# Protective Effects of Oxyresveratrol in Isoproterenol-Induced Myocardial Infarction in Rats: A Stereological Study*

## TL;DR

This study shows that oxyresveratrol protects rat hearts from damage caused by isoproterenol, likely through its antioxidant and anti-inflammatory effects.

## Contribution

The novel finding is that oxyresveratrol, especially at 20 mg/kg, significantly reduces oxidative stress and myocardial damage in a rat model of heart infarction.

## Key findings

- Oxyresveratrol reduced oxidative stress markers like MDA and increased antioxidant levels like SOD and GSH.
- Histopathological and stereological evaluations confirmed oxyresveratrol's protective effects at the cellular level.
- Oxyresveratrol showed dose-dependent cardioprotective effects, with 20 mg/kg being most effective.

## Abstract

The aim of this study is to examine the protective effect of oxyresveratrol (OXY) against isoproterenol-induced myocardial infarction in rats, through routine biochemical parameters and oxidative stress parameters that show heart damage.

Oxyresveratrol was administered by oral gavage at doses of 10 and 20 mg/kg, respectively, once a day for 5 days. On the fourth and fifth days, 180 mg/kg isoproterenol was administered intraperitoneally to the OXY treatment group and control groups. Twenty-four hours after the last isoproterenol application, blood and heart tissue were taken under anesthesia and transferred to −80 degrees and formalin for biochemical and histopathological studies. CK-MB and TnI levels were measured in serum obtained from blood. In the heart tissue, antioxidant parameters, superoxide dismutase (SOD), glutathione (GSH) and malondialdehyde (MDA) levels, and histopathological and stereological evaluations were performed.

Oxyresveratrol has antioxidant and anti-inflammatory activity depending on the dose. Oxyresveratrol showed potent protective effect against isoproterenol-induced myocardial infarction. It has been proven that at all doses of oxyresveratrol, statistically, isoproterenol decreased the MDA level, which was one of the oxidative stress markers, compared to the control group, and increased SOD activity and GSH levels. Similar to the biochemically determined parameters, oxyresveratrol treatment was also found to have a protective effect at the cell level, histopathologically and stereologically.

All results show that oxyresveratrol has strong antioxidant and anti-inflammatory activity, especially at a dose of 20 mg/kg, it significantly reduces myocardial damage and this agent has a cardioprotective effect.