Biomarkers in Tissue Samples From Patients With Ewing Sarcoma

This study has been completed.
National Cancer Institute (NCI)
Information provided by (Responsible Party):
Children's Oncology Group Identifier:
First received: November 22, 2011
Last updated: May 8, 2015
Last verified: May 2015

RATIONALE: Studying samples of tissue in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. It may also help doctors understand how well patients respond to treatment.

PURPOSE: This research study is studying biomarkers in tissue samples from patients with Ewing sarcoma.

Condition Intervention
Genetic: DNA analysis
Genetic: comparative genomic hybridization
Genetic: gene expression analysis
Genetic: mutation analysis
Genetic: polymerase chain reaction
Genetic: polymorphic microsatellite marker analysis
Other: laboratory biomarker analysis

Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Retrospective
Official Title: Analysis of GGAA-Microsatellites in Ewing Sarcoma

Resource links provided by NLM:

Further study details as provided by Children's Oncology Group:

Primary Outcome Measures:
  • Event-free survival [ Designated as safety issue: No ]

Biospecimen Retention:   Samples With DNA

Enrollment: 166
Study Start Date: December 2011
Study Completion Date: January 2012
Primary Completion Date: January 2012 (Final data collection date for primary outcome measure)
Detailed Description:


  • To describe the spectrum of GGAA-microsatellite polymorphisms at specific loci in genomic DNA prepared from Ewing sarcoma tumor specimens.
  • To determine if there are differences in GGAA-microsatellite polymorphisms in genomic DNA prepared from Ewing sarcoma tumor specimens as compared to non-afflicted European and African normal genomic DNA.
  • To determine if GGAA-microsatellite polymorphisms at specific loci in genomic DNA prepared from Ewing's sarcoma tumor specimens correlates with disease outcome in patients treated on COG protocol AEWS0031.
  • To determine whether whole-genome amplification introduces alterations in GGAA-microsatellites as compared to non-amplified genomic DNA.

OUTLINE: Genomic PCR is used to amplify the microsatellites in the NR0B1 and GSTM4 promoters. In addition to determining microsatellite size, each microsatellite is sequenced following cloning into the pCR4 vector (Invitrogen) using standard topoisomerase cloning protocols.


Ages Eligible for Study:   up to 50 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Ewing sarcoma.


  • Specimens from patients with Ewing sarcoma used for protocol COG-AEWS08B1

    • Obtained from patient samples taken from patients enrolled on COG-AEWS0031
    • Whole genome-amplified DNA will be used


  • Not specified


  • Not specified
  Contacts and Locations
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Please refer to this study by its identifier: NCT01480518

Sponsors and Collaborators
Children's Oncology Group
National Cancer Institute (NCI)
Principal Investigator: Stephen Lessnick, MD, PhD University of Utah
  More Information

Responsible Party: Children's Oncology Group Identifier: NCT01480518     History of Changes
Other Study ID Numbers: AEWS11B2  COG-AEWS11B2  AEWS11B2  NCI-2012-00083 
Study First Received: November 22, 2011
Last Updated: May 8, 2015
Health Authority: United States: Federal Government

Keywords provided by Children's Oncology Group:
localized Ewing sarcoma/peripheral primitive neuroectodermal tumor

Additional relevant MeSH terms:
Sarcoma, Ewing
Neoplasms by Histologic Type
Neoplasms, Bone Tissue
Neoplasms, Connective Tissue
Neoplasms, Connective and Soft Tissue
Osteosarcoma processed this record on May 26, 2016