1
|
Delgado-Bermúdez A. Insights into crucial molecules and protein channels involved in pig sperm cryopreservation. Anim Reprod Sci 2024:107547. [PMID: 38981798 DOI: 10.1016/j.anireprosci.2024.107547] [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: 05/15/2024] [Revised: 06/28/2024] [Accepted: 06/28/2024] [Indexed: 07/11/2024]
Abstract
Cryopreservation is the most efficient procedure for long-term preservation of mammalian sperm; however, its use is not currently dominant for boar sperm before its use for artificial insemination. In fact, freezing and thawing have an extensive detrimental effect on sperm function and lead to impaired fertility. The present work summarises the basis of the structural and functional impact of cryopreservation on pig sperm that have been extensively studied in recent decades, as well as the molecular alterations in sperm that are related to this damage. The wide variety of mechanisms underlying the consequences of alterations in expression levels and structural modifications of sperm proteins with diverse functions is detailed. Moreover, the use of cryotolerance biomarkers as predictors of the potential resilience of a sperm sample to the cryopreservation process is also discussed. Regarding the proteins that have been identified to be relevant during the cryopreservation process, they are classified according to the functions they carry out in sperm, including antioxidant function, plasma membrane protection, sperm motility regulation, chromatin structure, metabolism and mitochondrial function, heat-shock response, premature capacitation and sperm-oocyte binding and fusion. Special reference is made to the relevance of sperm membrane channels, as their function is crucial for boar sperm to withstand osmotic shock during cryopreservation. Finally, potential aims for future research on cryodamage and cryotolerance are proposed, which might be crucial to minimise the side-effects of cryopreservation and to make it a more advantageous strategy for boar sperm preservation.
Collapse
Affiliation(s)
- Ariadna Delgado-Bermúdez
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, Girona ES-17003, Spain; Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, Girona ES-17003, Spain.
| |
Collapse
|
2
|
Duma-Pauta JM, Juárez-López NO, Gutiérrez-Pérez O, Córdova-Izquierdo A, Vigueras-Villaseñor RM, Juárez-Mosqueda MDL. Cryopreservation, in addition to protein tyrosine phosphorylation, alters the distribution of phosphatidyl inositol bisphosphate and the localization of cytoskeletal and signaling proteins (gelsolin, tyrosine kinase c-SRC and phospholipase C-ζ) in the perinuclear theca of boar sperm. Cryobiology 2023; 113:104589. [PMID: 37778407 DOI: 10.1016/j.cryobiol.2023.104589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/03/2023]
Abstract
Cryopreservation of boar spermatozoa affects the perinuclear theca (PT) and involves several proteins and molecules that play important roles during capacitation and the acrosomal reaction. The objective of the present study was to evaluate whether the deleterious effects of cryopreservation in addition to protein tyrosine phosphorylation are accompanied by changes in the distribution of phosphatidyl inositol bisphosphate (PIP2) and the localization of cytoskeletal and signaling proteins in the perinuclear theca of cryopreserved boar spermatozoa. For this purpose, by immunocytochemistry (IC) the changes in localization of phosphorylated proteins in tyrosine residues, gelsolin, c-SRC kinase and PLC-ζ, as well as in the distribution of phosphatidyl inositol bisphosphate were analyzed in thawed spermatozoa (T) non capacitated (NC), capacitated (C) and in those with acrosomal reaction (AR) and compared with fresh spermatozoa (F) under the same physiological status. Western blotting (WB) and co-immunoprecipitation were performed to confirm the presence of these proteins in PT and to determine the interaction between these molecules. IC showed that immunostaining for phosphorylated proteins significantly increased in the acrosomal region and flagellum in TNC spermatozoa (p < 0.05). The proportion of cells displaying immunolabeling for gelsolin in the acrosomal region decreased after capacitation in cryopreserved spermatozoa; the same change was found (p < 0.05) in the proportion of spermatozoa immunoreactive to PIP2 in the sperm head. c-SRC was observed in the equatorial segment and acrosomal region, subdomains that coincide with the site where phosphorylated proteins were detected. PLC-ζ immunolocalization in fresh spermatozoa underwent changes after capacitation and acrosomal reaction, with a significant increase in the equatorial segment and post-acrosomal region in cryopreserved spermatozoa (p < 0.05). WB analysis indicated the presence of gelsolin, c-SRC and PLC-ζ in PT; besides, we confirmed that gelsolin co-immunoprecipitated with c-SRC and PLC-ζ, which changes according to the physiological state of spermatozoa. As a conclusion, cryopreservation together with increased immunodetection of tyrosine phosphorylated proteins decreases the detection of PIP2 and alters the immunolocalization patterns of gelsolin, c-SRC and PLC-ζ in the PT in boar spermatozoa.
Collapse
Affiliation(s)
- José Mauricio Duma-Pauta
- Universidad Nacional Autónoma de México, Departamento de Morfología, Facultad de Medicina Veterinaria y Zootecnia, Ciudad Universitaria No. 3000, Ciudad de México, CP, 04510, Mexico; Universidad de Cuenca, Laboratorio de Biotecnología de la Reproducción Animal, Facultad de Ciencias Agropecuarias, Avda. 12 de octubre, EC101205, Cuenca, Ecuador.
| | - Noé Orlando Juárez-López
- Universidad Nacional Autónoma de México, Departamento de Genética y Bioestadística, Facultad de Medicina Veterinaria y Zootecnia, Ciudad Universitaria No. 3000, Ciudad deMéxico, CP, 04510, Mexico.
| | - Oscar Gutiérrez-Pérez
- Universidad Nacional Autónoma de México, Centro de Enseñanaza de Investigación y Extensión en Producción Porcina, Facultad de Medicina Veterinaria y Zootecnia, Ciudad Universitaria No. 3000, Ciudad de México, CP. 04510, México.
| | - Alejandro Córdova-Izquierdo
- Universidad Autónoma Metropolitana Unidad Xochimilco, Departamento de Agricultura y Producción Animal, Calzada del hueso 1100, Ciudad de México, CP, 04960, Mexico.
| | - Rosa María Vigueras-Villaseñor
- Instituto Nacional de Pediatría, Subdirección de Medicina Experimental, Av. Insurgentes Sur 3700-C, Ciudad de México, CP, 04530, Mexico
| | - María de Lourdes Juárez-Mosqueda
- Universidad Nacional Autónoma de México, Departamento de Morfología, Facultad de Medicina Veterinaria y Zootecnia, Ciudad Universitaria No. 3000, Ciudad de México, CP, 04510, Mexico.
| |
Collapse
|
3
|
Contreras MJ, Arias ME, Fuentes F, Muñoz E, Bernecic N, Fair S, Felmer R. Cellular and Molecular Consequences of Stallion Sperm Cryopreservation: Recent Approaches to Improve Sperm Survival. J Equine Vet Sci 2023; 126:104499. [PMID: 37105416 DOI: 10.1016/j.jevs.2023.104499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/19/2023] [Accepted: 04/21/2023] [Indexed: 04/29/2023]
Abstract
Cryopreservation of stallion semen does not achieve the post-thaw quality or fertility results observed in other species like cattle. There are many reasons for this, but the membrane composition and intracellular changes in stallion sperm predispose them to low resistance to the cooling, freezing, and subsequent thawing process. Damage to the sperm results from different processes activated during cryopreservation, including oxidative stress, apoptosis, and structural modifications in the sperm membrane that increase the deleterious effect on sperm. In addition, significant individual variability is observed among stallions in the ability of sperm to survive the freeze-thaw process. Recent advances in genomics, transcriptomics, proteomics, metabolomics, and epigenetics are making it possible to advance our understanding of the cellular and molecular processes involved in the cryopreservation process, opening new possibilities for improvement. This review addresses the ongoing research on stallion semen cryopreservation, focusing on the cellular and molecular consequences of this procedure in stallions and discusses the new tools currently available to increase the tolerance of equine spermatozoa to freeze-thaw.
