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Shapouri F, Mahendran T, Govindarajan M, Xie P, Kocur O, Palermo GD, Bakos HW, Ahlström A, Caisander G, Xu B, Bai S, Lambourne S, Aitken RJ. A comparison between the Felix™ electrophoretic system of sperm isolation and conventional density gradient centrifugation: a multicentre analysis. J Assist Reprod Genet 2023; 40:83-95. [PMID: 36515800 PMCID: PMC9840737 DOI: 10.1007/s10815-022-02680-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 12/03/2022] [Indexed: 12/15/2022] Open
Abstract
PURPOSE Developing optimized techniques for the isolation of human spermatozoa possessing low levels of DNA damage is an important objective for the ART industry. The purpose of this study was to compare a novel electrophoretic system (Felix™) of sperm isolation with a conventional method involving density gradient centrifugation (DGC). METHODS Five international ART Centres in Australia, India, Sweden, the USA, and China have collaborated in order to compare the quality of the sperm populations isolated by Felix™ and DGC in terms of processing time, sperm concentration, motility, vitality, and DNA integrity as assessed by 3 methods: SCSA, Halo, and TUNEL. RESULTS Across all centers, 112 comparisons were performed. Although significant differences were noted between centers in terms of the quality of the semen samples subjected for analysis, overall, both methods were equally capable of isolating populations of spermatozoa exhibiting high levels of vitality and progressive motility. The absolute numbers of spermatozoa recovered were significantly (p < 0.001) lower with the Felix™ device although sperm quality was higher with 4/5 centers reporting a significant improvement in DNA integrity relative to DGC (p < 0.01-p < 0.001). In practical terms, the Felix™ device featured a standardized 6 min preparation time whereas clinical DGC protocols varied from center to center but generally took around 40 min to complete. CONCLUSIONS The Felix™ device is a positive technical development capable of isolating suspensions of highly motile spermatozoa exhibiting low levels of DNA damage in a fraction of the time taken by conventional procedures such as DGC.
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Affiliation(s)
- Farnaz Shapouri
- Memphasys Ltd, 30 Richmond Road, Homebush West, NSW 2140 Australia
| | | | | | - Philip Xie
- grid.5386.8000000041936877XThe Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medicine, New York, NY USA
| | - Olena Kocur
- grid.5386.8000000041936877XThe Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medicine, New York, NY USA
| | - Gianpiero D. Palermo
- grid.5386.8000000041936877XThe Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medicine, New York, NY USA
| | - Hassan W. Bakos
- Monash IVF Group Limited, Level 2, 1 Fennell Street, Parramatta, NSW 2151 Australia
| | | | | | - Bo Xu
- grid.59053.3a0000000121679639Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001 People’s Republic of China
| | - Shun Bai
- grid.59053.3a0000000121679639Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001 People’s Republic of China
| | - Sarah Lambourne
- Memphasys Ltd, 30 Richmond Road, Homebush West, NSW 2140 Australia ,grid.266842.c0000 0000 8831 109XPriority Research Centre for Reproductive Science, Discipline of Biological Sciences, School of Environmental and Life Sciences, College of Engineering Science and Environment, University of Newcastle, Callaghan, NSW 2308 Australia
| | - R. John Aitken
- Memphasys Ltd, 30 Richmond Road, Homebush West, NSW 2140 Australia ,grid.266842.c0000 0000 8831 109XPriority Research Centre for Reproductive Science, Discipline of Biological Sciences, School of Environmental and Life Sciences, College of Engineering Science and Environment, University of Newcastle, Callaghan, NSW 2308 Australia ,grid.413648.cHunter Medical Research Institute, New Lambton Heights, NSW 2305 Australia
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Silva Balbin Villaverde AI, Ogle RA, Lewis P, Carbone V, Velkov T, Netherton JK, Baker MA. Sialylation of Asparagine 612 Inhibits Aconitase Activity during Mouse Sperm Capacitation; a Possible Mechanism for the Switch from Oxidative Phosphorylation to Glycolysis. Mol Cell Proteomics 2020; 19:1860-1875. [PMID: 32839225 DOI: 10.1074/mcp.ra120.002109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 07/22/2020] [Indexed: 11/06/2022] Open
Abstract
After ejaculation, mammalian spermatozoa must undergo a process known as capacitation in order to successfully fertilize the oocyte. Several post-translational modifications occur during capacitation, including sialylation, which despite being limited to a few proteins, seems to be essential for proper sperm-oocyte interaction. Regardless of its importance, to date, no single study has ever identified nor quantified which glycoproteins bearing terminal sialic acid (Sia) are altered during capacitation. Here we characterize sialylation during mouse sperm capacitation. Using tandem MS coupled with liquid chromatography (LC-MS/MS), we found 142 nonreductant peptides, with 9 of them showing potential modifications on their sialylated oligosaccharides during capacitation. As such, N-linked sialoglycopeptides from C4b-binding protein, endothelial lipase (EL), serine proteases 39 and 52, testis-expressed protein 101 and zonadhesin were reduced following capacitation. In contrast, mitochondrial aconitate hydratase (aconitase; ACO2), a TCA cycle enzyme, was the only protein to show an increase in Sia content during capacitation. Interestingly, although the loss of Sia within EL (N62) was accompanied by a reduction in its phospholipase A1 activity, a decrease in the activity of ACO2 (i.e. stereospecific isomerization of citrate to isocitrate) occurred when sialylation increased (N612). The latter was confirmed by N612D recombinant protein tagged with both His and GFP. The replacement of Sia for the negatively charged Aspartic acid in the N612D mutant caused complete loss of aconitase activity compared with the WT. Computer modeling show that N612 sits atop the catalytic site of ACO2. The introduction of Sia causes a large conformational change in the alpha helix, essentially, distorting the active site, leading to complete loss of function. These findings suggest that the switch from oxidative phosphorylation, over to glycolysis that occurs during capacitation may come about through sialylation of ACO2.
