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Negus C, Pinyopummin A, Mahasawangkul S, Hobbs R, Bathgate R. Asian elephant ( Elephas maximus) seminal plasma: establishing the proteome and effect on spermatozoa when added to cryomedium. Reprod Fertil Dev 2024; 36:RD23217. [PMID: 39052858 DOI: 10.1071/rd23217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 06/27/2024] [Indexed: 07/27/2024] Open
Abstract
Context The removal or supplementation of ejaculates with seminal plasma (SP) can affect cryotolerance and post-thaw survival of spermatozoa in many species. In the Asian elephant (Elephas maximus ), elucidation of the SP proteome and investigation of how it affects spermatozoa may enable improvement of cryopreservation protocols. Aims Herein, we characterise the Asian elephant SP proteome and investigate the impacts of SP on sperm cryotolerance in the presence of conspecific or heterospecific SP. Methods Proteomic analysis of Asian elephant SP was performed using mass spectrometry on nine samples from three individuals. In a separate study, SP was removed from six ejaculates and spermatozoa were resuspended in Tris extender supplemented with: no seminal plasma (NOSP), conspecific SP from ejaculates exhibiting 'good' (GSP, >60%) or mixed sperm total motility (MSP), or horse SP (HSP). Samples underwent cryopreservation, and sperm parameters were compared prior to cryopreservation and after thawing (0 and 2h). Key results Mass spectrometry identified 155 proteins from an array of families. Significant differences were observed in post-thaw sperm quality between SP treatments: high concentrations of MSP (25%, v/v) displayed greater average path and straight-line velocity immediately after thawing (P P P Conclusions and implications These preliminary findings suggest the potential of SP to enhance the cryosurvival of Asian elephant spermatozoa, with HSP showing particularly promising results compared to conspecific SP (GSP). Further research into the specific effects of Asian elephant SP proteins is warranted.
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Affiliation(s)
- Cameron Negus
- Faculty of Science, Sydney School of Veterinary Science, The University of Sydney, Sydney, NSW, Australia
| | - Anuchai Pinyopummin
- Faculty of Veterinary Medicine, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand
| | | | - Rebecca Hobbs
- Taronga Institute of Science and Learning, Dubbo, NSW, Australia
| | - Roslyn Bathgate
- Faculty of Science, Sydney School of Veterinary Science, The University of Sydney, Sydney, NSW, Australia
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2
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Alim S, Laitaoja M, Pawar SS, Talluri TR, Jänis J, Swamy MJ. Primary structure determination and physicochemical characterization of DSP-3, a phosphatidylcholine binding glycoprotein of donkey seminal plasma. Int J Biol Macromol 2023; 239:124229. [PMID: 36990412 DOI: 10.1016/j.ijbiomac.2023.124229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/11/2023] [Accepted: 03/25/2023] [Indexed: 03/30/2023]
Abstract
Major proteins of the seminal plasma in a variety of mammals such as bovine PDC-109, equine HSP-1/2, and donkey DSP-1 contain fibronectin type-II (FnII) domains and are referred to as FnII family proteins. To further our understanding on these proteins, we carried out detailed studies on DSP-3, another FnII protein of donkey seminal plasma. High-resolution mass-spectrometric studies revealed that DSP-3 contains 106 amino acid residues and is heterogeneously glycosylated with multiple acetylations on the glycans. Interestingly, DSP-3 exhibits significantly higher homology to HSP-1 (104 identical residues) than DSP-1 (72 identical residues). Circular dichroism (CD) spectroscopic and differential scanning calorimetric (DSC) studies showed that DSP-3 unfolds at ~45 °C and binding of phosphorylcholine (PrC) - the head group moiety of choline phospholipids - increases the thermal stability. Analysis of DSC data suggested that unlike PDC-109 and DSP-1, which exist as mixtures of polydisperse oligomers, DSP-3 most likely exists as a monomer. Ligand binding studies monitoring changes in protein intrinsic fluorescence indicated that DSP-3 binds lyso-phosphatidylcholine (Ka = 1.08 × 105 M-1) with ~80-fold higher affinity than PrC (Ka = 1.39 × 103 M-1). Binding of DSP-3 to erythrocytes leads to membrane perturbation, suggesting that its binding to sperm plasma membrane could be physiologically significant.
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Affiliation(s)
- Sk Alim
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Mikko Laitaoja
- Department of Chemistry, University of Eastern Finland, FI-80101 Joensuu, Finland
| | - Sonali S Pawar
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | | | - Janne Jänis
- Department of Chemistry, University of Eastern Finland, FI-80101 Joensuu, Finland
| | - Musti J Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India.
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3
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Griffin RA, Swegen A, Baker MA, Ogle RA, Smith N, Aitken RJ, Skerrett-Byrne DA, Fair S, Gibb Z. Proteomic analysis of spermatozoa reveals caseins play a pivotal role in preventing short-term periods of subfertility in stallions. Biol Reprod 2022; 106:741-755. [DOI: 10.1093/biolre/ioab225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 08/29/2021] [Accepted: 09/23/2021] [Indexed: 11/14/2022] Open
Abstract
Abstract
Stallions experience transient fluctuations in fertility throughout the breeding season. Considering pregnancy diagnoses cannot be ascertained until ~14 days post-breeding, the timely detection of decreases in stallion fertility would enhance industry economic and welfare outcomes. Therefore, this study aimed to identify the proteomic signatures reflective of short-term fertility fluctuations, and to determine the biological mechanisms governing such differences. Using LC–MS/MS, we compared the proteomic profile of semen samples collected from commercially “fertile” stallions, during high- and low-fertility periods. A total of 1702 proteins were identified, of which, 38 showed a significant change in abundance (p ≤ 0.05). Assessment of intra- and inter-stallion variability revealed that caseins (namely κ-, α-S1-, and α-S2-casein), were significantly more abundant during “high-fertility” periods, while several epididymal, and seminal plasma proteins (chiefly, epididymal sperm binding protein 1 [ELSPbP1], horse seminal plasma protein 1 [HSP-1] and clusterin), were significantly more abundant during “low-fertility” periods. We hypothesised that an increased abundance of caseins offers greater protection from potentially harmful seminal plasma proteins, thereby preserving cell functionality and fertility. In vitro exposure of spermatozoa to casein resulted in decreased levels of lipid scrambling (Merocyanine 540), higher abundance of sperm-bound caseins (α-S1-, α-S2-, and κ-casein), and lower abundance of sperm-bound HSP-1 (p ≤ 0.05). This study demonstrates key pathways governing short-term fertility fluctuations in the stallion, thereby providing a platform to develop robust, fertility assessment strategies into the future.
