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Laqqan M, Ahmed I, Yasin M, Hammadeh ME, Yassin M. Influence of variation in global sperm DNA methylation level on the expression level of protamine genes and human semen parameters. Andrologia 2019; 52:e13484. [PMID: 31762067 DOI: 10.1111/and.13484] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/11/2019] [Accepted: 10/15/2019] [Indexed: 12/16/2022] Open
Abstract
An infertility problem is a complex issue that affects 15% approximately of couples worldwide. The current study was designed to evaluate if there is a variation in the status of global DNA methylation among the study groups and to assess their impact on the protamine expression level and human semen parameters. Totalling 200 semen samples were collected from men (50 proved fertile, 60 normospermia and 90 oligospermia) with an average age of 34.9 ± 4.3 years. The DNA and RNA were isolated from purified spermatozoa; then, ELISA and qPCR were applied to estimate the status of global sperm DNA methylation and protamine expression level respectively. Besides that, the sperm chromatin decondensation and sperm DNA fragmentation were assessed. A significant variation was found in the global sperm DNA methylation and the protamine 1 and protamine 2 expression level among the study groups (p ≤ .001). Down-regulation has been found in the protamine 1 and protamine 2 expression levels in the oligospermia group compared to the proved fertile group with fold change (0.001 and 0.0002 respectively). In conclusion, this study proposes that the alteration in global DNA methylation may influence the protamine expression level and may be lead to abnormalities in human semen parameters.
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Affiliation(s)
- Mohammed Laqqan
- Obstetrics and Gynecology Department, Assisted Reproduction Unit, Faculty of Medicine, University of Saarland, Homburg, Germany
| | - Islam Ahmed
- Obstetrics and Gynecology Department, Assisted Reproduction Unit, Faculty of Medicine, University of Saarland, Homburg, Germany
| | - Mohammed Yasin
- Faculty of Medicine, 6th of October University, 6th of October City, Egypt
| | - Mohamad Eid Hammadeh
- Obstetrics and Gynecology Department, Assisted Reproduction Unit, Faculty of Medicine, University of Saarland, Homburg, Germany
| | - Maged Yassin
- Human Physiology Department, Faculty of Medicine, Al-Azhar University, Gaza Strip
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52
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Zhang W, Li M, Sun F, Xu X, Zhang Z, Liu J, Sun X, Zhang A, Shen Y, Xu J, Miao M, Wu B, Yuan Y, Huang X, Shi H, Du J. Association of Sperm Methylation at LINE-1, Four Candidate Genes, and Nicotine/Alcohol Exposure With the Risk of Infertility. Front Genet 2019; 10:1001. [PMID: 31681430 PMCID: PMC6813923 DOI: 10.3389/fgene.2019.01001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 09/20/2019] [Indexed: 12/15/2022] Open
Abstract
In this study, we examined whether smoking and drinking affect sperm quality and the DNA methylation of the repetitive element LINE-1, MEST, P16, H19, and GNAS in sperm. Semen samples were obtained from 143 male residents in a minority-inhabited district of Guizhou province in southwest China. Quantitative DNA methylation analysis of the samples was performed using MassARRAY EpiTYPER assays. Sperm motility was significantly lower in both the nicotine-exposed (P = 0.0064) and the nicotine- and alcohol-exposed (P = 0.0008) groups. Follicle-stimulating hormone (FSH) levels were higher in the nicotine-exposed group (P = 0.0026). The repetitive element LINE-1 was hypermethylated in the three exposed groups, while P16 was hypomethylated in the alcohol and both the alcohol and nicotine exposure groups. Our results also show that alcohol and nicotine exposure altered sperm cell quality, which may be related to the methylation levels of MEST and GNAS. In addition, MEST, GNAS, and the repetitive element LINE1 methylation was significantly associated with the concentration of sperm as well as FSH and luteinizing hormone levels.
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Affiliation(s)
- Wenjing Zhang
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China.,Reproductive Medical Center, Changhai Hospital of Shanghai, Shanghai, China
| | - Min Li
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Feng Sun
- Department of Obstetrics and Gynecology, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xuting Xu
- Huzhou Key Laboratory of Molecular Medicine, Huzhou Central Hospital, Zhejiang, China
| | - Zhaofeng Zhang
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Junwei Liu
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Xiaowei Sun
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Aiping Zhang
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, China
| | - Yupei Shen
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Jianhua Xu
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Maohua Miao
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Bin Wu
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Yao Yuan
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Xianliang Huang
- Shanghai Institute of Planned Parenthood Research Hospital, Shanghai, China
| | - Huijuan Shi
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
| | - Jing Du
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, China
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Ugur MR, Saber Abdelrahman A, Evans HC, Gilmore AA, Hitit M, Arifiantini RI, Purwantara B, Kaya A, Memili E. Advances in Cryopreservation of Bull Sperm. Front Vet Sci 2019; 6:268. [PMID: 31552277 PMCID: PMC6736622 DOI: 10.3389/fvets.2019.00268] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 08/02/2019] [Indexed: 12/13/2022] Open
Abstract
Cryopreservation of semen and artificial insemination have an important, positive impact on cattle production, and product quality. Through the use of cryopreserved semen and artificial insemination, sperm from the best breeding bulls can be used to inseminate thousands of cows around the world. Although cryopreservation of bull sperm has advanced beyond that of other species, there are still major gaps in the knowledge and technology bases. Post-thaw viability of sperm is still low and differs significantly among the breeding bulls. These weaknesses are important because they are preventing advances both in fundamental science of mammalian gametes and reproductive biotechnology. Various extenders have been developed and supplemented with chemicals to reduce cryodamage or oxidative stress with varying levels of success. More detailed insights on sperm morphology and function have been uncovered through application of advanced tools in modern molecular and cell biology. This article provides a concise review of progress in the cryopreservation of bull sperm, advances in extender development, and frontiers using diverse techniques of the study of sperm viability. This scientific resource is important in animal biotechnology because with the advances in discovery of sperm fertility markers, there is an urgent need to improve post-thaw viability and fertility of sperm through enhanced cryopreservation for precision agriculture to produce food animals to ensure food security on the global scale.
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Affiliation(s)
- Muhammet Rasit Ugur
- Department of Animal and Dairy Sciences, Mississippi State University, Starkville, MS, United States
| | - Amal Saber Abdelrahman
- Department of Clinic, Reproduction and Pathology, Faculty of Veterinary Medicine, Bogor Agricultural University, Bogor, Indonesia
| | - Holly C. Evans
- Department of Animal and Dairy Sciences, Mississippi State University, Starkville, MS, United States
| | - Alicia A. Gilmore
- Department of Animal and Dairy Sciences, Mississippi State University, Starkville, MS, United States
| | - Mustafa Hitit
- Department of Animal and Dairy Sciences, Mississippi State University, Starkville, MS, United States
- Department of Genetics, Faculty of Veterinary Medicine, Kastamonu University, Kastamonu, Turkey
| | - Raden Iis Arifiantini
- Department of Clinic, Reproduction and Pathology, Faculty of Veterinary Medicine, Bogor Agricultural University, Bogor, Indonesia
| | - Bambang Purwantara
- Department of Clinic, Reproduction and Pathology, Faculty of Veterinary Medicine, Bogor Agricultural University, Bogor, Indonesia
| | - Abdullah Kaya
- Department of Reproduction and Artificial Insemination, Selcuk University, Konya, Turkey
| | - Erdogan Memili
- Department of Animal and Dairy Sciences, Mississippi State University, Starkville, MS, United States
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Pan Y, Wang M, Baloch AR, Zhang Q, Wang J, Ma R, Xu G, Kashif J, Wang L, Fan J, Cui Y, Yu S. FGF10 enhances yak oocyte fertilization competence and subsequent blastocyst quality and regulates the levels of CD9, CD81, DNMT1, and DNMT3B. J Cell Physiol 2019; 234:17677-17689. [PMID: 30807658 DOI: 10.1002/jcp.28394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/22/2019] [Accepted: 01/24/2019] [Indexed: 12/13/2022]
Abstract
The fusion of sperm and oocytes determines the fertilization competence and subsequent development of embryos, which, in turn, can be affected by various proteins and DNA methylation. However, several factors in this whole regulation process remain unknown, especially in yaks. Here, we report that fibroblast growth factor 10 (FGF10) is an important growth factor that can enhance the maturation rate of yak oocytes and the motility of frozen spermatozoa. Subsequent blastocyst quality was also improved by increasing the total cell number and level of pregnancy-associated protein in blastocysts. These effects were significantly high in the group that received the 5 ng/ml FGF10 treatment, during both in vitro maturation (IVM) and capacitation. Our data show that the effects of FGF10 were dose-dependent at vital steps of embryogenesis in vitro. Furthermore, quantitative polymerase chain reaction, western blot analysis, and immunofluorescence demonstrated that the levels of CD9, CD81, DNMT1, and DNMT3B in both mature cumulus-oocyte complexes and capacitated sperms were regulated by FGF10, which was also highly expressed in the group treated with 5 ng/ml FGF10 during both IVM and capacitation. From our present study, we concluded that FGF10 promotes yak oocyte fertilization competence and subsequent blastocyst quality, and could also regulate CD9, CD81, DNMT1, and DNMT3B to optimize sperm-oocyte interactions and DNA methylation during fertilization.
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Affiliation(s)
- Yangyang Pan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Meng Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Abdul Rasheed Baloch
- South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Vodňany, Czech Republic
| | - Qiang Zhang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Jinglei Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Rui Ma
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Gengquan Xu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Jam Kashif
- Department of Veterinary Medicine, Sindh Agriculture University, Tandojam, Pakistan
| | - Libin Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Jiangfeng Fan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Yan Cui
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Sijiu Yu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu, China
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Sarkar S, Sujit KM, Singh V, Pandey R, Trivedi S, Singh K, Gupta G, Rajender S. Array-based DNA methylation profiling reveals peripheral blood differential methylation in male infertility. Fertil Steril 2019; 112:61-72.e1. [DOI: 10.1016/j.fertnstert.2019.03.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 03/13/2019] [Accepted: 03/13/2019] [Indexed: 12/27/2022]
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Sujit KM, Sarkar S, Singh V, Pandey R, Agrawal NK, Trivedi S, Singh K, Gupta G, Rajender S. Genome-wide differential methylation analyses identifies methylation signatures of male infertility. Hum Reprod 2019; 33:2256-2267. [PMID: 30358834 DOI: 10.1093/humrep/dey319] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 10/17/2018] [Indexed: 01/18/2023] Open
Abstract
STUDY QUESTION Do methylation changes in sperm DNA correlate with infertility? STUDY ANSWER Loss of spermatogenesis and fertility was correlated with 1680 differentially-methylated CpGs (DMCs) across 1052 genes. WHAT IS KNOWN ALREADY Methylation changes in a number of genes have been correlated with reduced sperm count and motility. STUDY DESIGN, SIZE, DURATION This case-control study used spermatozoal DNA from 38 oligo-/oligoastheno-zoospermic infertile patients and 26 normozoospermic fertile men. PARTICIPANTS/MATERIALS, SETTINGS, METHODS Genome-wide methylation analysis was undertaken using 450 K BeadChip on spermatozoal DNA from six infertile and six fertile men to identify DMCs. This was followed by deep sequencing of spermatozoal DNA from 32 infertile patients and 20 fertile controls. MAIN RESULTS AND THE ROLE OF CHANCE A total of 1680 DMCs were identified, out of which 1436 were hypermethylated and 244 were hypomethylated. Classification of DMCs according to the genes identified BCAN, CTNNA3, DLGAP2, GATA3, MAGI2 and TP73 among imprinted genes, SPATA5, SPATA7, SPATA16 and SPATA22 among spermatogenesis-associated genes, KDM4C and JMJD1C, EZH2 and HDAC4 among genes which regulate methylation and gene expression, HLA-C, HLA-DRB6 and HLA-DQA1 among complementation and immune response genes, and CRISPLD1, LPHN3 and CPEB2 among other genes. Genes showing significant differential methylation in deep sequencing, i.e. HOXB1, GATA3, EBF3, BCAN and TCERG1L, are strong candidates for further investigations. The role of chance was ruled out by deep sequencing of select genes. LARGE-SCALE DATA N/A. LIMITATIONS, REASON FOR CAUTION Genome-wide analyses are fairly accurate, but may not be exactly validated in replication studies across all DMCs. We used the 't' test in the genome-wide methylation analysis, whereas other tests could provide a more robust and powerful analysis. WIDER IMPLICATIONS OF THE FINDINGS DMCs can serve as markers for inclusion in infertility screening panels, particularly those in the genes showing differential methylation consistent with previous studies. The genes validated by deep sequencing are strong candidates for investigations of their roles in spermatogenesis. STUDY FUNDING/COMPETING INTEREST(S) The study was funded by the Council of Scientific and Industrial Research (CSIR), Govt. of India with grant number BSC0101 awarded to Rajender Singh. None of the authors has any competing interest to declare.
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Affiliation(s)
| | - Saumya Sarkar
- Division of Endocrinology, Central Drug Research Institute, Lucknow, India
| | - Vertika Singh
- Department of Molecular and Human Genetics, Banaras Hindu University, Varanasi, India
| | - Rajesh Pandey
- CSIR Ayurgenomics Unit-TRISUTRA, CSIR-Institute of Genomics and Integrative Biology, New Delhi, India.,Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Neeraj Kumar Agrawal
- Department of Endocrinology and Metabolism, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Sameer Trivedi
- Department of Urology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Kiran Singh
- Department of Molecular and Human Genetics, Banaras Hindu University, Varanasi, India
| | - Gopal Gupta
- Division of Endocrinology, Central Drug Research Institute, Lucknow, India
| | - Singh Rajender
- Division of Endocrinology, Central Drug Research Institute, Lucknow, India
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Zhang JJ, Chandimali N, Kim N, Kang TY, Kim SB, Kim JS, Wang XZ, Kwon T, Jeong DK. Demethylation and microRNA differential expression regulate plasma-induced improvement of chicken sperm quality. Sci Rep 2019; 9:8865. [PMID: 31222092 PMCID: PMC6586908 DOI: 10.1038/s41598-019-45087-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 05/22/2019] [Indexed: 01/24/2023] Open
Abstract
The sperm quality is a vital economical requisite of poultry production. Our previous study found non-thermal dielectric barrier discharge plasma exposure on fertilized eggs could increase the chicken growth and the male reproduction. However, it is unclear how plasma treatment regulates the reproductive capacity in male chickens. In this study, we used the optimal plasma treatment condition (2.81 W for 2 min) which has been applied on 3.5-day-incubated fertilized eggs in the previous work and investigated the reproductive performance in male chickens aged at 20 and 40 weeks. The results showed that plasma exposure increased sperm count, motility, fertility rate, and fertilization period of male chickens. The sperm quality-promoting effect of plasma treatment was regulated by the significant improvements of adenosine triphosphate production and testosterone level, and by the modulation of reactive oxygen species balance and adenosine monophosphate-activated protein kinase and mammalian target of rapamycin pathway in the spermatozoa. Additionally, the plasma effect suggested that DNA demethylation and microRNA differential expression (a total number of 39 microRNAs were up-regulated whereas 53 microRNAs down-regulated in the testis) regulated the increases of adenosine triphosphate synthesis and testosterone level for promoting the chicken sperm quality. This finding might be beneficial to elevate the fertilization rate and embryo quality for the next generation in poultry breeding.
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Affiliation(s)
- Jiao Jiao Zhang
- Chongqing Key Laboratory of Forage and Herbivore, College of Animal Science and Technology, Southwest University, Chongqing, 400715, P.R. China
| | - Nisansala Chandimali
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea
| | - Nameun Kim
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea
| | - Tae Yoon Kang
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea
| | - Seong Bong Kim
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan-si, Jeollabuk-Do, 54004, Republic of Korea
| | - Ji Su Kim
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup-si, Jeonbuk, 56216, Republic of Korea
| | - Xian Zhong Wang
- Chongqing Key Laboratory of Forage and Herbivore, College of Animal Science and Technology, Southwest University, Chongqing, 400715, P.R. China.
| | - Taeho Kwon
- Primate Resources Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup-si, Jeonbuk, 56216, Republic of Korea.
| | - Dong Kee Jeong
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea.
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Rahiminia T, Farashahi Yazd E, Ghasemi-Esmailabad S, Talebi AR. Relation between sperm protamine transcripts with global sperm DNA methylation and sperm DNA methyltransferases mRNA in men with severe sperm abnormalities. HUM FERTIL 2019; 24:105-111. [PMID: 31023108 DOI: 10.1080/14647273.2019.1574032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This study aimed to evaluate the relationship between mRNA expression of DNA methyltransferases (DNMTs) such as DNMT1, DNMT3A and DNMT3B mRNA and sperm global DNA methylation with protamine transcripts in the sperm from men with severe sperm abnormalities. Sperm from each semen sample were isolated using a standard gradient isolation procedure by layering 1 mL of 40% (v/v) density gradient medium over 1 mL of 80% (v/v). A total of 30 oligoasthenoteratozoospermic ejaculates (OAT) and 30 normozoospermic ejaculates as controls were compared using real-time quantitative reverse transcriptase polymerase chain reaction for mRNA expression of DNMT1, 3A, 3B, protamine1 (P1) and protamine2 (P2). The enzyme-linked immunosorbent assay was used to detect global DNA methylation in sperm. A p-value of <0.05 was considered statistically significant. In OAT ejaculates, the increased level of DNMT3A, 3B mRNA, sperm global methylation, P1 plus P2 mRNA and decrease of P1-P2 ratio were significantly different. Also the content of protamine transcript was not correlated with sperm parameters. The increased total protamine transcript levels were associated with increased mRNA methyltransferases. The increase of DNMT1 may lead to an increased level of global methylation.
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Affiliation(s)
- Tahereh Rahiminia
- Gametogenesis Research Center, Fertility and Infertility Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Ehsan Farashahi Yazd
- Stem Cell Biology Research Center Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Saeed Ghasemi-Esmailabad
- Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Ali Reza Talebi
- Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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Tian M, Liu L, Zhang J, Huang Q, Shen H. Positive association of low-level environmental phthalate exposure with sperm motility was mediated by DNA methylation: A pilot study. CHEMOSPHERE 2019; 220:459-467. [PMID: 30594797 DOI: 10.1016/j.chemosphere.2018.12.155] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/21/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
Accumulating evidence indicates that phthalate exposures may affect human semen quality. Epigenetic modifications such as DNA methylation might be linked chemical exposure and spermatogenesis epigenetic reprogramming. In the present study, we investigated associations between phthalate exposures, DNA methylation and sperm quality in undergoing fertility assessment male population. Urine was used for phthalate exposures monitoring, six selected metabolites (i.e., monomethyl phthalate (MMP), monoethyl phthalate (MEP), mono-n-butyl phthalate (MBP), monobenzyl phthalate (MBzP), mono-(2-ethylhexyl) phthalate (MEHP) and mono (2-ethyl-5-oxohexyl) phthalate (MEOHP)) were measured by using HPLC-MS/MS. Sperm quality parameters were determined by computer-assisted semen analysis (CASA). Sperm DNA methylation patterns (long interspersed nuclear element-1(LINE-1), H19 and LIT1) were analysed employing high-melting resolution (HRM) PCR. Urinary MMP, MEHP, MEOHP, sum of DEHP metabolites (∑DEHP) and sum of selected phthalates metabolites (∑PAEs) were significantly positively associated with sperm motility. Sperm LINE-1 DNA methylation were found to be negatively associated with ∑DEHP exposure and sperm quality (ejaculate volume, total sperm number and motility). Epigenetic modification LINE-1 DNA methylation demonstrated mediating effects in association between DEHP exposure and sperm motility, and 20.7% of the association was mediated by serum LIEN-1 DNA methylation. These results extend the previous studies in association between phthalate exposures and classical semen parameters, mainly of inverse association, and sperm DNA methylation may be linked phthalate exposures and male reproductive health outcome.
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Affiliation(s)
- Meiping Tian
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Liangpo Liu
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Jie Zhang
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Qingyu Huang
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Heqing Shen
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
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Raad G, Azouri J, Rizk K, Zeidan NS, Azouri J, Grandjean V, Hazzouri M. Adverse effects of paternal obesity on the motile spermatozoa quality. PLoS One 2019; 14:e0211837. [PMID: 30742661 PMCID: PMC6370200 DOI: 10.1371/journal.pone.0211837] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 01/21/2019] [Indexed: 12/11/2022] Open
Abstract
Growing evidence suggests that paternal obesity may decrease male fertility potential. During infertility treatment with intra-cytoplasmic sperm injection (ICSI), a morphologically normal motile spermatozoon is injected into a mature egg, when possible. However, sperm motility and morphology per se do not reflect the sperm molecular composition. In this study, we aimed to assess the quality of motile spermatozoa in the context of obesity by analysing their conventional and molecular characteristics as well as their ability to promote early embryonic development. A prospective study was conducted on 128 infertile men divided into three groups: 40 lean, 42 overweight, and 46 obese men. Conventional sperm parameters (concentration, motility and morphology) and sperm molecular status (chromatin composition and integrity, 5-methycytosine (5-mC) and 5-hydroxycytosine (5-hmC) contents and oxidative stress level) were analysed on raw semen and/or on motile spermatozoa selected by density gradient or swim-up techniques. Morphokinetic analysis of the embryos derived from ICSI was performed using the Embryoviewer software. Our results showed that the motile sperm-enriched fraction from obese men exhibited higher levels of retained histones (p<0.001), elevated percentage of altered chromatin integrity (p<0.001), and decreased contents of 5-hmC (p<0.001), and 5-mC (p<0.05) levels as compared to that from lean men. Importantly, there were no statistically significant correlations between these molecular parameters and the percentages of morphologically normal motile spermatozoa. Regarding embryo morphokinetics, the CC1 (p<0.05) and CC3 (p<0.05) embryonic cell cycles were significantly delayed in the cleavage embryos of the obese group as compared to the embryos of the lean group. Our data is of particular interest because, besides demonstrating the negative impacts of obesity on motile spermatozoa molecular composition, it also highlights the possible risk of disturbing early embryonic cell cycles kinetics in the context of paternal obesity.
