Brain and Central Nervous System Tumors Clinical Trial
Official title:
Diagnostic And Prognostic Markers In High-Grade Glioma
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
high-grade glioma.
OBJECTIVES:
- To evaluate the diagnostic and prognostic relevance of various molecular, cytogenetic,
and other tumor markers in high-grade glioma in paraffin-embedded tissue collected from
patients enrolled in the Mayo Clinic or North Central Cancer Treatment Group (NCCTG)
high-grade glioma trials conducted since 1979.
- To evaluate 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.
- To determine DNA ploidy by flow cytometric analysis.
- To examine 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.
- To evaluate additional markers identified by the Glioma Markers Network.
- To compare the incidence of markers in the major histologic subtypes (anaplastic
astrocytoma [AA], anaplastic oligoastrocytoma [AOA], glioblastoma multiforme [GBM]) and
to assess their correlation in the total group, as well as within each of these
subtypes.
- To compare the ploidy determinations by FISH and flow cytometry.
OUTLINE: Paraffin-embedded tissue and peripheral blood samples, previously or currently
collected from clinical trials participants at the time she/he enrolled in the trial, are
evaluated for as many markers as possible, changes in cytogenic and molecular genetic tumor
markers, frequency distributions of all tumor markers and histological and clinical variables
by polymerase chain reaction, IHC, flow cytometry, and FISH analysis.
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