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Affiliation(s)
- Róisín Ann Griffin
- Priority Research Centre for Reproductive Science, University of Newcastle, New South Wales, Australia
| | - Aleona Swegen
- Priority Research Centre for Reproductive Science, University of Newcastle, New South Wales, Australia
- Nuffield Department of Women’s and Reproductive Health, University of Oxford, Oxford, United Kingdom
| | - Mark A Baker
- Priority Research Centre for Reproductive Science, University of Newcastle, New South Wales, Australia
| | - Rachel Ann Ogle
- Priority Research Centre for Reproductive Science, University of Newcastle, New South Wales, Australia
| | - Nathan Smith
- Analytical and Biomedical Research Facility, Research Division, University of Newcastle, Callaghan, New South Wales, Australia
| | - Robert John Aitken
- Priority Research Centre for Reproductive Science, University of Newcastle, New South Wales, Australia
| | - David Anthony Skerrett-Byrne
- Priority Research Centre for Reproductive Science, University of Newcastle, New South Wales, Australia
- Pregnancy and Reproduction Program, Hunter Medical Research Institute, New South Wales, Australia
| | - Sean Fair
- Laboratory of Animal Reproduction, Department of Biological Sciences, Biomaterials Research Cluster, Bernal Institute, University of Limerick, Limerick, Ireland
| | - Zamira Gibb
- Priority Research Centre for Reproductive Science, University of Newcastle, New South Wales, Australia
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4
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Alim S, Cheppali SK, Laitaoja M, Talluri TR, Jänis J, Swamy MJ. Purification, molecular characterization and ligand binding properties of the major donkey seminal plasma protein DSP-1. Int J Biol Macromol 2022; 194:213-222. [PMID: 34863837 DOI: 10.1016/j.ijbiomac.2021.11.177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 12/31/2022]
Abstract
Fibronectin type-II (FnII) family proteins are the major proteins in many mammalian species including bull, horse and pig. In the present study, a major FnII protein has been identified and isolated from donkey (Equus hemionus) seminal plasma, which we refer to as Donkey Seminal Plasma protein-1 (DSP-1). The amino acid sequence determined by mass spectrometry and computational modeling studies revealed that DSP-1 is homologous to other mammalian seminal plasma proteins, including bovine PDC-109 (also known as BSP-A1/A2) and equine HSP-1/2. High-resolution LC-MS analysis indicated that the protein is heterogeneously glycosylated and also contains multiple acetylations, occurring in the attached glycans. Structural and thermal stability studies on DSP-1 employing CD spectroscopy and differential scanning calorimetry showed that the protein unfolds at ~43 °C and binding to phosphorylcholine (PrC) - the head group moiety of choline phospholipids - increases its thermal stability. Intrinsic fluorescence titrations revealed that DSP-1 recognizes lyso-phosphatidylcholine with over 100-fold higher affinity than PrC. Further, interaction of DSP-1 with erythrocytes, a model cell membrane, revealed that DSP-1 binding is mediated by a specific interaction with choline phospholipids and results in membrane perturbation, suggesting that binding of this protein to sperm plasma membrane could be physiologically significant.
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Affiliation(s)
- Sk Alim
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | | | - Mikko Laitaoja
- Department of Chemistry, University of Eastern Finland, FI-80101 Joensuu, Finland
| | | | - Janne Jänis
- Department of Chemistry, University of Eastern Finland, FI-80101 Joensuu, Finland
| | - Musti J Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India.
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5
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Gaitskell-Phillips G, Martín-Cano FE, Ortiz-Rodríguez JM, Silva-Rodríguez A, Rodríguez-Martínez H, Gil MC, Ortega-Ferrusola C, Peña FJ. Seminal plasma AnnexinA2 protein is a relevant biomarker for stallions which require removal of seminal plasma for sperm survival upon refrigeration†. Biol Reprod 2020; 103:1275-1288. [PMID: 32857155 DOI: 10.1093/biolre/ioaa153] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/31/2020] [Accepted: 08/26/2020] [Indexed: 12/11/2022] Open
Abstract
Some stallions yield ejaculates that do not tolerate conservation by refrigeration prior to artificial insemination (AI), showing improvement after removal of most of the seminal plasma (SP) by centrifugation. In this study, the SP-proteome of 10 different stallions was defined through high-performance liquid chromatography with tandem mass spectrometry and bioinformatic analysis in relation to the ability of the ejaculates to maintain semen quality when cooled and stored at 5°C. Stallions were classified into three groups, depending on this ability: those maintaining good quality after direct extension in a commercial extender (good), stallions requiring removal of seminal plasma (RSP) to maintain seminal quality (good-RSP), and stallions, unable to maintain good semen quality even after RSP (poor). Pathway enrichment analysis of the proteins identified in whole equine SP using human orthologs was performed using g: profiler showing enriched Reactome and the Kyoto Encyclopedia of Genes and Genomes pathways related to hexose metabolism, vesicle mediated transport, post translational modification of proteins and immune response. Specific proteins overrepresented in stallions tolerating conservation by refrigeration included a peroxiredoxin-6 like protein, and transcobalamin-2, a primary vitamin B12-binding, and transport protein. Also, the protein involved in protein glycosylation, ST3 beta-galactoside alpha-2,3-sialyltransferase 1 was present in good stallions. These proteins were nearly absent in poor stallions. Particularly, annexinA2 appeared as to be the most powerful discriminant variable for identification of stallions needing RSP prior to refrigeration, with a P = 0.002 and a q value = 0.005. Overall this is the first detailed study of the equine SP-proteome, showing the potential value of specific proteins as discriminant bio-markers for clinical classification of stallions for AI.
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Affiliation(s)
- Gemma Gaitskell-Phillips
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Francisco E Martín-Cano
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - José M Ortiz-Rodríguez
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Antonio Silva-Rodríguez
- Facility of Innovation and Analysis in Animal Source Foodstuffs, University of Extremadura, Cáceres, Spain
| | - Heriberto Rodríguez-Martínez
- Department of Biomedical and Clinical Sciences (BKV), Faculty of Medicine & Health Sciences, Linköping University, Linköping, Sweden
| | - Maria C Gil
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Cristina Ortega-Ferrusola
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Fernando J Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
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6
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Guasti PN, Souza FF, Scott C, Papa PM, Camargo LS, Schmith RA, Monteiro GA, Hartwig FP, Papa FO. Equine seminal plasma and sperm membrane: Functional proteomic assessment. Theriogenology 2020; 156:70-81. [PMID: 32679458 DOI: 10.1016/j.theriogenology.2020.06.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/06/2020] [Accepted: 06/13/2020] [Indexed: 10/24/2022]
Abstract
During ejaculation, a large amount of seminal plasma proteins interact with the sperm membrane, leading to a series of biochemical and structural changes implicated in sperm function and gamete interaction. However, the roles of the majority of these proteins remain unknown. This study aimed to investigate the proteome and functionality of the major equine proteins of seminal plasma and the sperm membrane. Seminal plasma and enriched-membrane proteins (150 μg) were separated by two-dimensional gel electrophoresis, and the respective maps were analyzed. Protein identification was performed by in-gel digestion and tandem mass spectrometry (GeLC-MS/MS). Samples were also submitted to in-solution digestion (complex protein mixture) and identified by shotgun analysis by LC-MS/MS; bioinformatic tools were used to investigate protein functions. Seminal plasma and sperm membrane extract maps contained 91.0 ± 8.2 spots and 245.3 ± 11.3 spots, respectively, within the 3-10 pH range. In total, the most abundant proteins identified in 2D maps and in complex protein mixtures included 24 proteins for seminal plasma and 33 for sperm membrane extract, with a high degree of confidence (P < 0.05). Of these, HSP1, CRISP3 and KLK1E2 were the most abundant in seminal plasma; HSP1 was highly abundant in sperm membrane extract, in many isoforms, which is related to membrane destabilization and may compromise sperm preservation. HSP1-polybromo-1 interactions suggested a role in DNA stabilization. Prosaposin was identified in seminal plasma and may play a role in the fertilization process. IZUMO4, a member of the IgSF family involved in the prefertilization stages, was identified in 2D gel and MS/MS analysis of sperm membrane extract. Ten proteins of seminal plasma were found to interact with the sperm membrane and were related to binding and catalytic activities (clusterin, CRISP3, epididymal sperm-binding protein 1, kallikrein1E2, seminal plasma protein A3, and HSP1). Additionally, other identified proteins were associated with DNA integrity, capacitation and recognition of pregnancy. These findings indicate that the binding of specific proteins to the plasma membrane during ejaculation may influence sperm survival after cryopreservation and may play a role in decreasing the quality in stallions with toxic seminal plasma. Elucidation of these interactions is an important step in understanding the biological processes related to equine fertility and facilitates future investigations on the selection and application of low freezability semen strategies.
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Affiliation(s)
- P N Guasti
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, FMVZ, São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - F F Souza
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, FMVZ, São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - C Scott
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, FMVZ, São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - P M Papa
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, FMVZ, São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - L S Camargo
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, FMVZ, São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - R A Schmith
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, FMVZ, São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - G A Monteiro
- Department of Veterinary Clinic and Surgery, School of Veterinary Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - F P Hartwig
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, FMVZ, São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - F O Papa
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, FMVZ, São Paulo State University (UNESP), Botucatu, SP, Brazil.
