Precision targeting of FDX1-mediated cuproptosis by a ROS-responsive hydrogel for myocardial ischemia-reperfusion injury treatment.

ABSTRACT: Rationale: Myocardial ischemia-reperfusion injury (MIRI) poses a critical clinical challenge due to intertwined oxidative stress and cuproptosis-driven cell death. Current therapies inadequately address dual-pathology mechanisms (ROS overproduction and copper dysregulation), while conventional drug delivery lacks spatiotemporal precision. Methods: A ROS-responsive hydrogel (OD@G4CAsi-FDX1) was engineered via dynamic Schiff base crosslinking between oxidized dextran (OD) and polyamidoamine dendrimers (PAMAM G4). The hydrogel co-encapsulates antioxidant caffeic acid (CA) and FDX1-targeted siRNA (si-FDX1). In vitro biocompatibility, ROS scavenging, and mitochondrial protection were assessed in primary cardiomyocytes. In vivo efficacy was evaluated in a murine MIRI

SUBMITTER: Hu J 

PROVIDER: S-EPMC12679365 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature