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相关概念视频

Adrenergic Receptors: ɑ Subtype01:31

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Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
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α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
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Antihypertensive Drugs: Angiotensin II Receptor Blockers

In the renin-angiotensin-aldosterone system, a hormone called angiotensin II plays a crucial role. It binds to the AT1 receptors in vascular smooth muscles coupled with Gq proteins. The activation of these receptors activates an enzyme called phospholipase C, which releases two molecules: inositol trisphosphate and diacylglycerol. These molecules cause a chain reaction that leads to the phosphorylation of myosin light chains and promotes interaction between actin and myosin, leading to smooth...
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相关实验视频

Updated: Jul 8, 2026

Quantitative Analysis and Characterization of Atherosclerotic Lesions in the Murine Aortic Sinus
06:43

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Published on: December 7, 2013

ангиотензин 2 型受体在小鼠动脉样硬化病变中表达,并调节病变演变.

Virna L Sales1, Galina K Sukhova, Marco A Lopez-Ilasaca

  • 1Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA. virna.sales@childrens.harvard.edu

Circulation
|November 16, 2005
PubMed
概括
此摘要是机器生成的。

血管激素II型2受体 (AT2R) 在调节动脉样硬化中起着至关重要的作用. 在病变发展过程中AT2R信号的丧失显著增加了动脉样硬化病变中的细胞性程度.

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科学领域:

  • 心血管生物学 心血管生物学
  • 血管医学 血管医学
  • 动脉样硬化研究 动脉样硬化研究

背景情况:

  • 血管激素II型2受体 (AT2R) 在血管系中已知具有抗增殖,抗纤维和益的作用.
  • 在正常的成年动物中,AT2R的表达通常很低,但随着血管损伤和炎症而增加.
  • 人们假设AT2R表达在动脉样硬化开始和进展期间会增加.

研究的目的:

  • 研究AT2R表达在动脉样硬化发展中的作用.
  • 确定AT2R缺乏对动脉样硬化病变进展的影响.

主要方法:

  • 在apolipoprotein E-deficient (ApoE(-/-)) 小鼠中的动脉样硬化病变使用实时PCR和免疫组织化学分析了AT2R的存在.
  • 包括ApoE(-/-) /Agtr2-和ApoE(-/-) /Agtr2+基因型的小鼠被食高胆固醇饮食.
  • 在不同的时间点评估了损伤组成,细胞性,扩散 (BrdU结合) 和亡 (TUNEL染色).

主要成果:

  • 在ApoE(-/-) 小鼠的动脉样硬化病变中检测到AT2Rs.
  • 10周后,在基因型之间没有观察到病变区域或组成的显著差异.
  • 在16周后,ApoE(-/-) /Agtr2+小鼠与ApoE(-/-) /Agtr2-小鼠相比,显示了较低的巨细胞,光滑肌肉,脂质和原含量,伴随着增殖的减少和亡的增加.

结论:

  • 在动脉样硬化病变演变过程中AT2R信号的丧失增加了病变的细胞性.
  • 这些发现确立了AT2R作为动脉动脉生成的显著调节器.