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7
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Albrizio M, Lacalandra GM, Volpe S, Nicassio M, Cinone M. Heat SHOCK proteins in equine spermatozoa: Expression and correlation to kinetic and environmental parameters. Theriogenology 2020; 155:185-196. [PMID: 32711220 DOI: 10.1016/j.theriogenology.2020.05.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 05/28/2020] [Accepted: 05/29/2020] [Indexed: 11/19/2022]
Abstract
Heat Shock Proteins are chaperones primary involved in the repair of cellular damages induced by temperature. The harmful effect of temperature on the male gonad is well known, on the contrary knowledge on the effects of the environment on semen quality are still insufficient. The aim of this paper was to learn more about the role of HSPs and the environment in modulating the physiology of equine male gonads. We showed a detailed analysis of equine semen characteristic and the expression level of three HSPs (60-70-90) over a one-year period analyzing the effects of temperature and humidity and the correlation among the different variables. We showed also that the interpretation of results depends strongly on the way in which data are assembled and analyzed, therefore we compared results obtained from three different ways of grouping: according to single months, to weather seasons and to mare reproductive periods. Results showed that the expression of the three HSPs is correlated to the environment through temperature and humidity and that it reaches the highest level in the breeding season and in summer. We found also that HSPs expression is correlated to some variables describing the quality of equine semen (concentration) and the kinetic of spermatozoa (total motility-MOT, %, average path velocity -VAP, μm/s- and lateral head displacement -ALH, μm). No correlation was found between HSPs expression and the mitochondrial membrane potential; while viability and HSP90 expression resulted positively correlated. The month-by-month analysis evidenced that in February equine semen has the highest kinetic characteristics (increased linearity -LIN, %-, straightness -STR, % -and average path velocity -VAP, μm/s) with the highest number of motile, progressive motile and rapid cells. These results may have a great impact in the comprehension of functional aspects of the physiology of equine semen and may have potential implications for breeders who want to understand the period (and/or month) of the year in which equine semen reaches the best characteristics with increased chances for better results in reproductive practice.
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Affiliation(s)
- M Albrizio
- Department of Emergency and Organs Transplantation, Italy.
| | - G M Lacalandra
- Department of Veterinary Medicine University of Bari-Aldo Moro, Italy
| | - S Volpe
- Interdisciplinary Department of Medicine, University of Bari-Aldo Moro, Italy
| | - M Nicassio
- Prevention Department-Veterinary service, area A of the Local Healthcare (ASL), Bari, Italy
| | - M Cinone
- Department of Emergency and Organs Transplantation, Italy
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Abstract
During ejaculation and deposition in the female genital tract, spermatozoa are exposed to seminal plasma, a mix of secretions primarily from the accessory sex glands. Proteins, which make up the largest contribution to seminal plasma by weight, have been the focus of much interest, in particular the identification of specific proteins both in the plasma and/or found bound to the sperm surface post ejaculation. Global proteomic studies of seminal plasma originating from a range of species over the last 15 years have revealed their hitherto unknown diversity and complexity. Seminal plasma is generally known to aid sperm survival and fertility in a range of species and studies have begun to reveal its link with sperm function and identification, as markers of fertility. This review summarises recent data on proteins found on the sperm surface that originate from seminal plasma and have subsequently been shown to correlate with fertility, with a focus on the pig.
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Neuhauser S, Bollwein H, Siuda M, Handler J. Comparison of the Effects of Five Semen Extenders on the Quality of Frozen-Thawed Equine Epididymal Sperm. J Equine Vet Sci 2019; 79:1-8. [PMID: 31405486 DOI: 10.1016/j.jevs.2019.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/01/2019] [Accepted: 05/01/2019] [Indexed: 11/26/2022]
Abstract
Cryopreservation of epididymal sperm allows the saving of genetic material in case of unexpected death or emergency castration. The aim of the present study was the comparison of five different combinations of extenders commercially available for equine frozen semen processing for cryopreservation of epididymal sperm. Epididymal sperm were harvested from gonads of 10 healthy stallions after routine castration by retrograde flush technique. Then, samples were split and diluted with (1) INRA96 + INRA Freeze, (2) BotuSemen + BotuCRIO, (3) EquiPlus + Gent Freeze, (4) EquiPlus + EquiPlus Freeze, and (5) Gent + Gent Freeze. Extenders 1 and 2 showed higher values for total and progressive motility after thawing compared with extender 4 (P < .05). Extender 3 was in between 1 and 2 (P > .05), and extender 5 resulted in the lowest values (P < .05). The subpopulation of viable frozen-thawed sperm with high mitochondrial membrane potential and low intracellular calcium content was higher using extender 1 compared with extenders 3, 4, and 5 (P < .05) and higher in extender 2 compared with extenders 4 and 5 immediately after thawing (P < .05). After 1 hour of incubation, this subpopulation yielded the highest values in extender 2 (P < .05). Immediately after thawing, extender 1 yielded higher values for percentage of DFI and mean DFI than extenders 3, 4, and 5 (P < .05). Following 1 hour of incubation after thawing, sperm processed with extender 1 resulted in the highest values for percentage of DFI and mean DFI (P < .05). Using extender 2, mean DFI values were lower than those in extender 1 and higher than the extenders 3, 4, and 5 (P < .05). The study revealed that according to the examined sperm quality parameters, freezing extenders (extender 1, extender 2) using low concentrations of glycerol either combined with or without methylformamide were beneficial for cryopreservation of stallion epididymal sperm. For processing of stallion epididymal sperm, an extender containing milk proteins (extenders 1-4) for initial dilution after sperm harvesting is preferable to an extender including egg yolk (extender 5).
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Affiliation(s)
- Stefanie Neuhauser
- Pferdezentrum Bad Saarow, Equine Reproduction Unit, Freie Universität Berlin, Bad Saarow, Germany
| | - Heinrich Bollwein
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Matthias Siuda
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Johannes Handler
- Pferdezentrum Bad Saarow, Equine Reproduction Unit, Freie Universität Berlin, Bad Saarow, Germany.
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10
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Druart X, de Graaf S. Seminal plasma proteomes and sperm fertility. Anim Reprod Sci 2018; 194:33-40. [PMID: 29657075 DOI: 10.1016/j.anireprosci.2018.04.061] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 03/19/2018] [Accepted: 04/08/2018] [Indexed: 02/07/2023]
Abstract
During ejaculation, the spermatozoa are transported by the seminal plasma, a fluid resulting from secretions originating mainly from the prostate and the seminal vesicles in mammals. The interaction of the seminal plasma with spermatozoa induces binding of seminal proteins onto the sperm surface and membrane remodeling potentially impacting the sperm transport, survival and fertilizing ability in the female genital tract. The seminal plasma also contains peptides and proteins involved in the inflammatory and immune response of the female tract. Therefore the seminal plasma proteome has been investigated in a large range of taxa, including mammals, birds, fishes and insect species. The association of the seminal plasma with semen preservation or fertility identified proteic markers of seminal plasma function in domestic species. This review summarizes the current knowledge in seminal plasma proteomes and proteic markers of sperm preservation in animal species.
