相关实验视频
Updated: Jun 21, 2025

08:25
Flow Cytometric Characterization of Murine B Cell Development
Published on: January 22, 2021
15.6K
UPF1在早期B细胞发育中起着至关重要的作用
Noriki Iwai1, Kotaro Akaki1, Fabian Hia1
1Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Nature communications
|July 9, 2024
概括
RNA螺旋酶UPF1对于早期B细胞发育至关重要,因为它使必要的基因重组成为可能. 它的缺失阻断了B细胞的成熟,突出了UPF1在免疫细胞编排中的关键作用.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 依赖ATP的RNA螺旋酶UPF1是mRNA降解的关键因素,特别是无意义介导的mRNA衰变 (NMD).
- 早期的B细胞发育涉及复杂的基因重组,这对于产生功能性B细胞至关重要.
研究的目的:
- 研究UPF1在早期B细胞发育中的作用及其对免疫球蛋白重 (Igh) 基因重组的影响.
- 阐明UPF1影响B细胞分化的分子机制.
主要方法:
- 在小鼠中利用B细胞特异的Upf1删除来研究发育缺陷.
- 分析了VH-DHJH和DH-JH在发育中的B细胞中的重组效率.
- 研究了UPF1相互作用和目标基因的调节.
主要成果:
- 在早期B细胞发育过程中,UPF1被上调,对于从早期LPre-B细胞过渡到晚期LPre-B细胞至关重要.
- 针对B细胞的Upf1删除严重损害了VH-DHJH的重组,阻断了B细胞的发展.
- Igh基因的遗传预安排部分挽救了分化,但在轻链重组后,发展停止了.
- UPF1调节了参与免疫反应,细胞循环,NMD和展开蛋白质反应的基因.
结论:
- UPF1在早期B细胞发育中发挥着关键的,非冗余的作用,特别是在VH-DHJH重组过程中.
- UPF1通过调节关键细胞过程和基因表达来协调B细胞的发育.
- 了解UPF1的功能,可以了解免疫细胞的发育和潜在的治疗点.
相关概念视频
B Cell Activation and Differentiation
1.7K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
1.7K
Cells of the Adaptive Immune Response
977
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
977
NF-κB-dependent Signaling Pathway
7.4K
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The...
NF-κB-dependent Signaling Mechanism
The...
7.4K
Development of Immunocompetence
300
The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
300
Differentiation of Common Myeloid Progenitor Cells
3.2K
Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
3.2K
Negative Regulator Molecules
35.3K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
35.3K

