低慢性暴露对大鼠右心房和右心室的剂量依赖性影响:一个体外检查
Yuri L Protsenko1, Alexander Balakin1, Ilzira A Minigalieva2
1Institute of Immunology and Physiology of Ural Branch of the Russian Academy of Sciences, 620049, Yekaterinburg, Russian Federation.
Cardiovascular toxicology
|July 17, 2025
概括
暴露于会影响老鼠的心脏功能,改变肌重链比率和动力潜力在右心室和右心室的不同. 这些发现突出了心肌细胞对毒性的各种适应.
科学领域:
- 心血管生理学心血管生理学
- 毒理学 毒理学 毒理学
- 生物化学 生物化学
背景情况:
- 中毒是严重的健康问题,特别是它对心血管功能的不良影响.
- 了解对不同心室的具体影响对于评估整体毒性至关重要.
研究的目的:
- 研究酸暴露对雄性大鼠右心房和右心室的功能和分子影响.
- 为了确定剂量依赖的反应,并确定心房和心室肌动脉之间的差异性适应.
主要方法:
- 雄性大鼠通过腹腔内注射暴露于不同剂量的酸 (5.5,11,22.88毫克/公斤) 六周.
- 评估心血管参数,包括血压和心电图 (ECG) 特性.
- 分析了肌肉蛋白重链 (MHC) 异形转移,肌肉蛋白调节性轻链酸化和心肌张力在心房和心室组织中.
- 在两个腔室中测量了动作潜力的持续时间.
主要成果:
- 暴露降低了血压和QRS振幅,并以剂量依赖的方式降低了同电线.
- 在右心室观察到向β-MHC异型的转变,同时增加了肌肉酶调节光链酸化.
- 右心房显示活跃和被动张力降低,肌肉素调节轻链酸化降低.
- 动作潜力的持续时间在心房和心室肌动脉中因剂量而异地延长.
- 在右心房和右心室之间观察到不同的反应.
结论:
- 酸暴露会导致右心室和右心室的明显功能和分子变化.
- 心肌表现出不同的适应策略,以导致毒性,随剂量而异.
- 这些发现强调了中毒对心血管系统的复杂后果.
更多相关视频
08:34Left Atrial Stenosis Induced Pulmonary Venous Arterialization and Group 2 Pulmonary Hypertension in Rat
Published on: November 18, 2018
7.3K
09:40Induction of Right Ventricular Failure by Pulmonary Artery Constriction and Evaluation of Right Ventricular Function in Mice
Published on: May 13, 2019
10.7K
相关概念视频
01:20Mitral Regurgitation I: Introduction
58
Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
58
01:22Mitral Stenosis I: Introduction
41
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
41