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Arlt SP, Reichler IM, Herbel J, Schäfer-Somi S, Riege L, Leber J, Frehner B. Diagnostic tests in canine andrology - What do they really tell us about fertility? Theriogenology 2023; 196:150-156. [PMID: 36423509 DOI: 10.1016/j.theriogenology.2022.11.008] [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: 10/20/2022] [Accepted: 11/04/2022] [Indexed: 11/13/2022]
Abstract
Dog breeders often require breeding soundness evaluations which include andrological examinations of the genital organs, hormone measurements, and semen analyses. During the past decades, a considerable number of research results have been published, allowing diagnoses of specific andrological conditions and fertility assessment. For specific examinations, however, no standard procedures have been defined and for some parameters different reference ranges have been published. Therefore, examination results from different facilities are difficult to compare and profound conclusions regarding health and fertility of a male dog are not always possible. Conventional semen examination, however, is still useful in identifying deviations or no deviations from normality, especially if confounding factors are taken into account and if the exam is repeated in case of inconclusive findings. A standardization of examination procedures and reference ranges would help to harmonize the exchange of examination results and interpretation of the findings.
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Affiliation(s)
- Sebastian P Arlt
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland; Clinic for Animal Reproduction, Faculty of Veterinary Medicine, Freie Universität, Berlin, Germany.
| | - Iris M Reichler
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Johannes Herbel
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Sabine Schäfer-Somi
- Platform for Artificial Insemination and Embryo Transfer, University of Veterinary Medicine Vienna, Veterinärplatz 1, A-1210, Vienna, Austria
| | - Lisa Riege
- Clinic for Animal Reproduction, Faculty of Veterinary Medicine, Freie Universität, Berlin, Germany
| | - Johanna Leber
- Clinic for Animal Reproduction, Faculty of Veterinary Medicine, Freie Universität, Berlin, Germany
| | - Bianca Frehner
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
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2
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Assessment of an open-access CASA software for bovine and buffalo sperm motility analysis. Anim Reprod Sci 2022; 247:107089. [DOI: 10.1016/j.anireprosci.2022.107089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/23/2022] [Accepted: 10/04/2022] [Indexed: 11/21/2022]
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3
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Monteiro MS, Torres MA, Passarelli MDS, Martins MP, Ravagnani GM, Papa FO, Alvarenga MA, Dell'Aqua Júnior JA, Yasui GS, Martins SMMK, de Andrade AFC. Impact of cryopreservation protocols (one- and two-step) on boar semen quality at 5 °C and post-thawing. Anim Reprod Sci 2022; 247:107093. [DOI: 10.1016/j.anireprosci.2022.107093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 10/06/2022] [Accepted: 10/12/2022] [Indexed: 11/01/2022]
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4
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Fernández-López P, Garriga J, Casas I, Yeste M, Bartumeus F. Predicting fertility from sperm motility landscapes. Commun Biol 2022; 5:1027. [PMID: 36171267 PMCID: PMC9519750 DOI: 10.1038/s42003-022-03954-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 09/06/2022] [Indexed: 11/23/2022] Open
Abstract
Understanding the organisational principles of sperm motility has both evolutionary and applied impact. The emergence of computer aided systems in this field came with the promise of automated quantification and classification, potentially improving our understanding of the determinants of reproductive success. Yet, nowadays the relationship between sperm variability and fertility remains unclear. Here, we characterize pig sperm motility using t-SNE, an embedding method adequate to study behavioural variability. T-SNE reveals a hierarchical organization of sperm motility across ejaculates and individuals, enabling accurate fertility predictions by means of Bayesian logistic regression. Our results show that sperm motility features, like high-speed and straight-lined motion, correlate positively with fertility and are more relevant than other sources of variability. We propose the combined use of embedding methods with Bayesian inference frameworks in order to achieve a better understanding of the relationship between fertility and sperm motility in animals, including humans. Dimension reduction methods on porcine sperm motility landscapes reveal heterogeneity and hierarchy in sperm movement behavior and show high-speed and straight-lined motion as predictive features of fertility.
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Affiliation(s)
- Pol Fernández-López
- Theoretical and Computational Ecology Group, Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Cala Sant Francesc, 14, 17300, Blanes, Spain
| | - Joan Garriga
- Theoretical and Computational Ecology Group, Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Cala Sant Francesc, 14, 17300, Blanes, Spain
| | - Isabel Casas
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, 17003, Girona, Spain.,Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, 17003, Girona, Spain
| | - Marc Yeste
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, 17003, Girona, Spain.,Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, 17003, Girona, Spain.,Institució Catalana de Recerca i Estudis Avançats, ICREA, Passeig Lluís Companys, 23, 08010, Barcelona, Spain
| | - Frederic Bartumeus
- Institució Catalana de Recerca i Estudis Avançats, ICREA, Passeig Lluís Companys, 23, 08010, Barcelona, Spain. .,Centre de Recerca Ecològica i Aplicacions Forestals (CREAF), Cerdanyola del Vallès, 08193, Barcelona, Spain.
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5
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Tomás-Almenar C, de Mercado E. Optimization of the Thawing Protocol for Iberian Boar Sperm. Animals (Basel) 2022; 12:ani12192600. [PMID: 36230350 PMCID: PMC9558520 DOI: 10.3390/ani12192600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Limited attention is paid to sperm thawing protocols, and their study could be relevant to endangered species or breeds, especially for cryopreserved material present in the existing gene banks. The aim of this study was to determine the most optimal thawing protocol for Iberian boar sperm through testing different thawing rates and different modifications of the thawing extender. Based on the findings, the most optimal results were obtained thawing at 70 °C for 8 s with the inclusion of cyclodextrins loaded with cholesterol (CLC) in the extender, revealing the importance of adapting the thawing protocols. Abstract Thawing protocols have been barely studied, and their modifications may lead to a substantial improvement in post-thawing sperm quality, which could be of great relevance to existing sperm banks, such as those for Iberian pig breeds with varieties in danger of extinction. For that, the study aimed to evaluate different thawing rates and to evaluate modifications in the composition of the thawing extender (basic pH to 8–8.2, incorporation of cyclodextrins loaded with cholesterol [CLC] and the incorporation of ion chelators [EDTA and EGTA]). After thawing, overall sperm motility and kinematic parameters, acrosome status and sperm membrane integrity were evaluated. The most optimal results were obtained with the thawing rate reaching 70 °C for 8 s with the inclusion of 12.5 mg of CLC/500 × 106 spermatozoa in the thawing extender, which showed an improvement compared to the control at 70 °C. In conclusion, to adapt the thawing conditions may be relevant, especially for endangered species or breeds such as some varieties of Iberian pig, since this process could also be used in samples cryopreserved in gene banks.
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6
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van Son M, Våge DI, Skaugen M, Tremoen NH, Gaustad AH, Zeremichael TT, Myromslien FD, Grindflek E. Protein profiling of testicular tissue from boars with different levels of hyperactive sperm motility. Acta Vet Scand 2022; 64:21. [PMID: 36064611 PMCID: PMC9446748 DOI: 10.1186/s13028-022-00642-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 08/29/2022] [Indexed: 11/21/2022] Open
Abstract
Hyperactive sperm motility is important for successful fertilization. In the present study, a proteome profiling approach was performed to identify the differences between Landrace boars with different levels of hyperactive sperm motility in liquid extended semen. Two contrasts were studied: (i) high versus low levels of sperm hyperactivity at semen collection day and (ii) high versus low change in levels of sperm hyperactivity after 96 h semen storage. Testicular samples were analyzed on a Q Exactive mass spectrometer and more than 6000 proteins were identified in the 13 samples. The most significant differentially expressed proteins were mediator complex subunit 28 (MED28), cell division cycle 37 like 1 (CDC37L1), ubiquitin specific peptidase 10 (USP10), zinc finger FYVE-type containing 26 (ZFYVE26), protein kinase C delta (PRKCD), actinin alpha 4 (ACTN4), N(alpha)-acetyltransferase 30 (NAA30), C1q domain-containing (LOC110258309) and uncharacterized LOC100512926. Of the differentially expressed proteins, 11 have previously been identified as differentially expressed at the corresponding mRNA transcript level using the same samples and contrasts. These include sphingosine kinase 1 isoform 2 (SPHK1), serine and arginine rich splicing factor 1 (SRSF1), and tubulin gamma-1 (TUBG1) which are involved in the acrosome reaction and sperm motility. A mass spectrometry approach was applied to investigate the protein profiles of boars with different levels of hyperactive sperm motility. This study identified several proteins previously shown to be involved in sperm motility and quality, but also proteins with no known function for sperm motility. Candidates that are differentially expressed on both mRNA and protein levels are especially relevant as biological markers of semen quality.
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Affiliation(s)
| | - Dag Inge Våge
- Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Centre for Integrative Genetics (CIGENE), Norwegian University of Life Sciences, 1432, Ås, Norway
| | - Morten Skaugen
- Faculty of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, 1432, Ås, Norway
| | - Nina Hårdnes Tremoen
- Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Centre for Integrative Genetics (CIGENE), Norwegian University of Life Sciences, 1432, Ås, Norway.,Department of Biotechnology, Inland Norway University of Applied Sciences, 2318, Hamar, Norway
| | - Ann Helen Gaustad
- Norsvin, Storhamargata 44, 2317, Hamar, Norway.,Department of Biotechnology, Inland Norway University of Applied Sciences, 2318, Hamar, Norway
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7
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Serafini S, O'Flaherty C. Redox Regulation to Modulate Phosphorylation Events in Human Spermatozoa. Antioxid Redox Signal 2022; 37:437-450. [PMID: 34714121 DOI: 10.1089/ars.2021.0117] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Significance: Spermatozoa are complex and compartmentalized cells that undergo capacitation, a series of biochemical and morphological changes to acquire the ability to fertilize oocytes. Reactive oxygen species (ROS) have a prominent dual role in capacitation. At physiological levels, ROS regulate numerous cellular processes, including increases of cyclic adenosine monophosphate, calcium, and activation of phosphorylation events needed for capacitation. On the contrary, at high concentrations that do not impair sperm viability, ROS can cause loss of motility and inhibition of capacitation. Higher ROS concentrations promote oxidation of lipids, proteins, and DNA leading to cell death, and these damages have been associated with male infertility. Critical Issues: When incubated under specific conditions, spermatozoa can produce low and controlled amounts of ROS that are not harmful but instead regulate numerous cellular processes, including the phosphorylation of tyrosine, serine, and threonine residues in critical proteins needed for sperm capacitation. Here, we outline the complex redox signaling in human spermatozoa needed to achieve fertility and the role of ROS as physiological mediators that trigger phosphorylation cascades. Moreover, we illustrate the importance of various phosphoproteins in spermatozoa capacitation, viability, and hyperactive motility. Future Directions: Further studies to elucidate the different phosphorylation players during sperm capacitation and acrosome reaction (the regulated exocytotic event that releases proteolytic enzymes allowing the spermatozoon to penetrate the zona pellucida and fertilize the oocyte) are essential to understand how the spermatozoon acquires the fertilizing ability to fertilize the oocyte. This knowledge will serve to develop novel diagnostic tools and therapy for male infertility. Antioxid. Redox Signal. 37, 437-450.
