1. Academic Validation
  2. 1,4-Disubstituted Piperazin-2-Ones as Selective Late Sodium Current Inhibitors with QT Interval Shortening Properties in Isolated Rabbit Hearts

1,4-Disubstituted Piperazin-2-Ones as Selective Late Sodium Current Inhibitors with QT Interval Shortening Properties in Isolated Rabbit Hearts

  • J Med Chem. 2024 May 17. doi: 10.1021/acs.jmedchem.4c00677.
Hui Yang 1 Mengqin Jing 1 Chao Tian 1 Bingxun Li 2 Weiming Liao 1 Wei Wang 1 Yunzhe Li 1 Xiaowei Wang 1 Guifang Duan 1 Qi Sun 1 Zhuo Huang 1 3 Lin Wu 2 4
Affiliations

Affiliations

  • 1 State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
  • 2 Department of Cardiology, Peking University First Hospital, Beijing 100034, China.
  • 3 Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
  • 4 State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing 100191, China.
Abstract

Late sodium current (INa) inhibitors are a new subclass of antiarrhythmic agents. To overcome the drawbacks, e.g., low efficacy and inhibition effect on K+ current, of the FDA-approved late INa inhibitor ranolazine, chain amide 6a-6q, 1,4-disubstituted piperazin-2-ones 7a-7s, and their derivatives 8a-8n were successively designed, synthesized, and evaluated in vitro on the NaV1.5-transfected HEK293T cells by the whole-cell patch clamp recording assay at the concentration of 40 μM. Among the new skeleton compounds, 7d showed the highest efficacy (IC50 = 2.7 μM) and good selectivity (peak/late ratio >30 folds), as well as excellent pharmacokinetics properties in mice (T1/2 of 3.5 h, F = 90%, 3 mg/kg, po). It exhibited low hERG inhibition and was able to reverse the ATX-II-induced augmentation of late INa phenotype of LQT3 model in isolated rabbit hearts. These results suggest the application potentials of 7d in the treatments of arrhythmias related to the enhancement of late INa.

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