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Ghevaria H, SenGupta S, Naja R, Odia R, Exeter H, Serhal P, Gonzalez XV, Sun X, Delhanty J. Next Generation Sequencing Detects Premeiotic Errors in Human Oocytes. Int J Mol Sci 2022; 23:ijms23020665. [PMID: 35054849 PMCID: PMC8776218 DOI: 10.3390/ijms23020665] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/24/2021] [Accepted: 01/04/2022] [Indexed: 02/06/2023] Open
Abstract
Autosomal aneuploidy is the leading cause of embryonic and foetal death in humans. This arises mainly from errors in meiosis I or II of oogenesis. A largely ignored source of error stems from germinal mosaicism, which leads to premeiotic aneuploidy. Molecular cytogenetic studies employing metaphase fluorescence in situ hybridization and comparative genomic hybridisation suggest that premeiotic aneuploidy may affect 10–20% of oocytes overall. Such studies have been criticised on technical grounds. We report here an independent study carried out on unmanipulated oocytes that have been analysed using next generation sequencing (NGS). This study confirms that the incidence of premeiotic aneuploidy in an unselected series of oocytes exceeds 10%. A total of 140 oocytes donated by 42 women gave conclusive results; of these, 124 (88.5%) were euploid. Sixteen out of 140 (11.4%) provided evidence of premeiotic aneuploidy. Of the 140, 112 oocytes were immature (germinal vesicle or metaphase I), of which 10 were aneuploid (8.93%); the remaining 28 were intact metaphase II - first polar body complexes, and six of these were aneuploid (21.4%). Of the 16 aneuploid cells, half contained simple errors (one or two abnormal chromosomes) and half contained complex errors. We conclude that germinal mosaicism leading to premeiotic aneuploidy is a consistent finding affecting at least 10% of unselected oocytes from women undergoing egg collection for a variety of reasons. The importance of premeiotic aneuploidy lies in the fact that, for individual oocytes, it greatly increases the risk of an aneuploid mature oocyte irrespective of maternal age. As such, this may account for some cases of aneuploid conceptions in very young women.
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Affiliation(s)
- Harita Ghevaria
- Preimplantation Genetics Group, Institute for Women’s Health, University College London (UCL), London WC1E 6HX, UK; (H.G.); (R.N.); (X.V.G.); (X.S.); (J.D.)
| | - Sioban SenGupta
- Preimplantation Genetics Group, Institute for Women’s Health, University College London (UCL), London WC1E 6HX, UK; (H.G.); (R.N.); (X.V.G.); (X.S.); (J.D.)
- Correspondence:
| | - Roy Naja
- Preimplantation Genetics Group, Institute for Women’s Health, University College London (UCL), London WC1E 6HX, UK; (H.G.); (R.N.); (X.V.G.); (X.S.); (J.D.)
| | - Rabi Odia
- Embryology Department, The Centre for Reproductive and Genetic Health, London W1W 5QS, UK; (R.O.); (H.E.)
| | - Holly Exeter
- Embryology Department, The Centre for Reproductive and Genetic Health, London W1W 5QS, UK; (R.O.); (H.E.)
| | - Paul Serhal
- Clinical Department, The Centre for Reproductive and Genetic Health, London W1W 5QS, UK;
| | - Xavier Viñals Gonzalez
- Preimplantation Genetics Group, Institute for Women’s Health, University College London (UCL), London WC1E 6HX, UK; (H.G.); (R.N.); (X.V.G.); (X.S.); (J.D.)
| | - Xuhui Sun
- Preimplantation Genetics Group, Institute for Women’s Health, University College London (UCL), London WC1E 6HX, UK; (H.G.); (R.N.); (X.V.G.); (X.S.); (J.D.)
| | - Joy Delhanty
- Preimplantation Genetics Group, Institute for Women’s Health, University College London (UCL), London WC1E 6HX, UK; (H.G.); (R.N.); (X.V.G.); (X.S.); (J.D.)