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Affiliation(s)
- Steven Serafini
- Department of Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montréal, Canada
| | - Cristian O'Flaherty
- Department of Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montréal, Canada.,Urology Division, Department of Surgery, Faculty of Medicine, McGill University, Montréal, Canada.,Department of Anatomy and Cell Biology, Faculty of Medicine, McGill University, Montréal, Canada.,The Research Institute, McGill University Health Centre, Montréal, Canada
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8
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Balogun KB, Stewart KR. Effects of air exposure and agitation on quality of stored boar semen samples. Reprod Domest Anim 2021; 56:1200-1208. [PMID: 34105844 DOI: 10.1111/rda.13975] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/20/2021] [Indexed: 11/28/2022]
Abstract
The objective of this study was to investigate the effects of semen volume, air contact inside semen dose tubes, daily agitation of semen doses and extender type on semen quality, thermo-resistance and bacteria growth in extended boar semen doses preserved over 7 days of liquid storage. Ejaculates from 4 proven terminal cross-bred boars were collected using the gloved-hand technique for 4 weeks and used in the 3 × 2 × 2 factorial study. The effects of treatment (CON: 80 ml doses sealed at the top of the tube; 40HIGH: 40 ml doses sealed at top of tube, and 40LOW: 40 ml doses sealed at top of the liquid), agitation (agitated versus not agitated) and extender type (long-term versus short-term) were investigated on semen quality, thermo-resistance and bacteria growth in boar semen doses. The results of the study revealed that motility (p = .031) and viability (p = .041) in 40HIGH were lower than CON. pH (p < .001) was higher in 40HIGH compared with CON and 40LOW. Agitation did not impact motility (p = .581), progressive motility (p = .870), viability (p = .509) or morphology (p = .970), while long-term extender maintained higher motility (p = .002), progressive motility (p = .036), viability (p < .001) and normal acrosome (p < .001) than a short-term extender. VAP (p = .039) of 40HIGH was lower than CON in a thermo-resistance test. Neither treatment (p > .798, .766) nor agitation (p > .396, .476) impacted bacterial growth in this study. In conclusion, air contact negatively impacts boar semen pH and consequently sperm motility. Semen doses prepared with 80 or 40 ml volumes of extended boar semen with minimal air contact in the tubes yield more desirable semen quality and agitating boar semen doses daily does not have negative or positive effects on boar semen quality.
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Affiliation(s)
| | - Kara Roski Stewart
- Department of Animal Sciences, Purdue University, West Lafayette, IN, USA
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9
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Daigneault BW, Miller DJ. Transient receptor potential polycystin-2 (TRPP2) regulates motility and intracellular calcium of porcine sperm. Andrologia 2021; 53:e14124. [PMID: 34042198 DOI: 10.1111/and.14124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/01/2021] [Accepted: 05/01/2021] [Indexed: 12/17/2022] Open
Abstract
Polycystin-2, also known as transient receptor potential polycystin-2 (TRPP2), is a membrane protein that regulates calcium homeostasis in renal epithelial cells. Mutations in PKD2, the gene encoding human TRPP2, cause enlarged cystic kidneys and contribute to polycystic kidney disease (PKD). Male Drosophila melanogaster with mutations in amo, the homolog of PKD2, display a mild decrease in sperm motility but have a drastic reduction in fertility due to failed sperm migration and storage within the female tract. Although TRPP2 has critical roles for Drosophila sperm function, the protein has not been described in mammalian sperm. Herein, we report the localization of TRPP2 in porcine sperm and identify functions of TRPP2 in regulating intracellular Ca2+ and motility. Porcine sperm treated with an antibody to TRPP2 in capacitating medium had reduced average path velocity and curvilinear velocity (p < .05). Blocking TRPP2 also increased sperm tail beat-cross frequency (p < .05). After 90 min of capacitation, sperm incubated with TRPP2 antibody had decreased intracellular Ca2+ concentration compared to controls (p < .05), consistent with TRPP2 function as a plasma membrane cation channel. This is the first report that mammalian sperm contain TRPP2, which appears to regulate intracellular Ca2+ and motility patterns in porcine sperm.
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Affiliation(s)
- Bradford W Daigneault
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA.,Department of Animal Sciences, University of Illinois, Urbana-Champaign, IL, USA
| | - David J Miller
- Department of Animal Sciences, University of Illinois, Urbana-Champaign, IL, USA
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10
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de Mercado E, Tomás-Almenar C, Gómez-Izquierdo E. Improvement of the motility of boar sperm after cryopreservation. Anim Reprod Sci 2020; 222:106610. [PMID: 33002661 DOI: 10.1016/j.anireprosci.2020.106610] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/21/2020] [Accepted: 09/21/2020] [Indexed: 11/25/2022]
Abstract
After the sperm cryopreservation process, there frequently is a marked decrease in sperm motility, however, this loss of motility could be avoided or reduced by modifying the thawing extender. The aim of conducting this study was to evaluate treatments resulting in differences in pH of the thawing extender on post-thawing sperm quality, especially motility. The associated effects were evaluated of the thawing extender pH when there were pH values of 7, 8 and 9 on values for sperm viability, acrosome integrity, motility and kinematic variables. To evaluate pH effects of the thawing extender on sperm motility, the procedures for evaluating the sperm variables were conducted with or without inclusion of caffeine in the extender. In addition, effects of thawing extender pH on the sperm subpopulations were analyzed. The results indicated that by increasing the pH of thawing extender to 9, sperm viability and acrosome status were not affected, and motility was markedly greater with there being similar values when there was a pH of greater alkalinity and pH 7 when caffeine was included for conducting the evaluations. Furthermore, for values of kinematic variables and sperm subpopulations, when there was a pH of 8 of thawing extender, sperm motility was maintained to a greater extent as storage duration advanced and the proportions of different sperm populations were also maintained during storage. In conclusion, when there was use of the thawing extender at pH 8, there was enhanced post-thawing sperm motility and preservation of motility as storage time advanced.
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Affiliation(s)
- Eduardo de Mercado
- Subdirection of Research and Technology, Agro-Technological Institute of Castilla y León, Consejería de Agricultura y Ganadería, Ctra Riaza-Toro s/n, 40353 Hontalbilla, Segovia, Spain.
| | - Cristina Tomás-Almenar
- Subdirection of Research and Technology, Agro-Technological Institute of Castilla y León, Consejería de Agricultura y Ganadería, Ctra Riaza-Toro s/n, 40353 Hontalbilla, Segovia, Spain
| | - Emilio Gómez-Izquierdo
- Subdirection of Research and Technology, Agro-Technological Institute of Castilla y León, Consejería de Agricultura y Ganadería, Ctra Riaza-Toro s/n, 40353 Hontalbilla, Segovia, Spain
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11
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The Presence of Seminal Plasma during Liquid Storage of Pig Spermatozoa at 17 °C Modulates Their Ability to Elicit In Vitro Capacitation and Trigger Acrosomal Exocytosis. Int J Mol Sci 2020; 21:ijms21124520. [PMID: 32630462 PMCID: PMC7350249 DOI: 10.3390/ijms21124520] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/24/2020] [Accepted: 06/24/2020] [Indexed: 12/14/2022] Open
Abstract
Although seminal plasma is essential to maintain sperm integrity and function, it is diluted/removed prior to liquid storage and cryopreservation in most mammalian species. This study sought to evaluate, using the pig as a model, whether storing semen in the presence of seminal plasma affects the sperm ability to elicit in vitro capacitation and acrosomal exocytosis. Upon collection, seminal plasma was separated from sperm samples, which were diluted in a commercial extender, added with seminal plasma (15% or 30%), and stored at 17 °C for 48 or 72 h. Sperm cells were subsequently exposed to capacitating medium for 4 h, and then added with progesterone to induce acrosomal exocytosis. Sperm motility, acrosome integrity, membrane lipid disorder, intracellular Ca2+ levels, mitochondrial activity, and tyrosine phosphorylation levels of glycogen synthase kinase-3 (GSK3)α/β were determined after 0, 2, and 4 h of incubation, and after 5, 30, and 60 min of progesterone addition. Results showed that storing sperm at 17 °C with 15% or 30% seminal plasma led to reduced percentages of viable spermatozoa exhibiting an exocytosed acrosome, mitochondrial membrane potential, intracellular Ca2+ levels stained by Fluo3, and tyrosine phosphorylation levels of GSK3α/β after in vitro capacitation and progesterone-induced acrosomal exocytosis. Therefore, the direct contact between spermatozoa and seminal plasma during liquid storage at 17 °C modulated their ability to elicit in vitro capacitation and undergo acrosomal exocytosis, via signal transduction pathways involving Ca2+ and Tyr phosphorylation of GSK3α/β. Further research is required to address whether such a modulating effect has any impact upon sperm fertilizing ability.
