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Updated: Jan 21, 2026
Induction of Myocardial Infarction and Myocardial Ischemia-Reperfusion Injury in Mice
Published on: January 19, 2022
Significant reduction of ischemia-reperfusion cell death in mouse myocardial infarcts using the immediate-acting
Timothy A Hacker1, Gaoussou Diarra1, Bryan L Fahl2
1Cardiovascular Physiology Core Facility, Department of Medicine University of Wisconsin-Madison Madison Wisconsin.
Abstract:
Managing myocardial infarction (MI) to reduce cardiac cell death relies primarily on timely reperfusion of the affected coronary site, but reperfusion itself induces cell death through a toxic, ROS-mediated process. In this study, we determined whether the PrC-210 aminothiol ROS-scavenger could prevent ROS-induced damage in post-MI hearts. In a series of both in vitro and in vivo experiments, we show that: (a) in vitro, PrC-210 was the most potent and effective ROS-scavenger when functionally compared to eight of the most commonly studied antioxidants in the MI literature, (b) in vitro PrC-210 ROS-scavenging efficacy was both immediate (seconds) and long-lasting (hours), which would make it effective in both (1) real-time (seconds), as post-MI or cardiac surgery hearts are reperfused with PrC-210-containing blood, and (2) long-term (hours), as hearts are bathed with systemic PrC-210 after MI or surgery, (c) systemic PrC-210 caused a significant 36% reduction of mouse cardiac muscle death following a 45-minute cardiac IR insult; in a striking coincidence, the PrC-210 36% reduction in cardiac muscle death equals the 36% of the MI-induced cardiac cell death estimated 6 years ago by Ovize and colleagues to result from "reperfusion injury," (d) hearts in PrC-210-treated mice performed better than controls after heart attacks when functionally analyzed using echocardiography, and (e) the PrC-210 ROS-scavenging mechanism of action was corroborated by its ability to prevent >85% of the direct, H2O2-induced killing of neonate cardiomyocytes in cell culture. PrC-210 does not cause the nausea, emesis, nor hypotension that preclude clinical use of the WR-1065/amifostine aminothiol. PrC-210 is a highly effective ROS-scavenger that significantly reduces IR injury-associated cardiac cell death.
Insights
The novel aminothiol PrC-210 effectively scavenges reactive oxygen species (ROS), significantly reducing cardiac cell death from reperfusion injury after myocardial infarction (MI). This potent antioxidant shows promise for protecting hearts during and after cardiac events.
Area of Science:
- Cardiovascular Research
- Oxidative Stress Biology
- Pharmacology
Background:
- Myocardial infarction (MI) management relies on reperfusion, but this process paradoxically causes cell death via reactive oxygen species (ROS).
- Existing antioxidants often lack the potency or ideal pharmacokinetic profile for effective ROS scavenging in post-MI hearts.
- Reperfusion injury contributes significantly to overall cardiac cell death following ischemic events.
Purpose of the Study:
- To evaluate the efficacy of the aminothiol PrC-210 as a ROS-scavenger in preventing damage in post-myocardial infarction (MI) hearts.
- To compare PrC-210's ROS-scavenging potency against established antioxidants.
- To assess PrC-210's potential for both immediate and sustained ROS mitigation in cardiac ischemia-reperfusion (IR) injury.
Main Methods:
- In vitro comparison of PrC-210's ROS-scavenging activity against eight common antioxidants.
- In vivo assessment of PrC-210's effect on cardiac muscle death and function following induced IR injury in mice.
- Evaluation of PrC-210's protective mechanism against hydrogen peroxide (H2O2)-induced cardiomyocyte death in cell culture.
- Echocardiographic analysis of cardiac function in PrC-210 treated and control mice post-MI.
Main Results:
- PrC-210 demonstrated superior ROS-scavenging potency and efficacy compared to eight other antioxidants in vitro.
- In vivo studies showed PrC-210 significantly reduced cardiac muscle death by 36% following IR insult.
- PrC-210 treatment improved cardiac performance post-MI, as evidenced by echocardiography.
- PrC-210 prevented over 85% of H2O2-induced cardiomyocyte death in cell culture, confirming its ROS-scavenging mechanism.
Conclusions:
- PrC-210 is a potent and effective ROS-scavenger with immediate and long-lasting activity, suitable for real-time and long-term application in managing cardiac IR injury.
- Systemic administration of PrC-210 significantly reduces cardiac muscle death and improves cardiac function after MI.
- PrC-210 offers a promising therapeutic strategy for mitigating reperfusion injury without the adverse effects associated with other aminothiols.
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