1
|
Fuentes F, Contreras MJ, Arroyo-Salvo C, Cabrera P P, Silva M, Merino O, Arias ME, Felmer R. Effect of exogenous sperm capacitation inducers on stallion sperm. Theriogenology 2024; 226:29-38. [PMID: 38824691 DOI: 10.1016/j.theriogenology.2024.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 05/17/2024] [Accepted: 05/28/2024] [Indexed: 06/04/2024]
Abstract
Although under appropriate laboratory conditions, sperm from different mammalian species can be capacitated in vitro, the optimal conditions for sperm capacitation in the stallion have been elusive. This study evaluated the effect of different capacitating inducers in Whitten and Tyrode media and assessed their impact on capacitation-related factors. Stallion sperm were incubated with different combinations of capacitating inducers at 38.5 °C in an air atmosphere. Sperm quality variables such as motility, mitochondrial membrane potential, and lipid peroxidation were assessed. Membrane fluidity and intracellular calcium levels were evaluated as early markers of capacitation, while tyrosine phosphorylation events and the sperm's ability to perform acrosomal exocytosis were used as late capacitation markers. Finally, these sperm were evaluated using a heterologous zona pellucida binding assay. The findings confirm that capacitating conditions evaluated increase intracellular calcium levels and membrane fluidity in both media. Similarly, including 2 or 3 inducers in both media increased tyrosine phosphorylation levels and acrosomal exocytosis after exposure to progesterone, confirming that stallion sperm incubated in these conditions shows cellular and molecular changes consistent with sperm capacitation. Furthermore, the zona pellucida binding assay confirmed the binding capacity of sperm incubated in capacitation conditions, a key step for stallion in vitro fertilization success. Further studies are needed to evaluate the effect of these conditions on in vitro fertilization in the horse.
Collapse
Affiliation(s)
- Fernanda Fuentes
- Laboratory of Reproduction, Center of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Doctoral Program in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - Maria Jose Contreras
- Laboratory of Reproduction, Center of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - Camila Arroyo-Salvo
- Laboratory of Reproduction, Center of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - Paulina Cabrera P
- Laboratory of Reproduction, Center of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - Mauricio Silva
- Department of Veterinary Sciences and Public Health, Universidad Catolica de Temuco, Temuco, Chile
| | - Osvaldo Merino
- Department of Basic Sciences, Faculty of Medicine. Universidad de La Frontera, Temuco, Chile
| | - Maria Elena Arias
- Laboratory of Reproduction, Center of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Department of Agricultural Production, Faculty of Agriculture and Environmental Sciences, Universidad de La Frontera, Temuco, Chile
| | - Ricardo Felmer
- Laboratory of Reproduction, Center of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Department of Agricultural Sciences and Natural Resources, Faculty of Agriculture and Environmental Sciences, Universidad de La Frontera, Temuco, Chile.
| |
Collapse
|
2
|
Mogielnicka-Brzozowska M, Cichowska AW. Molecular Biomarkers of Canine Reproductive Functions. Curr Issues Mol Biol 2024; 46:6139-6168. [PMID: 38921038 PMCID: PMC11202846 DOI: 10.3390/cimb46060367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/05/2024] [Accepted: 06/12/2024] [Indexed: 06/27/2024] Open
Abstract
The aim of the current study is to review potential molecular biomarker substances selected so far as useful for assessing the quality of dog semen. Proteins, lipids, carbohydrates, and ions can serve as molecular biomarkers of reproductive functions (BRFs) for evaluating male reproductive health and identifying potential risk factors for infertility or reproductive disorders. Evaluation of BRF levels in semen samples or reproductive tissues may provide insights into the underlying causes of infertility, such as impaired sperm function, abnormal sperm-egg interaction, or dysfunction of the male reproductive tract. Molecular biomarker proteins may be divided into two groups: proteins that are well-studied, such as A-kinase anchoring proteins (AKAPs), albumins (ALBs), alkaline phosphatase (ALPL), clusterin (CLU), canine prostate-specific esterase (CPSE), cysteine-rich secretory protein 2 (CRISP2), lactotransferrin (LTF), metalloproteinases (MMPs), and osteopontin (OPN) and proteins that are not well-studied. Non-protein markers include lipid-based substances (fatty acids, phosphatidylcholine), carbohydrates (glycosaminoglycans), and ions (zinc, calcium). Assessing the levels of BRFs in semen samples may provide valuable information for breeding management and reproductive assessments in dogs. This review systematizes current knowledge that could serve as a starting point for developing practical tests with the use of biomarkers of canine reproductive functions and their predictive value for assisted reproductive technique outcomes and semen preservation.
Collapse
Affiliation(s)
- Marzena Mogielnicka-Brzozowska
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-719 Olsztyn, Poland
| | | |
Collapse
|
3
|
Ramírez-Agámez L, Hernández-Avilés C, Ortíz I, Love CC, Varner DD, Hinrichs K. Lactate as the sole energy substrate induces spontaneous acrosome reaction in viable stallion spermatozoa. Andrology 2024; 12:459-471. [PMID: 37300872 DOI: 10.1111/andr.13479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 05/02/2023] [Accepted: 06/07/2023] [Indexed: 06/12/2023]
Abstract
BACKGROUND Equine spermatozoa appear to differ from spermatozoa of other species in using oxidative phosphorylation preferentially over glycolysis. However, there is little information regarding effects of different energy sources on measured parameters in equine spermatozoa. OBJECTIVE To determine the effect of three individual energy substrates, glucose, pyruvate, and lactate, on motion characteristics, membrane integrity, and acrosomal status of stallion spermatozoa. MATERIALS AND METHODS Freshly ejaculated stallion spermatozoa were incubated with combinations of glucose (5 mm), pyruvate (10 mm), and lactate (10 mm) for 0.5 to 4 h. Response to calcium ionophore A23187 (5 μm) was used to evaluate capacitation status. Motility was evaluated using computer-assisted sperm analysis, and plasma membrane and acrosomal integrity were evaluated by flow cytometry. RESULTS Incubation with lactate alone for 2 h increased acrosomal sensitivity to A23187. Notably, incubation with lactate alone for 4 h induced a significant spontaneous increase in acrosome-reacted, membrane-intact (viable) spermatozoa, to approximately 50% of the live population, whereas no increase was seen with incubation in glucose or pyruvate alone. This acrosomal effect was observed in spermatozoa incubated at physiological pH as well as under alkaline conditions (medium pH approximately 8.5). Sperm motility declined concomitantly with the increase in acrosome-reacted spermatozoa. Sperm motility was significantly higher in pyruvate-only medium than in glucose or lactate. The addition of pyruvate to lactate-containing medium increased sperm motility but reduced the proportion of live acrosome-reacted spermatozoa in a dose-dependent fashion. DISCUSSION This is the first study to demonstrate that incubation with a specific energy substrate, lactate, is associated with spontaneous acrosome reaction in spermatozoa. The proportion of live, acrosome-reacted spermatozoa obtained is among the highest reported for equine spermatozoa. CONCLUSION These findings highlight the delicate control of key sperm functions, and may serve as a basis to increase our understanding of stallion sperm physiology.
Collapse
Affiliation(s)
- Luisa Ramírez-Agámez
- Department of Veterinary Physiology and Pharmacology, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, USA
- Department of Large Animal Clinical Sciences, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Camilo Hernández-Avilés
- Department of Large Animal Clinical Sciences, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Isabel Ortíz
- Department of Veterinary Physiology and Pharmacology, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Charles C Love
- Department of Large Animal Clinical Sciences, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Dickson D Varner
- Department of Large Animal Clinical Sciences, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Katrin Hinrichs
- Department of Veterinary Physiology and Pharmacology, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, USA
- Department of Large Animal Clinical Sciences, School of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, USA
- Department of Clinical Studies - New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, Pennsylvania, USA
| |
Collapse
|
4
|
Cichowska AW, Wisniewski J, Bromke MA, Olejnik B, Mogielnicka-Brzozowska M. Proteome Profiling of Canine Epididymal Fluid: In Search of Protein Markers of Epididymal Sperm Motility. Int J Mol Sci 2023; 24:14790. [PMID: 37834239 PMCID: PMC10573609 DOI: 10.3390/ijms241914790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/21/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023] Open
Abstract
Sperm maturation in the epididymis is based on interactions with proteins from epididymal fluid (EF). The aim of the study was to profile canine EF proteome and investigate correlations between EF protein content and epididymal spermatozoa (ES) motion parameters. Twenty-three male dogs were divided into two groups: good sperm motility (GSM) and poor sperm motility (PSM). The total motility and progressive motility differed significantly (p = 0.031; p < 0.001, respectively) between the GSM group and the PSM group. The semen samples were centrifuged to separate the EF apart from the ES. The canine EF proteins were analyzed using nano-liquid chromatography, which was coupled with quadrupole time-of-flight mass spectrometry (NanoUPLC-Q-TOF/MS) and bioinformatic tools for the first time. A total of 915 proteins were identified (GSM-506; PSM-409, respectively). UniProt identification resulted in six unique proteins (UPs) in the GSM group of dogs and four UPs in the PSM group. A semi-quantitative analysis showed a higher abundance (p < 0.05) of four differentially expressed proteins in the GSM group (ALB, CRISP2, LCNL1, PTGDS). Motility-dependent variations were detected in the EF proteome and were related to important metabolic pathways, which might suggest that several proteins could be potential ES motility biomarkers.
Collapse
Affiliation(s)
- Aleksandra W. Cichowska
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-719 Olsztyn, Poland
| | - Jerzy Wisniewski
- Department of Biochemistry, Molecular Biology and Biotechnology, Wroclaw University of Science and Technology, Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Mariusz A. Bromke
- Department of Biochemistry and Immunochemistry, Wroclaw Medical University, Chalubinskiego 10, 50-368 Wroclaw, Poland
| | - Beata Olejnik
- Department of Biochemistry and Immunochemistry, Wroclaw Medical University, Chalubinskiego 10, 50-368 Wroclaw, Poland
| | - Marzena Mogielnicka-Brzozowska
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-719 Olsztyn, Poland
| |
Collapse
|
5
|
The stallion sperm acrosome: Considerations from a research and clinical perspective. Theriogenology 2023; 196:121-149. [PMID: 36413868 DOI: 10.1016/j.theriogenology.2022.11.012] [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: 08/30/2022] [Revised: 11/02/2022] [Accepted: 11/07/2022] [Indexed: 11/16/2022]
Abstract
During the fertilization process, the interaction between the sperm and the oocyte is mediated by a process known as acrosomal exocytosis (AE). Although the role of the sperm acrosome on fertilization has been studied extensively over the last 70 years, little is known about the molecular mechanisms that govern acrosomal function, particularly in species other than mice or humans. Even though subfertility due to acrosomal dysfunction is less common in large animals than in humans, the evaluation of sperm acrosomal function should be considered not only as a complementary but a routine test when individuals are selected for breeding potential. This certainly holds true for stallions, which might display lower levels of fertility in the face of "acceptable" sperm quality parameters determined by conventional sperm assays. Nowadays, the use of high throughput technologies such as flow cytometry or mass spectrometry-based proteomic analysis is commonplace in the research arena. Such techniques can also be implemented in clinical scenarios of males with "idiopathic" subfertility. The current review focuses on the sperm acrosome, with particular emphasis on the stallion. We aim to describe the physiological events that lead to the acrosome formation within the testis, the role of very specific acrosomal proteins during AE, the methods to study the occurrence of AE under in vitro conditions, and the potential use of molecular biology techniques to discover new markers of acrosomal function and subfertility associated with acrosomal dysfunction in stallions.
Collapse
|
6
|
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: 5] [Impact Index Per Article: 2.5] [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.
Collapse
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.
| |
Collapse
|
7
|
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.
Collapse
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.
| |
Collapse
|
8
|
SERPINA5 Protein in Cumulus-Oocyte Complexes Increases the Fertilisation Ability of Mouse Sperm. Reprod Sci 2022; 29:2350-2362. [PMID: 35194761 DOI: 10.1007/s43032-022-00867-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 01/23/2022] [Indexed: 10/19/2022]
Abstract
Obtaining high-quality sperm is key to improving the success rate of assisted reproductive technology (ART). Although cytokines secreted by cumulus-oocyte complexes (COCs) bind to sperm surface receptors to improve sperm quality, the effects of adding mouse COCs to human tubal fluid (HTF) medium on sperm capacitation have not yet been explored. Eight-week-old ICR mouse COCs were added to HTF medium and crushed to obtain the post-modified HTF medium. Compared with using HTF medium, the fertilisation rate and number of sperm combined with the zona pellucida significantly increased after in vitro capacitation using the post-modified HTF medium (P < 0.01). Proteomic and Western blotting analyses showed that the level of SERPINA5 in sperm increased significantly following in vitro capacitation with the post-modified HTF medium (P < 0.05). Immunohistochemical staining analysis demonstrated that SERPINA5 protein was expressed in mouse cumulus cells. A SERPINA5 antibody was added in the post-modified HTF medium to block the effects of SERPINA5 after in vitro capacitation, which significantly decreased the fertilisation rate and the number of sperm combined with the zona pellucida (P < 0.05). Recombinant mouse SERPINA5 protein (1 ~ 2 μg/ml) was added to HTF medium and the fertilisation rate and the number of sperm combined with the zona pellucida significantly increased (P < 0.01). Moreover, recombinant human SERPINA5 protein (5 μg/ml) was added before human semen freezing. Compared with adding no SERPINA5 protein, the percentage of normal sperm morphology and the intact acrosome significantly increased (P < 0.05). Our study provides a reference method for optimising sperm quality in the process of in vitro capacitation.
