A Study Evaluating STA-9090 in Patients With Metastatic and/or Unresectable Gastrointestinal Stromal Tumor (GIST)

Experimental: ganetespib 200 mg/m^2

Ganetespib (STA-9090) 200 mg/m^2 intravenous infusion once weekly for 3 consecutive weeks followed by one week dose free interval (3 weeks on and 1 week off represent a treatment cycle). Treatment continues until disease progression or unacceptable toxicity.

Medicamento: Ganetespib

Ganetespib 200 mg/m^2 during an approximately 1-hour infusion once weekly for three consecutive weeks followed by a treatment-free week. Participants who demonstrate acceptable tolerability and objective clinical benefit (defined by at least stable disease or objective response per RECIST) can continue to receive ganetespib until disease progression or appearance of unacceptable toxicity.

Outros nomes:

• STA-9090

Percentage of Participants Showing Clinical Benefit Based on Response Evaluation Criteria in Solid Tumors (RECIST) Version 1.0

Clinical benefit is defined as showing a complete response (CR), a partial response (PR) or stable disease (SD) for at least 16 weeks.

• CR: disappearance of all target lesions and non-target lesions and no new lesions
• PR: at least a 30% decrease in the sum of the longest diameter of target lesions, no disease progression for non-target lesions, and no new lesions
• SD: neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease, no disease progression for non-target lesions, and no new lesions

Percentage of Participants Showing an Objective Response Based on RECIST Version 1.0

Objective response included participants whose best response with confirmation was a complete response (CR) or partial response (PR) from first dose until progression or end of study.

• CR: disappearance of all target lesions and non-target lesions and no new lesions
• PR: at least a 30% decrease in the sum of the longest diameter of target lesions, no disease progression for non-target lesions, and no new lesions

Kaplan-Meier Estimate of Progression Free Survival (PFS)

PFS was defined as the time from the baseline CT scan to disease progression per RECIST or death for any cause. Progressive disease (PD) was defined as

• at least a 20% increase in the sum of the longest diameter of target lesions, taking as reference the smallest sum longest diameter recorded since the treatment started or
• the appearance of 1 or more new lesions or
• the unequivocal progression of existing nontarget lesions

Kaplan-Meier Estimate of Overall Survival

Overall survival was defined as the time from first dose to death or the date last known alive.

Percentage of Participants Showing a Tumor Response During Cycle 1 in Selected Participants Measured by Positron Emission Tomography (PET)

PET imaging was completed on selected patients only from one investigative site. Treatment phase PET and biopsy was completed on any day from Cycle 1 Day 2 through Day 10. PET imaging data were analyzed utilizing the European Organization for Research and Treatment of Cancer (EORTC) PET Study Group guidelines [Young H, Eur J Cancer, 1999]. Tumor response was considered a complete response (CR) or a partial response (PR).

Count of Participants With Treatment-Emergent Adverse Events (AEs)

Treatment-emergent AEs were defined as AEs that occurred from the time of first dose through 30 days after the last dose of study medication. The Investigator graded the severity of AEs according to National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) criteria:

Grade 1 = Mild Grade 2 = Moderate Grade 3 = Severe Grade 4 = Life threatening Grade 5 = Death

A Serious AE is defined as any AE which results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect or constitutes an important medical event.

Dose modification includes dose delay and dose reduction.