Cardio-protective determinants are conserved in aged human myocardium after ischemic preconditioning.

Abstract:

:Ischemic preconditioning (IPrec) improves post-ischemic dysfunctions of the myocardium along with activation of protein kinase C isozymes including PKCdelta. Moreover, expression of cardio-protective determinants can reduce ischemic damages. Because IPrec is limited in aged hearts, we assessed in an experimental model the impact of aging on PKCdelta and selected protective proteins in the preconditioned myocardium from adult (< or =55) and older (> or =70 years) humans. Adult myocardium showed PKCdelta up-regulation after IPrec along with improved post-ischemic contractility. Although there was no functional benefit, PKCdelta increased in older myocardium as well. Subsequent mRNA analyses demonstrated that IPrec stabilizes the mRNA expression of protective proteins (Hsp70, Bcl-2/-xL, IAPs) in both aging groups. Moreover, older hearts revealed increase in post-ischemic Hsp90beta. Our study indicates, that IPrec conserves the expression of cardio-protective determinants in aged hearts despite limited functional recovery.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Bartling B,Hilgefort C,Friedrich I,Silber RE,Simm A

doi

10.1016/s0014-5793(03)01342-5

keywords:

subject

Has Abstract

pub_date

2003-12-18 00:00:00

pages

539-44

issue

3

eissn

0014-5793

issn

1873-3468

pii

S0014579303013425

journal_volume

555

pub_type

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