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Gille AS, Givelet M, Pehlic D, Lapoujade C, Lassalle B, Barroca V, Bemelmans AP, Borderie D, Moison D, Livera G, Gauthier LR, Boussin FD, Thiounn N, Allemand I, Peyssonnaux C, Wolf JP, Barraud-Lange V, Riou L, Fouchet P. Impact of the hypoxic microenvironment on spermatogonial stem cells in culture. Front Cell Dev Biol 2024; 11:1293068. [PMID: 38304612 PMCID: PMC10830753 DOI: 10.3389/fcell.2023.1293068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 11/21/2023] [Indexed: 02/03/2024] Open
Abstract
The stem cell niche plays a crucial role in the decision to either self-renew or differentiate. Recent observations lead to the hypothesis that O2 supply by blood and local O2 tension could be key components of the testicular niche of spermatogonial stem cells (SSCs). In this study, we investigated the impact of different hypoxic conditions (3.5%, 1%, and 0.1% O2 tension) on murine and human SSCs in culture. We observed a deleterious effect of severe hypoxia (1% O2 and 0.1% O2) on the capacity of murine SSCs to form germ cell clusters when plated at low density. Severe effects on SSCs proliferation occur at an O2 tension ≤1% and hypoxia was shown to induce a slight differentiation bias under 1% and 0.1% O2 conditions. Exposure to hypoxia did not appear to change the mitochondrial mass and the potential of membrane of mitochondria in SSCs, but induced the generation of mitochondrial ROS at 3.5% and 1% O2. In 3.5% O2 conditions, the capacity of SSCs to form colonies was maintained at the level of 21% O2 at low cell density, but it was impossible to amplify and maintain stem cell number in high cell density culture. In addition, we observed that 3.5% hypoxia did not improve the maintenance and propagation of human SSCs. Finally, our data tend to show that the transcription factors HIF-1α and HIF-2α are not involved in the SSCs cell autonomous response to hypoxia.
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Affiliation(s)
- A. S. Gille
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Département de Génétique, Développement et Cancer. Team from Gametes to Birth, Institut Cochin, INSERM U1016, Paris, France
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | - M. Givelet
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Département de Génétique, Développement et Cancer. Team from Gametes to Birth, Institut Cochin, INSERM U1016, Paris, France
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | - D. Pehlic
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - C. Lapoujade
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - B. Lassalle
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - V. Barroca
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - A. P. Bemelmans
- CEA, IBFJ, Molecular Imaging Research Center (MIRCen), CNRS, Université Paris-Saclay, Fontenay-aux-Roses, France
| | - D. Borderie
- Université Paris Cité, Inserm, T3S, Paris, France
- Department of Biochemistry AP-HP, Cochin Hospital, Paris, France
| | - D. Moison
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - G. Livera
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - L. R. Gauthier
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - F. D. Boussin
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - N. Thiounn
- Université de Paris Cité, Service d’Urologie, Centre Hospitalier Georges Pompidou, Assistance Publique - Hôpitaux de Paris Centre, Paris, France
| | - I. Allemand
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - C. Peyssonnaux
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
- Laboratory of Excellence GR-Ex, Paris, France
| | - J. P. Wolf
- Département de Génétique, Développement et Cancer. Team from Gametes to Birth, Institut Cochin, INSERM U1016, Paris, France
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | - V. Barraud-Lange
- Département de Génétique, Développement et Cancer. Team from Gametes to Birth, Institut Cochin, INSERM U1016, Paris, France
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | - L. Riou
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
| | - P. Fouchet
- Université Paris Cité, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
- Université Paris-Saclay, INSERM, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, France
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Vatel M, Torre A, Paillusson B, Scheffler F, Bergere M, Benkhalifa M, Le Martelot MT, Leperlier F, Mirallié S, Selleret L, Prades-Borio M, Neuraz A, Barraud-Lange V, Boissel N, Fortin A, Poirot C. Efficacy of assisted reproductive technology after ovarian tissue transplantation in a cohort of 11 patients with or without associated infertility factors. J Assist Reprod Genet 2021; 38:503-511. [PMID: 33389379 DOI: 10.1007/s10815-020-02033-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 12/10/2020] [Indexed: 11/25/2022] Open
Abstract
PURPOSE IVF treatment in women with grafted frozen-thawed ovarian tissue is associated with poor reproductive outcomes. The aim of this study was to evaluate the efficacy of ovarian tissue transplantation (OTT) followed by assisted reproductive technology (ART) in women with or without associated infertility factors. METHODS This is a prospective cohort study with retrospective data collection including eleven women, four of whom having an infertility factor (IF), who had undergone OTT in one university center between 2005 and 2017, followed by ART in six in vitro fertilization (IVF) centers. RESULTS In total, 25 of the 85 cycles initiated (29%) were canceled, resulting in 60 oocyte retrievals. Ninety-five oocytes were retrieved: 36 were abnormal or immature, 29/39 fertilized (74%) after ICSI and 13/20 (65%) after IVF. Thirty-five embryos were transferred in seven patients (5/7 patients without IF and 2/4 patients with IF). After ART, one patient with IF experienced two pregnancies, one resulting in a live birth. For all patients, pregnancy rates and live birth rates were 7.4% and 3.7% per embryo transfer, respectively. Nine pregnancies and four live births occurred after spontaneous conception in five patients without IF, none in the infertility group. CONCLUSION This study confirms that IVF treatment in women with grafted frozen-thawed ovarian tissue is associated with poor outcomes. However, the chances of natural conception are high in women without IF. Patients with IF, without the possibility of spontaneous pregnancy, should be informed of poor reproductive outcomes after OTT followed by ART. TRIAL REGISTRATION NUMBER NCT02184806.
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Affiliation(s)
- M Vatel
- Department of Reproductive Medicine, Clinique de la Muette, 75116, Paris, France
| | - A Torre
- Division of Child Health, Department of Obstetrics and Gynaecology, University of Nottingham, Nottingham, UK
| | - B Paillusson
- Department of Reproductive Medicine, Poissy Saint-Germain-en-Laye Hospital, 78300, Poissy, France
| | - F Scheffler
- Department of Reproductive Medicine, Amiens Hospital, 80054, Amiens, France
| | - M Bergere
- Department of Reproductive Biology, Poissy Saint-Germain-en-Laye Hospital, 78300, Poissy, France
| | - M Benkhalifa
- Medicine and Reproductive Biology, University Hospital and School of Medicine, Picardy Jules Verne University, 80054, Amiens, France.,Peritox-INERIS, UMR-I 01, Joint Research Centre, Picardy Jules Verne University, 80054, Amiens, France
| | - M-T Le Martelot
- Department of Reproductive Medicine, Brest Hospital, 29200, Brest, France
| | - F Leperlier
- Department of Reproductive Medicine and Biology, Nantes Hospital, 44000, Nantes, France
| | - S Mirallié
- Department of Reproductive Medicine and Biology, Nantes Hospital, 44000, Nantes, France
| | - L Selleret
- Department of Gynecology and Obstetrics, Assistance Publique des Hôpitaux de Paris (AP-HP), Tenon Hospital, 75020, Paris, France
| | - M Prades-Borio
- Department of Reproductive Biology, Assistance Publique des Hôpitaux de Paris (AP-HP), Tenon Hospital, 75020, Paris, France
| | - A Neuraz
- Department of Gynecology and Obstetrics, Les Bluets Hospital, 75012, Paris, France
| | - V Barraud-Lange
- Department of Reproductive Biology, Assistance Publique-Hôpitaux de Paris (AP-HP), Cochin Hospital, 75014, Paris, France
| | - N Boissel
- Department of Hematology, Adolescents and Young Adults Unit, Fertility Preservation, Assistance Publique-Hôpitaux de Paris (AP-HP), Saint-Louis Hospital, 1 Avenue Claude Vellefaux, 75010, Paris, France.,Paris University, EA3518, 75006, Paris, France
| | - A Fortin
- Department of Obstetrics and Gynecology, Assistance Publique des Hôpitaux de Paris (AP-HP), Pitié-Salpétrière Hospital, 75013, Paris, France
| | - C Poirot
- Department of Hematology, Adolescents and Young Adults Unit, Fertility Preservation, Assistance Publique-Hôpitaux de Paris (AP-HP), Saint-Louis Hospital, 1 Avenue Claude Vellefaux, 75010, Paris, France. .,Médecine Sorbonne University, 75005, Paris, France.
