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Maitan P, Bromfield EG, Stout TAE, Gadella BM, Leemans B. A stallion spermatozoon's journey through the mare's genital tract: In vivo and in vitro aspects of sperm capacitation. Anim Reprod Sci 2022; 246:106848. [PMID: 34556396 DOI: 10.1016/j.anireprosci.2021.106848] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 09/03/2021] [Accepted: 09/04/2021] [Indexed: 12/14/2022]
Abstract
Conventional in vitro fertilization is not efficacious when working with equine gametes. Although stallion spermatozoa bind to the zona pellucida in vitro, these gametes fail to initiate the acrosome reaction in the vicinity of the oocyte and cannot, therefore, penetrate into the perivitelline space. Failure of sperm penetration most likely relates to the absence of optimized in vitro fertilization media containing molecules essential to support stallion sperm capacitation. In vivo, the female reproductive tract, especially the oviductal lumen, provides an environmental milieu that appropriately regulates interactions between the gametes and promotes fertilization. Identifying these 'fertilization supporting factors' would be a great contribution for development of equine in vitro fertilization media. In this review, a description of the current understanding of the interactions stallion spermatozoa undergo during passage through the female genital tract, and related specific molecular changes that occur at the sperm plasma membrane is provided. Understanding these molecular changes may hold essential clues to achieving successful in vitro fertilization with equine gametes.
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Affiliation(s)
- Paula Maitan
- Departments of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 112, 3584 CM Utrecht, The Netherlands; Department of Veterinary Sciences, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | - Elizabeth G Bromfield
- Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, The Netherlands; Priority Research Centre for Reproductive Science, College of Engineering, Science and Environment, University of Newcastle, Australia
| | - Tom A E Stout
- Departments of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 112, 3584 CM Utrecht, The Netherlands
| | - Bart M Gadella
- Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, The Netherlands; Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, The Netherlands
| | - Bart Leemans
- Departments of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 112, 3584 CM Utrecht, The Netherlands.
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2
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Contreras MJ, Arias ME, Silva M, Cabrera P, Felmer R. Effect of cholestanol and cholesterol-loaded cyclodextrin on stallion sperm function and capacitation post-cryopreservation. Theriogenology 2022; 189:1-10. [PMID: 35714521 DOI: 10.1016/j.theriogenology.2022.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 05/06/2022] [Accepted: 06/06/2022] [Indexed: 10/18/2022]
Abstract
Cryopreservation of stallion semen is less efficient than other species such as bovine. This is mainly because of the greater susceptibility of stallion sperm to the freezing damage that generates oxidative stress and plasma membrane injury, resulting in DNA fragmentation and cell death. These data suggest the need to develop new strategies of sperm cryopreservation that can improve the efficiency of this technique in stallions by reducing or preventing membrane damage and cell death. The present study aimed to evaluate the effect of adding membrane stabilizers to the freezing medium and assess the quality and in vitro capacitation of stallion sperm after thawing. Semen samples from three stallions frozen with membrane stabilizers (cholesterol-loaded cyclodextrin and cholestanol-loaded cyclodextrin) were evaluated in two experiments: i) sperm quality and functional analysis after thawing, and ii) sperm quality and functional analysis after 4 h of post-thaw incubation in capacitating conditions. Plasma membrane integrity, mitochondrial membrane potential, membrane lipid disorder, intracellular Ca2+, tyrosine phosphorylation, acrosome reaction, DNA damage, sperm motility, and binding to the zona pellucida were assessed. The results showed that cholesterol-loaded cyclodextrin was the stabilizer that most efficiently reduced the membrane disruption and post-thaw cell damage. In addition, this stabilizer made it possible to obtain in vitro capacitated sperm showing higher plasma membrane integrity, mitochondrial membrane potential, sperm motility, binding to the zona pellucida and better response to in vitro capacitating conditions.
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Affiliation(s)
- María José Contreras
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile; Doctoral Program in Applied Cell and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - María Elena Arias
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile; Department of Agricultural Production, Faculty of Agriculture and Forestry Sciences, Universidad de La Frontera, Temuco, Chile
| | - Mauricio Silva
- Department of Veterinary Sciences and Public Health, Universidad Catolica de Temuco, Temuco, Chile
| | - Paulina Cabrera
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile; Doctoral Program in Applied Cell and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - Ricardo Felmer
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile; Department of Agricultural Sciences and Natural Resources, Faculty of Agriculture and Forestry Sciences, Universidad de La Frontera, Temuco, Chile.
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3
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Umehara T, Tsujita N, Goto M, Tonai S, Nakanishi T, Yamashita Y, Shimada M. Methyl-beta cyclodextrin and creatine work synergistically under hypoxic conditions to improve the fertilization ability of boar ejaculated sperm. Anim Sci J 2021; 91:e13493. [PMID: 33314533 DOI: 10.1111/asj.13493] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 11/04/2020] [Accepted: 11/09/2020] [Indexed: 01/06/2023]
Abstract
Although successful fertilization is completed by only 150 sperm in the pig oviduct, more than 50,000 sperms are required to achieve a fertilization rate of more than 70% by pig in vitro fertilization (IVF). In this study, to improve the efficiency of pig IVF, the effects of hypoxic conditions and treatment with creatine and methyl-beta cyclodextrin (MβCD) on the glycolytic pathway were investigated. Under low O2 conditions, zig-zag motility was strongly induced within 30 min; however, the induction disappeared at 60 min. Although caffeine suppressed zig-zag motility under low O2 conditions, creatine induced and sustained zig-zag motility until 120 min. Additionally, pretreatment with MβCD for 15 min greatly enhanced zig-zag motility via ATP production in sperm incubated with creatine under low O2 conditions. Sperm pretreated with MβCD were used for IVF in medium containing creatine under low O2 conditions. A fertilization rate of approximately 70% was achieved with only 1.0 x 104 sperms/mL, and there were few polyspermic embryos. Therefore, our novel method was beneficial for efficient production of pig embryos in vitro. Moreover, the zig-zag motility may be a novel movement which boar capacitated sperm exhibit in the culture medium.
