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Karabulut S, Camcı İY, Altun CE, Usta M, Yiğit P. Assessing the Impact of the Novel Sperm Selection Technique 'Annexin-V Coated Polystyrene Bead Technique' on Mouse Assisted Reproductive Techniques Outcomes: Preliminary Findings. Reprod Sci 2024:10.1007/s43032-024-01620-w. [PMID: 38874899 DOI: 10.1007/s43032-024-01620-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 06/03/2024] [Indexed: 06/15/2024]
Abstract
ICSI is one of the most commonly used techniques to treat infertility. The sperm selection for the procedure is done 'randomly' by the embryologist according to the motility and morphology parameters which is known not to reflect the potential of a sperm for fertilization, pregnancy and a healthy childbearing. Since the apoptosis rate is higher in sperm cells of infertile patients, it is more likely to choose an apoptotic sperm by the 'random selection method'. We recently introduced a novel sperm selection technique namely 'Annexin-V coated polystrene bead technique'(APB-Tech), for the selection of non-apoptotic sperm cells. The principal of the technique is based on the binding affinity of an apoptotic sperm to 'Annexin-V covered beads' enabling to distinguish a viable and a healthy sperm by light microscopy. The aim of the present study was to observe the effects of this technique on ICSI outcomes in mice. Sibling-oocyte trial was conducted and the outcome measures were compared with the results of traditional sperm selection method. Embryo and blastocyst qualities and blastocyst development rates were significantly increased in APB-Tech group, while the other parameters were not affected. Promising results obtained from the technique reflect its promising potential as a new and powerful tool for sperm selection and thus infertility techniques.
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Affiliation(s)
- Seda Karabulut
- Department of Histology and Embryology, Istanbul Medipol University, International School of Medicine, Beykoz, Istanbul, Türkiye.
- Health Science and Technologies Research Institute (SABİTA), Beykoz, Istanbul, Türkiye.
| | - İrem Yalım Camcı
- Department of Molecular Biology and Genetics, Gebze Technical University, Kocaeli, Türkiye
| | - Ceren Erdem Altun
- Department of Histology and Embryology, Istanbul Medipol University, International School of Medicine, Beykoz, Istanbul, Türkiye
- Health Science and Technologies Research Institute (SABİTA), Beykoz, Istanbul, Türkiye
| | - Melek Usta
- Department of Histology and Embryology, Istanbul Medipol University, International School of Medicine, Beykoz, Istanbul, Türkiye
- Health Science and Technologies Research Institute (SABİTA), Beykoz, Istanbul, Türkiye
| | - Pakize Yiğit
- Health Science and Technologies Research Institute (SABİTA), Beykoz, Istanbul, Türkiye
- Department of Biostatistics and Medical Informatics, Istanbul Medipol University, School of Medicine, Beykoz, Istanbul, Türkiye
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Bibi R, Jahan S, Razak S, Hammadeh ME, Almajwal A, Amor H. Protamines and DNA integrity as a biomarkers of sperm quality and assisted conception outcome. Andrologia 2022; 54:e14418. [PMID: 35267207 DOI: 10.1111/and.14418] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 02/16/2022] [Accepted: 03/01/2022] [Indexed: 12/22/2022] Open
Abstract
Present research aim was to identify functional tests in semen associated with DNA damage and chromatin maturity (protamination) which predict the outcome in assisted reproduction. Couples were grouped according to male partner semen parameters, into normozoospermia (NZs), severe male factor (SMF) and mild male factor (MMF). DNA fragmentation index (DFI) in spermatozoa was analysed by sperms chromatin dispersion (SCD), sperm chromatin structure assay (SCSA) and acridine orange testing (AOT). Chromomycin A3 (CMA3) and toluidine blue (TB) staining to measure sperm chromatin maturity (CM). DFI and chromatin decondensation were significantly lower in N compared to male factor categories (MMF and SMF). Aneuploidy embryos were significantly higher in couples with male factor infertility (MMF and SMF). A positive correlation was observed between fertilization rate (FR) and live birth rate (LBR) with sperm concentration, motility, vitality, normal sperm morphology and negative correlation between sperm DFI and sperm CM. No correlation was observed between embryo aneuploidy and sperm DFI or CM. Lower percentage of spermatozoa chromatin integrity are associated with low fertilization and live birth rate. Male factor infertility, due to impaired semen parameters and chromatin defects could be regarded in future as an indication of IVF/ICSI, and predictor of assisted reproductive techniques outcome.
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Affiliation(s)
- Riffat Bibi
- Department of Animal Sciences, Faculty of Biological Sciences, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
| | - Sarwat Jahan
- Department of Animal Sciences, Faculty of Biological Sciences, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
| | - Suhail Razak
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Mohammad Eid Hammadeh
- Department of Obstetrics, Gynecology and Reproductive Medicine, Saarland University Clinic, Homburg, Germany
| | - Ali Almajwal
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Houda Amor
- Department of Obstetrics, Gynecology and Reproductive Medicine, Saarland University Clinic, Homburg, Germany
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Abstract
Sperm selection in the female reproductive tract (FRT) is sophisticated. Only about 1,000 sperm out of millions in an ejaculate reach the fallopian tube and thus have a chance of fertilizing an oocyte. In assisted reproduction techniques, sperm are usually selected using their density or motility, characteristics that do not reflect their fertilization competence and, therefore, might result in failure to fertilize the oocyte. Although sperm processing in in vitro fertilization (IVF) and intrauterine insemination (IUI) bypasses many of the selection processes in the FRT, selection by the cumulus mass and the zona pellucida remain intact. By contrast, the direct injection of a sperm into an oocyte in intracytoplasmic sperm injection (ICSI) bypasses all natural selection barriers and, therefore, increases the risk of transferring paternal defects such as fragmented DNA and genomic abnormalities in sperm to the resulting child. Research into surrogate markers of fertilization potential and into simulating the natural sperm selection processes has progressed. However, methods of sperm isolation - such as hyaluronic acid-based selection and microfluidic isolation based on sperm tactic responses - use only one or two parameters and are not comparable with the multistep sperm selection processes naturally occurring within the FRT. Fertilization-competent sperm require a panel of molecules, including zona pellucida-binding proteins and ion channel proteins, that enable them to progress through the FRT to achieve fertilization. The optimal artificial sperm selection method will, therefore, probably need to use a multiparameter tool that incorporates the molecular signature of sperm with high fertilization potential, and their responses to external cues, within a microfluidic system that can replicate the physiological processes of the FRT in vitro.
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Viscous Cervical Environment-on-a-Chip for Selecting High-Quality Sperm from Human Semen. Biomedicines 2021; 9:biomedicines9101439. [PMID: 34680555 PMCID: PMC8533482 DOI: 10.3390/biomedicines9101439] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/13/2021] [Accepted: 09/28/2021] [Indexed: 11/17/2022] Open
Abstract
When ejaculated sperm travels through the vagina to the uterus, mucus secreted by the cervical canal generally filters out sperm having low motility and poor morphology. To investigate this selection principle in vivo, we developed a microfluidic sperm-sorting chip with a viscous medium (polyvinylpyrrolidone: PVP) to imitate the biophysical environment mimic system of the human cervical canal. The material property of the PVP solution was tuned to the range of viscosities of cervical mucus using micro-viscometry. The selection of high-quality human sperm was experimentally evaluated in vitro and theoretically analyzed by the convection-diffusion mechanism. The convection flow is shown to be dominant at low viscosity of the medium used in the sperm-sorting chip when seeded with raw semen; hence, the raw semen containing sperm and debris convectively flow together with suppressed relative dispersions. Also, it was observed that the sperm selected via the chip not only had high motilities but also normal morphologies and high DNA integrity. Therefore, the biomimetic sperm-sorting chip with PVP medium is expected to improve male fertility by enabling the selection of high-quality sperm as well as uncovering pathways and regulatory mechanisms involved in sperm transport through the female reproductive tract for egg fertilization.
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Mangoli E, Khalili MA. The Beneficial Role of Intra Cytoplasmic Morphologically Selected Sperm Injection (IMSI) in Assisted Reproduction. J Reprod Infertil 2020; 21:3-10. [PMID: 32175260 PMCID: PMC7048693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Since the introduction of intracytoplasmic sperm injection (ICSI), the importance of sperm morphology assessment has been given attention in the assisted reproduction field. It is important to select a good-quality motile spermatozoon for giving a better embryo quality in assisted reproduction technique (ART). In ICSI, sperm morphology evaluation is limited due to its low magnification. However, by using intracytoplasmic morphologically selected sperm injection (IMSI), the selection is done at high magnification of ×6600 using motile sperm organelle morphology examination (MSOME). Therefore, it becomes possible to select a good quality spermatozoon with an intact nucleus that may enhance the pregnancy outcomes. Although all patients can benefit from IMSI, it is important to standardize which techniques (IMSI or ICSI) could be used or which group of patients benefit from IMSI to maximize the efficiency of this advanced technology.
