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Blawut B, Wolfe B, Premanandan C, Schuenemann G, Ludsin SA, Liu SL, Veeramachaneni DNR, Coutinho da Silva MA. Effects of activation and assisted reproduction techniques on the composition, structure, and properties of the sauger (Sander Canadensis) spermatozoa plasma membrane. Theriogenology 2023; 198:87-99. [PMID: 36566603 DOI: 10.1016/j.theriogenology.2022.12.021] [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: 07/27/2022] [Revised: 12/10/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
The sperm plasma membrane is a multifunctional organelle essential to fertilization. However, assisted reproduction techniques often negatively affect this structure, resulting in reduced fertility. These reductions have been attributed to plasma membrane damage in a wide array of species, including fish. Considerable research has been conducted on the fish sperm membrane, but few have examined the effect of cryopreservation and other assisted reproduction techniques (ARTs) on not only membrane composition, but also specific characteristics (e.g., fluidity) and organization (e.g., lipid rafts). Herein, we determined the effects of three ARTs (testicular harvest, strip spawning, and cryopreservation) on the sperm plasma membrane, using Sauger (Sander canadensis) sperm as a model. To this end, a combination of fluorescent dyes (e.g., merocyanine 540, filipin III, cholera toxin subunit β), liquid chromatography - mass spectroscopy (LC-MS) analysis of membrane lipids, and membrane ultracentrifugation coupled with plate assays and immunofluorescence were used to describe and compare sperm fluidity, membrane composition, as well as lipid raft composition and distribution among sperm types. Stripped sperm became more fluid following motility activation (40% increase in highly fluid cells characterized by a 2 × increase in fluorescence) and contained lipid rafts restricted to the midpiece. Testicular harvest yielded sperm with characteristics similar to stripped sperm. By contrast, cryopreservation impacted every aspect of membrane physiology. Two cell populations, one highly fluid and the other rigid, resulted from the freeze-thaw process. Cryopreservation reduced lipid raft cholesterol content by 44% and flotilin-2 (a lipid raft marker) was partially displaced owing to a decrease in buoyancy. Unlike stripped and testicular sperm, LC-MS analysis revealed increases in oxidative damage markers, membrane destabilization, and apoptotic signaling in cryopreserved sperm. Ultrastructural analysis also revealed widespread physical damage to the membrane following freeze-thaw. Sperm motility, however, was unrelated to any measure of membrane physiology used in this study. Our results demonstrate that ARTs have the potential to substantially affect the sperm plasma membrane, but not always detrimentally. These results provide multiple potential biomarkers of sperm quality as well as insight into sources of sub-fertility resulting from use of ARTs.
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Affiliation(s)
- Bryan Blawut
- The Ohio State University, College of Veterinary Medicine, Department of Veterinary Clinical Sciences, Columbus, OH, USA
| | - Barbara Wolfe
- The Ohio State University, College of Veterinary Medicine, Department of Veterinary Preventive Medicine, Columbus, OH, USA
| | - Chris Premanandan
- The Ohio State University, College of Veterinary Medicine, Department of Veterinary Biosciences, Columbus, OH, USA
| | - Gustavo Schuenemann
- The Ohio State University, College of Veterinary Medicine, Department of Veterinary Preventive Medicine, Columbus, OH, USA
| | - Stuart A Ludsin
- The Ohio State University, Department of Ecology, Evolution and Organismal Biology, Aquatic Ecology Lab, Columbus, OH, USA
| | - Shan-Lu Liu
- The Ohio State University, College of Veterinary Medicine, Department of Veterinary Biosciences, Viruses and Emerging Pathogens Program, The Infectious Diseases Institute, Columbus, OH, USA
| | - D N Rao Veeramachaneni
- Colorado State University, College of Veterinary Medicine and Biomedical Sciences, Animal Reproduction and Biotechnology Laboratory, Fort Collins, CO, USA
| | - Marco A Coutinho da Silva
- The Ohio State University, College of Veterinary Medicine, Department of Veterinary Clinical Sciences, Columbus, OH, USA.
