相关实验视频
Updated: Jul 6, 2025
05:58
Proplatelet Formation Dynamics of Mouse Fresh Bone Marrow Explants
Published on: May 20, 2021
2.6K
新发现的PIEZO1机械传感器在控制正常巨核细胞发育和初级骨髓纤维化中的作用
Vittorio Abbonante1,2, Anastasia Iris Karkempetzaki3,4, Catherine Leon5
1Department of Molecular Medicine, University of Pavia, Pavia, Italy.
American journal of hematology
|January 2, 2024
概括
机械敏感的离子通道PIEZO1作为车作用于巨核细胞的成熟和血小板的形成. 在初级骨髓纤维化中PIEZO1的升级加剧了疾病的特征,但抑制挽救了血小板的产生.
科学领域:
- 血液学 血液学 血液学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 巨核细胞 (Mk) 的分化和血小板的形成是由骨髓微环境影响的复杂过程.
- 机械敏感离子通道,如PIEZO1,在细胞传感中发挥作用,但它们在巨核子形成中的特定功能基本上是未知的.
- 人类PIEZO1突变与血液疾病有关,这表明它可能在血液形成中发挥作用.
研究的目的:
- 研究机械敏感离子通道PIEZO1在巨核形成和血小板形成中的作用.
- 在生理和病理条件下,确定PIEZO1的表达或激活是否影响Mk的成熟,ploidy和血小板的产生.
- 探索PIEZO1抑制在像初级骨髓纤维化 (PMF) 这样的疾病中的治疗潜力.
主要方法:
- 在小鼠和人类巨核细胞中分析PIEZO1表达.
- 使用Piezo1/2淘汰赛小鼠和PIEZO1.1激活的体内研究.
- 在体外研究涉及人类Mk培养和PIEZO1抑制.
- 从健康个体的Mks中比较PIEZO1表达,基本血小板血,和JAK2V617FPMF患者.
主要成果:
- 在小鼠中PIEZO1激活增加了未成熟的Mks,但减少了成熟的Mks和ploidy.
- 皮埃佐1/2淘汰赛小鼠显示MK大小和血小板数量增加.
- 人类Mks中的PIEZO1激活减少了大小,性,成熟和血小板形成.
- 从JAK2V617FPMF小鼠和患者的Mks中观察到PIEZO1表达的升高,与血小板计数相反相关.
- 抑制PIEZO1挽救了PMF患者衍生的Mks.中的Mk ploidy,成熟和血小板形成.
结论:
- PIEZO1作为一个生理车,对巨核细胞的成熟和血小板的生产.
- 在PMF Mks中升级的PIEZO1有助于疾病病理生理学.
- 准PIEZO1为PMF和相关的骨髓增殖性瘤提供了潜在的治疗策略.
更多相关视频
相关概念视频
01:12Mechanically-gated Ion Channels
6.4K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
6.4K
01:22Microtubules in Signaling
1.7K
The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
1.7K
01:23Role of Matrix Metalloproteases in Degradation of ECM
2.4K
Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult...
2.4K
01:18Structure and Function of Platelets
1.2K
The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
1.2K