DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women
Several studies have found aberrant DNA methylation levels in breast cancer cases, but factors influencing DNA methylation patterns and the mechanisms are not well understood. This case-control study evaluated blood methylation level of two repetitive elements and selected breast cancer-related gene...
Published in: | Basic & Clinical Pharmacology & Toxicology |
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2020
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Online Access: | https://pure.au.dk/portal/da/publications/dna-methylation-level-in-blood-and-relations-to-breast-cancer-risk-factors-and-environmental-exposure-in-greenlandic-inuit-women(183aabaa-835e-4cdc-8423-848ad978ed8a).html https://doi.org/10.1111/bcpt.13424 https://pure.au.dk/ws/files/220258442/bcpt.13424.pdf |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/183aabaa-835e-4cdc-8423-848ad978ed8a 2023-05-15T15:09:30+02:00 DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women Wielsøe, Maria Tarantini, Letizia Bollati, Valentina Long, Manhai Bonefeld-Jørgensen, Eva Cecilie 2020-10 application/pdf https://pure.au.dk/portal/da/publications/dna-methylation-level-in-blood-and-relations-to-breast-cancer-risk-factors-and-environmental-exposure-in-greenlandic-inuit-women(183aabaa-835e-4cdc-8423-848ad978ed8a).html https://doi.org/10.1111/bcpt.13424 https://pure.au.dk/ws/files/220258442/bcpt.13424.pdf eng eng info:eu-repo/semantics/openAccess Wielsøe , M , Tarantini , L , Bollati , V , Long , M & Bonefeld-Jørgensen , E C 2020 , ' DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women ' , Basic & Clinical Pharmacology & Toxicology , vol. 127 , no. 4 , pp. 338-350 . https://doi.org/10.1111/bcpt.13424 CELL DNA COLORECTAL ADENOMA GENE HYPOMETHYLATION LEUKOCYTE DNA NEW-YORK SITE PERIPHERAL-BLOOD PERSISTENT ORGANIC POLLUTANTS PROMOTER HYPERMETHYLATION SISTERS DISCORDANT arctic inuit circadian genes repetitive elements tumour suppressor genes article 2020 ftuniaarhuspubl https://doi.org/10.1111/bcpt.13424 2022-12-28T23:55:39Z Several studies have found aberrant DNA methylation levels in breast cancer cases, but factors influencing DNA methylation patterns and the mechanisms are not well understood. This case-control study evaluated blood methylation level of two repetitive elements and selected breast cancer-related genes in relation to breast cancer risk, and the associations with serum level of persistent organic pollutants (POPs) and breast cancer risk factors in Greenlandic Inuit. DNA methylation was determined using bisulphite pyrosequencing in blood from 74 breast cancer cases and 80 controls. Using first tertile as reference, the following was observed. Positive associations for ATM in second tertile (OR: 2.33, 95% CI: 1.04; 5.23) and ESR2 in third tertile (OR: 2.22, 95% CI: 0.97; 5.05) suggest an increased breast cancer risk with high DNA methylation. LINE-1 methylation was lower in cases than controls. In third tertile (OR: 0.42, 95% CI: 0.18; 0.98), associations suggest in accordance with the literature an increased risk of breast cancer with LINE-1 hypomethylation. Among controls, significant associations between methylation levels and serum level of POPs and breast cancer risk factors (age, body mass index, cotinine level) were found. Thus, breast cancer risk factors and POPs may alter the risk through changes in methylation levels; further studies are needed to elucidate the mechanisms. Article in Journal/Newspaper Arctic greenlandic inuit Aarhus University: Research Arctic Basic & Clinical Pharmacology & Toxicology 127 4 338 350 |
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Open Polar |
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Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
CELL DNA COLORECTAL ADENOMA GENE HYPOMETHYLATION LEUKOCYTE DNA NEW-YORK SITE PERIPHERAL-BLOOD PERSISTENT ORGANIC POLLUTANTS PROMOTER HYPERMETHYLATION SISTERS DISCORDANT arctic inuit circadian genes repetitive elements tumour suppressor genes |