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Affiliation(s)
| | - Mohammad Ali Khalili
- Corresponding Author: Mohammad Ali Khalili, Research and Clinical Center for Infertility, Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran, E-mail:
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Armstrong S, Atkinson M, MacKenzie J, Pacey A, Farquhar C. Add-ons in the laboratory: hopeful, but not always helpful. Fertil Steril 2019; 112:994-999. [DOI: 10.1016/j.fertnstert.2019.10.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 10/25/2019] [Indexed: 12/19/2022]
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Navarrete FA, Aguila L, Martin-Hidalgo D, Tourzani DA, Luque GM, Ardestani G, Garcia-Vazquez FA, Levin LR, Buck J, Darszon A, Buffone MG, Mager J, Fissore RA, Salicioni AM, Gervasi MG, Visconti PE. Transient Sperm Starvation Improves the Outcome of Assisted Reproductive Technologies. Front Cell Dev Biol 2019; 7:262. [PMID: 31750304 PMCID: PMC6848031 DOI: 10.3389/fcell.2019.00262] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 10/17/2019] [Indexed: 12/27/2022] Open
Abstract
To become fertile, mammalian sperm must undergo a series of biochemical and physiological changes known as capacitation. These changes involve crosstalk between metabolic and signaling pathways and can be recapitulated in vitro. In this work, sperm were incubated in the absence of exogenous nutrients (starved) until they were no longer able to move. Once immotile, energy substrates were added back to the media and sperm motility was rescued. Following rescue, a significantly higher percentage of starved sperm attained hyperactivated motility and displayed increased ability to fertilize in vitro when compared with sperm persistently incubated in standard capacitation media. Remarkably, the effects of this treatment continue beyond fertilization as starved and rescued sperm promoted higher rates of embryo development, and once transferred to pseudo-pregnant females, blastocysts derived from treated sperm produced significantly more pups. In addition, the starvation and rescue protocol increased fertilization and embryo development rates in sperm from a severely sub-fertile mouse model, and when combined with temporal increase in Ca2+ ion levels, this methodology significantly improved fertilization and embryo development rates in sperm of sterile CatSper1 KO mice model. Intracytoplasmic sperm injection (ICSI) does not work in the agriculturally relevant bovine system. Here, we show that transient nutrient starvation of bovine sperm significantly enhanced ICSI success in this species. These data reveal that the conditions under which sperm are treated impact post-fertilization development and suggest that this “starvation and rescue method” can be used to improve assisted reproductive technologies (ARTs) in other mammalian species, including humans.
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Affiliation(s)
- Felipe A Navarrete
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
| | - Luis Aguila
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
| | - David Martin-Hidalgo
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States.,Research Group of Intracellular Signaling and Technology of Reproduction, Institute of Biotechnology in Agriculture and Livestock (INBIO G + C), University of Extremadura, Cáceres, Spain
| | - Darya A Tourzani
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
| | - Guillermina M Luque
- Instituto de Biología y Medicina Experimental, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Goli Ardestani
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
| | - Francisco A Garcia-Vazquez
- Department of Physiology, Veterinary School, International Excellence Campus for Higher Education and Research, University of Murcia, Murcia, Spain.,Institute for Biomedical Research of Murcia, IMIB-Arrixaca, Murcia, Spain
| | - Lonny R Levin
- Department of Pharmacology, Weill Cornell Medical College, Cornell University, New York, NY, United States
| | - Jochen Buck
- Department of Pharmacology, Weill Cornell Medical College, Cornell University, New York, NY, United States
| | - Alberto Darszon
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Mariano G Buffone
- Instituto de Biología y Medicina Experimental, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Jesse Mager
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
| | - Rafael A Fissore
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
| | - Ana M Salicioni
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
| | - María G Gervasi
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
| | - Pablo E Visconti
- Department of Veterinary and Animal Sciences, Integrated Sciences Building, University of Massachusetts Amherst, Amherst, MA, United States