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Sushadi PS, Kuwabara M, Iimura H, Asano A. Factors affecting cryopreservation-associated damages in sperm motility of cockerels ( Gallus gallus domesticus). Br Poult Sci 2023; 64:129-136. [PMID: 36103116 DOI: 10.1080/00071668.2022.2124099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
1. Sperm are exposed to severe osmotic stress during cryopreservation, which results in impairment of fertilisation ability, including motility and viability, in poultry. Sperm osmotolerance is regulated by many extracellular factors and varies widely in birds, leading to uncertainty in the nature of the osmotic injury.2. Tail bending is a primary response resulting from cell swelling from excessive osmotic stress. However, the underlying mechanism responsible for tail bending is largely unknown. This study examined the relationship between osmotic stress and post-thaw motility, with a particular focus on the role of Na+/K+ ATPase (NKA) in the tail bending response.3. Cryopreserved sperm exhibited rapidly reduced motility when maintained at 37°C. The combination of temperature change and osmotic stress was a primary factor responsible for tail bending. This work tested a hypothesis known to be associated with post-thaw tail abnormality in other species and found that cold shock, that is not accompanied by an apoptotic response, may occur. Ouabain inhibition of Na+/K+ ATPase activity alleviated the tail bending response in fresh and post-thaw sperm.4. These results demonstrated that the combination of temperature change and osmotic stress has a primary impact on the reduction of post-thaw motility, with a particular role in NKA activity, in the tail bending response of chicken sperm. These results provide a foundation for establishing cryopreservation methodology to ensure the optimal fertilisation potential of cryopreserved chicken sperm.
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Affiliation(s)
- P S Sushadi
- Graduate School of Life and Environmental Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - M Kuwabara
- College of Agro-biological Resource Sciences, University of Tsukuba, Tsukuba, Japan
| | - H Iimura
- Graduate School of Life and Environmental Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - A Asano
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
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Testis-Specific Isoform of Na+-K+ ATPase and Regulation of Bull Fertility. Int J Mol Sci 2022; 23:ijms23147936. [PMID: 35887284 PMCID: PMC9317330 DOI: 10.3390/ijms23147936] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/08/2022] [Accepted: 07/11/2022] [Indexed: 12/10/2022] Open
Abstract
An advanced understanding of sperm function is relevant for evidence-based male fertility prediction and addressing male infertility. A standard breeding soundness evaluation (BSE) merely identifies gross abnormalities in bulls, whereas selection based on single nucleotide polymorphisms and genomic estimated breeding values overlooks sub-microscopic differences in sperm. Molecular tools are important for validating genomic selection and advancing knowledge on the regulation of male fertility at an interdisciplinary level. Therefore, research in this field is now focused on developing a combination of in vitro sperm function tests and identifying biomarkers such as sperm proteins with critical roles in fertility. The Na+-K+ ATPase is a ubiquitous transmembrane protein and its α4 isoform (ATP1A4) is exclusively expressed in germ cells and sperm. Furthermore, ATP1A4 is essential for male fertility, as it interacts with signaling molecules in both raft and non-raft fractions of the sperm plasma membrane to regulate capacitation-associated signaling, hyperactivation, sperm-oocyte interactions, and activation. Interestingly, ATP1A4 activity and expression increase during capacitation, challenging the widely accepted dogma of sperm translational quiescence. This review discusses the literature on the role of ATP1A4 during capacitation and fertilization events and its prospective use in improving male fertility prediction.
