (CIBERCV), E-28029 Madrid, Spain
| | - Fabiana Scornik
- Department of Medical Sciences, Faculty of Medicine, University of Girona, E-17003 Girona, Spain; (G.P.); (F.S.); (R.B.)
- Cardiovascular Genetics Group, Girona Biomedical Research Institute (IDIBGI), E-17190 Girona, Spain
- Biomedical Research Networking Center on Cardiovascular Diseases (CIBERCV), E-28029 Madrid, Spain
| | - Josep Puig-Parri
- Unit of Cell Biology, Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Faculty of Sciences, Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (J.P.-P.); (S.B.)
| | - Ramon Brugada
- Department of Medical Sciences, Faculty of Medicine, University of Girona, E-17003 Girona, Spain; (G.P.); (F.S.); (R.B.)
- Cardiovascular Genetics Group, Girona Biomedical Research Institute (IDIBGI), E-17190 Girona, Spain
- Biomedical Research Networking Center on Cardiovascular Diseases (CIBERCV), E-28029 Madrid, Spain
- Cardiology Service, Hospital Josep Trueta, E-17003 Girona, Spain
| | - Sergi Bonet
- Unit of Cell Biology, Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Faculty of Sciences, Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (J.P.-P.); (S.B.)
| | - Elisabeth Pinart
- Unit of Cell Biology, Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Faculty of Sciences, Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain; (M.Y.); (M.L.); (J.P.-P.); (S.B.)
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Wu K, Mei C, Chen Y, Guo L, Yu Y, Huang D. C-type natriuretic peptide regulates sperm capacitation by the cGMP/PKG signalling pathway via Ca 2+ influx and tyrosine phosphorylation. Reprod Biomed Online 2019; 38:289-299. [PMID: 30655075 DOI: 10.1016/j.rbmo.2018.11.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 11/21/2018] [Accepted: 11/23/2018] [Indexed: 12/13/2022]
Abstract
RESEARCH QUESTION What is the effect of C-type natriuretic peptide (CNP) on human sperm capacitation in vitro and what is the mechanism of this effect? DESIGN CNP/NPR-B expression in the female rat genital tract was examined by immunohistochemistry and western blot assay, and then the role of CNP in human sperm capacitation was determined. The signal transduction pathway of CNP in the process was determined to elucidate the regulation mechanism of CNP by enzyme-linked immunosorbent assay and flow cytometry. RESULTS Both CNP and NPR-B were expressed in the genital tract of female rats, especially in the mucosa epithelium cell of the oviduct; the CNP level in the rat oviduct was higher than that in the cervix. Both CNP and NPR-B level in the rat oviduct varied during the oestrus cycle, maximal expression being observed at proestrus. Furthermore, intracellular cGMP level in spermatozoa was significantly enhanced by CNP (P < 0.01). PKG activity was detected in the spermatozoa, and it can be activated by the CNP and 8-Br-cGMP (cGMP analogue). The PKG inhibitor KT5823 inhibited the effect of CNP on sperm hyperactivation and the acrosome reaction. Finally, Ca2+ and tyrosine phosphorylation levels in spermatozoa were markedly improved by CNP and 8-Br-cGMP but significantly inhibited by the addition of KT5823 (P < 0.05). CONCLUSIONS CNP secreted by the female genital tract might bind to NPR-B on the spermatozoa. It successively stimulated intracellular cGMP/PKG signalling, increased Ca2+ and tyrosine-phosphorylated proteins, promoted hyperactivation and induced the acrosome reaction, which ultimately facilitated sperm capacitation.
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Affiliation(s)
- Kejia Wu
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Zhongnan Hospital, Wuhan University, Wuhan 430071, China
| | - Chunlei Mei
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yao Chen
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Reproductive Medicine Centre of Jingzhou Central Hospital, Jingzhou 434000, China
| | - Lidan Guo
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yuejin Yu
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Donghui Huang
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
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29
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Lv MG, Chen WQ, Weng SQ, Chen HY, Cheng YM, Luo T. Rosmarinic acid compromises human sperm functions by an intracellular Ca 2+ concentration-related mechanism. Reprod Toxicol 2018; 81:58-63. [PMID: 30009954 DOI: 10.1016/j.reprotox.2018.07.079] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 06/08/2018] [Accepted: 07/12/2018] [Indexed: 11/25/2022]
Abstract
Rosmarinic acid (RA), a natural phenolic ester, is cytoprotective for male reproduction in animal models. The present study investigated the in vitro actions of RA on human sperm functions. Human sperm were exposed to 1, 10, 100, and 1000 μM RA in vitro and sperm functions were examined. The results showed that although RA did not affect human sperm viability, RA at 10-1000 μM dose-dependently reduced sperm motility, penetration ability, capacitation, and spontaneous acrosome reaction. In addition, the intracellular Ca2+ concentration ([Ca2+]i), which serve as a key regulator of sperm function, was decreased by RA (10-1000 μM) in a dose-dependent manner. Furthermore, the current of the sperm-specific potassium channel, KSPER, which is predominant for Ca2+ influx in sperm, was dose-dependently inhibited by 10-1000 μM RA. Therefore, we conclude that in vitro exposure to RA can compromise human sperm functions by decreasing sperm [Ca2+]i through the suppression of KSPER current.
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Affiliation(s)
- Meng-Ge Lv
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, China; Nanchang University Queen Mary School, Jiangxi Medical College of Nanchang University, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Wen-Qiong Chen
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Shi-Qi Weng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Hou-Yang Chen
- Reproductive Medical Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi 330006, China
| | - Yi-Min Cheng
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Tao Luo
- Institute of Life Science and School of Life Science, Nanchang University, Nanchang, Jiangxi 330031, China; Key Laboratory of Reproductive Physiology and Pathology in Jiangxi Province, Nanchang, Jiangxi 330031, China.
