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Potabattula R, Prell A, Dittrich M, Nava C, Depienne C, Bejaoui Y, El Hajj N, Hahn T, Schorsch M, Haaf T. Effects of paternal and chronological age on BEGAIN methylation and its possible role in autism. Aging (Albany NY) 2023; 15:12763-12779. [PMID: 38019471 DOI: 10.18632/aging.205275] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 10/23/2023] [Indexed: 11/30/2023]
Abstract
Children from old fathers carry an increased risk for autism spectrum (ASD) and other neurodevelopmental disorders, which may at least partially be mediated by paternal age effects on the sperm epigenome. The brain enriched guanylate kinase associated (BEGAIN) protein is involved in protein-protein interactions at and transmission across synapses. Since several epigenome-wide methylation screens reported a paternal age effect on sperm BEGAIN methylation, here we confirmed a significant negative correlation between BEGAIN promoter methylation and paternal age, using more sensitive bisulfite pyrosequencing and a larger number of sperm samples. Paternal age-associated BEGAIN hypomethylation was also observed in fetal cord blood (FCB) of male but not of female offspring. There was no comparable maternal age effect on FCB methylation. In addition, we found a significant negative correlation between BEGAIN methylation and chronological age (ranging from 1 to 70 years) in peripheral blood samples of male but not of female donors. BEGAIN hypomethylation was more pronounced in male children, adolescents and adults suffering from ASD compared to controls. Both genetic variation (CC genotype of SNP rs7141087) and epigenetic factors may contribute to BEGAIN promoter hypomethylation. The age- and sex-specific BEGAIN methylation trajectories in the male germ line and somatic tissues, in particular the brain, support a role of this gene in ASD development.
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Affiliation(s)
- Ramya Potabattula
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Andreas Prell
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
- Department of Bioinformatics, Julius Maximilians University, Würzburg, Germany
| | - Caroline Nava
- U.F. de Neurogénétique Moléculaire et Cellulaire, Dpt. de Génétique et Cytogénétique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Christel Depienne
- Institute of Human Genetics, University Hospital Essen, Essen, Germany
| | - Yosra Bejaoui
- College of Health and Life Sciences and College of Science and Engineering, Hamad Bin Khalifa University, Doha, Qatar
| | - Nady El Hajj
- College of Health and Life Sciences and College of Science and Engineering, Hamad Bin Khalifa University, Doha, Qatar
| | | | | | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
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Bernhardt L, Dittrich M, Prell A, Potabattula R, Drummer C, Behr R, Hahn T, Schorsch M, Müller T, Haaf T. Age-related methylation changes in the human sperm epigenome. Aging (Albany NY) 2023; 15:1257-1278. [PMID: 36849136 PMCID: PMC10042684 DOI: 10.18632/aging.204546] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 02/16/2023] [Indexed: 03/01/2023]
Abstract
Advanced paternal age is associated with increased risks for reproductive and offspring medical problems. Accumulating evidence suggests age-related changes in the sperm epigenome as one underlying mechanism. Using reduced representation bisulfite sequencing on 73 sperm samples of males attending a fertility center, we identified 1,162 (74%) regions which were significantly (FDR-adjusted) hypomethylated and 403 regions (26%) being hypermethylated with age. There were no significant correlations with paternal BMI, semen quality, or ART outcome. The majority (1,152 of 1,565; 74%) of age-related differentially methylated regions (ageDMRs) were located within genic regions, including 1,002 genes with symbols. Hypomethylated ageDMRs were closer to transcription start sites than hypermethylated DMRs, half of which reside in gene-distal regions. In this and conceptually related genome-wide studies, so far 2,355 genes have been reported with significant sperm ageDMRs, however most (90%) of them in only one study. The 241 genes which have been replicated at least once showed significant functional enrichments in 41 biological processes associated with development and the nervous system and in 10 cellular components associated with synapses and neurons. This supports the hypothesis that paternal age effects on the sperm methylome affect offspring behaviour and neurodevelopment. It is interesting to note that sperm ageDMRs were not randomly distributed throughout the human genome; chromosome 19 showed a highly significant twofold enrichment with sperm ageDMRs. Although the high gene density and CpG content have been conserved, the orthologous marmoset chromosome 22 did not appear to exhibit an increased regulatory potential by age-related DNA methylation changes.
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Affiliation(s)
- Laura Bernhardt
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
- Department of Bioinformatics, Julius Maximilians University, Würzburg, Germany
| | - Andreas Prell
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Ramya Potabattula
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Charis Drummer
- Platform Degenerative Diseases, German Primate Center, Leibniz Institute for Primate Research, Göttingen and German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Rüdiger Behr
- Platform Degenerative Diseases, German Primate Center, Leibniz Institute for Primate Research, Göttingen and German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | | | | | - Tobias Müller
- Department of Bioinformatics, Julius Maximilians University, Würzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
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Prell A, Sen MO, Potabattula R, Bernhardt L, Dittrich M, Hahn T, Schorsch M, Zacchini F, Ptak GE, Niemann H, Haaf T. Species-Specific Paternal Age Effects and Sperm Methylation Levels of Developmentally Important Genes. Cells 2022; 11:cells11040731. [PMID: 35203380 PMCID: PMC8870257 DOI: 10.3390/cells11040731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/11/2022] [Accepted: 02/15/2022] [Indexed: 02/04/2023] Open
Abstract
A growing number of sperm methylome analyses have identified genomic loci that are susceptible to paternal age effects in a variety of mammalian species, including human, bovine, and mouse. However, there is little overlap between different data sets. Here, we studied whether or not paternal age effects on the sperm epigenome have been conserved in mammalian evolution and compared methylation patterns of orthologous regulatory regions (mainly gene promoters) containing both conserved and non-conserved CpG sites in 94 human, 36 bovine, and 94 mouse sperm samples, using bisulfite pyrosequencing. We discovered three (NFKB2, RASGEF1C, and RPL6) age-related differentially methylated regions (ageDMRs) in humans, four (CHD7, HDAC11, PAK1, and PTK2B) in bovines, and three (Def6, Nrxn2, and Tbx19) in mice. Remarkably, the identified sperm ageDMRs were all species-specific. Most ageDMRs were in genomic regions with medium methylation levels and large methylation variation. Orthologous regions in species not showing this age effect were either hypermethylated (>80%) or hypomethylated (<20%). In humans and mice, ageDMRs lost methylation, whereas bovine ageDMRs gained methylation with age. Our results are in line with the hypothesis that sperm ageDMRs are in regions under epigenomic evolution and may be part of an epigenetic mechanism(s) for lineage-specific environmental adaptations and provide a solid basis for studies on downstream effects in the genes analyzed here.
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Affiliation(s)
- Andreas Prell
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany; (A.P.); (M.O.S.); (R.P.); (L.B.); (M.D.)
| | - Mustafa Orkun Sen
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany; (A.P.); (M.O.S.); (R.P.); (L.B.); (M.D.)
| | - Ramya Potabattula
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany; (A.P.); (M.O.S.); (R.P.); (L.B.); (M.D.)
| | - Laura Bernhardt
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany; (A.P.); (M.O.S.); (R.P.); (L.B.); (M.D.)
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany; (A.P.); (M.O.S.); (R.P.); (L.B.); (M.D.)
