Effects of canagliflozin preconditioning on post-resuscitation myocardial function in a diabetic rat model of cardiac arrest and cardiopulmonary resuscitation

Eur J Pharmacol. 2024 Dec 18:988:177212. doi: 10.1016/j.ejphar.2024.177212. Online ahead of print.

Abstract

Background: Canagliflozin can reduce the risk of cardiovascular disease in patients except for its targeted antidiabetic effects. However, it remains unknown whether canagliflozin alleviates the post-resuscitation myocardial dysfunction (PRMD) in type 2 diabetes mellitus.

Objective: To explore the effects and potential mechanisms of canagliflozin on myocardial function after cardiac arrest (CA) and cardiopulmonary resuscitation (CPR) in a type 2 diabetic rat model.

Methods: Twenty-four type 2 diabetic rats were randomized into four groups: (1) sham + canagliflozin, (2) sham + placebo, (3) CPR + placebo, and (4) CPR + canagliflozin. Except for the sham + canagliflozin and placebo groups, both the CPR + placebo and canagliflozin groups underwent 8 min of CPR after the induction of ventricular fibrillation for 6 min. Myocardial function and hemodynamics were assessed at baseline and within 6 h after autonomous circulation (ROSC) return. Left ventricular tissues were sampled to determine the expressions of relevant proteins in the NLRP3 inflammasome pathway.

Results: The results demonstrated that the mean arterial pressure (MAP) was significantly improved in the CPR + canagliflozin group after ROSC compared with the CPR + placebo group (p < 0.05). Meanwhile, both ejection fraction (EF) and fraction shortening (FS) were dramatically increased in the CPR + canagliflozin group when compared with the CPR + placebo group at 2h, 4h, and 6h after ROSC (p < 0.05). In addition, the levels of NT-proBNP, cTn-I, and NLRP3 inflammatory inflammasome-associated proteins were significantly decreased in the CPR + canagliflozin group compared with the CPR + placebo group.

Conclusions: In type 2 diabetic rats, pretreatment of canagliflozin alleviates PRMD. The potential mechanisms may include inhibition of the NLRP3/caspase-1 signaling pathway.

Keywords: Canagliflozin; Cardiopulmonary resuscitation; Myocardial function; Post-resuscitation; Type 2 diabetes mellitus.