Evaluating BMX-001 Efficacy: A SOD2 Mimetic Approach to Mitigate Myocardial Ischemia- Reperfusion Damage

Overview

Background: Myocardial ischemia-reperfusion (I/R) injury, a critical cardiac complication, is characterized by an excessive generation of reactive oxygen species (ROS) during heart reoxygenation. This leads to lipid peroxidation and subsequent cellular damage, primarily mediated by 4-Hydroxynonenal (4-HNE). The natural defense mechanism, like SOD2, a superoxide dismutase, is often insufficient agains t this ROS surge. This study evaluates the effectiveness of BMX -001 (MnTnBuOE-2-PyP5+), a SOD2 mimetic, in reducing oxidative stress in H9c2 cardiomyocytes subjected to hypoxia/reoxygenation (H/R) injury. Methods: We used an in vitro model to simulate I/Rinjury in H9c2 cardiomyocytes. After 4 hours of oxygen deprivation and 24 hours of reoxygenation, cell viability was assessed using the Evans Blue exclusion method. Two concentrations of BMX-001 were tested, with 10 µL selected for optimal cardioprotection. The treatment's impact on intracellular superoxide levels was quantified using HPLC post-DHE treatment. Results: H/Rinjury significantly increased intracellular and mitochondrial superoxide, as well as 4 -HNE levels, indicating oxidative stress and lipid peroxidation (p<0.05). BMX-001 treatment resulted in a notable reduction in these oxidative markers (p<0.01). Furthermore, BMX-001 pre-treatment significantly mitigated H/R-induced cardiomyocyte apoptosis, improved mitochondrial function in terms of oxygen consumption, and decreased cardiolipin peroxidation and 4-HNE associated proteins (p<0.05). Conclusion: This study reveals BMX -001's efficacy in diminishing oxidative stress markers in H9c2 cells during I/Rconditions, highlighting its therapeutic potential in cardiovascular diseases driven by oxidative stress. BMX -001, as a SOD2 mimetic, demonst rates significant promise in enhancing cardiomyocyte resilience and treating heart diseases associated with oxidative stress.

Competition history

• JSHS 2024 Category not listed

Resources

• National JSHS abstract book ↗

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