- Department of Bioinformatics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Thomas Hahn
- Fertility Center, 65189 Wiesbaden, Germany; (T.H.); (M.S.)
| | | | - Federica Zacchini
- PERCUROS BV, 2333 CL Leiden, The Netherlands;
- Malopolska Centre of Biotechnology, Jagiellonian University, 30-387 Krakow, Poland;
- Wolfson Centre for Age-Related Diseases, King’s College London, London SE1 1UL, UK
| | - Grazyna Ewa Ptak
- Malopolska Centre of Biotechnology, Jagiellonian University, 30-387 Krakow, Poland;
| | - Heiner Niemann
- Clinic for Gastroenterology, Hepatology and Endocrinology, Medical University Hannover, 30625 Hannover, Germany;
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany; (A.P.); (M.O.S.); (R.P.); (L.B.); (M.D.)
- Correspondence: ; Tel.: +49-931-3188738
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Potabattula R, Zacchini F, Ptak GE, Dittrich M, Müller T, El Hajj N, Hahn T, Drummer C, Behr R, Lucas‐Hahn A, Niemann H, Schorsch M, Haaf T. Increasing methylation of sperm rDNA and other repetitive elements in the aging male mammalian germline. Aging Cell 2020; 19:e13181. [PMID: 32608562 PMCID: PMC7431825 DOI: 10.1111/acel.13181] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/06/2020] [Accepted: 06/01/2020] [Indexed: 01/08/2023] Open
Abstract
In somatic cells/tissues, methylation of ribosomal DNA (rDNA) increases with age and age‐related pathologies, which has a direct impact on the regulation of nucleolar activity and cellular metabolism. Here, we used bisulfite pyrosequencing and show that methylation of the rDNA transcription unit including upstream control element (UCE), core promoter, 18S rDNA, and 28S rDNA in human sperm also significantly increases with donor's age. This positive correlation between sperm rDNA methylation and biological age is evolutionarily conserved among mammals with widely different life spans such as humans, marmoset, bovine, and mouse. Similar to the tandemly repeated rDNA, methylation of human α‐satellite and interspersed LINE1 repeats, marmoset α‐satellite, bovine alpha‐ and testis satellite I, mouse minor and major satellite, and LINE1‐T repeats increases in the aging male germline, probably related to their sperm histone packaging. Deep bisulfite sequencing of single rDNA molecules in human sperm revealed that methylation does not only depend on donor's age, but also depend on the region and sequence context (A vs. G alleles). Both average rDNA methylation of all analyzed DNA molecules and the number of fully (>50%) methylated alleles, which are thought to be epigenetically silenced, increase with donor's age. All analyzed CpGs in the sperm rDNA transcription unit show comparable age‐related methylation changes. Unlike other epigenetic aging markers, the rDNA clock appears to operate in similar ways in germline and soma in different mammalian species. We propose that sperm rDNA methylation, directly or indirectly, influences nucleolar formation and developmental potential in the early embryo.
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Affiliation(s)
- Ramya Potabattula
- Institute of Human Genetics Julius Maximilians University Würzburg Germany
| | - Federica Zacchini
- Malopolska Centre of Biotechnology Jagiellonian University Krakow Poland
- Percuros B.V. Leiden The Netherlands
| | - Grazyna Ewa Ptak
- Malopolska Centre of Biotechnology Jagiellonian University Krakow Poland
| | - Marcus Dittrich
- Institute of Human Genetics Julius Maximilians University Würzburg Germany
- Department of Bioinformatics Julius Maximilians University Würzburg Germany
| | - Tobias Müller
- Department of Bioinformatics Julius Maximilians University Würzburg Germany
| | - Nady El Hajj
- Institute of Human Genetics Julius Maximilians University Würzburg Germany
- College of Health and Life Sciences Hamad Bin Khalifa University Doha Qatar
| | | | - Charis Drummer
- Platform Degenerative Diseases Leibniz Institute for Primate Research Göttingen Germany
- German Center for Cardiovascular Research, Partner Site Göttingen Göttingen Germany
| | - Rüdiger Behr
- Platform Degenerative Diseases Leibniz Institute for Primate Research Göttingen Germany
- German Center for Cardiovascular Research, Partner Site Göttingen Göttingen Germany
| | - Andrea Lucas‐Hahn
- Institute of Farm Animal Genetics Friedrich‐Loeffler‐Institute Mariensee/Neustadt Germany
| | - Heiner Niemann
- Clinic for Gastroenterology, Hepatology and Endocrinology Medical University Hannover Hannover Germany
| | | | - Thomas Haaf
- Institute of Human Genetics Julius Maximilians University Würzburg Germany
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Potabattula R, Dittrich M, Schorsch M, Hahn T, Haaf T, El Hajj N. Male obesity effects on sperm and next-generation cord blood DNA methylation. PLoS One 2019; 14:e0218615. [PMID: 31246962 PMCID: PMC6597061 DOI: 10.1371/journal.pone.0218615] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 06/05/2019] [Indexed: 12/20/2022] Open
Abstract
The prevalence of metabolic disorders, in particular obesity has dramatically increased worldwide. Genetic variants explain only a minor part of the obesity epidemic induced by physical inactivity and over-nutrition. Epidemiological studies in humans and animal models indicate that epigenetic changes associated with adverse parental and/or intrauterine factors may contribute to the missing heritability of metabolic disorders. Possible adverse paternal effects are likely transmitted by sperm to the next-generation. To investigate this hypothesis, we have systematically analyzed the effects of male body mass index (BMI) on sperm epigenome and its association with next-generation fetal cord blood (FCB) DNA methylation. Methylation levels of maternally imprinted (PEG1, PEG4, PEG5, and PEG10), paternally imprinted (H19-IG DMR, IGF2-DMR0, and MEG3-IG DMR) regions, and obesity-related non-imprinted HIF3A gene were quantified by bisulphite pyrosequencing in sperm samples of 294 human donors undergoing in vitro fertilization or intracytoplasmic sperm injection, and in 113 FCBs of the resulting offspring. Multivariable regression analyses revealed that MEG3 intergenic differentially methylated region (IG DMR) showed positive correlation between sperm methylation and donor’s BMI. A gender-specific correlation between paternal BMI and FCB methylation was observed for MEG3-IG DMR, HIF3A, and IGF2-DMR0. The former two genes displayed same directional nominal association (as sperm) between paternal BMI and FCB methylation in male offspring. Hypomethylation of IGF2-DMR0 with increased paternal BMI was observed in FCBs from female offsprings. Our results suggest that male obesity is nominally associated with modification of sperm DNA methylome in humans, which may affect the epigenome of the next-generation. Nevertheless, it is important to note that none of the associated p-values survived multiple testing adjustments. Future work should test the effect of associated methylation aberrations in the offspring as DNA methylation was shown to control expression and/or imprint establishment across the studied genes.
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Affiliation(s)
- Ramya Potabattula
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
- * E-mail: (RP); , (NEH)
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | | | | | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
- College of Health and Life Sciences, Hamad Bin Khalifa University, Education City, Doha, Qatar
- * E-mail: (RP); , (NEH)
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Gomez R, Schorsch M, Gerhold-Ay A, Hasenburg A, Seufert R, Skala C. Fertility After Ovarian Cystectomy: How Does Surgery Affect IVF/ICSI Outcomes? Geburtshilfe Frauenheilkd 2019; 79:72-78. [PMID: 30686836 PMCID: PMC6336490 DOI: 10.1055/a-0767-6722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 02/09/2018] [Revised: 09/20/2018] [Accepted: 10/19/2018] [Indexed: 12/12/2022] Open
Abstract
Introduction
For patients considering undergoing assisted reproductive techniques (ART), many concerns arise when persistent ovarian cysts are found. This large study aimed to determine how ovarian cyst removal affects success rates of IVF/ICSI therapies.