Collapse
Affiliation(s)
- María José Contreras
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de la Frontera, Temuco, Chile
| | - María Elena Arias
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de la Frontera, Temuco, Chile; Department of Agricultural Production, Faculty of Agriculture and Environmental Sciences, Universidad de La Frontera, Temuco, Chile
| | - Fernanda Fuentes
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de la Frontera, Temuco, Chile; Doctoral Program in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - Erwin Muñoz
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de la Frontera, Temuco, Chile; Doctoral Program in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - Naomi Bernecic
- Laboratory of Animal Reproduction, Department of Biological Sciences, Biomaterials Research Cluster, Bernal Institute, Faculty of Science and Engineering, University of Limerick, Limerick, Ireland
| | - Sean Fair
- Laboratory of Animal Reproduction, Department of Biological Sciences, Biomaterials Research Cluster, Bernal Institute, Faculty of Science and Engineering, University of Limerick, Limerick, Ireland
| | - Ricardo Felmer
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de la Frontera, Temuco, Chile; Department of Agricultural Sciences and Natural Resources, Faculty of Agriculture and Environmental Sciences, Universidad de la Frontera, Temuco, Chile.
| |
Collapse
|
4
|
Zoca GB, Celeghini ECC, Pugliesi G, de Carvalho CPT, Assumpção MEOD, Siqueira AFP, Oliveira LZ, Lançoni R, de Arruda RP. Influence of seminal plasma during different stages of bovine sperm cryopreservation. Reprod Domest Anim 2021; 56:872-883. [PMID: 33724558 DOI: 10.1111/rda.13928] [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: 02/03/2021] [Accepted: 03/08/2021] [Indexed: 11/28/2022]
Abstract
This study aimed to evaluate the effect of seminal plasma on bovine sperm cryopreservation and to assess the integrity of plasma and acrosomal membranes, mitochondrial potential, remodelling of F-actin cytoskeleton and sperm chromatin fragmentation during the cooling, equilibrium and freezing/thawing stages. Six ejaculates collected from seven Nelore bulls (n = 42) were used in this study. Each ejaculate was divided into two aliquots (with seminal plasma = SP group; without seminal plasma = NSP group) and packed to a final concentration of 50 × 106 sperm per straw. Statistical analyses were performed using SAS software (version 9.3), and p ≤ .05 was considered significant. A time effect was observed for all sperm characteristics (p < .05), except for chromatin fragmentation (p > .05). The presence of seminal plasma better preserved the acrosomal integrity (SP = 75.2% and NSP = 71.7%; p < .05) and also provided lower F-actin remodelling during cryopreservation process (SP = 29.9% and NSP = 32.4%; p < .05). Regarding to the cryopreservation stages, it was observed that cooling step induced higher remodelling of F-actin than the equilibrium and freezing/thawing stages (56.3%, 32.2% and 23.9%, respectively; p < .05). The equilibrium step had minor influence on overall sperm characteristics while the freezing/thawing stage was responsible for the highest percentage of damage in plasma membrane (-65.2%), acrosomal membrane (-34.0%) and mitochondrial potential (-48.1%). On the other hand, none of the cryopreservation stages affected chromatin integrity. It was concluded that the presence of seminal plasma provides increased acrosomal integrity and reduced remodelling of F-actin cytoskeleton. Higher F-actin remodelling is observed after the cooling step while the freezing/thawing step is most damaging to sperm membranes and mitochondrial potential during bovine sperm cryopreservation.
Collapse
Affiliation(s)
- Gabriela Bertaiolli Zoca
- Laboratory of Semen Biotechnology and Andrology - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Eneiva Carla Carvalho Celeghini
- Laboratory of Teaching and Research in Pathology of Reproduction - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Guilherme Pugliesi
- Laboratory of Physiology and Molecular Endocrinology, Center of Biotechnology in Animal Reproduction - Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Carla Patricia Teodoro de Carvalho
- Laboratory of Semen Biotechnology and Andrology - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Mayra Elena Ortiz D'Avila Assumpção
- Laboratory of Sperm Biology, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Adriano Felipe Perez Siqueira
- Laboratory of Sperm Biology, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Leticia Zoccolaro Oliveira
- Laboratory of Animal Reproduction, Department of Veterinary Clinics and Surgery, Veterinary School, University Federal of Minas Gerais, Belo Horizonte, Brazil
| | - Renata Lançoni
- Laboratory of Semen Biotechnology and Andrology - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Rubens Paes de Arruda