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Affiliation(s)
- Xavier Druart
- Physiologie de la Reproduction et du Comportement, INRA, CNRS, IFCE, Université de Tours, 37380 Nouzilly, France.
| | - Simon de Graaf
- RMC Gunn Building (B19), Faculty of Veterinary Science, The University of Sydney, Camperdown, NSW 2006, Australia
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Defaus S, Avilés M, Andreu D, Gutiérrez-Gallego R. Lectin-Binding Specificity of the Fertilization-Relevant Protein PDC-109 by Means of Surface Plasmon Resonance and Carbohydrate REcognition Domain EXcision-Mass Spectrometry. Int J Mol Sci 2018; 19:ijms19041076. [PMID: 29617298 PMCID: PMC5979539 DOI: 10.3390/ijms19041076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/20/2018] [Accepted: 03/31/2018] [Indexed: 12/18/2022] Open
Abstract
Seminal plasma proteins are relevant for sperm functionality and some appear responsible for establishing sperm interactions with the various environments along the female genital tract towards the oocyte. In recent years, research has focused on characterizing the role of these proteins in the context of reproductive biology, fertility diagnostics and treatment of related problems. Herein, we focus on the main protein of bovine seminal plasma, PDC-109 (BSP-A1/-A2), which by virtue of its lectin properties is involved in fertilization. By means of surface plasmon resonance, the interaction of PDC-109 with a panel of the most relevant glycosidic epitopes of mammals has been qualitatively and quantitatively characterized, and a higher affinity for carbohydrates containing fucose has been observed, in line with previous studies. Additionally, using the orthogonal technique of Carbohydrate REcognition Domain EXcision-Mass Spectrometry (CREDEX-MS), the recognition domain of the interaction complexes between PDC-109 and all fucosylated disaccharides [(Fuc-α1,(3,4,6)-GlcNAc)] has been defined, revealing the specific glycotope and the peptide domain likely to act as the PDC-109 carbohydrate binding site.
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Affiliation(s)
- Sira Defaus
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research Park, 08003 Barcelona, Spain.
| | - Manuel Avilés
- Department of Cell Biology and Histology, School of Medicine, University of Murcia and IMIB-Arrixaca, Campus Mare Nostrum, 30071 Murcia, Spain.
| | - David Andreu
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research Park, 08003 Barcelona, Spain.
| | - Ricardo Gutiérrez-Gallego
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research Park, 08003 Barcelona, Spain.
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Kumar CS, Singh BP, Alim S, Swamy MJ. Factors Influencing the Chaperone-Like Activity of Major Proteins of Mammalian Seminal Plasma, Equine HSP-1/2 and Bovine PDC-109: Effect of Membrane Binding, pH and Ionic Strength. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1112:53-68. [DOI: 10.1007/978-981-13-3065-0_5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Divyashree BC, Roy SC. Species-specific and differential expression of BSP-5 and other BSP variants in normozoospermic and asthenozoospermic buffalo (Bubalus bubalis) and cattle (Bos taurus) seminal plasma. Theriogenology 2017; 106:279-286. [PMID: 29100133 DOI: 10.1016/j.theriogenology.2017.10.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 09/16/2017] [Accepted: 10/07/2017] [Indexed: 01/05/2023]
Abstract
Binder of sperm-5 (BSP-5) is one of the fertility-associated proteins of cattle seminal plasma. Binding of sperm to the oviductal epithelium is mediated by BSP group of proteins. However, it is not clear, whether this protein is also involved in sperm motility. In the present study, attempts were made to characterize BSP-5 protein in both normozoospermic (NS) and asthenozoospermic (AS) Murrah buffalo (n = 18; Bubalus bubalis), Holstein Friesian (n = 8, Bos taurus) and Jersey cattle (n = 8; Bos taurus) bull seminal plasma and also study its expression pattern in these species. 1-D Western blot demonstrated three major BSP-5 immunoreactive protein bands (24.2 kDa, 20.5 kDa, and 12.3 kDa) in buffalo seminal plasma. Of these, the intensities of 24.2 and 20.5 kDa protein bands reduced significantly (P ≤ 0.05) in seminal plasma of AS group compared to that of NS group. On the contrary, the expression of 12.3 kDa protein band did not vary significantly between the groups. In Holstein Friesian seminal plasma, at least six BSP-5 immunoreactive protein bands (25.1, 23.6, 19.5, 13.8, 13.1 and 12.3 kDa) could be detected. Of these, the intensities of 23.6, 13.8/13.1 and 12.3 kDa protein bands decreased (P = 0.058, 0.111, 0.053) in AS group bulls compared to NS bulls. Holstein Friesian bull seminal plasma demonstrated a BSP-5 immunoreactive duplex protein band of 13.8/13.1 kDa, which was not evident in buffalo seminal plasma. In 2-D Western blot, a train of five BSP-5 immunoreactive duplex protein spots (Mr 21.0-27.6 kDa, pI of ∼3.9-5.1) was detected. Mass spectrometry of one of the representative duplex spot confirmed that these were BSP-5 and BSP-3 proteins, respectively. Indirect immunofluorescence studies showed that BSP-5 is primarily localized to the mid-piece/mitochondrial region of buffalo spermatozoa. To conclude, the findings of the present study could establish the significance and association of BSP-5 proteins in sperm motility and how their level differ in semen from two different clinical groups of buffalo bull (NS vs. AS). Further, the study also demonstrated that the expression pattern of BSP-5 and other BSP variants in seminal plasma of bulls is species-specific.
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Affiliation(s)
- B C Divyashree
- Molecular Biology Laboratory, ICAR-National Institute of Animal Nutrition and Physiology, Hosur Road, Adugodi, Bangalore 560030, India; Department of Biochemistry, Centre for Post Graduate Studies, Jain University, Jayanagar 3rd Block, Bangalore 560011, India
| | - Sudhir C Roy
- Molecular Biology Laboratory, ICAR-National Institute of Animal Nutrition and Physiology, Hosur Road, Adugodi, Bangalore 560030, India.
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Kumar CS, Swamy MJ. Modulation of chaperone-like and membranolytic activities of major horse seminal plasma protein HSP-1/2 by l-carnitine. J Biosci 2017; 42:469-479. [DOI: 10.1007/s12038-017-9693-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Differential modulation of the chaperone-like activity of HSP-1/2, a major protein of horse seminal plasma by anionic and cationic surfactants. Int J Biol Macromol 2016; 96:524-531. [PMID: 28013009 DOI: 10.1016/j.ijbiomac.2016.12.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 12/19/2016] [Indexed: 11/24/2022]
Abstract
The major protein of equine seminal plasma, HSP-1/2 exhibits chaperone-like activity (CLA) by protecting various target proteins against thermal, chemical and oxidative stress. Polydispersity and surface hydrophobicity of HSP-1/2 were found to be important for its CLA. Surfactants are known to alter certain properties of proteins, e.g. hydrophobicity, charge and conformation either by altering properties of the medium or by direct binding. In the current study, thermal aggregation of alcohol dehydrogenase (ADH) and enolase has been studied in the presence of HSP-1/2, different surfactants and their combinations. The results obtained show that anionic surfactants (SDS, sodium dodecyl benzene sulfate) and neutral surfactants (tween-20, triton X-100) increase the CLA of HSP-1/2 and also inhibit aggregation of the target proteins independently. On the other hand, cationic surfactants (CTAB, alanine palmityl ester) increased the thermal aggregation of ADH and enolase and also decreased the CLA of HSP-1/2. These results are of significant interest as they show that surfactants such as SDS and tween-20 can potentially be used as anti-aggregation agents to prevent thermal aggregation of target proteins.
