Study Evaluating SKI-606 (Bosutinib) In Advanced Malignant Solid Tumors

DLT included any grade 3 or 4 clinically-evident non-hematologic toxicity, grade 4 neutropenia of greater than or equal to (>=) 7-day duration or with fever >= 38.5 degrees Celsius (febrile neutropenia); grade 4 thrombocytopenia >= 2-day duration or with bleeding requiring platelet transfusion, any clinically-significant grade >= 2 toxicity that requires >=14 days to resolve (to less than or equal to [=<] grade 1) which occurred in first 21 days of study and considered at least possibly related to bosutinib.

Counts of participants who had treatment-emergent adverse events (TEAEs), defined as newly occurring or worsening after first dose. Participants with multiple occurrences of an AE within a category were counted once within the category.

The most frequently observed treatment-emergent AEs were gastrointestinal disorders which included diarrhea, nausea and vomiting. Duration of AE per event is calculated as AE stop date minus AE start date plus 1.

BOR:investigator assessment by modified Response Evaluation Criteria in Solid Tumors (RECIST), recorded from treatment start until disease progression/recurrence. Complete Response:disappearance of all lesions. Partial Response (PR):>=30% decrease in sum of longest diameters (SLDs) of target lesions (TLs) taking as reference baseline SLD. Progressive disease (PD):>=20% increase in SLD of TLs taking as reference smallest SLD since treatment start, or appearance of >=1 new lesion. Stable disease: neither shrinkage for PR nor increase for PD taking as reference smallest SLD since treatment start.

BOR: investigator assessment by modified RECIST, recorded from treatment start until disease progression/recurrence. Complete Response: disappearance of all lesions. PR: >=30% decrease in SLDs of TLs taking as reference baseline SLD. PD: >=20% increase in SLD of TLs taking as reference smallest SLD since treatment start, or appearance of >=1 new lesion. Stable disease: neither shrinkage for PR nor increase for PD taking as reference smallest SLD since treatment start.

MTD: highest dose level at which not more than 1 of 6 participants experienced DLT after 21 days of treatment (Cycle 1). DLT included any grade 3 or 4 clinically-evident non-hematologic toxicity, grade 4 neutropenia of >= 7-day duration or with fever >= 38.5 degrees Celsius (febrile neutropenia); grade 4 thrombocytopenia >= 2-day duration or with bleeding requiring platelet transfusion, any clinically-significant grade >= 2 toxicity that requires >=14 days to resolve (to =< grade 1) which occurred in first 21 days of study and considered at least possibly related to bosutinib.

MTD for prolonged use was the highest dose level at which not more than 1 of 6 participants experienced DLT after 21 days of treatment (Cycle 1) and was selected as recommended dose in Phase 2, due to substantial number of Grade 2 gastrointestinal toxicities observed in the MTD lead-in cohort (500 mg).

Criteria for potentially clinically significant (PCS) laboratory values: albumin <20, hemoglobin <80 gram/liter(g/L); alkaline phosphatase, aspartate aminotransferase, alanine aminotransferase >5*upper limit of normal(ULN) milliunit/milliliter(mU/mL); bilirubin total, creatinine>3*ULN micromole/L; calcium <1.75 and >3.1,potassium <3 and >6, sodium <130, glucose <2.2,phosphorous <0.6 millimole/L; international normalized ratio >2*ULN, partial thromboplastin time, prothrombin time >2*ULN seconds; platelet count <50*10^9/L. Participants meeting at least 1 PCS criteria are reported.

Number of participants with PCS ECG findings is reported on-therapy (OT) and at final visit (FV). Criteria for PCS ECG findings: heart rate (HR) =<45 beats/minute (bpm) and decrease (Dec) >15/>=120 bpm and decrease of >15 bpm; PR interval (Int) >=220 millisecond (msec), increase (Inc) >=20 msec, QRS Int >=120 msec, corrected QT (QTc) and QTc using fridericia formula(QTcF) Int >500 msec, increase >60 msec; no sinus rhythm; overall ECG abnormal. Participants with at least 1 measurement exceeding the criteria for PCS are reported.

Number of participants taking any non-study medications which were administered from Day 1 up to end of treatment (Week 95) as a management of an AE was to be reported.

Karnofsky performance score is used to quantify participant's general well-being and activities of daily life and participants are classified based on their functional impairment. Karnofsky performance score is 11 level score which ranges between 0 (death) to 100 (complete healthy status). Higher score means higher ability to perform daily tasks.

Physical examinations included body weight, height and vital signs and only finding that exceeded the criterion for PCS was weight. Criteria for weight was: an increase or decrease of >=10% from baseline.

Ophthalmologic evaluation included visual acuity, funduscopic examination, and any clinically-significant abnormality.

Time in weeks from the start of study treatment to date of death due to any cause. OS was calculated as (the death date minus the date of first dose of study medication plus 1) divided by 7. Death was determined from death case report forms (CRFs) or from follow-up contact data (where the participant current status was death).

Time in weeks 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 7. Tumor progression was determined from oncologic assessment data (where data meet the criteria for PD, or from death CRFs).

Plasma decay half-life is the time measured for the plasma concentration to decrease by one half.

AUC is a measure of the serum concentration of the drug over time. It is used to characterize drug absorption. Steady state concentration was achieved at Day 15.

Gene expression profile was evaluated by measuring transcript levels of messenger RNA (mRNA) in peripheral blood samples. Expression profiling of mRNA: done to measure the expressed genome of mRNA transcripts or done in a gene-specific targeted manner.