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Jean C, Haghighirad F, Zhu Y, Chalbi M, Ziyyat A, Rubinstein E, Gourier C, Yip P, Wolf JP, Lee JE, Boucheix C, Barraud-Lange V. JUNO, the receptor of sperm IZUMO1, is expressed by the human oocyte and is essential for human fertilisation. Hum Reprod 2019; 34:118-126. [PMID: 30517645 DOI: 10.1093/humrep/dey340] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Indexed: 12/27/2022] Open
Abstract
STUDY QUESTION Is JUNO protein present at the surface membrane of human oocytes and involved in the fertilisation process? SUMMARY ANSWER JUNO protein is expressed on the plasma membrane of human oocytes and its inhibition by a monoclonal antibody completely blocks gamete fusion. WHAT IS KNOWN ALREADY Fusion of gamete membranes is the culminating event of the fertilisation process, but its molecular mechanisms are poorly understood. Until now, three molecules have been shown to be essential: CD9 tetraspanin in the oocyte, Izumo1 protein on the sperm and Juno, its corresponding receptor on the oocyte. Oocyte CD9 and sperm IZUMO1 have been identified in human gametes and their interaction is also well-conserved among several mammalian species. The presence of JUNO on human oocytes, however, has not yet been reported, nor has its role in fertilisation been investigated. STUDY DESIGN, SIZE, DURATION We selected an anti-human JUNO antibody in order to investigate the presence of JUNO on the oocyte membrane surface and studied its potential involvement in gamete membrane interaction during fertilisation. PARTICIPANTS/MATERIALS, SETTING, METHODS Monoclonal antibodies against human JUNO (anti-hJUNO mAb) were produced by immunisation of mice with HEK cells transfected with the putative human JUNO sequence (HEK-hJUNO). These antibodies were used for immunostaining experiments and in vitro fertilisation assays with human gametes (GERMETHEQUE Biobank). MAIN RESULTS AND THE ROLE OF CHANCE Three hybridoma supernatants, verified by immunostaining, revealed specifically HEK-hJUNO cells. The three purified monoclonal antibodies, FJ2E4 (IgG1), FJ8E8 (IgG1) and FJ4F5 (IgG2a), recognised the soluble recombinant human JUNO protein and, in a western blot of HEK-hJUNO extracts, a protein with an expected MW of 25 kDa. In addition, soluble recombinant human IZUMO protein inhibited the binding of anti-hJUNO mAbs to cells expressing hJUNO. Using these anti-hJUNO mAbs in immunostaining, we identified the presence of JUNO protein at the plasma membrane of human oocytes. Furthermore, we revealed a progressive expression of JUNO according to oocyte maturity. Finally, we showed that human zona-free oocytes, inseminated in the presence of anti-hJUNO mAb, were not fertilised by human sperm. These results suggest that, as seen in the mouse, JUNO is indeed involved in human gamete membrane fusion during fertilisation. LARGE-SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION In accordance with French bioethics laws, functional tests were performed using zona-free oocytes, which of course does not fully encompass all normal in vivo physiological conditions. However, these in vitro tests do provide direct information regarding sperm-oocyte membrane interactions. WIDER IMPLICATIONS OF THE FINDINGS Mechanisms of gamete fusion appear to be homologous between mice and humans. However, some differences do exist and analysing the human mechanisms is essential. In fact, this is the first report describing the presence of JUNO on human oocytes and its involvement in human fertilisation. This discovery allows further examination of the understanding of molecular mechanisms that drive gamete fusion: a crucial challenge at a time when infertility affects 16% of reproductively active couples. STUDY FUNDING/COMPETING INTERESTS This work was supported by the Agence Nationale pour la Recherche, Grant no. ANR-13-BVS5-0004, and by Association Institut du Cancer et d'Immunogénétique (ICIG). There are no competing interests.
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Affiliation(s)
- C Jean
- University Paris Descartes, Sorbonne Paris Cité, Faculty of Medicine, Assistance Publique-Hôpitaux de Paris, University Hospital Paris Centre, CHU Cochin, Laboratory of Histology Embryology Biology of Reproduction, 123 boulevard de Port Royal, Paris, France.,Department of Genetic, Development and Cancer, Cochin Institute, Inserm U1016, Team Genomic Epigenetic and Physiopathology of Reproduction, University Paris Descartes, Sorbonne Paris Cité, 22 rue Méchain, Paris, France
| | - F Haghighirad
- Inserm, UMR-S 935, SFR André Lwoff, 12 Avenue Paul Vaillant Couturier, Villejuif, France.,University Paris-Sud 11, UFR Medicine, 63 rue Gabriel Péri, Le Kremlin Bicêtre, France
| | - Y Zhu
- Inserm, UMR-S 935, SFR André Lwoff, 12 Avenue Paul Vaillant Couturier, Villejuif, France.,University Paris-Sud 11, UFR Medicine, 63 rue Gabriel Péri, Le Kremlin Bicêtre, France.,Department of Oncology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - M Chalbi
- Laboratory of Physic Statistic, Ecole Normale Superieure/PSL Research University, UPMC University Paris 6, University Paris Diderot, CNRS, 24 rue Lhomond, Paris, France
| | - A Ziyyat
- Department of Genetic, Development and Cancer, Cochin Institute, Inserm U1016, Team Genomic Epigenetic and Physiopathology of Reproduction, University Paris Descartes, Sorbonne Paris Cité, 22 rue Méchain, Paris, France
| | - E Rubinstein
- Inserm, UMR-S 935, SFR André Lwoff, 12 Avenue Paul Vaillant Couturier, Villejuif, France.,University Paris-Sud 11, UFR Medicine, 63 rue Gabriel Péri, Le Kremlin Bicêtre, France
| | - C Gourier
- Laboratory of Physic Statistic, Ecole Normale Superieure/PSL Research University, UPMC University Paris 6, University Paris Diderot, CNRS, 24 rue Lhomond, Paris, France
| | - P Yip
- Faculty of Medicine, Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Room 6314, Toronto, ON, Canada
| | - J P Wolf
- University Paris Descartes, Sorbonne Paris Cité, Faculty of Medicine, Assistance Publique-Hôpitaux de Paris, University Hospital Paris Centre, CHU Cochin, Laboratory of Histology Embryology Biology of Reproduction, 123 boulevard de Port Royal, Paris, France.,Department of Genetic, Development and Cancer, Cochin Institute, Inserm U1016, Team Genomic Epigenetic and Physiopathology of Reproduction, University Paris Descartes, Sorbonne Paris Cité, 22 rue Méchain, Paris, France
| | - J E Lee
- Faculty of Medicine, Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Room 6314, Toronto, ON, Canada
| | - C Boucheix
- Inserm, UMR-S 935, SFR André Lwoff, 12 Avenue Paul Vaillant Couturier, Villejuif, France.,University Paris-Sud 11, UFR Medicine, 63 rue Gabriel Péri, Le Kremlin Bicêtre, France
| | - V Barraud-Lange
- University Paris Descartes, Sorbonne Paris Cité, Faculty of Medicine, Assistance Publique-Hôpitaux de Paris, University Hospital Paris Centre, CHU Cochin, Laboratory of Histology Embryology Biology of Reproduction, 123 boulevard de Port Royal, Paris, France.,Department of Genetic, Development and Cancer, Cochin Institute, Inserm U1016, Team Genomic Epigenetic and Physiopathology of Reproduction, University Paris Descartes, Sorbonne Paris Cité, 22 rue Méchain, Paris, France
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Le Foll N, Pont JC, Wolf JP, Ziyyat A, Juillard JC, Barraud-Lange V. Prostatite, fertilité : le point de vue du biologiste. ACTA ACUST UNITED AC 2012; 40:490-3. [DOI: 10.1016/j.gyobfe.2012.07.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 07/09/2012] [Indexed: 10/28/2022]
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Wolf J, Ziyyat A, Barraud-Lange V, Lefevre B, Carroll J. SESSION 57: THE BIOLOGY OF FERTILIZATION: THE CONSEQUENCES OF GAMETE INTERACTION. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.56] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Pourret E, Assou S, Monzo C, Haouzi D, Dechaud H, Hamamah S, Capalbo A, Wright G, Elliott T, Ubaldi FM, Rienzi L, Nagy ZP, Gil-Sanchis C, Cervello I, Santamaria X, Mas A, Faus A, Garrido-Gomez T, Quinonero A, Pellicer A, Simon C, Katsiani E, Garas A, Skentou C, Tsezou A, Dafopoulos K, Messinis IE, Barraud-Lange V, Firlej V, Lassale B, Fouchet P, Wolf JP. SESSION 17: STEM CELLS AND ART: A NEVER-ENDING STORY. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kacem O, Sifer C, Barraud-Lange V, Ducot B, De Ziegler D, Poirot C, Wolf J. Sperm nuclear vacuoles, as assessed by motile sperm organellar morphological examination, are mostly of acrosomal origin. Reprod Biomed Online 2009; 20:132-7. [PMID: 20158998 DOI: 10.1016/j.rbmo.2009.10.014] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2009] [Revised: 04/22/2009] [Accepted: 09/16/2009] [Indexed: 11/19/2022]
Abstract
Microinjection of nuclear vacuole-free spermatozoa selected by motile sperm organellar morphological examination (MSOME) has been claimed to enhance assisted reproduction treatment outcome compared with intracytoplasmic sperm injection. However, the nature of these nuclear vacuoles is unclear, since their localization at the front of the sperm head suggests they might be of acrosomal origin. To study this hypothesis, acrosomal status was evaluated using Pisum sativum agglutinin staining on a smear, together with sperm organellar morphological examination using the same optics as for MSOME on 30 sperm samples from infertile patients, yielding >3200 spermatozoa. Vacuoles were present in 61% of spermatozoa when acrosomal material or intact acrosomes were observed, versus 29% when spermatozoa were acrosome reacted (P<0.0001). Induction of the acrosomal reaction by ionophore A23587 from 17.4% to 36.1% significantly increased the percentage of vacuole-free spermatozoa from 41.2% to 63.8% (P<0.001). These data suggest that most nuclear vacuoles are of acrosomal origin. Hence, the best spermatozoa selected by MSOME are mostly acrosome-reacted spermatozoa. As microinjection of spermatozoa with a persistent acrosome drastically hampers embryo development in animal models, this suggests that the improvement in pregnancy rates reported following intracytoplasmic injection of morphologically selected sperm might be due to the procedure allowing injection of acrosome-reacted spermatozoa.
