Study Of Sunitinib With FOLFIRI In Colorectal Cancer

PFS is defined as the time from the date of enrollment to the date of the first documentation of objective tumor progression or death due to any cause, whichever occurs first.

PFS data was censored on the day following the date of the last tumor assessment documenting absence of progressive disease for patients who 1) were given anti-tumor treatment other than the study treatment prior to observing objective tumor progression; 2) were removed from the study prior to documentation of objective tumor progression; and 3) were ongoing at the time of the analysis.

OS is defined as the time from the date of enrollment to the date of death due to any cause. OS data was censored on the day following the date of the last contact at which the patient is known to be alive.

ORR is defined as the percentage of participants with best overall response of either a confirmed complete (CR) or partial response (PR) relative to the number of participants in FAS. Based on the response evaluation criteria in solid tumors (RECIST), CR is defined as the disappearance of all target lesions and PR is defined as a greater than or equal to 30% decrease in the sum of the longest dimensions of the target lesion.

DR is defined as the time from the first objective documentation of complete or partial response that is subsequently confirmed to the first documentation of disease progression or to death due to any cause, whichever occurs first. The definition of censorship is the same as PFS.

Plasma concentrations were assessed at predose, 2, 4, 6, 8, and 24 hours postdose and Cmax and Ctrough of sunitinib, its metabolite SU012662, and the total (sunitinib + SU0122662) were determined.

AUC 0-24 was determined using the Linear/Log trapezoidal method.

Clearance 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. Clearance was estimated from population pharmacokinetic (PK) modeling. Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood.

Plasma samples were assessed at prior to initiation of irinotecan (and l-leucovorin) infusion, 1, 2 (predose for 5-FU bolus), 4, 8, and 24 hours after initiation of irinotecan infusion, and Cmax of irinotecan and its metabolite SN-38 were determined.

AUC last of irinotecan and its metabolite SN-38 were calculated using the Linear/Log trapezoidal method.

AUC∞ of irinotecan was calculated using following equation; AUC last+(C*t/kel), where Ct* is the estimated concentration at the time of the last quantifiable concentration, kel is terminal phase rate constant that is estimated as the absolute value of the slope of a linear regression during the terminal phase of the natural-logarithm (ln) transformed concentration-time profile.

Terminal phase half-life of irinotecan was calculated as ln 2/ kel.

CL is calculated as dose divided by AUC 0-∞

Vss was calculated using following equation: CL x mean residence time (MRT), where MRT = the area under the first moment curve from zero time to infinity (AUMC 0-∞)/AUC 0-∞- (infusion time/2), AUMC 0-∞ = the area under the first moment curve from zero time to time t (AUMC t)+ ((t x Ct*)/ kel) + (Ct* / kel^2), AUMC t is calculated using the linear trapezoidal method.

Concentration at 22 hour post start of 5-FU infusion were to be used as Css if 5-FU concentrations suggested steady state at 22 hours time point.

Any untoward medical occurrence in a patient who received study drug was considered an adverse event (AE), without regard to possibility of causal relationship. Treatment-emergent adverse events (TEAE): those which occurred or worsened after baseline. An adverse event resulting in any of the following outcomes, or deemed to be significant for any other reason, was considered to be a serious adverse event (SAE): death; initial or prolonged inpatient hospitalization; a life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly.