Glyceraldehyde derivatives inspired by empagliflozin as potential anti-heart failure agents independent of glucose-lowering effects

Abstract

Sodium-glucose cotransporter 2 inhibitors are a class of glucose-lowering drugs known for robust cardiovascular protective properties. However, the side effects induced by Sodium-glucose cotransporter 2 inhibition limit application in cardiovascular medicine. Our prior research showed that thoughtful structural modifications can dissociate the anti-heart failure activity from glucose-lowering effects. Moreover, we showed that the glyceraldehyde derivative, JX22, developed by scaffold hopping from empagliflozin, exhibits a superior cardiomyocyte protective effect, albeit with increased cytotoxicity compared to empagliflozin. In the current study systematic structural modifications of JX22 were performed to enhance anti-heart failure efficacy and safety, while reducing glucose-lowering activity. Twenty glyceraldehyde-based derivatives were synthesized and compound 12 emerged as an optimal candidate by exhibiting an improved cytoprotective effect compared to JX22. Compound 12 significantly inhibited the activity of NHE1 on the myocardial membrane, thereby maintaining intracellular ion homeostasis. In vivo efficacy results demonstrated that compound 12 at 10 mg/kg significantly ameliorated cardiac dysfunction, myocardial fibrosis, and exercise tolerance in isoproterenol-induced heart failure mice without a glucose-lowering effect. Furthermore, compound 12 exhibited favorable safety profiles in single-dose toxicity and hERG inhibition tests, along with promising pharmacokinetic properties in mice. The current study not only underscores the potential of compound 12 for further investigation but also highlights the effectiveness of the scaffold hopping strategy.