Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions
STUDY QUESTION: Which are the main determinants, if any, of sperm DNA methylation levels? SUMMARY ANSWER: Geographical region resulted associated with the sperm methylation status assessed on genome-wide repetitive sequences. WHAT IS KNOWN ALREADY: DNA methylation level, assessed on repetitive seque...
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2014
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Online Access: | https://pure.au.dk/portal/en/publications/9a64da96-8ccd-438e-aa1d-cca1f81bb3c0 https://doi.org/10.1093/humrep/deu176 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/9a64da96-8ccd-438e-aa1d-cca1f81bb3c0 2024-02-11T10:04:26+01:00 Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions Consales, C Leter, G Bonde, J P E Toft, Gunnar Eleuteri, P Moccia, T Budillon, A Jönsson, B A G Giwercman, A Pedersen, H S Ludwicki, J K Zviezdai, V Heederik, D Spanò, M 2014-09 https://pure.au.dk/portal/en/publications/9a64da96-8ccd-438e-aa1d-cca1f81bb3c0 https://doi.org/10.1093/humrep/deu176 eng eng https://pure.au.dk/portal/en/publications/9a64da96-8ccd-438e-aa1d-cca1f81bb3c0 info:eu-repo/semantics/restrictedAccess Consales , C , Leter , G , Bonde , J P E , Toft , G , Eleuteri , P , Moccia , T , Budillon , A , Jönsson , B A G , Giwercman , A , Pedersen , H S , Ludwicki , J K , Zviezdai , V , Heederik , D & Spanò , M 2014 , ' Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions ' , Human reproduction (Oxford, England) , vol. 29 , no. 9 , pp. 2065-2072 . https://doi.org/10.1093/humrep/deu176 article 2014 ftuniaarhuspubl https://doi.org/10.1093/humrep/deu176 2024-01-17T23:59:17Z STUDY QUESTION: Which are the main determinants, if any, of sperm DNA methylation levels? SUMMARY ANSWER: Geographical region resulted associated with the sperm methylation status assessed on genome-wide repetitive sequences. WHAT IS KNOWN ALREADY: DNA methylation level, assessed on repetitive sequences from peripheral blood lymphocyte, can vary with age, gender, alcohol consumption and white blood cell counts. STUDY DESIGN, SIZE, DURATION: A cross-sectional study. Individual data were collected from 269 young healthy men of proven fertility living in three geographical regions: Inuits from Greenland, Caucasians from Warsaw (Poland) and Kharkiv (Ukraine). Semen samples were collected between May 2002 and February 2004 and aliquots were immediately frozen. PARTICIPANTS/MATERIALS, SETTING, METHODS: We estimated sperm DNA global methylation level (DGML) in two ways. First DNA methylation in repetitive DNA sequences (LINE-1, Satα and Alu) was quantified by PCR pyrosequencing after bisulfite conversion and second by flow cytometry (FCM) using fluorescently labeled monoclonal antibodies anti-5-methylcytosine. We analyzed whether personal characteristics and habits, body mass index, semen quality parameters, sperm chromatin integrity, biomarkers of accessory gland function and the plasma concentration of reproductive hormones were associated with sperm DNA methylation levels in men. Associations were evaluated by analysis of variance and linear regression analyses. MAIN RESULTS AND THE ROLE OF CHANCE: The geographical location emerged as the main determinant when using the methylation level in repetitive sequences. FCM DGML results were not associated with those from repetitive sequence analysis. No other consistent associations between methylation markers and the assessed variables were identified across countries. LIMITATIONS, REASONS FOR CAUTION: The methods used are only surrogates of the actual sperm methylome and the methylation levels at individual specific loci were not explored. WIDER IMPLICATIONS OF THE ... Article in Journal/Newspaper Greenland inuits Aarhus University: Research Greenland Human Reproduction 29 9 2065 2072 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
