1. Aging Attenuates Cardiac Contractility and Affects Therapeutic Consequences for Myocardial Infarction
- Author
-
Jiaqing Xiang, Ming Dong, Jie Liu, Qianying Wu, Hongcheng Fang, Cong Xu, Yanqing Zhou, and Yang Ziyi
- Subjects
0301 basic medicine ,Cardiac function curve ,medicine.medical_specialty ,Ischemia ,Review Article ,Pathology and Forensic Medicine ,cardiac ischemia therapy ,Pathogenesis ,Contractility ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,medicine ,Myocardial infarction ,Cardiac ischemia ,business.industry ,Mechanism (biology) ,Therapeutic effect ,aging ,Cell Biology ,medicine.disease ,ischemia and reperfusion injury ,030104 developmental biology ,cardiac ischemia ,cardiac contractility ,Cardiology ,Neurology (clinical) ,sense organs ,Geriatrics and Gerontology ,business ,030217 neurology & neurosurgery - Abstract
Cardiac function of the human heart changes with age. The age-related change of systolic function is subtle under normal conditions, but abrupt under stress or in a pathogenesis state. Aging decreases the cardiac tolerance to stress and increases susceptibility to ischemia, which caused by aging-induced Ca2+ transient impairment and metabolic dysfunction. The changes of contractility proteins and the relative molecules are in a non-linear fashion. Specifically, the expression and activation of cMLCK increase first then fall during ischemia and reperfusion (I/R). This change is responsible for the nonmonotonic contractility alteration in I/R which the underlying mechanism is still unclear. Contractility recovery in I/R is also attenuated by age. The age-related change in cardiac contractility influences the therapeutic effect and intervention timepoint. For most cardiac ischemia therapies, the therapeutic result in the elderly is not identical to the young. Anti-aging treatment has the potential to prevent the development of ischemic injury and improves cardiac function. In this review we discuss the mechanism underlying the contractility changes in the aged heart and age-induced ischemic injury. The potential mechanism underlying the increased susceptibility to ischemic injury in advanced age is highlighted. Furthermore, we discuss the effect of age and the administration time for intervention in cardiac ischemia therapies.
- Published
- 2020