Collapse
|
9
|
Selected metabolites found in equine oviductal fluid do not modify the parameters associated to capacitation of the frozen-thawed equine spermatozoa in vitro. J Equine Vet Sci 2022; 111:103875. [DOI: 10.1016/j.jevs.2022.103875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/18/2022] [Accepted: 01/18/2022] [Indexed: 12/26/2022]
|
10
|
Maitan PP, Bromfield EG, Hoogendijk R, Leung MR, Zeev-Ben-Mordehai T, van de Lest CH, Jansen JWA, Leemans B, Guimarães JD, Stout TAE, Gadella BM, Henning H. Bicarbonate-Stimulated Membrane Reorganization in Stallion Spermatozoa. Front Cell Dev Biol 2021; 9:772254. [PMID: 34869370 PMCID: PMC8635755 DOI: 10.3389/fcell.2021.772254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 10/25/2021] [Indexed: 11/13/2022] Open
Abstract
Classical in vitro fertilization (IVF) is still poorly successful in horses. This lack of success is thought to be due primarily to inadequate capacitation of stallion spermatozoa under in vitro conditions. In species in which IVF is successful, bicarbonate, calcium, and albumin are considered the key components that enable a gradual reorganization of the sperm plasma membrane that allows the spermatozoa to undergo an acrosome reaction and fertilize the oocyte. The aim of this work was to comprehensively examine contributors to stallion sperm capacitation by investigating bicarbonate-induced membrane remodelling steps, and elucidating the contribution of cAMP signalling to these events. In the presence of capacitating media containing bicarbonate, a significant increase in plasma membrane fluidity was readily detected using merocyanine 540 staining in the majority of viable spermatozoa within 15 min of bicarbonate exposure. Specific inhibition of soluble adenylyl cyclase (sAC) in the presence of bicarbonate by LRE1 significantly reduced the number of viable sperm with high membrane fluidity. This suggests a vital role for sAC-mediated cAMP production in the regulation of membrane fluidity. Cryo-electron tomography of viable cells with high membrane fluidity revealed a range of membrane remodelling intermediates, including destabilized membranes and zones with close apposition of the plasma membrane and the outer acrosomal membrane. However, lipidomic analysis of equivalent viable spermatozoa with high membrane fluidity demonstrated that this phenomenon was neither accompanied by a gross change in the phospholipid composition of stallion sperm membranes nor detectable sterol efflux (p > 0.05). After an early increase in membrane fluidity, a significant and cAMP-dependent increase in viable sperm with phosphatidylserine (PS), but not phosphatidylethanolamine (PE) exposure was noted. While the events observed partly resemble findings from the in vitro capacitation of sperm from other mammalian species, the lack of cholesterol removal appears to be an equine-specific phenomenon. This research will assist in the development of a defined medium for the capacitation of stallion sperm and will facilitate progress toward a functional IVF protocol for horse gametes.
Collapse
Affiliation(s)
- Paula Piccolo Maitan
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands.,Department of Veterinary Medicine, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Elizabeth G Bromfield
- Department of Biomolecular Health Science, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands.,Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia
| | - Romy Hoogendijk
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Miguel Ricardo Leung
- Cryo-Electron Microscopy, Bijvoet Centre for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Tzviya Zeev-Ben-Mordehai
- Cryo-Electron Microscopy, Bijvoet Centre for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Chris H van de Lest
- Department of Biomolecular Health Science, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Jeroen W A Jansen
- Department of Biomolecular Health Science, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Bart Leemans
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | | | - Tom A E Stout
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Bart M Gadella
- Department of Biomolecular Health Science, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands.,Department of Population Health Science, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Heiko Henning
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| |
Collapse
|
11
|
Sampaio B, Ortiz I, Resende H, Felix M, Varner D, Hinrichs K. Factors affecting intracellular calcium influx in response to calcium ionophore A23187 in equine sperm. Andrology 2021; 9:1631-1651. [PMID: 33998170 DOI: 10.1111/andr.13036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 05/08/2021] [Accepted: 05/12/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Exposure to the calcium ionophore A23187 may present a "universal" sperm treatment for IVF, as it bypasses capacitation pathways. However, success in utilizing A23187 is variable, especially in equine spermatozoa. Notably, albumin is used during A23187 treatment but paradoxically is thought to suppress A23187 action. Essentially no critical data are available on the effects of A23187 and albumin concentrations, ratios, or addition protocols on changes in intracellular calcium ([Ca]i ) in any cell type. OBJECTIVE To determine factors that affect the action of A23187 on [Ca]i in equine and murine spermatozoa. METHODS Spermatozoa were loaded with Fluo-4 and changes in fluorescence after A23187 treatment were measured under various conditions using a microplate reader. RESULTS Concentrations of bovine serum albumin (BSA) and A23187, type of BSA, makeup of A23187 stock solutions (i.e., 1° stock (DMSO) or 2° stock made with medium, water or DMSO), order of addition of spermatozoa and A23187, incubation of media before sperm addition, species of spermatozoa, and time of addition of BSA all affected [Ca]i in response to A23187 treatment. In equine spermatozoa already exposed to 10 µM A23187, addition of BSA to 33 mg/ml to "quench" the A23187 did not affect [Ca]i . When this concentration of BSA was added to spermatozoa exposed to 1 µM A23187, [Ca]i in murine spermatozoa returned to baseline, however, equine spermatozoa continued to exhibit increased [Ca]i . Addition of BSA to 33 mg/ml to media containing 1 µM A23187, prior to addition of spermatozoa, completely inhibited change in [Ca]i in both murine and equine spermatozoa. CONCLUSION These results represent some of the first critical data on the effects of albumin and other procedural factors on A23187-induced changes in [Ca]i in any cell type. Our findings help to explain the variability in reported response of spermatozoa to A23187 among species and among laboratories.