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Delhanty JDA, SenGupta SB, Ghevaria H. How common is germinal mosaicism that leads to premeiotic aneuploidy in the female? J Assist Reprod Genet 2019; 36:2403-2418. [PMID: 31705227 PMCID: PMC6910893 DOI: 10.1007/s10815-019-01596-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 09/25/2019] [Indexed: 11/25/2022] Open
Abstract
Purpose Molecular cytogenetic analysis has confirmed that a proportion of apparently meiotic aneuploidy may be present in the germ cells prior to the onset of meiosis, but there is no clear perception of its frequency. The aim of this review is to assess the evidence for premeiotic aneuploidy from a variety of sources to arrive at an estimate of its overall contribution to oocyte aneuploidy in humans. Methods Relevant scientific literature was covered from 1985 to 2018 by searching PubMed databases with search terms: gonadal/germinal mosaicism, ovarian mosaicism, premeiotic aneuploidy, meiosis and trisomy 21. Additionally, a key reference from 1966 was included. Results Data from over 9000 cases of Down syndrome showed a bimodal maternal age distribution curve, indicating two overlapping distributions. One of these matched the pattern for the control population, with a peak at about 28 years and included all cases that had occurred independently of maternal age, including those due to germinal mosaicism, about 40% of the cohort. The first cytological proof of germinal mosaicism was obtained by fluorescence in situ hybridisation analysis. Comparative genomic hybridisation analysis of oocyte chromosomes suggests an incidence of up to 15% in premeiotic oocytes. Direct investigation of fetal ovarian cells led to variable results for chromosome 21 mosaicism. Conclusions Oocytes with premeiotic errors will significantly contribute to the high level of preimplantation and prenatal death. Data so far available suggests that, depending upon the maternal age, up to 40% of aneuploidy that is present in oocytes at the end of meiosis I may be due to germinal mosaicism.
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Affiliation(s)
- Joy DA Delhanty
- Preimplantation Genetics Group, Institute for Women's Health, University College London, 86-96 Chenies Mews, London, WC1E 6HX, U.K
| | - Sioban B SenGupta
- Preimplantation Genetics Group, Institute for Women's Health, University College London, 86-96 Chenies Mews, London, WC1E 6HX, U.K
| | - Harita Ghevaria
- Preimplantation Genetics Group, Institute for Women's Health, University College London, 86-96 Chenies Mews, London, WC1E 6HX, U.K..
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Novel Double Factor PGT strategy analyzing blastocyst stage embryos in a single NGS procedure. PLoS One 2018; 13:e0205692. [PMID: 30332465 PMCID: PMC6192598 DOI: 10.1371/journal.pone.0205692] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 09/28/2018] [Indexed: 12/16/2022] Open
Abstract
In families at risk from monogenic diseases affected offspring, it is fundamental the development of a suitable Double Factor Preimplantation Genetic Testing (DF-PGT) method for both single-gene analysis and chromosome complement screening. Aneuploidy is not only a major issue in advanced-maternal-age patients and balanced translocation carriers, but also the aneuploidy rate is extremely high in patients undergoing in vitro fertilization (IVF), even in young donors. To adequate NGS technology to the DF-PGT strategy four different whole genome amplification systems (Sureplex, MALBAC, and two multiple displacement amplification systems-MDA) were tested using TruSight One panel on cell lines and blastocyst trophectoderm biopsies-TE. Embryo cytogenetic status was analyzed by Nexus software. Sureplex and MALBAC DNA products were considered not suitable for PGT diagnosis due to inconsistent and poor results on Trusight one (TSO) panel. Results obtained with both MDA based methods (GEH-MDA and RG-MDA) were appropriate for direct mutation detection by TSO NGS platform. Nevertheless, RG-MDA amplification products showed better coverage and lower ADO rates than GEH-MDA. The present work also demonstrates that the same TSO sequencing data is suitable not only for the direct mutation detection, but also for the indirect mutation detection by linkage analysis of informative SNPs. The present work also demonstrates that Nexus software is competent for the detection of CNV by using with TSO sequencing data from RG-MDA products, allowing for the whole cytogenetic characterization of the embryos. In conclusion, successfully development of an innovative and promising DF-PGT strategy using TSO-NGS technology in TE biopsies, performed in-house in a single laboratory experience, has been done in the present work. Additional studies should be performed before it could be used as a diagnostic alternative in order to validate this approach for the detection of chromosomal aneuploidies.
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Webster A, Schuh M. Mechanisms of Aneuploidy in Human Eggs. Trends Cell Biol 2016; 27:55-68. [PMID: 27773484 DOI: 10.1016/j.tcb.2016.09.002] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 08/03/2016] [Accepted: 09/02/2016] [Indexed: 01/24/2023]
Abstract
Eggs and sperm develop through a specialized cell division called meiosis. During meiosis, the number of chromosomes is reduced by two sequential divisions in preparation for fertilization. In human female meiosis, chromosomes frequently segregate incorrectly, resulting in eggs with an abnormal number of chromosomes. When fertilized, these eggs give rise to aneuploid embryos that usually fail to develop. As women become older, errors in meiosis occur more frequently, resulting in increased risks of infertility, miscarriage, and congenital syndromes, such as Down's syndrome. Here, we review recent studies that identify the mechanisms causing aneuploidy in female meiosis, with a particular emphasis on studies in humans.
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Affiliation(s)
- Alexandre Webster
- Department of Meiosis, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, D-37077, Göttingen, Germany
| | - Melina Schuh
- Department of Meiosis, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, D-37077, Göttingen, Germany.
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Daina G, Ramos L, Obradors A, Rius M, del Rey J, Martinez-Pasarell O, Pujol A, Benet J, Navarro Ferreté J. Double-factor preimplantation genetic diagnosis: monogenic and cytogenetic diagnoses analyzing a single blastomere. Prenat Diagn 2015; 35:1301-7. [DOI: 10.1002/pd.4691] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 09/07/2015] [Accepted: 09/14/2015] [Indexed: 01/02/2023]
Affiliation(s)
- Gemma Daina
- Unitat de Biologia Cel·lular i Genètica Mèdica, Facultat de Medicina, Departament de Biologia Cel·lular, Fisiologia i Immunologia; Universitat Autònoma de Barcelona; Barcelona Spain
- Càtedra de Recerca Eugin-UAB; Barcelona Spain
| | - Laia Ramos
- Unitat de Biologia Cel·lular i Genètica Mèdica, Facultat de Medicina, Departament de Biologia Cel·lular, Fisiologia i Immunologia; Universitat Autònoma de Barcelona; Barcelona Spain
| | - Albert Obradors
- Càtedra de Recerca Eugin-UAB; Barcelona Spain
- Clínica Eugin; Barcelona Spain
| | - Mariona Rius
- Unitat de Biologia Cel·lular i Genètica Mèdica, Facultat de Medicina, Departament de Biologia Cel·lular, Fisiologia i Immunologia; Universitat Autònoma de Barcelona; Barcelona Spain
| | - Javier del Rey
- Unitat de Biologia Cel·lular i Genètica Mèdica, Facultat de Medicina, Departament de Biologia Cel·lular, Fisiologia i Immunologia; Universitat Autònoma de Barcelona; Barcelona Spain
- Càtedra de Recerca Eugin-UAB; Barcelona Spain
| | | | | | - Jordi Benet
- Unitat de Biologia Cel·lular i Genètica Mèdica, Facultat de Medicina, Departament de Biologia Cel·lular, Fisiologia i Immunologia; Universitat Autònoma de Barcelona; Barcelona Spain
- Càtedra de Recerca Eugin-UAB; Barcelona Spain
| | - Joaquima Navarro Ferreté
- Unitat de Biologia Cel·lular i Genètica Mèdica, Facultat de Medicina, Departament de Biologia Cel·lular, Fisiologia i Immunologia; Universitat Autònoma de Barcelona; Barcelona Spain
- Càtedra de Recerca Eugin-UAB; Barcelona Spain
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Ghevaria H, SenGupta S, Sarna U, Sargeant S, Serhal P, Delhanty J. The contribution of germinal mosaicism to human aneuploidy. Cytogenet Genome Res 2015; 144:264-74. [PMID: 25833719 DOI: 10.1159/000381073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2015] [Indexed: 11/19/2022] Open
Abstract
Germinal mosaicism in a parent is considered to be a rare cause of aneuploidy in the offspring. The aim of this study was to assess the incidence of pre-meiotic errors, indicative of germinal mosaicism, leading to aneuploidy compared with those that occur at meiosis I. The material consisted of 126 oocytes, unexposed to sperm, donated by 57 women with an average maternal age of 35. The oocytes were at various stages of maturity and were analysed by array comparative genomic hybridisation. Of these, 102 gave conclusive results, comprising 47 that were immature, at the germinal vesicle (GV) or metaphase I stage (MI); 34 complete metaphase II-first polar body (MII-PB) complexes together with 21 incomplete complexes. Oocytes at the GV or MI stage provide direct evidence of pre-meiotic aneuploidy. Complete MII-PB complexes with the expected reciprocal gains/losses provide information on MI errors; those with non-reciprocal gains have pre-meiotic errors. Overall, 29 oocytes were aneuploid, and the source of the error was known for 21. In 8 (from 7 women) the error was pre-meiotic consisting of 4 MI oocytes and 4 MII-PB complexes with non-reciprocal gains. The remaining 13 were the result of errors at meiosis I. Although pre-meiotic errors occurred in only 10% of informative oocytes, most notable was the fact that for those oocytes where the source of the error was known, 38% were caused by germinal mosaicism compared with 62% that were the outcome of a meiosis I error. None of the women with germinal mosaicism were infertile.
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Affiliation(s)
- Harita Ghevaria
- Preimplantation Genetics Group, Institute for Women's Health, University College London, London, UK
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Jiao ZX, Xu M, Woodruff TK. Age-related increase in aneuploidy and alteration of gene expression in mouse first polar bodies. J Assist Reprod Genet 2015; 31:731-7. [PMID: 24658923 DOI: 10.1007/s10815-014-0210-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 03/04/2014] [Indexed: 12/12/2022] Open
Abstract
PURPOSE To confirm that aneuploidy candidate genes are detectable in the first polar body (PB(1)) of MII oocytes and to investigate the age-dependent molecular changes in PB(1). METHODS Aged (12-to 15-mo-old) and young (2-mo-old) mice were administered pregnant mare's serum gonadotropin (PMSG) and human chorionic gonadotrophin (hCG). MII oocytes were obtained and the first PB was removed. mRNA from each PB and its sibling oocyte was reverse transcribed. Real-time PCR was performed to quantify the expression of six genes (BUB1, CDC20, Filia, MCAK, SGOL1, SMC1A) in single PB. RESULTS We first demonstrated that detection and quantification of transcripts associated with aneuploidy in single mouse oocyte and sibling PB(1) is possible and the relative abundance of mRNA transcripts in a single PB faithfully reflects the relative abundance of that transcript in its sibling oocyte. We further found that transcript levels were significantly lower in aged PBs compared with young PBs (P<0.05). CONCLUSIONS Our results suggest that the detection and analysis of polar body mRNA may provide insight in age-related aneuploidy in oocyte. This analysis is a novel concept to investigate the genesis of chromosome abnormality and could potentially assist in the characterization of mechanisms underlying key molecular origin of female meiotic aneuploidy, which would be of great scientific and clinical value.
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Non-meiotic chromosome instability in human immature oocytes. Eur J Hum Genet 2013; 22:202-7. [PMID: 23695274 DOI: 10.1038/ejhg.2013.106] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 03/23/2013] [Accepted: 04/19/2013] [Indexed: 12/20/2022] Open
Abstract
Aneuploidy has been a major issue in human gametes and is closely related to fertility problems, as it is known to be present in cleavage stage embryos and gestational losses. Pre-meiotic chromosome abnormalities in women have been previously described. The aim of this study is to assess the whole-chromosome complement in immature oocytes to find those abnormalities caused by mitotic instability. For this purpose, a total of 157 oocytes at the germinal vesicle or metaphase I stage, and discarded from IVF cycles, were analysed by CGH. Fifty-six women, between 18 and 45 years old (mean 32.5 years), including 32 IVF patients (25-45 years of age) and 24 IVF oocyte donors (18-33 years of age), were included in the study. A total of 25/157 (15.9%) of the oocytes analysed, obtained from three IVF clinics, contained chromosome abnormalities, including both aneuploidy (24/157) and structural aberrations (9/157). Independently of the maternal age, the incidence of abnormal oocytes which originated before meiosis is 15.9%, and these imbalances were found in 33.9% of the females studied. This work sheds light on the relevance of mitotic instability responsible for the generation of the abnormalities present in human oocytes.
