한빛사논문
Keun Hong Son 1,2,3†, Mark Borris D. Aldonza 1,2,3†, A-Reum Nam 1,2,3†, Kang-Hoon Lee 1,3‡, Jeong-Woon Lee 1,2,3, Kyung-Ju Shin 1,3§, Keunsoo Kang 4, Je-Yoel Cho 1,2,3*
1Department of Biochemistry, College of Veterinary Medicine, Seoul National University, Seoul, Korea.
2Comparative Medicine and Disease Research Center (CDRC), Science Research Center (SRC), Seoul National University, Seoul, Korea.
3BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea.
4Departmentof Microbiology, College of Natural Sciences, Dankook University, Cheonan, Korea.
†These authors contributed equally to this work.
*Corresponding author: correspondence to Je-Yoel Cho
‡Present address: GeneOne Life Science Inc., Seoul, Korea.
§Present address: Department of Biomedical Sciences, College of Medicine, Inha University, Incheon, Korea.
Abstract
Dogs have become a valuable model in exploring multifaceted diseases and biology relevant to human health. Despite large-scale dog genome projects producing high-quality draft references, a comprehensive annotation of functional elements is still lacking. We addressed this through integrative next-generation sequencing of transcriptomes paired with five histone marks and DNA methylome profiling across 11 tissue types, deciphering the dog’s epigenetic code by defining distinct chromatin states, super-enhancer, and methylome landscapes, and thus showed that these regions are associated with a wide range of biological functions and cell/tissue identity. In addition, we confirmed that the phenotype-associated variants are enriched in tissue-specific regulatory regions and, therefore, the tissue of origin of the variants can be traced. Ultimately, we delineated conserved and dynamic epigenomic changes at the tissue- and species-specific resolutions. Our study provides an epigenomic blueprint of the dog that can be used for comparative biology and medical research.
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