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12
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van Son M, Tremoen NH, Gaustad AH, Våge DI, Zeremichael TT, Myromslien FD, Grindflek E. Transcriptome profiling of porcine testis tissue reveals genes related to sperm hyperactive motility. BMC Vet Res 2020; 16:161. [PMID: 32456687 PMCID: PMC7249385 DOI: 10.1186/s12917-020-02373-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 05/13/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Sperm hyperactive motility has previously been shown to influence litter size in pigs, but little is known about the underlying biological mechanisms. The aim of this study was to use RNA sequencing to investigate gene expression differences in testis tissue from Landrace and Duroc boars with high and low levels of sperm hyperactive motility. Boars with divergent phenotypes were selected based on their sperm hyperactivity values at the day of ejaculation (day 0) (contrasts (i) and (ii) for Landrace and Duroc, respectively) and on their change in hyperactivity between day 0 and after 96 h liquid storage at 18 °C (contrast (iii)). RESULTS RNA sequencing was used to measure gene expression in testis. In Landrace boars, 3219 genes were differentially expressed for contrast (i), whereas 102 genes were differentially expressed for contrast (iii). Forty-one differentially expressed genes were identified in both contrasts, suggesting a functional role of these genes in hyperactivity regardless of storage. Zinc finger DNLZ was the most up-regulated gene in contrasts (i) and (iii), whereas the most significant differentially expressed gene for the two contrasts were ADP ribosylation factor ARFGAP1 and solute carrier SLC40A1, respectively. For Duroc (contrast (ii)), the clustering of boars based on their gene expression data did not reflect their difference in sperm hyperactivity phenotypes. No results were therefore obtained for this breed. A case-control analysis of variants identified in the Landrace RNA sequencing data showed that SNPs in NEU3, CHRDL2 and HMCN1 might be important for sperm hyperactivity. CONCLUSIONS Differentially expressed genes were identified in Landrace boars with high and low levels of sperm hyperactivity at the day of ejaculate collection and high and low change in hyperactivity after 96 h of sperm storage. The results point towards important candidate genes, biochemical pathways and sequence variants underlying sperm hyperactivity in pigs.
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Affiliation(s)
| | - Nina Hårdnes Tremoen
- Department of Biotechnology, Inland Norway University of Applied Sciences, 2318 Hamar, Norway
- Centre for Integrative Genetics (CIGENE), Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, 1432 Ås, Norway
| | - Ann Helen Gaustad
- Norsvin SA, 2317 Hamar, Norway
- Department of Biotechnology, Inland Norway University of Applied Sciences, 2318 Hamar, Norway
| | - Dag Inge Våge
- Centre for Integrative Genetics (CIGENE), Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, 1432 Ås, Norway
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13
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Bucci D, Spinaci M, Galeati G, Tamanini C. Different approaches for assessing sperm function. Anim Reprod 2020; 16:72-80. [PMID: 33299480 PMCID: PMC7720929 DOI: 10.21451/1984-3143-ar2018-122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Different approaches can be used to assess sperm function in different conditions, i.e. sperm storage, freezing-thawing or activation by induction of capacitation and acrosome reaction. In this review we will focus on the assays routinely performed in our laboratories, giving a literature support to critically analyse different approaches. In fact, researchers usually tend to look for the "one shot" parameter that could explain itself a specific process; it is our conviction that a multiparametric approach is still more valid, as some changes in sperm function are very complex and could be explained only by operating in different ways. Sperm motility, the most evident sperm characteristic, should be assessed by computer-aided sperm analysers that permit an objective evaluation of the motility and its kinematic parameters. Commercial and open source instruments are available and could be profitably used together with specific statistical approaches. The use of microscopy, and particularly fluorescent microscopy, could be a very useful tool to assess different parameters in sperm cells both by fluorophores that give indication of a determined function, and by immunolocalization of proteins, that permits the discover of new features or to explain particular sperm functions. The same substrates could be used also in flow cytometry: the difference is that it permits to study wider sperm populations (and their sub-population distribution). Flow cytometry is undergoing a very wide use in spermatology and technical and experimental rigor is needed to obtain reliable results. Metabolic assessment of sperm features, particularly energetic supply, ATP formation and other enzyme activities, could represent a very important challenge to acquire new information and complete/integrate those derived from other techniques. Finally, functional assays such as oocyte binding and in vitro fertilization, represent a very strong tool to assess sperm function in vitro, as they could evidence the functional intactness of some pathways.
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Affiliation(s)
- Diego Bucci
- Department of Veterinary Medical Sciences, Via Tolara di Sopra, 50 40064 Ozzano dell'Emilia, Bologna, Italy
| | - Marcella Spinaci
- Department of Veterinary Medical Sciences, Via Tolara di Sopra, 50 40064 Ozzano dell'Emilia, Bologna, Italy
| | - Giovanna Galeati
- Department of Veterinary Medical Sciences, Via Tolara di Sopra, 50 40064 Ozzano dell'Emilia, Bologna, Italy
| | - Carlo Tamanini
- Department of Veterinary Medical Sciences, Via Tolara di Sopra, 50 40064 Ozzano dell'Emilia, Bologna, Italy
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14
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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.
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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
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15
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Soriano-Úbeda C, Romero-Aguirregomezcorta J, Matás C, Visconti PE, García-Vázquez FA. Manipulation of bicarbonate concentration in sperm capacitation media improvesin vitro fertilisation output in porcine species. J Anim Sci Biotechnol 2019; 10:19. [PMID: 30899459 PMCID: PMC6410524 DOI: 10.1186/s40104-019-0324-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 01/17/2019] [Indexed: 05/30/2023] Open
Abstract
Background The in vivo concentration of bicarbonate (HCO3 -), one of the essential sperm capacitating effectors, varies greatly in the different environments sperm go through from cauda epididymis to the fertilisation site. On the contrary, porcine in vitro sperm capacitation and fertilisation media usually contains a standard concentration of 25 mmol/L, and one of the main problems presented is the unacceptable high incidence of polyspermy. This work hypothesised that by modifying the HCO3 - concentration of the medium, the output of in vitro sperm capacitation and fertilisation could be increased. Results Once exposed to the capacitation medium, the intracellular pH (pHi) of spermatozoa increased immediately even at low concentrations of HCO3 -, but only extracellular concentrations of and above 15 mmol/L increased the substrates protein kinase A phosphorylation (pPKAs). Although with a significant delay, 15 mmol/L of HCO3 - stimulated sperm linear motility and increased other late events in capacitation such as tyrosine phosphorylation (Tyr-P) to levels similar to those obtained with 25 mmol/L. This information allowed the establishment of a new in vitro fertilisation (IVF) system based on the optimization of HCO3 - concentration to 15 mmol/L, which led to a 25.3% increment of the viable zygotes (8.6% in the standard system vs. 33.9%). Conclusions Optimising HCO3 - concentrations allows for establishing an IVF method that significantly reduced porcine polyspermy and increased the production of viable zygotes. A concentration of 15 mmol/L of HCO3 - in the medium is sufficient to trigger the in vitro sperm capacitation and increase the fertilisation efficiency in porcine.
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Affiliation(s)
- Cristina Soriano-Úbeda
- 1Department of Physiology, Faculty of Veterinary Science, International Excellence Campus for Higher Education and Research "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain.,2Institute for Biomedical Research of Murcia (IMIB-Arrixaca), Murcia, Spain
| | - Jon Romero-Aguirregomezcorta
- 3Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, Leioa, Bizkaia Spain
| | - Carmen Matás
- 1Department of Physiology, Faculty of Veterinary Science, International Excellence Campus for Higher Education and Research "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain.,2Institute for Biomedical Research of Murcia (IMIB-Arrixaca), Murcia, Spain
| | - Pablo E Visconti
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, MA USA
| | - Francisco A García-Vázquez
- 1Department of Physiology, Faculty of Veterinary Science, International Excellence Campus for Higher Education and Research "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain.,2Institute for Biomedical Research of Murcia (IMIB-Arrixaca), Murcia, Spain
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16
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The ideal holding time for boar semen is 24 h at 17 °C prior to short-cryopreservation protocols. Cryobiology 2019; 86:58-64. [DOI: 10.1016/j.cryobiol.2018.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 11/20/2018] [Accepted: 12/13/2018] [Indexed: 02/04/2023]
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17
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Valverde A, Madrigal-Valverde M, Lotz J, Bompart D, Soler C. Effect of video capture time on sperm kinematic parameters in breeding boars. Livest Sci 2019. [DOI: 10.1016/j.livsci.2018.12.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Harayama H. Flagellar hyperactivation of bull and boar spermatozoa. Reprod Med Biol 2018; 17:442-448. [PMID: 30377397 PMCID: PMC6194283 DOI: 10.1002/rmb2.12227] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 07/26/2018] [Accepted: 07/31/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND In mammals, flagellar hyperactivation is indispensable to sperm fertilization with oocytes in vivo, although there are species differences in regulatory mechanisms for this event. In this study, I reviewed researches regarding hyperactivation of bull and boar spermatozoa, in comparison with those of spermatozoa from other species. METHODS Recent publications regarding sperm hyperactivation were collected and summarized. RESULTS MAIN FINDINGS In bull and boar spermatozoa, there are two types of hyperactivation "full-type hyperactivation and nonfull-type hyperactivation" which are equivalent to anti-hock hyperactivation and pro-hock hyperactivation of mouse spermatozoa, respectively, on the basis of the flagellar parts exhibiting asymmetrical beating. Full-type hyperactivation is initiated in response to a rapid increase of cytoplasmic Ca2+ in the connecting/middle and principal pieces by the mobilization of this divalent ion from extracellular space and internal store through cation channels. Regulatory molecules for the increase of cytoplasmic Ca2+ in the connecting/middle pieces are probably different from those in the principal pieces. CONCLUSION I have proposed a hypothesis on the regulation of full-type hyperactivation by the distinct signaling cascades leading to the increase in cytoplasmic Ca2+ between the connecting/middle and principal pieces of bull and boar spermatozoa.