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Affiliation(s)
- Takashi Umehara
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Natsumi Tsujita
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Masaaki Goto
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan.,Livestock Research Institute, Oita Prefectural Agriculture, Forestry and Fisheries Research Center, Oita, Japan
| | - Shingo Tonai
- Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima, Shobara, Japan
| | - Tomoya Nakanishi
- Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima, Shobara, Japan
| | - Yasuhisa Yamashita
- Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima, Shobara, Japan
| | - Masayuki Shimada
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
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4
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Šabović I, Cosci I, De Toni L, Ferramosca A, Stornaiuolo M, Di Nisio A, Dall'Acqua S, Garolla A, Foresta C. Perfluoro-octanoic acid impairs sperm motility through the alteration of plasma membrane. J Endocrinol Invest 2020; 43:641-652. [PMID: 31776969 DOI: 10.1007/s40618-019-01152-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/19/2019] [Indexed: 12/27/2022]
Abstract
CONTEXT Perfluoroalkyl-substances (PFAS) are chemical additives considered harmful for humans. We recently showed that accumulation of perfluoro-octanoic acid (PFOA) in human semen of exposed subjects was associated with altered motility parameters of sperm cells, suggesting direct toxicity. OBJECTIVES To determine whether direct exposure of human spermatozoa to PFOA was associated to impairment of cell function. PATIENTS AND METHODS Spermatozoa isolated from semen samples of ten normozoospermic healthy donors were exposed up to 2 h to PFOA, at concentrations from 0.1 to 10 ng/mL. Viability and motility parameters were evaluated by Sperm Class Analyser. Cell respiratory function was assessed by both mitochondrial probe JC-1 and respiratory control ratio (RCR) determination. Sperm accumulation of PFOA was quantified by liquid chromatography-mass spectrometry. Expression of organic ion-transporters OATP1 and SLCO1B2 was assessed by immunofluorescence and respective role in PFOA accumulation was evaluated by either blockade with probenecid or membrane scavenging through β-cyclodextrin (β-CD). Plasma membrane fluidity and electrochemical potential (ΔΨp) were evaluated, respectively, with Merocyanine-540 and Di-3-ANEPPDHQ fluorescent probes. RESULTS Compared to untreated controls, a threefold increase of the percentage of non-motile sperms was observed after 2 h of exposure to PFOA regardless of the concentration of PFOA, whilst RCR was significantly reduced. Only scavenging with β-CD was effective in reducing PFOA accumulation, suggesting membrane involvement. Altered membrane fluidity, reduced ΔΨp and sperm motility loss associated with exposure to PFOA were reverted by β-CD treatment. CONCLUSION PFOA alters human sperm motility through plasma-membrane disruption, an effect recovered by incubation with β-CD.
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Affiliation(s)
- I Šabović
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - I Cosci
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
- Familial Cancer Clinic, Veneto Institute of Oncology (IOV-IRCCS), Padua, Italy
| | - L De Toni
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - A Ferramosca
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
| | - M Stornaiuolo
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - A Di Nisio
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - S Dall'Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padua, Italy
| | - A Garolla
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy
| | - C Foresta
- Department of Medicine and Unit of Andrology and Reproductive Medicine, University of Padova, Via Giustiniani, 2, 35128, Padua, Italy.
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5
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Leemans B, Stout TAE, De Schauwer C, Heras S, Nelis H, Hoogewijs M, Van Soom A, Gadella BM. Update on mammalian sperm capacitation: how much does the horse differ from other species? Reproduction 2020; 157:R181-R197. [PMID: 30721132 DOI: 10.1530/rep-18-0541] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 02/04/2019] [Indexed: 12/21/2022]
Abstract
In contrast to various other mammalian species, conventional in vitro fertilization (IVF) with horse gametes is not reliably successful. In particular, stallion spermatozoa fails to penetrate the zona pellucida, most likely due to incomplete activation of stallion spermatozoa (capacitation) under in vitro conditions. In other mammalian species, specific capacitation triggers have been described; unfortunately, none of these is able to induce full capacitation in stallion spermatozoa. Nevertheless, knowledge of capacitation pathways and their molecular triggers might improve our understanding of capacitation-related events observed in stallion sperm. When sperm cells are exposed to appropriate capacitation triggers, several molecular and biochemical changes should be induced in the sperm plasma membrane and cytoplasm. At the level of the sperm plasma membrane, (1) an increase in membrane fluidity, (2) cholesterol depletion and (3) lipid raft aggregation should occur consecutively; the cytoplasmic changes consist of protein tyrosine phosphorylation and elevated pH, cAMP and Ca2+ concentrations. These capacitation-related events enable the switch from progressive to hyperactivated motility of the sperm cells, and the induction of the acrosome reaction. These final capacitation triggers are indispensable for sperm cells to migrate through the viscous oviductal environment, penetrate the cumulus cells and zona pellucida and, finally, fuse with the oolemma. This review will focus on molecular aspects of sperm capacitation and known triggers in various mammalian species. Similarities and differences with the horse will be highlighted to improve our understanding of equine sperm capacitation/fertilizing events.
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Affiliation(s)
- Bart Leemans
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Tom A E Stout
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.,Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Catharina De Schauwer
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Sonia Heras
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Hilde Nelis
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Maarten Hoogewijs
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Ann Van Soom
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Bart M Gadella
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.,Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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6
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Bernabò N, Machado-Simoes J, Valbonetti L, Ramal-Sanchez M, Capacchietti G, Fontana A, Zappacosta R, Palestini P, Botto L, Marchisio M, Lanuti P, Ciulla M, Di Stefano A, Fioroni E, Spina M, Barboni B. Graphene Oxide increases mammalian spermatozoa fertilizing ability by extracting cholesterol from their membranes and promoting capacitation. Sci Rep 2019; 9:8155. [PMID: 31148593 PMCID: PMC6544623 DOI: 10.1038/s41598-019-44702-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 05/14/2019] [Indexed: 11/09/2022] Open
Abstract
Graphene Oxide (GO) is a widely used biomaterial with an amazing variety of applications in biology and medicine. Recently, we reported the ability of GO to improve the in vitro fertilization (IVF) outcomes in swine, a validated animal model with a high predictive value for human fertility. For that reason, here we characterized the mechanisms involved in this positive interaction by adopting an experimental approach combining biological methods (confocal microscopy analysis on single cell, flow cytometry on cell populations and co-incubation with epithelial oviductal cells), physical-chemical techniques (Differential Scanning Calorimetry and Thermogravimetric Analysis), and chemical methods (mass spectrometry and lipid measurement). As a result, we propose a model in which GO is able to extract cholesterol from the spermatozoa membrane without causing any detrimental effect. In this way, the cholesterol extraction promotes a change in membrane chemical-physical properties that could positively affect male gamete function, modulating sperm signalling function and increasing in this way the fertilizing potential, without losing the ability to physiologically interact with the female environment. In conclusion, these data seem to suggest new intriguing possibilities in engineering sperm membrane for improving assisted reproduction technologies outcomes, even in human medicine.
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Affiliation(s)
- Nicola Bernabò
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Via Renato Balzarini 1, 64100, Teramo, Italy.
