Study of Orally Administered MOMA-313 in Participants With Advanced or Metastatic Solid Tumors

MOMA-313 is a novel therapeutic agent designed to target homologous recombination (HR)-deficient cancers by inhibiting DNA polymerase theta. MOMA-313 is being developed as a single-agent and in combination with a poly (adenosine diphosphate ribose) polymerase (PARP) inhibitor in patients with HR-deficient advanced (including locally), relapsed or metastatic solid tumors. This phase 1, first-in-human, open-label study of MOMA-313 is primarily intended to evaluate the safety and tolerability of MOMA-313 when administered orally as a single agent (Treatment Arm 1) or in combination with olaparib (Treatment Arm 2). Each treatment arm of the study includes a dose-escalation phase followed by a dose-optimization phase. In the dose-escalation phase of each treatment arm, successive cohorts of patients will receive increasing oral doses of MOMA-313 as a single agent or in combination with olaparib to determine the presumptive optimal biologic dose(s) (OBD) in this population. The dose-optimization phase of each arm will enroll additional patients to support the confirmation of the OBD. The data from this study conducted in patients with HR-deficient advanced (including locally), relapsed or metastatic solid tumors, including safety, tolerability, PK/PDx findings, and antitumor activity, will form the basis for subsequent clinical development of MOMA-313 as a single-agent and in combination with olaparib.