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Affiliation(s)
- Georges Raad
- Azoury-IVF clinic, Mount Lebanon Hospital, Camille Chamoun Boulevard, Beirut, Lebanon
- Lebanese University, Faculty of Sciences 2, Fanar, Lebanon
| | - Joseph Azouri
- Azoury-IVF clinic, Mount Lebanon Hospital, Camille Chamoun Boulevard, Beirut, Lebanon
| | - Kamal Rizk
- Azoury-IVF clinic, Mount Lebanon Hospital, Camille Chamoun Boulevard, Beirut, Lebanon
| | - Nina S. Zeidan
- Lebanese University, Faculty of Sciences 2, Fanar, Lebanon
| | - Jessica Azouri
- Azoury-IVF clinic, Mount Lebanon Hospital, Camille Chamoun Boulevard, Beirut, Lebanon
| | - Valérie Grandjean
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 10 “Control of gene expression “, Nice, France and University of Nice Sophia Antipolis, Faculty of Medecine, Nice, France
- * E-mail:
| | - Mira Hazzouri
- Lebanese University, Faculty of Sciences 2, Fanar, Lebanon
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61
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Ni W, Pan C, Pan Q, Fei Q, Huang X, Zhang C. Methylation levels of
IGF2
and
KCNQ1
in spermatozoa from infertile men are associated with sperm DNA damage. Andrologia 2019; 51:e13239. [PMID: 30680773 DOI: 10.1111/and.13239] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/21/2018] [Accepted: 12/29/2018] [Indexed: 12/12/2022] Open
Affiliation(s)
- Wuhua Ni
- Department of Clinical Laboratory, Jinling Hospital, Nanjing School of Clinical Medicine Southern Medical University (Nanjing General Hospital of Nanjing Military Region) Nanjing China
- Reproductive Medicine CenterThe First Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Chengshuang Pan
- Reproductive Medicine CenterThe First Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Qiongqiong Pan
- Reproductive Medicine CenterThe First Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Qianjin Fei
- Reproductive Medicine CenterThe First Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Xuefeng Huang
- Reproductive Medicine CenterThe First Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Chunni Zhang
- Department of Clinical Laboratory, Jinling Hospital, Nanjing School of Clinical Medicine Southern Medical University (Nanjing General Hospital of Nanjing Military Region) Nanjing China
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62
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Plasma Farming: Non-Thermal Dielectric Barrier Discharge Plasma Technology for Improving the Growth of Soybean Sprouts and Chickens. PLASMA 2018. [DOI: 10.3390/plasma1020025] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Non-thermal dielectric barrier discharge (DBD) plasma is an innovative and emerging field combining plasma physics, life science and clinical medicine for a wide-range of biological applications. Plasma techniques are applied in treating surfaces, materials or devices to realize specific qualities for subsequent special medical applications, plant seeds to improve the production and quality of crops, and living cells or tissues to realize therapeutic effects. Several studies that are summarized within this review show that non-thermal DBD plasma technique has potential biological applications in soybean sprout growth, chicken embryonic development and postnatal growth rate, and even male chicken reproductive capacity. The current developments in the non-thermal DBD plasma technique may be beneficial to improve plant and poultry productivity.
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Tang Q, Pan F, Yang J, Fu Z, Lu Y, Wu X, Han X, Chen M, Lu C, Xia Y, Wang X, Wu W. Idiopathic male infertility is strongly associated with aberrant DNA methylation of imprinted loci in sperm: a case-control study. Clin Epigenetics 2018; 10:134. [PMID: 30373665 PMCID: PMC6206675 DOI: 10.1186/s13148-018-0568-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 10/14/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Male infertility is a complex disease caused by a combination of genetic, environmental, and lifestyle factors. Abnormal epigenetic programming has been proposed as a possible mechanism compromising male fertility. Recent studies suggest that aberrant imprinting in spermatozoa in a subset of infertile men is a risk factor for congenital diseases in children conceived via assisted reproduction techniques. In this study, we examined the DNA methylation status of CpG sites within the differentially methylated regions (DMRs) of three imprinted genes, H19, GNAS, and DIRAS3, using combined bisulfite PCR restriction analysis and bisulfite sequencing in sperm obtained from 135 men with idiopathic male infertility, including normozoospermia (n = 39), moderate oligozoospermia (n = 45), and severe oligozoospermia (n = 51), and fertile controls (n = 59). The percentage of global methylation was compared between fertile controls and infertile patients displaying abnormal DNA methylation status of imprinted loci. Moreover, we also analyzed whether the DNA methyltransferases (DNMTs) polymorphisms impact upon the methylation patterns of imprinted genes in idiopathic infertile males. RESULTS Aberrant methylation patterns of imprinted genes were more prevalent in idiopathic infertile males, especially in patients with oligozoospermia. Infertile males with aberrant methylation patterns of imprinted genes displayed a tendency of lower global methylation levels, although not reaching statistical significance (P = 0.13). In the genotype-epigenotype correlation analysis, no significant association was observed between aberrant methylation patterns of the three imprinted genes and genotypes of the four DNA methyltransferase (DNMT) genes. CONCLUSION We conclude that abnormalities of DMR within imprinted genes may be associated with idiopathic male infertility. Disruption in methylation pattern of the three imprinted genes does not occur in high-risk genotypes of DNMTs.
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Affiliation(s)
- Qiuqin Tang
- Department of Obstetrics, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Feng Pan
- Department of Urology, The Affiliated Obstetrics and Gynecology Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, China
| | - Jing Yang
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Ziqiang Fu
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Yiwen Lu
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Xian Wu
- National Toxicology Program Laboratory, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Xiumei Han
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Minjian Chen
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Chuncheng Lu
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Yankai Xia
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Xinru Wang
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Wei Wu
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, China. .,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China. .,Department of Health and Human Services, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, USA.
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64
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Abstract
BACKGROUND Testicular germ cell tumor such as seminoma is strongly associated with male reproductive problems commonly associated with the alteration of sperm parameters as described in testicular dysgenesis syndrome. Interestingly, numerous studies have reported that the precursor of germ cell cancer, germ cell neoplasia in situ (GCNIS), present similarities to fetal gonocytes, specifically characterized by global DNA hypomethylation particularly on imprinting sequences. These disorders may have a common origin derived from perturbations of embryonal programming during fetal development. Presently, there is no available information concerning the sperm DNA methylation patterns of testicular cancer patients. For the first time, we evaluated the sperm imprinting of seminoma patients. A total of 92 cryopreserved sperm samples were included, 31 before seminoma treatment (S): 23 normozoospermic (SN) and 8 oligozoospermic (SO) and 61 sperm controls samples: 31 normozoospermic (N) and 30 oligozoospermic (O). DNA methylation levels of seven differentially methylated regions (DMRs) of imprinted genes [H19/IGF2: IG-DMR (CTCF3 and CTCF6 of H19 gene); IGF2-DMRs (DMR0 and DMR2); MEG3/DLK1:IG-DMR; SNURF:TSS-DMR; KCNQ1OT1:TSS-DMR] were assessed by pyrosequencing. All comparative analyses were adjusted for age. RESULTS Comparisons of sperm DNA methylation levels between seminoma (S) and normozoospermic (N) samples showed a significant difference for the SNURF sequence (p = 0.017), but after taking into account the sperm parameters, no difference was observed. However, we confirmed a significant association between oligozoospermia (O) and imprinting defects for H19/IGF2-CTCF6 (p = 0.001), MEG3/DLK1 (p = 0.017), IGF2-DMR2 (p = 0.022), and SNURF (p = 0.032) in comparison with control groups (N). CONCLUSIONS This study highlights the high risk of sperm imprinting defects in cases of oligozoospermia and shows for the first time that seminoma patients with normal spermatogenesis present sperm imprinting integrity. These data suggest a low probability of the involvement of a common imprinting defect in fetal cells leading to both TGCT and subfertility.
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65
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Hamad MF, Dayyih WAA, Laqqan M, AlKhaled Y, Montenarh M, Hammadeh ME. The status of global DNA methylation in the spermatozoa of smokers and non-smokers. Reprod Biomed Online 2018; 37:581-589. [PMID: 30366840 DOI: 10.1016/j.rbmo.2018.08.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 08/28/2018] [Accepted: 08/29/2018] [Indexed: 01/06/2023]
Abstract
RESEARCH QUESTION Does regular smoking affect semen quality and the levels of DNA methylation in mature human spermatozoa? DESIGN Spermatozoa from 109 men were evaluated (55 smokers and 54 non-smokers). DNA was extracted from purified spermatozoa, and DNA methylation was quantified by enzyme-linked immunosorbent assay (ELISA). RESULTS Global DNA methylation of non-smokers is significantly lower (P < 0.001) than that of smokers (4.85 ± 2.72 and 7.08 ± 1.77 ng/μl, respectively). Moreover, the mean global DNA methylation levels were significantly correlated (r = 0.22;P = 0.02) with non-condensed chromatin in the spermatozoa. Levels of non-condensed chromatin were significantly higher (P < 0.001) in smokers (29.75 ± 9.38%) compared with non-smokers (20.96 ± 11.31%). Furthermore, global sperm DNA methylation was negatively correlated with high significance (P < 0.010) with sperm: count (r = -0.27), motility (r = -0.30) and vitality (r = -0.26). CONCLUSION Smoking interferes with DNA methylation. Also, DNA methylation is significantly correlated with sperm parameters and sperm non-condensed chromatin. These data emphasize another detrimental effect of smoking on male fertility. DNA methylation may, therefore, be considered as a fertility marker in men.