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Membrane-Mediated Regulation of Sperm Fertilization Potential in Poultry. J Poult Sci 2021; 59:114-120. [PMID: 35528376 PMCID: PMC9039145 DOI: 10.2141/jpsa.0210104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 11/06/2021] [Indexed: 11/21/2022] Open
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Priyadarshana C, Setiawan R, Tajima A, Asano A. Src family kinases-mediated negative regulation of sperm acrosome reaction in chickens (Gallus gallus domesticus). PLoS One 2020; 15:e0241181. [PMID: 33180820 PMCID: PMC7660528 DOI: 10.1371/journal.pone.0241181] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 10/06/2020] [Indexed: 11/19/2022] Open
Abstract
The acrosome reaction (AR) is a strictly-regulated, synchronous exocytosis that is required for sperm to penetrate ova. This all-or-nothing process occurs only once in the sperm lifecycle through a sequence of signaling pathways. Spontaneous, premature AR therefore compromises fertilization potential. Although protein kinase A (PKA) pathways play a central role in AR across species, the signaling network used for AR induction is poorly understood in birds. Mechanistic studies of mammalian sperm AR demonstrate that PKA activity is downstreamly regulated by Src family kinases (SFKs). Using SFK inhibitors, our study shows that in chicken sperm, SFKs play a role in the regulation of PKA activity and spontaneous AR without affecting motility. Furthermore, we examined the nature of SFK phosphorylation using PKA and protein tyrosine phosphatase inhibitors, which demonstrated that unlike in mammals, SFK phosphorylation in birds does not occur downstream of PKA and is primarily regulated by calcium-dependent tyrosine phosphatase activity. Functional characterization of SFKs in chicken sperm showed that SFK activation modulates the membrane potential and plays a role in inhibiting spontaneous AR. Employing biochemical isolation, we also found that membrane rafts are involved in the regulation of SFK phosphorylation. This study demonstrates a unique mechanism for regulating AR induction inherent to avian sperm that ensure fertilization potential despite prolonged storage.
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Affiliation(s)
- Chathura Priyadarshana
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Rangga Setiawan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Atsushi Tajima
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Atsushi Asano
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
- * E-mail:
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Priyadarshana C, Tajima A, Ishikawa N, Asano A. Membrane rafts regulate sperm acrosome reaction via cAMP-dependent pathway in chickens (Gallus gallus domesticus). Biol Reprod 2019; 99:1000-1009. [PMID: 29788183 DOI: 10.1093/biolre/ioy120] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Accepted: 05/16/2018] [Indexed: 11/13/2022] Open
Abstract
Both transcriptionally and translationally inactive sperm need preassembled pathways into specific cellular compartments to function. Although initiation of the acrosome reaction (AR) involves several signaling pathways including protein kinase A (PKA) activation, how these are regulated remains poorly understood in avian sperm. Membrane rafts are specific membrane regions enriched in sterols and functional proteins and play important roles in diverse cellular processes, including signal transduction. Our recent studies on chicken sperm demonstrated that membrane rafts exist and play a role in multistage fertilization. These, combined with the functional importance of membrane rafts in mammalian sperm AR, prompted us to investigate the roles of membrane rafts in signaling pathways leading to AR in chicken sperm. Using 2-hydroxypropyl-β-cyclodextrin (2-OHCD), we found that the disruption of membrane rafts inhibits PKA activity and AR without affecting protein tyrosine phosphorylation; however, these inhibitions were abolished in the presence of a cyclic 3,5-adenosine monophosphate (cAMP) analog. In addition, biochemical experiments showed a decrease in cAMP content in 2-OHCD-treated sperm, suggesting the involvement of soluble adenylyl cyclase (sAC) and transmembrane adenylyl cyclase (tmAC). Pharmacological experiments, combined with transcriptome analysis, showed that sAC and tmAC are present and involved in AR induction in chicken sperm. Furthermore, stimulation of both isoforms reversed the inhibition of PKA activity and AR in 2-OHCD-treated sperm. In conclusion, our results demonstrated that membrane rafts play an important role in AR induction by regulating the cAMP-dependent pathway and that they provide a mechanistic insight into membrane regulation of AR and sperm function in birds.
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Affiliation(s)
- Chathura Priyadarshana
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Atsushi Tajima
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Naoto Ishikawa
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Atsushi Asano
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Ushiyama A, Priyadarshana C, Setiawan R, Miyazaki H, Ishikawa N, Tajima A, Asano A. Membrane raft-mediated regulation of glucose signaling pathway leading to acrosome reaction in chicken sperm†. Biol Reprod 2019; 100:1482-1491. [DOI: 10.1093/biolre/ioz015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/21/2018] [Accepted: 02/01/2019] [Indexed: 01/13/2023] Open
Affiliation(s)
- Ai Ushiyama
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Chathura Priyadarshana
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Rangga Setiawan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Hitoshi Miyazaki
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Naoto Ishikawa
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Atsushi Tajima
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Atsushi Asano
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
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