Study of the Poly (ADP-ribose) Polymerase-1 (PARP-1) Inhibitor BSI-201 in Patients With Newly Diagnosed Malignant Glioma

The phase I portion of study is designed to determine the Maximum Tolerated Dose (MTD) of BSI-201 with two clinically relevant dosing regimens of temozolomide (TMZ). Secondary objectives in the phase I trial include determining the PK of BSI-201 in malignant glioma patients and correlating BSI-201 PK with degree of PARP-1 inhibition. A safety run-in will confirm the safety of BSI-201 added to standard TMZ and radiation therapy and the phase II portion of the study will assess the efficacy and tolerability of the MTD dose of BSI-201 with daily TMZ and radiation therapy followed by adjuvant TMZ in patients with newly diagnosed GBM and assess overall survival as the primary outcome measure. Information on each phase of the study will be listed when each phase opens for enrollment. Based on data generated by BiPar/Sanofi, it is concluded that iniparib does not possess characteristics typical of the PARP inhibitor class. The exact mechanism has not yet been fully elucidated, however based on experiments on tumor cells performed in the laboratory, iniparib is a novel investigational anti-cancer agent that induces gamma-H2AX (a marker of DNA damage) in tumor cell lines, induces cell cycle arrest in the G2/M phase in tumor cell lines, and potentiates the cell cycle effects of DNA damaging modalities in tumor cell lines. Investigations into potential targets of iniparib and its metabolites are ongoing.