相关实验视频
Updated: Jun 13, 2025

07:37
An Adoptive Transfer Model of Rheumatoid Arthritis in Mice
Published on: June 6, 2025
57
需要RBM25来通过ACLYRNA拼接依赖的代谢重新连接来抑制炎症
Yunkai Zhang1,2,3, Ying Gao4, Yujia Wang5
1Naval Medical Center, Naval Medical University, Shanghai, 200433, China.
Cellular & molecular immunology
|September 9, 2024
概括
功能障碍的RNA拼接,特别是减少的RNA结合基因蛋白25 (RBM25),通过改变ATP酸酶 (Acly) 拼接和巨细胞代谢来驱动类风湿性关节炎 (RA) 炎症. 针对这个RBM25-Acly轴可以治疗自身免疫性关节炎.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 拼接酶功能障碍和异常RNA拼接与未解决的炎症和免疫病原发生有关.
- 类风湿性关节炎 (RA) 的发病过程涉及复杂的分子机制,包括改变基因表达和免疫细胞失调.
研究的目的:
- 调查mRNA拼接和拼接酶在类风湿性关节炎 (RA) 中的作用.
- 确定关键因素涉及RA病原和探索潜在的治疗点.
主要方法:
- 来自RBM25缺乏小鼠的巨细胞的多组学分析.
- 研究了RBM25与ATP酸酶 (Acly) 前mRNA的相互作用.
- 评估了Acly异构体对巨细胞代谢和炎症的影响.
- 使用关节炎和炎症的小鼠模型.
主要成果:
- 减少RNA结合动机蛋白25 (RBM25) 的表达会通过增加巨细胞中的促炎媒介和超炎症来加剧RA.
- 缺少RBM25会改变基因组修饰和低氧诱导因子-1α (HIF-1α) 的活性,增强促炎性基因转录.
- RBM25调解了Acly的替代拼接,产生了Acly长 (Acly L) 和Acly短 (Acly S) 异型.
- 由RBM25缺陷驱动的Acly S异型积累增强了糖解和乙-CoA的产生,促进了巨细胞过度活化和炎症损伤.
- 宏细胞特异性的RBM25缺失诱导了炎症和关节炎,这些都通过Acly抑制得到改善.
结论:
- RBM25-Acly拼接轴是RA和衰老相关炎症中巨细胞功能的关键调节器.
- 准RBM25-Acly通路为自身免疫性关节炎和相关炎症条件提供了潜在的治疗策略.
相关概念视频
Regulation of the Unfolded Protein Response
2.4K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.4K
Riboswitches
8.1K
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
8.1K
Alternative RNA Splicing
21.0K
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...
21.0K
RNA Splicing
56.2K
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...
56.2K
Experimental RNAi
6.1K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
6.1K
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

