CM93 Treatment in Subjects With Epidermal Growth Factor Receptor (EGFR)-Modified Recurrent Glioblastoma (rGBM)

CM93 is a third-generation, covalent/irreversible, brain penetrant small molecule Epidermal Growth Factor Receptor (EGFR) tyrosine kinase inhibitor. It is not a substrate of p-glycoprotein or breast cancer resistance protein (bcrp) and is a mild inhibitor of bcrp. It is a potent inhibitor of EGFR mutations but also has activity against wild type EGFR.

This first-in-human phase I trial will evaluate the safety, tolerability, and pharmacokinetics (PK) of CM93 and determine the recommended Phase 2 dose (RP2D) for further evaluation using a 3+3 design (Part 1). Once the RP2D has been determined 12 additional patients will be treated in a dose expansion cohort to confirm the safety and tolerability of the selected dose (Part 2). Subsequent to the phase I trial a window-of-opportunity surgical trial will initiate. Tumor from both contrast enhancing and non-contrast enhancing areas of patients who received CM93 before surgery will be resected and evaluated to determine if therapeutic concentrations of the drug are achieved. Pharmacodynamic studies will be conducted in tumor tissue from patients who received CM93 before surgery and the patients who did not receive drug before surgery to determine if there is adequate inhibition of EGFR. After recovery from surgery all 30 patients will receive CM93 until progression, development of unacceptable toxicity, or withdrawal of consent and preliminary evidence of activity will be obtained.