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Kumar CS, Swamy MJ. A pH Switch Regulates the Inverse Relationship between Membranolytic and Chaperone-like Activities of HSP-1/2, a Major Protein of Horse Seminal Plasma. Biochemistry 2016; 55:3650-7. [DOI: 10.1021/acs.biochem.5b01374] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Sudheer Kumar
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Musti J. Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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Kumar CS, Swamy MJ. HSP-1/2, a major horse seminal plasma protein, acts as a chaperone against oxidative stress. Biochem Biophys Res Commun 2016; 473:1058-1063. [DOI: 10.1016/j.bbrc.2016.04.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Accepted: 04/04/2016] [Indexed: 02/08/2023]
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Fluorescence investigations on choline phospholipid binding and chemical unfolding of HSP-1/2, a major protein of horse seminal plasma. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 158:89-98. [DOI: 10.1016/j.jphotobiol.2016.02.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 02/08/2016] [Accepted: 02/11/2016] [Indexed: 11/20/2022]
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Effect of different media additives on capacitation of frozen–thawed ram spermatozoa as a potential replacement for estrous sheep serum. Theriogenology 2015; 84:948-55. [DOI: 10.1016/j.theriogenology.2015.05.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 05/22/2015] [Accepted: 05/29/2015] [Indexed: 11/21/2022]
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Evolution and function of mammalian binder of sperm proteins. Cell Tissue Res 2015; 363:105-127. [DOI: 10.1007/s00441-015-2289-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 08/26/2015] [Indexed: 01/28/2023]
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Plante G, Lusignan MF, Lafleur M, Manjunath P. Interaction of milk proteins and Binder of Sperm (BSP) proteins from boar, stallion and ram semen. Reprod Biol Endocrinol 2015; 13:92. [PMID: 26272219 PMCID: PMC4536704 DOI: 10.1186/s12958-015-0093-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 08/06/2015] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Mammalian semen contains a family of closely related proteins known as Binder of SPerm (BSP proteins) that are added to sperm at ejaculation. BSP proteins extract lipids from the sperm membrane thereby extensively modifying its composition. These changes can ultimately be detrimental to sperm storage. We have demonstrated that bovine BSP proteins interact with major milk proteins and proposed that this interaction could be the basis of sperm protection by milk extenders. In the present study, we investigated if homologous BSP proteins present in boar, stallion and ram seminal plasma display a similar affinity for the milk proteins in order to assess whether the mechanism of sperm protection by milk for these species could be general. METHODS Skim milk was incubated with seminal plasma proteins (boar, stallion and ram), chromatographed on a Sepharose CL-4B column and protein fractions were analyzed by immunoblotting. RESULTS Boar, stallion and ram BSP proteins displayed affinity for a milk protein fraction (F1) mainly composed of α-lactalbumin, β-lactoglobulin, and κ-casein. They also had affinity for another milk protein fraction (F2) composed mostly of casein micelles. However, stallion BSP showed higher affinity for the fraction (F1). CONCLUSIONS These results further extend our view that the association of BSP proteins with milk proteins could be a general feature of the mechanism of mammalian sperm protection by milk to prevent detrimental effect of prolonged exposure of sperm to seminal plasma.
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Affiliation(s)
- Geneviève Plante
- Department of Medicine, Université de Montréal, C.P. 6128, Succ. Centre Ville, Montréal, Québec, Canada, H3C 3J7.
- Maisonneuve-Rosemont Hospital Research Center, 5415 L'Assomption blvd, Montréal, Québec, Canada, H1T 2M4.
| | - Marie-France Lusignan
- Department of Medicine, Université de Montréal, C.P. 6128, Succ. Centre Ville, Montréal, Québec, Canada, H3C 3J7.
- Maisonneuve-Rosemont Hospital Research Center, 5415 L'Assomption blvd, Montréal, Québec, Canada, H1T 2M4.
| | - Michel Lafleur
- Department of Chemistry, Center for Self-Assembled Chemical Structures, Université de Montréal, C.P. 6128, Succ. Centre Ville, Montréal, Québec, Canada, H3C 3J7.
| | - Puttaswamy Manjunath
- Department of Medicine, Université de Montréal, C.P. 6128, Succ. Centre Ville, Montréal, Québec, Canada, H3C 3J7.
- Maisonneuve-Rosemont Hospital Research Center, 5415 L'Assomption blvd, Montréal, Québec, Canada, H1T 2M4.
- Puttaswamy Manjunath, Maisonneuve-Rosemont Hospital Research Center, 5415 L'Assomption blvd, Montréal, Québec, Canada, H1T 2M4.
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Jois PS, Plante G, Thérien I, Manjunath P. Functional characterization of the domains of the bovine binder of SPerm 5 (BSP5) protein. Reprod Biol Endocrinol 2015; 13:64. [PMID: 26084664 PMCID: PMC4476173 DOI: 10.1186/s12958-015-0058-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 06/02/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bovine BSP5 is a multifunctional protein primarily involved in sperm capacitation. BSP5 consists of long N-terminal part followed by two similar and highly conserved fibronectin type II domains designated A and B. METHODS In order to assess the role of these domains in the sperm binding and capacitation processes, we created recombinant individual domains (N, A, B), series of overlapping domains (NA and AB) and full-length BSP5 in an Escherichia coli expression system. The recombinant constructs were also tested for their ability to interact with ligands such as gelatine, heparin, chondroitin sulphate B and phosphatidylcholine liposomes by affinity chromatography and co-sedimentation studies. RESULTS With the exception of the N domain, all recombinant constructs retained gelatine, phosphatidylcholine, heparin and chondroitin sulphate B binding activities. Domain-wise studies showed clearly that AB domain is capable of performing its biological functions as well as the full-length protein, as it was able to potentiate heparin-mediated sperm capacitation. CONCLUSIONS These results indicate that the C-terminal domain composed of two Fn2 domains is sufficient and crucial to maintain the biological functions of BSP proteins. The N-terminal part of the protein did not bind to any of known BSP5-ligands including epididymal sperm and did not seem to be required for either sperm binding or sperm capacitation. This study also confirmed that glycosylation is not required for BSP-mediated sperm capacitation or any of the binding characteristics displayed by BSP5.
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Affiliation(s)
| | - Geneviève Plante
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, QC, Canada.
- Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Quebec, Canada.
| | - Isabelle Thérien
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, QC, Canada.
| | - Puttaswamy Manjunath
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, QC, Canada.
- Department of Biochemistry and Molecular Medicine, Faculty of Medicine, University of Montreal, Quebec, Canada.
- Department of Medicine, Faculty of Medicine, University of Montreal, Quebec, Canada.
- Maisonneuve-Rosemont Hospital Research Center, 5415 l'Assomption blvd, Montreal, QC, H1T 2 M4, Canada.
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Plante G, Manjunath P. Murine binder of sperm protein homolog 1: a new player in HDL-induced capacitation. Reproduction 2015; 149:367-76. [DOI: 10.1530/rep-14-0559] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Binder of sperm (BSP) proteins are ubiquitous among mammals and are exclusively expressed in male genital tract. The main function associated with BSP proteins is their ability to promote sperm capacitation. In mice, two proteins (BSP protein homolog 1 (BSPH1) and BSPH2) have been studied. Using recombinant strategies, BSPH1 was found to bind to epididymal sperm membranes and promote sperm capacitation in vitro. The goal of this study was to evaluate the role of native murine BSPH1 protein in sperm capacitation induced by BSA and HDLs. The effect of antibodies, antigen-binding fragments (Fabs), and F(ab′)2 specific for murine BSPH1 on BSA- and HDL-induced capacitation was tested. Results indicate that BSPH1 has no direct role in BSA-induced capacitation. However, antibodies, Fabs, and F(ab′)2 could block capacitation induced by HDLs and could inhibit the HDL-induced increase in tyrosine phosphorylation, suggesting a specific interaction between HDLs and BSPH1. Results indicate that murine BSPH1 proteins in mice could be a new important piece of the puzzle in sperm capacitation induced by HDLs. As murine BSPH1 is orthologous to human BSPH1, this study could also lead to new insights into the functions and the importance of the human protein in male fertility.Free French abstractA French translation of this abstract is freely available at http://www.reproduction-online.org/content/149/4/367/suppl/DC1.