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Affiliation(s)
- Hiroshi Harayama
- Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural ScienceKobe UniversityKobeJapan
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19
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Combined effects of resveratrol and epigallocatechin-3-gallate on post thaw boar sperm and IVF parameters. Theriogenology 2018; 117:16-25. [DOI: 10.1016/j.theriogenology.2018.05.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 04/27/2018] [Accepted: 05/15/2018] [Indexed: 12/28/2022]
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20
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Leal DF, Torres MA, Ravagnani GM, Martins SMMK, Meirelles FV, de Andrade AFC. Absence of seminal plasma from sperm-rich fraction decreases boar sperm quality characteristics during the course of liquid storage. Anim Reprod Sci 2018; 198:20-26. [PMID: 30219377 DOI: 10.1016/j.anireprosci.2018.08.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 07/28/2018] [Accepted: 08/24/2018] [Indexed: 11/30/2022]
Abstract
Seminal plasma (SP), the fluid that surrounds the sperm cells, is known to exert substantial influence on sperm physiology. The SP has a pivotal role in sperm function in vivo, and due to its components, it functions in an ambiguous manner in vitro, simultaneously possessing deleterious and beneficial effects. This experiment aimed to describe the differences between the presence or absence of SP from the sperm-rich fraction on some spermatozoa characteristics (kinetics, plasma and acrosome membrane integrity, lipid peroxidation and capacitation-like changes). Furthermore, this experiment focused on distinguishing the effects of SP on the variables evaluated from the effects of centrifugation during SP removal. Total and progressive sperm motility, as well as integrity of plasma and acrosome membranes, were less (P < 0.05) in the absence of SP. Membrane lipid peroxidation (P < 0.05) and sperm membrane stability (P < 0.05) did not differ among treatments. The SP from the sperm-rich fraction is important for the maintenance of adequate structural and functional characteristics of extended liquid boar semen and should be present in seminal doses throughout storage. Furthermore, the detrimental effect on the variables evaluated was caused solely by the absence of SP and not by the process of removal through centrifugation at 500 x g for 10 min.
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Affiliation(s)
- D F Leal
- Swine Research Center, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, 13635-900, Brazil
| | - M A Torres
- Swine Research Center, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, 13635-900, Brazil
| | - G M Ravagnani
- Swine Research Center, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, 13635-900, Brazil
| | - S M M K Martins
- Swine Research Center, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, 13635-900, Brazil
| | - F V Meirelles
- Department of Veterinary Medicine, School of Animal Sciences and Food Engineering, University of São Paulo, Pirassununga, São Paulo, 13635-900, Brazil
| | - A F C de Andrade
- Swine Research Center, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, 13635-900, Brazil.
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21
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Missio D, Folchini NP, Leivas FG, Pavin CIIUM, Pinto HF, Cibin FWS, Brum DDS. Reduction in Percoll volume increases recovery rate of sex-sorted semen of bulls without affecting sperm quality and early embryonic development. Anim Reprod Sci 2018. [DOI: 10.1016/j.anireprosci.2018.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Tremoen NH, Gaustad AH, Andersen-Ranberg I, van Son M, Zeremichael TT, Frydenlund K, Grindflek E, Våge DI, Myromslien FD. Relationship between sperm motility characteristics and ATP concentrations, and association with fertility in two different pig breeds. Anim Reprod Sci 2018; 193:226-234. [PMID: 29703418 DOI: 10.1016/j.anireprosci.2018.04.075] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/09/2018] [Accepted: 04/13/2018] [Indexed: 01/15/2023]
Abstract
Boar fertility has a major impact on overall pig reproductive efficiency. Using accurate and objective in vitro sperm variables for predicting in vivo fertility from a single ejaculate, however, is challenging. Motility is the most widely used indicator of sperm quality, and a computer assisted sperm analysis (CASA) system is now available for objective assessment of sperm motility characteristics. In this study sperm motility characteristics and semen ATP concentrations were investigated and the effect of both were evaluated on total number of piglets born (TNB) when Norwegian Landrace (NL) and Norwegian Duroc (ND) boar semen was used for AI. In addition, breed differences for semen storage capacity were investigated. The results from CASA analysis indicated there were differences between NL and ND sperm motility variables. The percentage of motile sperm cells decreased in both NL (P = 0.01) and ND (P < 0.0001) during storage. A large proportion of sperm cells with a hyperactive motility pattern were detected in ND semen on the day of collection, with no significant changes as a result of storage. Inconsistent with this finding, there was greater degree of hyper-activation in sperm motility pattern for NL because of semen storage. There was a significant decrease in semen ATP concentration during storage (P < 0.0001) in both breeds. The linearity of sperm movement at the day of collection and the wobble after storage influenced TNB in NL, while the percentage of motile cells, curvilinear velocity and lateral head amplitude on the day of semen collection and linearity after storage influenced TNB in ND.
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Affiliation(s)
- Nina Hårdnes Tremoen
- Department of Biotechnology, Inland Norway University of Applied Sciences, NO-2318, Hamar, Norway; Centre for Integrative Genetics (CIGENE), Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, NO-1432, Ås, Norway
| | - Ann Helen Gaustad
- Department of Biotechnology, Inland Norway University of Applied Sciences, NO-2318, Hamar, Norway; Topigs Norsvin, Storhamargata 44, NO-2317, Hamar, Norway
| | | | - Maren van Son
- Topigs Norsvin, Storhamargata 44, NO-2317, Hamar, Norway
| | | | - Kirsten Frydenlund
- Department of Biotechnology, Inland Norway University of Applied Sciences, NO-2318, Hamar, Norway
| | - Eli Grindflek
- Topigs Norsvin, Storhamargata 44, NO-2317, Hamar, Norway
| | - Dag Inge Våge
- Centre for Integrative Genetics (CIGENE), Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, NO-1432, Ås, Norway
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23
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Katoh Y, Tamba M, Matsuda M, Kikuchi K, Okamura N. Decrease in the cytosolic NADP +-dependent isocitrate dehydrogenase activity through porcine sperm capacitation. Biochem Biophys Res Commun 2018; 497:374-380. [PMID: 29448107 DOI: 10.1016/j.bbrc.2018.02.087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 02/08/2018] [Indexed: 11/16/2022]
Abstract
In order to understand the molecular mechanisms involved in the sperm capacitation, we have identified the proteins tyrosine-phosphorylated during the capacitation especially in conjunction with the regulation of the levels of reactive oxygen species (ROS) in sperm. In the present study, the effects of the tyrosine phosphorylation of cytosolic NADP+-dependent isocitrate dehydrogenase (IDPc) on its catalytic activity and on the levels of ROS in sperm have been studied. The tyrosine phosphorylated IDPc showed a significantly lowered enzymatic activity. The immunocytochemical analyses using the highly specific antisera against IDPc revealed that IDPc was mainly localized to the principal piece of the porcine sperm flagellum. As IDPc is one of the major NADPH regenerating enzymes in porcine sperm, it is strongly suggested that the decrease in IDPc activity is involved in the increased levels of ROS, which results in the induction of hyperactivated flagellar movement and capacitation.
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Affiliation(s)
- Yuki Katoh
- Division of Cellular Signaling, Institute for Advanced Medical Research, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan; Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Michiko Tamba
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Manabu Matsuda
- Division of Basic Medical Sciences, Kindai University Faculty of Medicine, Osaka, Sayama, 589-8511, Japan
| | - Kazuhiro Kikuchi
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, 305-8602, Japan
| | - Naomichi Okamura
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
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24
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Martin-Hidalgo D, Gil MC, Hurtado de Llera A, Perez CJ, Bragado MJ, Garcia-Marin LJ. Boar sperm hyperactivated motility is induced by temperature via an intracellular calcium-dependent pathway. Reprod Fertil Dev 2018; 30:1462-1471. [DOI: 10.1071/rd17549] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 04/12/2018] [Indexed: 01/26/2023] Open
Abstract
Herein we describe a new protocol to induce boar sperm hypermotility: temperature-induced hypermotility (TIH). Briefly, spermatozoa stored at 17°C in a calcium-free Tyrode’s basal medium (containing EGTA) were exposed to increased temperature by incubation at 38.5°C. Hypermotility induced by the calcium ionophore A23187 was used as a control (calcium ionophore-induced hyperactivity (CIIH)). The increase in temperature led to an increase in the percentage of hypermotile spermatozoa. When the slope of the temperature increase is near zero, sperm hyperactivity becomes a more progressive movement. Motility parameters of sperm hyperactivation induced by TIH were different from those following CIIH. Cluster analysis revealed that these two populations of hyperactivated spermatozoa are different. TIH is independent of extracellular Ca2+ but dependent on intracellular Ca2+ release. Moreover, TIH is unaffected by protein kinase A (PKA) inhibition, whereas CIIH is reduced by half in the presence of a PKA inhibitor. In conclusion, we have demonstrated that: (1) a temperature increase in boar spermatozoa is a stimulus that can induce a hyperactive population, which is differs from the hyperactive sperm population induced by calcium ionophore; (2) the temperature increase in spermatozoa triggers the release of Ca2+ from intracellular stores; (3) extracellular calcium is not required for TIH; and (4) TIH in boar spermatozoa is independent of PKA activity.
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25
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Otsuka N, Harayama H. Characterization of extracellular Ca 2+ -dependent full-type hyperactivation in ejaculated boar spermatozoa preincubated with a cAMP analog. Mol Reprod Dev 2017; 84:1203-1217. [PMID: 28981180 DOI: 10.1002/mrd.22921] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/19/2017] [Accepted: 09/21/2017] [Indexed: 12/20/2022]
Abstract
Ejaculated boar spermatozoa exhibit two types of hyperactivation: full and non-full. Full-type hyperactivation is characterized by the asymmetrical bending of the entire middle piece-principal piece and a twisting/figure-eight-like trajectory, and can be induced by simple incubation with CaCl2 after preincubation with a cAMP analog (Sp-5,6-dichloro-1-β-D-ribofuranosyl-benzimidazole-3',5'-cyclic monophosphorothioate [cBiMPS]). Here, we compared the sperm flagellar motility after treatments with elevators of [Ca2+ ]i (cBiMPS/CaCl2 , thimerosal, procaine, and 4-aminopyridine) to characterize the regulatory mechanism of extracellular Ca2+ -dependent, full-type hyperactivation in ejaculated boar spermatozoa, and examined the possible involvement of Transient receptor potential cation channel subfamily C member 3 (TRPC3) in this event using the specific inhibitor Pyr3. Full-type hyperactivation was induced by a 60-min incubation with CaCl2 following a 180-min preincubation with cBiMPS but without Ca2+ . Thimerosal-treated spermatozoa exhibited full-type hyperactivation in a manner independent of extracellular Ca2+ ; conversely, this was not observed in procaine- or 4-aminopyridine-treated spermatozoa. A 20-min treatment with Pyr3 between preincubation with cBiMPS and incubation with CaCl2 , significantly suppressed the normal phenotype. These observations indicated that mechanisms underlying full-type hyperactivation in spermatozoa incubated with CaCl2 after preincubation with cBiMPS are different from those in the thimerosal-treated spermatozoa. Furthermore, indirect immunofluorescence localized TRPC3 in the upper segment of the middle piece, which bends asymmetrically during full-type hyperactivation but not in non-full-type hyperactivation, suggesting that TRPC3 may be involved in the extracellular Ca2+ -dependent full-type hyperactivation in ejaculated boar spermatozoa.