Collapse
Affiliation(s)
- Breno Sampaio
- College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Isabel Ortiz
- College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Hélène Resende
- College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Matheus Felix
- College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Dickson Varner
- College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Katrin Hinrichs
- College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, USA
| |
Collapse
|
12
|
Flow-cytometric analysis of membrane integrity of stallion sperm in the face of agglutination: the "zombie sperm" dilemma. J Assist Reprod Genet 2021; 38:2465-2480. [PMID: 33991296 PMCID: PMC8490572 DOI: 10.1007/s10815-021-02134-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/25/2021] [Indexed: 10/31/2022] Open
Abstract
PURPOSE To define the effect of sperm agglutination, associated with incubation under capacitating conditions, on accuracy of membrane assessment via flow cytometry and to develop methods to mitigate that effect. METHODS Sperm motility was measured by CASA. Sperm were stained with PI-PSA or a novel method, LD-PSA, using fixable live/dead stain and cell dissociation treatment, before flow-cytometric analysis. Using LD-PSA, acrosome reaction and plasma membrane status were determined in equine sperm treated with 10 μm A23187 for 10 min, followed by 0, 1, or 2 h incubation in capacitating conditions. RESULTS Using PI-PSA, measured membrane integrity (MI; live sperm) was dramatically lower than was total motility (TMOT), indicating spurious results ("zombie sperm"). Sperm aggregates were largely of motile sperm. Loss of motility after A23187 treatment was associated with disaggregation and increased MI. On disaggregation using LD-PSA, MI rose, and MI then corresponded with TMOT. In equine sperm incubated after A23187 treatment, as the percentage of live acrosome-reacted sperm increased, TMOT decreased to near 0. CONCLUSION Flow cytometry assesses only individualized sperm; thus, agglutination of viable sperm alters recorded membrane integrity. As viable sperm become immotile, they individualize; therefore, factors that decrease motility, such as A23187, result in increased measured MI. Disaggregation before assessment allows more accurate determination of sperm membrane status; in this case we documented a mismatch between motility and live acrosome-reacted equine sperm that may relate to the poor repeatability of A23187 treatment for equine IVF. These findings are of profound value to future studies on sperm capacitation.
Collapse
|
13
|
Gautier C, Scarlet D, Ertl R, Walter I, Wulf M, Nagel C, Aurich J, Aurich C. Expression of enzymes involved in polyunsaturated fatty acid synthesis in the stallion testis and epididymis. Reprod Fertil Dev 2021; 32:851-861. [PMID: 32527375 DOI: 10.1071/rd19342] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 03/17/2020] [Indexed: 12/31/2022] Open
Abstract
The aim of the present study was to characterise key enzymes involved in polyunsaturated fatty acid (PUFA) synthesis in the testis and epididymis collected from 2-year-old healthy warmblood stallions (n=10). The mRNA expression of fatty acid synthase, the Δ9-, Δ6-, Δ5- and Δ4-desaturases and elongases 6, 5 and 2 (encoded by the fatty acid synthase (FASN), the stearoyl-CoA desaturase (SCD), the fatty acid desaturase 2 (FADS2), the fatty acid desaturase 1 (FADS1), the delta 4-desaturase, sphingolipid 1 (DEGS1), ELOVL fatty acid elongase 6(ELOVL6), ELOVL fatty acid elongase 5 (ELOVL5), ELOVL fatty acid elongase 2 (ELOVL2) genes respectively) was determined in equine testis and epididymis. All enzymes were present in testicular tissue and along the epididymis, but mRNA expression differed among localisations. The protein localisation of FADS1, FADS2 and ELOVL5 was determined by immunohistochemistry. In the testes, FADS1 was expressed in the germinal cells and ELOVL5 was expressed in germinal and Leydig cells; FADS2 was not detected. In the epididymis, FADS1 and FADS2 were expressed in the principal and basal cells, whereas ELOVL5 was found only in the principal cells of the caput. All three enzymes were present in epididymal vesicles secreted by an apocrine mechanism. These results suggest active PUFA metabolism during spermatogenesis and epididymal sperm maturation in stallions.
Collapse
Affiliation(s)
- Camille Gautier
- Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria
| | - Dragos Scarlet
- Gynecology, Obstetrics and Andrology, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria
| | - Reinhard Ertl
- Vetcore Facility for Research, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria
| | - Ingrid Walter
- Institute of Pathology, Department of Pathobiology, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria
| | - Manuela Wulf
- Graf Lehndorff Institute, Vetmeduni Vienna, Hauptgestüt 10, 16845 Neustadt (Dosse), Germany
| | - Christina Nagel
- Graf Lehndorff Institute, Vetmeduni Vienna, Hauptgestüt 10, 16845 Neustadt (Dosse), Germany
| | - Jörg Aurich
- Gynecology, Obstetrics and Andrology, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria
| | - Christine Aurich
- Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria; and Corresponding author.
| |
Collapse
|
14
|
Dalal J, Chandolia RK, Pawaria S, Kumar A, Kumar D, Selokar NL, Andonissamy J, Yadav PS, Kumar P. Low-density lipoproteins protect sperm during cryopreservation in buffalo: Unraveling mechanism of action. Mol Reprod Dev 2020; 87:1231-1244. [PMID: 33140487 DOI: 10.1002/mrd.23434] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/15/2020] [Accepted: 10/13/2020] [Indexed: 12/17/2022]
Abstract
This study was carried out to reveal factors and the mechanism of action by which low-density lipoproteins (LDLs) protect sperm better than egg yolk (EY) during cryopreservation. We extracted LDL from EY and compared the amount of calcium, progesterone, and antioxidants in EY and LDL. We found a very high concentration of progesterone (1423.95 vs. 10.46 ng/ml) and calcium (29.19 vs. 0.47 mM) in EY as compared with LDL. Antioxidant assays like DPPH (2,2-diphenyl-1-picrylhydrazyl) and the ferric reducing antioxidants power assay revealed that the LDL extender had almost double ability to lose hydrogen than the EY extender. For sperm cryopreservation, 20 ejaculates from four Murrah buffalo bulls were collected. Each ejaculate was divided into four aliquots and extended in 10%, 12%, and 14% LDL (w/v) and EY-based extenders, followed by cryopreservation. The LDL-based extender prevented excessive cholesterol efflux, and its high content of antioxidants minimized reactive oxygen species generated during cryopreservation, resulting in a functional CatSper channel. The EY-based extender promoted excess cholesterol efflux due to the presence of high-density lipoprotein, resulting in a compromised CatSper channel. High intracellular calcium in a cryopreserved sperm in the EY group as compared with the LDL group indicates that progesterone present in EY activates the CatSper channel, resulting in a heavy calcium influx into the sperm. The greater tyrosine phosphorylation and increased number of F-pattern in the sperm cryopreserved in the EY extender indicate that high intracellular calcium triggers more capacitation-like changes in the sperm cryopreserved in EY than LDL extender. In conclusion, we demonstrated the new facts and understandings about LDL and EY for semen cryopreservation.
Collapse
Affiliation(s)
- Jasmer Dalal
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana, India.,Department of Veterinary Gynaecology and Obstetrics, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Ramesh K Chandolia
- Department of Veterinary Gynaecology and Obstetrics, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Shikha Pawaria
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana, India
| | - Aman Kumar
- Department of Animal Biotechnology, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana, India
| | - Dharmendra Kumar
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana, India
| | - Naresh L Selokar
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana, India
| | - Jerome Andonissamy
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana, India
| | - Prem S Yadav
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana, India
| | - Pradeep Kumar
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana, India
| |
Collapse
|
15
|
Ruiz-Díaz S, Oseguera-López I, De La Cuesta-Díaz D, García-López B, Serres C, Sanchez-Calabuig MJ, Gutiérrez-Adán A, Perez-Cerezales S. The Presence of D-Penicillamine during the In Vitro Capacitation of Stallion Spermatozoa Prolongs Hyperactive-Like Motility and Allows for Sperm Selection by Thermotaxis. Animals (Basel) 2020; 10:ani10091467. [PMID: 32825582 PMCID: PMC7552178 DOI: 10.3390/ani10091467] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/12/2020] [Accepted: 08/18/2020] [Indexed: 12/20/2022] Open
Abstract
Assisted reproductive technologies (ARTs) in the horse still yield suboptimal results in terms of pregnancy rates. One of the reasons for this is the lack of optimal conditions for the sperm capacitation in vitro. This study assesses the use of synthetic human tubal fluid (HTF) supplemented with D-penicillamine (HTF + PEN) for the in vitro capacitation of frozen/thawed stallion spermatozoa by examining capacitation-related events over 180 min of incubation. Besides these events, we explored the in vitro capacity of the spermatozoa to migrate by thermotaxis and give rise to a population of high-quality spermatozoa. We found that HTF induced higher levels of hyperactive-like motility and protein tyrosine phosphorylation (PTP) compared to the use of a medium commonly used in this species (Whitten's). Also, HTF + PEN was able to maintain this hyperactive-like motility, otherwise lost in the absence of PEN, for 180 min, and also allowed for sperm selection by thermotaxis in vitro. Remarkably, the selected fraction was enriched in spermatozoa showing PTP along the whole flagellum and lower levels of DNA fragmentation when compared to the unselected fraction (38% ± 11% vs 4.4% ± 1.1% and 4.2% ± 0.4% vs 11% ± 2% respectively, t-test p < 0.003, n = 6). This procedure of in vitro capacitation of frozen/thawed stallion spermatozoa in HTF + PEN followed by in vitro sperm selection by thermotaxis represents a promising sperm preparation strategy for in vitro fertilization and intracytoplasmic sperm injection in this species.
Collapse
Affiliation(s)
- Sara Ruiz-Díaz
- Department of Animal Reproduction, National Institute for Agriculture and Food Research and Technology (INIA), 28040 Madrid, Spain; (S.R.-D.); (D.D.L.C.-D.); (B.G.-L.); (S.P.-C.)
- Mistral Fertility Clinics S.L., Clínica Tambre, 28002 Madrid, Spain
| | - Ivan Oseguera-López
- Unidad Iztapalapa, Universidad Autónoma Metropolitana, Ciudad de México 09340, Mexico;
| | - David De La Cuesta-Díaz
- Department of Animal Reproduction, National Institute for Agriculture and Food Research and Technology (INIA), 28040 Madrid, Spain; (S.R.-D.); (D.D.L.C.-D.); (B.G.-L.); (S.P.-C.)
| | - Belén García-López
- Department of Animal Reproduction, National Institute for Agriculture and Food Research and Technology (INIA), 28040 Madrid, Spain; (S.R.-D.); (D.D.L.C.-D.); (B.G.-L.); (S.P.-C.)
| | - Consuelo Serres
- Departamento de Medicina y Cirugía Animal, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain; (C.S.); (M.J.S.-C.)
| | - Maria José Sanchez-Calabuig
- Departamento de Medicina y Cirugía Animal, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain; (C.S.); (M.J.S.-C.)
| | - Alfonso Gutiérrez-Adán
- Department of Animal Reproduction, National Institute for Agriculture and Food Research and Technology (INIA), 28040 Madrid, Spain; (S.R.-D.); (D.D.L.C.-D.); (B.G.-L.); (S.P.-C.)
- Correspondence:
| | - Serafin Perez-Cerezales
- Department of Animal Reproduction, National Institute for Agriculture and Food Research and Technology (INIA), 28040 Madrid, Spain; (S.R.-D.); (D.D.L.C.-D.); (B.G.-L.); (S.P.-C.)
| |
Collapse
|
16
|
Marinaro F, Macías-García B, Sánchez-Margallo FM, Blázquez R, Álvarez V, Matilla E, Hernández N, Gómez-Serrano M, Jorge I, Vázquez J, González-Fernández L, Pericuesta E, Gutiérrez-Adán A, Casado JG. Extracellular vesicles derived from endometrial human mesenchymal stem cells enhance embryo yield and quality in an aged murine model†. Biol Reprod 2020; 100:1180-1192. [PMID: 30596891 DOI: 10.1093/biolre/ioy263] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/22/2018] [Accepted: 12/26/2018] [Indexed: 12/21/2022] Open
Abstract
Advanced age is a risk factor undermining women's fertility. Hence, the optimization of assisted reproduction techniques is an interdisciplinary challenge that requires the improvement of in vitro culture systems. Here, we hypothesize that supplementation of embryo culture medium with extracellular vesicles from endometrial-derived mesenchymal stem cells (EV-endMSCs) may have a positive impact on the embryo competence of aged oocytes. In this work, 24 weeks old B6D2 female mice were used as egg donors and in vitro fertilization assays were performed using males from the same strain (8-12 weeks); the presumptive zygotes were incubated in the presence of 0, 10, 20, 40, or 80 μg/ml of EV-endMSCs. The results from the proteomic analysis of EV-endMSCs and the classification by Reactome pathways allowed us to identify proteins closely related with the fertilization process. Moreover, in our aged murine model, the supplementation of the embryo culture medium with EV-endMSCs improved the developmental competence of the embryos as well as the total blastomere count. Finally, gene expression analysis of murine blastocysts showed significant changes on core genes related to cellular response to oxidative stress, metabolism, placentation, and trophectoderm/inner cell mass formation. In summary, we demonstrate that EV-endMSCs increase the quality of the embryos, and according to proteomic and genomic analysis, presumably by modulating the expression of antioxidant enzymes and promoting pluripotent activity. Therefore, EV-endMSCs could be a valuable tool in human assisted reproduction improving the developmental competence of aged oocytes and increasing the odds of implantation and subsequent delivery.
Collapse
Affiliation(s)
- Federica Marinaro
- Stem Cell Therapy Unit, Jesús Usón Minimally Invasive Surgery Centre (JUMISC), Cáceres, Spain
| | - Beatriz Macías-García
- Assisted Reproduction Unit, Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain
| | - Francisco Miguel Sánchez-Margallo
- Stem Cell Therapy Unit, Jesús Usón Minimally Invasive Surgery Centre (JUMISC), Cáceres, Spain.,CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Rebeca Blázquez
- Stem Cell Therapy Unit, Jesús Usón Minimally Invasive Surgery Centre (JUMISC), Cáceres, Spain.,CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Verónica Álvarez
- Stem Cell Therapy Unit, Jesús Usón Minimally Invasive Surgery Centre (JUMISC), Cáceres, Spain
| | - Elvira Matilla
- Assisted Reproduction Unit, Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain
| | - Nuria Hernández
- Assisted Reproduction Unit, Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain
| | - María Gómez-Serrano
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.,Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Inmaculada Jorge
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.,Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Jesús Vázquez
- CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.,Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Lauro González-Fernández
- Research Group of Intracellular Signaling and Technology of Reproduction (SINTREP), Institute of Biotechnology in Agriculture and Livestock (INBIO G+C), University of Extremadura, Cáceres, Spain
| | | | | | - Javier G Casado
- Stem Cell Therapy Unit, Jesús Usón Minimally Invasive Surgery Centre (JUMISC), Cáceres, Spain.,CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| |
Collapse
|
17
|
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.
Collapse
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
| |
Collapse
|
18
|
Holt WV, Satake N. Making the most of sperm activation responses: experiments with boar spermatozoa and bicarbonate. Reprod Fertil Dev 2019. [PMID: 29514735 DOI: 10.1071/rd17476] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Attempting to extract useful and reliable information about semen quality and its fertility potential remains a difficult exercise, partly because the sperm heterogeneity within samples often renders simple statistical analyses rather meaningless. In fact, a mean and standard deviation may reflect neither the very fast swimming activities of the most active cells nor the slow and sluggish activities of others. Herein we propose that the information value within semen samples can be maximised if current knowledge about sperm activation mechanisms is exploited before undertaking the measurements. We explain, using boar semen as an example, that estimating and defining relative sperm subpopulation sizes, after activation by bicarbonate, provides a means of quantifying sperm quality. Although such estimates may indeed be related to in vivo fertility, the general approach also suggests potential new avenues that could be exploited for the elaboration of novel in vitro tests for the characterisation of toxic environmental chemicals and, indeed, to reduce the number of animals used in such testing programs.
Collapse
Affiliation(s)
- William V Holt
- Academic Unit of Reproductive and Developmental Medicine, University of Sheffield, Level 4, Jessop Wing, Tree Root Walk, Sheffield S10 2SF, UK
| | - Nana Satake
- School of Veterinary Sciences, Faculty of Science, University of Queensland, Gatton Campus, Gatton, Qld 4343, Australia
| |
Collapse
|
19
|
BODIPY-cholesterol can be reliably used to monitor cholesterol efflux from capacitating mammalian spermatozoa. Sci Rep 2019; 9:9804. [PMID: 31285440 PMCID: PMC6614389 DOI: 10.1038/s41598-019-45831-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 06/11/2019] [Indexed: 02/06/2023] Open
Abstract
Capacitation is the final maturation step spermatozoa undergo prior to fertilisation. The efflux of cholesterol from the sperm membrane to the extracellular environment is a crucial step during capacitation but current methods to quantify this process are suboptimal. In this study, we validate the use of a BODIPY-cholesterol assay to quantify cholesterol efflux from spermatozoa during in vitro capacitation, using the boar as a model species. The novel flow cytometric BODIPY-cholesterol assay was validated with endogenous cholesterol loss as measured by mass spectrometry and compared to filipin labelling. Following exposure to a range of conditions, the BODIPY-cholesterol assay was able to detect and quantify cholesterol efflux akin to that measured with mass spectrometry. The ability to counterstain for viability is a unique feature of this assay that allowed us to highlight the importance of isolating viable cells only for a reliable measure of cholesterol efflux. Finally, the BODIPY-cholesterol assay proved to be the superior method to quantify cholesterol efflux relative to filipin labelling, though filipin remains useful for assessing cholesterol redistribution. Taken together, the BODIPY-cholesterol assay is a simple, inexpensive and reliable flow cytometric method for the measurement of cholesterol efflux from spermatozoa during in vitro capacitation.
Collapse
|
20
|
Bernecic NC, Gadella BM, Leahy T, de Graaf SP. Novel methods to detect capacitation-related changes in spermatozoa. Theriogenology 2019; 137:56-66. [PMID: 31230703 DOI: 10.1016/j.theriogenology.2019.05.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Prior to interaction with the oocyte, spermatozoa must undergo capacitation, which involves a series of physio-chemical transformations that occur in the female tract. As capacitation is a pre-requisite for successful fertilisation, it is a topic of great interest for sperm biologists, but the complexity of the numerous biochemical and biophysical processes involved make it difficult to measure. Capacitation is an extremely complex event that encompasses numerous integrated processes that can occur concurrently during this window of time. The identification of techniques to accurately assess and quantify capacitation is therefore crucial to gain a meaningful insight into this fascinating sperm maturation event. Whilst there are extensive reviews in the literature that focus on the functional changes to spermatozoa during capacitation, few have examined the methods required to measure these changes. The aim of this review is to highlight frequently used methods to quantify different stages of capacitation and identify promising novel techniques. Factors that are able to modulate various capacitation processes will also be discussed. The overall outcome is to provide researchers with a toolbox of methods that can be used to gain a deeper understanding of the intricacies of capacitation in spermatozoa.
Collapse
Affiliation(s)
- Naomi C Bernecic
- The University of Sydney, Faculty of Science, NSW, 2006, Australia.
| | - Bart M Gadella
- Department of Biochemistry & Cell Biology, Utrecht University, the Netherlands; Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, the Netherlands
| | - Tamara Leahy
- The University of Sydney, Faculty of Science, NSW, 2006, Australia
| | - Simon P de Graaf
- The University of Sydney, Faculty of Science, NSW, 2006, Australia
| |
Collapse
|
21
|
Arroyo-Salvo C, Sanhueza F, Fuentes F, Treulén F, Arias ME, Cabrera P, Silva M, Felmer R. Effect of human tubal fluid medium and hyperactivation inducers on stallion sperm capacitation and hyperactivation. Reprod Domest Anim 2018; 54:184-194. [DOI: 10.1111/rda.13328] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 08/22/2018] [Indexed: 12/30/2022]
Affiliation(s)
- Camila Arroyo-Salvo
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
| | - Francisco Sanhueza
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
| | - Fernanda Fuentes
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
| | - Favián Treulén
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
- School of Medical Technology, Faculty of Sciences; Universidad Mayor; Temuco Chile
| | - María Elena Arias
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
- Department of Animal Production, Faculty of Agriculture and Forestry Sciences; Universidad de La Frontera; Temuco Chile
| | - Paulina Cabrera
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN); Universidad de La Frontera; Temuco Chile
| | - Mauricio Silva
- Department of Veterinary Sciences and Public Health; Universidad Católica de Temuco; 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
| |
Collapse
|
22
|
Hidalgo M, Consuegra C, Dorado J, Diaz-Jimenez M, Ortiz I, Pereira B, Sanchez R, Crespo F. Concentrations of non-permeable cryoprotectants and equilibration temperatures are key factors for stallion sperm vitrification success. Anim Reprod Sci 2018; 196:91-98. [DOI: 10.1016/j.anireprosci.2018.06.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 06/12/2018] [Accepted: 06/28/2018] [Indexed: 10/28/2022]
|
23
|
Al-Essawe EM, Wallgren M, Wulf M, Aurich C, Macías-García B, Sjunnesson Y, Morrell JM. Seminal plasma influences the fertilizing potential of cryopreserved stallion sperm. Theriogenology 2018; 115:99-107. [PMID: 29747159 DOI: 10.1016/j.theriogenology.2018.04.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/17/2018] [Accepted: 04/18/2018] [Indexed: 02/06/2023]
Abstract
Seminal plasma (SP) contains proteins that may influence cryosurvival and prevent capacitation-like changes due to freezing and thawing. The objective of this study was to investigate the effect of adding pooled SP from "good" (GF) or "bad" (BF) freezer stallions on sperm cells' fertilizing ability. "Good freezers" refers to stallions that usually produce ejaculates which can withstand cryopreservation, whilst "bad freezer" stallions produce ejaculates which cannot tolerate the freezing process. A heterologous zona binding assay with in vitro matured bovine oocytes was used to assess the binding ability of equine sperm cells as a possible alternative to artificial insemination trials. The effect of adding SP i) prior to cryopreservation; ii) after thawing of sperm cells selected by single layer centrifugation (SLC); iii) to capacitation medium, was evaluated. Adding SP from GF stallions prior to cryopreservation reduced the mean number of sperm cells bound to the zona pellucida (ZP) compared to control (P = 0.0003), SP-free sperm cells and group received SP from BF stallions (P ≤ 0.0001 for both). After thawing SLC-selected sperm cells treated with 5% SP showed a decrease in binding ability compared with SP-free sperm cells (P ≤ 0.0001). The binding affinity of sperm cells was higher in the group treated with SP from GF than with SP from BF stallions (P ≤ 0.05). Prolonged exposure to SP impaired the ability of stallion sperm cells to undergo capacitation and bind to ZP, regardless of the source of SP (P ≤ 0.0001). The response of equine sperm cells to SP is influenced by the ability of the sperm cells to withstand cryopreservation and is affected by the timing of exposure and the origin of SP. Customization of the protocol for individual stallions is recommended to optimize the effect.
Collapse
Affiliation(s)
- Essraa M Al-Essawe
- Swedish University of Agricultural Sciences, Clinical Sciences, Uppsala, Sweden; Al-Nahrain University - High Institute of Infertility Diagnosis and Assisted Reproductive Technologies, Clinical Reproductive Physiology, Baghdad, Iraq.
| | - Margareta Wallgren
- Swedish University of Agricultural Sciences, Clinical Sciences, Uppsala, Sweden.
| | - Manuela Wulf
- Graf Lehndorff Institute for Equine Sciences, Vetmeduni Vienna, Austria, and Neustadt (Dosse), Germany.
| | - Christine Aurich
- Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, Vienna, Austria.
| | - Beatriz Macías-García
- Jesús Usón Minimally Invasive Surgery Centre (CCMIJU), Assisted Reproduction Unit, Cáceres, Spain.
| | - Ylva Sjunnesson
- Swedish University of Agricultural Sciences, Clinical Sciences, Uppsala, Sweden.
| | - Jane M Morrell
- Swedish University of Agricultural Sciences, Clinical Sciences, Uppsala, Sweden.
| |
Collapse
|
24
|
Jin SK, Yang WX. Factors and pathways involved in capacitation: how are they regulated? Oncotarget 2018; 8:3600-3627. [PMID: 27690295 PMCID: PMC5356907 DOI: 10.18632/oncotarget.12274] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 09/23/2016] [Indexed: 01/07/2023] Open
Abstract
In mammals, fertilization occurs via a comprehensive progression of events. Freshly ejaculated sperm have yet to acquire progressive motility or fertilization ability. They must first undergo a series of biochemical and physiological changes, collectively known as capacitation. Capacitation is a significant prerequisite to fertilization. During the process of capacitation, changes in membrane properties, intracellular ion concentration and the activities of enzymes, together with other protein modifications, induce multiple signaling events and pathways in defined media in vitro or in the female reproductive tract in vivo. These, in turn, stimulate the acrosome reaction and prepare spermatozoa for penetration of the egg zona pellucida prior to fertilization. In the present review, we conclude all mainstream factors and pathways regulate capacitation and highlight their crosstalk. We also summarize the relationship between capacitation and assisted reproductive technology or human disease. In the end, we sum up the open questions and future avenues in this field.
Collapse
Affiliation(s)
- Shi-Kai Jin
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Wan-Xi Yang
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou, China
| |
Collapse
|
25
|
Mohammadghasemi F, Mahmoudi-Lafout F. Effect of graded doses of acetylsalicylic acid on sperm chromatin integrity and maturity of germinal epithelium in adult male mouse. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2018. [DOI: 10.4103/2305-0500.241179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
26
|
Flow cytometric sex sorting affects CD4 membrane distribution and binding of exogenous DNA on bovine sperm cells. ZYGOTE 2017; 25:519-528. [PMID: 28701237 DOI: 10.1017/s0967199417000375] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Bovine sex-sorted sperm have been commercialized and successfully used for the production of transgenic embryos of the desired sex through the sperm-mediated gene transfer (SMGT) technique. However, sex-sorted sperm show a reduced ability to internalize exogenous DNA. The interaction between sperm cells and the exogenous DNA has been reported in other species to be a CD4-like molecule-dependent process. The flow cytometry-based sex-sorting process subjects the spermatozoa to different stresses causing changes in the cell membrane. The aim of this study was to elucidate the relationship between the redistribution of CD4-like molecules and binding of exogenous DNA to sex-sorted bovine sperm. In the first set of experiments, the membrane phospholipid disorder and the redistribution of the CD4 were evaluated. The second set of experiments was conducted to investigate the effect of CD4 redistribution on the mechanism of binding of exogenous DNA to sperm cells and the efficiency of lipofection in sex-sorted bovine sperm. Sex-sorting procedure increased the membrane phospholipid disorder and induced the redistribution of CD4-like molecules. Both X-sorted and Y-sorted sperm had decreased DNA bound to membrane in comparison with the unsorted sperm; however, the binding of the exogenous DNA was significantly increased with the addition of liposomes. Moreover, we demonstrated that the number of sperm-bound exogenous DNA was decreased when these cells were preincubated with anti-bovine CD4 monoclonal antibody, supporting our hypothesis that CD4-like molecules indeed play a crucial role in the process of exogenous DNA/bovine sperm cells interaction.
Collapse
|
27
|
Bucci D, Giaretta E, Merlo B, Iacono E, Spinaci M, Gadani B, Mari G, Tamanini C, Galeati G. Alkaline phosphatase added to capacitating medium enhances horse sperm-zona pellucida binding. Theriogenology 2017; 87:72-78. [DOI: 10.1016/j.theriogenology.2016.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 07/29/2016] [Accepted: 08/04/2016] [Indexed: 11/30/2022]
|
28
|
Sielhorst J, Hagen C, Behrendt D, Schuette B, Burger D, Martinsson G, Sieme H. Effect of Multiple Freezing of Stallion Semen on Sperm Quality and Fertility. J Equine Vet Sci 2016. [DOI: 10.1016/j.jevs.2016.01.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
29
|
Macías-García B, Rocha A, González-Fernández L. Extracellular calcium regulates protein tyrosine phosphorylation through calcium-sensing receptor (CaSR) in stallion sperm. Mol Reprod Dev 2016; 83:236-45. [DOI: 10.1002/mrd.22615] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 01/11/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Beatriz Macías-García
- CECA/ICETA: Centro de Estudos de Ciência Animal/Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto; University of Porto; Portugal
- ICBAS: Instituto de Ciências Biomédicas Abel Salazar; University of Porto; Portugal
| | - Antonio Rocha
- CECA/ICETA: Centro de Estudos de Ciência Animal/Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto; University of Porto; Portugal
- ICBAS: Instituto de Ciências Biomédicas Abel Salazar; University of Porto; Portugal
| | - Lauro González-Fernández
- CECA/ICETA: Centro de Estudos de Ciência Animal/Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto; University of Porto; Portugal
- ICBAS: Instituto de Ciências Biomédicas Abel Salazar; University of Porto; Portugal
| |
Collapse
|
30
|
González-Fernández L, Macedo S, Lopes JS, Rocha A, Macías-García B. Effect of Different Media and Protein Source on Equine Gametes: Potential Impact DuringIn VitroFertilization. Reprod Domest Anim 2015; 50:1039-46. [DOI: 10.1111/rda.12634] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 09/24/2015] [Indexed: 11/26/2022]
Affiliation(s)
- L González-Fernández
- CECA/ICETA - Animal Sciences Centre; University of Porto; Vairão Portugal
- ICBAS - Abel Salazar Biomedical Institute; University of Porto; Porto Portugal
| | - S Macedo
- ICBAS - Abel Salazar Biomedical Institute; University of Porto; Porto Portugal
| | - JS Lopes
- ICBAS - Abel Salazar Biomedical Institute; University of Porto; Porto Portugal
| | - A Rocha
- CECA/ICETA - Animal Sciences Centre; University of Porto; Vairão Portugal
- ICBAS - Abel Salazar Biomedical Institute; University of Porto; Porto Portugal
| | - B Macías-García
- CECA/ICETA - Animal Sciences Centre; University of Porto; Vairão Portugal
- ICBAS - Abel Salazar Biomedical Institute; University of Porto; Porto Portugal
| |
Collapse
|
31
|
Effect of different media additives on capacitation of frozen–thawed ram spermatozoa as a potential replacement for estrous sheep serum. Theriogenology 2015; 84:948-55. [DOI: 10.1016/j.theriogenology.2015.05.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 05/22/2015] [Accepted: 05/29/2015] [Indexed: 11/21/2022]
|
32
|
Papa PM, Papa FO, Oliveira LA, Guasti PN, Castilho C, Giometti IC. Different extenders in the cryopreservation of bovine epididymal spermatozoa. Anim Reprod Sci 2015; 161:58-63. [PMID: 26315896 DOI: 10.1016/j.anireprosci.2015.08.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 08/07/2015] [Accepted: 08/08/2015] [Indexed: 11/19/2022]
Abstract
The objective of this study was to evaluate the effects of two different egg yolk extenders incubated with or without Sperm Talp on the motility and plasma membrane integrity of cryopreserved bovine epididymal spermatozoa after freezing. Twenty-five testicles with epididymides from mature bulls were collected at the abattoir. Epididymal sperm recovery was performed by retrograde flushing using a skim milk-extender (Botu-Semen™). After recovery, sperm were incubated either without or with Sperm Talp and then submitted to centrifugation. For the freezing process, half of the testes were processed with Tris egg yolk extender, and half were processed with Botu-Bov™ egg yolk extender. Samples incubated in Sperm Talp exhibited better results than epididymal spermatozoa that were incubated without Sperm Talp (p<0.05). Both Botu-Bov™ and Tris could be utilised to freeze sperm from the bovine epididymides if the sperm were previously incubated with Sperm Talp. The extenders examined in this work did not differ in their effect on plasma membrane integrity after freezing.
Collapse
Affiliation(s)
- Patrícia M Papa
- Department of Animal Reproduction and Veterinary Radiology, School of Veterinary Medicine and Animal Science, UNESP, Botucatu, SP, 18610-970, Brazil.
| | - Frederico O Papa
- Department of Animal Reproduction and Veterinary Radiology, School of Veterinary Medicine and Animal Science, UNESP, Botucatu, SP, 18610-970, Brazil.
| | - Letícia A Oliveira
- Oeste Paulista University, UNOESTE, Presidente Prudente, SP 19.067-175, Brazil.
| | - Priscilla N Guasti
- Department of Animal Reproduction and Veterinary Radiology, School of Veterinary Medicine and Animal Science, UNESP, Botucatu, SP, 18610-970, Brazil.
| | - Caliê Castilho
- Oeste Paulista University, UNOESTE, Presidente Prudente, SP 19.067-175, Brazil.
| | | |
Collapse
|