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Affiliation(s)
- Mohammed F Hamad
- Department of Basic Sciences, College of Science and Health Professions, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia; IVF and Andrology Laboratory, Department of Obstetrics and Gynaecology, Saarland University Hospital, Building 9, Homburg/Saar 66424, Germany; Department of Medical Biochemistry and Molecular Biology, Saarland University, Building 44, 66424, Homburg/Saar, Germany.
| | - Wael A Abu Dayyih
- Department of Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Amman, Jordan
| | - Mohammad Laqqan
- IVF and Andrology Laboratory, Department of Obstetrics and Gynaecology, Saarland University Hospital, Building 9, Homburg/Saar 66424, Germany
| | - Yasir AlKhaled
- IVF and Andrology Laboratory, Department of Obstetrics and Gynaecology, Saarland University Hospital, Building 9, Homburg/Saar 66424, Germany
| | - Mathias Montenarh
- Department of Medical Biochemistry and Molecular Biology, Saarland University, Building 44, 66424, Homburg/Saar, Germany
| | - Mohammed E Hammadeh
- IVF and Andrology Laboratory, Department of Obstetrics and Gynaecology, Saarland University Hospital, Building 9, Homburg/Saar 66424, Germany
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66
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Ravel C, Kah O. [Endocrine disrupters: Towards an unsatisfying regulation]. Presse Med 2018; 47:943-949. [PMID: 30217365 DOI: 10.1016/j.lpm.2018.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 05/17/2018] [Accepted: 08/07/2018] [Indexed: 10/28/2022] Open
Abstract
Endocrine disruptors commonly make the headlines of newscasts and magazines, which is not without generating questions, even anxieties, with the general public. In a recent survey, 90% of French people considered it desirable to set up regulations concerning endocrine disruptors. However, under pressure from the lobbies of the chemical industry, and also due to scientific conflicts, the European Union is slow to legislate and has even been condemned before the European Court for failing to fulfill its obligations. This article does not intend to be exhaustive on the issue of endocrine disrupters, but rather to give the reader a certain number of keys enabling him to understand why national or European regulators are slow to establish specific regulation.
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Affiliation(s)
- Célia Ravel
- Université de Rennes 1, institut de recherche en santé, environnement et travail (Inserm U1085), 9, avenue Professeur-Léon-Bernard, 35000 Rennes, France; CHU de Rennes, hôpital Sud, laboratoire de biologie de la reproduction, CECOS, 16, boulevard de Bulgarie, 35203 Rennes cedex 2, France.
| | - Olivier Kah
- Université de Rennes 1, institut de recherche en santé, environnement et travail (Inserm U1085), 9, avenue Professeur-Léon-Bernard, 35000 Rennes, France.
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67
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Hanna CW, Demond H, Kelsey G. Epigenetic regulation in development: is the mouse a good model for the human? Hum Reprod Update 2018; 24:556-576. [PMID: 29992283 PMCID: PMC6093373 DOI: 10.1093/humupd/dmy021] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 05/20/2018] [Accepted: 06/05/2018] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Over the past few years, advances in molecular technologies have allowed unprecedented mapping of epigenetic modifications in gametes and during early embryonic development. This work is allowing a detailed genomic analysis, which for the first time can answer long-standing questions about epigenetic regulation and reprogramming, and highlights differences between mouse and human, the implications of which are only beginning to be explored. OBJECTIVE AND RATIONALE In this review, we summarise new low-cell molecular methods enabling the interrogation of epigenetic information in gametes and early embryos, the mechanistic insights these have provided, and contrast the findings in mouse and human. SEARCH METHODS Relevant studies were identified by PubMed search. OUTCOMES We discuss the levels of epigenetic regulation, from DNA modifications to chromatin organisation, during mouse gametogenesis, fertilisation and pre- and post-implantation development. The recently characterised features of the oocyte epigenome highlight its exceptionally unique regulatory landscape. The chromatin organisation and epigenetic landscape of both gametic genomes are rapidly reprogrammed after fertilisation. This extensive epigenetic remodelling is necessary for zygotic genome activation, but the mechanistic link remains unclear. While the vast majority of epigenetic information from the gametes is erased in pre-implantation development, new insights suggest that repressive histone modifications from the oocyte may mediate a novel mechanism of imprinting. To date, the characterisation of epigenetics in human development has been almost exclusively limited to DNA methylation profiling; these data reinforce that the global dynamics are conserved between mouse and human. However, as we look closer, it is becoming apparent that the mechanisms regulating these dynamics are distinct. These early findings emphasise the importance of investigations of fundamental epigenetic mechanisms in both mouse and humans. WIDER IMPLICATIONS Failures in epigenetic regulation have been implicated in human disease and infertility. With increasing maternal age and use of reproductive technologies in countries all over the world, it is becoming ever more important to understand the necessary processes required to establish a developmentally competent embryo. Furthermore, it is essential to evaluate the extent to which these epigenetic patterns are sensitive to such technologies and other adverse environmental exposures.
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Affiliation(s)
- Courtney W Hanna
- Epigenetics programme, Babraham Institute, Cambridge, UK
- Centre for Trophoblast Research, University of Cambridge, Cambridge, UK
| | - Hannah Demond
- Epigenetics programme, Babraham Institute, Cambridge, UK
| | - Gavin Kelsey
- Epigenetics programme, Babraham Institute, Cambridge, UK
- Centre for Trophoblast Research, University of Cambridge, Cambridge, UK
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68
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Gunes S, Metin Mahmutoglu A, Arslan MA, Henkel R. Smoking-induced genetic and epigenetic alterations in infertile men. Andrologia 2018; 50:e13124. [DOI: 10.1111/and.13124] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 07/18/2018] [Indexed: 02/06/2023] Open
Affiliation(s)
- Sezgin Gunes
- Department of Medical Biology, Faculty of Medicine; Ondokuz Mayis University; Samsun Turkey
- Department of Multidisciplinary Molecular Medicine, Health Sciences Institute; Ondokuz Mayis University; Samsun Turkey
| | - Asli Metin Mahmutoglu
- Department of Medical Biology, Faculty of Medicine; Ondokuz Mayis University; Samsun Turkey
| | - Mehmet Alper Arslan
- Department of Medical Biology, Faculty of Medicine; Ondokuz Mayis University; Samsun Turkey
- Department of Multidisciplinary Molecular Medicine, Health Sciences Institute; Ondokuz Mayis University; Samsun Turkey
| | - Ralf Henkel
- Department of Medical Bioscience; University of the Western Cape; Bellville South Africa
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69
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Sun TC, Zhang Y, Li HT, Liu XM, Yi DX, Tian L, Liu YX. Sperm DNA fragmentation index, as measured by sperm chromatin dispersion, might not predict assisted reproductive outcome. Taiwan J Obstet Gynecol 2018; 57:493-498. [DOI: 10.1016/j.tjog.2018.06.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/21/2018] [Indexed: 01/09/2023] Open
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70
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Zhang JJ, Do HL, Chandimali N, Lee SB, Mok YS, Kim N, Kim SB, Kwon T, Jeong DK. Non-thermal plasma treatment improves chicken sperm motility via the regulation of demethylation levels. Sci Rep 2018; 8:7576. [PMID: 29765100 PMCID: PMC5953930 DOI: 10.1038/s41598-018-26049-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 05/03/2018] [Indexed: 12/25/2022] Open
Abstract
The quality of avian semen is an important economic trait in poultry production. The present study examines the in vitro effects of non-thermal dielectric barrier discharge plasma on chicken sperm to determine the plasma conditions that can produce the optimum sperm quality. Exposure to 11.7 kV of plasma for 20 s is found to produce maximum sperm motility by controlling the homeostasis of reactive oxygen species and boosting the release of adenosine triphosphate and respiratory enzyme activity in the mitochondria. However, prolonged exposure or further increase in plasma potential impairs the sperm quality in a time- and dose-dependent manner. Optimal plasma treatment of sperm results in upregulated mRNA and protein expression of antioxidant defense-related and energetic metabolism-related genes by increasing their demethylation levels. However, 27.6 kV of plasma exerts significant adverse effects. Thus, our findings indicate that appropriate plasma exposure conditions improve chicken sperm motility by regulating demethylation levels of genes involved in antioxidant defense and energetic metabolism.
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Affiliation(s)
- Jiao Jiao Zhang
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea
| | - Huynh Luong Do
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea
| | - Nisansala Chandimali
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea
| | - Sang Baek Lee
- Department of Chemical and Biological Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Young Sun Mok
- Department of Chemical and Biological Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Nameun Kim
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea
| | - Seong Bong Kim
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan-si, Jeollabuk-Do, 54004, Republic of Korea
| | - Taeho Kwon
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Subtropical/Tropical Organism Gene Bank, Jeju National University, Jeju, 63243, Republic of Korea.
| | - Dong Kee Jeong
- Laboratory of Animal Genetic Engineering and Stem Cell Biology, Department of Advanced Convergence Technology and Science, Jeju National University, Jeju, 63243, Republic of Korea. .,Laboratory of Animal Genetic Engineering and Stem Cell Biology, Subtropical/Tropical Organism Gene Bank, Jeju National University, Jeju, 63243, Republic of Korea.
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71
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Woods LC, Li Y, Ding Y, Liu J, Reading BJ, Fuller SA, Song J. DNA methylation profiles correlated to striped bass sperm fertility. BMC Genomics 2018; 19:244. [PMID: 29636007 PMCID: PMC5894188 DOI: 10.1186/s12864-018-4548-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 02/13/2018] [Indexed: 01/11/2023] Open
Abstract
Background Striped bass (Morone saxatilis) spermatozoa are used to fertilize in vitro the eggs of white bass (M. chrysops) to produce the preferred hybrid for the striped bass aquaculture industry. Currently, only one source of domestic striped bass juveniles is available to growers that is not obtained from wild-caught parents and is thus devoid of any genetic improvement in phenotypic traits of importance to aquaculture. Sperm epigenetic modification has been predicted to be associated with fertility, which could switch genes on and off without changing the DNA sequence itself. DNA methylation is one of the most common epigenetic modification types and changes in sperm epigenetics can be correlated to sub-fertility or infertility in male striped bass. The objective of this study was to find the differentially methylated regions (DMRs) between high-fertility and sub-fertility male striped bass, which could potentially regulate the fertility performance. Results In our present study, we performed DNA methylation analysis of high-fertility and sub-fertility striped bass spermatozoa through MBD-Seq methods. A total of 171 DMRs were discovered in striped bass sperm correlated to fertility. Based on the annotation of these DMRs, we conducted a functional classification analysis and two important groups of genes including the WDR3/UTP12 and GPCR families, were discovered to be related to fertility performance of striped bass. Proteins from the WDR3/UTP12 family are involved in forming the sperm flagella apparatus in vertebrates and GPCRs are involved in hormonal signaling and regulation of tissue development, proliferation and differentiation. Conclusions Our results contribute insights into understanding the mechanism of fertility in striped bass, which will provide powerful tools to maximize reproductive efficiencies and to identify those males with superior gametes for this important aquaculture species. Electronic supplementary material The online version of this article (10.1186/s12864-018-4548-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- L Curry Woods
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Yaokun Li
- College of Animal Science, South China Agricultural University, Guangzhou, GD, 510642, China.
| | - Yi Ding
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Jianan Liu
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Benjamin J Reading
- Department of Applied Ecology, North Carolina State University, Raleigh, NC, 27695, USA
| | - S Adam Fuller
- HKD Stuttgart National Aquaculture Research Center, Agricultural Research Service, US Department of Agriculture, Stuttgart, AR, 72160, USA
| | - Jiuzhou Song
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA.
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72
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Alkhaled Y, Laqqan M, Tierling S, Lo Porto C, Hammadeh ME. DNA methylation level of spermatozoa from subfertile and proven fertile and its relation to standard sperm parameters. Andrologia 2018; 50:e13011. [DOI: 10.1111/and.13011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2018] [Indexed: 02/06/2023] Open
Affiliation(s)
- Y. Alkhaled
- Department of Obstetrics; Gynecology & Assisted Reproduction Laboratory; University of Saarland; Homburg Germany
| | - M. Laqqan
- Department of Obstetrics; Gynecology & Assisted Reproduction Laboratory; University of Saarland; Homburg Germany
| | - S. Tierling
- FR8.3 Life Science; Department of Genetics& Epigenetics; Saarland University; Homburg Germany
| | - C. Lo Porto
- FR8.3 Life Science; Department of Genetics& Epigenetics; Saarland University; Homburg Germany
| | - M. E. Hammadeh
- Department of Obstetrics; Gynecology & Assisted Reproduction Laboratory; University of Saarland; Homburg Germany
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73
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Ahmed I, Abdelateef S, Laqqan M, Amor H, Abdel-Lah MA, Hammadeh ME. Influence of extended incubation time on Human sperm chromatin condensation, sperm DNA strand breaks and their effect on fertilisation rate. Andrologia 2018; 50:e12960. [PMID: 29441594 DOI: 10.1111/and.12960] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2018] [Indexed: 11/29/2022] Open
Abstract
The purpose of this study was to determine influence of extended incubation time on sperm chromatin condensation and DNA strand breaks and their effect on fertilisation rate. Forty couples undergoing ICSI therapy were included. Semen was prepared by PureSperm gradient centrifugation and divided into two parts. The first part (G1) was used immediately for ICSI, whereas the second part (G2) was kept in the incubator at 37°C, 5% and 90% Humidity for 5 hr, and thereafter, the capacitated spermatozoa were used for ICSI. The TUNEL test and chromomycin CMA3 were used to evaluate the DNA strand breaks and chromatin condensation respectively. The percentage of condensed chromatin was 73.92 ± 12.70 in the group 1 and 81.13 ± 10.31% in group 2 (p = .001). However, the double-strand breaks were 11.15 ± 8.67% in G.1 and 16.30 ± 11.12% in G.2. (p = .001). Fertilisation rate in the (Group 1) was 62.45% and 69.17% in (Group 2). There was a positive correlation between condensed chromatin and fertilisation rate (r = 0.846, p = .001) and a negative correlation with DNA double-strand breaks (r = -0.802; p = .001). In conclusion, the prolonged sperm incubation (5 hr) leads to a higher chromatin condensation and to a significantly increased number of DNA strands double breaks with no influence on fertilisation rates.
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Affiliation(s)
- I Ahmed
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
- Department of Obstetrics & Gynecology, Sohag University, Sohag, Egypt
| | - S Abdelateef
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
| | - M Laqqan
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
| | - H Amor
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
| | - M A Abdel-Lah
- Department of Obstetrics & Gynecology, Sohag University, Sohag, Egypt
| | - M E Hammadeh
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
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74
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Chinnasamy T, Kingsley JL, Inci F, Turek PJ, Rosen MP, Behr B, Tüzel E, Demirci U. Guidance and Self-Sorting of Active Swimmers: 3D Periodic Arrays Increase Persistence Length of Human Sperm Selecting for the Fittest. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700531. [PMID: 29610725 PMCID: PMC5827459 DOI: 10.1002/advs.201700531] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/09/2017] [Indexed: 05/19/2023]
Abstract
Male infertility is a reproductive disease, and existing clinical solutions for this condition often involve long and cumbersome sperm sorting methods, including preprocessing and centrifugation-based steps. These methods also fall short when sorting for sperm free of reactive oxygen species, DNA damage, and epigenetic aberrations. Although several microfluidic platforms exist, they suffer from structural complexities, i.e., pumps or chemoattractants, setting insurmountable barriers to clinical adoption. Inspired by the natural filter-like capabilities of the female reproductive tract for sperm selection, a model-driven design, featuring pillar arrays that efficiently and noninvasively isolate highly motile and morphologically normal sperm, with lower epigenetic global methylation, from raw semen, is presented. The Simple Periodic ARray for Trapping And isolatioN (SPARTAN) created here modulates the directional persistence of sperm, increasing the spatial separation between progressive and nonprogressive motile sperm populations within an unprecedentedly short 10 min assay time. With over 99% motility of sorted sperm, a 5-fold improvement in morphology, 3-fold increase in nuclear maturity, and 2-4-fold enhancement in DNA integrity, SPARTAN offers to standardize sperm selection while eliminating operator-to-operator variations, centrifugation, and flow. SPARTAN can also be applied in other areas, including conservation ecology, breeding of farm animals, and design of flagellar microrobots for diagnostics.
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Affiliation(s)
- Thiruppathiraja Chinnasamy
- Bio‐Acoustic MEMS in Medicine (BAMM) LaboratoryCanary Center at Stanford for Cancer Early DetectionDepartment of RadiologyStanford School of MedicineStanford UniversityPalo AltoCA94304USA
| | - James L. Kingsley
- Department of PhysicsWorcester Polytechnic InstituteWorcesterMA01609USA
| | - Fatih Inci
- Bio‐Acoustic MEMS in Medicine (BAMM) LaboratoryCanary Center at Stanford for Cancer Early DetectionDepartment of RadiologyStanford School of MedicineStanford UniversityPalo AltoCA94304USA
| | | | - Mitchell P. Rosen
- Department of OBGYNUniversity of California San Francisco School of MedicineSan FranciscoCA94158USA
| | - Barry Behr
- Department of Obstetrics and GynecologySchool of MedicineStanford UniversityStanfordCA94305USA
| | - Erkan Tüzel
- Department of PhysicsWorcester Polytechnic InstituteWorcesterMA01609USA
| | - Utkan Demirci
- Bio‐Acoustic MEMS in Medicine (BAMM) LaboratoryCanary Center at Stanford for Cancer Early DetectionDepartment of RadiologyStanford School of MedicineStanford UniversityPalo AltoCA94304USA
- Department of Electrical Engineering (by courtesy)Stanford UniversityStanfordCA94305USA
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75
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Santi D, De Vincentis S, Magnani E, Spaggiari G. Impairment of sperm DNA methylation in male infertility: a meta-analytic study. Andrology 2018; 5:695-703. [PMID: 28718528 DOI: 10.1111/andr.12379] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 04/10/2017] [Accepted: 04/13/2017] [Indexed: 12/13/2022]
Abstract
Considering the widespread use of assisted reproductive techniques (ART), DNA methylation of specific genes involved in spermatogenesis achieves increasingly clinical relevance, representing a possible explanation of increased incidence of syndromes related to genomic imprinting in medically assisted pregnancies. Several trials suggested a relationship between male sub-fertility and sperm DNA methylation, although its weight on seminal parameters alteration is still a matter of debate. To evaluate whether aberrant sperm DNA methylation of imprinted genes is associated with impaired sperm parameters. Meta-analysis of controlled clinical trials evaluating imprinted genes sperm DNA methylation comparing men with idiopathic infertility to fertile controls. Twenty-four studies were included, allowing a meta-analytic evaluation for H19, MEST, SNRPN, and LINE-1. When a high heterogeneity of the results was demonstrated, the random effect model was used. H19 methylation levels resulted significantly lower in 879 infertile compared with 562 fertile men (7.53%, 95% CI: 5.14-9.93%, p < 0.001), suggesting a 9.91-fold higher risk ratio to show aberrant sperm DNA methylation (95% CI: 5.55-17.70, p < 0.001, I2 = 19%) in infertile men. The mean MEST methylation level was significantly higher in 846 infertile compared with 353 fertile men (3.35%, 95% CI: 1.41-5.29%, p < 0.001), as well as for SNRPN comparing 301 infertile men with 124 controls (3.23%, 95% CI: 0.75-5.72%, p < 0.001). LINE-1 methylation levels did not differ between 291 infertile men and 198 controls (0.44%, 95% CI: -2.04-1.16%, p = 0.63). The meta-analytic approach demonstrated that male infertility is associated with altered sperm methylation at H19, MEST, and SNRPN. Although its role in infertility remains unclear, sperm DNA methylation could be associated with the epigenetic risk in ART. In this setting, before proposing this analysis in clinical practice, an accurate identification of the most representative genes and a cost-effectiveness evaluation should be assessed in ad hoc prospective studies.
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Affiliation(s)
- D Santi
- Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy.,Unit of Endocrinology, Department of Medicine, Endocrinology, Metabolism and Geriatrics, Azienda OU of Modena, Modena, Italy
| | - S De Vincentis
- Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy.,Unit of Endocrinology, Department of Medicine, Endocrinology, Metabolism and Geriatrics, Azienda OU of Modena, Modena, Italy
| | - E Magnani
- Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy.,Unit of Endocrinology, Department of Medicine, Endocrinology, Metabolism and Geriatrics, Azienda OU of Modena, Modena, Italy
| | - G Spaggiari
- Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy.,Unit of Endocrinology, Department of Medicine, Endocrinology, Metabolism and Geriatrics, Azienda OU of Modena, Modena, Italy
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76
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Alkhaled Y, Laqqan M, Tierling S, Lo Porto C, Amor H, Hammadeh ME. Impact of cigarette-smoking on sperm DNA methylation and its effect on sperm parameters. Andrologia 2018; 50:e12950. [PMID: 29315717 DOI: 10.1111/and.12950] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/01/2017] [Indexed: 12/15/2022] Open
Abstract
DNA methylation is an epigenetic modification of the genome. The purpose of this study was to determine the influence of cigarette-smoking on sperm DNA methylation from a genomewide survey of sperm samples and to ascertain its effect on sperm parameters. Twenty-eight sperm DNA samples (from 14 fertile smokers as a case study and 14 proven fertile nonsmokers as controls) were subjected to Infinium 450K BeadChip arrays to identify the changes in the DNA methylation level between the two groups. Then, deep bisulphite sequencing was used to validate five CpGs on 78 samples. The results from the Infinium 450K found that only 11 CpGs showed a significant difference in DNA methylation between the case and the control groups. Five CpGs of the eleven (cg00648582, cg0932376, cg19169023, cg23841288 and cg27391564) underwent deep bisulphite sequencing where cg00648582, related to the PGAM5 gene, and the cg23841288 CpGs, related to the PTPRN2 gene amplicons, showed a significant increase in their DNA methylation level in more than one CpG in the case group. In contrast, a significant decrease was found at cg19169023 and at its various neighbouring CpGs in the TYRO3 gene-related amplicons. Furthermore, this study demonstrated a significant correlation between the variation in sperm DNA methylation level and standard sperm parameters in the case group.