- Laboratory of Semen Biotechnology and Andrology - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| |
Collapse
|
5
|
Yang Y, Liu D, Wu L, Huang W, Yang S, Xia J, Liu X, Meng Z. Comparative transcriptome analyses reveal changes of gene expression in fresh and cryopreserved yellow catfish (Pelteobagrus fulvidraco) sperm and the effects of Cryoprotectant Me 2SO. Int J Biol Macromol 2019; 133:457-465. [PMID: 31002905 DOI: 10.1016/j.ijbiomac.2019.04.050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/08/2019] [Accepted: 04/08/2019] [Indexed: 10/27/2022]
Abstract
This study, for the first time in fish, compared the transcriptome of fresh and frozen-thawed sperm, and would help to better understand the effect of cryopreservation on fish sperm and then better preserve the aquatic germplasm resources. Here, we employed high-throughput sequencing technology to obtain the transcriptome of yellow catfish from fresh sperm, cryopreserved sperm with and without cryoprotectant. When cryoprotectant (Me2SO) was excluded, down-regulated genes were significantly enriched into calcium ion binding, cytoskeletal protein binding, microfilament motor activity, calmodulin binding and carnitine O-acyltransferase activity, which affected Ca2+ regulation, cellular morphology, motility and metabolism. Moreover, heat shock proteins and genes associated with regulation of cholesterol, HCO3- and protein tyrosine phosphorylation (PTP) were down-regulated, and thus would impair ability against stress, membrane rigidity, pH regulation and signal transduction of cryopreserved sperm. After Me2SO was added, the amounts of DEGs decreased significantly and down-regulation of genes were found mainly in cytoskeleton and heat shock proteins, thereby suggesting that Me2SO effectively reduced the impact caused by low temperature on gene expression. Whether adding Me2SO or not, the up-regulated genes were mainly found in ribosomal proteins genes. However, when Me2SO was added, over-expression of some genes might contribute to maintain normal function of cryopreserved sperm.
Collapse
Affiliation(s)
- Yang Yang
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Dongqing Liu
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Lina Wu
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Wenhua Huang
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China.
| | - Sen Yang
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Junhong Xia
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China.
| | - Xiaochun Liu
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China.
| | - Zining Meng
- School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China.
| |
Collapse
|
6
|
Fraser L, Zasiadczyk Ł, Pareek CS. Effects of boar variability on comet-detected sperm-DNA damage following cryopreservation. ANIMAL PRODUCTION SCIENCE 2018. [DOI: 10.1071/an16274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Assessment of sperm-DNA integrity is a crucial issue in male fertility. In the present study, parameters derived from the image analysis of comets after single-cell gel electrophoresis were used to analyse the types of DNA damage of frozen–thawed boar spermatozoa. Semen, frozen in a cryoprotectant-free extender or in cryoprotectant-based extenders, was analysed for DNA fragmentation and with the following comet tail measures: percentage DNA in comet tail, comet tail length and olive tail moment. The percentages of sperm DNA damage in the comet tails were classified as Type 0 (no DNA damage), Type I (very low DNA damage), Type II (light DNA damage), Type III (medium DNA damage) and Type IV (heavy DNA damage). Sperm motility characteristics and membrane integrity were assessed in the pre-freeze and frozen–thawed semen samples. Assessment of sperm DNA fragmentation and comet tail measures showed marked inter-boar variability following cryopreservation. However, consistent differences among the boars, with respect to cryo-induced sperm DNA damage, were detected by the comet tail length and olive tail moment. Besides Type IV, all types of DNA damage were detected in the cryoprotectant-based extenders. It was found that the frequency of Type II and Type III of DNA damage of frozen–thawed spermatozoa was significantly greater in the cryoprotectant-based and cryoprotectant-free extenders respectively. Deterioration in the quality of the sperm DNA integrity was concomitant with a marked decline in sperm motility characteristics, reduced plasma membrane integrity and higher lipid peroxidation and aspartate aminotransferase activity after cryopreservation. It can be suggested that the comet-assay parameters, coupled with routine laboratory tests, are useful to improve the sperm evaluations of post-thaw quality of semen from individual boars and would offer more comprehensive information for a better understanding of the degree of cryo-induced sperm-DNA damage.
