相关实验视频
Updated: Jan 10, 2026

08:53
A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
Published on: September 15, 2021
3.2K
在狼中性粒细胞中U12型分离的失调
Luz P Blanco1, Binod Regmi2, Carmelo Carmona-Rivera1
1Systemic Autoimmunity Branch, at the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health (NIH), Bethesda, Maryland, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
系统性红斑狼 (SLE) 中性粒细胞的功能受损,原因是轻微的 spliceosome 缺陷影响了依赖 U12 的拼接. 这导致NADPH氧化酶活性降低和免疫调节的改变,突出显示小结合体.
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 是一个遗传学.
背景情况:
- 中性粒细胞功能障碍是系统性红斑狼 (SLE) 的一个关键特征.
- 低密度颗粒细胞 (LDGs),一种促炎性中性粒细胞子集,在SLE中得到扩大.
- 在SLE中中性粒细胞功能障碍背后的分子机制尚未完全理解.
研究的目的:
- 调查SLE LDGs中的转录和转录后变化.
- 探索NADPH氧化酶 (Nox) 功能的作用和SLE中性粒细胞中微小的内子拼接.
- 识别导致SLE中中性粒细胞功能障碍的分子标.
主要方法:
- 从SLE患者和健康对照 (HC) 中分离LDG和正常密度中性粒细胞 (NDG).
- 在转录和蛋白质水平上对CYBA (P22phox) 表达的评估.
- 测量诺克斯活性,大量RNA测序和rMATS分析用于替代拼接,重点是U12型内核.
主要成果:
- 在SLE LDGs中观察到减少CYBA表达和受损的Nox活性.
- 转录组分析显示,SLE LDG中U12型内核含基因的广泛下调,表明小的结合体功能障碍.
- 在像GBP5,MAEA和STX10这样的基因中发现了增加的U12类型内质保留和广泛的拼接缺陷 (例如,外质跳转),与疾病活性相关.
结论:
- 损坏的U12依赖拼接有助于SLE中中性粒细胞功能障碍.
- 缺陷的拼接可能会影响SLE中性粒细胞的氧化突发和免疫调节.
- 小结合体被认为是狼发病的新型因子.
更多相关视频
相关概念视频
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
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
Alternative RNA Splicing
4.8K
4.8K
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
Nonsense-mediated mRNA Decay
11.7K
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
11.7K
Pre-mRNA Processing: RNA Splicing
6.5K
6.5K

