在阻塞性睡眠呼吸暂停中因慢性间歇性缺氧引起的棕色脂肪组织功能障碍中微RNA的差异表达特征和生物信息学分析
Meilin Ji1,2, Yaopeng Guo3, Jinjie Zhang1,2
1The Second Clinical Medical College, Fujian Medical University, Quanzhou, China.
Frontiers in cell and developmental biology
|September 2, 2025
概括
阻塞性睡眠呼吸暂停 (OSA) 通过异常的微RNA (miRNA) 表达引起棕色脂肪组织损伤,这可能解释其与代谢综合征 (MS) 的联系. 这项研究确定了与OSA相关的BAT功能障碍相关的特定miRNA.
科学领域:
- 生物医学研究
- 分子生物学
- 睡眠医学
背景情况:
- 阻塞性睡眠呼吸暂停 (OSA) 是一种与代谢综合征 (MS) 相关的睡眠呼吸系统疾病.
- 连接OSA和MS的精确分子机制,特别是关于棕色脂肪组织 (BAT) 损伤,仍然在很大程度上是未知的.
- 微RNA (miRNA) 涉及各种生理和病理过程,包括代谢障碍.
研究的目的:
- 在慢性间歇性缺氧 (CIH) 后,在棕色脂肪组织中识别差异表达的miRNAs (DEmiRs),这是OSA的一个模型.
- 阐明OSA引起的BAT损害的潜在分子机制.
- 在CIH相关的BAT损害的背景下建立miRNA及其目标基因的监管网络.
主要方法:
- 使用APOE小鼠建立CIH诱导的BAT损伤的小鼠模型.
- 在受影响的BAT中分析miRNA表达特征的miRNA测序 (miRNA-seq).
- 生物信息分析包括基因本体学 (GO) 和基因和基因组的京都百科全书 (KEGG) 途径分析.
- 使用实时定量PCR (RT-qPCR) 验证关键的DEmiR.
- 构建一个miRNA-mRNA网络来预测miRNA-目标基因相互作用.
主要成果:
- 在小鼠BAT中,CIH暴露导致miRNA表达的显著变化.
- 总共有23个DEmiR被确定,7个是上调和16个是下调.
- RT-qPCR证实了六个关键miRNA的差异表达.
- GO和KEGG分析显示这些DEmiR参与了与代谢调节和炎症相关的途径.
- 构建了一个miRNA-mRNA调节网络,突出了已识别的DEmiR的潜在目标.
结论:
- 由OSA引起的BAT功能障碍与miRNA表达的广泛和特定变化有关.
- 鉴定到的DEmiR及其预测的点为将OSA与代谢综合征联系在一起的分子机制提供了新的见解.
- 这项研究为了解miRNAs在OSA病理生理学中的作用提供了基础,并提出了潜在的治疗点.
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
