衰老通过增强TLR2活性加剧心脏功能障碍和败血症死亡率
Yufeng Zhai1, Qingzhou Yao1, Erlinda The1
1Department of Surgery, University of Colorado Denver, Aurora, CO, United States.
Frontiers in cardiovascular medicine
|December 14, 2023
概括
衰老会通过通过Toll-like受体2 (TLR2) 增加心脏功能障碍使败血症的结果变得更糟. 在老年小鼠中阻断TLR2改善了心脏功能和存活率,突出TLR2.
科学领域:
- 免疫学 免疫学 免疫学
- 心血管生物学 心血管生物学
- 老年学是一门学科.
背景情况:
- 败血症不成比例地影响老年人,导致死亡率更高.
- 与年龄相关的易感性和败血症不良结果背后的机制尚不清楚.
- 收费类受体2 (TLR2) 与炎症反应有关.
研究的目的:
- 通过TLR2-依赖途径调查衰老是否会通过TLR2-依赖途径加剧败血症引起的心脏功能障碍.
- 确定TLR2在败血症期间与年龄相关的炎症反应中的作用.
主要方法:
- 在年轻和老的野生类型 (WT) 和TLR2淘汰赛 (KO) 老鼠中,血症的结和刺穿 (CLP) 模型.
- 左心室 (LV) 功能使用压力-体积微导管评估.
- 通过ELISA测量心肌和血炎性细胞因子 (TNF-α,IL-1β,IL-6,MCP-1) 的水平.
主要成果:
- 与年轻的WT小鼠相比,老WT小鼠表现出更严重的心脏功能障碍和更高的败血症后死亡率.
- 败血症老WT小鼠显示心肌和血炎症标志物升高.
- 在老的败血症小鼠中,TLR2淘汰减轻了与衰老相关的炎症差异,改善了心脏功能和生存率.
- 在老WT小鼠中,服用TLR2激动剂恶化了心脏功能障碍.
结论:
- 衰老加剧了败血症引起的心脏功能障碍和死亡率.
- 在衰老中TLR2活性升高有助于在败血症期间增加炎症反应,恶化心脏结果.
- 准TLR2可能为老年人败血症提供治疗效益.
相关概念视频
Pathophysiology of Heart Failure
1.6K
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
1.6K
Imbalances in Cardiac Output
1.4K
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
1.4K
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
436
The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
436
Acute Respiratory Failure-V
142
The treatment for acute respiratory failure varies based on factors like the underlying cause, overall health, and severity. A collaborative healthcare team is essential for early detection, often through arterial blood gas analysis. Identifying the cause is the primary goal, with treatment strategies adjusted for ventilation/perfusion (V/Q) mismatch, shunting, or diffusion impairment.
Ensure that patients are monitored continuously for their response to therapy, including changes in...
Ensure that patients are monitored continuously for their response to therapy, including changes in...
142
Pneumonia II: Pathophysiology
283
The pathophysiology of pneumonia involves the following steps:
283
Inflammation
53.5K
Overview
53.5K