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Affiliation(s)
- O Kacem
- Service d'Histologie-Embryologie-Biologie de la Reproduction, Hôpital Cochin, AP-HP, 123, Bd Port Royal 75013 Paris, Université Paris Descartes, France
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8
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Ziyyat A, Naud-Barriant N, Barraud-Lange V, Chevalier F, Kulski O, Lemkecher T, Bomsel M, Wolf JP. Cyclic FEE peptide increases human gamete fusion and potentiates its RGD-induced inhibition. Hum Reprod 2005; 20:3452-8. [PMID: 16096325 DOI: 10.1093/humrep/dei241] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Alpha6beta1 integrin has been proposed to act as a sperm receptor on the mouse oocyte by interacting with spermatozoon fertilin beta. We investigated, in humans, whether oocyte integrins could act similarly in gamete fusion, using a cyclic peptide containing the putative disintegrin-binding domain of human fertilin beta [cyclic FEE (cFEE)] and RGD peptide. METHODS Zona-free eggs were inseminated in the absence or presence of peptides. To maintain the membrane protein pattern, the zona pellucida was removed by microdissection. Immunofluorescence and confocal microscopy were used to detect integrin subunits on the oocyte. RESULTS Unexpectedly, cFEE alone increased human gamete fusion by 94% instead of inhibiting fertilization. Furthermore, cFEE together with RGD potentiated the RGD-induced inhibition of fertilization in a dose-dependent manner. The data suggested the hypothesis of integrin cross-talk, further supported by the co-localization of alpha6beta1 and alphavbeta3 integrins, the putative receptors of cFEE and RGD peptides, respectively. CONCLUSIONS RGD-sensitive and -insensitive integrins may be associated in a multimolecular complex working as a sperm receptor on the human oocyte membrane. Supplementation of human IVF culture medium with cFEE peptide might improve fertilization rates in ART.
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Affiliation(s)
- A Ziyyat
- Laboratoire de Biologie de la Reproduction, UPRES 3410, UFR SMBH, Université Paris 13, 74, rue Marcel Cachin, 93017 Bobigny, Service d'Histologie-Embryologie-Cytogénétique, Hôpital Jean Verdier (Assistance Publique-Hôpitaux de Paris), Bondy, France
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9
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Lemkecher T, Dartigues S, Vaysse J, Kulski O, Barraud-Lange V, Gattegno L, Wolf JP. Leucospermie, stress oxydatif et fertilité masculine : certitudes et hypothèses. ACTA ACUST UNITED AC 2005; 33:2-10. [PMID: 15752659 DOI: 10.1016/j.gyobfe.2005.01.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2004] [Accepted: 11/15/2004] [Indexed: 10/25/2022]
Abstract
Leukocytospermia is frequent and significantly increased (over 10(6)/ml) in 20% of male factor infertility. It induces the production of highly toxic reactive oxygen species (ROS) which impair genital track accessory glands and sperm cell functions. The seminal medium contains extremely potent antioxidative defenses which usually balance the oxidative stress. In vivo, these defenses can be overwhelmed when ROS production is extremely important and/or when it lasts for a very long period of time. Infertility can then appear. In vitro, ROS have been univoqually demonstrated for being highly toxic since spermatozoa are no longer protected. Sperm cell defects are : decrease of acrosome reaction and fusiogenic ability and increase of DNA fragmentations. In case of male factor infertility, a leukocytospermia represents an essential or an additional risk factor that should be treated, specially when in vitro therapy is to be scheduled, in order to improve gamete quality.
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Affiliation(s)
- T Lemkecher
- Laboratoire de biologie de la reproduction, service d'histologie-embryologie-cytogénétique, hôpital Jean-Verdier AP-HP, avenue du 14-Juillet, 93140 Bondy, France
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