RGD Reference Report - Prognostic significance of Hypoxia-Inducible Factor 1 alpha(HIF-1 alpha) expression in serous ovarian cancer: an immunohistochemical study. - Rat Genome Database

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Prognostic significance of Hypoxia-Inducible Factor 1 alpha(HIF-1 alpha) expression in serous ovarian cancer: an immunohistochemical study.

Authors: Daponte, A  Ioannou, M  Mylonis, I  Simos, G  Minas, M  Messinis, IE  Koukoulis, G 
Citation: Daponte A, etal., BMC Cancer. 2008 Nov 16;8:335.
RGD ID: 2306225
Pubmed: PMID:19014607   (View Abstract at PubMed)
PMCID: PMC2651893   (View Article at PubMed Central)
DOI: DOI:10.1186/1471-2407-8-335   (Journal Full-text)

BACKGROUND: The hypoxia-inducible factor (HIF) has emerged as an attractive target for cancer therapy. The few publications addressing the prognostic significance of Hypoxia-Inducible Factor 1 alpha (HIF-1 alpha) cellular expression in ovarian cancer produced contradictory findings which are not permissible to widely acceptable conclusions and clinical applications. Our study was designed to investigate this by including a comparatively large number of cases and by using a combination of antibodies to analyze immunohistochemically the expression of HIF-1 alpha. METHODS: One hundred (n = 100) neoplastic and 20 benign (controls) pathological samples from paraffin-embedded tissue were included. They were classified after surgery as stage I (n = 23) and stage III G3 (n = 55). Also 22 borderline serous adenocarcinoma patients and 20 benign controls were stained. The mean follow up was 3 years. Only patients with the diagnosis of serous carcinoma of stage III, G3 who received 6 cycles of postoperative TC (175-180 mg/m2 paclitaxel and carboplatin after calculating the area under the concentration curve) with complete medical records (n = 55) were selected for survival analysis. The survival analysis of the samples compared two groups after the patients were dichotomized by HIF-1 alpha final score to positive and negative. RESULTS: The frequency of the nuclear expression of HIF-1 alpha in benign tumours was significantly lower (median: no expression) than in borderline and ovarian cancer tumours combined (p < 0.001). HIF-1 alpha expression in serous ovarian carcinoma was not stage dependent. The overall survival of patients with tumours that stained strongly for HIF-1 alpha was significantly shorter than that of patients with tumours that stained weakly or were negative for HIF-1 alpha (p = 0.01). Kaplan-Meier survival curves confirmed that HIF-1 alpha "positive" had decreased overall survival compared to HIF-1 alpha "negative" patients (p = 0.003) and this was an independent adverse prognostic factor (multivariable analysis p = 0.006). HIF-1 alpha "positive" patients displayed a shorter median progress free interval (PFI) (not statistically significant p > 0.05). Interestingly the overall PFI of the subgroup of patients that have undergone suboptimal cytoreduction at primary surgery (n = 21) with tumours that stained strongly for HIF-1 alpha was significantly worse than that of patients with tumours that stained weakly or were negative for HIF- 1 alpha (p = 0.03). CONCLUSION: Our report confirms the prognostic value of HIF-1 alpha when restricted to poorly differentiated serous ovarian carcinoma. In addition it shows that this association is elusive, since it is not only methodology-related but it can be antibody-depended. There is adequate evidence to speculate that targeting HIF-1 alpha could improve the long-term prognosis of these patients In order to increase the overall sensitivity of the immunoassay, maintaining acceptable levels of specificity, a panel of antibodies should be used.



RGD Manual Disease Annotations    Click to see Annotation Detail View
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
HIF1AHumanovarian cancer disease_progressionIEP  RGD 
Hif1aRatovarian cancer disease_progressionISOHIF1A (Homo sapiens) RGD 
Hif1aMouseovarian cancer disease_progressionISOHIF1A (Homo sapiens) RGD 

Objects Annotated

Genes (Rattus norvegicus)
Hif1a  (hypoxia inducible factor 1 subunit alpha)

Genes (Mus musculus)
Hif1a  (hypoxia inducible factor 1, alpha subunit)

Genes (Homo sapiens)
HIF1A  (hypoxia inducible factor 1 subunit alpha)


Additional Information