Collapse
|
7
|
Yeste M. Recent Advances in Boar Sperm Cryopreservation: State of the Art and Current Perspectives. Reprod Domest Anim 2016; 50 Suppl 2:71-9. [PMID: 26174922 DOI: 10.1111/rda.12569] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 06/05/2015] [Indexed: 01/04/2023]
Abstract
While sperm cryopreservation is the best technology to store boar semen for long-term periods, only 1% of all artificial inseminations (AI) conducted worldwide are made using frozen-thawed boar sperm. With the emergence of long-term extenders for liquid storage, the use of cryopreserved sperm in routine AI is less required. However, banks of boar semen contain cryopreserved sperm and planning inseminations in AI centres may benefit from the use of frozen-thawed semen. Therefore, there is an interest in the use of this technology to preserve boar sperm. In this regard, although the first attempts to cryopreserve boar semen date back to the seventies and this technology is still considered as optimal, some relevant improvements have been made in the last decade. After giving a general picture about boar sperm cryodamage, the present review seeks to shed light on these recent cryopreservation advances. These contributions regard to protein markers for predicting ejaculate freezability, sperm selection prior to start cryopreservation procedures, additives to freezing and thawing extenders, relevance of the AI-technique and insemination-to-ovulation interval. In conclusion, most of these progresses have allowed counteracting better boar sperm cryodamage and are thus considered as forward steps for this storage method. It is also worth noting that, despite being lower than fresh/extended semen, reproductive performance outcomes following AI with frozen-thawed boar sperm are currently acceptable.
Collapse
Affiliation(s)
- M Yeste
- Nuffield Department of Obstetrics and Gynaecology, Level 3, Women's Centre, John Radcliffe Hospital, University of Oxford, Headington, Oxford, UK
| |
Collapse
|
8
|
Yeste M. Sperm cryopreservation update: Cryodamage, markers, and factors affecting the sperm freezability in pigs. Theriogenology 2015; 85:47-64. [PMID: 26506124 DOI: 10.1016/j.theriogenology.2015.09.047] [Citation(s) in RCA: 225] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 09/20/2015] [Accepted: 09/22/2015] [Indexed: 02/04/2023]
Abstract
Cryopreservation is the most efficient method for long-term preservation of mammalian sperm. However, freeze-thawing procedures may strongly impair the sperm function and survival and thus decrease the reproductive performance. In addition, the sperm resilience to withstand cryopreservation, also known as freezability, presents a high individual variability. The present work summarizes the principles of cryoinjury and the relevance of permeating and nonpermeating cryoprotective agents. Descriptions about sperm cryodamage are mainly focused on boar sperm, but reference to other mammalian species is also made when relevant. Main cryoinjuries not only regard to sperm motility and membrane integrity, but also to the degradation effect exerted by freeze-thawing on other important components for sperm fertilizing ability, such as mRNAs. After delving into the main differences between good and poor freezability boar ejaculates, those protein markers predicting the sperm ability to sustain cryopreservation are also mentioned. Moreover, factors that may influence sperm freezability, such as season, diet, breed, or ejaculate fractions are discussed, together with the effects of different additives, like seminal plasma and antioxidants. After briefly referring to the effects of long-term sperm preservation in frozen state and the reproductive performance of frozen-thawed boar sperm, this work speculates with new research horizons on the preservation of boar sperm, such as vitrification and freeze-drying.
Collapse
Affiliation(s)
- Marc Yeste
- Nuffield Department of Obstetrics and Gynaecology, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Oxford, UK.