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Rehfeld A, Egeberg DL, Almstrup K, Petersen JH, Dissing S, Skakkebæk NE. EDC IMPACT: Chemical UV filters can affect human sperm function in a progesterone-like manner. Endocr Connect 2018; 7:16-25. [PMID: 28874401 PMCID: PMC5744631 DOI: 10.1530/ec-17-0156] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 09/05/2017] [Indexed: 12/20/2022]
Abstract
Human sperm cell function must be precisely regulated to achieve natural fertilization. Progesterone released by the cumulus cells surrounding the egg induces a Ca2+ influx into human sperm cells via the CatSper Ca2+-channel and thereby controls sperm function. Multiple chemical UV filters have been shown to induce a Ca2+ influx through CatSper, thus mimicking the effect of progesterone on Ca2+ signaling. We hypothesized that these UV filters could also mimic the effect of progesterone on sperm function. We examined 29 UV filters allowed in sunscreens in the US and/or EU for their ability to affect acrosome reaction, penetration, hyperactivation and viability in human sperm cells. We found that, similar to progesterone, the UV filters 4-MBC, 3-BC, Meradimate, Octisalate, BCSA, HMS and OD-PABA induced acrosome reaction and 3-BC increased sperm penetration into a viscous medium. The capacity of the UV filters to induce acrosome reaction and increase sperm penetration was positively associated with the ability of the UV filters to induce a Ca2+ influx. None of the UV filters induced significant changes in the proportion of hyperactivated cells. In conclusion, chemical UV filters that mimic the effect of progesterone on Ca2+ signaling in human sperm cells can similarly mimic the effect of progesterone on acrosome reaction and sperm penetration. Human exposure to these chemical UV filters may impair fertility by interfering with sperm function, e.g. through induction of premature acrosome reaction. Further studies are needed to confirm the results in vivo.
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Affiliation(s)
- A Rehfeld
- Department of Growth and ReproductionCopenhagen University Hospital, Rigshospitalet, Denmark
- Department of Cellular and Molecular MedicineFaculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC)University of Copenhagen, Rigshospitalet, Denmark
| | - D L Egeberg
- Department of Growth and ReproductionCopenhagen University Hospital, Rigshospitalet, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC)University of Copenhagen, Rigshospitalet, Denmark
| | - K Almstrup
- Department of Growth and ReproductionCopenhagen University Hospital, Rigshospitalet, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC)University of Copenhagen, Rigshospitalet, Denmark
| | - J H Petersen
- Department of Growth and ReproductionCopenhagen University Hospital, Rigshospitalet, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC)University of Copenhagen, Rigshospitalet, Denmark
- Department of BiostatisticsUniversity of Copenhagen, Copenhagen, Denmark
| | - S Dissing
- Department of Cellular and Molecular MedicineFaculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - N E Skakkebæk
- Department of Growth and ReproductionCopenhagen University Hospital, Rigshospitalet, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC)University of Copenhagen, Rigshospitalet, Denmark
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Sun XH, Zhu YY, Wang L, Liu HL, Ling Y, Li ZL, Sun LB. The Catsper channel and its roles in male fertility: a systematic review. Reprod Biol Endocrinol 2017; 15:65. [PMID: 28810916 PMCID: PMC5558725 DOI: 10.1186/s12958-017-0281-2] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 08/03/2017] [Indexed: 12/22/2022] Open
Abstract
The Catsper channel is a sperm-specific, Ca2+-permeable, pH-dependent, and low voltage-dependent channel that is essential for the hyperactivity of sperm flagellum, chemotaxis towards the egg, capacitation and acrosome reaction. All of these physiological events require calcium entry into sperm cells. Remarkably, Catsper genes are exclusively expressed in the testis during spermatogenesis, and are sensitive to ion channel-induced pH change, such as NHEs, Ca2+ATPase, K+ channel, Hv1 channel and HCO3- transporters. Furthermore, the Catsper channel is regulated by some physiological stimulants, such as progesterone, cyclic nucleotides (e.g., cAMP, cGMP), zona pellucida (ZP) glycoproteins and bovine serum albumin (BSA). All of these factors normally stimulate Ca2+ entry into sperm through the Catsper channel. In addition, the Catsper channel may be a potential target for male infertility treatment or contraception. This review will focus on the structure, functions, regulation mechanisms and medicinal targets of the Catsper channel.
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Affiliation(s)
- Xiang-hong Sun
- grid.412521.1Department of pharmacy, the affiliated hospital of Qingdao University Medical College, Qingdao, 266555 China
| | - Ying-ying Zhu
- 0000 0001 0455 0905grid.410645.2Department of pharmacy, College of pharmacy of Qingdao University, Qingdao, China
| | - Lin Wang
- grid.412521.1Department of clinical laboratory, the affiliated hospital of Qingdao University Medical College, Qingdao, China
| | - Hong-ling Liu
- grid.412521.1Department of pharmacy, the affiliated hospital of Qingdao University Medical College, Qingdao, 266555 China
| | - Yong Ling
- grid.412521.1Department of pharmacy, the affiliated hospital of Qingdao University Medical College, Qingdao, 266555 China
| | - Zong-li Li
- grid.412521.1Department of pharmacy, the affiliated hospital of Qingdao University Medical College, Qingdao, 266555 China
| | - Li-bo Sun
- grid.412521.1Department of pharmacy, the affiliated hospital of Qingdao University Medical College, Qingdao, 266555 China
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