在i-motif结构的进步:稳定性,基因表达和治疗应用
Mengqing Wu1, Yang Liu1, Xiao Zhu1
1College of Basic Medicine, Zunyi Medical University, Zunyi 563000, Guizhou Province, China.
International journal of biological macromolecules
|April 28, 2025
概括
一个pH敏感的DNA结构i-motif调节基因表达,并提供治疗潜力. 纳米技术和精密医学的进步突出了它在治疗癌症等疾病中的作用.
科学领域:
- 生物化学和分子生物学
- 遗传学 是一个遗传学.
- 纳米技术纳米技术
背景情况:
- i-motif是一个独特的DNA二次结构,由在酸性条件下由丰富的细胞因子序列形成.
- 它与基因表达的调节有关,特别是在关键瘤基因 (例如,Bcl-2,C-MYC,KRAS) 的促进子区域.
- 它对pH值敏感的性质为向治疗和诊断工具提供了机会.
研究的目的:
- 审查i-motifs在生物过程中的多方面的作用.
- 探索i-motifs在各种疾病中的治疗潜力,包括瘤学,代谢障碍和神经退行性疾病.
- 突出基于i-motif的纳米技术和精密医学的最新进展和未来方向.
主要方法:
- 对i-motif结构,功能和应用研究的文献综述.
- 对i-motif与转录因子和连接体相互作用的分析.
- 检查基于i-motif的纳米技术,包括pH传感器和药物输送系统.
主要成果:
- 通过与转录因子的相互作用,i-动因动态调节瘤基因活性.
- 对pH敏感的i-motif结构使细胞pH传感器 ("i-switch") 和向药物递送系统 (DNA水凝) 的开发成为可能.
- 在开发特定的i-动机配体和检测方法方面存在挑战.
结论:
- i-motifs是关键的治疗点和多功能工具,在精准医学中具有显著的潜力.
- 需要进一步的研究来克服当前的挑战,并充分利用i-motif应用程序.
- 基于i-motif的策略显示,通过利用它们独特的pH依赖性质来治疗一系列疾病是有前途的.
相关概念视频
Regulation of Expression Occurs at Multiple Steps
22.0K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
22.0K
mRNA Stability and Gene Expression
5.5K
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
5.5K
RNA Stability
33.1K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
33.1K
Covalently Linked Protein Regulators
6.7K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
6.7K
Regulated mRNA Transport
6.2K
In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...
6.2K
Regulation of Expression at Multiple Steps
849
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...
849


