在miRNA生物发生和衰变方面的近期进展.
Xavier Bofill-De Ros1,2, Ulf Andersson Vang Ørom1
1RNA Biology and Innovation, Institute of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark.
RNA biology
|November 30, 2023
概括
本综述详细介绍了微RNA生物发生和调节,从核转录到细胞质衰变. 了解微RNA稳态是开发新治疗点的关键.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 生物化学 生物化学
背景情况:
- 微RNA (miRNA) 是小型调节性RNA,通过结合mRNA来控制蛋白质合成.
- miRNA生物发生涉及核转录,处理和细胞质成熟.
- 细胞质衰变机制调节成熟的miRNA水平,影响细胞平衡.
研究的目的:
- 审查了解完整miRNA生命周期的最新进展.
- 要突出监管步骤涉及到维护miRNA平衡.
- 为了强调miRNA调节的治疗潜力.
主要方法:
- 关于miRNA生物发生和调节的最新研究的文献综述.
- 对调节miRNA稳定性和降解的分子机制的分析.
- 综合关于miRNA平衡的当前知识.
主要成果:
- 从转录到细胞质功能的miRNA处理的详细概述.
- 监管检查点控制miRNA水平的解释.
- 确定影响miRNA寿命和稳定性的关键因素.
结论:
- 对miRNA调节的全面理解对于维持细胞平衡至关重要.
- 在多个生物阶段,miRNA稳态受到严格控制.
- 准miRNA通路为各种疾病提供了有前途的治疗策略.
相关概念视频
MicroRNAs
3.0K
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...
3.0K
Nuclear Export of mRNA
7.7K
Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
7.7K
mRNA Stability and Gene Expression
5.6K
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
5.6K
Nonsense-mediated mRNA Decay
2.8K
2.8K
Regulation of Expression at Multiple Steps
917
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
917
piRNA - Piwi-interacting RNAs
6.9K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
6.9K


