ArticleJournal of agricultural and food chemistry2024
Deciphering Mechanisms of Adipocyte Differentiation in Abdominal Fat of Broilers.
Article in Journal of agricultural and food chemistry, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Integrated multi-omics implicates the gut microbiota and bilirubin in abdominal fat deposition in Huainan yellow chickens.Poultry science · 2026Article
- Transcriptomic analysis identifies hub genes involved in age-dependent abdominal fat development in chickens.Poultry science · 2026Article
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Authors and funding
6 authors.
Funding
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Abstract
The excessive deposition of abdominal fat tissue (AFT) in broilers has emerged as a major concern in the poultry industry. Despite some progress in recent years, the molecular mechanisms underlying AFT development remain ambiguous. The current study combined RNA-seq with transposase-accessible chromatin sequencing (ATAC-seq) to map the dynamic profiling of chromatin accessibility and transcriptional reprogramming in AFT adipocyte differentiation in broilers at day 3 (D3) and D14. Our results found that the levels of CDK1 and PCNA were down-regulated at D14, D28, and D42 compared to D3, while the levels of C/EBPα and FABP4 were up-regulated at D14 and D42 compared to D3. Meanwhile, PPARγ was significantly up-regulated at D28 and D42. RNA-seq of AFT identified 1705 up-regulated and 1112 down-regulated differential expression genes (DEGs) between D3 and D14. Pathways based on up-regulated DEGs mainly enriched some pathways related to adipocyte differentiation, while down-regulated DEGs pointed to DNA replication, cell cycle, and gap junction. Gene set enrichment analysis (GSEA) revealed that DNA replication and the cell cycle were down-regulated at D14, while the insulin signaling pathway was up-regulated. In the OA-induced immortalized chicken preadipocyte (ICP2) model, protein dynamic changes were consistent with AFT from D3 to D14. Same pathways were enriched in ICP2. In addition, based on overlapped DEGs from AFT and ICP2, enriched pathways related to adipocyte differentiation or proliferation mentioned above were all involved. A total of 1600 gain and 16727 loss differential peaks (DPs) were identified in ICP2 by ATAC-seq. Predicted genes from DPs at the promoter regions were enriched in glycerophospholipid metabolism, TGF-β signaling, FoxO signaling, and ubiquitin-mediated proteolysis. DNA motifs predicted 159 transcription factors (TFs) based on gain and loss peaks from the promoter regions, where 1 and 10 TFs were overlapped with up or down TFs from DEGs. Overall, this study presents a framework for the comprehension of the epigenetic regulatory mechanisms of adipocyte differentiation and identifies candidate genes and potential TFs involved in AFT adipocyte differentiation in broilers.
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