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Affiliation(s)
- Nagisa Otsuka
- Laboratory of Reproductive Biology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
| | - Hiroshi Harayama
- Laboratory of Reproductive Biology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
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26
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Ramaraju GA, Teppala S, Prathigudupu K, Kalagara M, Thota S, Kota M, Cheemakurthi R. Association between obesity and sperm quality. Andrologia 2017; 50. [DOI: 10.1111/and.12888] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2017] [Indexed: 12/21/2022] Open
Affiliation(s)
- G. A. Ramaraju
- Center for Assisted Reproduction; Krishna IVF Clinic; Visakhapatnam India
| | - S. Teppala
- Center for Assisted Reproduction; Krishna IVF Clinic; Visakhapatnam India
| | - K. Prathigudupu
- Center for Assisted Reproduction; Krishna IVF Clinic; Visakhapatnam India
| | - M. Kalagara
- Center for Assisted Reproduction; Krishna IVF Clinic; Visakhapatnam India
| | - S. Thota
- Center for Assisted Reproduction; Krishna IVF Clinic; Visakhapatnam India
| | - M. Kota
- Center for Assisted Reproduction; Krishna IVF Clinic; Visakhapatnam India
| | - R. Cheemakurthi
- Center for Assisted Reproduction; Krishna IVF Clinic; Visakhapatnam India
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27
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Grieblová A, Pintus E, Ros-Santaella JL. Integrity of head and tail plasmalemma is associated with different kinetic variables in boar sperm. Anim Reprod Sci 2017; 184:218-227. [DOI: 10.1016/j.anireprosci.2017.07.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 07/16/2017] [Accepted: 07/27/2017] [Indexed: 10/19/2022]
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Ros-Santaella JL, Pintus E. Rooibos (Aspalathus linearis) extract enhances boar sperm velocity up to 96 hours of semen storage. PLoS One 2017; 12:e0183682. [PMID: 28837611 PMCID: PMC5570286 DOI: 10.1371/journal.pone.0183682] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 08/09/2017] [Indexed: 02/04/2023] Open
Abstract
Rooibos (Aspalathus linearis) is a native shrub from South African fynbos and has become very popular in the last decades for its antioxidant and medicinal attributes. Several studies have shown its beneficial properties in numerous cell lines, but to date, the in vitro effects of rooibos extract on sperm cells are still unknown. In this study, boar semen was supplemented with four concentrations both of fermented and unfermented rooibos extracts during 96 h of liquid storage at 17°C. The effects of rooibos extracts on sperm velocity, membrane integrity, and acrosomal status were evaluated at 2 h, 48 h, and 96 h of semen storage. Overall our results indicate that rooibos extract enhances sperm velocity, protects the acrosome structure, and tends to preserve the membrane integrity during semen storage. Although the unfermented rooibos showed higher total polyphenol content and total antioxidant capacity than the fermented one, the latter had better effects on sperm velocity leading to, for instance, an increase of 30% in the rectilinear velocity (VSL) at 48 h compared to the control group. Taking into account the different storage times, we established a suitable range of extracts concentrations to be used in boar semen. The rooibos extract ought to be considered as a powerful and natural source of antioxidants for the preservation of boar semen.
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Affiliation(s)
- José Luis Ros-Santaella
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
- * E-mail: (JLRS); (EP)
| | - Eliana Pintus
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
- * E-mail: (JLRS); (EP)
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Krizova J, Stufkova H, Rodinova M, Macakova M, Bohuslavova B, Vidinska D, Klima J, Ellederova Z, Pavlok A, Howland DS, Zeman J, Motlik J, Hansikova H. Mitochondrial Metabolism in a Large-Animal Model of Huntington Disease: The Hunt for Biomarkers in the Spermatozoa of Presymptomatic Minipigs. NEURODEGENER DIS 2017. [PMID: 28633139 DOI: 10.1159/000475467] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Huntington disease (HD) is a fatal neurodegenerative disorder involving reduced muscle coordination, mental and behavioral changes, and testicular degeneration. In order to further clarify the decreased fertility and penetration ability of the spermatozoa of transgenic HD minipig boars (TgHD), we applied a set of mitochondrial metabolism (MM) parameter measurements to this promising biological material, which can be collected noninvasively in longitudinal studies. OBJECTIVE We aimed to optimize methods for MM measurements in spermatozoa and to establish possible biomarkers of HD in TgHD spermatozoa expressing the N-terminal part of mutated human huntingtin. METHODS Semen samples from 12 TgHD and wild-type animals, aged 12-65 months, were obtained repeatedly during the study. Respiration was measured by polarography, MM was assessed by the detection of oxidation of radiolabeled substrates (mitochondrial energy-generating system; MEGS), and the content of the oxidative phosphorylation system subunits was detected by Western blot. Three possibly interfering factors were statistically analyzed: the effect of HD, generation and aging. RESULTS We found 5 MM parameters which were significantly diminished in TgHD spermatozoa and propose 3 specific MEGS incubations and complex I-dependent respiration as potential biomarkers of HD in TgHD spermatozoa. CONCLUSIONS Our results suggest a link between the gain of toxic function of mutated huntingtin in TgHD spermatozoa and the observed MM and/or glycolytic impairment. We determined 4 biomarkers useful for HD phenotyping and experimental therapy monitoring studies in TgHD minipigs.
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Affiliation(s)
- Jana Krizova
- Laboratory for Study of Mitochondrial Disorders, Department of Pediatrics and Adolescent Medicine, General University Hospital and First Faculty of Medicine, Charles University, Prague, Czech Republic
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Giaretta E, Munerato M, Yeste M, Galeati G, Spinaci M, Tamanini C, Mari G, Bucci D. Implementing an open-access CASA software for the assessment of stallion sperm motility: Relationship with other sperm quality parameters. Anim Reprod Sci 2017; 176:11-19. [DOI: 10.1016/j.anireprosci.2016.11.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 11/03/2016] [Accepted: 11/11/2016] [Indexed: 12/19/2022]
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31
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Spermometer: electrical characterization of single boar sperm motility. Fertil Steril 2016; 106:773-780.e6. [DOI: 10.1016/j.fertnstert.2016.05.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 05/12/2016] [Accepted: 05/12/2016] [Indexed: 02/04/2023]
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Wasilewska K, Zasiadczyk Ł, Fraser L, Mogielnicka-Brzozowska M, Kordan W. The benefits of cooling boar semen in long-term extenders prior to cryopreservation on sperm quality characteristics. Reprod Domest Anim 2016; 51:781-8. [PMID: 27554400 DOI: 10.1111/rda.12751] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 07/11/2016] [Indexed: 11/27/2022]
Abstract
This study investigated the effects of long-term extenders on post-thaw sperm quality characteristics following different holding times (HT) of boar semen at 17 and 10°C. Sperm-rich fractions, collected from five boars, were diluted in Androhep(®) Plus (AHP), Androstar(®) Plus (ASP), Safecell(®) Plus and TRIXcell(®) Plus (TCP) extenders. The extended semen samples were held for 2 hr at 17°C (HT 1) and additionally for 24 hr at 10°C (HT 2), after they were evaluated and frozen. CASA sperm motility and motion patterns, mitochondrial membrane potential (MMP), plasma membrane integrity (PMI) and normal apical ridge (NAR) acrosome integrity were assessed in the pre-freeze and frozen-thawed semen. The Vybrant Apoptosis Assay Kit was used to analyse the proportions of viable and plasma membrane apoptotic-like changes in spermatozoa. Results indicated that boar variability, extender and HT significantly affected the sperm quality characteristics, particularly after freezing-thawing. Differences in the pre-freeze semen were more marked in the sperm motion patterns between the HTs. Pre-freeze semen in HT 2 showed significantly higher VCL and VAP, whereas no marked effects were observed in the sperm membrane integrity and viability (YO-PRO-1(-) /PI(-) ) among the extenders. Post-thaw sperm TMOT and PMOT were significantly higher in the AHP and ASP extenders of HT 2 group, whereas VSL, VCL and VAP were markedly lower in the TCP extender. Furthermore, spermatozoa from the AHP- and ASP-extended semen of HT 2 group were characterized by higher MMP, PMI and NAR acrosome integrity following freezing-thawing. In most of the extenders, the incidence of frozen-thawed spermatozoa with apoptotic-like changes was greater in HT 1. The findings of this study indicate that holding of boar semen at 10°C for 24 hr in long-term preservation extenders modulates post-thaw sperm quality characteristics in an extender-dependent manner. These results will further contribute to the improvement in the cryopreservation technology of boar semen.