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Affiliation(s)
- Y Alkhaled
- Department of Obstetrics & Gynecology, University of Saarland, Saarbrucken, Germany
| | - M Laqqan
- Department of Obstetrics & Gynecology, University of Saarland, Saarbrucken, Germany
| | - S Tierling
- FR8.3 Life Science, Department of Genetics & Epigenetics, Saarland University, Saarbrucken, Germany
| | - C Lo Porto
- FR8.3 Life Science, Department of Genetics & Epigenetics, Saarland University, Saarbrucken, Germany
| | - H Amor
- Department of Obstetrics & Gynecology, University of Saarland, Saarbrucken, Germany
| | - M E Hammadeh
- Department of Obstetrics & Gynecology, University of Saarland, Saarbrucken, Germany
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77
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Laqqan M, Hammadeh ME. Alterations in DNA methylation patterns and gene expression in spermatozoa of subfertile males. Andrologia 2017; 50. [DOI: 10.1111/and.12934] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2017] [Indexed: 02/06/2023] Open
Affiliation(s)
- M. Laqqan
- Department of Obstetrics & Gynecology; Assisted Reproduction Laboratory; Saarland University; Homburg Germany
| | - M. E. Hammadeh
- Department of Obstetrics & Gynecology; Assisted Reproduction Laboratory; Saarland University; Homburg Germany
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78
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Guo W, Xie B, Xiong S, Liang X, Gui JF, Mei J. miR-34a Regulates Sperm Motility in Zebrafish. Int J Mol Sci 2017; 18:E2676. [PMID: 29232857 PMCID: PMC5751278 DOI: 10.3390/ijms18122676] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 11/29/2017] [Accepted: 12/07/2017] [Indexed: 01/03/2023] Open
Abstract
Increasing attention has been focused on the role of microRNAs in post-transcription regulation during spermatogenesis. Recently, the miR-34 family has been shown to be involved in the spermatogenesis, but the clear function of the miR-34 family in spermatogenesis is still obscure. Here we analyzed the function of miR-34a, a member of the miR-34 family, during spermatogenesis using miR-34a knockout zebrafish generated by the clustered regularly interspaced short palindromic repeats/associated protein 9 (CRISPR/Cas9) system. miR-34a knockout zebrafish showed no obvious defects on testis morphology and sperm quantity. However, we found a significant increase in progressive sperm motility that is one of the pivotal factors influencing in vitro fertilization rates, in the knockout zebrafish. Moreover, breeding experiments showed that, when miR-34a-knockout male zebrafish mated with the wide-type females, they had a higher fertilization rate than did the wide-type males. Glycogen synthase kinase-3a (gsk3a), a potential sperm motility regulatory gene was predicted to be targeted by miR-34a, which was further supported by luciferase reporter assays, since a significant decrease of luciferase activity was detected upon ectopic overexpression of miR-34a. Our findings suggest that miR-34a downregulates gsk3a by targeting its 3' untranslated region, and miR-34a/gsk3a interaction modulates sperm motility in zebrafish. This study will help in understanding in the role of the miR-34 family during spermatogenesis and will set paths for further studies.
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Affiliation(s)
- Wenjie Guo
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Binyue Xie
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Shuting Xiong
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Xufang Liang
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jian-Fang Gui
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Wuhan 430072, China.
| | - Jie Mei
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.
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79
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Laqqan M, Tierling S, Alkhaled Y, LoPorto C, Hammadeh ME. Alterations in sperm DNA methylation patterns of oligospermic males. Reprod Biol 2017; 17:396-400. [DOI: 10.1016/j.repbio.2017.10.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 10/28/2017] [Accepted: 10/28/2017] [Indexed: 12/12/2022]
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80
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Laqqan M, Hammadeh ME. Aberrations in sperm DNA methylation patterns of males suffering from reduced fecundity. Andrologia 2017; 50. [PMID: 29072328 DOI: 10.1111/and.12913] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/20/2017] [Indexed: 01/06/2023] Open
Abstract
The purpose of this study was to evaluate the aberrations in sperm DNA methylation patterns of males suffering from reduced fecundity. A total of 108 males (65 males suffering from reduced fecundity as cases and 43 proven fertile males as a control) were included in the study. Thirty samples were subjected to 450K arrays as a screening phase, and then, three CpG sites located in the following genes: TYRO3, CGβ and FAM189A1 were selected to validate on 78 samples using deep bisulphite sequencing. A significant difference in the methylation level was found between cases and controls at all CpGs in TYRO3 gene-related amplicon (CpG1, p ≤ .003, CpG2, p ≤ .0001, CpG3, p ≤ .003 and CpG4, p ≤ .030) and CpG1 in CGβ gene-related amplicon (p ≤ .0001). Besides, a significant difference was found at two CpGs (CpG1, p ≤ .004 and CpG2, p ≤ .002) tested in the FAM189A1 gene-related amplicon. A significant correlation was found between the methylation level at CpG1 in the FAM189A1 gene and the different types of sperm motility. In conclusion, an alteration in the methylation levels of sperm DNA from males with reduced fecundity was showed. In addition, a relationship between variations in the methylation level of these CpGs and sperm motility has been observed.
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Affiliation(s)
- M Laqqan
- Department of Obstetrics & Gynecology, Assisted Reproduction Laboratory, Saarland University, Homburg, Germany
| | - M E Hammadeh
- Department of Obstetrics & Gynecology, Assisted Reproduction Laboratory, Saarland University, Homburg, Germany
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81
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Lambert S, Blondin P, Vigneault C, Labrecque R, Dufort I, Sirard MA. Spermatozoa DNA methylation patterns differ due to peripubertal age in bulls. Theriogenology 2017; 106:21-29. [PMID: 29031946 DOI: 10.1016/j.theriogenology.2017.10.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 10/03/2017] [Accepted: 10/04/2017] [Indexed: 12/11/2022]
Abstract
In the dairy industry, using semen as soon as the bull is mature enough to produce it is advantageous for breeding purposes. Mammalian spermatogenesis is a hormone-dependent developmental program in which a complex cascade of events must take place to ensure that germ cells reach the proper stage of development at the proper time. Conventional indicators of semen quality such as sperm cell motility and viability usually improve as bulls mature, meeting quality criteria satisfactorily at around 16 months. Using semen before that age may affect embryo viability, but other changes occurring during the peripubertal period should be considered. Although it is known that establishment of these patterns begins during foetal life, the extent to which sperm cell DNA methylation changes during puberty has not been studied. The aim of this study is to correlate the age of a young bull with the overall DNA methylation pattern of its spermatozoa. Spermatozoa were collected from bulls at the ages of 10 months (early pubertal), 12 months (late pubertal) and 16 months (pubertal). Each animal (n = 4) was compared to itself with 16 months as control. Genome-wide DNA methylation was analyzed by microarray using the EmbryoGENE DNA Methylation Analysis platform. Using a fold change over 1.5 and a 5% FDR p-value correction, a total of 2602 differently methylated regions were found in common between 10 months of age and 16 months of age. No differently methylated regions between 12 months and 16 months of age were found at the same level of statistical significance. We conclude that spermatozoa from bulls aged 10 months have a different epigenetic profile, which could compromise their value.
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Affiliation(s)
- Simon Lambert
- Centre de recherche en reproduction, développement et santé intergénérationnelle, Faculté des sciences de l'agriculture et de l'alimentation, Département des sciences animales, Pavillon des services, Université Laval, Québec, QC G1V 0A6, Canada
| | | | | | | | - Isabelle Dufort
- Centre de recherche en reproduction, développement et santé intergénérationnelle, Faculté des sciences de l'agriculture et de l'alimentation, Département des sciences animales, Pavillon des services, Université Laval, Québec, QC G1V 0A6, Canada
| | - Marc-André Sirard
- Centre de recherche en reproduction, développement et santé intergénérationnelle, Faculté des sciences de l'agriculture et de l'alimentation, Département des sciences animales, Pavillon des services, Université Laval, Québec, QC G1V 0A6, Canada.
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82
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Bronson R, Mikhailik A, Schwedes J, Gnatenko D, Hatchwell E. Detection of candidate nectin gene mutations in infertile men with severe teratospermia. J Assist Reprod Genet 2017; 34:1295-1302. [PMID: 28689229 PMCID: PMC5633573 DOI: 10.1007/s10815-017-0985-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 06/16/2017] [Indexed: 11/29/2022] Open
Abstract
PURPOSE Approximately 40% of infertile men have an abnormal semen analysis, resulting from either abnormalities of sperm production (defective spermatogenesis) or sperm shape (defective spermiogenesis). This latter process is dependent upon the function of Sertoli cells, which maintain specialized junctional complexes with germ cells. Nectins, members of the immunoglobulin superfamily, participate in formation of these dynamic complexes. Male mice in which the nectin-2 or nectin-3 gene is knocked out are sterile. Their spermatozoa exhibit severe teratospermia, altered motility, and an impaired ability to fertilize eggs. We asked whether mutations in the protein coding regions of the nectin-2 (aka PVRL2) and nectin-3 (aka PVRL3) genes could be detected in men from infertile couples whose semen analysis revealed unimpaired sperm production, judged by normal sperm concentration, but severe abnormalities in sperm shape. METHODS Ejaculates were snap frozen in liquid nitrogen and later submitted for Sanger analysis of these two genes, to detect mutations in their protein coding regions. RESULTS Eighty-nine of 455 ejaculates (19.5%) met the inclusion criteria for study. Two of the 56 samples that were successfully analyzed for nectin-2 (3.6%) and one of 73 (1.3%) analyzed for nectin-3 possessed possibly damaging mutations. CONCLUSIONS Despite the small-scale nature of the study, at least two low-frequency deleterious variants were identified. These results suggest the need for a larger-scale study of sequence variants in the nectins in severe teratospermia.
