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相关概念视频

lncRNA - Long Non-coding RNAs02:39

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In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
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Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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Updated: May 1, 2026

Study of Dendritic Cell Development by Short Hairpin RNA-Mediated Gene Knockdown in a Hematopoietic Stem and Progenitor Cell Line In vitro
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结合STAT3的长非编码RNA lnc-DC控制人类树突细胞分化.

Pin Wang1, Yiquan Xue, Yanmei Han

  • 1National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai 200433, China.

Science (New York, N.Y.)
|April 19, 2014
PubMed
概括

研究人员发现了一种名为lnc-DC的新型长非编码RNA (lncRNA),对树突细胞 (DC) 的分化和功能至关重要. 这种lncRNA激活STAT3,增强T细胞激活和免疫反应.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 长非编码RNAs (lncRNAs) 越来越多地被认为是它们在生物过程中的角色.
  • 然而,它们在免疫细胞分化和活性中的特定功能在很大程度上仍未被探索.
  • 了解lncRNA参与是解读复杂免疫调节的关键.

研究的目的:

  • 识别和描述涉及常规树突细胞 (DC) 差异化和功能的新型 lncRNA.
  • 阐明已识别的lncRNAs调节DC活动的分子机制.
  • 探索 lncRNAs 作为免疫细胞反应调节者的潜力.

主要方法:

  • 仅在人类常规DC中识别Inc-DC.
  • 在人体单细胞中的体外淘汰实验和使用小鼠骨髓细胞的体内研究.
  • 对T细胞激活试验的分析.
  • 调查STAT3 (信号传感器和转录3激活器) 激活通路,包括蛋白质结合和酸化试验.

主要成果:

  • 鉴定出 lnc-DC 是一种新型的 lncRNA,其特异性表达在人类常规的 DC 中.
  • 抑制lnc-DC显著损害了DC分化,并降低了它们刺激T细胞激活的能力.
  • lnc-DC在细胞质中直接与STAT3结合,促进其酸化,防止SHP1的脱酸化,从而激活STAT3信号.

结论:

  • lnc-DC是树突细胞分化和功能的关键调节者.
  • 这项研究揭示了一种新的lncRNA作用机制,涉及到STAT3信号的调节.
  • 这一发现扩大了 lncRNAs 在免疫中的已知作用,并为免疫细胞调节提供了新的见解.