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Vickram A, Rajeswari VD, Pathy MR, Sridharan T. Analysis of Seminal Plasma Proteins of South Indian Jersey and Hybrid Bulls and their Correlation with Semen Quality. ACTA ACUST UNITED AC 2015. [DOI: 10.3923/ajas.2016.92.98] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Morrell J, Georgakas A, Lundeheim N, Nash D, Davies Morel M, Johannisson A. Effect of heterologous and homologous seminal plasma on stallion sperm quality. Theriogenology 2014; 82:176-83. [DOI: 10.1016/j.theriogenology.2014.03.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 03/17/2014] [Accepted: 03/21/2014] [Indexed: 01/08/2023]
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Plante G, Therien I, Lachance C, Leclerc P, Fan J, Manjunath P. Implication of the human Binder of SPerm Homolog 1 (BSPH1) protein in capacitation. Mol Hum Reprod 2014; 20:409-21. [DOI: 10.1093/molehr/gau006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Plante G, Fan J, Manjunath P. Murine Binder of SPerm Homolog 2 (BSPH2): The Black Sheep of the BSP Superfamily1. Biol Reprod 2014; 90:20. [DOI: 10.1095/biolreprod.113.114272] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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Ronquist GK, Ek B, Ronquist G, Morrell J, Carlsson L, Larsson A. Biochemical characterization of stallion prostasomes and comparison to their human counterparts. Syst Biol Reprod Med 2013; 59:297-303. [DOI: 10.3109/19396368.2013.822612] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Srivastava N, Jerome A, Srivastava S, Ghosh S, Kumar A. Bovine seminal PDC-109 protein: An overview of biochemical and functional properties. Anim Reprod Sci 2013; 138:1-13. [DOI: 10.1016/j.anireprosci.2013.02.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 11/21/2012] [Accepted: 02/09/2013] [Indexed: 12/23/2022]
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HSP-1/2, a major protein of equine seminal plasma, exhibits chaperone-like activity. Biochem Biophys Res Commun 2012; 427:18-23. [DOI: 10.1016/j.bbrc.2012.08.120] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 08/24/2012] [Indexed: 11/18/2022]
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Plante G, Thérien I, Manjunath P. Characterization of recombinant murine binder of sperm protein homolog 1 and its role in capacitation. Biol Reprod 2012; 87:20, 1-11. [PMID: 22539676 DOI: 10.1095/biolreprod.111.096644] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Sperm capacitation is a maturation step that is deemed to be essential for sperm to fertilize an oocyte. A family of proteins, the binder of sperm (BSP), are known to bind choline phospholipids on sperm membranes and promote capacitation in bulls and boars. Recently, BSP-homologous genes have been identified in the epididymal tissues of human (BSPH1) and mouse (Bsph1, Bsph2). The aim of this study was to determine the binding characteristics of the murine binder of sperm protein homolog 1 (BSPH1) and evaluate its effects on sperm capacitation. Since it is not possible to purify the native BSP proteins from human and mouse in sufficient quantity, a murine recombinant BSPH1 (rec-BSPH1) was produced and used for the functional studies. Similarly to BSP proteins from other species, rec-BSPH1 bound to gelatin, heparin, phosphatidylcholine liposomes, and sperm. Both native BSPH1 and rec-BSPH1 were detected on the head and the midpiece region of sperm, although a stronger signal was detected on the midpiece region when sperm were incubated in a capacitating media containing bovine serum albumin. More importantly, murine rec-BSPH1 was able to capacitate sperm, but was unable to induce the acrosome reaction. These results show that murine epididymal BSPH1 shares many biochemical and functional characteristics with BSP proteins secreted by seminal vesicles of ungulates, and suggest that it might play a similar role in sperm functions.
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Affiliation(s)
- Geneviève Plante
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada
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Restoration of seminal plasma to stallion spermatozoa selected by colloid centrifugation increases sperm progressive motility but is detrimental to chromatin integrity. Theriogenology 2012; 78:345-52. [DOI: 10.1016/j.theriogenology.2012.02.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Revised: 02/01/2012] [Accepted: 02/04/2012] [Indexed: 11/23/2022]
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Barrier-Battut I, Bonnet C, Giraudo A, Dubois C, Caillaud M, Vidament M. Removal of Seminal Plasma Enhances Membrane Stability on Fresh and Cooled Stallion Spermatozoa. Reprod Domest Anim 2012; 48:64-71. [DOI: 10.1111/j.1439-0531.2012.02026.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Srinivas MS, Sundaram V, Pathy MR, Sridharan TB. A Comparative Study of Distribution of Protein and Cholesterol in Various Fractions of Human Semen from Infertile and Fertile Subjects. ACTA ACUST UNITED AC 2012. [DOI: 10.5005/jp-journals-10016-1046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
ABSTRACT
Aim
To elucidate the concentration of the protein and cholesterol in different fractions of human semen from different infertile categories and comparing them with the fertile group.
Materials and methods
The human semen was collected from different infertile categories including oligoasthenospermia, asthenospermia, azoospermia, normospermia, oligospermia and fertile group. Immediately after collection, the semen analysis was done as per WHO standard protocols. After that, the semen was centrifuged to get the different fractions. Four main fractions were obtained, (1) spermatozoa, (2) debris or material that precipitates at 12 K rpm for 10 minutes, (3) prostasomes which was precipitated at 20K rpm for 120 minutes, (4) seminal plasma. The protein concentration was done by Lowry's method and cholesterol was estimated by diagnostic kit.
Results
Sodium dodecyl sulfate—polyacrylamide gel electrophoresis (SDS PAGE) was run for all the categories of semen samples for their seminal plasma and the fertility associated protein was identified. A significant difference was found in the concentration of proteins in all subfractions when compared between control and infertile categories. Almost 86% of the protein was recovered from soluble fraction. In case of azoospermia, the protein content was very low when compared with fertile group. Seminal plasma proteins were visualized by silver staining. The molecular weight of the protein bands were ranging from 6.5 to 205 kDa. The band with molecular weight around 55 kDa was found to be missing in case of oligoasthenospermia. This particular protein is said to be fertility associated protein. The content of cholesterol for different subfraction of the human semen samples from infertile and fertile samples was compared. A wide range of cholesterol was recovered from prostasomes, that too purified.
Conclusion
A thrive study have to be done in all the subfractions of the semen irrespective of the category of samples to know the exact function of the each subfractions in terms of protein and cholesterol distribution.
How to cite this article
Sundaram V, Srinivas MS, Rao KA, Pathy MR, Sridharan TB. A Comparative Study of Distribution of Protein and Cholesterol in Various Fractions of Human Semen from Infertile and Fertile Subjects. Int J Infertility Fetal Med 2012;3(3):78-82.
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Anbazhagan V, Sankhala RS, Singh BP, Swamy MJ. Isothermal titration calorimetric studies on the interaction of the major bovine seminal plasma protein, PDC-109 with phospholipid membranes. PLoS One 2011; 6:e25993. [PMID: 22022488 PMCID: PMC3193528 DOI: 10.1371/journal.pone.0025993] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Accepted: 09/15/2011] [Indexed: 11/19/2022] Open
Abstract
The interaction of the major bovine seminal plasma protein, PDC-109 with lipid membranes was investigated by isothermal titration calorimetry. Binding of the protein to model membranes made up of diacyl phospholipids was found to be endothermic, with positive values of binding enthalpy and entropy, and could be analyzed in terms of a single type of binding sites on the protein. Enthalpies and entropies for binding to diacylphosphatidylcholine membranes increased with increase in temperature, although a clear-cut linear dependence was not observed. The entropically driven binding process indicates that hydrophobic interactions play a major role in the overall binding process. Binding of PDC-109 with dimyristoylphosphatidylcholine membranes containing 25 mol% cholesterol showed an initial increase in the association constant as well as enthalpy and entropy of binding with increase in temperature, whereas the values decreased with further increase in temperature. The affinity of PDC-109 for phosphatidylcholine increased at higher pH, which is physiologically relevant in view of the basic nature of the seminal plasma. Binding of PDC-109 to Lyso-PC could be best analysed in terms of two types of binding interactions, a high affinity interaction with Lyso-PC micelles and a low-affinity interaction with the monomeric lipid. Enthalpy-entropy compensation was observed for the interaction of PDC-109 with phospholipid membranes, suggesting that water structure plays an important role in the binding process.
