与年龄相关的肺静脉封闭性疾病恶化背后的机制
Amit Prabhakar1, Meetu Wadhwa2,3, Rahul Kumar4
1Cardiovascular Research Institute.
JCI insight
|September 13, 2024
概括
向蛋白激酶R (PKR) 和综合应激反应 (ISR) 途径可以治疗肺静脉封闭性疾病 (PVOD). 这一途径由菌素C (MMC) 激活,并且随着年龄的增长而恶化,导致严重的血管改造和心力衰竭.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 病理学 病理学 病理学
背景情况:
- 肺静脉封闭性疾病 (PVOD) 是一种罕见的,严重的肺高血压形式.
- PVOD阻塞肺血管,导致右心室衰竭和不良预后.
- 肺动脉高血压 (PAH) 的传统治疗方法对于PVOD通常是无效的.
研究的目的:
- 研究PVOD病变发生过程中PKR/ISR通路的作用.
- 确定年龄是否影响PVOD的严重程度和对PKR/ISR向的反应.
- 评估阻断PVOD中的PKR/ISR轴的治疗潜力.
主要方法:
- 使用了一种由线粒素C (MMC) 诱导的PVOD大鼠模型.
- 在年轻成年和老老鼠 (>1年) 中比较PVOD表型.
- 评估了血管改造,右心室缩以及ISR激活的分子标志物.
- 使用PKR和ISR的药理学抑制剂.
主要成果:
- 与年轻大鼠相比,MMC诱导的PVOD在老老鼠中引起了严重的血管改造和RV缩.
- 老老鼠表现出较高的基础ISR活性和降低的蛋白质酸酶1.
- 在两年龄组中,PKR和ISR阻断改善了PVOD表型.
- 在老老鼠中观察到持续的eIF2酸化和ISR激活.
结论:
- 年龄通过增强的ISR激活和受损的蛋白质酸酶1加剧PVOD严重程度.
- 该PKR/ISR通路是PVOD的一个关键调解器.
- 针对PKR/ISR轴是一个有前途的PVOD治疗策略,无论年龄如何.
相关概念视频
COPD: Pathogenesis and Clinical Features
244
Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
244
Chronic Obstructive Pulmonary Disease-II: Pathophysiology
2.7K
Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Inflammation
2.7K
Pulmonary Hypertension: Classification and Pathogenesis
158
Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
There are various classifications for PH, each relating to different underlying causes and also...
There are various classifications for PH, each relating to different underlying causes and also...
158
Chronic Obstructive Pulmonary Disease
1.2K
COPD is defined as a heterogeneous lung condition marked by persistent respiratory symptoms such as dyspnea, cough, and sputum production, caused by abnormalities in the airways that cause airflow obstruction.
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
1.2K
Chronic Obstructive Pulmonary Disease-III: Symptoms and Complications.
2.7K
Understanding the variety of primary symptoms and systemic complications that characterize chronic obstructive pulmonary disease (COPD) is crucial for healthcare professionals.
Symptoms of COPD can be classified as primary or systemic. Primary symptoms relate to reduced airflow, while systemic or extrapulmonary symptoms relate to COPD's broader impact on the body.
Primary Symptoms of COPD:
Symptoms of COPD can be classified as primary or systemic. Primary symptoms relate to reduced airflow, while systemic or extrapulmonary symptoms relate to COPD's broader impact on the body.
Primary Symptoms of COPD:
2.7K
Pneumonia II: Pathophysiology
233
The pathophysiology of pneumonia involves the following steps:
233


