Discovery of highly potent, lung-localized epithelial sodium channel inhibitors
Manoj Kumar1, Gustav Welzel1, Arnab K Chatterjee1
1California Institute for Biomedical Research (Calibr), 11119 North Torrey Pines Road, Suite 100, La Jolla, CA 92037, USA.
Abstract:
The design, synthesis and biological evaluation of novel dimeric pyrazinoylguanidines for the treatment of cystic fibrosis (CF) are reported herein. When administered directly to the lung in a guinea pig tracheal potential difference (TPD) model, the dimeric compounds were found to have superior potency, longer duration of action in the lung, and significantly reduced extra-pulmonary exposure in comparison to the corresponding monomeric ENaC blockers, which have been evaluated in the clinic but shown to have dose-limiting kidney toxicity.
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