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Velilla E, Fernández SF, Suñol J, López-Teijón M. A study of meiotic segregation in a fertile human population following ovarian stimulation with recombinant FSH-LH. J Assist Reprod Genet 2013; 30:269-74. [PMID: 23307445 DOI: 10.1007/s10815-012-9905-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 11/25/2012] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE The aim of the study is to investigate the meiotic segregation in fresh eggs from anonymous egg donors and to analyze the baseline levels of aneuploidy in this population. RESULTS The study includes the largest series of donor eggs so far studied: 203 eggs from donors aged between 20 and 31 years. No diagnosis was obtained in 10.8 % of cases (22/ 203). The biopsy of the first and second polar bodies was completed in a sequential manner on day 0 and day 1 of embryo development. Chromosomes 13, 16, 18, 21 and 22 are analyzed by means of the FISH test. The diagnosable fertilized eggs gave an aneuploidy rate of 19.1 % (31/162), with 83.8 % (26/31) of the errors produced during meiosis I, 12.9 % (4/31) produced during meiosis II, and 3.2 % (1/31) produced during both meiosis I and II. The premature division of sister chromatids is the main source of meiotic error during Meiosis I, resulting in the creation of oocyte aneuploidy. CONCLUSIONS FISH analysis of the first and second polar body in donor oocytes gave an aneuploidy rate of 19.1 %. This study shows the majority of errors occur during Meiosis I.
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Affiliation(s)
- Esther Velilla
- Institut Marquès, C/Manuel Girona no. 33 La Masia-Clínica CIMA, Barcelona, Spain.
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Abstract
Chromosome segregation errors in female meiosis lead to aneuploidy in the resulting egg and embryo, making them one of the leading genetic causes of spontaneous abortions and developmental disabilities in humans. It is known that aneuploidy of meiotic origin increases dramatically as women age, and current evidence suggests that most errors occur in meiosis I. Several hypotheses regarding the cause of maternal age-related aneuploidy have been proposed, including recombination errors in early meiosis, a defective spindle assembly checkpoint in meiosis I, and deterioration of sister chromatid cohesion with age. This review discusses findings in each area, and focuses especially on recent studies suggesting that deterioration of cohesion with increasing maternal age is a leading cause of age-related aneuploidy.
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Affiliation(s)
- Teresa Chiang
- Department of Biology, University of Pennsylvania, Philadelphia, USA
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Magli MC, Grugnetti C, Castelletti E, Paviglianiti B, Ferraretti AP, Geraedts J, Gianaroli L. Five chromosome segregation in polar bodies and the corresponding oocyte. Reprod Biomed Online 2011; 24:331-8. [PMID: 22285244 DOI: 10.1016/j.rbmo.2011.11.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 11/16/2011] [Accepted: 11/17/2011] [Indexed: 11/25/2022]
Abstract
For a comprehensive picture of the meiotic process and to follow up its products, five chromosomes were tested by fluorescent in-situ hybridization in both polar bodies (PB) and corresponding 145 oocytes. Results were obtained in 143 sets and the prediction of euploidy or aneuploidy based on PB analysis was confirmed by direct analysis in 140 oocytes (98%). Concordance for all chromosomes was found in 132 oocytes, while in the remaining eight, at least one chromosome did not reflect the prediction made by the corresponding PB. When restricting the analysis to the 132 fully concordant oocytes, 215 errors were found in PB: 58% in PB1 and 42% in PB2. Premature separation of chromatids occurred in 89% of aneuploid PB1, whereas only 11% of errors derived from bivalent non-disjunction. In 19% of meiosis-I errors, a complementary error in meiosis II compensated the error originated in the first meiotic division. In conclusion, the testing of PB predicted reliably the oocyte’s chromosome condition. Although limited to five chromosomes, the follow up of meiosis by fluorescent in-situ hybridization provided a full description of chromosome allocation during the two divisions characterizing the nuclear maturation of the oocyte.
