Abstract 15115: Efficacy and Safety of miR-132 Inhibitor CDR132L in Patients With Reduced Left Ventricular Ejection Fraction After Myocardial Infarction: Rationale for and Design of the HF-REVERT Trial

Background: Inhibition of miR-132 effectively prevents and reverses heart failure (HF) in relevant models, making it an attractive HF target. CDR132L is a synthetic antisense oligonucleotide (ASO) selectively blocking miR-132. Translational in vitro and in vivo studies have demonstrated meaningful efficacy of CDR132L on left ventricular (LV) structure and function. CDR132L was safe and well tolerated in a Phase 1b study in chronic HF patients. The indicative effects of the miR-132 inhibitor CDR132L may be particularly beneficial in patients with active adverse remodelling, e.g. after acute myocardial infarction with early decline in ejection fraction. These patients have been relatively understudied and therapeutic options are limited.

Method: The HF-REVERT (P

ase 2, Multicenter, Randomized, Parallel, 3-arm, Placebo-controlled Study to Assess E ficacy and Safety of CD 132L in Pati nts with Reduced Left entricular jection F ac ion (≤ 45%) after Myocardial Infarction; NCT05350969) is a proof-of-concept study to evaluate the efficacy of CDR132L in improving cardiac function and safety in patients with reduced LV ejection fraction (LVEF). HF-REVERT aims to assess the efficacy and safety of 5 mg/kg and 10 mg/kg CDR132L, given as 3 single intravenous doses administered 28 days apart as an add-on to standard-of-care treatment, in a larger cohort of patients (N = 280) with HF and reduced LVEF (≤ 45%) after MI with a follow-up of 10 months. Key inclusion criteria are the diagnosis of acute STEMI/NSTEMI and the development of systolic dysfunction (LVEF ≤ 45%) after MI index event and elevated N-terminal pro B-type natriuretic peptide (NT-proBNP). The study consists of a 6-month double-blind treatment period with a read out of the primary endpoint LVESVI (left ventricular end systolic volume index) followed by a 6-month open label observation period.

Discussion: The HF-REVERT trial currently tests CDR132L in patients with MI and systolic dysfunction. This trial may therefore underpin the concept of miR-132 inhibition to prevent/reverse cardiac remodeling in HF patients. The results will inform the design of a subsequent outcome trial to test the effect of CDR132L in HF patients.