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Clin Cancer Res. 2001 Jun;7(6):1661-8.

Expression of hypoxia-inducible factor 1alpha in epithelial ovarian tumors: its impact on prognosis and on response to chemotherapy.

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  • 1Institute of Clinical Pathology, University of Vienna, A-1090 Vienna, Austria. peter.birner@akh-wien.ac.at

Abstract

PURPOSE:

To investigate the impact of expression of hypoxia-inducible factor (HIF)-1alpha on prognosis and on response to chemotherapy in epithelial ovarian tumors.

EXPERIMENTAL DESIGN:

Expression of HIF-1alpha protein was studied by immunohistochemistry in 102 specimens of epithelial ovarian cancers, in 50 borderline tumors, and in 20 cystadenomas. Results were correlated with p53, p21, and bcl-2 expression, microvessel density (MVD), apoptotic rate of tumor cells, and survival.

RESULTS:

In 68.6% of ovarian cancers and 88% of borderline tumors, expression of HIF-1alpha was observed. There was a significant correlation of HIF-1alpha protein expression and MVD (P < 0.001). HIF-1alpha overexpression alone and MVD showed no impact on survival of cancer patients. Furthermore, the response to platinum-based chemotherapy was independent from HIF-1alpha expression. Expression of HIF-1alpha correlated with apoptotic rate in the majority of cases, especially in low malignant potential tumors. In contrast, in cancer patients with strong expression of HIF-1alpha and p53 protein overexpression, not only a significantly increased MVD (P = 0.032, Mann-Whitney test) but also a significantly shorter overall survival was observed (P < 0.0001, Cox regression). The apoptotic rate was very low in these tumors.

CONCLUSIONS:

HIF-1alpha protein overexpression alone has no impact on the prognosis of ovarian cancer. The combination of HIF-1alpha protein overexpression with nonfunctional p53, however, indicates a dismal prognosis.

PMID:
11410504
[PubMed - indexed for MEDLINE]
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