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Affiliation(s)
- V. Anbazhagan
- School of Chemistry, University of Hyderabad, Hyderabad, Andhra Pradesh, India
| | | | - Bhanu Pratap Singh
- School of Chemistry, University of Hyderabad, Hyderabad, Andhra Pradesh, India
| | - Musti J. Swamy
- School of Chemistry, University of Hyderabad, Hyderabad, Andhra Pradesh, India
- * E-mail:
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Jobim M, Trein C, Zirkler H, Gregory R, Sieme H, Mattos R. Two-dimensional polyacrylamide gel electrophoresis of equine seminal plasma proteins and their relation with semen freezability. Theriogenology 2011; 76:765-71. [DOI: 10.1016/j.theriogenology.2011.04.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 04/01/2011] [Accepted: 04/09/2011] [Indexed: 11/28/2022]
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Pillet E, Duchamp G, Batellier F, Beaumal V, Anton M, Desherces S, Schmitt E, Magistrini M. Egg yolk plasma can replace egg yolk in stallion freezing extenders. Theriogenology 2011; 75:105-14. [DOI: 10.1016/j.theriogenology.2010.07.015] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Revised: 06/25/2010] [Accepted: 07/21/2010] [Indexed: 10/19/2022]
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Identification of PDC-109-like protein(s) in buffalo seminal plasma. Anim Reprod Sci 2009; 115:306-11. [DOI: 10.1016/j.anireprosci.2008.11.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2008] [Revised: 10/26/2008] [Accepted: 11/13/2008] [Indexed: 11/23/2022]
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39
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Yue W, Shi L, Bai Z, Ren Y, Zhao Y. Sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis of ram seminal plasma proteins and their correlation with semen characteristics. Anim Reprod Sci 2009; 116:386-91. [PMID: 19321275 DOI: 10.1016/j.anireprosci.2009.02.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2008] [Revised: 11/17/2008] [Accepted: 02/17/2009] [Indexed: 11/29/2022]
Abstract
The present study was conducted to investigate fertility-associated proteins in ram seminal plasma and the correlation between specific protein and semen characteristics in sheep. Thirty-eight German merino sheep clinically proven healthy were chosen and divided into three groups according to fertility. Ejaculates were collected by an artificial vagina and semen characteristics (volume, pH value, motility, viability and concentration) were recorded. Seminal plasma was harvested by centrifugation and then subjected to SDS-polyacrylamide gel electrophoresis (SDS-PAGE) analysis in parallel with molecular weight standards. Fifteen protein bands with different molecular weights, ranging from 15.13 to 116.20kDa, were identified on the gel. The results showed that the relative content of eight protein bands was significantly different between the high-fertility group (H-group) and the low-fertility group (L-group). Although the remaining seven protein bands showed no fertility-associated changes in their relative content, some of them were negatively or positively correlated with some semen quality parameters (motility, viability, concentration or pH value). Thus, this study indicates that ram seminal plasma contains specific proteins that are associated with fertility and semen characteristics. Also, these proteins could be utilised in developing a reliable and simple method to determine the ram fertility or semen quality.
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Affiliation(s)
- Wenbin Yue
- College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, PR China.
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40
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Manjunath P, Lefebvre J, Jois PS, Fan J, Wright MW. New nomenclature for mammalian BSP genes. Biol Reprod 2008; 80:394-7. [PMID: 18923155 DOI: 10.1095/biolreprod.108.074088] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BSP proteins and their homologs are a family of structurally related proteins characterized by the presence of tandem fibronectin type II domains. In the bovine species, BSP proteins were shown to be involved in sperm capacitation, a posttesticular maturation event necessary for sperm to acquire the ability to fertilize an oocyte. Recently, many new genes from this family have been discovered in numerous mammalian species. However, inconsistency in the nomenclature is creating much confusion. In light of the rapid growth of the BSP superfamily of proteins, we propose a new nomenclature in collaboration with the HUGO Gene Nomenclature Committee.
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Affiliation(s)
- Puttaswamy Manjunath
- Research Centre, Maisonneuve-Rosemont Hospital, Department of Medicine, University of Montréal, Montréal, Québec, Canada.
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41
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Muiño-Blanco T, Pérez-Pé R, Cebrián-Pérez JA. Seminal Plasma Proteins and Sperm Resistance to Stress. Reprod Domest Anim 2008; 43 Suppl 4:18-31. [DOI: 10.1111/j.1439-0531.2008.01228.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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42
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Nixon B, Jones RC, Holland MK. Molecular and Functional Characterization of the Rabbit Epididymal Secretory Protein 52, REP521. Biol Reprod 2008; 78:910-20. [DOI: 10.1095/biolreprod.107.065524] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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43
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Domínguez M, Falcinelli A, Hozbor F, Sánchez E, Cesari A, Alberio R. Seasonal variations in the composition of ram seminal plasma and its effect on frozen-thawed ram sperm. Theriogenology 2008; 69:564-73. [DOI: 10.1016/j.theriogenology.2007.11.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2007] [Revised: 08/02/2007] [Accepted: 11/05/2007] [Indexed: 10/22/2022]
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44
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Tannert A, Töpfer-Petersen E, Herrmann A, Müller K, Müller P. The Lipid Composition Modulates the Influence of the Bovine Seminal Plasma Protein PDC-109 on Membrane Stability. Biochemistry 2007; 46:11621-9. [PMID: 17892307 DOI: 10.1021/bi7011299] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The bovine seminal plasma protein PDC-109 exerts an essential influence on the sperm cell plasma membrane during capacitation. However, by any mechanism, it has to be ensured that this function of the protein on sperm cells is not initiated too early, that is, upon ejaculation when PDC-109 and sperm cells come into first contact, but rather at later stages of sperm genesis in the female genital tract. To answer the question of whether changes of the bovine sperm lipid composition can modulate the effect of PDC-109 on sperm membranes, we have investigated the influence of PDC-109 on the integrity of (i) differently composed lipid vesicles and of (ii) membranes from human red blood cells and bovine spermatozoa. PDC-109 most effectively disturbed lipid membranes composed of choline-containing phospholipids and in the absence of cholesterol. The impact of the protein on lipid vesicles was attenuated in the presence of cholesterol or of noncholine-containing phospholipids, such as phosphatidylethanolamine or phosphatidylserine. An extraction of cholesterol from lipid or biological membranes using methyl-beta-cyclodextrin caused an increased membrane perturbation by PDC-109. Our results argue for a oppositional effect of PDC-109 during sperm cell genesis. We hypothesize that the lipid composition of ejaculated bull sperm cells allows a binding of PDC-109 without leading to an impairment of the plasma membrane. At later stages of sperm cell genesis upon release of cholesterol from sperm membranes, PDC-109 triggers a destabilization of the cells.
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Affiliation(s)
- Astrid Tannert
- Institute of Biology, Humboldt-University Berlin, Germany
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45
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Cardozo JA, Fernández-Juan M, Cebrián-Pérez JA, Muiño-Blanco T. Identification of RSVP14 and RSVP20 Components by Two-dimensional Electrophoresis and Western-blotting. Reprod Domest Anim 2007; 43:15-21. [DOI: 10.1111/j.1439-0531.2006.00845.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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46
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Ekhlasi-Hundrieser M, Schäfer B, Philipp U, Kuiper H, Leeb T, Mehta M, Kirchhoff C, Töpfer-Petersen E. Sperm-binding fibronectin type II-module proteins are genetically linked and functionally related. Gene 2007; 392:253-65. [PMID: 17307309 DOI: 10.1016/j.gene.2007.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Revised: 01/08/2007] [Accepted: 01/08/2007] [Indexed: 10/23/2022]
Abstract
Fibronectin type II (Fn2) module-containing proteins in the male genital tract are characterized by different numbers of Fn2 modules. Predominantly two classes exist which are distinct by having either two or four Fn2 modules. Minor variants with three Fn2 modules were also found in the human and the porcine epididymis. To reveal their relationship, mRNAs and proteins of representatives of these classes were studied in human, in Sus scrofa, and in rodents. Adult boars expressed members of both classes, i.e. ELSPBP1 and pB1, in subsequent regions of the epididymis, and both were under androgenic control. Human and rodent epididymides, on the other hand, alternatively contained only representatives of one of these two classes, i.e. ELSPBP1 in the human and two different pB1-related counterparts in rodents. ELSPBP1 and pB1-related genomic sequences were closely linked in chromosomal regions HSA 19q and SSC 6 q11-q21; conserved synteny between these regions is well established. On the other hand, in a syntenic region on mouse chromosome 7, ELSPBP1-related sequences were lacking. Tight binding to the sperm membrane via a choline-mediated mechanism was a common feature of the two classes of Fn2-module proteins, suggesting related function(s). However, differences in their regionalized expression patterns along the male genital tract as well as in association sites on the sperm surface suggested a species-specific sequential order in sperm binding.
