Task: Answer Verification
Input (English): Question: Does preconditioning prevent postischemic dysfunction in aging heart?
Answer: Preconditioning transient ischemic stimulus significantly reduces postischemic dysfunction in adult but not in senescent hearts, whereas exogenous norepinephrine is able to mimic preconditioning in both adult and senescent hearts. Ischemic preconditioning induces an increase in norepinephrine release in adult but not in senescent hearts. Preconditioning induced by transient ischemic stimulus and norepinephrine was abolished by alpha-adrenergic receptor blockade in both adult and senescent hearts. Thus, our data demonstrate that preconditioning is absent in aging heart and is probably related to the reduction of norepinephrine release and alpha-adrenergic receptor stimulation in response to ischemic preconditioning.
Output (English): no