文献类型: 外文期刊
作者: Zhang, Pengpeng 1 ; Sheng, Mingxuan 1 ; Du, Chunyu 1 ; Chao, Zhe 2 ; Xu, Haixia 1 ; Cheng, Xiaofang 1 ; Li, Cencen 1 ; Xu 1 ;
作者机构: 1.Xinyang Normal Univ, Coll Life Sci, Dept Biotechnol, Xinyang, Peoples R China
2.Hainan Acad Agr Sci, Inst Anim Sci & Vet Med, Haikou, Hainan, Peoples R China
3.Xinyang Normal Univ, Inst Conservat & Utilizat Agrobioresources Dabie, Xinyang, Peoples R China
关键词: circRNA; brown adipocyte; adipogenesis; obesity; high-throughput RNA sequencing
期刊名称:FRONTIERS IN GENETICS ( 影响因子:4.599; 五年影响因子:4.888 )
ISSN:
年卷期: 2021 年 12 卷
页码:
收录情况: SCI
摘要: Brown adipose tissue (BAT) is specialized for energy expenditure, thus a better understanding of the regulators influencing BAT development could provide novel strategies to defense obesity. Many protein-coding genes, miRNAs, and lncRNAs have been investigated in BAT development, however, the expression patterns and functions of circRNA in brown adipogenesis have not been reported yet. This study determined the circRNA expression profiles across brown adipogenesis (proliferation, early differentiated, and fully differentiated stages) by RNA-seq. We identified 3,869 circRNAs and 36.9% of them were novel. We found the biogenesis of circRNA was significantly related to linear mRNA transcription, meanwhile, almost 70% of circRNAs were generated by alternative back-splicing. Next, we examined the cell-specific and differentiation stage-specific expression of circRNAs. Compared to white adipocytes, nearly 30% of them were specifically expressed in brown adipocytes. Further, time-series expression analysis showed circRNAs were dynamically expressed, and 117 differential expression circRNAs (DECs) in brown adipogenesis were identified, with 77 upregulated and 40 downregulated. Experimental validation showed the identified circRNAs could be successfully amplified and the expression levels detected by RNA-seq were reliable. For the potential functions of the circRNAs, GO analysis suggested that the decreased circRNAs were enriched in cell proliferation terms, while the increased circRNAs were enriched in development and thermogenic terms. Bioinformatics predictions showed that DECs contained numerous binding sites of functional miRNAs. More interestingly, most of the circRNAs contained multiple binding sites for the same miRNA, indicating that they may facilitate functions by acting as microRNA sponges. Collectively, we characterized the circRNA expression profiles during brown adipogenesis and provide numerous novel circRNAs candidates for future brown adipogenesis regulating studies.
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