Dose Selection of BI 765423 for Phase II Study in Idiopathic Pulmonary Fibrosis (IPF) Using PK–Target Engagement Modeling
Rena Eudy-Byrne¹, Elias Clark¹, Sabrina Wiebe², Giselle Benitez³, Julia Korell¹,³*, Nina Patel³, Fenglei Huang³
¹Metrum Research Group, Boston, MA, USA; ²Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany; ³Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT, USA
Presented at the 2026 American Conference on Pharmacometrics (ACoP 2026), an International Conference on Pharmacometrics in the US (ICoP – US), on October 12, 2026.
BI 765423 is a humanized monoclonal antibody targeted to block soluble IL-11 and is currently in development for the treatment of idiopathic pulmonary fibrosis (IPF). Our objective was to recommend a Phase II dosing regimen that results in 90% target engagement (TE) in at least 80% of patients at steady-state.