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Affiliation(s)
- Richard Bronson
- Department of Obstetrics, Gynecology and Reproductive Medicine, Stony Brook University Medical Center, T9-080, Stony Brook, NY, 11794-8091, USA.
| | - Anatoly Mikhailik
- Department of Anesthesiology, 370 Centers for Molecular Medicine, Stony Brook, NY, 11794-5140, USA
| | - John Schwedes
- Genomics Core Facility, Stony Brook University Medical Center, Room 151, Level 5 Basic Sciences Tower, Stony Brook, NY, 11794-8085, USA
| | - Dimitri Gnatenko
- Genomics Core Facility, Stony Brook University Medical Center, Room 151, Level 5 Basic Sciences Tower, Stony Brook, NY, 11794-8085, USA
| | - Eli Hatchwell
- Department of Pathology, Stony Brook University Medical Center, Stony Brook, NY, 11794, USA
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83
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Laqqan M, Solomayer EF, Hammadeh M. Aberrations in sperm DNA methylation patterns are associated with abnormalities in semen parameters of subfertile males. Reprod Biol 2017; 17:246-251. [DOI: 10.1016/j.repbio.2017.05.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 05/15/2017] [Accepted: 05/18/2017] [Indexed: 01/07/2023]
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84
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Rajabi H, Mohseni-Kouchesfehani H, Salehi M, Farifteh-Nobijari F, Eslami-Arshaghi T. The influence of semen quality on male pronucleus demethylation process during ICSI cycle. Syst Biol Reprod Med 2017; 63:341-349. [PMID: 28841339 DOI: 10.1080/19396368.2017.1368735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
There is growing evidence that the spermatozoon's epigenetic structure is of the utmost importance in the health of the future embryo. Following fertilization, sperm chromatin undergoes epigenetic reprogramming including DNA demethylation and remethylation, which resets gene expression. In some infertile patients, it is inevitable that sperm cells that are not within the range of normal human sperm parameters will be used for intracytoplasmic sperm injection. Understanding the relationship between the human sperm parameters and male pronucleus DNA demethylation seems necessary. We hypothesized that demethylation of the male pronucleus might be altered in zygotes conceived from a spermatozoa obtained from a sample exhibiting an abnormal semen analysis profile. To test the hypothesis, sperm cells from normal and abnormal human semen samples were injected into mouse oocytes. A group of cultured zygotes was fixed before the onset of DNA demethylation and the other group was fixed after DNA demethylation. Both groups were then labeled with a 5 methylcytosine antibody and the level of pronuclei methylation was detected as a function of fluorescent intensity. The level of demethylation was then determined as the difference between 5 methylcytosine fluorescent intensity before and after DNA demethylation. A negative correlation (p<0.05) was observed between sperm motility, morphology, percentage of head defects, protamine deficiency, and DNA demethylation level. However, no correlation was found between the demethylation level and sperm count. In conclusion, these observations suggest that demethylation is altered in the male pronucleus when low quality sperm samples are used.
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Affiliation(s)
- Hoda Rajabi
- a Department of Animal Biology, Faculty of Biological Sciences , Kharazmi University , Tehran , Iran
| | | | - Mohammad Salehi
- b Infertility and Reproductive Health Research Center, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Fattaneh Farifteh-Nobijari
- c Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences , Tehran , Iran
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85
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Cornet D, Cohen M, Clement A, Amar E, Fournols L, Clement P, Neveux P, Ménézo Y. Association between the MTHFR-C677T isoform and structure of sperm DNA. J Assist Reprod Genet 2017; 34:1283-1288. [PMID: 28842818 DOI: 10.1007/s10815-017-1015-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/01/2017] [Indexed: 10/19/2022] Open
Abstract
PURPOSE The aim of this study is to evaluate whether the MTHFR contribution to male decreased fertility can be attributable to anomalies in sperm nucleus DNA structure in relation to defective methylation. METHODS The presence of MTHFR C677T, contributing at most for male infertility, was determined from a venous blood sample, using real-time polymerase chain reaction (PCR). Sperm DNA fragmentation (SDF) and sperm nucleus decondensation index (SDI) measurements were performed using acridine orange and flow cytometry. SDF and SDI of men MTHFR C677T heterozygous or homozygous were compared to a general population of hypo-fertile patients RESULTS: SDF is not increased either in homozygous or heterozygous carriers of MTHFR C677T. In contrast, SDI is increased with a higher incidence in homozygous (p = 0.0006) than in heterozygous (p = 0.029) patients when compared with the control population. Using a critical threshold of 20% for either SDI or SDF assayed with our technique, the percentage of patients with results higher than this value is not significant with respect to fragmentation (0.128), but is significantly increased for decondensation (0.0003). CONCLUSIONS Defective methylation linked to MTHFR may contribute to sperm pathogenesis via increased SDI. After DNA structure analysis, especially SDI, treatment with 5-methyl tetrahydrofolate (MTHF), the metabolite downstream from the action of MTHFR, should be recommended as a therapeutic approach. Patients with a high SDI should be tested for MTHFR isoforms as part of a healthcare policy.
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Affiliation(s)
| | | | - Arthur Clement
- Laboratoire Clement, Avenue d'Eylau, 75016, Paris, France
| | - Edouard Amar
- American Hospital, 92200, Neuilly sur Seine, France
| | | | | | - Paul Neveux
- Centre Hospitalo Univesitaire d'Angers, 49000, Angers, France
| | - Yves Ménézo
- Laboratoire Clement, Avenue d'Eylau, 75016, Paris, France. .,American Hospital, 92200, Neuilly sur Seine, France. .,Centre Hospitalo Univesitaire d'Angers, 49000, Angers, France. .,London Fertility Associates, Harley St, London, UK.
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86
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Garcia T, Schreiber E, Kumar V, Prasad R, Sirvent JJ, Domingo JL, Gómez M. Effects on the reproductive system of young male rats of subcutaneous exposure to n-butylparaben. Food Chem Toxicol 2017; 106:47-57. [DOI: 10.1016/j.fct.2017.05.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 05/10/2017] [Accepted: 05/14/2017] [Indexed: 12/20/2022]
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87
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Laqqan M, Solomayer EF, Hammadeh M. Association between alterations in DNA methylation level of spermatozoa at CpGs dinucleotide and male subfertility problems. Andrologia 2017; 50. [DOI: 10.1111/and.12832] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2017] [Indexed: 01/01/2023] Open
Affiliation(s)
- M. Laqqan
- Gynecology & Assisted Reproduction Laboratory; Department of Obstetrics; Saarland University; Saarland Germany
| | - E. F. Solomayer
- Gynecology & Assisted Reproduction Laboratory; Department of Obstetrics; Saarland University; Saarland Germany
| | - M. Hammadeh
- Gynecology & Assisted Reproduction Laboratory; Department of Obstetrics; Saarland University; Saarland Germany
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88
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Laqqan M, Tierling S, Alkhaled Y, Lo Porto C, Solomayer EF, Hammadeh M. Spermatozoa from males with reduced fecundity exhibit differential DNA methylation patterns. Andrology 2017; 5:971-978. [DOI: 10.1111/andr.12362] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/06/2017] [Accepted: 03/09/2017] [Indexed: 01/30/2023]
Affiliation(s)
- M. Laqqan
- Department of Obstetrics & Gynecology; Assisted Reproduction Laboratory; Saarland University; Homburg/Saar Germany
| | - S. Tierling
- Life Science; Department of Genetics & Epigenetics; Saarland University; Saarbrücken Germany
| | - Y. Alkhaled
- Department of Obstetrics & Gynecology; Assisted Reproduction Laboratory; Saarland University; Homburg/Saar Germany
| | - C. Lo Porto
- Life Science; Department of Genetics & Epigenetics; Saarland University; Saarbrücken Germany
| | - E. F. Solomayer
- Department of Obstetrics & Gynecology; Assisted Reproduction Laboratory; Saarland University; Homburg/Saar Germany
| | - M. Hammadeh
- Department of Obstetrics & Gynecology; Assisted Reproduction Laboratory; Saarland University; Homburg/Saar Germany
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89
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De Oliveira RA, Budik S, Aurich C. Influence of partial or total replacement of glycerol by alternative cryoprotectants in Ghent freezing extender on post-thaw sperm quality in stallions. Reprod Domest Anim 2017; 52:715-721. [DOI: 10.1111/rda.12970] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 02/19/2017] [Indexed: 12/14/2022]
Affiliation(s)
- RA De Oliveira
- Artificial Insemination and Embryo Transfer; Vetmeduni Vienna; Vienna Austria
| | - S Budik
- Artificial Insemination and Embryo Transfer; Vetmeduni Vienna; Vienna Austria
| | - C Aurich
- Artificial Insemination and Embryo Transfer; Vetmeduni Vienna; Vienna Austria
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90
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Lestari SW, Rizki MD. Epigenetic: A new approach to etiology of infertility. MEDICAL JOURNAL OF INDONESIA 2017. [DOI: 10.13181/mji.v25i4.1504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Infertility is a complex disease which could be caused by male and female factors. The etiology from both factors needs further study. There are some approaches to understanding the etiology of infertility, one of them is epigenetic. Epigenetic modifications consist of DNA methylation, histone modifications, and chromatin remodelling. Male and female germinal cells undergo epigenetic modifications dynamically during differentiation into matured sperm and oocyte cells. In a male, the alteration of DNA methylation in spermatogenesis will cause oligo/asthenozoospermia. In addition, the histone methylation, acetylation, or other histone modification may lead sperm lose its ability to fertilize oocyte. Similarly, in a female, the alteration of DNA methylation and histone modification affects oogenesis, created aneuploidy in fertilized oocytes and resulted in embryonic death in the uterus. Alteration of these epigenetic modification patterns will cause infertility, both in male and female.
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91
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de Oliveira RA, Scarlet D, Ille N, Aurich C. Cooled-storage of equine semen does not induce major changes in sperm DNA methylation. Theriogenology 2016; 89:289-294. [PMID: 28043365 DOI: 10.1016/j.theriogenology.2016.11.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/11/2016] [Accepted: 11/12/2016] [Indexed: 01/11/2023]
Abstract
A decrease in fertility of equine semen during cooled-storage so far has mainly been attributed to changes in sperm membrane function. In the present study we hypothesized that cooled-storage also changes the sperm DNA methylation level. For this purpose, semen was collected from 10 fertile stallions and processed for cooled-storage at 5 °C. Two final concentrations, 50 × 106 and 100 × 106 cells/mL, were used. Semen was analyzed for total motility, progressive motility, membrane integrity, phosphatidylserine translocation (PST), mitochondrial membrane potential and chromatin condensation, immediately after processing and at 24 h-intervals until 72 h of storage. DNA cytosine methylation was assessed by ELISA after DNA extraction and denaturation. DNA methylation did neither change over time nor was affected by semen concentration. Total motility, progressive motility, membrane integrity, PST, mitochondrial membrane potential and chromatin condensation changed over storage time, but no differences between semen concentrations could be demonstrated. The results demonstrate that cooled-storage of equine semen does not induce changes in sperm DNA cytosine methylation. In cooled-semen of good quality, a concentration of 100 × 106 sperm/mL does not affect semen longevity. It can be concluded that a better fertility of cooled-stored than cryopreserved stallion semen is at least in part a result of only minor influences of cooled-storage on DNA integrity and methylation.
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Affiliation(s)
| | - Dragos Scarlet
- Obstetrics, Gynaecology, and Andrology, Vetmeduni, Vienna, Austria
| | - Natascha Ille
- Centre for Artificial Insemination and Embryo Transfer, Vetmeduni, Vienna, Austria
| | - Christine Aurich
- Centre for Artificial Insemination and Embryo Transfer, Vetmeduni, Vienna, Austria.