STUDY QUESTION: Which are the main determinants, if any, of sperm DNA methylation levels? SUMMARY ANSWER: Geographical region resulted associated with the sperm methylation status assessed on genome-wide repetitive sequences. WHAT IS KNOWN ALREADY: DNA methylation level, assessed on repetitive sequences from peripheral blood lymphocyte, can vary with age, gender, alcohol consumption and white blood cell counts. STUDY DESIGN, SIZE, DURATION: A cross-sectional study. Individual data were collected from 269 young healthy men of proven fertility living in three geographical regions: Inuits from Greenland, Caucasians from Warsaw (Poland) and Kharkiv (Ukraine). Semen samples were collected between May 2002 and February 2004 and aliquots were immediately frozen. PARTICIPANTS/MATERIALS, SETTING, METHODS: We estimated sperm DNA global methylation level (DGML) in two ways. First DNA methylation in repetitive DNA sequences (LINE-1, Satα and Alu) was quantified by PCR pyrosequencing after bisulfite conversion and second by flow cytometry (FCM) using fluorescently labeled monoclonal antibodies anti-5-methylcytosine. We analyzed whether personal characteristics and habits, body mass index, semen quality parameters, sperm chromatin integrity, biomarkers of accessory gland function and the plasma concentration of reproductive hormones were associated with sperm DNA methylation levels in men. Associations were evaluated by analysis of variance and linear regression analyses. MAIN RESULTS AND THE ROLE OF CHANCE: The geographical location emerged as the main determinant when using the methylation level in repetitive sequences. FCM DGML results were not associated with those from repetitive sequence analysis. No other consistent associations between methylation markers and the assessed variables were identified across countries. LIMITATIONS, REASONS FOR CAUTION: The methods used are only surrogates of the actual sperm methylome and the methylation levels at individual specific loci were not explored. WIDER IMPLICATIONS OF THE ... |
format |
Article in Journal/Newspaper |
author |
Consales, C Leter, G Bonde, J P E Toft, Gunnar Eleuteri, P Moccia, T Budillon, A Jönsson, B A G Giwercman, A Pedersen, H S Ludwicki, J K Zviezdai, V Heederik, D Spanò, M |
spellingShingle |
Consales, C Leter, G Bonde, J P E Toft, Gunnar Eleuteri, P Moccia, T Budillon, A Jönsson, B A G Giwercman, A Pedersen, H S Ludwicki, J K Zviezdai, V Heederik, D Spanò, M Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions |
author_facet |
Consales, C Leter, G Bonde, J P E Toft, Gunnar Eleuteri, P Moccia, T Budillon, A Jönsson, B A G Giwercman, A Pedersen, H S Ludwicki, J K Zviezdai, V Heederik, D Spanò, M |
author_sort |
Consales, C |
title |
Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions |
title_short |
Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions |
title_full |
Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions |
title_fullStr |
Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions |
title_full_unstemmed |
Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions |
title_sort |
indices of methylation in sperm dna from fertile men differ between distinct geographical regions |
publishDate |
2014 |
url |
https://pure.au.dk/portal/en/publications/9a64da96-8ccd-438e-aa1d-cca1f81bb3c0 https://doi.org/10.1093/humrep/deu176 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland inuits |
genre_facet |
Greenland inuits |
op_source |
Consales , C , Leter , G , Bonde , J P E , Toft , G , Eleuteri , P , Moccia , T , Budillon , A , Jönsson , B A G , Giwercman , A , Pedersen , H S , Ludwicki , J K , Zviezdai , V , Heederik , D & Spanò , M 2014 , ' Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions ' , Human reproduction (Oxford, England) , vol. 29 , no. 9 , pp. 2065-2072 . https://doi.org/10.1093/humrep/deu176 |
op_relation |
https://pure.au.dk/portal/en/publications/9a64da96-8ccd-438e-aa1d-cca1f81bb3c0 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1093/humrep/deu176 |
container_title |
Human Reproduction |
container_volume |
29 |
container_issue |
9 |
container_start_page |
2065 |
op_container_end_page |
2072 |
_version_ |
1790601018992492544 |