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A Retrospective Study of C-kit Mutation Status in Asian Patients With Advanced Gastro-intestinal Stromal Tumors (GIST) Treated With Imatinib.

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified January 2014 by National University Hospital, Singapore.
Recruitment status was:  Recruiting
Information provided by:
National University Hospital, Singapore Identifier:
First received: October 21, 2010
Last updated: January 21, 2014
Last verified: January 2014
Imatinib is the current standard treatment for advanced GIST. Previous studies have shown that GIST genotype was associated with treatment outcomes with exon 11 having superior outcome compared with exon 9 or WT.10, 11 In patients with exon 9 kit mutation, the response rate was higher at when imatinib was given at 800mg daily compared with the standard dose of 400mg daily. Although the data linking tyrosine kinase mutation status and imatinib response in metastatic GISTs is intriguing, more information is needed before mutation testing is adopted as part of the routine analysis of high-risk or overtly malignant KIT-expressing GISTs.25 Despite the fact that exon 9 mutations are associated with a lower response rate, overall survival does not appear to be better with high-dose therapy. The investigators propose to conduct a retrospective analysis of mutational analysis on patients with GIST and determine the relationship between patient response and imatinib dose.

Condition Intervention
Asian Patients With Advanced Gastro-intestinal Stromal Tumors (GIST) Treated With Imatinib Procedure: Tumor biopsies

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Retrospective

Resource links provided by NLM:

Further study details as provided by National University Hospital, Singapore:

Study Start Date: September 2011
Estimated Study Completion Date: December 2014
Estimated Primary Completion Date: December 2014 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Tumor biopsies Procedure: Tumor biopsies


Ages Eligible for Study:   21 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Asian patients with advanced gastro-intestinal stromal tumors (GIST) treated with imatinib.

Inclusion Criteria:

  1. Histologic diagnosis of advanced stage or metastatic GIST
  2. Asian patient (as defined by the investigator)
  3. First line treatment with imatinib
  4. Availability of tumor samples for kit mutation analysis
  5. Availability of tumor response rate and or time to progression data

Exclusion Criteria:

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01227746

Contact: Ross Andrew Soo, MBBS 65 6772 4624

National University Hospital Recruiting
Singapore, Singapore
Contact: Ross Andrew Soo , MBBS    65 6772 4624   
Principal Investigator: Ross Andrew Soo, MBBS         
Sponsors and Collaborators
National University Hospital, Singapore
  More Information

Publications: Identifier: NCT01227746     History of Changes
Other Study ID Numbers: GA03/17/10
Study First Received: October 21, 2010
Last Updated: January 21, 2014

Keywords provided by National University Hospital, Singapore:
Advanced gastro-intestinal stromal tumors

Additional relevant MeSH terms:
Gastrointestinal Stromal Tumors
Neoplasms, Connective Tissue
Neoplasms, Connective and Soft Tissue
Neoplasms by Histologic Type
Gastrointestinal Neoplasms
Digestive System Neoplasms
Digestive System Diseases
Gastrointestinal Diseases processed this record on August 18, 2017