Methods
550 patients who underwent an IVF/ICSI treatment between 2002 and 2011 with a persistent ovarian cyst ≤ 5 cm before treatment were analyzed retrospectively. 328 patientsʼ preference was to undergo a laparoscopic cystectomy and 222 patients opted for a conservative management. Control subjects included 13 552 patients undergoing IVF/ICSI at the same period of time without an ovarian cyst.
Results
After adjusting for age, patients with ovarian cysts without surgery needed a significant higher stimulation dose than the control group (2576.4 vs. 2207.5 IU, p < 0.001). However, on average, they had 1.13 (− 0.25 – 2.01) higher oocyte number retrieved compared to the operated patients (9.0 ± 5.5 vs. 8.2 ± 5.0) (p = 0.012). Patients after surgical cyst removal had a significant lower number of oocytes retrieved (MNOR) in comparison to the control group (8.2 ± 5.0 vs. 9.5 ± 5.4) (p = 0.00). Compared to controls, operated patients had similar clinical pregnancy rate (CPR) (34.2 vs. 33.5%) OR 1.031 (95% CI 0.817 – 1.302) (p = 0.815). Compared to controls, patients without surgery showed significant lower pregnancy rate (34.2 vs. 25,7%) OR 1.428 (95% CI 1.054 – 1.936) (p = 0.002) and lower live birth rate (LBR) (21.9 vs. 13.5%) OR 1.685 (95% CI 1.143 – 2.485) (p = 0.008).
Conclusions
Ovarian cystectomy did not negatively impact the pregnancy rate or the live birth rate compared to controls.
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Affiliation(s)
- Ruth Gomez
- Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Klinik und Poliklinik für Geburtshilfe und Frauengesundheit, Mainz, Germany
| | | | - Aslihan Gerhold-Ay
- IMBEI-Institut für Medizinische Biometrie, Epidemiologie und Informatik, Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Mainz, Germany
| | - Annette Hasenburg
- Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Klinik und Poliklinik für Geburtshilfe und Frauengesundheit, Mainz, Germany
| | - Rudolf Seufert
- Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Klinik und Poliklinik für Geburtshilfe und Frauengesundheit, Mainz, Germany
| | - Christine Skala
- Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Klinik und Poliklinik für Geburtshilfe und Frauengesundheit, Mainz, Germany
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Potabattula R, Dittrich M, Böck J, Haertle L, Müller T, Hahn T, Schorsch M, Hajj NE, Haaf T. Allele-specific methylation of imprinted genes in fetal cord blood is influenced by cis-acting genetic variants and parental factors. Epigenomics 2018; 10:1315-1326. [PMID: 30238782 PMCID: PMC6240887 DOI: 10.2217/epi-2018-0059] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Aim: To examine the effects of genetic variation, parental age and BMI on parental allele-specific methylation of imprinted genes in fetal cord blood samples. Methodology: We have developed SNP genotyping and deep bisulphite sequencing assays for six imprinted genes to determine parental allele-specific methylation patterns in diploid somatic tissues. Results: Multivariate linear regression analyses revealed a negative correlation of paternal age with paternal MEG3 allele methylation in fetal cord blood. Methylation of the maternal PEG3 allele showed a positive correlation with maternal age. Paternal BMI was positively correlated with paternal MEST allele methylation. In addition to parental origin, allele-specific methylation of most imprinted genes was largely dependent on the underlying SNP haplotype. Conclusion: Our study supports the idea that parental factors can have an impact, although of small effect size, on the epigenome of the next generation, providing an additional layer of complexity to phenotypic diversity.
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Affiliation(s)
- Ramya Potabattula
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany.,Department of Bioinformatics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Julia Böck
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Larissa Haertle
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Tobias Müller
- Department of Bioinformatics, Julius Maximilians University, 97074 Würzburg, Germany
| | | | | | - Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
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El Hajj N, Haertle L, Dittrich M, Denk S, Lehnen H, Hahn T, Schorsch M, Haaf T. DNA methylation signatures in cord blood of ICSI children. Hum Reprod 2018; 32:1761-1769. [PMID: 28575352 PMCID: PMC5850272 DOI: 10.1093/humrep/dex209] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 05/15/2017] [Indexed: 12/12/2022] Open
Abstract
STUDY QUESTION Does ICSI induce specific DNA methylation changes in the resulting offspring? SUMMARY ANSWER Although several thousand analyzed CpG sites (throughout the genome) displayed significant between-group methylation differences, both ICSI and spontaneously conceived children varied within the normal range of methylation variation. WHAT IS KNOWN ALREADY Children conceived by ART have increased risks for medical problems at birth and to the extent of present knowledge also in later life (i.e. impaired metabolic and cardiovascular functions). One plausible mechanism mediating these ART effects are epigenetic changes originating in the germ cells and/or early embryos and persisting during further development. STUDY DESIGN, SIZE, DURATION We compared the cord blood methylomes and candidate gene methylation patterns of newborns conceived through ICSI or spontaneously. PARTICIPANTS/MATERIALS, SETTING, METHODS Umbilical cord bloods were obtained from healthy newborn singletons conceived spontaneously (53 samples), through ICSI (89) or IVF (34). Bisulfite-converted DNA samples of 48 ICSI and 46 control pregnancies were used for genome-wide analyses with Illumina's 450K methylation arrays. Candidate genes from the methylation screen were analyzed in all three groups by bisulfite pyrosequencing. MAIN RESULTS AND THE ROLE OF CHANCE Altogether, 4730 (0.11%) of 428 227 analyzed CpG sites exhibited significant between-group methylation differences, but all with small (β < 10%) or very small (β < 1%) effect size. ICSI children showed a significantly decreased DNA methylation age at birth, lagging approximately half a week behind the controls. ART-susceptible CpGs were enriched in CpG islands with low methylation values (0-20%) and in imprinting control regions (ICRs). Eighteen promoter regions (six in microRNA and SNORD RNA genes), four CpG islands (three in genes including one long non-coding RNA), and two ICRs contained multiple significant sites. Three differentially methylated regions were studied in more detail by bisulfite pyrosequencing. ATG4C and SNORD114-9 could be validated in an independent ICSI group, following adjustment for maternal age and other confounding factors. ATG4C was also significant in the IVF group. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION The observed epigenetic effects are small and there are numerous potential confounding factors such as parental age and infertility. Although our study meets current standards for epigenetic screens, sample size is still two orders of magnitude below that of genome-wide association studies. WIDER IMPLICATIONS OF THE FINDINGS Our study suggests an impact of ICSI on the offspring's epigenome(s), which may contribute to phenotypic variation and disease susceptibility in ART children. Epigenetic regulation of gene expression by different classes of non-coding RNAs may be a key mechanism for developmental programming through ART. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by a research grant (no. 692185) from the European Union (ERA of ART). There are no competing interests.
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Affiliation(s)
- Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Larissa Haertle
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany.,Department of Bioinformatics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Sarah Denk
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
| | - Harald Lehnen
- Department of Gynecology and Obstetrics, Municipal Clinics, Hubertusstrasse 100, 41239 Mönchengladbach, Germany
| | - Thomas Hahn
- Fertility Center, Mainzer Strasse 98-102, 65189 Wiesbaden, Germany
| | - Martin Schorsch
- Fertility Center, Mainzer Strasse 98-102, 65189 Wiesbaden, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, 97074 Würzburg, Germany
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Haertle L, Maierhofer A, Böck J, Lehnen H, Böttcher Y, Blüher M, Schorsch M, Potabattula R, El Hajj N, Appenzeller S, Haaf T. Hypermethylation of the non-imprinted maternal MEG3 and paternal MEST alleles is highly variable among normal individuals. PLoS One 2017; 12:e0184030. [PMID: 28854270 PMCID: PMC5576652 DOI: 10.1371/journal.pone.0184030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 08/16/2017] [Indexed: 01/09/2023] Open
Abstract
Imprinted genes show parent-specific activity (functional haploidy), which makes them particularly vulnerable to epigenetic dysregulation. Here we studied the methylation profiles of oppositely imprinted genes at single DNA molecule resolution by two independent parental allele-specific deep bisulfite sequencing (DBS) techniques. Using Roche (GSJunior) next generation sequencing technology, we analyzed the maternally imprinted MEST promoter and the paternally imprinted MEG3 intergenic (IG) differentially methylated region (DMR) in fetal cord blood, adult blood, and visceral adipose tissue. Epimutations were defined as paternal or maternal alleles with >50% aberrantly (de)methylated CpG sites, showing the wrong methylation imprint. The epimutation rates (range 2–66%) of the paternal MEST and the maternal MEG3 IG DMR allele, which should be completely unmethylated, were significantly higher than those (0–15%) of the maternal MEST and paternal MEG3 alleles, which are expected to be fully methylated. This hypermethylation of the non-imprinted allele (HNA) was independent of parental origin. Very low epimutation rates in sperm suggest that HNA occurred after fertilization. DBS with Illumina (MiSeq) technology confirmed HNA for the MEST promoter and the MEG3 IG DMR, and to a lesser extent, for the paternally imprinted secondary MEG3 promoter and the maternally imprinted PEG3 promoter. HNA leads to biallelic methylation of imprinted genes in a considerable proportion of normal body cells (somatic mosaicism) and is highly variable between individuals. We propose that during development and differentiation maintenance of differential methylation at most imprinting control regions may become to some extent redundant. The accumulation of stochastic and environmentally-induced methylation errors on the non-imprinted allele may increase epigenetic diversity between cells and individuals.
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Affiliation(s)
- Larissa Haertle
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Anna Maierhofer
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Julia Böck
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Harald Lehnen
- Department of Gynecology and Obstetrics, Municipal Clinics, Mönchengladbach, Germany
| | - Yvonne Böttcher
- Integrated Research and Treatment Center (IFB) Adiposity Diseases, Leipzig, Germany
- Institute of Clinical Medicine, University of Oslo, Lørenskog, Norway
| | - Matthias Blüher
- Integrated Research and Treatment Center (IFB) Adiposity Diseases, Leipzig, Germany
| | | | - Ramya Potabattula
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Nady El Hajj
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
| | - Silke Appenzeller
- Core Unit Systems Medicine, Julius Maximilians University, Würzburg, Germany
- Comprehensive Cancer Center Mainfranken, Julius Maximilians University, Würzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany
- * E-mail:
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Atsem S, Reichenbach J, Potabattula R, Dittrich M, Nava C, Depienne C, Böhm L, Rost S, Hahn T, Schorsch M, Haaf T, El Hajj N. Paternal age effects on sperm FOXK1 and KCNA7 methylation and transmission into the next generation. Hum Mol Genet 2016; 25:4996-5005. [PMID: 28171595 PMCID: PMC5418740 DOI: 10.1093/hmg/ddw328] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/16/2016] [Accepted: 09/21/2016] [Indexed: 01/27/2023] Open
Abstract
Children of older fathers carry an increased risk for developing autism and other disorders. To elucidate the underlying mechanisms, we investigated the correlation of sperm DNA methylation with paternal age and its impact on the epigenome of the offspring. Methylation levels of nine candidate genes and LINE-1 repeats were quantified by bisulfite pyrosequencing in sperm DNA of 162 donors and 191 cord blood samples of resulting children (conceived by IVF/ICSI with the same sperm samples). Four genes showed a significant negative correlation between sperm methylation and paternal age. For FOXK1 and KCNA7, the age effect on the sperm epigenome was replicated in an independent cohort of 188 sperm samples. For FOXK1, paternal age also significantly correlated with foetal cord blood (FCB) methylation. Deep bisulfite sequencing and allele-specific pyrosequencing allowed us to distinguish between maternal and paternal alleles in FCB samples with an informative SNP. FCB methylation of the paternal FOXK1 allele was negatively correlated with paternal age, whereas maternal allele was unaffected by maternal age. Since FOXK1 duplication has been associated with autism, we studied blood FOXK1 methylation in 74 children with autism and 41 age-matched controls. The FOXK1 promoter showed a trend for accelerated demethylation in the autism group. Dual luciferase reporter assay revealed that FOXK1 methylation influences gene expression. Collectively, our study demonstrates that age-related DNA methylation changes in sperm can be transmitted to the next generation and may contribute to the increased disease risk in offspring of older fathers.
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Affiliation(s)
- Stefanie Atsem
- Institute of Human Genetics, Julius-Maximilians University, Würzburg, Germany
| | - Juliane Reichenbach
- Institute of Human Genetics, Julius-Maximilians University, Würzburg, Germany
| | - Ramya Potabattula
- Institute of Human Genetics, Julius-Maximilians University, Würzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius-Maximilians University, Würzburg, Germany
| | - Caroline Nava
- INSERM, U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - Christel Depienne
- INSERM, U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ Paris, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
- Département de Médicine translationnelle et Neurogénétique, IGBMC, CNRS UMR 7104/INSERM U964/Université de Strasbourg, Illkirch, France
| | - Lena Böhm
- Institute of Human Genetics, Julius-Maximilians University, Würzburg, Germany
| | - Simone Rost
- Institute of Human Genetics, Julius-Maximilians University, Würzburg, Germany
| | | | | | - Thomas Haaf
- Institute of Human Genetics, Julius-Maximilians University, Würzburg, Germany
| | - Nady El Hajj
- Institute of Human Genetics, Julius-Maximilians University, Würzburg, Germany
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Bartels C, Gomez R, Schorsch M, Seufert R. Der prädiktive Wert des Time-lapse Imaging Systems für den Ausgang der In-vitro Fertilisation. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1593083] [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: 10/20/2022] Open
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12
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Kuhtz J, Schneider E, El Hajj N, Zimmermann L, Fust O, Linek B, Seufert R, Hahn T, Schorsch M, Haaf T. Epigenetic heterogeneity of developmentally important genes in human sperm: implications for assisted reproduction outcome. Epigenetics 2015; 9:1648-58. [PMID: 25625849 PMCID: PMC4622742 DOI: 10.4161/15592294.2014.988063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The molecular basis of male infertility is poorly understood, the majority of cases remaining unsolved. The association of aberrant sperm DNA methylation patterns and compromised semen parameters suggests that disturbances in male germline epigenetic reprogramming contribute to this problem. So far there are only few data on the epigenetic heterogeneity of sperm within a given sample and how to select the best sperm for successful infertility treatment. Limiting dilution bisulfite sequencing of small pools of sperm from fertile donors did not reveal significant differences in the occurrence of abnormal methylation imprints between sperm with and without morphological abnormalities. Intracytoplasmic morphologically selected sperm injection was not associated with an improved epigenetic quality, compared to standard intracytoplasmatic sperm injection. Deep bisulfite sequencing (DBS) of 2 imprinted and 2 pluripotency genes in sperm from men attending a fertility center showed that in both samples with normozoospermia and oligoasthenoteratozoospermia (OAT) the vast majority of sperm alleles was normally (de)methylated and the percentage of epimutations (allele methylation errors) was generally low (<1%). However, DBS allowed one to identify and quantify these rare epimutations with high accuracy. Sperm samples not leading to a pregnancy, in particular in the OAT group, had significantly more epimutations in the paternally methylated GTL2 gene than samples leading to a live birth. All 13 normozoospermic and 13 OAT samples leading to a child had <1% GTL2 epimutations, whereas one (7%) of 14 normozoospermic and 7 (50%) of 14 OAT samples without pregnancy displayed 1–14% GTL2 epimutations.
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Affiliation(s)
- Juliane Kuhtz
- a Institute of Human Genetics ; Julius Maximilians University ; Würzburg , Germany
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Vieweg M, Dvorakova-Hortova K, Dudkova B, Waliszewski P, Otte M, Oels B, Hajimohammad A, Turley H, Schorsch M, Schuppe HC, Weidner W, Steger K, Paradowska-Dogan A. Methylation analysis of histone H4K12ac-associated promoters in sperm of healthy donors and subfertile patients. Clin Epigenetics 2015; 7:31. [PMID: 25806092 PMCID: PMC4372182 DOI: 10.1186/s13148-015-0058-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 02/12/2015] [Indexed: 11/24/2022] Open
Abstract
Background Histone to protamine exchange and the hyperacetylation of the remaining histones are hallmarks of spermiogenesis. Acetylation of histone H4 at lysine 12 (H4K12ac) was observed prior to full decondensation of sperm chromatin after fertilization suggesting an important role for the regulation of gene expression in early embryogenesis. Similarly, DNA methylation may contribute to gene silencing of several developmentally important genes. Following the identification of H4K12ac-binding promoters in sperm of fertile and subfertile patients, we aimed to investigate whether the depletion of histone-binding is associated with aberrant DNA methylation in sperm of subfertile men. Furthermore, we monitored the transmission of H4K12ac, 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) from the paternal chromatin to the embryo applying mouse in vitro fertilization and immunofluorescence. Results Chromatin immunoprecipitation (ChIP) with anti-H4K12ac antibody was performed with chromatin isolated from spermatozoa of subfertile patients with impaired sperm chromatin condensation assessed by aniline blue staining. Fertile donors were used as control. DNA methylation analysis of selected H4K12ac-interacting promoters in spermatozoa was performed by pyrosequencing. Depletion of binding sites for H4K12ac was observed within the following developmentally important promoters: AFF4, EP300, LRP5, RUVBL1, USP9X, NCOA6, NSD1, and POU2F1. We found 5% to 10% hypomethylation within CpG islands of selected promoters in the sperm of fertile donors, and it was not significantly altered in the subfertile group. Our results demonstrate that the H4K12ac depletion in selected developmentally important promoters of subfertile patients was not accompanied by a change of DNA methylation. Using a murine model, immunofluorescence revealed that H4K12ac co-localize with 5mC in the sperm nucleus. During fertilization, when the pronuclei are formed, the paternal pronucleus exhibits a strong acetylation signal on H4K12, while in the maternal pronucleus, there is a permanent increase of H4K12ac until pronuclei fusion. Simultaneously, there is an increase of the 5hmC signal and a decrease of the 5mC signal. Conclusions We suggest that aberrant histone acetylation within developmentally important gene promoters in subfertile men, but not DNA methylation, may reflect insufficient sperm chromatin compaction affecting the transfer of epigenetic marks to the oocyte. Electronic supplementary material The online version of this article (doi:10.1186/s13148-015-0058-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Markus Vieweg
- Section Molecular Andrology, Biomedical Research Center Seltersberg, Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Katerina Dvorakova-Hortova
- Laboratory of Reproductive Biology, Institute of Biotechnology AS CR, v.v.i., Videnska 1083, 14220 Prague 4, Czech Republic.,Biocev Group, Department of Zoology, Faculty of Science, Charles University in Prague, 12844 Prague, Czech Republic
| | - Barbora Dudkova
- Biocev Group, Department of Zoology, Faculty of Science, Charles University in Prague, 12844 Prague, Czech Republic
| | - Przemyslaw Waliszewski
- Department of Urology, Pediatric Urology and Andrology, Justus Liebieg University of Giessen, 35392 Giessen, Germany
| | - Marie Otte
- Fertility Center, 35578 Wetzlar, Germany
| | | | | | | | | | - Hans-Christian Schuppe
- Department of Urology, Pediatric Urology and Andrology, Justus Liebieg University of Giessen, 35392 Giessen, Germany
| | - Wolfgang Weidner
- Department of Urology, Pediatric Urology and Andrology, Justus Liebieg University of Giessen, 35392 Giessen, Germany
| | - Klaus Steger
- Section Molecular Andrology, Biomedical Research Center Seltersberg, Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Agnieszka Paradowska-Dogan
- Section Molecular Andrology, Biomedical Research Center Seltersberg, Justus Liebig University of Giessen, 35392 Giessen, Germany
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Gomez R, Schorsch M, Hahn T, Henke A, Hoffmann I, Seufert R, Skala C. The influence of AMH on IVF/ICSI success. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1387989] [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: 10/24/2022] Open
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15
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Bockmeyer K, Gomez R, Görg MC, Schorsch M, Seufert R. Konzeptionsmodus bei höhergradigen Mehrlingen; Erfahrungen aus 30 Jahren an der Frauenklinik Mainz. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388003] [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: 10/24/2022] Open
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16
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Linek B, Turley H, Schorsch M, Seufert R. Das endokrine Sekretionsverhalten humaner Granulosazellen nach r-FSH und r-FSH/LH-Stimulation bei Kinderwunschpatientinnen über 35 Jahren. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388005] [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: 10/24/2022] Open
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17
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Schütte B, El Hajj N, Kuhtz J, Nanda I, Gromoll J, Hahn T, Dittrich M, Schorsch M, Müller T, Haaf T. Broad DNA methylation changes of spermatogenesis, inflammation and immune response-related genes in a subgroup of sperm samples for assisted reproduction. Andrology 2013; 1:822-9. [PMID: 23996961 PMCID: PMC4033565 DOI: 10.1111/j.2047-2927.2013.00122.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 07/19/2013] [Accepted: 07/22/2013] [Indexed: 01/08/2023]
Abstract
Aberrant sperm DNA methylation patterns, mainly in imprinted genes, have been associated with male subfertility and oligospermia. Here, we performed a genome-wide methylation analysis in sperm samples representing a wide range of semen parameters. Sperm DNA samples of 38 males attending a fertility centre were analysed with Illumina HumanMethylation27 BeadChips, which quantify methylation of >27 000 CpG sites in cis-regulatory regions of almost 15 000 genes. In an unsupervised analysis of methylation of all analysed sites, the patient samples clustered into a major and a minor group. The major group clustered with samples from normozoospermic healthy volunteers and, thus, may more closely resemble the normal situation. When correlating the clusters with semen and clinical parameters, the sperm counts were significantly different between groups with the minor group exhibiting sperm counts in the low normal range. A linear model identified almost 3000 CpGs with significant methylation differences between groups. Functional analysis revealed a broad gain of methylation in spermatogenesis-related genes and a loss of methylation in inflammation- and immune response-related genes. Quantitative bisulfite pyrosequencing validated differential methylation in three of five significant candidate genes on the array. Collectively, we identified a subgroup of sperm samples for assisted reproduction with sperm counts in the low normal range and broad methylation changes (affecting approximately 10% of analysed CpG sites) in specific pathways, most importantly spermatogenesis-related genes. We propose that epigenetic analysis can supplement traditional semen parameters and has the potential to provide new insights into the aetiology of male subfertility.
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Affiliation(s)
- B Schütte
- Institute of Human Genetics, Julius Maximilians University, Würzburg, Germany; Department of Bioinformatics, Julius Maximilians University, Würzburg, Germany
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Schorsch M, Gomez R, Hahn T, Hoelscher-Obermaier J, Seufert R, Skala C. Success Rate of Inseminations Dependent on Maternal Age? An Analysis of 4246 Insemination Cycles. Geburtshilfe Frauenheilkd 2013; 73:808-811. [PMID: 24771935 DOI: 10.1055/s-0033-1350615] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [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: 04/04/2013] [Revised: 04/25/2013] [Accepted: 05/07/2013] [Indexed: 10/26/2022] Open
Abstract
Intrauterine insemination (IUI) has latterly become less important in reproductive medicine. The aim of this retrospective analysis was to identify and evaluate the success rates of repeated insemination cycles in women of different ages. All women who underwent intrauterine insemination in the Wiesbaden Fertility Clinic between 1998 and 2010 were included in the analysis. Additional inclusion criteria were: not more than 45 years old, previous FSH stimulation and slight to moderate subfertility of the male partner. A total of 4246 insemination cycles in 1612 patients were included in the analysis. The average number of IUI cycles per patient was 2.24 (1-14). Patient age ranged from 19 to 45 years (mean: 33.9 years). Logistic regression analysis showed a drop in pregnancy rates with increasing age (p = 0.000). However, for the first three cycles the pregnancy rates for women aged 40 and 41 did not differ from those of women aged between 35 and 39 years. Overall pregnancy rates were stable in women up to the age of 40, even after several insemination cycles (7.5 and 10 %). Insemination is therefore still an effective procedure in selected patients. Stable pregnancy rates were recorded even after more than 3 cycles. After 3 cycles, the success rates for women aged 40 and 41 did not differ from those of women below the age of 40.
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Affiliation(s)
- M Schorsch
- MVZ Kinderwunschzentrum Wiesbaden GmbH, Wiesbaden
| | - R Gomez
- Frauenklinik, Universitätsmedizin, JGU Mainz, Mainz
| | - T Hahn
- MVZ Kinderwunschzentrum Wiesbaden GmbH, Wiesbaden
| | | | - R Seufert
- Frauenklinik, Universitätsmedizin, JGU Mainz, Mainz
| | - C Skala
- Frauenklinik, Universitätsmedizin, JGU Mainz, Mainz
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Daser A, Seifert D, Konfortov B, Day E, Turley H, Immesberger A, Haaf T, Zechner U, Hahn T, Dear P, Schorsch M. O-7 Chromatid counting in polar bodies with a microfluidic system – a high throughput approach for aneuploidy screening in oocytes. Reprod Biomed Online 2013. [DOI: 10.1016/s1472-6483(13)60040-1] [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: 10/26/2022]
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Rogenhofer N, Dansranjavin T, Schorsch M, Spiess A, Wang H, Viktoria VS, Cappallo-Obermann H, Baukloh V, Yang H, Paradowska A, Chen B, Thaler C, Weidner W, Schuppe HC, Steger K. 2029 SPERM PROTAMINE MRNA RATIO AS A CLINICAL PARAMETER TO ESTIMATE THE FERTILIZING POTENTIAL OF MEN TAKING PART IN AN IVF/ICSI PROGRAM. J Urol 2013. [DOI: 10.1016/j.juro.2013.02.2448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | - Hao Yang
- Shanghai, China, People's Republic of
| | | | - Bin Chen
- Shanghai, China, People's Republic of
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Rogenhofer N, Dansranjavin T, Schorsch M, Spiess A, Wang H, von Schönfeldt V, Cappallo-Obermann H, Baukloh V, Yang H, Paradowska A, Chen B, Thaler CJ, Weidner W, Schuppe HC, Steger K. The sperm protamine mRNA ratio as a clinical parameter to estimate the fertilizing potential of men taking part in an ART programme. Hum Reprod 2013; 28:969-78. [PMID: 23340056 DOI: 10.1093/humrep/des471] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
STUDY QUESTION Could the protamine-1 to protamine-2 mRNA ratio serve as a biomarker to estimate the fertilizing capacity of sperm from men taking part in an IVF/ICSI programme? SUMMARY ANSWER The protamine mRNA ratio clearly discriminates between fertile and subfertile men and sperm with a normal protamine mRNA ratio exhibit a higher fertilizing capacity in IVF/ICSI. WHAT IS KNOWN ALREADY Aberrant sperm protamine ratios are associated with male factor infertility and mRNA ratio is comparable with protein ratio (due to transcriptional stop in elongating spermatids). STUDY DESIGN, SIZE, DURATION The study population was drawn from subfertile men, whose female partners participated in IVF or ICSI programmes between September 2010 and February 2012. Normozoospermic healthy volunteers served as controls. Sperm cells were lysed, mRNA extracted, reverse transcribed and subjected to real-time quantitative PCR using specific primer pairs for protamine-1 and protamine-2. Relative protamine-1 and protamine-2 mRNA levels were analysed with the Mann-Whitney U-test (two-tailed). PARTICIPANTS/MATERIALS, SETTING, METHODS Quantitative RT-PCR for protamines 1 and 2 has been performed in ejaculates from 32 normozoospermic volunteers (control, University Clinic Giessen, Germany) and 306 patients, whose female partners took part in an IVF (n = 76; University Clinic Hamburg, Germany and Shanghai Jiaotong University, China) or an ICSI (n = 230; University Clinic Munich, Germany and Kinderwunschzentrum Wiesbaden, Germany) programme. MAIN RESULTS AND THE ROLE OF CHANCE The sperm protamine mRNA ratio in normozoospermic men (0.98 ± 0.3) differed significantly from that of ICSI patients (Munich 0.81 ± 0.1; Wiesbaden 0.78 ± 0.2; P < 0.001), while processed samples obtained from IVF patients revealed a normal protamine mRNA ratio (Hamburg 1.0 ± 0.07; Shanghai 1.0 ± 0.54). Normal protamine mRNA ratios were associated with a significantly higher total motile sperm count and a significantly higher percentage of progressively motile sperm. Sperm with a normal protamine mRNA ratio revealed a higher fertilization capacity (fc) in both IVF (53.6% of patients with fc > 80%; P = 0.017) and ICSI (65.1% of patients with fc > 70%; P = 0.028). LIMITATIONS, REASONS FOR CAUTION The protamine mRNA ratio in an individual sperm cell used for ICSI may be different from the overall value obtained from a semen aliquot. WIDER IMPLICATIONS OF THE FINDINGS Data are in line with current literature and suggest the protamine mRNA ratio as a diagnostic marker to estimate the fertilizing capacity of sperm. STUDY FUNDING The German Research Foundation (DFG) to K.S., W.W. and A.P. (STE 892/9-2), as well as to A.S. and H.C.O. (SP721/1-3). COMPETING INTEREST(S) None.
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Affiliation(s)
- Nina Rogenhofer
- Division of Gynecological Endocrinology and Reproductive Medicine, Department of Gynecology and Obstetrics, Klinikum der Ludwig-Maximilians-Universität, Campus Grosshadern, Munich, Germany
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Daser A, Day E, Konfortov B, Turley H, Immesberger A, Haaf T, Zechner U, Hahn T, Dear P, Schorsch M. P12 Direct counting of chromatids in polar bodies with digital PCR – a new method for aneuploidy screening in oocytes. Reprod Biomed Online 2012. [DOI: 10.1016/s1472-6483(12)60229-6] [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: 11/29/2022]
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Abstract
Antiphospholipid syndrome (APS) is defined as an autoimmune disorder characterized by recurrent thrombosis or obstetrical morbidity. These features are linked to the presence in blood of autoantibodies against negatively charged phospholipids or phospholipid-binding proteins. Obstetric morbidity includes recurrent abortion (early and late) and severe pre-eclampsia (P-EC)/hemolysis, elevated liver enzymes, low platelets (HELLP) syndrome, and/or severe placental insufficiency. Criteria that define the major clinical and laboratory events were published in revised forms in the Sydney recommendations in 2006. We analyzed the blood of patients with severe P-EC according to the subgroups based on the 2006 revised criteria definition and compared these results with women after uncomplicated pregnancy and delivery. We found 20% elevated antiphospholipid antibodies (APAs) in women with severe P-EC (group I, 7.5%; group IIa, 5.0%; group IIb, 5.0%; group IIc, 2.5%). The increased APAs were observed only in women with severe P-EC (odds ratio: 2.45; 95% confidence interval, 1.01 to 4.3) and not in patients with severe P-EC at >34 weeks of gestation. According to our retrospective observation, we recommend the determination of anticardiolipin antibodies, lupus anticoagulant, and β-2 glycoprotein-1 antibodies in patients with severe P-EC at <34 weeks of gestation.
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Acar-Perk B, Weimer J, Koch K, Salmassi A, Arnold N, Mettler L, Schmutzler AG, Ottolini CS, Griffin DK, Handyside AH, Summers MC, Thornhill AR, Montjean D, Benkhalifa M, Cohen-Bacrie P, Siffroi JP, Mandelbaum J, Berthaut I, Bashamboo A, Ravel C, McElreavey K, Ao A, Zhang XY, Yilmaz A, Chung JT, Demirtas E, Son WY, Dahan M, Buckett W, Holzer H, Tan SL, Perheentupa A, Vierula M, Jorgensen N, Skakkebaek NE, Chantot-Bastaraud S, McElreavey K, Toppari J, Muzii L, Magli MC, Gioia L, Mattioli M, Ferraretti AP, Gianaroli L, Koscinski I, Elinati E, Fossard C, Kuentz P, Kilani Z, Demirol A, Gurgan T, Schmitt F, Velez de la Calle J, Iqbal N, Louanjli N, Pasquier M, Carre-Pigeon F, Muller J, Barratt C, Viville S, Magli C, Grugnetti C, Castelletti E, Paviglianiti B, Gianaroli L, Pepas L, Braude P, Grace J, Bolton V, Khalaf Y, El-Toukhy T, Galeraud-Denis I, Bouraima H, Sibert L, Rives N, Carreau S, Janse F, de With LM, Fauser BCJM, Lambalk CB, Laven JSE, Goverde AJ, Giltay JC, De Leo V, Governini L, Quagliariello A, Margollicci MA, Piomboni P, Luddi A, Miyamura H, Nishizawa H, Ota S, Suzuki M, Inagaki A, Egusa H, Nishiyama S, Kato T, Nakanishi I, Fujita T, Imayoshi Y, Markoff A, Yanagihara I, Udagawa Y, Kurahashi H, Alvaro Mercadal B, Imbert R, Demeestere I, De Leener A, Englert Y, Costagliola S, Delbaere A, Velilla E, Colomar A, Toro E, Chamosa S, Alvarez J, Lopez-Teijon M, Fernandez S, Hosoda Y, Hasegawa A, Morimoto N, Wakimoto Y, Ito Y, Komori S, Sati L, Zeiss C, Demir R, McGrath J, Ku SY, Kim YJ, Kim YY, Kim HJ, Park KE, Kim SH, Choi YM, Moon SY, Minor A, Chow V, Ma S, Martinez Mendez E, Gaytan M, Linan A, Pacheco A, San Celestino M, Nogales C, Ariza M, Cernuda D, Bronet F, Lendinez Ramirez AM, Palomares AR, Perez-Nevot B, Urraca V, Ruiz Martin A, Reche A, Ruiz Galdon M, Reyes-Engel A, Treff NR, Tao X, Taylor D, Levy B, Ferry KM, Scott Jr. RT, Vasan S, Acharya KK, Vasan B, Yalaburgi R, Ganesan KK, Darshan SC, Neelima CH, Deepa P, Akhilesh B, Sravanthi D, Sreelakshmi KS, Deepti H, van Doorninck JH, Eleveld C, van der Hoeven M, Birnie E, Steegers EAP, Galjaard RJ, Laven JSE, van den Berg IM, Fiorentino F, Spizzichino L, Bono S, Biricik A, Kokkali G, Rienzi L, Ubaldi FM, Iammarrone E, Gordon A, Pantos K, Oitmaa E, Tammiste A, Suvi S, Punab M, Remm M, Metspalu A, Salumets A, Rodrigo L, Mir P, Cervero A, Mateu E, Mercader A, Vidal C, Giles J, Remohi J, Pellicer A, Martin J, Rubio C, Mozdarani H, Moghbeli Nejad S, Behmanesh M, Alleyasin A, Ghedir H, Ibala-Romdhane S, Mamai O, Brahem S, Elghezal H, Ajina M, Gribaa M, Saad A, Mateu E, Rodrigo L, Martinez MC, Mercader A, Peinado V, Milan M, Al-Asmar N, Pellicer A, Remohi J, Rubio C, Mercader A, Buendia P, Delgado A, Escrich L, Amorocho B, Simon C, Remohi J, Pellicer A, Martin J, Rubio C, Petrussa L, Van de Velde H, De Munck N, De Rycke M, Altmae S, Martinez-Conejero JA, Esteban FJ, Ruiz-Alonso M, Stavreus-Evers A, Horcajadas JA, Salumets A, Bug B, Raabe-Meyer G, Bender U, Zimmer J, Schulze B, Vogt PH, Laisk T, Peters M, Salumets A, Grabar V, Feskov A, Zhilkova E, Sugawara N, Maeda M, Seki T, Manome T, Nagai R, Araki Y, Georgiou I, Lazaros L, Xita N, Chatzikyriakidou A, Kaponis A, Grigoriadis N, Hatzi E, Grigoriadis I, Sofikitis N, Zikopoulos K, Gunn M, Brezina PR, Benner A, Du L, Kearns WG, Shen X, Zhou C, Xu Y, Zhong Y, Zeng Y, Zhuang G, Benner A, Brezina PR, Gunn MC, Du L, Richter K, Kearns WG, Andreeva P, Dimitrov I, Konovalova M, Kyurkchiev S, Shterev A, Daser A, Day E, Turley H, Immesberger A, Haaf T, Hahn T, Dear PH, Schorsch M, Don J, Golan N, Eldar T, Yaverboim R. POSTER VIEWING SESSION - REPRODUCTIVE (EPI) GENETICS. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.89] [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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El Hajj N, Zechner U, Schneider E, Tresch A, Gromoll J, Hahn T, Schorsch M, Haaf T. Methylation Status of Imprinted Genes and Repetitive Elements in Sperm DNA from Infertile Males. Sex Dev 2011; 5:60-9. [DOI: 10.1159/000323806] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/13/2010] [Indexed: 01/19/2023] Open
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Schneider E, Pliushch G, El Hajj N, Galetzka D, Puhl A, Schorsch M, Frauenknecht K, Riepert T, Tresch A, Müller AM, Coerdt W, Zechner U, Haaf T. Spatial, temporal and interindividual epigenetic variation of functionally important DNA methylation patterns. Nucleic Acids Res 2010; 38:3880-90. [PMID: 20194112 PMCID: PMC2896520 DOI: 10.1093/nar/gkq126] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