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Affiliation(s)
- Mahnaz Ekhlasi-Hundrieser
- Department of Reproductive Biology, University of Veterinary Medicine Hannover, Bünteweg 2, 30559 Hannover, Germany.
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47
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Lusignan MF, Bergeron A, Crête MH, Lazure C, Manjunath P. Induction of Epididymal Boar Sperm Capacitation by pB1 and BSP-A1/-A2 Proteins, Members of the BSP Protein Family1. Biol Reprod 2007; 76:424-32. [PMID: 17123943 DOI: 10.1095/biolreprod.106.055624] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
A family of proteins designated BSP-A1, BSP-A2, BSP-A3, and BSP-30-kDa, collectively called BSP (bovine seminal plasma) proteins, constitute the major protein fraction of bull seminal plasma. BSP proteins can stimulate sperm capacitation by inducing cholesterol and phospholipid efflux from sperm. Boar seminal plasma contains one homologous protein of the BSP family, named pB1; however, its physiological role is still unknown. In the current study, we report a novel method to purify pB1 from boar seminal plasma by chondroitin sulfate B-affinity chromatography and reverse-phase-high performance liquid chromatography. We also studied the effect of pB1, BSP-A1/-A2, and whole boar seminal plasma on boar sperm capacitation. Boar epididymal sperm were washed, preincubated in noncapacitating medium containing pB1 (0, 2.5, 5, 10 or 20 microg/ml), BSP-A1/-A2 (0 or 20 microg/ml) proteins, or whole seminal plasma (0, 250, 500, or 1000 microg/ml), then washed and incubated in capacitating medium. Acrosomal integrity was assessed by chlortetracycline staining. The status of sperm capacitation was evaluated by the capacity of sperm to undergo the acrosome reaction initiated by the addition of the calcium ionophore, A23187. The pB1 and BSP-A1/-A2 proteins increased epididymal sperm capacitation as compared with control (sperm preincubated without proteins). This effect reached a maximum level at 10 microg/ml pB1 and at 20 microg/ml BSP-A1/-A2 (2.3- and 2.2-fold higher than control, respectively). Whole boar seminal plasma did not induce sperm capacitation. In addition, pB1 bound to boar epididymal sperm and was lost during capacitation. These results indicate that BSP proteins and their homologs in other species induce sperm capacitation in a similar way.
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Affiliation(s)
- Marie-France Lusignan
- Guy-Bernier Research Center, Maisonneuve-Rosemont Hospital and Department of Medecine, University of Montreal, Montreal, Quebec, Canada H1T 2M4
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48
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Manásková P, Peknicová J, Elzeinová F, Tichá M, Jonáková V. Origin, localization and binding abilities of boar DQH sperm surface protein tested by specific monoclonal antibodies. J Reprod Immunol 2007; 74:103-13. [PMID: 17270277 DOI: 10.1016/j.jri.2006.11.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Revised: 07/14/2006] [Accepted: 11/24/2006] [Indexed: 10/23/2022]
Abstract
Seminal plasma proteins bind the sperm surface at ejaculation and may modulate several aspects of sperm activity during reproduction. DQH sperm surface protein, present in boar seminal plasma, shows affinity to phoshorylcholine, acidic polysaccharides, oviductal epithelium and zona pellucida glycoproteins. Monoclonal antibodies (MAbs) against DQH protein were prepared and used for determination of the DQH protein origin in boar reproductive organs, its localization on boar spermatozoa, and for investigation of its binding abilities in the porcine oviduct and to the zona pellucida of the oocyte. The mRNA transcript of DQH protein was found in seminal vesicles and not in the testis, epididymis and prostate. Its translated products were immunodetected by MAbs in seminal vesicle extract and fluid, in seminal vesicle tissue sections and on the membrane-associated acrosomal part of ejaculated spermatozoa. These results confirm the ability of DQH protein to bind the sperm surface at ejaculation and to participate in formation of the sperm reservoir in the porcine oviduct. Moreover, monoclonal antibodies reduced binding of sperm to oocytes and proved the role of DQH protein in the sperm-zona pellucida primary binding.
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Affiliation(s)
- P Manásková
- Department of Biochemistry of Reproduction, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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49
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Lefebvre J, Fan J, Chevalier S, Sullivan R, Carmona E, Manjunath P. Genomic structure and tissue-specific expression of human and mouse genes encoding homologues of the major bovine seminal plasma proteins. Mol Hum Reprod 2006; 13:45-53. [PMID: 17085770 DOI: 10.1093/molehr/gal098] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Sperm capacitation is a maturation event that takes place in the female reproductive tract and is essential for fertilization. A family of phospholipid-binding proteins present in bovine seminal plasma (BSP proteins) binds the sperm membrane at ejaculation and promotes bovine sperm capacitation. Homologues of these proteins have also been isolated from boar, ram, goat, bison and stallion seminal fluid, suggesting that BSP proteins and their homologues are conserved among mammals. However, there have been no reports on BSP-homologous proteins in mice and humans to date. A search of the mouse and human genomes, using the nucleic acid sequences of BSP proteins, revealed the presence of three BSP-like sequences in the mouse genome, named mouse BSP Homologue 1 (mBSPH1), mBSPH2 and mBSPH3, and one sequence in the human genome (hBSPH1). Mouse epididymal expressed sequence tags corresponding to partial sequences of mBSPH1 and mBSPH2 were identified. The entire complementary DNA (cDNA) sequences of mBSPH1 and mBSPH2 from mouse epididymis and hBSPH1 from human epididymis were obtained by 5'-/3'-rapid amplification of cDNA ends (RACE) and encode predicted proteins containing two tandemly repeated fibronectin type II domains, which is the signature of the BSP family of proteins. Using RT-PCR, it was revealed that mBSPH1, mBSPH2 and hBSPH1 mRNA are expressed only in the epididymis. Expression of mBSPH3 was not detected in any tissue and probably represents a pseudogene. This work shows, for the first time, that BSP homologues are expressed in mouse and human and may be involved in sperm capacitation in these species.
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Affiliation(s)
- J Lefebvre
- Guy-Bernier Research Centre, Maisonneuve-Rosemont Hospital and Department of Medicine, University of Montreal, Montreal, Québec, Canada
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50
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Bergeron A, Manjunath P. New insights towards understanding the mechanisms of sperm protection by egg yolk and milk. Mol Reprod Dev 2006; 73:1338-44. [PMID: 16868925 DOI: 10.1002/mrd.20565] [Citation(s) in RCA: 175] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Mammalian sperm preservation in extenders containing egg yolk (EY) and/or milk has been used for over half a century. However, the mechanism by which EY or milk protects sperm during storage remains elusive. Studies conducted over the past two decades in our laboratory have revealed that a family of lipid-binding proteins (BSP proteins) present in bull seminal plasma is detrimental to sperm preservation since these proteins induce cholesterol and phospholipid removal from the sperm membrane. Interestingly, these detrimental factors of seminal plasma interact with the low-density lipoproteins (LDL) present in EY. This interaction minimizes lipid removal from the sperm membrane, which positively influences sperm storage in liquid or frozen states. Based on several lines of evidence, we suggest that the sequestration of BSP proteins by LDL (BSP proteins: lipoprotein interaction) is the major mechanism of sperm protection by EY. Skimmed milk, which is devoid of lipoproteins, also protects sperm during storage. Several studies indicate that the active components involved in sperm protection by milk are casein micelles. Thus, it appears that the mechanism by which milk protects sperm involves a BSP protein: casein micelle interaction. In view of these new insights, novel strategies have been suggested to improve the efficiency of semen preservation.
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Affiliation(s)
- Annick Bergeron
- Department of Medicine, University of Montreal and Guy-Bernier Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada
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