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Affiliation(s)
- Ana Izabel Silva Balbin Villaverde
- Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, Australia
| | - Rachel A Ogle
- Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, Australia
| | - Peter Lewis
- Centre for Chemical Biology and Clinical Pharmacology, Department of Biology, School of Environmental & Life Sciences, The University of Newcastle, Callaghan, Australia
| | - Vincenzo Carbone
- AgResearchGrasslands Research Centre, Palmerston North, New Zealand
| | - Tony Velkov
- Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, NSW, Australia
| | - Jacob K Netherton
- Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, Australia
| | - Mark A Baker
- Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, Australia.
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Kheirollahi-Kouhestani M, Razavi S, Tavalaee M, Deemeh M, Mardani M, Moshtaghian J, Nasr-Esfahani M. Selection of sperm based on combined density gradient and Zeta method may improve ICSI outcome. Hum Reprod 2009; 24:2409-16. [DOI: 10.1093/humrep/dep088] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tollner TL, Yudin AI, Treece CA, Overstreet JW, Cherr GN. Macaque sperm coating protein DEFB126 facilitates sperm penetration of cervical mucus. Hum Reprod 2008; 23:2523-34. [PMID: 18658160 DOI: 10.1093/humrep/den276] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Sperm coating protein beta-defensin 126 (DEFB126) is adsorbed onto the entire surface of macaque sperm in the caudal epididymis and is retained on viable sperm collected from the cervix and the uterine lumen of mated female macaques. We investigated the role of sperm coating protein DEFB126 in cervical mucus penetration (CMP). METHODS Cervical mucus (CM) was collected from peri-ovulatory female macaques and loaded into CMP chambers. Sperm were introduced to CMP chambers following treatment with either polyclonal antibodies raised to DEFB126 or seminal plasma proteins (SPPs), 1 mM caffeine+1 mM dibutyryl cyclic adenosine monophosphate (dbcAMP) (induces release of DEFB126 from sperm surface), neuraminidase (NMase) or poly-L-lysine (PLP). Following removal of DEFB126 or SPPs from the sperm surface, sperm were treated with concentrated DEFB126 or concentrated SPPs prior to being introduced to CMP chambers. The numbers of sperm that penetrated and traversed CM were scored over 6 min. RESULTS Treatment of sperm with anti-DEFB126 antibodies, 1 mM caffeine+1 mM dbcAMP, NMase, and PLP resulted in similar and significant levels of inhibition of sperm CMP, whereas addition of anti-SPPs antibodies had no effect. In experiments where DEFB126 and SPPs were removed, CMP capability of sperm was restored by addition of DEFB126 back to the sperm surface, whereas treatment of sperm with concentrated SPPs slightly inhibited sperm penetration. CONCLUSIONS DEFB126 and its high negative charge appears to be critical for the movement of sperm through CM in the macaque, while SPPs adhered to the sperm surface offer no advantage in CMP.
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Affiliation(s)
- Theodore L Tollner
- Center for Health and the Environment, Bodega Marine Laboratory, University of California, Davis 94923, USA
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Chan PJ, Jacobson JD, Corselli JU, Patton WC. A simple zeta method for sperm selection based on membrane charge. Fertil Steril 2006; 85:481-6. [PMID: 16595231 DOI: 10.1016/j.fertnstert.2005.07.1302] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2005] [Revised: 07/19/2005] [Accepted: 07/19/2005] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The objectives were: [1] to develop a simple zeta potential method for sperm isolation; and [2] to analyze the sperm maturity, morphology, kinematic, and DNA parameters. DESIGN The phenomenon of sticky sperm adhering to slide surfaces was adapted for collecting charged sperm. SETTING Clinical and academic research environment. PATIENT(S) Discarded colloid-washed sperm from routine laboratory testing (n = 8). INTERVENTION(S) Sperm were centrifuged in serum-free medium and collected for analyses. MAIN OUTCOME MEASURE(S) Kinematic parameters, DNA integrity, and maturity. RESULT(S) The percentages of mature (73.0% +/- 0.5% vs. control 63.5% +/- 0.5% SEM) and DNA intact sperm (85.0% +/- 0.3% vs. 69.5% +/- 0.5%) increased in the male factor subgroup. Strict normal morphology (19.3% +/- 0.1% vs. 10.0% +/- 0.1%), hyperactivation (7.0% +/- 0.1% vs. 3.6% +/- 0.1%), and progressive motility (29.1% +/- 0.1% vs. 19.9% +/- 0.1%) increased by twofold. CONCLUSION(S) The zeta method improved sperm parameters associated with increased fertilization and pregnancy after assisted reproduction procedures. Manipulation from the attaching-detaching process stimulated sperm metabolism without causing premature acrosome reactions. Total motility was unchanged suggesting a lack of association between total motility and zeta potential.
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Affiliation(s)
- Philip J Chan
- Department of Gynecology and Obstetrics, Center for Fertility and In Vitro Fertilization, Loma Linda University School of Medicine, Loma Linda, California, USA.
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