| | - Juliana Machado-Simoes
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Via Renato Balzarini 1, 64100, Teramo, Italy
| | - Luca Valbonetti
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Via Renato Balzarini 1, 64100, Teramo, Italy
| | - Marina Ramal-Sanchez
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Via Renato Balzarini 1, 64100, Teramo, Italy
| | - Giulia Capacchietti
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Via Renato Balzarini 1, 64100, Teramo, Italy
| | - Antonella Fontana
- Department of Pharmacy, University "G. d'Annunzio", Via dei Vestini, 66100, Chieti, Italy
| | - Romina Zappacosta
- Department of Pharmacy, University "G. d'Annunzio", Via dei Vestini, 66100, Chieti, Italy
| | - Paola Palestini
- School of Medicine and Surgery, University of Milano Bicocca, 20900, Monza, Italy
| | - Laura Botto
- School of Medicine and Surgery, University of Milano Bicocca, 20900, Monza, Italy
| | - Marco Marchisio
- Department of Medicine and Aging Sciences, University "G. d'Annunzio" Chieti-Pescara, 66100, Chieti, Italy.,Center on Aging Sciences and Translational Medicine (CeSI-MeT), University "G. d'Annunzio" Chieti-Pescara, 66100, Chieti, Italy
| | - Paola Lanuti
- Department of Medicine and Aging Sciences, University "G. d'Annunzio" Chieti-Pescara, 66100, Chieti, Italy.,Center on Aging Sciences and Translational Medicine (CeSI-MeT), University "G. d'Annunzio" Chieti-Pescara, 66100, Chieti, Italy
| | - Michele Ciulla
- Department of Pharmacy, University "G. d'Annunzio", Via dei Vestini, 66100, Chieti, Italy
| | - Antonio Di Stefano
- Department of Pharmacy, University "G. d'Annunzio", Via dei Vestini, 66100, Chieti, Italy
| | - Elena Fioroni
- Laboratorio Analisi Dr. Fioroni, Viale A. de Gasperi, 19, 63074, San Benedetto del Tronto, Italy
| | - Michele Spina
- Laboratorio Analisi Dr. Fioroni, Viale A. de Gasperi, 19, 63074, San Benedetto del Tronto, Italy
| | - Barbara Barboni
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Via Renato Balzarini 1, 64100, Teramo, Italy
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7
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Bai C, Kang N, Zhao J, Dai J, Gao H, Chen Y, Dong H, Huang C, Dong Q. Cryopreservation disrupts lipid rafts and heat shock proteins in yellow catfish sperm. Cryobiology 2019; 87:32-39. [PMID: 30876909 DOI: 10.1016/j.cryobiol.2019.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/06/2019] [Accepted: 03/08/2019] [Indexed: 11/25/2022]
Abstract
Lipid rafts and associated membrane proteins (flotillin, caveolin) play important roles in cell signaling and sperm fertilization while heat shock proteins (Hsp) ensure properly protein folding to fulfill their physiological functions. The markedly reduced fertility in thawed sperm after cryopreservation could result from disrupted membrane lipid rafts and these proteins. To explore the effect of sperm cryopreservation on lipid rafts and heat shock proteins, we compared lipid raft integrity, and the expression levels of lipid raft associated proteins (Flot-1, Flot-2, Cav-1) as well as heat shock proteins (Hsp90, Hsp70) in fresh and thawed sperm cryopreserved under different scenarios in yellow catfish. We found higher lipid raft integrity, higher protein expression levels of Flot-1, Flot-2, Cav-1, Hsp90, and Hsp70 in fresh sperm samples than in thawed sperm samples, in thawed sperm samples cryopreserved with optimal cooling rate than those cryopreserved with sub-optimal cooling rate, and in thawed sperm samples cryopreserved with extenders supplemented with cholesterol than those supplemented with methyl-β-cyclodextrin (for cholesterol removal). Our findings indicate that lipid raft integrity, and expression levels of Flot-1, Flot-2, Cav-1, Hsp90, and Hsp70 are clearly associated with sperm quality, and together they may play a cumulative role in reduced fertility associated with thawed sperm in aquatic species.
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Affiliation(s)
- Chenglian Bai
- The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, PR China; Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Ning Kang
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Junping Zhao
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Jun Dai
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Hui Gao
- The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, PR China; Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Yuanhong Chen
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Haojia Dong
- Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Changjiang Huang
- The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, PR China; Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Qiaoxiang Dong
- The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, PR China; Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, PR China.
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8
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Almadaly EA, Farrag FA, Nasr NE. Protein and lipid species in seminal plasma of fertile Holstein-Friesian bulls. BULGARIAN JOURNAL OF VETERINARY MEDICINE 2019. [DOI: 10.15547/bjvm.2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Protein and lipid molecules in seminal plasma (SP) collected from fertile bulls were investigated. Semen was collected from 10 bulls (2 ejaculates each) and examined for standard semen analysis. Raw SP was recovered by centrifugation and total protein (TP) concentration was determined using a refractometer. Raw SP was desalted using a Sephadex G-25 desalting column then both raw and desalted SP was subjected to SDS-PAGE. Neutral lipids and phospholipids of raw and desalted SP were separated by thin-layer chromatography (TLC). The results revealed that, all bulls had normal semen characteristics and TP concentration in SP ranged from 7.0 to 10.4 g/dL except bull No. 6 had a relatively low concentration of 4.9 to 6.8 g/dL. Neither proteins nor lipids species were different between raw and desalted SP. Seventeen proteins were detected ranging from 8.5 to 185.8 kDa, and those of 12, 13.5, 15, 21, 23 and 38 kDa were predominant. Notably, proteins of 10, 17.5, 19, 21, 80 and 185.8 kDa might be new candidates of SP proteins (SPPs). The detected neutral lipid spots corresponded to cholesterol, 1,2-dimyristoyl glycerol, 1,2-dioleoyloglycerol, 1,3-dimyristoyl glycerol and 1,3-dioleoyloglycerol. The detected phospholipids spots corresponded to non-migrating phospholipids, sphingomyelin (SM), phosphatidylcholine (PC), phosphatidylserine (PS), phosphatidylinositol (PI), phosphatidylethanolamine (PE), cerebroside and polyglycerol phosphatide. Cholesterol represents the major molecule of neutral lipids, whereas SM, PC, PI and PE represent the major phospholipids. Noteworthy, there were 2 species of diacylglycerol (DAG) and 3 species of PI in bovine SP. In conclusion, this study gave a general picture of SP protein and lipid species in fertile bull semen, which might serve as fundamental knowledge for either semen analysis or prediction of male fertility.
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9
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Cyclodextrins or cholesterol-loaded-cyclodextrins? A better choice for improved cryosurvival of chicken spermatozoa. Anim Reprod Sci 2018; 193:235-244. [PMID: 29699918 DOI: 10.1016/j.anireprosci.2018.04.076] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/06/2018] [Accepted: 04/17/2018] [Indexed: 11/21/2022]
Abstract
This study was designed to test if treating chicken sperm with i) the cyclodextrins 2-hydroxypropyl-β-cyclodextrin (HBCD) and methyl-β-cyclodextrin (MBCD) alone improve fresh, liquid-stored and cryopreserved semen quality, or ii) cholesterol-loaded cyclodextrins (CLCs): 2-hydroxypropyl-β-cyclodextrin loaded with cholesterol (HCLC) and methyl-β-cyclodextrin loaded with cholesterol (MCLC) enhance chicken semen quality for application to assisted reproductive technologies. Three consecutive experiments were performed with different concentrations of additives: Exp. 1: 1, 2, 4 mg of HBCD and MBCD in fresh and liquid stored semen; Exp. 2: 1, 2, 4 mg of HCLC and MCLC in fresh and liquid stored semen; and Exp. 3: 1, 2 mg of HBCD, HCLC, 1 mg MBCD, MCLC in cryopreserved and post-thaw storage semen. Sperm motility parameters were assessed by CASA system and comprehensive sperm characteristics were evaluated by flow cytometry. Supplementation with 4 mg HBCD, MBCD, HCLC and MCLC resulted in the lowest motility and functional parameters of fresh and stored spermatozoa for 24 h at 5 °C. After cryopreservation, spermatozoa stored with CLCs showed significantly lower progressive motility and velocity of movement, and exhibited the lowest percentage of cells with intact plasma membranes and acrosomes, mitochondrial activity and cells without apoptosis. These results indicated that CLCs did not improve chicken sperm viability after cryopreservation. However, spermatozoa treated with 2 mg HBCD showed higher proportion of motile sperm (28%; P < 0.01) together with higher proportion of sperm cells with high mitochondrial potential (25%; P < 0.05) compared to the control (18%; 21%, respectively) after 3 h of post-thaw storage. CLC, especially with methyl-β-cyclodextrin, appeared to be detrimental to chicken spermatozoa, causing apoptosis, impairment of mitochondrial potential, and damaged acrosomes and sperm plasma membranes.
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10
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Tumor cell cholesterol depletion and V-ATPase inhibition as an inhibitory mechanism to prevent cell migration and invasiveness in melanoma. Biochim Biophys Acta Gen Subj 2017; 1862:684-691. [PMID: 29253593 DOI: 10.1016/j.bbagen.2017.12.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/18/2017] [Accepted: 12/13/2017] [Indexed: 01/01/2023]
Abstract
BACKGROUND V-ATPase interactions with cholesterol enriched membrane microdomains have been related to metastasis in a variety of cancers, but the underlying mechanism remains at its beginnings. It has recently been reported that the inhibition of this H+ pump affects cholesterol mobilization to the plasma membrane. METHODS Inhibition of melanoma cell migration and invasiveness was assessed by wound healing and Transwell assays in murine cell lines (B16F10 and Melan-A). V-ATPase activity was measured in vitro by ATP hydrolysis and H+ transport in membrane vesicles, and intact cell H+ fluxes were measured by using a non-invasive Scanning Ion-selective Electrode Technique (SIET). RESULTS Cholesterol depletion by 5mM MβCD was found to be inhibitory to the hydrolytic and H+ pumping activities of the V-ATPase of melanoma cell lines, as well as to the migration and invasiveness capacities of these cells. Nearly the same effects were obtained using concanamycin A, a specific inhibitor of V-ATPase, which also promoted a decrease of the H+ efflux in live cells at the same extent of MβCD. CONCLUSIONS We found that cholesterol depletion significantly affects the V-ATPase activity and the initial metastatic processes following a profile similar to those observed in the presence of the V-ATPase specific inhibitor, concanamycin. GENERAL SIGNIFICANCE The results shed new light on the functional role of the interactions between V-ATPases and cholesterol-enriched microdomains of cell membranes that contribute with malignant phenotypes in melanoma.
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11
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Gadella BM. Reproductive tract modifications of the boar sperm surface. Mol Reprod Dev 2017; 84:822-831. [PMID: 28452082 DOI: 10.1002/mrd.22821] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 04/10/2017] [Accepted: 04/19/2017] [Indexed: 01/25/2023]
Abstract
The sperm cell has a unique, polarized, and segregated surface that is modified extensively by the changing environments in both the male and the female reproductive tracts. The sperm cannot refresh its surface, as protein translation and membrane recycling by intracellular vesicular transport have ceased upon its maturation. So, how is the sperm surface modified in the reproductive tracts and how do these processes affect fertilization? This review traces these modifications as boar sperm travels from their liberation from the Sertoli cell into the lumen of seminiferous tubules of the testis to the site of fertilization in the ampulla of the oviduct in the sow, via an artificial insemination route. The effect of sperm dilution for artificial insemination, as well as more extensive sperm processing for in vitro fertilization, cryopreservation, or sex sorting, are also discussed with respect to how these procedures affect sperm surface organization and fertilization capacity.
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Affiliation(s)
- Bart M Gadella
- Faculty of Veterinary Medicine, Department of Farm Animal Health and Biochemistry and Cell Biology, Utrecht University, Utrecht, The Netherlands
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12
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Águila L, Zambrano F, Arias ME, Felmer R. Sperm capacitation pretreatment positively impacts bovine intracytoplasmic sperm injection. Mol Reprod Dev 2017; 84:649-659. [PMID: 28513911 DOI: 10.1002/mrd.22834] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 05/02/2017] [Accepted: 05/11/2017] [Indexed: 11/08/2022]
Abstract
The efficiency of intracytoplasmic sperm injection (ICSI) in bovines is low compared to other species due in part to inadequate egg activation and sperm nucleus decondensation after injection. We hypothesized that this low efficiency is due to the lack of complete sperm capacitation, so we evaluated the effects of isobutylmethylxanthine (IBMX) and methyl-β-cyclodextrin (MβCD) on bovine sperm capacitation and on the preimplantation developmental potential of bovine embryos generated by ICSI. Treatment with IBMX and MβCD decreased sperm viability (between 13-30%); nevertheless, 0.4 mM IBMX and 1 mM MβCD increased (p < 0.05) capacitation metrics-that is, acrosome exocytosis, intracellular calcium level, plasma membrane fluidity, and tyrosine phosphorylation-compared to the control. After ICSI, embryos injected with IBMX- and MβCD-treated sperm showed similar cleavage to the untreated group (range 82-88%). Pronucleus formation rate was higher with MβCD-pretreatment (54%) compared to the control group (25%), and blastocyst rate was significantly improved with MβCD-pretreatment (24%) compared to the IBMX (18%) and control (17%) groups. Importantly, embryo quality-as assessed by the total number of cells, cell allocation, and apoptotic cell index-was not affected by the sperm treatments. In conclusion, MβCD pretreatment of sperm improved the efficiency of blastocyst production in bovine ICSI.
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Affiliation(s)
- Luis Águila
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - Fabiola Zambrano
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - Maria E Arias
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile.,Faculty of Agriculture and Forestry Sciences, Department of Agricultural Sciences and Natural Resources, Universidad de La Frontera, Temuco, Chile
| | - Ricardo Felmer
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile.,Faculty of Agriculture and Forestry Sciences, Department of Agricultural Sciences and Natural Resources, Universidad de La Frontera, Temuco, Chile
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Yoshimoto H, Takeo T, Irie T, Nakagata N. Fertility of cold-stored mouse sperm is recovered by promoting acrosome reaction and hyperactivation after cholesterol efflux by methyl-beta-cyclodextrin. Biol Reprod 2017; 96:446-455. [DOI: 10.1095/biolreprod.116.142901] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 12/24/2016] [Accepted: 01/04/2017] [Indexed: 12/17/2022] Open
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Leahy T, Gadella BM. New insights into the regulation of cholesterol efflux from the sperm membrane. Asian J Androl 2016; 17:561-7. [PMID: 25926609 PMCID: PMC4492045 DOI: 10.4103/1008-682x.153309] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Cholesterol is an essential component of the mammalian plasma membrane because it promotes membrane stability without comprising membrane fluidity. Given this important cellular role, cholesterol levels are tightly controlled at multiple levels. It has been clearly shown that cholesterol redistribution and depletion from the sperm membrane is a key part of the spermatozoon's preparation for fertilization. Some factors that regulate these events are described (e.g., bicarbonate, calcium) but the mechanisms underlying cholesterol export are poorly understood. How does a hydrophobic cholesterol molecule inserted in the sperm plasma membrane enter the energetically unfavorable aqueous surroundings? This review will provide an overview of knowledge in this area and highlight our gaps in understanding. The overall aim is to better understand cholesterol redistribution in the sperm plasma membrane, its relation to the possible activation of a cholesterol transporter and the role of cholesterol acceptors. Armed with such knowledge, sperm handling techniques can be adapted to better prepare spermatozoa for in vitro and in vivo fertilization.
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Affiliation(s)
| | - Bart M Gadella
- Department of Farm Animal Health and of Biochemistry and Cell Biology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands
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Águila L, Arias ME, Vargas T, Zambrano F, Felmer R. Methyl-β-Cyclodextrin Improves Sperm Capacitation Status Assessed by Flow Cytometry Analysis and Zona Pellucida-Binding Ability of Frozen/Thawed Bovine Spermatozoa. Reprod Domest Anim 2015; 50:931-8. [DOI: 10.1111/rda.12611] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 08/20/2015] [Indexed: 11/28/2022]
Affiliation(s)
- L Águila
- Laboratory of Reproduction; Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
| | - ME Arias
- Laboratory of Reproduction; Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
| | - T Vargas
- Laboratory of Reproduction; Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
| | - F Zambrano
- Laboratory of Reproduction; Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
| | - R Felmer
- Laboratory of Reproduction; Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
- Department of Agricultural Sciences and Natural Resources; Faculty of Agriculture and Forestry; Universidad de La Frontera; Temuco Chile
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16
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van Gestel RA, Brouwers JF, Ultee A, Helms JB, Gadella BM. Ultrastructure and lipid composition of detergent-resistant membranes derived from mammalian sperm and two types of epithelial cells. Cell Tissue Res 2015; 363:129-145. [PMID: 26378009 PMCID: PMC4700079 DOI: 10.1007/s00441-015-2272-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 08/06/2015] [Indexed: 01/13/2023]
Abstract
Lipid rafts are micro-domains of ordered lipids (Lo phase) in biological membranes. The Lo phase of cellular membranes can be isolated from disordered lipids (Ld phase) after treatment with 1 % Triton X-100 at 4 °C in which the Lo phase forms the detergent-resistant membrane (DRM) fraction. The lipid composition of DRM derived from Madin-Darby canine kidney (MDCK) cells, McArdle cells and porcine sperm is compared with that of the whole cell. Remarkably, the unsaturation and chain length degree of aliphatic chains attached to phospholipids is virtually the same between DRM and whole cells. Cholesterol and sphingomyelin were enriched in DRMs but to a cell-specific molar ratio. Sulfatides (sphingolipids from MDCK cells) were enriched in the DRM while a seminolipid (an alkylacylglycerolipid from sperm) was depleted from the DRM. Treatment with <5 mM methyl-ß-cyclodextrin (MBCD) caused cholesterol removal from the DRM without affecting the composition and amount of the phospholipid while higher levels disrupted the DRM. The substantial amount of (poly)unsaturated phospholipids in DRMs as well as a low stoichiometric amount of cholesterol suggest that lipid rafts in biological membranes are more fluid and dynamic than previously anticipated. Using negative staining, ultrastructural features of DRM were monitored and in all three cell types the DRMs appeared as multi-lamellar vesicular structures with a similar morphology. The detergent resistance is a result of protein–cholesterol and sphingolipid interactions allowing a relatively passive attraction of phospholipids to maintain the Lo phase. For this special issue, the relevance of our findings is discussed in a sperm physiological context.
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Affiliation(s)
- Renske A van Gestel
- Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - Jos F Brouwers
- Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - Anton Ultee
- Department of Pathology, Faculty of Veterinary Medicine Utrecht University, Utrecht, The Netherlands
| | - J Bernd Helms
- Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - Bart M Gadella
- Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands.
- Department of Farm Animal Health, Faculty of Veterinary Medicine Utrecht University, Utrecht, The Netherlands.
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17
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Gadella BM, Boerke A. An update on post-ejaculatory remodeling of the sperm surface before mammalian fertilization. Theriogenology 2015; 85:113-24. [PMID: 26320574 DOI: 10.1016/j.theriogenology.2015.07.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/07/2015] [Accepted: 07/12/2015] [Indexed: 11/17/2022]
Abstract
The fusion of a sperm with an oocyte to form new life is a highly regulated event. The activation-also termed capacitation-of the sperm cell is one of the key preparative steps required for this process. Ejaculated sperm has to make a journey through the female uterus and oviduct before it can approach the oocyte. The oocyte at that moment also has become prepared to facilitate monospermic fertilization and block immediately thereafter the chance for polyspermic fertilization. Interestingly, ejaculated sperm is not properly capacitated and consequently is not yet able to fertilize the oocyte. During the capacitation process, the formation of competent lipid-protein domains on the sperm head enables sperm-cumulus and zona pellucida interactions. This sperm binding allows the onset for a cascade reaction ultimately resulting in oocyte-sperm fusion. Many different lipids and proteins from the sperm surface are involved in this process. Sperm surface processing already starts when sperm are liberated from the seminiferous tubules and is followed by epididymal maturation where the sperm cell surface is modified and loaded with proteins to ensure it is prepared for its fertilization task. Although cauda epididymal sperm can fertilize the oocyte IVF, they are coated with so-called decapacitation factors during ejaculation. The seminal plasma-induced stabilization of the sperm surface permits the sperm transit through the cervix and uterus but prevents sperm capacitation and thus inhibits fertilization. For IVF purposes, sperm are washed out of seminal plasma and activated to get rid of decapacitation factors. Only after capacitation, the sperm can fertilize the oocyte. In recent years, IVF has become a widely used tool to achieve successful fertilization in both the veterinary field and human medicine. Although IVF procedures are very successful, scientific knowledge is still far from complete when identifying all the molecular players and processes during the first stages the fusion of two gametes into a new life. A concise overview in the current understanding of the process of capacitation and the sperm surface changes is provided. The gaps in knowledge of these prefertilization processes are critically discussed.
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Affiliation(s)
- B M Gadella
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, The Netherlands; Department of Biochemistry & Cell Biology, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
| | - A Boerke
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, The Netherlands; Department of Biochemistry & Cell Biology, Faculty of Veterinary Medicine, Utrecht University, The Netherlands
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19
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Zhao X, Zhang X, Qu Y, Li R, Baluška F, Wan Y. Mapping of Membrane Lipid Order in Root Apex Zones of Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2015; 6:1151. [PMID: 26734047 PMCID: PMC4685293 DOI: 10.3389/fpls.2015.01151] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 12/04/2015] [Indexed: 05/18/2023]
Abstract
In this study, we used the fluorescence probe, Di-4-ANEPPDHQ, to map the distribution of membrane lipid order in the apical region of Arabidopsis roots. The generalized polarization (GP) value of Di-4-ANEPPDHQ-stained roots indicated the highest lipid order in the root transition zone (RTZ). The cortical cells have higher lipid order than the epidermal cells in same regions, while the developing root hairs show very prominent cell polarity with high lipid order in apical region. Moreover, the endosomes had lower lipid order than that of the plasma membrane (PM). Brefeldin A (BFA) treatment decreased the lipid order in both the plasma and endosomal membranes of epidermal cells in the RTZ. The lipid order of BFA-induced compartments became higher than that of the PM after BFA treatment in epidermal cells. Meanwhile, the polarly growing tips of root hairs did not show the same behavior. The lipid order of the PM remained unchanged, with higher values than that of the endosomes. This suggests that the lipid ordering in the PM was affected by recycling of endosomal vesicles in epidermal cells of the root apex transition zone but not in the root hairs of Arabidopsis.
