The apelinergic system includes a series of endogenous peptides apelin, ELABELA/TODDLER and their 7-transmembrane G-protein coupled apelin receptor (APJ, AGTRL-1, APLNR). The APJ receptor is an attractive therapeutic target because of its involvement in cardiovascular diseases and potentially other disorders including liver fibrosis, obesity, diabetes, and neuroprotection. To date, pharmacological characterization of the APJ receptor has been limited due to the lack of small molecule functional agonists or antagonists. Through focused screening we identified a drug-like small molecule agonist hit 1 with a functional EC50 value of 21.5±5μM and binding affinity (Ki) of 5.2±0.5μM. Initial structure-activity studies afforded compound 22 having a 27-fold enhancement in potency and the first sub-micromolar full agonist with an EC50 value of 800±0.1nM and Ki of 1.3±0.3μM. Preliminary SAR, synthetic methodology, and in vitro pharmacological characterization indicate this scaffold will serve as a favorable starting point for further refinement of APJ potency and selectivity.
Discovery of a novel small molecule agonist scaffold for the APJ receptor
Narayanan, S., Maitra, R., Deschamps, J., Bortoff, K., Thomas, J., Zhang, Y., Warner, K., Vasukuttan, V., Decker, A., & Runyon, S. (2016). Discovery of a novel small molecule agonist scaffold for the APJ receptor. Bioorganic and Medicinal Chemistry, 24(16), 3758-3770. https://doi.org/10.1016/j.bmc.2016.06.018, https://doi.org/10.1016/j.bmc.2016.06.018
To contact an RTI author, request a report, or for additional information about publications by our experts, send us your request.
Spatiotemporal trends in three smoothed overdose death rates in US counties, 2012-2020
Improving text classification with Boolean retrieval for rare categories
COVID-19 diagnosis and SARS-CoV-2 strain identification by a rapid, multiplexed, point-of-care antibody microarray