Kinase Genotyping of Gastro Intestinal Stomach Tumors (GISTs) From Patients Enrolled in Pfizer A6181112 Phase IIIb Trial


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Eligibility Criteria
The disease, disorder, syndrome, illness, or injury that is being studied.
Gastrointestinal Neoplasm
Females and Males
Pediatric Trials: 0-17 Years
Adult Trials: 18+ Years
18-80 years
Inclusion Criteria
The factors, or reasons, that allow a person to participate in a clinical study.
Show details

- Patients enrolled in Pfizer A6181112

Exclusion Criteria
The factors, or reasons, that prevent a person from participating in a clinical study.
Show details

- Patients who do not consent for analysis of their tumor in this companion study


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Advanced Information
Descriptive Information
Brief Title Kinase Genotyping of Gastro Intestinal Stomach Tumors (GISTs) From Patients Enrolled in Pfizer A6181112 Phase IIIb Trial
Official Title Kinase Genotyping of Gastrointestinal Stromal Tumors (GIST) From Patients Enrolled in the A6181112 Phase IIIb Trial at Participating U.S. and Ex-U.S. Medical Centers
Brief Summary The purpose of this study is to determine the genetic makeup of gastro intestinal stomach tumors (GISTs) from patients enrolled in the A6181112 phase IIIb trial. Tumor samples will be screened for mutations and this information will be used to determine whether the progression-free survival of patients being treated with the cancer medication sunitinib is related to the underlying genotype of their GIST.
Detailed Description In this companion study, we will analyze the genomic DNA from the GIST tumor specimens of patients enrolled in the in the A6181112 phase IIIb trial at participating U.S. and ex-U.S. medical centers. Specifically, GIST samples will be screened for mutations in KIT gene exons 9, 11, 13 and 17, and PDGFRA gene exons 12, 14 and 18, to determine the primary kinase genotype. Subset analyses will be performed and compared with the overall PFS rates observed in patients with primary and secondary imatinib resistance. Based on data from a previous phase I/II trial, our hypothesis is that patients with either primary or secondary imatinib resistance having a KIT exon 9-mutant or WT GIST will have a longer PFS when treated with sunitinib than patients with exon 11-mutant GIST. We further hypothesize that this difference will be observed among patients treated with high-dose imatinib.
Study Type Observational
Study Design Observational Model: Case-Control
Time Perspective: Prospective
Target Follow-Up Duration Not Provided
Biospecimen Retention:   Samples With DNA
Genomic DNA from tumor samples
Sampling Method Non-Probability Sample
Study Population Patients enrolled in Pfizer A6181112
Condition Gastrointestinal Neoplasm
Intervention Not Provided
Study Groups/Cohorts
  • 1
  • 2
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status Withdrawn
Actual Enrollment
 (submitted: October 31, 2019)
Original Estimated Enrollment
 (submitted: March 20, 2008)
Estimated Study Completion Date April 2011
Estimated Primary Completion Date September 2009   (Final data collection date for primary outcome measure)
Eligibility Criteria

Inclusion Criteria:

  • Patients enrolled in Pfizer A6181112

Exclusion Criteria:

  • Patients who do not consent for analysis of their tumor in this companion study
Sexes Eligible for Study:All
Ages 18 Years to 80 Years   (Adult, Older Adult)
Accepts Healthy Volunteers No
Contacts Contact information is only displayed when the study is recruiting subjects
Listed Location Countries Not Provided
Removed Location Countries United States
Administrative Information
NCT Number NCT00640692
Other Study ID Numbers Pfizer GIST Genotyping Study
Has Data Monitoring Committee No
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement Not Provided
Responsible Party Oregon Health and Science University
Study Sponsor Oregon Health and Science University
Collaborators Pfizer
Principal Investigator:Christopher L Corless, MD, PhDOregon Health and Science University
PRS Account Oregon Health and Science University
Verification Date October 2019