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Wyrwoll MJ, Temel ŞG, Nagirnaja L, Oud MS, Lopes AM, van der Heijden GW, Heald JS, Rotte N, Wistuba J, Wöste M, Ledig S, Krenz H, Smits RM, Carvalho F, Gonçalves J, Fietz D, Türkgenç B, Ergören MC, Çetinkaya M, Başar M, Kahraman S, McEleny K, Xavier MJ, Turner H, Pilatz A, Röpke A, Dugas M, Kliesch S, Neuhaus N, Aston KI, Conrad DF, Veltman JA, Friedrich C, Tüttelmann F. Bi-allelic Mutations in M1AP Are a Frequent Cause of Meiotic Arrest and Severely Impaired Spermatogenesis Leading to Male Infertility. Am J Hum Genet 2020; 107:342-351. [PMID: 32673564 PMCID: PMC7413853 DOI: 10.1016/j.ajhg.2020.06.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 06/12/2020] [Indexed: 01/08/2023] Open
Abstract
Male infertility affects ∼7% of men, but its causes remain poorly understood. The most severe form is non-obstructive azoospermia (NOA), which is, in part, caused by an arrest at meiosis. So far, only a few validated disease-associated genes have been reported. To address this gap, we performed whole-exome sequencing in 58 men with unexplained meiotic arrest and identified the same homozygous frameshift variant c.676dup (p.Trp226LeufsTer4) in M1AP, encoding meiosis 1 associated protein, in three unrelated men. This variant most likely results in a truncated protein as shown in vitro by heterologous expression of mutant M1AP. Next, we screened four large cohorts of infertile men and identified three additional individuals carrying homozygous c.676dup and three carrying combinations of this and other likely causal variants in M1AP. Moreover, a homozygous missense variant, c.1166C>T (p.Pro389Leu), segregated with infertility in five men from a consanguineous Turkish family. The common phenotype between all affected men was NOA, but occasionally spermatids and rarely a few spermatozoa in the semen were observed. A similar phenotype has been described for mice with disruption of M1ap. Collectively, these findings demonstrate that mutations in M1AP are a relatively frequent cause of autosomal recessive severe spermatogenic failure and male infertility with strong clinical validity.
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Affiliation(s)
- Margot J Wyrwoll
- Institute of Human Genetics, University of Münster, 48149 Münster, Germany
| | - Şehime G Temel
- Bursa Uludag University, Faculty of Medicine, Department of Medical Genetics & Department of Histology & Embryology & Health Sciences Institute, Department of Translational Medicine, 16059 Bursa, Turkey
| | - Liina Nagirnaja
- Division of Genetics, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006, USA
| | - Manon S Oud
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 Nijmegen, the Netherlands
| | - Alexandra M Lopes
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), 4200-804 Porto, Portugal; Instituto de Investigação e Inovação em Saúde (i3s), Universidade do Porto, 4099-002 Porto, Portugal
| | - Godfried W van der Heijden
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 Nijmegen, the Netherlands; Department of Obstetrics and Gynecology, Radboud University Medical Center, 6525 Nijmegen, the Netherlands
| | - James S Heald
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, NE2 4HH Newcastle upon Tyne, UK
| | - Nadja Rotte
- Institute of Human Genetics, University of Münster, 48149 Münster, Germany; Centre of Reproductive Medicine and Andrology, Institute of Reproductive Medicine, University of Münster, 48149 Münster, Germany
| | - Joachim Wistuba
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive Medicine, University of Münster, 48149 Münster, Germany
| | - Marius Wöste
- Institute of Medical Informatics, University of Münster, 48149 Münster, Germany
| | - Susanne Ledig
- Institute of Human Genetics, University of Münster, 48149 Münster, Germany
| | - Henrike Krenz
- Institute of Medical Informatics, University of Münster, 48149 Münster, Germany
| | - Roos M Smits
- Department of Obstetrics and Gynecology, Radboud University Medical Center, 6525 Nijmegen, the Netherlands
| | - Filipa Carvalho
- Instituto de Investigação e Inovação em Saúde (i3s), Universidade do Porto, 4099-002 Porto, Portugal; Serviço de Genética, Departamento de Patologia, Faculdade de Medicina da Universidade do Porto, 4099-002 Porto, Portugal
| | - João Gonçalves
- Departmento de Genética Humana, Instituto Nacional de Saúde Dr. Ricardo Jorge, 1649-016 Lisboa, Portugal; ToxOmics - Centro de Toxicogenómica e Saúde Humana, Nova Medical School, 1169-056 Lisboa, Portugal
| | - Daniela Fietz
- Institute of Veterinary Anatomy, Histology and Embryology, Justus Liebig University, 35392 Gießen, Germany
| | - Burcu Türkgenç
- University of Acibadem, Acibadem Genetic Diagnostic Centre, 34662 Istanbul, Turkey
| | - Mahmut C Ergören
- Near East University, Faculty of Medicine, Department of Medical Biology, 99138 Nicosia, Cyprus
| | - Murat Çetinkaya
- Istanbul Memorial Hospital, Assisted Reproductive Technologies and Reproductive Genetics Centre, 34385 Istanbul, Turkey
| | - Murad Başar
- Istanbul Memorial Hospital, Department of Urology & Andrology, 34385 Istanbul, Turkey
| | - Semra Kahraman
- Istanbul Memorial Hospital, Assisted Reproductive Technologies and Reproductive Genetics, 34385 Istanbul, Turkey
| | - Kevin McEleny
- Newcastle Fertility Centre, The Newcastle upon Tyne Hospitals NHS Foundation Trust, NE1 4EP Newcastle upon Tyne, UK
| | - Miguel J Xavier
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, NE2 4HH Newcastle upon Tyne, UK
| | - Helen Turner
- Department of Cellular Pathology, The Newcastle upon Tyne Hospitals NHS Foundation Trust, NE1 4LP Newcastle upon Tyne, UK
| | - Adrian Pilatz
- Clinic for Urology, Pediatric Urology and Andrology, Justus Liebig University, 35392 Gießen, Germany
| | - Albrecht Röpke
- Institute of Human Genetics, University of Münster, 48149 Münster, Germany
| | - Martin Dugas
- Institute of Medical Informatics, University of Münster, 48149 Münster, Germany
| | - Sabine Kliesch
- Centre of Reproductive Medicine and Andrology, Department of Clinical and Surgical Andrology, University Hospital Münster, 48149 Münster, Germany
| | - Nina Neuhaus
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive Medicine, University of Münster, 48149 Münster, Germany
| | - Kenneth I Aston
- Andrology and IVF Laboratories, Department of Surgery, University of Utah School of Medicine, Salt Lake City, UT 84132, USA
| | - Donald F Conrad
- Division of Genetics, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006, USA
| | - Joris A Veltman
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 Nijmegen, the Netherlands; Biosciences Institute, Faculty of Medical Sciences, Newcastle University, NE2 4HH Newcastle upon Tyne, UK
| | - Corinna Friedrich
- Institute of Human Genetics, University of Münster, 48149 Münster, Germany
| | - Frank Tüttelmann
- Institute of Human Genetics, University of Münster, 48149 Münster, Germany.
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Kahraman S, Çetinkaya CP, Çetinkaya M, Tüfekçi MA, Ekmekçi CG, Montag M. Is there a correlation between follicle size and gene expression in cumulus cells and is gene expression an indicator of embryo development? Reprod Biol Endocrinol 2018; 16:69. [PMID: 30031399 PMCID: PMC6054838 DOI: 10.1186/s12958-018-0388-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 07/10/2018] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND In an article published in 2017, we discussed the results of the first part of our study into the morphokinetic development of embryos in relation to follicle diameter and homogeneity of follicular development. Our findings showed that embryos coming from small follicles in heterogeneous cycles had significantly higher rates of arrest or failure to reach blastocyst than embryos coming from large follicles in homogenous cycles. The aim of this further study was to investigate the relationship between follicular size and gene expression of cumulus cells (CCs) and evaluate whether gene expression could be an indicator of embryo development. METHODS This study was based on 2495 COCs from 184 patients. CC expressions of five genes (TNFAIP6, PTGS2, HAS2, PTX3 and GDF9) were studied by generalized linear mixed models (GLMMs) regarding follicular size. CC expressions were then separately analysed regarding patient-specific variables (age, BMI, AMH and follicular size) in relation to embryos reaching blastocyst (eRB) or top or good quality blastocysts (TQ + GQ) using GLMMs with logit link. RESULTS Follicular size significantly correlated with the potential of an oocyte to develop into a blastocyst: oocytes developing from large follicles were more than twice as likely to develop into an eRB than oocytes from small follicles (p < 0.001). Gene expression of HAS2 and GDF9 correlated with blastocyst quality when separately evaluated with follicular size and the patient specific variables of age, BMI and AMH. However, no such correlation was found in other gene expressions studied. CONCLUSIONS Our findings suggest that differences in the expression of genes studied could be related to follicular size rather than to embryo quality. Although gene expression of HAS2 and GDF9 correlated with blastocyst quality, the only variable correlating with eRB and TQ and GQ blastocysts for each of these five models was follicular size. TRIAL REGISTRATION This prospective cohort study was registered at clinicaltrials.gov (NCT02230449).
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Affiliation(s)
- Semra Kahraman
- Istanbul Memorial Hospital, Assisted Reproductive Technologies and Reproductive Genetics Centre, Piyale Pasa Bulvari 34385 Okmeydani Sisli, Istanbul, Turkey.
| | - Caroline Pirkevi Çetinkaya
- Istanbul Memorial Hospital, Assisted Reproductive Technologies and Reproductive Genetics Centre, Piyale Pasa Bulvari 34385 Okmeydani Sisli, Istanbul, Turkey
| | - Murat Çetinkaya
- Istanbul Memorial Hospital, Assisted Reproductive Technologies and Reproductive Genetics Centre, Piyale Pasa Bulvari 34385 Okmeydani Sisli, Istanbul, Turkey
| | - Mehmet Ali Tüfekçi
- Istanbul Memorial Hospital, Assisted Reproductive Technologies and Reproductive Genetics Centre, Piyale Pasa Bulvari 34385 Okmeydani Sisli, Istanbul, Turkey
| | - Cumhur Gökhan Ekmekçi
- Istanbul Memorial Hospital, Assisted Reproductive Technologies and Reproductive Genetics Centre, Piyale Pasa Bulvari 34385 Okmeydani Sisli, Istanbul, Turkey
| | - Markus Montag
- ilabcomm GmbH, Eisenachstr. 34, 53757, Sankt Augustin, Germany
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Sariola V, Pena-Francesch A, Jung H, Çetinkaya M, Pacheco C, Sitti M, Demirel MC. Segmented molecular design of self-healing proteinaceous materials. Sci Rep 2015; 5:13482. [PMID: 26323335 PMCID: PMC4555047 DOI: 10.1038/srep13482] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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] [Received: 04/30/2015] [Accepted: 07/17/2015] [Indexed: 01/06/2023] Open
Abstract
Hierarchical assembly of self-healing adhesive proteins creates strong and robust structural and interfacial materials, but understanding of the molecular design and structure–property relationships of structural proteins remains unclear. Elucidating this relationship would allow rational design of next generation genetically engineered self-healing structural proteins. Here we report a general self-healing and -assembly strategy based on a multiphase recombinant protein based material. Segmented structure of the protein shows soft glycine- and tyrosine-rich segments with self-healing capability and hard beta-sheet segments. The soft segments are strongly plasticized by water, lowering the self-healing temperature close to body temperature. The hard segments self-assemble into nanoconfined domains to reinforce the material. The healing strength scales sublinearly with contact time, which associates with diffusion and wetting of autohesion. The finding suggests that recombinant structural proteins from heterologous expression have potential as strong and repairable engineering materials.
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Affiliation(s)
- Veikko Sariola
- Carnegie Mellon University, Department of Mechanical Engineering, Pittsburgh, PA, 15213, USA.,Aalto University, Department of Electrical Engineering and Automation, Espoo, 02150, Finland
| | - Abdon Pena-Francesch
- Pennsylvania State University, Department of Engineering Science and Mechanics, University Park, PA, 16802, USA
| | - Huihun Jung
- Pennsylvania State University, Department of Engineering Science and Mechanics, University Park, PA, 16802, USA
| | - Murat Çetinkaya
- BASF SE, Carl-Bosch Strasse 38, Ludwigshafen, 67056, Germany
| | - Carlos Pacheco
- Pennsylvania State University, Department of Chemistry, University Park, PA, 16802, USA
| | - Metin Sitti
- Carnegie Mellon University, Department of Mechanical Engineering, Pittsburgh, PA, 15213, USA.,Max Planck Institute for Intelligent Systems, Physical Intelligence Department, Stuttgart, 70569, Germany
| | - Melik C Demirel
- Pennsylvania State University, Department of Engineering Science and Mechanics, University Park, PA, 16802, USA.,Pennsylvania State University, Materials Research Institute and Huck Institutes of Life Sciences, University Park, PA, 16802, USA
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Kahraman S, Çetinkaya M, Pirkevi C, Yelke H, Kumtepe Y. Comparison of Blastocyst Development and Cycle Outcome in Patients with eSET Using Either Conventional or Time Lapse Incubators. A Prospective Study of Good Prognosis Patients. ACTA ACUST UNITED AC 2012. [DOI: 10.1177/205891581200300204] [Citation(s) in RCA: 30] [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: 11/15/2022]
Abstract
The aim of this study is to compare blastocyst development and cycle outcomes of good prognosis elective single embryo transfer patients using conventional or time lapse incubators. A randomized study was designed to evaluate embryo development until the blastocyst stage in either conventional or time-lapse incubators in good prognosis patients. Furthermore cycle outcomes of the patients were evaluated. The study involved 64 patients (33 for time-lapse and 31 for conventional incubation) in their first or second treatment cycle, with no recurrent spontaneous miscarriages, age<35 years, body mass index <28 kg/m2 and ≥8 oocytes retrieved. The primary outcome was the proportion of good and top quality blastocysts on day 5 and the secondary outcome was the implantation and pregnancy rates after elective single embryo transfer in good prognosis patients. The analysis performed revealed no statistical difference between both groups for blastocyst development, implantation and clinical pregnancy rates. In a selected good prognosis elective single embryo transfer population, similar rates of good and top quality blastocysts and comparable implantation and pregnancy rates were achieved. However, the stable culture conditions provided by time-lapse incubators and the use of morphokinetic parameters may allow the selection of the best available embryos with high developmental capacity, especially in poor prognosis patients.
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Affiliation(s)
- Semra Kahraman
- Şişli Memorial Hospital, Assisted Reproductive Techniques and Reproductive Genetics Center, Piyale Paşa Bulvarı 34385 Okmeydanı, Sişli, Istanbul, Turkey
| | - Murat Çetinkaya
- Şişli Memorial Hospital, Assisted Reproductive Techniques and Reproductive Genetics Center, Piyale Paşa Bulvarı 34385 Okmeydanı, Sişli, Istanbul, Turkey
| | - Caroline Pirkevi
- Şişli Memorial Hospital, Assisted Reproductive Techniques and Reproductive Genetics Center, Piyale Paşa Bulvarı 34385 Okmeydanı, Sişli, Istanbul, Turkey
| | - Hakan Yelke
- Şişli Memorial Hospital, Assisted Reproductive Techniques and Reproductive Genetics Center, Piyale Paşa Bulvarı 34385 Okmeydanı, Sişli, Istanbul, Turkey
| | - Yeşim Kumtepe
- Şişli Memorial Hospital, Assisted Reproductive Techniques and Reproductive Genetics Center, Piyale Paşa Bulvarı 34385 Okmeydanı, Sişli, Istanbul, Turkey
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Özkan H, Köksal N, Çetinkaya M, Kiliç Ş, Çelebi S, Oral B, Budak F. Serum mannose-binding lectin (MBL) gene polymorphism and low MBL levels are associated with neonatal sepsis and pneumonia. J Perinatol 2012; 32:210-7. [PMID: 21681178 DOI: 10.1038/jp.2011.79] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE The aim of this study was to determine the serum mannose-binding lectin (MBL) levels and the frequency of MBL gene polymorphisms in infants with neonatal sepsis. STUDY DESIGN Between January 2008 and January 2010, a total of 93 infants were included in this study and 53 of them had neonatal sepsis diagnosis as study group and 40 infants who had no sepsis according to clinical and laboratory findings as control group. RESULT Serum MBL levels were found to be low in 17 of 93 infants. Eleven of them were in the sepsis group and six of them were in the control group. Serum MBL levels were significantly lower in infants with sepsis compared with the control group. Frequencies of genotype AB and BB were also significantly higher in the study group compared with the control group. Most importantly, presence of B allele of MBL exon 1 gene was found to be associated with an increased risk for neonatal sepsis. Additionally, in the study group, the mean serum MBL levels were found to be significantly lower in the premature infants compared with the term infants. Pneumonia, bronchopulmonary dysplasia (BPD) and intraventricular hemorrhage (IVH) were significantly higher in infants with MBL deficiency compared with infants with normal MBL levels. CONCLUSION Low MBL levels and presence of B allele of MBL exon 1 gene were found to be important risk factors for development of both neonatal sepsis and pneumonia, especially in premature infants. Low MBL levels and MBL gene polymorphisms might also be associated with inflammation-related neonatal morbidities such as BPD and IVH.
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Affiliation(s)
- H Özkan
- Division of Neonatology, Department of Pediatrics, Uludag University School of Medicine, Bursa, Turkey
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