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Affiliation(s)
- Xiaoyu Zhao
- College of Biological Sciences and Biotechnology, Beijing Forestry UniversityBeijing, China
| | - Xiran Zhang
- College of Biological Sciences and Biotechnology, Beijing Forestry UniversityBeijing, China
| | - Yanli Qu
- College of Biological Sciences and Biotechnology, Beijing Forestry UniversityBeijing, China
| | - Ruili Li
- College of Biological Sciences and Biotechnology, Beijing Forestry UniversityBeijing, China
| | - František Baluška
- Institute of Cellular and Molecular Botany, University of BonnBonn, Germany
| | - Yinglang Wan
- College of Biological Sciences and Biotechnology, Beijing Forestry UniversityBeijing, China
- *Correspondence: Yinglang Wan,
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20
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Harayama H. Roles of intracellular cyclic AMP signal transduction in the capacitation and subsequent hyperactivation of mouse and boar spermatozoa. J Reprod Dev 2014; 59:421-30. [PMID: 24162806 PMCID: PMC3934125 DOI: 10.1262/jrd.2013-056] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
It is not until accomplishment of a variety of molecular changes during the transit
through the female reproductive tract that mammalian spermatozoa are capable of
exhibiting highly activated motility with asymmetric whiplash beating of the flagella
(hyperactivation) and undergoing acrosomal exocytosis in the head (acrosome
reaction). These molecular changes of the spermatozoa are collectively termed
capacitation and promoted by bicarbonate, calcium and cholesterol acceptors. Such
capacitation-promoting factors can stimulate intracellular cyclic AMP (cAMP) signal
transduction in the spermatozoa. Meanwhile, hyperactivation and the acrosome reaction
are essential to sperm fertilization with oocytes and are apparently triggered by a
sufficient increase of intracellular Ca2+ in the sperm flagellum and head,
respectively. Thus, it is necessary to investigate the relationship between cAMP
signal transduction and calcium signaling cascades in the spermatozoa for the purpose
of understanding the molecular basis of capacitation. In this review, I cover updated
insights regarding intracellular cAMP signal transduction, the acrosome reaction and
flagellar motility in mammalian spermatozoa and then account for possible roles of
intracellular cAMP signal transduction in the capacitation and subsequent
hyperactivation of mouse and boar spermatozoa.
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Affiliation(s)
- Hiroshi Harayama
- Laboratory of Reproductive Biology, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
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21
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Blanch E, Tomás C, Hernández M, Roca J, Martínez EA, Vázquez JM, Mocé E. Egg yolk and glycerol requirements for freezing boar spermatozoa treated with methyl β-cyclodextrin or cholesterol-loaded cyclodextrin. J Reprod Dev 2014; 60:143-9. [PMID: 24492655 PMCID: PMC3999393 DOI: 10.1262/jrd.2013-073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Egg yolk (EY) and glycerol are common constituents of extenders used for sperm
cryopreservation. It has been demonstrated that using cholesterol-loaded cyclodextrins
(CLC) improves sperm cryosurvival in several species. However, standard freezing extenders
might not be the most appropriate for CLC-treated sperm. This study evaluated the EY and
glycerol requirements for freezing CLC-treated boar spermatozoa. Semen samples from 34
ejaculates coming from 4 boars were used. Each ejaculate was split into three aliquots:
one was used untreated (control), and the other two were treated with 1 mg of CLC or
methyl-β-cyclodextrin/120 × 106 sperm for 15 min at 22 C prior to
cryopreservation. Our results indicated that reducing the concentration of EY was
detrimental for sperm viability after thawing (31.57 ± 2 vs. 19.89% ± 2
for 20 and 10% EY, respectively; P <0.05), even in semen treated with CLC. On the other
hand, it was observed that the traditional concentration of glycerol (3%) was not the
appropriate for freezing CLC-treated sperm (61.10 ± 3 vs. 47.87% ± 3 viable sperm for
control and CLC-treated sperm, respectively; P <0.05). Thus, CLC-treated sperm showed a
higher tolerance to high glycerol concentrations (5%) in terms of sperm viability (59.19%
± 3) than non-treated sperm (45.58% ± 3; P<0.05). Therefore, it could be necessary to
modify the freezing extenders for CLC-treated sperm. Nevertheless, additional studies will
be needed to evaluate alternative cryoprotectants and to determine the effect of high
glycerol concentrations on sperm functionality.
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Affiliation(s)
- Eva Blanch
- Centro de Tecnología Animal - Instituto Valenciano de Investigaciones Agrarias (CITA-IVIA), 12400-Segorbe (Castellón), Spain
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Bromfield EG, Aitken RJ, Gibb Z, Lambourne SR, Nixon B. Capacitation in the presence of methyl-β-cyclodextrin results in enhanced zona pellucida-binding ability of stallion spermatozoa. Reproduction 2014; 147:153-66. [DOI: 10.1530/rep-13-0393] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
While IVF has been widely successful in many domesticated species, the development of a robust IVF system for the horse remains an elusive and highly valued goal. A major impediment to the development of equine IVF is the fact that optimised conditions for the capacitation of equine spermatozoa are yet to be developed. Conversely, it is known that stallion spermatozoa are particularly susceptible to damage arising as a consequence of capacitation-like changes induced prematurely in response to semen handling and transport conditions. To address these limitations, this study sought to develop an effective system to both suppress and promote thein vitrocapacitation of stallion spermatozoa. Our data indicated that the latter could be achieved in a bicarbonate-rich medium supplemented with a phosphodiesterase inhibitor, a cyclic AMP analogue, and methyl-β-cyclodextrin, an efficient cholesterol-withdrawing agent. The populations of spermatozoa generated under these conditions displayed a number of hallmarks of capacitation, including elevated levels of tyrosine phosphorylation, a reorganisation of the plasma membrane leading to lipid raft coalescence in the peri-acrosomal region of the sperm head, and a dramatic increase in their ability to interact with heterologous bovine zona pellucida (ZP) and undergo agonist-induced acrosomal exocytosis. Furthermore, this functional transformation was effectively suppressed in media devoid of bicarbonate. Collectively, these results highlight the importance of efficient cholesterol removal in priming stallion spermatozoa for ZP bindingin vitro.
