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From Lab Formulation Development to CTM Manufacturing of KO-947 Injectable Drug Products: a Case Study and Lessons Learned.

Formulation development of KO-947-K mesylate injectable drug products was described. Solution formulations were initially attempted, and key parameters such as drug concentration, buffer, pH, complexing agent, and tonicity modifying agent were carefully evaluated in the lab setting, mainly focusing on solubility and chemical stability. A lead solution formulation was advanced to a scaleup campaign. An unexpected stability issue was encountered, and the root cause was attributed to the heterogeneous liquid freezing process of the formulated solution at -20°C, which had not been captured in the lab setting. A lyophilized product was then designed to overcome the issue and supplied to the phase I clinical trial.