4.5 Article

Discovery of GNE-502 as an orally bioavailable and potent degrader for estrogen receptor positive breast cancer

Journal

BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 50, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2021.128335

Keywords

GNE-502; Estrogen receptor; Fulvestrant; GNE-149

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Researchers aimed to develop an orally bioavailable drug with a dual mechanism of action similar to Fulvestrant, in order to overcome the limitations of intramuscular injections required for Fulvestrant dosing. They made progress and developed a new lead compound, GNE-502, which addressed some of the issues with the previously reported GNE-149.
Fulvestrant is an FDA-approved drug with a dual mechanism of action (MOA), acting as a full antagonist and degrader of the estrogen receptor protein. A significant limitation of fulvestrant is the dosing regimen required for efficacy. Due to its high lipophilicity and poor pharmacokinetic profile, fulvestrant needs to be administered through intramuscular injections which leads to injection site soreness. This route of administration also limits the dose and target occupancy in patients. We envisioned a best-in-class molecule that would function with the same dual MOA as fulvestrant, but with improved physicochemical properties and would be orally bioavailable. Herein we report our progress toward that goal, resulting in a new lead GNE-502 which addressed some of the liabilities of our previously reported lead molecule GNE-149.

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