抑制LOXL2可以改善肺动脉重塑在肺高血压
Jochen Steppan1, Huilei Wang2, Kavitha Nandakumar1
1Department of Anesthesiology and Critical Care Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, United States.
肺动脉硬化是肺动脉高血压 (PAH) 的关键因素,由类似2 (LOXL2) 的lysyl氧化酶驱动. 在PH模型中,用PAT-1251抑制LOXL2可以改善肺动脉功能和生存.
科学领域:
- 心血管生物学 心血管生物学
- 肺高血压的病理生理学
- 血管重塑机制 血管重塑机制
背景情况:
- 肺动脉硬化和血管阻抗增加是肺动脉高血压 (PAH) 的关键驱动因素.
- 矩阵沉积和血管重塑对于PAH的发展至关重要.
- 类似于2的lysyl氧化酶 (LOXL2),一个原交叉链接酶,涉及到血管重塑.
研究的目的:
- 调查基氧化酶2 (LOXL2) 在肺动脉硬化和肺高血压 (PH) 中的作用.
- 在PH模型中评估新型LOXL2抑制剂PAT-1251的治疗潜力.
主要方法:
- 在低氧状态下,对人类肺动脉光滑肌细胞 (PASMCs) 的LOXL2表达和活性进行了评估.
- 使用肺高血压的老鼠模型 (Sugen 5416 + 缺氧和单氨酸) 来测量肺动脉和肺中的LOXL2水平.
- 评估肺动脉功能 (收缩性,血管松,硬度) 和右心脏功能 in vivo 和 ex vivo.
- 服用LOXL2抑制剂PAT-1251并评估其对PH参数和生存时间的影响.
主要成果:
- 低氧增加了人类PASMC中的LOXL2分泌.
- 在PH大鼠模型中,LOXL2的表达和活性显著升高.
- 肺动脉的PH显示过度收缩性,血管松功能受损,硬度增加.
- PAT-1251治疗改善了肺动脉的机械特性,内皮功能和右心功能.
- PAT-1251改善了PH,降低了肺动脉压力,改善了右心室重塑,并提高了生存率.
结论:
- 缺氧诱导的LOXL2激活是肺动脉硬化和PH功能下降的因果因素.
- 抑制LOXL2是一种有前途的治疗策略,可以改善肺动脉压力,右心室功能和PAH的存活率.
- 准LOXL2提供了一种新的方法来阻止血管重塑并改善肺高血压的结果.
更多相关视频
07:41A Model of Reverse Vascular Remodeling in Pulmonary Hypertension Due to Left Heart Disease by Aortic Debanding in Rats
Published on: March 1, 2022
09:23Shunt Surgery, Right Heart Catheterization, and Vascular Morphometry in a Rat Model for Flow-induced Pulmonary Arterial Hypertension
Published on: February 11, 2017
相关概念视频
Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme...
Treatment for Pulmonary Arterial Hypertension: Receptor Tyrosine Kinase Inhibitors and Calcium Channel Blockers
TKIs, such as imatinib (Gleevec), are particularly effective in tackling the growth and mitogenic factors that become upregulated in PAH patients. These factors contribute to the...
Treatment for Pulmonary Arterial Hypertension: Prostacyclin Receptor Agonists
These agonists bind to the IPR receptor situated on the plasma membrane of the pulmonary artery smooth muscle cells. This binding triggers a cascade of reactions known as the GS-AC-cAMP-PKA pathway. This pathway results in the relaxation of smooth muscle...
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
