Data from Ph 1/2 APEX-01 Dose Escalation Study of ARX517 in mCRPC announced

“We continue to observe no DLTs or SAEs at the highest ARX517 dose tested. We believe this is a direct result of the stability of conjugation supported by PK data presented at ESMO last month. While we are opportunely positioned to explore higher doses, we have already observed significant PSA50 decline and long duration on treatment at 2.0 mg/kg,” said Sandra Aung, Ph.D., Chief Clinical Officer of Ambrx. “The high interest in our PSMA-targeting ADC and pace of enrollment in the APEX-01 study has been outstanding and based on this we are anticipating to reach a recommended phase 2 dose by early next year.”

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