PMID- 36806924 OWN - NLM STAT- MEDLINE DCOM- 20230307 LR - 20230307 IS - 1879-3231 (Electronic) IS - 0093-691X (Linking) VI - 200 DP - 2023 Apr 1 TI - Extremely low-frequency electromagnetic field (ELF-EMF) induces alterations in epigenetic regulation in the myometrium - An in vitro study. PG - 136-146 LID - S0093-691X(23)00042-0 [pii] LID - 10.1016/j.theriogenology.2023.02.005 [doi] AB - Previous research by the authors indicated that an extremely low-frequency electromagnetic field (ELF-EMF) evokes molecular alterations in the porcine myometrium. It was hypothesized that the ELF-EMF could induce alterations in the epigenetic regulation of gene expression in the myometrium. In the current study, slices of the porcine myometrium during the peri-implantation period (n = 4) were used for further in vitro exposition to ELF-EMF (50 Hz, 8 mT, 2 h treatment duration). The study tested whether the ELF-EMF may affect: 1/the expression of DNA (cytosine-5)-methyltransferase 1 (DNMT1) and DNA (cytosine-5)-methyltransferase 3a (DNMT3a), 2/the level of genomic DNA methylation, and 3/the level of amplification of methylated and unmethylated variants of promoter regions of selected genes with altered expression in response to ELF-EMF. It was found that ELF-EMF treatment increased DNMT1, decreased DNMT3a mRNA transcript and protein abundance, and increased the level of genomic DNA methylation. The direction of alterations in the level of amplification of methylated and unmethylated variants of the promoter region of selected genes with altered expression, i.e. prodynorphin (PDYN), interleukin 15 (IL15) signal transducer and activator of transcription 5A (STAT5A), tumor necrosis factor (TNF), and between down-regulated genes were early growth response 2 (EGR2), hyaluronan and proteoglycan link protein 1 (HAPLN1), and uteroferrin associated basic protein-2 (UABP2), mostly involving the direction of changes in their transcriptional activity, which was evaluated in a previous study by the authors. Thus, ELF-EMF radiation disturbs epigenetic mechanisms, which may underlay ELF-EMF-related transcriptomic alterations in the myometrium. CI - Copyright (c) 2023 Elsevier Inc. All rights reserved. FAU - Franczak, Anita AU - Franczak A AD - Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10- 719, Olsztyn, Poland. Electronic address: anitaf@uwm.edu.pl. FAU - Drzewiecka, Ewa Monika AU - Drzewiecka EM AD - Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10- 719, Olsztyn, Poland. Electronic address: e.drzewiecka@pan.olsztyn.pl. FAU - Kozlowska, Wiktoria AU - Kozlowska W AD - Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10- 719, Olsztyn, Poland. FAU - Zmijewska, Agata AU - Zmijewska A AD - Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10- 719, Olsztyn, Poland. FAU - Wydorski, Pawel Jozef AU - Wydorski PJ AD - Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10- 719, Olsztyn, Poland. LA - eng PT - Journal Article DEP - 20230207 PL - United States TA - Theriogenology JT - Theriogenology JID - 0421510 RN - 9007-49-2 (DNA) SB - IM MH - Female MH - Animals MH - Swine MH - *Myometrium MH - *Electromagnetic Fields MH - Epigenesis, Genetic MH - DNA MH - Gene Expression Profiling/veterinary OTO - NOTNLM OT - DNA methylation OT - Electromagnetic field OT - Epigenetic regulation OT - Methyltransferases OT - Myometrium EDAT- 2023/02/23 06:00 MHDA- 2023/03/08 06:00 CRDT- 2023/02/22 11:07 PHST- 2022/11/03 00:00 [received] PHST- 2023/01/16 00:00 [revised] PHST- 2023/02/04 00:00 [accepted] PHST- 2023/02/23 06:00 [pubmed] PHST- 2023/03/08 06:00 [medline] PHST- 2023/02/22 11:07 [entrez] AID - S0093-691X(23)00042-0 [pii] AID - 10.1016/j.theriogenology.2023.02.005 [doi] PST - ppublish SO - Theriogenology. 2023 Apr 1;200:136-146. doi: 10.1016/j.theriogenology.2023.02.005. Epub 2023 Feb 7.