The role of the PD-1/PD-L1 immune checkpoint pathway in myocardial infarction: a review from pathophysiological mechanisms to therapeutic strategies

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Programmed cell death protein 1 (PD-1) and its ligand, programmed death-ligand 1 (PD-L1), are vital molecules in immune checkpoints, significantly impacting cancer treatment. Recent studies have increasingly highlighted the complex roles of the PD-1/PD-L1 pathway in cardiovascular diseases, particularly in myocardial infarction (MI). In addition to being involved in immune modulation and the inflammatory response post-myocardial ischemia, this pathway is also crucial for myocardial repair and regeneration. Additionally, the clinical application of PD-1/PD-L1 immune checkpoint inhibitors has led to groundbreaking advances in cancer treatment; however, concerns regarding cardiotoxicity and myocardial injury as adverse events have also been raised. This review systematically examines the pathophysiological mechanisms of the PD-1/PD-L1 pathway in myocardial infarction, explores its potential as a therapeutic target, and assesses the adverse cardiovascular reactions associated with existing immune checkpoint inhibitors and management strategies. The aim of this study was to provide a theoretical basis and clinical guidance for future immunotherapeutic approaches for treating myocardial infarction.

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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