Study Of Axitinib In Combination With Cisplatin And Capecitabine In Patients With Advanced Gastric Cancer

DLT = Grade (GR) 2 proteinuria; GR3 nonhematological toxicity (NHT) (excluding alopecia and those that can be controlled with appropriate treatment) for greater than or equal to (\>=)7 days, GR3 thrombocytopenia with active bleeding; GR \>=3 febrile neutropenia (NP) or NP infection; GR 3 or 4 nausea, vomiting or diarrhea despite anti-emetics, anti-diarrheals; GR4 NHT, thrombocytopenia, NP for \>=7 days; \>= 1/2 teaspoon per day hemoptysis; any treatment related toxicity with \>3 consecutive days of capecitabine or 5 consecutive days of axitinib missed doses per cycle; delayed toxicity recovery \>14 days.

Time frame: Baseline up to Day 21 of Cycle 1

Population: DLT analysis set: participants who received first cycle of study treatment and did not temporarily or permanently discontinue or miss more than 5 consecutive days of axitinib (AG-13736) or more than 3 consecutive days of capecitabine for reasons other than DLTs within first cycle.

Clearance (CL) of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed (F). Clearance is defined as the volume of blood from which drug can be completely removed per unit of time. CL/F for axitinib in absence of chemotherapy (axitinib alone) was evaluated on Cycle 1 Day -1 and in combination with chemotherapy on Cycle 1 Day 1. CL/F for capecitabine in presence of steady-state axitinib was evaluated on Cycle 1 Day 1 and in absence of axitinib (capecitabine alone) on Cycle 2 Day 1.

Time frame: 0 (pre-dose), 1, 2, 3, 4, 6, 8 hrs post-axitinib dose on C1D-1, C1D1; 0 (pre-dose), 0.25, 0.5, 1, 2, 3, 4, 6, 8 hrs post-capecitabine dose on C1D1, C2D1

Population: Pharmacokinetic parameter analysis set. 'N' (number of participants analyzed) signifies those participants who were evaluable for this measure. 'n' = participants evaluable for specified study drug's PK parameter alone or in combination. Results are not reported for capecitabine metabolites because CL/F could not be accurately estimated.

Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Vz/F is influenced by the fraction absorbed. Vz/F for axitinib in absence of chemotherapy (axitinib alone) was evaluated on Cycle 1 Day -1 and in combination with chemotherapy on Cycle 1 Day 1. Vz/F for capecitabine in presence of steady-state axitinib was evaluated on Cycle 1 Day 1 and in absence of axitinib (capecitabine alone) on Cycle 2 Day 1.

Time frame: 0 (pre-dose), 1, 2, 3, 4, 6, 8 hrs post-axitinib dose on C1D-1, C1D1; 0 (pre-dose), 0.25, 0.5, 1, 2, 3, 4, 6, 8 hrs post-capecitabine dose on C1D1, C2D1

Population: Pharmacokinetic parameter analysis set. 'N' (number of participants analyzed) signifies those participants who were evaluable for this measure. 'n' = participants evaluable for specified study drug's PK parameter alone or in combination. Results are not reported for capecitabine metabolites because Vz/F could not be accurately estimated.

AUC (0 - ∞) = Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) extrapolated to infinite time (0 - ∞). It is obtained from AUC (0 - t) plus AUC (t - ∞). AUC (0 - ∞) for axitinib in absence of chemotherapy (axitinib alone) was evaluated on Cycle 1 Day -1 and in combination with chemotherapy on Cycle 1 Day 1. AUC (0 - ∞) for cisplatin (assessed by estimating total platinum in plasma ultrafiltrate), capecitabine and capecitabine's metabolites (5-FU, 5-DFUR and 5-DFC) in presence of steady-state axitinib were evaluated on Cycle 1 Day 1 and in absence of axitinib (cisplatin/capecitabine alone) on Cycle 2 Day 1. Results for axitinib were normalized to axitinib 5 mg dose, results for capecitabine and its metabolites (5-FU, 5-DFUR and 5-DFC) were normalized to Cycle 1 Day 1 capecitabine dose and results for cisplatin were normalized to Cycle 1 Day 1 cisplatin dose.