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Affiliation(s)
- K Wasilewska
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Ł Zasiadczyk
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - L Fraser
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
| | - M Mogielnicka-Brzozowska
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - W Kordan
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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Torres MA, Díaz R, Boguen R, Martins SMMK, Ravagnani GM, Leal DF, Oliveira MDL, Muro BBD, Parra BM, Meirelles FV, Papa FO, Dell’Aqua JA, Alvarenga MA, Moretti ADS, Sepúlveda N, de Andrade AFC. Novel Flow Cytometry Analyses of Boar Sperm Viability: Can the Addition of Whole Sperm-Rich Fraction Seminal Plasma to Frozen-Thawed Boar Sperm Affect It? PLoS One 2016; 11:e0160988. [PMID: 27529819 PMCID: PMC4987046 DOI: 10.1371/journal.pone.0160988] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 07/28/2016] [Indexed: 11/24/2022] Open
Abstract
Boar semen cryopreservation remains a challenge due to the extension of cold shock damage. Thus, many alternatives have emerged to improve the quality of frozen-thawed boar sperm. Although the use of seminal plasma arising from boar sperm-rich fraction (SP-SRF) has shown good efficacy; however, the majority of actual sperm evaluation techniques include a single or dual sperm parameter analysis, which overrates the real sperm viability. Within this context, this work was performed to introduce a sperm flow cytometry fourfold stain technique for simultaneous evaluation of plasma and acrosomal membrane integrity and mitochondrial membrane potential. We then used the sperm flow cytometry fourfold stain technique to study the effect of SP-SRF on frozen-thawed boar sperm and further evaluated the effect of this treatment on sperm movement, tyrosine phosphorylation and fertility rate (FR). The sperm fourfold stain technique is accurate (R2 = 0.9356, p > 0.01) for simultaneous evaluation of plasma and acrosomal membrane integrity and mitochondrial membrane potential (IPIAH cells). Centrifugation pre-cryopreservation was not deleterious (p > 0.05) for any analyzed variables. Addition of SP-SRF after cryopreservation was able to improve total and progressive motility (p < 0.05) when boar semen was cryopreserved without SP-SRF; however, it was not able to decrease tyrosine phosphorylation (p > 0.05) or improve IPIAH cells (p > 0.05). FR was not (p > 0.05) statistically increased by the addition of seminal plasma, though females inseminated with frozen-thawed boar semen plus SP-SRF did perform better than those inseminated with sperm lacking seminal plasma. Thus, we conclude that sperm fourfold stain can be used to simultaneously evaluate plasma and acrosomal membrane integrity and mitochondrial membrane potential, and the addition of SP-SRF at thawed boar semen cryopreserved in absence of SP-SRF improve its total and progressive motility.
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Affiliation(s)
- Mariana Andrade Torres
- Laboratory of Andrology and Technology of Swine Embryos, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Rommy Díaz
- Center of Excellence in Biotechnology of Reproduction, University of La Frontera, Temuco, Araucania, Chile
| | - Rodrigo Boguen
- Center of Excellence in Biotechnology of Reproduction, University of La Frontera, Temuco, Araucania, Chile
| | - Simone Maria Massami Kitamura Martins
- Laboratory of Andrology and Technology of Swine Embryos, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
- Laboratory of Swine Research, Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Gisele Mouro Ravagnani
- Laboratory of Andrology and Technology of Swine Embryos, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Diego Feitosa Leal
- Laboratory of Andrology and Technology of Swine Embryos, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Melissa de Lima Oliveira
- Laboratory of Andrology and Technology of Swine Embryos, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Bruno Bracco Donatelli Muro
- Laboratory of Andrology and Technology of Swine Embryos, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Beatriz Martins Parra
- Laboratory of Andrology and Technology of Swine Embryos, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Flávio Vieira Meirelles
- Department of Veterinary Medicine, School of Animal Sciences and Food Engineerig, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Frederico Ozanan Papa
- Department of Animal Reproduction and Veterinary Radiology, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - José Antônio Dell’Aqua
- Department of Animal Reproduction and Veterinary Radiology, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Marco Antônio Alvarenga
- Department of Animal Reproduction and Veterinary Radiology, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Aníbal de Sant’Anna Moretti
- Laboratory of Swine Research, Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
| | - Néstor Sepúlveda
- Center of Excellence in Biotechnology of Reproduction, University of La Frontera, Temuco, Araucania, Chile
| | - André Furugen Cesar de Andrade
- Laboratory of Andrology and Technology of Swine Embryos, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, São Paulo, Brazil
- * E-mail:
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Zhen L, Wang L, Fu J, Li Y, Zhao N, Li X. Hexavalent chromium affects sperm motility by influencing protein tyrosine phosphorylation in the midpiece of boar spermatozoa. Reprod Toxicol 2015; 59:66-79. [PMID: 26582256 DOI: 10.1016/j.reprotox.2015.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 10/14/2015] [Accepted: 11/02/2015] [Indexed: 12/20/2022]
Abstract
Hexavalent chromium reportedly induces reproductive toxicity and further inhibits male fertility in mammals. In this study, we investigated the molecular mechanism by which hexavalent chromium affects motility signaling in boar spermatozoa in vitro. The results indicated that Cr(VI) decreased sperm motility, protein phosphorylation, mitochondrial membrane potential (ΔΨm) and metabolic enzyme activity starting at 4μmol/mL following incubation for 1.5h. Notably, all parameters were potently inhibited by 10μmol/mL Cr, while supplementation with the dibutyryl-cAMP (dbcAMP) and the 3-isobutyl-1-methylxanthine (IBMX) prevented the inhibition of protein phosphorylation. Interestingly, high concentrations of Cr (>10μmol/mL) increased the tyrosine phosphorylation of some high-molecular-weight proteins in the principle piece but decreased that in the middle piece associated with an extreme reduction of sperm motility. These results suggest that chromium affects boar sperm motility by impairing tyrosine phosphorylation in the midpiece of sperm by blocking the cAMP/PKA pathway in boar sperm in vitro.
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Affiliation(s)
- Linqing Zhen
- Shanghai Key Lab of Veterinary Biotechnology, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China
| | - Lirui Wang
- Shanghai Key Lab of Veterinary Biotechnology, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China
| | - Jieli Fu
- Shanghai Key Lab of Veterinary Biotechnology, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China
| | - Yuhua Li
- Shanghai Key Lab of Veterinary Biotechnology, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China
| | - Na Zhao
- Shanghai Key Lab of Veterinary Biotechnology, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China
| | - Xinhong Li
- Shanghai Key Lab of Veterinary Biotechnology, School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China.
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Ajao C, Andersson MA, Teplova VV, Nagy S, Gahmberg CG, Andersson LC, Hautaniemi M, Kakasi B, Roivainen M, Salkinoja-Salonen M. Mitochondrial toxicity of triclosan on mammalian cells. Toxicol Rep 2015; 2:624-637. [PMID: 28962398 PMCID: PMC5598359 DOI: 10.1016/j.toxrep.2015.03.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/29/2015] [Accepted: 03/30/2015] [Indexed: 01/08/2023] Open
Abstract
Effects of triclosan (5-chloro-2'-(2,4-dichlorophenoxy)phenol) on mammalian cells were investigated using human peripheral blood mono nuclear cells (PBMC), keratinocytes (HaCaT), porcine spermatozoa and kidney tubular epithelial cells (PK-15), murine pancreatic islets (MIN-6) and neuroblastoma cells (MNA) as targets. We show that triclosan (1-10 μg ml-1) depolarised the mitochondria, upshifted the rate of glucose consumption in PMBC, HaCaT, PK-15 and MNA, and subsequently induced metabolic acidosis. Triclosan induced a regression of insulin producing pancreatic islets into tiny pycnotic cells and necrotic death. Short exposure to low concentrations of triclosan (30 min, ≤1 μg/ml) paralyzed the high amplitude tail beating and progressive motility of spermatozoa, within 30 min exposure, depolarized the spermatozoan mitochondria and hyperpolarised the acrosome region of the sperm head and the flagellar fibrous sheath (distal part of the flagellum). Experiments with isolated rat liver mitochondria showed that triclosan impaired oxidative phosphorylation, downshifted ATP synthesis, uncoupled respiration and provoked excessive oxygen uptake. These exposure concentrations are 100-1000 fold lower that those permitted in consumer goods. The mitochondriotoxic mechanism of triclosan differs from that of valinomycin, cereulide and the enniatins by not involving potassium ionophoric activity.
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Key Words
- Acidosis
- BCF, bioconcentration factor
- EC50, concentration that diminishes the respective vitality parameter by ≥50%
- Electric transmembrane potential
- Glycolysis
- HaCaT, a spontaneously immortalized (non-neoplastic) keratinocyte cell line
- JC-1, 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolyl-carbocyanine iodide
- MIC, minimal inhibitory concentration
- MIN-6, a murine pancreatic beta cell line
- MNA, a murine neuroblastoma cells
- Oxidative phosphorylation
- PBMC, monocyte-enriched peripheral blood mononuclear cells
- PI, propidium iodide
- PK-15, a porcine kidney tubular epithelial cell line
- PN, pyridine nucleotides
- RLM, rat liver mitochondria
- Sperm motility
- TPP+, tetraphenylphosphonium
- Uncoupler
- ΔΨ, electric transmembrane potential
- ΔΨm, membrane potential of the mitochondrial membrane
- ΔΨp, membrane potential of the plasma membrane
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Affiliation(s)
- Charmaine Ajao
- Department of Food and Environmental Sciences, Haartman Institute, University of Helsinki, POB 56, FI-00014, Finland
| | - Maria A. Andersson
- Department of Food and Environmental Sciences, Haartman Institute, University of Helsinki, POB 56, FI-00014, Finland
| | - Vera V. Teplova
- Institute of Theoretical and Experimental Biophysics, RAS, Puschino, Moscow Region, Russia
| | - Szabolcs Nagy
- Department of Animal Science and Animal Husbandry, University of Pannonia, Georgikon Faculty, Deak F. u.,16, H8360 Keszthely, Hungary
| | - Carl G. Gahmberg
- Dept. of Bio- and Environmental Sciences, Haartman Institute, University of Helsinki, FI-00014, Finland
| | - Leif C. Andersson
- Dept. of Pathology, Haartman Institute, University of Helsinki, FI-00014, Finland
| | - Maria Hautaniemi
- Finnish Food Safety Authority (EVIRA), Research and Laboratory Department, Veterinary Virology Research Unit, Mustialankatu 3, FI 00790 Helsinki, Finland
| | - Balazs Kakasi
- Institute of Environmental Sciences, University of Pannonia, Egyetem u. 10, H-8200 Veszprem, Hungary
| | - Merja Roivainen
- National Institute for Health and Welfare, Department of Virology, Mannerheimintie 166, 00300 Helsinki, Finland
| | - Mirja Salkinoja-Salonen
- Department of Food and Environmental Sciences, Haartman Institute, University of Helsinki, POB 56, FI-00014, Finland
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Mizuno Y, Isono A, Kojima A, Arai MM, Noda T, Sakase M, Fukushima M, Harayama H. Distinct segment-specific functions of calyculin A-sensitive protein phosphatases in the regulation of cAMP-triggered events in ejaculated bull spermatozoa. Mol Reprod Dev 2015; 82:232-50. [PMID: 25735235 DOI: 10.1002/mrd.22465] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 02/02/2015] [Indexed: 12/19/2022]
Abstract
Livestock spermatozoa possess more tenacious suppressors of cAMP-triggered events-including capacitation-associated changes-than laboratory animal spermatozoa, leading to flagellar hyperactivation. In order to identify the suppressors, we examined effects of an inhibitor of serine/threonine protein phosphatases (calyculin A) on cAMP-triggered changes in the protein phosphorylation state, and subsequent occurrence of hyperactivation and acrosome reaction in ejaculated bull spermatozoa. Ejaculated spermatozoa were incubated in cAMP-supplemented medium, then assessed for motility, acrosome morphology, and phosphorylated protein localization. The addition of calyculin A greatly enhanced cAMP-triggered protein phosphorylation at serine/threonine and tyrosine residues in the connecting piece and induction of flagellar hyperactivation. Most hyperactivated spermatozoa exhibited extremely asymmetrical bends at the middle piece, which produced intensive twisting or figure-eight movements. In the sperm head, however, cAMP-triggered dephosphorylation of serine/threonine-phosphorylated proteins and subsequent acrosome reaction were abolished by the addition of calyculin A. Based on these results, we suggest that calyculin A-sensitive protein phosphatases in the connecting piece are suppressors of cAMP-triggered events leading to hyperactivation. By contrast, similar protein phosphatases in the sperm head accelerate cAMP-triggered events leading to the acrosome reaction. These findings are consistent with the indication that calyculin A-sensitive protein phosphatases have distinct functions in the regulation of cAMP-triggered events in different regions of ejaculated bull spermatozoa.
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Affiliation(s)
- Yohei Mizuno
- Laboratory of Reproductive Biology, Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Kobe, 657-8501, Japan
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Pinart E, Yeste M, Bonet S. Acrosin activity is a good predictor of boar sperm freezability. Theriogenology 2015; 83:1525-33. [PMID: 25748245 DOI: 10.1016/j.theriogenology.2015.02.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 01/30/2015] [Accepted: 02/01/2015] [Indexed: 10/24/2022]
Abstract
The main aim of this study was to determine whether acrosin activity could predict boar sperm freezability. For this purpose, we characterized the changes in sperm quality and acrosin activity throughout the cryopreservation procedure of sperm samples from 30 Pietrain boars by analyzing four critical steps: step 1 (extended sperm at 15 °C), step 2 (cooled sperm at 5 °C), step 3 (30 minutes postthaw), and step 4 (240 minutes postthaw). Freezability ejaculate groups were set on the basis of sperm motility and membrane integrity after freeze-thawing. Results obtained highlighted the low predictive value in terms of freezability of sperm motility and kinematics and sperm membrane integrity, as no differences between good and poor freezability ejaculates were seen before cryopreservation. Significant differences (P < 0.05) between ejaculate groups were observed in the cooling step at 5 °C for sperm kinetic parameters, and after thawing for sperm motility and membrane integrity. In contrast, acrosin activity appeared as an indicator of boar sperm freezability because the differences (P < 0.05) between good and poor freezability ejaculates manifested yet in extended samples at 15 °C. On the other hand, we also found that variations in sperm kinematics, membrane lipid disorder, intracellular calcium content, acrosome integrity, and acrosin activity throughout the cryopreservation procedure were indicative of a significant damage in spermatozoa during the cooling step in both ejaculate groups. In conclusion, the main finding of our study is that acrosin activity can be used as a reliable predictor of boar sperm freezability because it differs significantly between good and poor freezability ejaculates yet before freeze-thawing procedures took place, i.e., in the refrigeration step at 15 °C.
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Affiliation(s)
- Elisabeth Pinart
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, Girona, Spain.
| | - Marc Yeste
- Unit of Animal Reproduction, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, Autonomous University of Barcelona, Barcelona, Spain
| | - Sergi Bonet
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, Girona, Spain
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Kojima A, Matsushita Y, Ogura Y, Ishikawa S, Noda T, Murase T, Harayama H. Roles of extracellular Ca(2+) in the occurrence of full-type hyperactivation in boar ejaculated spermatozoa pre-incubated to induce the cAMP-triggered events. Andrology 2015; 3:321-31. [PMID: 25656239 DOI: 10.1111/andr.12005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 11/23/2014] [Accepted: 12/03/2014] [Indexed: 12/26/2022]
Abstract
There are species differences in the regulatory system for sperm capacitation and subsequent hyperactivation between livestock and laboratory animals. In livestock spermatozoa, it is poorly understood when and how extracellular Ca(2+) is necessary for hyperactivation, although it has been demonstrated that the [Ca(2+) ]i increase is indispensable to occurrence of hyperactivation. In this study, we examined necessity of extracellular Ca(2+) for the initiation and maintenance of hyperactivation and then sought possible target molecule of Ca(2+) that was involved in hyperactivation of boar spermatozoa. Boar ejaculated spermatozoa were pre-incubated with a cell-permeable cyclic adenosine monophosphate (cAMP) analog 'cBiMPS' and without CaCl2 to induce the cAMP-triggered events including capacitation-associated changes. Subsequently, they were incubated with CaCl2 to induce hyperactivation and then used for motility assessment. Many of the spermatozoa after the incubation exhibited full-type hyperactivation which was characterized by high-amplitude and extremely asymmetrical beating of whole middle piece and principal piece. The initiation of full-type hyperactivation required the millimolar concentration of CaCl2 in the medium. However, CaCl2 of the medium was less necessary for maintenance than initiation of full-type hyperactivation, as hyperactivated spermatozoa were barely affected by the incubation with the Ca(2+) -chelating reagent. On the other hand, the pre-treatment with the inhibitor for Ca(2+) -dependent protease 'calpain 1 and 2' clearly suppressed the occurrence of CaCl2 -induced hyperactivation without influences on the percentages of motile spermatozoa. Western blotting and indirect immunofluorescence showed distribution of calpain 2 in the middle and principal pieces in which full-type hyperactivated spermatozoa exhibited extremely asymmetrical beating. On the basis of these results, we conclude that the millimolar concentration of extracellular Ca(2+) is necessary for the initiation, but not for the maintenance of full-type hyperactivation in boar spermatozoa that beforehand undergo the cAMP-triggered events including capacitation-associated changes. Moreover, we suggest possible involvement of calpain 2 in the intracellular Ca(2+) signal transduction leading to full-type hyperactivation.
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Affiliation(s)
- A Kojima
- Division of Animal Science, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
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Katoh Y, Takebayashi K, Kikuchi A, Iki A, Kikuchi K, Tamba M, Kawashima A, Matsuda M, Okamura N. Porcine sperm capacitation involves tyrosine phosphorylation and activation of aldose reductase. Reproduction 2014; 148:389-401. [PMID: 25049426 DOI: 10.1530/rep-14-0199] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Mammalian sperm must be activated in the tubal isthmus through capacitation to induce the acrosome reaction and subsequent fertilization. Although the molecular mechanisms involved in capacitation have yet to be fully elucidated, increased concentrations of reactive oxygen species (ROS) and the extent of tyrosine phosphorylation of proteins have been suggested to play central roles in the completion of capacitation. In this study, aldose reductase was for the first time identified as one of the tyrosine-phosphorylated proteins involved in the capacitation of porcine cauda epididymal sperm. Both tyrosine phosphorylation and activity of aldose reductase associated with the particulate fraction of sperm cells were significantly enhanced during capacitation. Alrestatin, a membrane-permeable and specific inhibitor of aldose reductase, plays a role in the inhibition of aldose reductase activity, elevation of intracellular levels of ROS, and induction of hyperactivated motility, all at similar dose dependencies. Alrestatin canceled both the increase in the tyrosine phosphorylation of aldose reductase and the decrease in the glutathione levels in sperm-induced during capacitation. The hyperactivated motility was induced to a higher extent in the presence of glucose than in the presence of fructose. These results indicate that aldose reductase plays an important role in induction of hyperactivation and capacitation of sperm through the elevation of ROS in sperm cells. Furthermore, aldose reductase was shown to be added to sperm during transit through the epididymis, suggesting that aldose reductase is one of the key proteins that support the functional maturation of sperm.
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Affiliation(s)
- Yuki Katoh
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
| | - Kohsuke Takebayashi
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
| | - Akihiko Kikuchi
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
| | - Ayumi Iki
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
| | - Kazuhiro Kikuchi
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
| | - Michiko Tamba
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
| | - Akihiro Kawashima
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
| | - Manabu Matsuda
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
| | - Naomichi Okamura
- Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan Graduate School of Comprehensive Human SciencesUniversity of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8575, JapanCenter for Humanities and SciencesIbaraki Prefectural University of Health Sciences, Ami 4669-2, Ami, Ibaraki 300-0394, JapanDivision of Animal SciencesNational Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, JapanGraduate School of ScienceUniversity of Tokyo, Tokyo 113-0033, Japan
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Alavi SMH, Matsumura N, Shiba K, Itoh N, Takahashi KG, Inaba K, Osada M. Roles of extracellular ions and pH in 5-HT-induced sperm motility in marine bivalve. Reproduction 2014; 147:331-45. [PMID: 24398874 DOI: 10.1530/rep-13-0418] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Factors that inhibit and stimulate the initiation of sperm motility were determined for Manila clam (Ruditapes philippinarum), Pacific oyster (Crassostrea gigas), and Japanese scallop (Patinopecten yessoensis). Compared with artificial seawater (ASW), serotonin (5-hydroxytryptamine creatinine sulfate, 5-HT) could fully trigger sperm motility and increase sperm velocity and motility duration. Sperm motility was decreased in ASW at pH 6.5-7.0 and suppressed at pH 4.0. In Manila clam and Pacific oyster, 5-HT could overcome the inhibitory effects of acidic pH on sperm motility. In the presence of nigericin (a K(+)/H(+) exchanger), sperm motility was only triggered at pH 8.3. Testicular fluid K(+) concentrations were two- to fourfold higher than that in ASW. Sperm motility and velocity were decreased in ASW or 5-HT containing ≥40 mM K(+) or ≥2.5 mM 4-aminopyridine, suggesting K(+) efflux requirement to initiate motility. Sperm motility and velocity were reduced in ASW or 5-HT containing EGTA or W-7, suggesting that extracellular Ca(2)(+) is required for Ca(2)(+)/calmodulin-dependent flagellar beating. Ca(2)(+) influx occurs via Ca(2)(+) channels because sperm motility and velocity were decreased in both ASW and 5-HT containing T-type and L-type Ca(2)(+) channel blockers. 5-HT-dependent initiation of sperm motility was associated with intracellular Ca(2)(+) rise, which was comparable to that seen in ASW but was not observed in the presence of EGTA or a Ca(2)(+) channel blocker. Extracellular Na(+) is also essential for sperm motility initiation via regulation of Na(+)/Ca(2)(+) exchange. Overall, 5-HT-dependent initiation of sperm motility in marine bivalve mollusks is an osmolality-independent mechanism and regulated by extracellular pH, K(+), Ca(2)(+), and Na(+).
