Abstract
The possible action of polyphenolic compounds in the reduction of reactive oxygen
species (ROS) and mitochondrial toxicity may suggest them as putative agents for the
treatment of drug-induced mitochondrial dysfunction and cardiotoxicity. This study
was designed to explore protective effect of ellagic acid (EA) against celecoxib-induced
cellular and mitochondrial toxicity in cardiomyocytes and their isolated mitochondria.
In order to do this, isolated cardiomyocytes and mitochondria were pretreated with
3 different concentrations of EA (10, 50 and 100 µM), after which celecoxib (16 µg/ml)
was added to promote deleterious effects on cells and mitochondria. Using flow cytometry
and biochemical methods, the parameters of cellular and mitochondrial toxicity were
investigated. Our results showed that celecoxib (16 µg/ml) caused a significant decrease
in cell viability, mitochondrial membrane potential (MMP), glutathione (GSH) in intact
cardiomyocytes and succinate dehydrogenase (SDH) activity, MMP collapse, and mitochondrial
swelling, and a significant increase in reactive oxygen species (ROS) formation, lipid
peroxidation (LP) and oxidative stress in isolated mitochondria. Also, our results
revealed that co-administration of EA (50 and 100 µM) with celecoxib significantly
attenuated the cellular and mitochondrial toxicity effects. In this study, we showed
that simultaneous treatment with of EA ameliorated the cellular and mitochondrial
toxicity induced by celecoxib, with cardiomyocytes presenting normal activity compared
to the control group, and mitochondria retaining their normal activity.
Key words
celecoxib - ellagic acid - polyphenols - cardiotoxicity - mitochondria