spellingShingle |
CELL DNA COLORECTAL ADENOMA GENE HYPOMETHYLATION LEUKOCYTE DNA NEW-YORK SITE PERIPHERAL-BLOOD PERSISTENT ORGANIC POLLUTANTS PROMOTER HYPERMETHYLATION SISTERS DISCORDANT arctic inuit circadian genes repetitive elements tumour suppressor genes Wielsøe, Maria Tarantini, Letizia Bollati, Valentina Long, Manhai Bonefeld-Jørgensen, Eva Cecilie DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women |
topic_facet |
CELL DNA COLORECTAL ADENOMA GENE HYPOMETHYLATION LEUKOCYTE DNA NEW-YORK SITE PERIPHERAL-BLOOD PERSISTENT ORGANIC POLLUTANTS PROMOTER HYPERMETHYLATION SISTERS DISCORDANT arctic inuit circadian genes repetitive elements tumour suppressor genes |
description |
Several studies have found aberrant DNA methylation levels in breast cancer cases, but factors influencing DNA methylation patterns and the mechanisms are not well understood. This case-control study evaluated blood methylation level of two repetitive elements and selected breast cancer-related genes in relation to breast cancer risk, and the associations with serum level of persistent organic pollutants (POPs) and breast cancer risk factors in Greenlandic Inuit. DNA methylation was determined using bisulphite pyrosequencing in blood from 74 breast cancer cases and 80 controls. Using first tertile as reference, the following was observed. Positive associations for ATM in second tertile (OR: 2.33, 95% CI: 1.04; 5.23) and ESR2 in third tertile (OR: 2.22, 95% CI: 0.97; 5.05) suggest an increased breast cancer risk with high DNA methylation. LINE-1 methylation was lower in cases than controls. In third tertile (OR: 0.42, 95% CI: 0.18; 0.98), associations suggest in accordance with the literature an increased risk of breast cancer with LINE-1 hypomethylation. Among controls, significant associations between methylation levels and serum level of POPs and breast cancer risk factors (age, body mass index, cotinine level) were found. Thus, breast cancer risk factors and POPs may alter the risk through changes in methylation levels; further studies are needed to elucidate the mechanisms. |
format |
Article in Journal/Newspaper |
author |
Wielsøe, Maria Tarantini, Letizia Bollati, Valentina Long, Manhai Bonefeld-Jørgensen, Eva Cecilie |
author_facet |
Wielsøe, Maria Tarantini, Letizia Bollati, Valentina Long, Manhai Bonefeld-Jørgensen, Eva Cecilie |
author_sort |
Wielsøe, Maria |
title |
DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women |
title_short |
DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women |
title_full |
DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women |
title_fullStr |
DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women |
title_full_unstemmed |
DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women |
title_sort |
dna methylation level in blood and relations to breast cancer, risk factors and environmental exposure in greenlandic inuit women |
publishDate |
2020 |
url |
https://pure.au.dk/portal/da/publications/dna-methylation-level-in-blood-and-relations-to-breast-cancer-risk-factors-and-environmental-exposure-in-greenlandic-inuit-women(183aabaa-835e-4cdc-8423-848ad978ed8a).html https://doi.org/10.1111/bcpt.13424 https://pure.au.dk/ws/files/220258442/bcpt.13424.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic greenlandic inuit |
genre_facet |
Arctic greenlandic inuit |
op_source |
Wielsøe , M , Tarantini , L , Bollati , V , Long , M & Bonefeld-Jørgensen , E C 2020 , ' DNA methylation level in blood and relations to breast cancer, risk factors and environmental exposure in Greenlandic Inuit women ' , Basic & Clinical Pharmacology & Toxicology , vol. 127 , no. 4 , pp. 338-350 . https://doi.org/10.1111/bcpt.13424 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/bcpt.13424 |
container_title |
Basic & Clinical Pharmacology & Toxicology |
container_volume |
127 |
container_issue |
4 |
container_start_page |
338 |
op_container_end_page |
350 |
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1766340683739693056 |