肥胖症中的心肌活力:通过肌酸激酶增强ATP递送与减弱应激反应
在PubMed上查看摘要
概括
此摘要是机器生成的。在肥胖症中,心脏
科学领域
- 心脏病学
- 代谢疾病
- 生物物理
背景情况
- 肥胖与运动不耐受和心力衰竭有关.
- 肥胖患者的心肌活力和腹功能受损,但腹功能通常保持.
- 肥胖心脏中的ATP输送机制仍未得到充分研究.
研究的目的
- 在人类肥胖症中通过肌肉激酶 (CK) 调查心肌ATP转移率.
- 为了确定增加的CK活性是否会补偿低脂蛋白 (PCr) /ATP水平.
- 检查这些能量变化是否随着体重减轻而正常化.
主要方法
- 80名志愿者 (35名对照者,45名肥胖者) 接受了体质分析,MRI和31P磁共振光谱.
- 在休息和多布他胺压力期间评估酸蛋白/ATP和CK动力学.
- 肥胖的参与者接受了减肥干预和重新评估.
主要成果
- 肥胖心脏的静止肌肉蛋白/ATP较低,但CK反应率较高,保持静止ATP的输送.
- 对照组在压力期间增加了CK活性和ATP输出;肥胖的心脏没有.
- 在肥胖个体中,缩小缩率与压力期间的能量输送受损相关.
- 减肥使这些心肌能量异常正常化.
结论
- 肥胖患者心肌中CK活性增加维持了休息时的ATP递送,但限制了压力时的增加.
- 心肌能量输送受损导致肥胖患者的运动耐受性降低.
- 减肥可以扭转这些有害的心脏能量适应.
- 针对心肌能量通路,如CK,可能为与肥胖相关的心脏病提供治疗效益.
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