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Updated: Jun 4, 2026

Induction and Analysis of Oxidative Stress in Sleeping Beauty Transposon-Transfected Human Retinal Pigment Epithelial Cells

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Published on: December 11, 2020

Antioxidant network expression abrogates oxidative posttranslational modifications in mice.

R Mital¹, W Zhang, M Cai

¹Division of Cardiovascular Medicine, The Ohio State University, Columbus, Ohio, USA.

American Journal of Physiology. Heart and Circulatory Physiology

|February 22, 2011

Summary

This summary is machine-generated.

Overexpressing antioxidant enzymes SOD1, SOD3, and glutathione peroxidase-1 protects the heart from ischemia-reperfusion injury by reducing oxidative stress and protein damage.

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Area of Science:

Cardiovascular Biology
Oxidative Stress Research
Biochemistry

Background:

Antioxidant enzymes detoxify reactive oxygen species (ROS) during myocardial stress.
Previous studies on single antioxidant enzyme genetic alteration show inconsistent results in mitigating ischemia-reperfusion injury.
Myocardial ischemia-reperfusion injury involves extreme oxidative stress, lipid peroxidation, and protein modification.

Purpose of the Study:

To investigate if overexpressing an antioxidant network (AON) of SOD1, SOD3, and glutathione peroxidase-1 (GSHPx-1) protects against myocardial ischemia-reperfusion injury.
To determine if AON overexpression limits ROS formation, lipid peroxidation, and oxidative posttranslational modification (OPTM) of proteins.

Main Methods:

Utilized both ex vivo and in vivo myocardial ischemia models.
Evaluated the effect of AON expression on infarct size, ROS formation, lipid peroxidation, and OPTM.
Measured ROS using dihydroethidium staining and lipid peroxidation via malondialdehyde production.

Main Results:

AON overexpression significantly reduced infarct size in both ex vivo and in vivo models.
Markedly decreased ROS formation and ROS-mediated lipid peroxidation were observed in AON mice.
Significantly reduced OPTM of myocardial proteins, including fatty acid-binding protein and SERCA2a, in AON mice compared to wild-type.

Conclusions:

Concomitant expression of SOD1, SOD3, and GSHPx-1 provides significant protection against myocardial ischemia-reperfusion injury.
AON overexpression effectively reduces ROS, lipid peroxidation, and OPTM of critical cardiac proteins.
Targeting antioxidant networks offers a promising strategy for mitigating cardiac injury.