Structural and clinical characterization of CYP11B2 inhibition by dexfadrostat phosphate
A new open-access publication
The final three steps of the biosynthetic pathway of aldosterone are catalyzed by CYP11B2, also known as aldosterone synthase. Hence, inhibiting aldosterone synthase is a targeted mechanism for new therapeutic compounds aimed at reducing aldosterone production. In a new publication by Pignatti et al. the authors reveal that the novel aldosterone synthase inhibitor, dexfadrostat phosphate, aligns with the catalytic moiety of CYP11B2 but not CYP11B1, a related enzyme in the biosynthetic pathway of cortisol. Additionally, both in vitro and clinically, dexfadrostat phosphate demonstrated significant inhibition of CYP11B2 vs. CYP11B1 and did not change basal cortisol levels. Importantly, dexfadrostat phosphate inhibits the final steps in aldosterone biosynthesis, leading to dose-dependent reductions in aldosterone in healthy volunteers.
Pignatti et al., Journal of Steroid Biochemistry and Molecular Biology. 2023; 235.
Doi: 10.1016/j.jsbmb.2023.10640. Online ahead of print.