Cyclooxygenase-2 (COX-2) expression by immunohistochemistry in glioblastoma multiforme.
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| Abstract |
Cyclooxygenase-2 (COX-2) (an enzyme responsible for the conversion of arachidonic acid to prostaglandin) upregulation has been described in association with a variety of tumors including gliomas. This study reviews the immunohistochemical profile of 47 glioblastoma multiforme using COX-2 antibody and correlates the results with MIB-1 (marker of cell proliferation) immunostaining. Positive staining with COX-2 was observed in 35 tumors (74.5%); more than 10% tumor cell positivity was seen in 10 tumors (21.3%). Immunostaining results were as follows: no staining, N = 12 (25.5%); 0% to 5% of tumor cells, N = 20 (42.6%); 5% to 10%, N = 5 (10.6%); 10% to 20%, N = 4 (8.5%); 20% to 50%, N = 4 (8.5%); and greater than 50%, N = 2 (4.3%). The mean MIB-1 labeling index for all tumors ranged from 3.0 to 76.4 (mean, 19.6). Mean MIB-1 labeling indices were higher in tumors with greater than 5% COX-2 immunostaining (mean MIB-1 labeling index, 23.5) versus tumors with 0% to 5% COX-2 immunostaining (mean MIB-1 labeling index, 17.7). There is evidence of COX-2 expression by immunohistochemistry in the majority of glioblastoma multiforme. As a group, tumors with a higher rate of cell proliferation tended to have increased expression of COX-2. These findings are significant in that therapeutic agents, which inhibit COX-2, are currently available and may play a role in the management of glioblastoma multiforme.
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| Authors | Richard A Prayson, Elias A Castilla, Michael A Vogelbaum, Gene H Barnett |
| Journal | Annals of diagnostic pathology (Ann Diagn Pathol) Vol. 6 Issue 3 Pg. 148-53 (Jun 2002) ISSN: 1092-9134 [Print] United States |
| PMID | 12089724 (Publication Type: Journal Article) |
| Copyright | Copyright 2002, Elsevier Science (USA). All rights reserved. |
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