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Affiliation(s)
- Sayyed Mohammad Hadi Alavi
- Laboratory of Aquacultural Biology, Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-amamiyamachi, Sendai 981-8555, Japan
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Loux SC, Crawford KR, Ing NH, González-Fernández L, Macías-García B, Love CC, Varner DD, Velez IC, Choi YH, Hinrichs K. CatSper and the Relationship of Hyperactivated Motility to Intracellular Calcium and pH Kinetics in Equine Sperm1. Biol Reprod 2013; 89:123. [DOI: 10.1095/biolreprod.113.111708] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Martin-Hidalgo D, Hurtado de Llera A, Yeste M, Gil MC, Bragado MJ, Garcia-Marin LJ. Adenosine monophosphate-activated kinase, AMPK, is involved in the maintenance of the quality of extended boar semen during long-term storage. Theriogenology 2013; 80:285-94. [DOI: 10.1016/j.theriogenology.2013.02.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 01/30/2013] [Accepted: 02/19/2013] [Indexed: 12/29/2022]
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Kummer ABHP, Gaggini TS, Bernardi ML, McManus C, Gonçales EM, Wentz I, Bortolozzo FP. Multivariate analyses for determining the association of field porcine fertility with sperm motion traits analysed by computer-assisted semen analysis and with sperm morphology. Reprod Domest Anim 2013; 48:747-54. [PMID: 23496757 DOI: 10.1111/rda.12155] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 01/14/2013] [Indexed: 11/28/2022]
Abstract
This study investigates the association of semen traits with boar fertility. The fertility outcome (farrowing rate - FR and total piglets born - TB) of 14 boars was obtained from a field trial conducted during 10 week of breeding period on a commercial farm using multiparous sows (n = 948) through single-sire mating with 2 × 10(9) motile sperm cells per artificial insemination (AI) dose. Sperm motion parameters, evaluated with computer-assisted semen analysis system in raw and stored semen at 17°C for 240 h, in addition to morphological sperm defects, measured on the collection day, were included in the analysis to determine which semen traits were important to discriminate the fertility potential of ejaculates from these boars. The data underwent multivariate cluster, canonical and discriminant analyses. Four clusters of boars were formed based on fertility outcome. One boar, with the lowest FR and TB values (89.7% and 11.98), and two boars, with the highest FR and TB values (97.8% and 14.16), were placed in different clusters. The other boars were separated in two distinct clusters (four and seven boars), including boars with intermediate TB (12.64 and 13.22) but divergent values for FR (95.9% vs 91.8%). Semen traits with higher discriminatory power included total motility, progressive motility, amplitude of lateral head displacement and cytoplasmatic droplets. Through multivariate discriminant analysis, more than 80% of the 140 ejaculates were correctly classified into their own group, showing that this analysis may be an efficient statistical tool to improve the discrimination of potential fertility of boars. Nevertheless, the validation of the relationship between fertility and semen traits using this statistical approach needs to be performed on a larger number of farms and with a greater number of boars.
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Affiliation(s)
- A B H P Kummer
- Setor de Suínos, Faculdade de Medicina Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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The protective effect of a 17°C holding time on boar sperm plasma membrane fluidity after exposure to 5°C. Cryobiology 2013; 66:69-75. [DOI: 10.1016/j.cryobiol.2012.11.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Revised: 11/12/2012] [Accepted: 11/23/2012] [Indexed: 11/24/2022]
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Isobe T. New method to estimate the possibility of natural pregnancy using computer-assisted sperm analysis. Syst Biol Reprod Med 2012; 58:339-47. [DOI: 10.3109/19396368.2012.700759] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Freking BA, Purdy PH, Spiller SF, Welsh CS, Blackburn HD. Boar sperm quality in lines of pigs selected for either ovulation rate or uterine capacity1,2. J Anim Sci 2012. [DOI: 10.2527/jas.2011-4723] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- B. A. Freking
- U.S. Meat Animal Research Center, ARS-USDA, Clay Center, NE 68933
| | - P. H. Purdy
- National Animal Germplasm Program, Fort Collins, CO 80521
| | - S. F. Spiller
- National Animal Germplasm Program, Fort Collins, CO 80521
| | - C. S. Welsh
- National Animal Germplasm Program, Fort Collins, CO 80521
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Miro-Moran A, Jardin I, Ortega-Ferrusola C, Salido GM, Peña FJ, Tapia JA, Aparicio IM. Identification and function of exchange proteins activated directly by cyclic AMP (Epac) in mammalian spermatozoa. PLoS One 2012; 7:e37713. [PMID: 22662198 PMCID: PMC3360633 DOI: 10.1371/journal.pone.0037713] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2011] [Accepted: 04/23/2012] [Indexed: 12/13/2022] Open
Abstract
The role of cAMP in spermatic functions was classically thought to be mediated exclusively through the activation of Protein Kinase A (PKA). However, it has recently been shown that cAMP also exerts its effects through a PKA-independent pathway activating a family of proteins known as Epac proteins. Therefore, many of the spermatic functions thought to be regulated by cAMP through the activation of PKA are again under study. We aimed to identify and to investigate the role of Epac proteins in spermatozoa using a specific permeable analog (8-Br-2′-O-Me-cAMP). Also, we aimed to study its relationship with E-cadherin, an adhesion protein involved in fertility. Our results demonstrate the presence and sub-cellular distribution of Epac 1 and Epac 2 in mammalian spermatozoa. Capacitation and the acrosome reaction induced a change in the localization of Epac proteins in sperm. Moreover, incubation with 8-Br-2′-O-Me-cAMP prompted an increase in Rap1 activation, in the scrambling of plasma membrane phospholipids (necessary for the capacitation process), the acrosome reaction, motility, and calcium mobilization, when spermatozoa were incubated in acrosome reaction conditions. Finally, the activation of Epac proteins induced a change in the distribution of E-cadherin. Therefore, the increase in the acrosome reaction, together with the increase in calcium (which is known to be essential for fertilization) and the Epac nteraction with E-cadherin, might indicate that Epac proteins have an important role in gamete recognition and fertilization.
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Affiliation(s)
- Alvaro Miro-Moran
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
| | - Isaac Jardin
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
| | | | - Gines M. Salido
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
| | - Fernando J. Peña
- Laboratory of Spermatology, Veterinary Teaching Hospital, University of Extremadura, Caceres, Spain
| | - Jose A. Tapia
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
| | - Ines M. Aparicio
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
- * E-mail:
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Parrilla I, del Olmo D, Caballero I, Tarantini T, Cuello C, Gil MA, Roca J, Martinez EA, Vazquez JM. The Effect of Glycerol Concentrations on the Post-thawIn VitroCharacteristics of Cryopreserved Sex-sorted Boar Spermatozoa. Reprod Domest Anim 2012; 47:965-74. [DOI: 10.1111/j.1439-0531.2012.02000.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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The effect of melatonin on the quality of extended boar semen after long-term storage at 17 °C. Theriogenology 2011; 75:1550-60. [DOI: 10.1016/j.theriogenology.2010.12.021] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 12/14/2010] [Accepted: 12/19/2010] [Indexed: 01/01/2023]
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Juarez JD, Parrilla I, Vazquez JM, Martinez EA, Roca J. Boar semen can tolerate rapid cooling rates prior to freezing. Reprod Fertil Dev 2011; 23:681-90. [DOI: 10.1071/rd10216] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Accepted: 01/27/2011] [Indexed: 11/23/2022] Open
Abstract
Two experiments were performed in the present study that demonstrated that boar spermatozoa are capable of surviving rapid cooling rates within a range of 15–5°C before freezing. Boar ejaculates diluted in Beltsville thawing solution (BTS) (1 : 1, v/v) were held at 17–20°C and shipped over a 24-h time period from two AI centres to a cryobiology laboratory, where they were pooled (Experiment 1) or cryopreserved individually (Experiment 2) using a standard 0.5-mL straw freezing protocol. The effects of cooling before freezing were assessed after thawing through the objective evaluation of sperm motility and flow cytometric analysis of membrane integrity, acrosomal status, changes in membrane lipid architecture monitored by merocyanine and annexin V binding and intracellular production of reactive oxygen species. In Experiment 1 (six replicates), two semen pools (five ejaculates per pool) were cooled from 15 to 5°C at rates of 0.08, 0.13, 0.40 and 1.50°C min–1. These cooling rates did not result in any significant differences (P > 0.05) in any of the post-thaw sperm assessments, even in thawed samples incubated under capacitation conditions. In Experiment 2, three individual ejaculates from 16 boars were slowly (0.08°C min–1) or rapidly (1.5°C min–1) cooled before freezing. A consistent interboar variability (P < 0.01) was detected, which was independent of the cooling rate used. Cooling rate only significantly influenced (P < 0.05) sperm assessments in four of 16 boars, which exhibited slightly higher percentages of motile cells and intact plasma and acrosomal membranes in the samples that had been cooled slowly. These findings demonstrate that boar spermatozoa undergoing cryopreservation can withstand rapid cooling rates before freezing.
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