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Duran-Retamal M, Morris G, Achilli C, Gaunt M, Theodorou E, Saab W, Serhal P, Seshadri S. Live birth and miscarriage rate following intracytoplasmic morphologically selected sperm injection vs intracytoplasmic sperm injection: An updated systematic review and meta-analysis. Acta Obstet Gynecol Scand 2019; 99:24-33. [PMID: 31403712 DOI: 10.1111/aogs.13703] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 07/11/2019] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Intracytoplasmic morphologically selected sperm injection (IMSI) is one of the sperm selection techniques used for assisted reproduction which has been applied for a variety of indications including previously failed fertilization with intracytoplasmic sperm injection (ICSI). A Cochrane review1 found no difference in outcomes between either modality of sperm selection. Since the Cochrane review was published there have been a further two randomized controlled trials comparing IMSI and ICSI. This systematic review and meta-analysis aims to compare IMSI with ICSI as insemination methods regarding live birth rate and miscarriage rate. MATERIAL AND METHODS Systematic review of randomized controlled trials, observational studies and similar reviews in electronic databases published before January 2018. RESULTS We found nine randomized controlled trials, evaluating 1610 cycles of in vitro fertilization and 15 observational studies evaluating 1243 cycles of in vitro fertilization. Meta-analysis of the included randomized controlled trials showed no difference in the live birth rate or miscarriage rate between the ICSI and IMSI groups. Meta-analysis of five observational studies showed a significantly higher number of live births in the IMSI group than ICSI group (live birth rate odds ratio 1.47, 95% confidence interval 1.16-4.07), with a moderate degree of heterogeneity (I2 = 41%). Additionally, from six observational studies, a significantly lower miscarriage rate was observed in the IMSI group than in the ICSI group (odds ratio 0.51, 95% confidence interval 0.37-0.70, I2 = 0%). CONCLUSIONS Meta-analysis of randomized studies comparing IMSI to ICSI has not shown any difference in live birth rate and miscarriage rate. Meta-analysis of observational studies, which must be interpreted with caution, revealed an increased live birth rate and decreased miscarriage rate with IMSI vs ICSI.
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Affiliation(s)
| | - Guy Morris
- Center for Reproductive and Genetic Health, London, UK
| | | | - Matthew Gaunt
- Center for Reproductive and Genetic Health, London, UK
| | | | - Wael Saab
- Center for Reproductive and Genetic Health, London, UK
| | - Paul Serhal
- Center for Reproductive and Genetic Health, London, UK
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Mangoli E, Khalili MA, Talebi AR, Agha‐Rahimi A, Soleimani M, Faramarzi A, Pourentezari M. IMSI procedure improves clinical outcomes and embryo morphokinetics in patients with different aetiologies of male infertility. Andrologia 2019; 51:e13340. [DOI: 10.1111/and.13340] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 04/29/2019] [Accepted: 05/06/2019] [Indexed: 12/18/2022] Open
Affiliation(s)
- Esmat Mangoli
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - Mohammad Ali Khalili
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - Ali Reza Talebi
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - Azam Agha‐Rahimi
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - Mehrdad Soleimani
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - Azita Faramarzi
- Fertility and Infertility Research Center Health Technology Institute, Kermanshah University of Medical Sciences Kermanshah Iran
| | - Majid Pourentezari
- Departments of Biology and Anatomical Sciences Shahid Sadoughi University of Medical Sciences Yazd Iran
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Dai C, Zhang Z, Huang J, Wang X, Ru C, Pu H, Xie S, Zhang J, Moskovtsev S, Librach C, Jarvi K, Sun Y. Automated Non-Invasive Measurement of Single Sperm's Motility and Morphology. IEEE TRANSACTIONS ON MEDICAL IMAGING 2018; 37:2257-2265. [PMID: 29993571 DOI: 10.1109/tmi.2018.2840827] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Measuring cell motility and morphology is important for revealing their functional characteristics. This paper presents automation techniques that enable automated, non-invasive measurement of motility and morphology parameters of single sperm. Compared to the status quo of qualitative estimation of single sperm's motility and morphology manually, the automation techniques provide quantitative data for embryologists to select a single sperm for intracytoplasmic sperm injection. An adapted joint probabilistic data association filter was used for multi-sperm tracking and tackled challenges of identifying sperms that intersect or have small spatial distances. Since the standard differential interference contrast (DIC) imaging method has side illumination effect which causes inherent inhomogeneous image intensity and poses difficulties for accurate sperm morphology measurement, we integrated total variation norm into the quadratic cost function method, which together effectively removed inhomogeneous image intensity and retained sperm's subcellular structures after DIC image reconstruction. In order to relocate the same sperm of interest identified under low magnification after switching to high magnification, coordinate transformation was conducted to handle the changes in the field of view caused by magnification switch. The sperm's position after magnification switch was accurately predicted by accounting for the sperm's swimming motion during magnification switch. Experimental results demonstrated an accuracy of 95.6% in sperm motility measurement and an error <10% in morphology measurement.
