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相关概念视频

Epigenetic Regulation01:37

Epigenetic Regulation

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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Epigenetic Regulation01:46

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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Cell Specific Gene Expression01:58

Cell Specific Gene Expression

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Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
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Hormones Regulating Blood Glucose01:16

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Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
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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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相关实验视频

Updated: Jan 7, 2026

Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
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葡萄糖皮质类药物调节人类非编码基因组.

Thai Tran1, Robert Kwiat1, Qilin Cao1

  • 1Functional Immunogenomics Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health. Bethesda, MD 20892. U.S.A.

bioRxiv : the preprint server for biology
|December 25, 2025
PubMed
概括
此摘要是机器生成的。

葡萄糖皮质体 (GCs) 显著改变非编码RNA的表达,大多数长非编码RNA (lncRNA) 和微RNA (miRNA) 显示细胞类型特定的反应. 这项研究揭示了新的GC调节的非编码转录,具有潜在的临床相关性.

关键词:
皮质类固醇是一种皮质类固醇.葡萄糖皮质类药物是什么人类 人类 人类 人类 人类长长的非编码RNA.这是一个微型RNA.在RNA测序过程中,RNA测序小的RNA小的RNA小的RNA类固醇是一种类固醇.这是一个小RNARNA.

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相关实验视频

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科学领域:

  • 基因组学就是基因组学.
  • 分子生物学分子生物学
  • 药理学 药理学是指药理学的学科.

背景情况:

  • 葡萄糖皮质醇 (GCs) 是一种强大的抗炎和免疫抑制药物.
  • GCs对基因表达有深远的影响,但它们对非编码RNA的影响在很大程度上是未知的.
  • 了解GCs对非编码RNA的调节对于解释治疗变异性至关重要.

研究的目的:

  • 综合分析非编码基因组的葡萄糖皮质体调节.
  • 为了研究长非编码RNA (lncRNA) 和微RNA (miRNA) 对GCs的细胞类型特定反应.
  • 识别由GCs调节的新型非编码转录.

主要方法:

  • 对9种人类初级细胞类型进行系统的转录基因分析 (总RNA-seq和小RNA-seq).
  • 用GC进行体外治疗,然后在2小时和6小时进行RNA测序.
  • 生物信息分析以识别GC响应的非编码转录.

主要成果:

  • 确定了2000多个GC响应的非编码转录,包括654个注释的lncRNA和1376个新的lncRNA.
  • 对GCs的非编码RNA反应高度依赖细胞类型,其中80%的lncRNA和97%的miRNA都属于单细胞类型.
  • 数十个可选的lncRNA被GCs de novo诱导;miRNA调节似乎独立于它们的宿主lncRNAs.

结论:

  • GCs在非编码RNA表达中诱导广泛的,细胞类型特定的变化.
  • 已识别的非编码RNA可以作为GC暴露,敏感性或耐药性的生物标志物.
  • 这项工作为理解GC响应异质性中的非编码RNA作用提供了一个框架.