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Gadella BM, Luna C. Cell biology and functional dynamics of the mammalian sperm surface. Theriogenology 2014; 81:74-84. [DOI: 10.1016/j.theriogenology.2013.09.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 09/07/2013] [Accepted: 09/08/2013] [Indexed: 12/11/2022]
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Variation in lipid profiles within semen compartments—the bovine model of aging. Theriogenology 2013; 80:712-21. [DOI: 10.1016/j.theriogenology.2013.05.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 05/24/2013] [Accepted: 05/26/2013] [Indexed: 01/04/2023]
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Boerke A, Brouwers JF, Olkkonen VM, van de Lest CH, Sostaric E, Schoevers EJ, Helms JB, Gadella BM. Involvement of Bicarbonate-Induced Radical Signaling in Oxysterol Formation and Sterol Depletion of Capacitating Mammalian Sperm During In Vitro Fertilization1. Biol Reprod 2013; 88:21. [DOI: 10.1095/biolreprod.112.101253] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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Oddi S, Bernabò N, Di Tommaso M, Angelucci CB, Bisicchia E, Mattioli M, Maccarrone M. DNA uptake in swine sperm: Effect of plasmid topology and methyl-beta-cyclodextrin-mediated cholesterol depletion. Mol Reprod Dev 2012; 79:853-60. [DOI: 10.1002/mrd.22124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 10/08/2012] [Indexed: 11/09/2022]
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Emara M, Royer PJ, Mahdavi J, Shakib F, Ghaemmaghami AM. Retagging identifies dendritic cell-specific intercellular adhesion molecule-3 (ICAM3)-grabbing non-integrin (DC-SIGN) protein as a novel receptor for a major allergen from house dust mite. J Biol Chem 2011; 287:5756-63. [PMID: 22205703 PMCID: PMC3285347 DOI: 10.1074/jbc.m111.312520] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Dendritic cells (DCs) have been shown to play a key role in the initiation and maintenance of immune responses to microbial pathogens as well as to allergens, but the exact mechanisms of their involvement in allergic responses and Th2 cell differentiation have remained elusive. Using retagging, we identified DC-SIGN as a novel receptor involved in the initial recognition and uptake of the major house dust mite and dog allergens Der p 1 and Can f 1, respectively. To confirm this, we used gene silencing to specifically inhibit DC-SIGN expression by DCs followed by allergen uptake studies. Binding and uptake of Der p 1 and Can f 1 allergens was assessed by ELISA and flow cytometry. Intriguingly, our data showed that silencing DC-SIGN on DCs promotes a Th2 phenotype in DC/T cell co-cultures. These findings should lead to better understanding of the molecular basis of allergen-induced Th2 cell polarization and in doing so paves the way for the rational design of novel intervention strategies by targeting allergen receptors on innate immune cells or their carbohydrate counterstructures on allergens.
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Affiliation(s)
- Mohamed Emara
- School of Molecular Medical Sciences, Queen's Medical Centre, The University of Nottingham, Nottingham NG7 2UH, United Kingdom
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Leahy T, Gadella BM. Sperm surface changes and physiological consequences induced by sperm handling and storage. Reproduction 2011; 142:759-78. [DOI: 10.1530/rep-11-0310] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Spermatozoa interact with their immediate environment and this contact remodels the sperm surface in preparation for fertilisation. These fundamental membrane changes will be critically covered in this review with special emphasis on the very specific surface destabilisation event, capacitation. This process involves very subtle and intricate modifications of the sperm membrane including removal of suppression (decapacitation) factors and changes in the lateral organisation of the proteins and lipids of the sperm surface. Processing of sperm for assisted reproduction (storage, sex-sorting, etc.) subjects spermatozoa to numerous stressors, and it is possible that this processing overrides such delicate processes resulting in sperm instability and cell damage. To improve sperm quality, novel mechanisms must be used to stabilise the sperm surface during handling. In this review, different types of membrane stress are considered, as well as novel surface manipulation methods to improve sperm stability.
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Brouwers JF, Boerke A, Silva PFN, Garcia-Gil N, van Gestel RA, Helms JB, van de Lest CHA, Gadella BM. Mass spectrometric detection of cholesterol oxidation in bovine sperm. Biol Reprod 2011; 85:128-36. [PMID: 21415139 DOI: 10.1095/biolreprod.111.091207] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
We report on the presence and formation of cholesterol oxidation products (oxysterols) in bovine sperm. Although cholesterol is the most abundant molecule in the membrane of mammalian cells and is easily oxidized, this is the first report on cholesterol oxidation in sperm membranes as investigated by state-of-the-art liquid chromatographic and mass spectrometric methods. First, oxysterols are already present in fresh semen samples, showing that lipid peroxidation is part of normal sperm physiology. After chromatographic separation (by high-performance liquid chromatography), the detected oxysterol species were identified with atmospheric pressure chemical ionization mass spectrometry in multiple-reaction-monitoring mode that enabled detection in a broad and linear concentration range (0.05-100 pmol for each oxysterol species detected). Second, exposure of living sperm cells to oxidative stress does not result in the same level and composition of oxysterol species compared with oxidative stress imposed on reconstituted vesicles from protein-free sperm lipid extracts. This suggests that living sperm cells protect themselves against elevated oxysterol formation. Third, sperm capacitation induces the formation of oxysterols, and these formed oxysterols are almost completely depleted from the sperm surface by albumin. Fourth, and most importantly, capacitation after freezing/thawing of sperm fails to induce both the formation of oxysterols and the subsequent albumin-dependent depletion of oxysterols from the sperm surface. The possible physiological relevance of capacitation-dependent oxysterol formation and depletion at the sperm surface as well as the omission of this after freezing/thawing semen is discussed.
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Affiliation(s)
- Jos F Brouwers
- Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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Kawano N, Yoshida K, Miyado K, Yoshida M. Lipid rafts: keys to sperm maturation, fertilization, and early embryogenesis. J Lipids 2011; 2011:264706. [PMID: 21490798 PMCID: PMC3068481 DOI: 10.1155/2011/264706] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 11/17/2010] [Accepted: 12/17/2010] [Indexed: 12/18/2022] Open
Abstract
Cell membranes are composed of many different lipids and protein receptors, which are important for regulating intracellular functions and cell signaling. To orchestrate these activities, the cell membrane is compartmentalized into microdomains that are stably or transiently formed. These compartments are called "lipid rafts". In gamete cells that lack gene transcription, distribution of lipids and proteins on these lipid rafts is focused during changes in their structure and functions such as starting flagella movement and membrane fusion. In this paper, we describe the role of lipid rafts in gamete maturation, fertilization, and early embryogenesis.