Time frame: 0 (pre-dose), 1, 2, 3, 4, 6, 8 hrs post-axitinib dose on C1D-1, C1D1; 0 (pre-dose), 0.25, 0.5, 1, 2, 3, 4, 6, 8 hrs post-capecitabine dose C1D1, C2D1; 0 (pre-dose), 0.5, 1, 2, 3, 4, 6, 8 hrs post-cisplatin infusion start C1D1, C2D1

Population: Pharmacokinetic parameter analysis set. Here, 'N' (number of participants analyzed) signifies those participants who were evaluable for this measure. Here, 'n' signifies those participants who were evaluable for specified study drug's PK parameter alone or in combination.

AUC (0-24) = Area under the plasma concentration versus time curve from time zero (pre-dose) to 24 hours. AUC (0-24) for axitinib in absence of chemotherapy (axitinib alone) was evaluated on Cycle 1 Day -1 and in combination with chemotherapy on Cycle 1 Day 1. Results for axitinib were normalized to axitinib 5 mg dose.

Time frame: 0 (pre-dose), 1, 2, 3, 4, 6, 8 hrs post-axitinib dose on C1D-1, C1D1

Population: Pharmacokinetic parameter analysis set included all treated participants who had at least 1 estimated pharmacokinetic parameter of primary interest. Here, 'N' (number of participants analyzed) signifies those participants who were evaluable for this measure.

Area under the plasma concentration time-curve from zero to the last measurable concentration (AUClast). AUClast for cisplatin (assessed by estimating total platinum in plasma ultrafiltrate), capecitabine and capecitabine's metabolites (5-FU, 5-DFUR, 5-DFC) in presence of steady-state axitinib were evaluated on Cycle 1 Day 1 and in absence of axitinib (cisplatin/capecitabine alone) on Cycle 2 Day 1. Results for capecitabine and its metabolites (5-FU, 5-DFUR and 5-DFC) were normalized to Cycle 1 Day 1 capecitabine dose and results for cisplatin were normalized to Cycle 1 Day 1 cisplatin dose.

Time frame: 0 (pre-dose), 0.25, 0.5, 1, 2, 3, 4, 6, 8 hrs post-capecitabine dose C1D1, C2D1; 0 (pre-dose), 0.5, 1, 2, 3, 4, 6, 8 hrs post-cisplatin infusion start C1D1, C2D1

Population: Pharmacokinetic parameter analysis set included all treated participants who had at least 1 estimated pharmacokinetic parameter of primary interest. Here, 'N' (number of participants analyzed) signifies those participants who were evaluable for this measure.

Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood. It is defined as the volume of blood from which drug can be completely removed per unit of time. Clearance for cisplatin (assessed by estimating total platinum in plasma ultrafiltrate) in presence of steady-state axitinib was evaluated on Cycle 1 Day 1 and in absence of axitinib (cisplatin alone) on Cycle 2 Day 1.

Time frame: 0 (pre-dose), 0.5, 1, 2, 3, 4, 6, 8 hrs post-cisplatin infusion start on C1D1, C2D1

Population: Pharmacokinetic parameter analysis set included all treated participants who had at least 1 estimated pharmacokinetic parameter of primary interest. Here, 'N' (number of participants analyzed) signifies those participants who were evaluable for this measure.

Genetic variants of uridine diphosphate (UDP)- glucuronosyl transferase 1A1 (UGT1A1) gene which were assessed for genotyping included UGT1A1\*60, UGT1A1-3156, UGT1A1 Promoter thymine adenine (TA) repeat (UGT1A1\*28, UGT1A1\*36, UGT1A1\*37), UGT1A1\*6 and UGT1A1\*27.

Time frame: Day 1 of Cycle 1

Population: Results are not reported because data was reported in individual participant listing but not statistically summarized for the analysis.

