About this trial
The purpose of this research is to test if mutations (changes in DNA) in exons (segment of DNA or RNA containing information that has the instructions for making proteins) in the KIT gene can be used to predict the body's response to standard of care treatment.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Patients who are ≥ 18 years of age.
Patients who have histologically confirmed metastatic or unresectable GIST. Unresectable GIST must be confirmed to be unresectable by an experienced surgeon.
Patients who received imatinib prior treatment regimens, including adjuvant therapy, with objective disease progression, inadequate clinical benefit, or intolerance. Additionally, disease progression or intolerance to other systemic therapies including investigational agents and radiotherapy is allowed. Patients who experienced intolerance to prior therapies must have objective disease progression prior to enrollment.
Patients who have an Eastern Cooperative Oncology Group Performance Status (ECOG PS) of 0 to 2.
Disqualifiers
Patients who have received prior treatment with sunitinib or regorafenib.
Patients who have received more than 2 different prior tyrosine kinase inhibitor (TKI) treatment regimens. If a patient receives the same TKI more than once sequentially (eg, imatinib followed by a period without systemic therapy and retreatment with imatinib), that will be counted as a single TKI treatment regimen.
Patients who are known to be KIT wild type.
Patients who received any systemic anticancer therapy within 2 weeks before. Prior radiotherapy to major organs within 2 weeks of admission, or focal radiotherapy, such as to bones, limbs, or other areas not involving major organs, within 3 days.
Trial design
Parallel
Treatments tested in this trial
Sunitinib
Drug37.5 mg of Sunitinib orally (PO), once daily on a 28-day treatment cycle.
Regorafenib
Drug120.0 mg of Regorafenib, once daily by mouth 3 weeks on 1 week off on a 4-week treatment cycle.
Treatment groups
Trial outcomes
Primary outcomes
Number of Participants Achieving Overall Response
The overall response rate (ORR) will be defined as the number of evaluable patients whose best overall response to study treatment is complete response (CR) or partial response (PR). ORR will be assessed using Choi criteria by treating physician.
Secondary outcomes
Progression-Free Survival (PFS)
Progression-free survival (PFS) will be defined as the time elapsed from the start of treatment to the date of documented progression or death, whichever comes first. For surviving patients without progression who begin alternative treatment, PFS will be censored at the last date of documented progression-free status prior to starting alternative treatment. Similarly, losses to follow up will be censored at the last date of documented progression-free status.
Overall Survival (OS)
Overall survival (OS) will be defined as the time elapsed from the start of treatment until death. For surviving patients, follow-up will be censored at the date of last contact.
Number of Participants Achieving Clinical Benefit
The clinical benefit rate (CBR) will be defined as the number of evaluable patients whose best overall response to study treatment is complete response (CR), or partial response (PR), or stable disease (SD), for 6 months or more and will be assessed using Choi criteria by treating physician.
Incidence of Treatment-Related Toxicity and Adverse Events
Safety and tolerability of assigned Sunitinib and Regorafenib treatment will be reported as the incidence of treatment-related toxicity, including serious adverse events (SAEs) and adverse events (AEs), in study participants using the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 5.0, per physician discretion.
Sponsors and contacts
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