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Affiliation(s)
- Natsuko Kawano
- Division of Gamete and Reproductive Biology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya, Tokyo 157-8535, Japan
| | - Kaoru Yoshida
- Biomedical Engineering Center, Toin University of Yokohama, Yokohama 225-8502, Japan
| | - Kenji Miyado
- Division of Gamete and Reproductive Biology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya, Tokyo 157-8535, Japan
| | - Manabu Yoshida
- Misaki Marine Biological Station, Graduate School of Science, University of Tokyo, Miura, Kanagawa 238-0225, Japan
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Miranda PV, Allaire A, Sosnik J, Visconti PE. Localization of low-density detergent-resistant membrane proteins in intact and acrosome-reacted mouse sperm. Biol Reprod 2009; 80:897-904. [PMID: 19144954 PMCID: PMC2804839 DOI: 10.1095/biolreprod.108.075242] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Mammalian sperm become fertile after completing capacitation, a process associated with cholesterol loss and changes in the biophysical properties of the sperm membranes that prepares the sperm to undergo the acrosome reaction. Different laboratories have hypothesized that cholesterol efflux can influence the extent and/or movement of lipid raft microdomains. In a previous study, our laboratory investigated the identity of sperm proteins putatively associated with rafts. After extraction with Triton X-100 and ultracentrifugation in sucrose gradients, proteins distributing to the light buoyant-density fractions were cored from polyacrylamide gels and microsequenced. In this study, a subset of these proteins (TEX101, basigin, hexokinase 1, facilitated glucose transporter 3, IZUMO, and SPAM1) and other molecules known to be enriched in membrane rafts (caveolin 2, flotillin 1, flotillin 2, and the ganglioside GM3) were selected to investigate their localization in the sperm and their behavior during capacitation and the acrosome reaction. These molecules localize to multiple sperm domains, including the acrosomal cap (IZUMO, caveolin 2, and flotillin 2), equatorial segment (GM3), cytoplasmic droplet (TEX101), midpiece (basigin, facilitated glucose transporter 3, and flotillin 2), and principal piece (facilitated glucose transporter 3). Some of these markers modified their immunofluorescence pattern after sperm incubation under capacitating conditions, and these changes correlated with the occurrence of the acrosome reaction. While GM3 and caveolin 2 were not detected after the acrosome reaction, flotillin 2 was found in the equatorial segment of acrosome-reacted sperm, and IZUMO distributed along the sperm head, reaching the post- and para-acrosomal areas. Taking into consideration the requirement of the acrosome reaction for sperm to become fusogenic, these results suggest that membrane raft dynamics may have a role in sperm-egg membrane interaction.
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Affiliation(s)
- Patricia V Miranda
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, MA, USA
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Capacitation-dependent reorganization of microdomains in the apical sperm head plasma membrane: Functional relationship with zona binding and the zona-induced acrosome reaction. Theriogenology 2008; 70:1188-96. [DOI: 10.1016/j.theriogenology.2008.06.021] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Companyó M, Iborra A, Villaverde J, Martínez P, Morros A. Membrane fluidity changes in goat sperm induced by cholesterol depletion using beta-cyclodextrin. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1768:2246-55. [PMID: 17669356 DOI: 10.1016/j.bbamem.2007.06.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Revised: 06/12/2007] [Accepted: 06/12/2007] [Indexed: 11/24/2022]
Abstract
Cholesterol efflux from membranes promotes acrosome reaction in goat spermatozoa. In 1 h of incubation of sperm in the presence of beta-cyclodextrin (beta CD), all the interchangeable cholesterol is desorbed from sperm membranes, although acrosome reaction is fully accomplished only after 3-4 h of incubation, as previously published. In the present paper we investigate the effect of cholesterol removal from mature goat spermatozoa on the overall membrane "fluidity" of live cell membranes and of liposomes from sperm lipid extracts. Using steady state fluorescence anisotropy of 1,6-diphenyl-1,3,5-hexatriene (DPH), we studied the average thermotropic behaviour of membrane lipids, after incubation of live sperm for 1 h in BSA-free medium with the presence/absence of 8 mM beta-cyclodextrin, as a cholesterol acceptor. Unimodal and bimodal theoretical sigmoids fitted best to the experimental thermotropic profiles of liposomes and whole cells, respectively. In the case of whole sperm, two phase transitions, attributable to different lipid domains, were clearly separated by using the fitting parameters. After cholesterol removal, important changes in the relative anisotropy range of the two transitions were found, indicating an increase in the "fluidity" of some of the lipid microdomains of sperm membranes. These changes in sperm lipid dynamics are produced before the onset of sperm acrosome reaction.
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Affiliation(s)
- Mònica Companyó
- Unitat de Biofísica, Departament de Bioquímica i de Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
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Vadnais ML, Galantino-Homer HL, Althouse GC. Current concepts of molecular events during bovine and porcine spermatozoa capacitation. ACTA ACUST UNITED AC 2007; 53:109-23. [PMID: 17612869 DOI: 10.1080/01485010701329386] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Spermatozoa are required to undergo the processes of capacitation before they obtain fertilizing ability. The molecular changes of capacitation are still not fully understood. However, it is accepted that capacitation is a sequential process involving numerous physiological changes including destabilization of the plasma membrane, alterations of intracellular ion concentrations and membrane potential, and protein phosphorylation. There are no known morphological changes that occur to the spermatozoon during capacitation. The purpose of this review is to summarize current evidence on the molecular aspects of capacitation both in vivo and in vitro in bovine and porcine spermatozoa. For the purpose of this review, the process of sperm capacitation will encompass maturational events that occur following ejaculation up to binding to the zona pellucida, that triggers acrosomal exocytosis and initiates fertilization.
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Affiliation(s)
- Melissa L Vadnais
- Department of Urologic Surgery, University of Minnesota, Minneapolis, MN, USA
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Galantino-Homer HL, Zeng WX, Megee SO, Dallmeyer M, Voelkl D, Dobrinski I. Effects of 2-hydroxypropyl-β-cyclodextrin and cholesterol on porcine sperm viability and capacitation status following cold shock or incubation. Mol Reprod Dev 2006; 73:638-50. [PMID: 16450405 DOI: 10.1002/mrd.20437] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Porcine sperm are extremely sensitive to the damaging effects of cold shock. It has been shown that cholesterol-binding molecules, such as 2-hydroxypropyl-beta-cyclodextrin (HBCD), improve post-cooling porcine sperm viability when added to an egg yolk-based extender, but also enhance sperm capacitation in other species. The objective of this study was to determine the effects of HBCD and cholesterol 3-sulfate (ChS) on porcine sperm viability and capacitation following cold shock or incubation under conditions that support capacitation using a defined medium. We report here that porcine sperm incubated in medium containing both HBCD and ChS have significantly improved viability following cold shock (10 min at 10 degrees C) when compared to sperm incubated without HBCD or ChS, or with either component alone. Treatment with HBCD plus ChS also completely inhibited the increase in protein tyrosine phosphorylation induced by the cold shock treatment or by incubation for 3 hr under conditions that support capacitation. Two assays of sperm capacitation, the rate of calcium ionophore-induced acrosome reactions and chlortetracycline (CTC) staining, were not significantly altered by HBCD and ChS following cold shock. However, 3-hr incubation with HBCD plus ChS or with 1 mM ChS alone decreased the percentage of sperm undergoing the induced acrosome reaction without significantly affecting viability when compared to the control. These results indicate that the manipulation of sperm plasma membrane cholesterol content affects porcine sperm viability and capacitation status and could therefore be useful to protect sperm from cold shock during cryopreservation by improving viability without promoting premature capacitation.
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Affiliation(s)
- Hannah L Galantino-Homer
- Department of Clinical Studies, Center for Animal Transgenesis and Germ Cell Research, New Bolton Center, University of Pennsylvania School of Veterinary Medicine, Kennett Square, Pennsylvania, USA
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