Cardiac ischemic damage and inevitable fibrosis are the main threats in cardiovascular illnesses [1], [2], [3]. Though the intervention of acute cardiac ischemia primarily entails reperfusion therapies to revive blood circulation [4], ongoing post-ischemic myocardial harm stays a problem and is accompanied with injury-induced fibrosis, irreversibly resulting in coronary heart failure and requiring long-term or lifelong administration (Fig. S1) [5], [6], [7]. Efficient post-ischemic cardiac administration thus requires an built-in strategy addressing each myocardial oxidative harm and fibrosis to revive cardiac operate and promote cardiac restore [8].
Reactive oxygen species (ROS) are acknowledged as key contributors in inducing post-ischemic cardiac damage [9], [10]. Cardiac ischemia-reoxygenation results in the overproduction of ROS in cardiomyocytes, which disrupts the redox homeostasis and triggers apoptosis/ferroptosis of cardiomyocytes, resulting in myocardial harm [11]. Throughout the fibrosis course of, cardiac fibroblasts bear metabolic reprogramming and phenotypic polarization in response to varied profibrotic indicators [12], [13], [14]. Moreover, ROS facilitate each feedforward and suggestions regulation of profibrotic indicators, together with reworking development factor-β (TGF-β) and extracellular matrix (ECM) mechanical signaling [15], [16], [17], [18], [19], [20]. Given the pivotal roles of ROS in each post-ischemic myocardial damage and fibrosis, ROS modulation could also be an efficient measure for bridging cardioprotective and antifibrotic results in post-ischemic cardiac damage, and the pursuit of environment friendly antioxidation approaches to scavenge extreme myocardial ROS, is significant to realize concurrent cardioprotection and antifibrosis for improved therapeutic final result.
Nanocatalytic drugs has been developed within the latest years, which goals to make use of nanocatalysts to set off in situ catalytic reactions on the illness websites, for effectively regulating the concentrations of ROS for therapeutic purposes [21]. Such a nanocatalytic therapeutic strategy has been extensively investigated in tumor remedy, by utilizing nanocatalysts to catalyze ROS technology for initiating oxidative harm of most cancers cells [22]. Impressed by this catalytic technique, together with the consideration of oxidative function of post-ischemic cardiac damage, it’s conceived that, if nanocatalysts with catalytic antioxidative actions could possibly be launched in myocardial areas, the catalytic antioxidation reactions could possibly be trigged to successfully scavenge pathological ROS. This technique, if relevant, orchestrates therapeutic results in each cardiomyocytes and fibroblasts, coupling two organic processes for synergistic cardiac restore.
On this work, a nanocatalytic antioxidation therapeutic methodology is proposed for the remedy of post-ischemic cardiac damage (Fig. 1). Zeolitic imidazolate framework-67 nanoparticle (ZIF-67 NP) is used as a paradigmatic antioxidative nanocatalyst, which options intrinsically enriched Co-N4 catalytic facilities that may effectively catalyze the disproportionation of hydrogen peroxide (H2O2) (will be thought of as a catalase-like nanozyme). In myocardial area, the nanocatalytic antioxidation impact permits cell-specific differential regulation primarily based on the distinct oxidative stress responses of cardiomyocytes and fibroblasts [23]. In cardiomyocytes, the antioxidative nanocatalysts can effectively mitigate oxidative stress, restoring redox homeostasis to inhibit apoptosis and ferroptosis. In fibroblasts, the antioxidative nanocatalysts block downstream ROS-dependent fibrotic signaling pathways, reverse fibroblast activation, and reprogram them right into a quiescent state on the transcriptional degree, specifically fibroblast-to-myofibroblast transition (FMT) deactivation. In vivo experiments additional show the numerous efficacy of nanocatalytic antioxidation in assuaging post-ischemic oxidative damage and fibrosis. Our work gives a cooperative technique for cardiac restore by way of a nanocatalytic antioxidation-enabled coupling modulation strategy.
