H/ACA snoRNAs和snoRNP 调节失调 链接 rRNA 修改到质母细胞瘤 进展
Research square
|January 9, 2026
概括
小核RNAs (snoRNAs) 在质母细胞瘤 (GBM) 中发生变化,影响核糖体功能,并可能作为治疗点. 针对特定的snoRNA与反感性寡核酸向抑制了GBM细胞生长,显示了癌症治疗的前景.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 在RNA生物学,RNA生物学.
背景情况:
- 小核RNAs (snoRNAs) 对于核糖体生物生成至关重要,指导rRNA修饰,如2'O甲基化和伪尿基化.
- 失调的snoRNA表达与包括癌症在内的各种病理有关,它可以影响核糖体组成和翻译.
- 了解质母细胞瘤 (GBM) 中的snoRNA概况对于深入了解核糖体生物发生以及识别新的生物标志物和治疗点至关重要.
研究的目的:
- 在质母细胞瘤 (GBM) 和质母细胞瘤干细胞 (GSCs) 中分析小核核RNA (snoRNA) 和Cajal体特异性RNA (scaRNA).
- 调查snoRNAs与GBM的茎性和分化之间的关联.
- 评估针对GBM中失调的snoRNA的治疗潜力.
主要方法:
- 开发一个Ampliseq平台来测量127个snoRNAs和scaRNAs.
- 对质瘤干细胞 (GSC),GBM和正常神经元线/组织中的snoRNA/scaRNA表达的分析.
- 通过对特定snoRNAs的反感性寡核酸敲击抑制GBM细胞生长的评估.
主要成果:
- 在GBM/GSC细胞和正常神经元细胞之间发现的snoRNAs/scaRNAs的差异表达,其中一些与干细胞有关.
- 在GBM中观察到上调的snoRNAs (snoRA38,snoRA51,snoRA71,snoRA75) 和H/ACA的snoRNP成分,包括Dyskerin (DKC1).
- 高DKC1表达与高度质瘤患者的低生存率相关.
- 淘汰snoRA46和snoRA75显著损害了GBM细胞生长.
结论:
- 与正常神经元细胞相比,质母细胞瘤发生了snoRNA/scaRNA表达的明显改变,可能会重新编程rRNA修饰和核糖体组成.
- 在GBM中过度表达dyskerin (DKC1) 与患者的生存率差有关.
- 使用反感性寡核酸向GBM中的过度表达的snoRNAs是一个有前途的治疗策略.
相关概念视频
lncRNA - Long Non-coding RNAs
9.8K
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...
9.8K
Alternative RNA Splicing
24.6K
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...
24.6K
Chromatin Structure Regulates pre-mRNA Processing
8.1K
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...
8.1K
The Nucleolus
10.2K
The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
10.2K
Abnormal Proliferation
5.1K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.1K
RNA Splicing
60.3K
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...
60.3K

