Institute of Genome Biology, Research Institute for Farm Animal Biology (FBN), Dummerstorf, Germany.
Program in Applied Biological Sciences: Environmental Health, Chulabhorn Graduate Institute, 906 Kamphaeng Phet 6 Road, Lak-Si, Bangkok, Thailand.
Epigenetics. 2024 Dec;19(1):2375011. doi: 10.1080/15592294.2024.2375011. Epub 2024 Jul 2.
Mesenchymal stem cells (MSCs), with the ability to differentiate into osteoblasts, adipocytes, or chondrocytes, show evidence that the donor cell's metabolic type influences the osteogenic process. Limited knowledge exists on DNA methylation changes during osteogenic differentiation and the impact of diverse donor genetic backgrounds on MSC differentiation. In this study, synovial membrane mesenchymal stem cells (SMSCs) from two pig breeds (Angeln Saddleback, AS; German Landrace, DL) with distinct metabolic phenotypes were isolated, and the methylation pattern of SMSCs during osteogenic induction was investigated. Results showed that most differentially methylated regions (DMRs) were hypomethylated in osteogenic-induced SMSC group. These DMRs were enriched with genes of different osteogenic signalling pathways at different time points including Wnt, ECM, TGFB and BMP signalling pathways. AS pigs consistently exhibited a higher number of hypermethylated DMRs than DL pigs, particularly during the peak of osteogenesis (day 21). Predicting transcription factor motifs in regions of DMRs linked to osteogenic processes and donor breeds revealed influential motifs, including , and . These findings contribute to understanding the pattern of methylation changes promoting osteogenic differentiation, emphasizing the substantial role of donor the metabolic type and epigenetic memory of different donors on SMSC differentiation.
间充质干细胞(MSCs)具有分化为成骨细胞、脂肪细胞或软骨细胞的能力,有证据表明供体细胞的代谢类型影响成骨过程。目前对于成骨分化过程中的 DNA 甲基化变化以及不同供体遗传背景对 MSC 分化的影响知之甚少。在这项研究中,从两种代谢表型明显不同的猪品种(安格恩萨德尔巴克猪,AS;德国长白猪,DL)中分离出滑膜间充质干细胞(SMSCs),并研究了 SMSCs 在成骨诱导过程中的甲基化模式。结果表明,大多数差异甲基化区域(DMRs)在成骨诱导的 SMSC 组中呈低甲基化状态。这些 DMRs 在不同时间点富集了不同成骨信号通路的基因,包括 Wnt、ECM、TGFB 和 BMP 信号通路。与 DL 猪相比,AS 猪在成骨高峰期(第 21 天)始终表现出更多的高甲基化 DMRs。预测与成骨过程和供体品种相关的 DMR 区域中的转录因子基序揭示了有影响力的基序,包括 、 和 。这些发现有助于理解促进成骨分化的甲基化变化模式,强调了供体代谢类型和不同供体的表观遗传记忆对 SMSC 分化的重要作用。