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- W2899687438 abstract "DNA damage caused by TMZ or RT sensitizes tumors to PARP inhibitors, especially in highly replicating tumors (eg, GBM). Pamiparib is a selective PARP1/2 inhibitor with potent PARP trapping that can cross the blood-brain barrier and has shown synergistic cytotoxicity with TMZ in nonclinical experiments. At 60mg BID, the human-equivalent dose-to-trough brain concentrations above the nonclinical efficacy threshold, pamiparib was generally well tolerated and showed antitumor activity in early clinical studies ({type:clinical-trial,attrs:{text:NCT02361723,term_id:NCT02361723}}NCT02361723; {type:clinical-trial,attrs:{text:NCT03333915,term_id:NCT03333915}}NCT03333915). This ongoing dose-escalation/expansion study ({type:clinical-trial,attrs:{text:NCT03150862,term_id:NCT03150862}}NCT03150862) will determine the safety/tolerability and antitumor effects of pamiparib (60mg BID)+RT and/or TMZ. The dose-escalation component consists of three arms. Arm A will establish tolerable duration of pamiparib (2, 4, 6 weeks)+RT in newly diagnosed GBM patients with unmethylated MGMT promoter (unmethyl-GBM). In Arm B, newly diagnosed patients with unmethyl-GBM will receive pamiparib+RT with increasing TMZ doses. Enrollment in Arm B will commence once RP2D for pamiparib+RT is established. In Arm C, patients with recurrent/refractory methylated- or unmethyl-GBM receive pamiparib with increasing TMZ doses. As of 28 March 2018, 15 patients were enrolled (A: 2-wk, n=3; 4-wk, n=6; C: TMZ [40mg], n=6). One DLT (grade 3 nausea) was reported in Arm C. Across arms, pamiparib-related AEs occurring in >3 patients were nausea (n=6) and fatigue (n=5). Two patients experienced three pamiparib-related AEs grade 3 (diarrhea [A: 4-wk, n=1]; fatigue and nausea [C: n=1]). All three resolved with concomitant medication and treatment interruption (A) or discontinuation (C). Of the seven patients with 1 tumor assessment, one (A: 4-wk) achieved an unconfirmed PR; four (A: 2-wk, n=2; 4-wk, n=2) had SD, and two (A: 2-wk, n=1; C: n=1) had PD. Preliminary data suggests pamiparib at 60mg BID is generally well tolerated by patients when administered 4 weeks concurrently with RT for newly diagnosed unmethyl-GBM and when combined with 40 mg TMZ for recurrent/refractory GBM." @default.
- W2899687438 created "2018-11-16" @default.
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- W2899687438 date "2018-11-01" @default.
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- W2899687438 title "ACTR-30. PHASE 1B/2 STUDY TO ASSESS THE CLINICAL EFFECTS OF PAMIPARIB (BGB-290) IN COMBINATION WITH RADIATION THERAPY (RT) AND/OR TEMOZOLOMIDE (TMZ) IN PATIENTS WITH NEWLY DIAGNOSED OR RECURRENT/REFRACTORY GLIOBLASTOMA (GBM)" @default.
- W2899687438 doi "https://doi.org/10.1093/neuonc/noy148.063" @default.
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