Editorials |
From the Myocardial Biology Unit and Cardiovascular Division, Boston University Medical Center, and Boston University School of Medicine, Boston, Mass.
Correspondence to Wilson S. Colucci, MD, Boston University Medical Center, 88 E Newton St, Boston, MA 02118. E-mail wilson.colucci@bmc.org
Key Words: myocardium free radicals antioxidant
| Introduction |
|---|
50% lower in
the failing myocardium, suggesting a functional blockade of
the electron transport system. Because the isolation of
submitochondrial particles removes competing antioxidant enzymes, the
observed increase in DMPO spin signal was indicative of an increase in
gross (but not net) O2-
production and therefore was not necessarily indicative of
oxidative stress per se. Oxidative stress was suggested, however, by
the finding of increased lipid peroxidation products in the
myocardium of the animals with heart failure.
In the present study, Ide et al1 extend their earlier
observations by showing that the production of reactive oxygen
species (ROS) is increased in the failing
myocardium.2 By measuring the
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