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Genome-wide analysis of DNA methylation before- and after exercise in the thoroughbred horse with MeDIP-seq

  • Jeong An Gim
  • , Chang Pyo Hong
  • , Dae Soo Kim
  • , Jae Woo Moon
  • , Yuri Choi
  • , Jungwoo Eo
  • , Yun Jeong Kwon
  • , Ja Rang Lee
  • , Yi Deun Jung
  • , Jin Han Bae
  • , Bong Hwan Choi
  • , Junsu Ko
  • , Sanghoon Song
  • , Kung Ahn
  • , Hong Seok Ha
  • , Young Mok Yang
  • , Hak Kyo Lee
  • , Kyung Do Park
  • , Kyoung Tag Do
  • , Kyudong Han
  • Joo Mi Yi, Hee Jae Cha, Selvam Ayarpadikannan, Byung Wook Cho, Jong Bhak*, Heui Soo Kim
*Corresponding author for this work
  • Pusan National University
  • TBI
  • Korea Research Institute of Bioscience and Biotechnology
  • Rural Development Administration
  • Rutgers - The State University of New Jersey, New Brunswick
  • Konkuk University
  • Hankyong National University
  • Sorabol College
  • Dankook University
  • Dongnam Institute of Radiological and Medical Science (DIRAMS)
  • Kosin University
  • Ulsan National Institute of Science and Technology

Research output: Contribution to journalJournal articlepeer-review

Abstract

Athletic performance is an important criteria used for the selection of superior horses. However, little is known about exercise-related epigenetic processes in the horse. DNA methylation is a key mechanism for regulating gene expression in response to environmental changes. We carried out comparative genomic analysis of genome-wide DNA methylation profiles in the blood samples of two different thoroughbred horses before and after exercise by methylated-DNA immunoprecipitation sequencing (MeDIP- Seq). Differentially methylated regions (DMRs) in the pre- and post-exercise blood samples of superior and inferior horses were identified. Exercise altered the methylation patterns. After 30 min of exercise, 596 genes were hypo- methylated and 715 genes were hypermethylated in the superior horse, whereas in the inferior horse, 868 genes were hypomethylated and 794 genes were hypermethylated. These genes were analyzed based on gene ontology (GO) annotations and the exercise-related pathway patterns in the two horses were compared. After exercise, gene regions related to cell division and adhesion were hypermethylated in the superior horse, whereas regions related to cell signaling and transport were hypermethylated in the inferior horse. Analysis of the distribution of methylated CpG islands confirmed the hypomethylation in the gene-body methylation regions after exercise. The methylation patterns of transposable elements also changed after exercise. Long interspersed nuclear elements (LINEs) showed abundance of DMRs. Collectively, our results serve as a basis to study exercise- based reprogramming of epigenetic traits.

Original languageEnglish
Pages (from-to)210-220
Number of pages11
JournalMolecules and Cells
Volume38
Issue number3
DOIs
StatePublished - 2015

Keywords

  • DNA methylation
  • Exercise
  • MeDIP-Seq
  • Thoroughbred horse
  • Transposable elements

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