通过核因子I介导的染色质可访问性增加驱动了转换到雄激素受体结合变体的依赖性,而割抵抗性前列腺癌则是如此
bioRxiv : the preprint server for biology
|January 23, 2024
概括
雄激素受体变体7 (ARv7) 驱动前列腺癌在治疗耐药后的进展. 它的活性取决于增强的染色质可访问性,而不是全长的AR,突出显示了一个新的治疗脆弱性.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 包括ARv7在内的雄激素受体 (AR) 拼接变体与前列腺癌 (PC) 对雄激素信号传递抑制剂的耐药性有关.
- 通过AR变种驱动AR活动的精确机制及其依赖性尚未完全理解.
研究的目的:
- 调查ARv7在驱动恩扎拉胺耐药前列腺癌中AR活性中的作用.
- 确定ARv7.7的功能依赖性和染色体结合特性.
主要方法:
- 产生一种对酶胺胺耐药的VCaP细胞系 (VCaP16).
- 分析ARv7细胞体和转录体的分析.
- 染色体可访问性测定和图案丰富性分析.
- 对ARv7,NFIB和NFIX进行了淘汰研究.
主要成果:
- 耐药细胞中的AR活性是由ARv7驱动的,独立于全长AR (ARfl).
- ARv7染色体结合比ARfl更弱,但与高亲缘关系的ARfl位点相关.
- 延迟ARv7转录活性与增加的染色质可访问性有关,特别是在AR和核因子I (NFI) 动机上.
- ARv7和NFI因子 (NFIB,NFIX) 的转录效应高度相关.
结论:
- ARv7可以在耐药细胞中驱动前列腺癌AR程序.
- ARv7的活性取决于增强染色质可访问性的适应,克服其本质上较弱的染色质结合.
- 准ARv7和相关的染色质重塑因子可能为抗性前列腺癌提供治疗策略.
相关概念视频
Chromatin Structure Regulates pre-mRNA Processing
7.0K
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
7.0K
RNA Splicing
56.4K
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
56.4K
Alternative RNA Splicing
21.2K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.2K
Epigenetic Regulation
3.0K
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...
X-chromosome...
3.0K
Chromatin Position Affects Gene Expression
23.3K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
23.3K
Co-activators and Co-repressors
7.4K
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
7.4K