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92
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Aboulmaouahib S, Madkour A, Kaarouch I, Saadani B, Sefrioui O, Louanjli N, Copin H, Cadi R, Benkhalifa M. Effect of semen preparation technique and its incubation on sperm quality in the Moroccan population. Andrologia 2016; 49. [DOI: 10.1111/and.12688] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/25/2016] [Indexed: 02/02/2023] Open
Affiliation(s)
- S. Aboulmaouahib
- Laboratoire de Physiologie et Génétique Moléculaire (PGM); Département de Biologie; Faculté des Sciences Ain Chock; Université HASSAN II; Casablanca Morocco
- Labomac IVF Centers and Clinical Laboratory Medicine; Casablanca Morocco
| | - A. Madkour
- Labomac IVF Centers and Clinical Laboratory Medicine; Casablanca Morocco
- Biochemistry and Immunology Laboratory; Faculty of Sciences; Mohammed V University; Rabat Morocco
- Place de Nid Aux Iris; Clinique des Iris; IVF Center IRIFIV; Casablanca Morocco
- Private Clinic of Human Reproduction and Endoscopic Surgery; Anfa Fertility Center; Casablanca Morroco
| | - I. Kaarouch
- Labomac IVF Centers and Clinical Laboratory Medicine; Casablanca Morocco
- Biochemistry and Immunology Laboratory; Faculty of Sciences; Mohammed V University; Rabat Morocco
- Place de Nid Aux Iris; Clinique des Iris; IVF Center IRIFIV; Casablanca Morocco
- Private Clinic of Human Reproduction and Endoscopic Surgery; Anfa Fertility Center; Casablanca Morroco
| | - B. Saadani
- Place de Nid Aux Iris; Clinique des Iris; IVF Center IRIFIV; Casablanca Morocco
| | - O. Sefrioui
- Private Clinic of Human Reproduction and Endoscopic Surgery; Anfa Fertility Center; Casablanca Morroco
| | - N. Louanjli
- Labomac IVF Centers and Clinical Laboratory Medicine; Casablanca Morocco
| | - H. Copin
- Reproductive Biology and Medical Cytogenetics Laboratory; Regional University Hospital & School of Medicine; Picardie University Jules Verne; Amiens France
| | - R. Cadi
- Laboratoire de Physiologie et Génétique Moléculaire (PGM); Département de Biologie; Faculté des Sciences Ain Chock; Université HASSAN II; Casablanca Morocco
| | - M. Benkhalifa
- Reproductive Biology and Medical Cytogenetics Laboratory; Regional University Hospital & School of Medicine; Picardie University Jules Verne; Amiens France
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94
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Spermatogenesis in humans and its affecting factors. Semin Cell Dev Biol 2016; 59:10-26. [PMID: 27143445 DOI: 10.1016/j.semcdb.2016.04.009] [Citation(s) in RCA: 258] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/13/2016] [Accepted: 04/15/2016] [Indexed: 12/13/2022]
Abstract
Spermatogenesis is an extraordinary complex process. The differentiation of spermatogonia into spermatozoa requires the participation of several cell types, hormones, paracrine factors, genes and epigenetic regulators. Recent researches in animals and humans have furthered our understanding of the male gamete differentiation, and led to clinical tools for the better management of male infertility. There is still much to be learned about this intricate process. In this review, the critical steps of human spermatogenesis are discussed together with its main affecting factors.
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95
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Uppangala S, Mathai SE, Salian SR, Kumar D, Singh VJ, D’Souza F, Kalthur G, Kamath A, Adiga SK. Sperm Chromatin Immaturity Observed in Short Abstinence Ejaculates Affects DNA Integrity and Longevity In Vitro. PLoS One 2016; 11:e0152942. [PMID: 27043437 PMCID: PMC4820266 DOI: 10.1371/journal.pone.0152942] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 03/20/2016] [Indexed: 11/19/2022] Open
Abstract
Background The influence of ejaculatory abstinence (EA) on semen parameters and subsequent reproductive outcome is still debatable; hence understanding the impact of EA on sperm structural and functional integrity may provide a valuable information on predicting successful clinical outcome. Objective To understand the influence of EA on sperm chromatin maturity, integrity, longevity and global methylation status. Methods This experimental prospective study included 76 ejaculates from 19 healthy volunteers who provided ejaculates after observing 1, 3, 5 and 7 days of abstinence. Sperm chromatin maturity, DNA integrity and global methylation status were assessed in the neat ejaculate. Sperm motility, DNA integrity and longevity were assessed in the processed fraction of the fresh and frozen-thawed ejaculates to determine their association with the length of EA. Results Spermatozoa from 1 day ejaculatory abstinence (EA-1) displayed significantly higher level of sperm chromatin immaturity in comparison to EA-3 (P < 0.05) and EA-5 (P < 0.01) whereas; the number of 5-methyl cytosine immunostained spermatozoa did not vary significantly across groups. On the other hand, in vitro incubation of processed ejaculate from EA-1 resulted in approximately 20 and 40 fold increase in the DNA fragmented spermatozoa at the end of 6 and 24h respectively (P < 0.01–0.001). Conclusion Use of short-term EA for therapeutic fertilization would be a clinically valuable strategy to improve the DNA quality. However, use of such spermatozoa after prolonged incubation in vitro should be avoided as it can carry a substantial risk of transmitting DNA fragmentation to the oocytes.
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Affiliation(s)
- Shubhashree Uppangala
- Division of Clinical Embryology, Kasturba Medical College, Manipal University, Manipal-576104, India
| | - Sherine Eliza Mathai
- Division of Clinical Embryology, Kasturba Medical College, Manipal University, Manipal-576104, India
| | - Sujith Raj Salian
- Division of Clinical Embryology, Kasturba Medical College, Manipal University, Manipal-576104, India
| | - Dayanidhi Kumar
- Division of Clinical Embryology, Kasturba Medical College, Manipal University, Manipal-576104, India
| | - Vikram Jeet Singh
- Division of Clinical Embryology, Kasturba Medical College, Manipal University, Manipal-576104, India
| | - Fiona D’Souza
- Division of Clinical Embryology, Kasturba Medical College, Manipal University, Manipal-576104, India
| | - Guruprasad Kalthur
- Division of Clinical Embryology, Kasturba Medical College, Manipal University, Manipal-576104, India
| | - Asha Kamath
- Department of Community Medicine, Kasturba Medical College, Manipal University, Manipal-576104, India
| | - Satish Kumar Adiga
- Division of Clinical Embryology, Kasturba Medical College, Manipal University, Manipal-576104, India
- * E-mail:
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96
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The "omics" of human male infertility: integrating big data in a systems biology approach. Cell Tissue Res 2015; 363:295-312. [PMID: 26661835 DOI: 10.1007/s00441-015-2320-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 10/26/2015] [Indexed: 12/11/2022]
Abstract
Spermatogenesis is a complex process in which >2300 genes are temporally and spatially regulated to form a terminally differentiated sperm cell that must maintain the ability to contribute to a totipotent embryo which can successfully differentiate into a healthy individual. This process is dependent on fidelity of the genome, epigenome, transcriptome, and proteome of the spermatogonia, supporting cells, and the resulting sperm cell. Infertility and/or disease risk may increase in the offspring if abnormalities are present. This review highlights the recent advances in our understanding of these processes in light of the "omics revolution". We briefly review each of these areas, as well as highlight areas of future study and needs to advance further.
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97
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Du Y, Li M, Chen J, Duan Y, Wang X, Qiu Y, Cai Z, Gui Y, Jiang H. Promoter targeted bisulfite sequencing reveals DNA methylation profiles associated with low sperm motility in asthenozoospermia. Hum Reprod 2015; 31:24-33. [PMID: 26628640 DOI: 10.1093/humrep/dev283] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 10/20/2015] [Indexed: 01/18/2023] Open
Abstract
STUDY QUESTION Is there an association between sperm DNA methylation profiles and asthenozoospermia? SUMMARY ANSWER DNA methylation, at specific CpGs but not at the global level, was significantly different between low motile sperm cells of asthenozoospermic individuals and high motile sperm cells of normozoospermic controls. WHAT IS KNOWN ALREADY Aberrant DNA methylation, both globally and restricted to a specific gene locus, has been associated with male infertility and abnormal semen parameters. STUDY DESIGN, SIZE, DURATION This was a case-control study investigating the differences in DNA methylation at CpGs in promoter regions between high and low motile sperm cells from eight normozoospermic controls and seven asthenozoospermic patients. PARTICIPANTS/MATERIALS, SETTING, METHODS The liquid hybridization capture-based bisulfite sequencing method was used to determine DNA methylation at CpGs in promoter regions. The global inter-individual and intra-individual methylation variability were estimated by evaluating the methylation variance between and within different motile sperm fractions from the same or different individuals. Asthenozoospermia-associated differentially methylated or variable CpGs and differentially methylated regions were identified by comparing the DNA methylation of high motile sperm cells from normozoospermic controls with that of low motile sperm cells from asthenozoospermic patients. MAIN RESULTS AND THE ROLE OF CHANCE In this study, we determined the global DNA methylation level (24.7%), inter-individual variance (14.4%) and intra-individual differences between high and low motile sperm fractions (3.9%). We demonstrated that there were no statistically significant differences in either the global DNA methylation level or global methylation variability between sperm from men with normozoospermia or asthenozoospermia. Between high motile sperm from men with normozoospermia and low motile sperm from men with asthenozoospermia, we identified 134 differentially methylated CpGs, 41 differentially methylated regions and 134 differentially variable CpGs. The genomic distribution patterns of the differential methylation spectrum suggested that gene expression may be affected in low motile sperm cells of asthenozoospermic patients. Finally, through a functional analysis, we detected 16 differentially methylated or variable genes that are required for spermatogenesis and sperm motility or dominantly expressed in testis. LIMITATIONS, REASONS FOR CAUTION The sample size in this study was limited, although the participants in the two groups were carefully selected and well matched. Our results must be verified in larger cohorts with the use of different techniques. Furthermore, our results were descriptive, and follow-up studies will be needed to elucidate the effect of differential methylation profiles on asthenozoospermia. WIDER IMPLICATIONS OF THE FINDINGS Our study identified asthenozoospermia-associated DNA methylation profiles and proposed a list of genes, which were suggested to be involved in the regulation of sperm motility through an alteration of DNA methylation. These results will provide promising clues for understanding the effect of DNA methylation on sperm motility and asthenozoospermia. STUDY FUNDING/COMPETING INTERESTS This study was funded primarily by the National Natural Science Foundation of China, Shenzhen Project of Science and Technology and the National Basic Research Program of China. The authors have no competing interests.
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Affiliation(s)
- Ye Du
- Guangdong Key Laboratory of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, FuTian District, Shenzhen 518036, China
| | - Meiyan Li
- BGI-Shenzhen, Shenzhen 518083, China
| | - Jing Chen
- Guangdong Key Laboratory of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, FuTian District, Shenzhen 518036, China
| | - Yonggang Duan
- Guangdong Key Laboratory of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, FuTian District, Shenzhen 518036, China
| | | | - Yong Qiu
- BGI-Shenzhen, Shenzhen 518083, China
| | - Zhiming Cai
- Guangdong Key Laboratory of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, FuTian District, Shenzhen 518036, China
| | - Yaoting Gui
- Guangdong Key Laboratory of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, FuTian District, Shenzhen 518036, China
| | - Hui Jiang
- BGI-Shenzhen, Shenzhen 518083, China
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