| |
Collapse
|
9
|
|
10
|
Alkmin DV, Martinez-Alborcia MJ, Parrilla I, Vazquez JM, Martinez EA, Roca J. The nuclear DNA longevity in cryopreserved boar spermatozoa assessed using the Sperm-Sus-Halomax. Theriogenology 2013; 79:1294-300. [DOI: 10.1016/j.theriogenology.2013.02.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 02/06/2013] [Accepted: 02/07/2013] [Indexed: 10/26/2022]
|
11
|
Chankitisakul V, Am-In N, Tharasanit T, Somfai T, Nagai T, Techakumphu M. Sperm pretreatment with dithiothreitol increases male pronucleus formation rates after intracytoplasmic sperm injection (ICSI) in swamp buffalo oocytes. J Reprod Dev 2012; 59:66-71. [PMID: 23132520 PMCID: PMC3943227 DOI: 10.1262/jrd.2012-104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Failure of male pronucleus formation has hampered the success of intracytoplasmic sperm
injection (ICSI) in swamp buffalo. The aim of the present study was to improve male
pronucleus formation by pretreating sperm with various chemicals before ICSI. In
Experiments1 and 2, sperm were treated according to one of the following protocols: (1)
0.1% Triton-X 100 (TX) for 1 min, (2) 10 µM calcium ionophore (CaI) for 20 min, (3)
freezing and thawing (FT) without any cryoprotectant, or (4) no treatment (control). These
sperm treatment groups then either did or did not receive additional sperm treatment with
5 mM dithiothreitol (DTT) for 20 min. Acrosomal integrity (Experiment 1) and DNA
fragmentation (Experiment 2) were evaluated in the sperm before ICSI. In Experiment 3,
oocytes matured in vitro were subjected to ICSI using pretreated sperm as
described above and then were cultured either with or without activation. The TX- and
CaI-treated sperm caused an increase in the number of acrosome-loss sperm, whereas the FT
treatment and control increased the proportion of acrosome-reacted sperm (P<0.05). The
DNA fragmentation did not differ among treatments (P>0.05). At 18 h post-ICSI,
pronucleus (PN) formation was found only in activated oocytes. The majority of the
activated ICSI oocytes contained intact sperm heads. Normal fertilization was observed in
the CaI and FT treatment groups and control group when sperm were treated with DTT before
ICSI. In conclusion, DTT treatment of sperm with reacted acrosomes before ICSI together
with activation of the ICSI oocytes is important for successful male pronucleus
formation.
Collapse
Affiliation(s)
- Vibuntita Chankitisakul
- Department of Obstetrics, Gynaecology and Reproduction, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | | | | | | | | | | |
Collapse
|
12
|
Current World Literature. Curr Opin Obstet Gynecol 2012; 24:194-9. [DOI: 10.1097/gco.0b013e328353d51d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
13
|
Felipe-Pérez YE, Valencia J, Juárez-Mosqueda MDL, Pescador N, Roa-Espitia AL, Hernández-González EO. Cytoskeletal proteins F-actin and β-dystrobrevin are altered by the cryopreservation process in bull sperm. Cryobiology 2011; 64:103-9. [PMID: 22209823 DOI: 10.1016/j.cryobiol.2011.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 12/16/2011] [Accepted: 12/19/2011] [Indexed: 10/14/2022]
Abstract
The cryopreservation process has an important impact on sperm structure and physiology. The negative effects have been mainly observed on the plasma membrane, which is directly stabilized by the cytoskeleton. Since cytoskeleton proteins are osmosensitive and thermosensitive, the aim of this study was to evaluate the damage caused to the bull sperm cytoskeleton by cryopreservation (freezing-thawing). Fresh and frozen-thawed bull semen samples were exposed to a treatment with the neutral detergent Brij 36-T. Electron microscopy evidenced important damages at the sperm perinuclear theca after the protein extraction protocol; the perinuclear theca was partially solubilized, the perinuclear theca substructure disappeared in the cryopreserved samples. Furthermore, the sperm head's shape was significantly altered on the cryopreserved samples. Fluorescence analysis showed a decrease of the intensity of actin and dystrobrevin on the frozen-thawed samples. Western blot assays revealed a stronger signal for actin and β-dystrobrevin in the frozen-thawed sperm samples than in the fresh ones. Our results suggest that the cryopreservation process highly alters the sperm cytoskeleton stability, causing its proteins to become more fragile and therefore more susceptible to be extracted.
Collapse
|
14
|
Peña FJ, García BM, Samper JC, Aparicio IM, Tapia JA, Ferrusola CO. Dissecting the molecular damage to stallion spermatozoa: the way to improve current cryopreservation protocols? Theriogenology 2011; 76:1177-86. [PMID: 21835453 DOI: 10.1016/j.theriogenology.2011.06.023] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 06/06/2011] [Accepted: 06/16/2011] [Indexed: 02/07/2023]
Abstract
We review recent developments in the technology of freezing stallion sperm, paying special attention to the molecular lesions that spermatozoa suffer during freezing and thawing, such as osmotic stress, oxidative damage, and apoptotic changes. We also discuss the applicability of colloidal centrifugation in stallion sperm cryobiology. Increased knowledge about the molecular injuries that occur during cryopreservation may lead to improved protective techniques and thus to further improvements in fertility in the current decade.
Collapse
Affiliation(s)
- F J Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura Cáceres, Spain.
| | | | | | | | | | | |
Collapse
|
15
|
|