Conditions: Solid Tumors
Allocation: NON_RANDOMIZED | Intervention model: SEQUENTIAL
Enrollment: 206
Healthy volunteers: no

Brief summary:
This study will investigate the safety, tolerability, pharmacokinetic (PK), and pharmacodynamic (PD) activity of adavosertib, both as monotherapy and in combination with gemcitabine, cisplatin, or carboplatin in participants with advanced solid tumors. Dose limiting toxicities (DLT) of adavosertib in combination with gemcitabine, cisplatin, or carboplatin will also be assessed. The primary hypotheses of the study are as follows: 1) Oral administration of adavosertib both as monotherapy and in combination with either gemcitabine, cisplatin, or carboplatin in patients with advanced solid tumors will be safe and tolerable, 2) The side effects observed in participants with advanced solid tumors after administration of adavosertib combined with each of the chemotherapies (gemcitabine, cisplatin and carboplatin) will allow for the definition of a single dose combination Maximum Administered Dose (MAD)/Maximum Tolerated Dose (MTD) and a multiple dose combination Biologically Effective Dose (BED)/MTD for each of the 3 combinations, 3) At a tolerated dose, adavosertib plasma exposure will exceed target thresholds established in preclinical models, and 4) At a tolerated dose, PD markers of adavosertib activity in combination with either gemcitabine, cisplatin, or carboplatin (in surrogate tissue and/or tumor) will meet or exceed the target threshold established in preclinical models.

Detailed description:
Part 1 consists of single dose adavosertib monotherapy. If well tolerated, participants in Part 1 will continue on to one of three treatment arms in Part 2-A which consists of a single lower dose of adavosertib in combination with standard chemotherapy: 1) Adavosertib +Gemcitabine (1000 mg/m\^2), 2) Adavosertib + Cisplatin (75 mg/m\^2) or 3) Adavosertib +Carboplatin at an area under the time curve concentration of 5 mg/min/ml (AUC5). Following completion of Part 2-A, adavosertib will be administered twice daily (BID) for 2.5 days (multi-dose) starting concomitantly with each administration of chemotherapy in Part 2-B. After a preliminary combination MTD of adavosertib and chemotherapy has been established in Part 2B, the MTD confirmation expansion will occur in Part 3.

Arms:
arm 1: Participants received adavosertib 325 mg, orally, on Day 1. arm 2: Participants received adavosertib 650 mg, orally, on Day 1. arm 3: Participants received adavosertib 1300 mg, orally, on Day 1. arm 4: Participants received gemcitabine 1000 mg/m\^2 as an intravenous (IV) infusion on Days 1, 8, and 15 in each 4-week cycle plus adavosertib 100 mg single dose, orally, on Day 2 of each cycle. arm 5: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion on Days 1, 8, and 15 in each 4-week cycle plus adavosertib 200 mg single dose, orally, on Day 2 of each cycle. arm 6: Participants received cisplatin 75 mg/ m\^2 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 100 mg single dose orally, on Day 2 of each cycle. arm 7: Participants received cisplatin 75 mg/ m\^2 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 200 mg single dose orally, on Day 2 of each cycle. arm 8: Participants received carboplatin at an area under the time curve concentration of 5 mg/min/ml (AUC5) as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 100 mg single dose orally, on Day 2 of each cycle. arm 9: Participants received carboplatin AUC5 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 200 mg single dose orally, on Day 2 of each cycle. arm 10: Participants received carboplatin AUC5 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 325 mg single dose orally, on Day 2 of each cycle. arm 11: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion on Days 1, 8, and 15 of each 4-week cycle plus adavosertib 25 mg orally twice daily (BID) for 2.5 days, starting concomitantly with the IV infusion of gemcitabine on Day 1 and followed by 4 additional doses of adavosertib 25 mg at approximately 12 hour intervals on Days 1-3, 8-9, and 15-17 of each cycle. arm 12: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion on Days 1, 8, and 15 of each 4 week cycle plus adavosertib 50 mg orally BID for 2.5 days, starting concomitantly with the IV infusion of gemcitabine on Day 1 and followed by 4 doses of adavosertib 25 mg at approximately 12 hour intervals on Days 1-3, 8-9, and 15-17 of each 4 week cycle. arm 13: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion given once weekly for 3 consecutive weeks of a 4 week cycle plus adavosertib 50 mg orally BID for 2.5 days, starting concomitantly with the IV infusion of gemcitabine on Day 1 and followed by 4 additional doses of adavosertib 50 mg at approximately 12 hour intervals on Days 1-3, 8-9, and 15-17 of each 4 week cycle. arm 14: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion on Days 1, 8, and 15 of each 4 week cycle plus adavosertib 100 mg orally once daily (QD) on Days 1, 2, 8, 9, 15, and 16 of each 4 week cycle. arm 15: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion on Days 1, 8, and 15 of each 4 week cycle plus adavosertib 125 mg orally QD on Days 1, 2, 8, 9, 15, and 16 of each 4 week cycle. arm 16: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion on Days 1, 8, and 15 of each 4 week cycle plus adavosertib 150 mg orally QD on Days 1, 2, 8, 9, 15, and 16 of each 4 week cycle. arm 17: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion given on Days 1, 8, and 15 of each 4 week cycle plus adavosertib 175 mg orally QD on Days 1, 2, 8, 9, 15, and 16 of each 4 week cycle. arm 18: Participants received gemcitabine 1000 mg/m\^2 as an IV infusion on Days 1, 8, and 15 of each 4 week cycle plus adavosertib 200 mg orally QD on Days 1, 2, 8, 9, 15, and 16 of each 4 week cycle. arm 19: Participants received cisplatin 75 mg/ m\^2 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 50 mg orally BID for 2.5 days, starting concomitantly with the administration of cisplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 20: Participants received cisplatin 75 mg/ m\^2 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 100 mg orally BID for 2.5 days, starting concomitantly with the administration of cisplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 21: Participants received cisplatin 75 mg/ m\^2 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 125 mg orally BID for 2.5 days, starting concomitantly with the administration of cisplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 22: Participants received cisplatin 75 mg/ m\^2 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 150 mg orally BID for 2.5 days, starting concomitantly with the administration of cisplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 23: Participants received cisplatin 75 mg/ m\^2 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 200 mg orally BID for 2.5 days, starting concomitantly with the administration of cisplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 24: Participants received cisplatin 75 mg/ m\^2 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 250 mg orally BID for 2.5 days, starting concomitantly with the administration of cisplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 25: Participants received carboplatin AUC 5 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 75 mg orally BID for 2.5 days, starting concomitantly with the administration of carboplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 26: Participants received carboplatin AUC 5 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 150 mg orally BID for 2.5 days, starting concomitantly with the administration of carboplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 27: Participants received carboplatin AUC 5 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 225 mg orally BID for 2.5 days, starting concomitantly with the administration of carboplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle. arm 28: Participants received carboplatin AUC 5 as an IV infusion on Day 1 of each 3 week cycle plus adavosertib 325 mg orally BID for 2.5 days, starting concomitantly with the administration of carboplatin on Day 1 and then at 12 hour intervals on Days 1-3 of each 3 week cycle.

Interventions: intervention 1: adavosertib intervention 2: gemcitabine intervention 3: cisplatin intervention 4: carboplatin
Intervention descriptions: intervention 1: adavosertib administered as an oral formulation as either monotherapy or in combination with either gemcitabine, cisplatin, or carboplatin. intervention 2: Gemcitabine administered at 1000 mg/m\^2 by IV infusion in a 28-day cycle. intervention 3: Cisplatin administered at 75 mg/m\^2 by IV infusion in a 21-day cycle. intervention 4: Carboplatin administered at AUC/time curve of 5 mg/min/mL (AUC5) by IV infusion in a 21-day cycle.

Protocol document: