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Cyclooxygenase-2 in oligodendroglial neoplasms
Elias A Castilla1, Richard A Prayson, Andrew A Kanner
1Department of Anatomic Pathology, Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
Cancer
|September 26, 2003
Summary
Cyclooxygenase-2 (COX-2) expression and chromosome 1p loss in oligodendrogliomas correlate with patient survival. High COX-2 expression and lack of 1p loss are linked to poorer outcomes, suggesting potential therapeutic targets.
Area of Science:
- Neuro-oncology
- Molecular pathology
- Cancer research
Background:
- Cyclooxygenase-2 (COX-2) is implicated in various cancers, but its role in oligodendrogliomas is understudied.
- Limited data exists on COX-2 expression in oligodendrogliomas.
Purpose of the Study:
- To investigate the expression of COX-2 in oligodendrogliomas.
- To correlate COX-2 expression with MIB-1 proliferative index and chromosome 1p status.
- To assess the prognostic significance of these factors in oligodendrogliomas.
Main Methods:
- Retrospective analysis of 53 oligodendrogliomas and 7 oligoastrocytomas.
- Immunohistochemistry for COX-2 and MIB-1 (proliferation marker).
- Fluorescence in situ hybridization for chromosome 1p status.
Main Results:
- COX-2 expression was observed in 17 tumor specimens.
- Lack of chromosome 1p allelic loss and high MIB-1 labeling indices were noted.
- COX-2 expression, lack of 1p allelic loss, and high proliferation were associated with decreased survival (P=0.002, P=0.009, P=0.015, respectively).
Conclusions:
- Chromosome 1p status, COX-2 immunoreactivity, and MIB-1 labeling indices are significant prognostic factors in oligodendrogliomas.
- These factors correlate with decreased patient survival.
- Tumors expressing COX-2 may respond to COX-2 inhibitor therapies.