Study of Tissue and Blood Samples From Patients With Low-Grade Glioma



Status:Recruiting
Conditions:Brain Cancer
Therapuetic Areas:Oncology
Healthy:No
Age Range:Any
Updated:7/16/2013

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Diagnostic and Prognostic Markers in Low-Grade Gliomas


RATIONALE: Studying samples of tumor tissue and blood from patients with cancer 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 predict how patients will respond to
treatment.

PURPOSE: This research study is looking at tissue and blood samples from patients with
low-grade glioma.


OBJECTIVES:

- Evaluate the diagnostic and prognostic relevance of alterations of specific chromosomes
and chromosomal regions including 7, 9p, 10p, 10q, 13q, 17p, 17q, 19q, 22q, X, and Y,
using PCR analysis of microsatellite repeats and FISH.

- Evaluate the diagnostic and prognostic relevance of DNA ploidy by flow cytometric
analysis; compare with ploidy determination by FISH.

- Assess the diagnostic and prognostic relevance of various markers of cellular
proliferation and cellular function including flow cytometric determination of
%S-phase, %G2M, and immunohistochemical evaluation of PCNA, Ki-67, and p53.

OUTLINE: Previously preserved paraffin-embedded tissue blocks are obtained and used for
biomarker studies. Blood samples obtained during treatment are also obtained. Loss of
heterozygosity of specific chromosomal regions are performed using PCR analysis of
microsatellite repeats (41,118-120) on DNA extracted from the paraffin-embedded archival
specimens. FISH and flow cytometry may also be used to assess chromosomal loss of deletion.
Immunohistochemistry is also performed.

DISEASE CHARACTERISTICS:

- Diagnosis of low-grade glioma, meeting 1 of the following criteria:

- Paraffin embedded tumor tissue blocks obtained while enrolled in prospective
NCCTG and Mayo studies available

- Paraffin-embedded tumor tissue blocks obtained while enrolled in NCCTG 86-72-51
or NCCTG 93-72-02 available

PATIENT CHARACTERISTICS:

- Not specified

PRIOR CONCURRENT THERAPY:

- See Disease Characteristics
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