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Affiliation(s)
- M Cristina Magli
- S.I.S.Me.R., Reproductive Medicine Unit, Via Mazzini 12, 40138 Bologna, Italy
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Rius M, Obradors A, Daina G, Ramos L, Pujol A, Martínez-Passarell O, Marquès L, Oliver-Bonet M, Benet J, Navarro J. Detection of unbalanced chromosome segregations in preimplantation genetic diagnosis of translocations by short comparative genomic hibridization. Fertil Steril 2011; 96:134-42. [DOI: 10.1016/j.fertnstert.2011.04.052] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 03/30/2011] [Accepted: 04/11/2011] [Indexed: 12/22/2022]
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Obradors A, Rius M, Daina G, Ramos L, Benet J, Navarro J. Whole-chromosome aneuploidy analysis in human oocytes: focus on comparative genomic hybridization. Cytogenet Genome Res 2011; 133:119-26. [PMID: 21487227 DOI: 10.1159/000324233] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The study of aneuploidy in human oocytes, discarded from IVF cycles, has provided a better understanding of the incidence of aneuploidy of female origin and the responsible mechanisms. Comparative genomic hybridization (CGH) is an established technique that allows for the detection of aneuploidy in all chromosomes avoiding artifactual chromosome losses. In this review, results obtained using CGH in single cells (1PB and/or MII oocytes) are included. The results of oocyte aneuploidy rates obtained by CGH from discarded oocytes of IVF patients and of oocyte donors are summarized. Moreover, the mechanisms involved in the aneuploid events, e.g. whether alterations occurred due to first meiotic errors or germ-line mitotic errors are also discussed. Finally, the incidence of aneuploid oocyte production due to first meiotic errors and germ-line mitotic errors observed in oocytes coming from IVF patients and IVF oocyte donors was assessed.
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Affiliation(s)
- A Obradors
- Unitat de Biologia Cel·lular i Genètica Mèdica, Facultat de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
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Fenech M. Micronuclei and their association with sperm abnormalities, infertility, pregnancy loss, pre-eclampsia and intra-uterine growth restriction in humans. Mutagenesis 2011; 26:63-7. [PMID: 21164184 DOI: 10.1093/mutage/geq084] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The micronucleus (MN) assay is increasingly being used to study the association between DNA damage and infertility or pregnancy complications in humans. This review provides a brief overview of the studies published to date. The results of these studies appear to support the plausibility of the following hypotheses: (i) MN in spermatids in semen may be indicative of infertility risk, (ii) MN in peripheral blood lymphocytes in males correlate positively with DNA damage in sperm, (iii) infertile couples exhibit higher frequencies of MN than fertile couples and (iv) an abnormally high frequency of MN in peripheral blood lymphocytes is associated with pregnancy complications including miscarriage, intra-uterine growth restriction and pre-eclampsia. The studies published to date consistently indicate an association of MN in peripheral blood lymphocytes with impaired reproductive capacity. However, the conclusions of these studies, although statistically significant, are limited by small sample sizes and the need for verification in other independent cohorts. In conclusion, more attention should be given to the possibility of using MN assays in peripheral blood lymphocytes and reproductive tissues as a biomarker of risk for infertility and pregnancy complications in humans.
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Affiliation(s)
- Michael Fenech
- CSIRO Food and Nutritional Sciences, Gate 13, Kintore Avenue, Adelaide SA 5000, Australia.
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No relationship between the type of pituitary suppression for IVF and chromosomal abnormality rates of blastomeres: an observational study. Fertil Steril 2011; 95:563-7. [DOI: 10.1016/j.fertnstert.2010.05.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 05/01/2010] [Accepted: 05/11/2010] [Indexed: 11/21/2022]
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Fragouli E, Wells D, Delhanty J. Chromosome Abnormalities in the Human Oocyte. Cytogenet Genome Res 2011; 133:107-18. [DOI: 10.1159/000323801] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Rius M, Obradors A, Daina G, Cuzzi J, Marques L, Calderon G, Velilla E, Martinez-Passarell O, Oliver-Bonet M, Benet J, Navarro J. Reliability of short comparative genomic hybridization in fibroblasts and blastomeres for a comprehensive aneuploidy screening: first clinical application. Hum Reprod 2010; 25:1824-35. [DOI: 10.1093/humrep/deq118] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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