DNA methylation is an epigenetic modification that plays an important role in gene regulation. It can be influenced by stochastic events, environmental factors and developmental programs. However, little is known about the natural variation of gene-specific methylation patterns. In this study, we performed quantitative methylation analyses of six differentially methylated imprinted genes (H19, MEG3, LIT1, NESP55, PEG3 and SNRPN), one hypermethylated pluripotency gene (OCT4) and one hypomethylated tumor suppressor gene (APC) in chorionic villus, fetal and adult cortex, and adult blood samples. Both average methylation level and range of methylation variation depended on the gene locus, tissue type and/or developmental stage. We found considerable variability of functionally important methylation patterns among unrelated healthy individuals and a trend toward more similar methylation levels in monozygotic twins than in dizygotic twins. Imprinted genes showed relatively little methylation changes associated with aging in individuals who are >25 years. The relative differences in methylation among neighboring CpGs in the generally hypomethylated APC promoter may not only reflect stochastic fluctuations but also depend on the tissue type. Our results are consistent with the view that most methylation variation may arise after fertilization, leading to epigenetic mosaicism.
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Affiliation(s)
- Eberhard Schneider
- Institute of Human Genetics, Julius Maximilians University, Biozentrum, Am Hubland, 97074 Wuerzburg, Germany
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Haaf T, Tresch A, Lambrecht A, Grossmann B, Schwaab E, Khanaga O, Hahn T, Schorsch M. Outcome of intracytoplasmic sperm injection with and without polar body diagnosis of oocytes. Fertil Steril 2010; 93:405-15. [DOI: 10.1016/j.fertnstert.2009.02.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2008] [Revised: 01/19/2009] [Accepted: 02/20/2009] [Indexed: 11/16/2022]
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Heilmann L, Schorsch M, Hahn T. CD3-CD56+CD16+ natural killer cells and improvement of pregnancy outcome in IVF/ICSI failure after additional IVIG-treatment. Am J Reprod Immunol 2010; 63:263-5. [PMID: 20064143 DOI: 10.1111/j.1600-0897.2009.00790.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PROBLEM The purpose of this retrospective, observational study was to investigate whether additional treatment with intravenous immunoglobulin (IVIG) increased the rate of successful pregnancies after repeated implantation failure (RIF). The retrospective data were compared with data of patients without IVIG-therapy from the meta-analysis of Clark et al. METHOD OF STUDY A total of 188 women with 226 treatment cycles between 2007 and 2009 were evaluated for IVIG therapy. The percentage of NK cells was measured two times before a new embryo transfer (only women with NK cell percentages >12% were included) and after embryo transfer at a positive pregnancy test. RESULTS In comparison with the meta-analysis of Clark et al., we observed a pregnancy rate of 50.5%, an implantation rate of 21% and a miscarriage rate of 16.8%. In 42%/IVIG- patient or 34.9%/embryo transfer, we observed a live born baby. The live born rate per embryo was 16.6%. In accordance with the study of Kwak et al., we indicate a decrease in the NK cells in patients with improved pregnancy outcome. CONCLUSION In a subgroup of RIF-patients with high level of CD56(+) CD16(+) NK-cells the additional application of IVIG leads to a favourable pregnancy outcome.
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Affiliation(s)
- Lothar Heilmann
- Institute of Reproduction, Mainzer Strasse, Mainzer Strasse 98-102, Wiesbaden, Germany.
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Haaf T, Hahn A, Lambrecht A, Grossmann B, Schwaab E, Khanaga O, Hahn T, Tresch A, Schorsch M. A high oocyte yield for intracytoplasmic sperm injection treatment is associated with an increased chromosome error rate. Fertil Steril 2008; 91:733-8. [PMID: 18314124 DOI: 10.1016/j.fertnstert.2008.01.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2007] [Revised: 01/02/2008] [Accepted: 01/03/2008] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To compare the chromosome error rate among oocytes from stimulated ovaries after retrieval of 1-5 oocytes, 6-10 oocytes, and >10 oocytes. DESIGN Retrospective cohort study. SETTING A university-based human genetic institute in collaboration with a private fertility center. PATIENT(S) Nine hundred thirty-three women undergoing intracytoplasmic sperm injection (ICSI) with a poor prognosis. INTERVENTION(S) Oocyte collection with ovarian stimulation. Polar body testing of ICSI oocytes for common chromosome errors. MAIN OUTCOME MEASURE(S) Chromosome error rate in oocytes, as determined by five-color fluorescence in situ hybridization. RESULT(S) In women less than 35 years and women between 35 and 40 years undergoing the first ICSI cycle, oocytes from the high-yield group had an increased likelihood for detectable chromosome errors (50.9% and 54.6%, respectively), compared to the intermediate-yield group (34.9% and 43.8%) and the low-yield group (23.3% and 41.2%). The overall high rate (>or=50%) of chromosomally abnormal oocytes in women more than 40 years appeared to be mainly due to the maternal age effect and increased only slightly with oocyte yield. CONCLUSION(S) Oocyte yield may be considered as an indicator of ovarian response to hormone stimulation. In women up to 40 years a high yield of oocytes after superovulation is associated with an increased chromosome error rate.
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Affiliation(s)
- Thomas Haaf
- Institute for Human Genetics, Epidemiology and Informatics, Johannes Gutenberg University Mainz, Mainz, Germany.
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Grossmann B, Schwaab E, Khanaga O, Schorsch M, Hahn T, Haaf T. P▪33 Non-disjunction in meiosis II and premature centromere division are the major causes for aneuploid oocytes. Reprod Biomed Online 2005. [DOI: 10.1016/s1472-6483(11)60355-6] [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: 10/14/2022]
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Kesternich P, Jung H, Schorsch M, Fendel H. Zervikalflora und Prostaglandingehalt des Zervikalsekretes bei drohender Frühgeburt. Arch Gynecol Obstet 1989. [DOI: 10.1007/bf02417238] [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: 11/29/2022]
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