相关实验视频

Updated: May 9, 2025

Development of a Murine Model for Femoral Artery Anastomotic Stenosis

Development of a Murine Model for Femoral Artery Anastomotic Stenosis

Published on: April 18, 2025

血管光滑肌肉细胞迁移和P70S6K:在内极性增生症发展中的关键因素

Sara Moreno-Estar^1,2, Pilar Cidad^1,2, Marycarmen Arevalo-Martinez^1,2

¹Departamento de Bioquímica y Biología Molecular y Fisiología Universidad de Valladolid Valladolid Spain.

Journal of the American Heart Association

|May 2, 2025

概括

结合PAP-1和everolimus (EV) 意外地恶化了内脏增生症,因为它影响了血管光滑肌肉细胞迁移,而不是增殖. 化P70S6K作为一个关键的标志物,用于亲密的增多的进展.

科学领域:

心血管生物学心血管生物学
翻译医学是一种翻译医学.
药理学药理学是指药理学的学科.

背景情况:

血管光滑肌细胞 (VSMC) 的激活驱动内脏增生 (IH) 和受伤后的复缩.
使用mTOR阻断剂 (例如,everolimus [EV]) 的药物排泄支架在有效性和特异性方面存在局限性.
Kv1.3通道阻塞剂 (例如,PAP-1) 之前已经显示出在预防IH方面的潜力.

研究的目的:

调查PAP-1和EV对IH发展的联合影响.
探索潜在的分子机制,包括VSMC中的通路交叉.
为了确定IH进展的潜在代孕标志物.

主要方法:

在活体研究中,使用小鼠动脉结模型.
人体血管的ex vivo器官培养.
在人体初级VSMC体外研究,评估细胞迁移,增殖和信号通路 (mTOR,MEK/ERK,P70S6K).

主要成果:

单独地,PAP-1和EV抑制了IH,但它们的组合意外地加剧了IH.
这种组合取消了抑制VSMC迁移和增强扩散的抑制.
通过P70S6K激活介导的mTOR和MEK/ERK通路之间的交叉声被确定,与IH发展相关.

结论:

VSMC迁移,而不是扩散,是PAP-1和EV对IH观察到影响的主要驱动因素.
VSMC P70S6K酸化是IH进展的可靠替代标记物.
复杂的,非单调的反应表明一种类似于NOR门的机制,为IH预防策略提供了新的见解.

关键词:

Kv1.3 通道阻塞器在P70S6K中使用.这是Everolimus.亲密性增生症是什么?血管光滑肌肉细胞迁移

更多相关视频

Murine Aortic Crush Injury: An Efficient In Vivo Model of Smooth Muscle Cell Proliferation and Endothelial Function

Murine Aortic Crush Injury: An Efficient In Vivo Model of Smooth Muscle Cell Proliferation and Endothelial Function

Published on: June 11, 2017

Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro

Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro

Published on: February 15, 2022

相关概念视频

Regulation of Angiogenesis and Blood Supply

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...

Mechanism of Angiogenesis

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...

Cell Migration

Cell Migration

Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.

Cytoskeletal Coordination in Cell Migration

Cytoskeletal Coordination in Cell Migration

A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...

Role of Myosin in Cell Migration

Role of Myosin in Cell Migration

Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
Myosin II is a hexamer comprising two heavy chains with globular heads and coiled-coil tails, two regulatory light chains, and two essential light chains. The ATPase sites on the myosin heads hydrolyze ATP, and the released phosphate generates the force for contraction....

Vascular Spasm

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...