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Mangoli E, Khalili MA, Talebi AR, Ghasemi‐Esmailabad S, Hosseini A. Is there any correlation between sperm parameters and chromatin quality with embryo morphokinetics in patients with male infertility? Andrologia 2018. [DOI: 10.1111/and.12997] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- E. Mangoli
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - M. A. Khalili
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - A. R. Talebi
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - S. Ghasemi‐Esmailabad
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
| | - A. Hosseini
- Department of Reproductive Biology, Research and Clinical Center for Infertility Shahid Sadoughi University of Medical Sciences Yazd Iran
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Pérez-Cerezales S, Laguna-Barraza R, de Castro AC, Sánchez-Calabuig MJ, Cano-Oliva E, de Castro-Pita FJ, Montoro-Buils L, Pericuesta E, Fernández-González R, Gutiérrez-Adán A. Sperm selection by thermotaxis improves ICSI outcome in mice. Sci Rep 2018; 8:2902. [PMID: 29440764 PMCID: PMC5811574 DOI: 10.1038/s41598-018-21335-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 01/29/2018] [Indexed: 12/11/2022] Open
Abstract
The ejaculate is a heterogeneous pool of spermatozoa containing only a small physiologically adequate subpopulation for fertilization. As there is no method to isolate this subpopulation, its specific characteristics are unknown. This is one of the main reasons why we lack effective tools to identify male infertility and for the low efficiency of assisted reproductive technologies. The aim of this study was to improve ICSI outcome by sperm selection through thermotaxis. Here we show that a specific subpopulation of mouse and human spermatozoa can be selected in vitro by thermotaxis and that this subpopulation is the one that enters the fallopian tube in mice. Further, we confirm that these selected spermatozoa in mice and humans show a much higher DNA integrity and lower chromatin compaction than unselected sperm, and in mice, they give rise to more and better embryos through intracytoplasmic sperm injection, doubling the number of successful pregnancies. Collectively, our results indicate that a high quality sperm subpopulation is selected in vitro by thermotaxis and that this subpopulation is also selected in vivo within the fallopian tube possibly by thermotaxis.
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Affiliation(s)
| | | | | | | | - Esther Cano-Oliva
- Unit of Reproduction, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
| | | | - Luis Montoro-Buils
- Unit of Reproduction, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Spain
| | - Eva Pericuesta
- Department of Animal Reproduction, INIA, Avda. Puerta de Hierro, Madrid, Spain
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Poor-responder patients do not benefit from intracytoplasmic morphologically selected sperm injection. J Assist Reprod Genet 2015; 32:445-50. [PMID: 25595539 DOI: 10.1007/s10815-014-0422-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 12/26/2014] [Indexed: 10/24/2022] Open
Abstract
PURPOSE To compare the outcomes of ICSI and IMSI in women presenting with poor ovarian response. METHODS Data of IMSI cycles performed from January 2011 to December 2013 were included in this retrospective cohort study. Patients were divided into two groups: normoresponder patients (NR group; patients with > 4 oocytes retrieved) and poor-responder patients (PR group; patients with ≤ 4 oocytes retrieved). Patients who underwent IMSI were matched with patients who underwent ICSI in the same period. The ICSI and IMSI outcomes were compared in the NR and PR groups. RESULTS A total of 414 matched cycles were included in this study. The NR group comprised 324 cycles (164 ICSI and 160 IMSI cycles), and the PR group comprised 90 cycles (43 ICSI and 47 IMSI cycles). In the NR group, no significant differences were observed between the ICSI- and IMSI-treated couples regarding cycle outcomes. In the PR group, fertilisation rate was significantly lower in IMSI-treated couples (53.9% ± 36.7% vs. 79.8% ± 29.3%). The proportion of cycles with embryo transfer (57.4 vs. 79.1%) and the number of transferred embryos (1.5 ± 0.8 vs. 1.9 ± 0.7) were significantly lower in IMSI compared with ICSI. Implantation, pregnancy and miscarriage rates were similar when ICSI or IMSI were performed. CONCLUSIONS Our results suggest that unselected couples undergoing ICSI that present with poor ovarian response to controlled ovarian stimulation do not benefit from sperm selection under high magnification prior to ICSI.
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