Time in months from the first documentation of objective tumor response to objective tumor progression or death due to any cause. Duration of tumor response was calculated as (the date of the first documentation of objective tumor progression or death minus the date of the first CR or PR that was subsequently confirmed plus 1) divided by 30.4. DR was calculated for the subgroup of participants with a confirmed objective tumor response. CR = disappearance of all target lesions. PR = at least 30% decrease in sum of the longest dimensions of target lesions taking the baseline sum of the longest dimensions as a reference.

Time frame: Baseline up to disease progression or withdrawal, assessed on Day 21 of every other cycle starting from Cycle 2 up to Day 784

Population: Analysis set included a subset of efficacy analysis set who had confirmed objective tumor response.

Cmax for axitinib in absence of chemotherapy (axitinib alone) was evaluated on Cycle 1 Day -1 and in combination with chemotherapy on Cycle 1 Day 1. Cmax for cisplatin (assessed by estimating total platinum in plasma ultrafiltrate), capecitabine and capecitabine's metabolites (5-fluorouracil \[5-FU\], 5-deoxy-5-fluorouridine \[5-DFUR\] and 5-deoxy-5-fluorocytidine \[5-DFC\]) in presence of steady-state axitinib were evaluated on Cycle 1 Day 1 and in absence of axitinib (cisplatin/capecitabine alone) on Cycle 2 Day 1. Results for axitinib were normalized to axitinib 5 mg dose, results for capecitabine and its metabolites (5-FU, 5-DFUR and 5-DFC) were normalized to Cycle 1 Day 1 capecitabine dose and results for cisplatin were normalized to Cycle 1 Day 1 cisplatin dose.

Time frame: 0 (pre-dose), 1, 2, 3, 4, 6, 8 hrs post-axitinib dose on Cycle 1 (C1) Day -1 (D-1), C1D1; 0 (pre-dose), 0.25, 0.5, 1, 2, 3, 4, 6, 8 hrs post-capecitabine dose C1D1, C2D1; 0 (pre-dose), 0.5, 1, 2, 3, 4, 6, 8 hrs post-cisplatin infusion start C1D1, C2D1

Population: Pharmacokinetic parameter analysis set included all treated participants who had at least 1 estimated pharmacokinetic parameter of primary interest. Here, 'n' signifies those participants who were evaluable for specified study drug's PK parameter alone or in combination.

Number of participants with objective response based assessment of confirmed complete response (CR) or confirmed partial response (PR) according to Response Evaluation Criteria in Solid Tumors (RECIST). Confirmed response are those that persist on repeat imaging study at least 4 weeks after initial documentation of response. CR are those with disappearance of all target lesions. PR are those with at least 30 percent (%) decrease in sum of the longest dimensions of target lesions taking the baseline sum of the longest dimensions as a reference.

Time frame: Baseline up to disease progression or withdrawal, assessed on Day 21 of every other cycle starting from Cycle 2 up to Day 784

Population: Efficacy analysis set included all enrolled participants who received at least 1 dose of study medication, had measurable disease at baseline (according to RECIST criteria version 1.0), and had at least 1 tumor assessment during study.

Plasma decay half-life is the time measured for the plasma concentration to decrease by one half. Plasma decay half life for axitinib in absence of chemotherapy (axitinib alone) was evaluated on Cycle 1 Day -1 and in combination with chemotherapy on Cycle 1 Day 1. Plasma decay half life for cisplatin (assessed by estimating total platinum in plasma ultrafiltrate), capecitabine and capecitabine's metabolites (5-FU, 5-DFUR and 5-DFC) in presence of steady-state axitinib were evaluated on Cycle 1 Day 1 and in absence of axitinib (cisplatin/capecitabine alone) on Cycle 2 Day 1.

Time frame: 0 (pre-dose), 1, 2, 3, 4, 6, 8 hrs post-axitinib dose on C1D-1, C1D1; 0 (pre-dose), 0.25, 0.5, 1, 2, 3, 4, 6, 8 hrs post-capecitabine dose C1D1, C2D1; 0 (pre-dose), 0.5, 1, 2, 3, 4, 6, 8 hrs post-cisplatin infusion start C1D1, C2D1

Population: Pharmacokinetic parameter analysis set. Here, 'N' (number of participants analyzed) signifies those participants who were evaluable for this measure. Here, 'n' signifies those participants who were evaluable for specified study drug's PK parameter alone or in combination.

Time in months from start of study treatment to first documentation of objective tumor progression or death due to any cause. PFS was calculated as (first event date minus the date of first dose of study medication plus 1) divided by 30.4. Tumor progression was determined from oncologic assessment data (where data meet the criteria for progressive disease \[PD\]), or from adverse event (AE) data (where the outcome was Death). PD was a\>=20% increase in sum of the longest dimensions of target lesions taking as a reference the smallest sum of the longest dimensions recorded since the treatment started, or the appearance of 1 or more new lesions.

Time frame: Baseline up to disease progression or withdrawal, assessed on Day 21 of every other cycle starting from Cycle 2 up to Day 784

Population: Efficacy analysis set included all enrolled participants who received at least 1 dose of study medication, had measurable disease at baseline (according to RECIST criteria version 1.0), and had at least 1 tumor assessment during study.

Tmax for axitinib in absence of chemotherapy (axitinib alone) was evaluated on Cycle 1 Day -1 and in combination with chemotherapy on Cycle 1 Day 1. Tmax for cisplatin (assessed by estimating total platinum in plasma ultrafiltrate), capecitabine and capecitabine's metabolites (5-FU, 5-DFUR and 5-DFC) in presence of steady-state axitinib were evaluated on Cycle 1 Day 1 and in absence of axitinib (cisplatin/capecitabine alone) on Cycle 2 Day 1.

Time frame: 0 (pre-dose), 1, 2, 3, 4, 6, 8 hrs post-axitinib dose on C1D-1, C1D1; 0 (pre-dose), 0.25, 0.5, 1, 2, 3, 4, 6, 8 hrs post-capecitabine dose C1D1, C2D1; 0 (pre-dose), 0.5, 1, 2, 3, 4, 6, 8 hrs post-cisplatin infusion start C1D1, C2D1

Population: Pharmacokinetic parameter analysis set included all treated participants who had at least 1 estimated pharmacokinetic parameter of primary interest. Here, 'n' signifies those participants who were evaluable for specified study drug's PK parameter alone or in combination.

Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Clearance for cisplatin (assessed by estimating total platinum in plasma ultrafiltrate) in presence of steady-state axitinib was evaluated on Cycle 1 Day 1 and in absence of axitinib (cisplatin alone) on Cycle 2 Day 1.

Time frame: 0 (pre-dose), 0.5, 1, 2, 3, 4, 6, 8 hrs post-cisplatin infusion start on C1D1, C2D1

Population: Pharmacokinetic parameter analysis set included all treated participants who had at least 1 estimated pharmacokinetic parameter of primary interest. Here, 'N' (number of participants analyzed) signifies those participants who were evaluable for this measure.

MTD = highest dose at which no more than 30 percent (%) of 12 participants experience DLT during Cycle 1. DLT = GR2 proteinuria; GR3 NHT (excluding alopecia and those that can be controlled with appropriate treatment)for \>=7 days, GR3 thrombocytopenia with active bleeding; GR \>=3 febrile NP/NP infection; GR 3 or 4 nausea, vomiting or diarrhea despite anti-emetics, anti-diarrheals; GR4 NHT, thrombocytopenia, NP for \>=7 days; \>= 1/2 teaspoon per day hemoptysis; any treatment-related toxicity with \>3 consecutive days of capecitabine or 5 consecutive days of axitinib missed doses per cycle; delayed toxicity recovery \>14 days.

Time frame: Baseline up to Day 21 of Cycle 1

Population: DLT analysis set: participants who received first cycle of study treatment and did not temporarily or permanently discontinue or miss more than 5 consecutive days of axitinib (AG-13736) or more than 3 consecutive days of capecitabine for reasons other than DLTs within first cycle.