Glutathione infusion before primary percutaneous coronary intervention: a randomised controlled pilot study

Area of Science:

• Cardiology
• Biochemistry
• Oxidative Stress Research

Background:

• Reperfusion injury in ST-elevation myocardial infarction (STEMI) is exacerbated by increased reactive oxygen species (ROS), particularly hydrogen peroxide (H2O2).
• H2O2 can damage cardiomyocytes and impair microcirculation, contributing to heart muscle damage.
• Glutathione (GSH), a potent antioxidant, has the potential to counteract these detrimental effects.

Purpose of the Study:

• To investigate the efficacy of prophylactic glutathione (GSH) infusion in mitigating H2O2-induced myocardial injury during reperfusion in STEMI patients.
• To assess the impact of GSH on oxidative stress markers and myocardial damage indicators.

Main Methods:

• Fifty STEMI patients undergoing primary angioplasty were randomized to receive GSH infusion or placebo.
• GSH was administered intravenously before reperfusion and continued for 72 hours.
• Measurements included H2O2 production, 8-iso-prostaglandin F2α (PGF2α), H2O2 breakdown activity (HBA), nitric oxide (NO) bioavailability, and cardiac troponin T (cTpT).

Main Results:

• The GSH group showed significantly reduced H2O2 production and 8-iso-PGF2α levels post-reperfusion compared to placebo.
• GSH infusion led to increased HBA and NO bioavailability.
• Reduced H2O2 production persisted for 5 days in the GSH group, correlating with lower cTpT levels.

Conclusions:

• Prophylactic and sustained GSH infusion effectively blunts H2O2 generation, suggesting improved myocardial cell survival in STEMI patients.
• Further large-scale trials are warranted to confirm these findings and evaluate clinical endpoints.