Abstract | INTRODUCTION: METHODS: 62 TNBC, 64 HER2+, and 64 hormone-receptors positive breast cancer cases were evaluated for central fibrosis and necrosis, HIF-1α, HIF-1β, VEGFR3, CD31 expression and microvessel density. RNA extraction from paraffin-embedded samples, followed by quantitative real-time polymerase chain reaction (qRT-PCR) evaluation of HIF-1α and VEGF transcripts was performed on 54 cases (18 from each subtype). RESULTS: HIF-1α protein was expressed in 35.5% TNBC, 45.3% HER2+and 25.0% ER+/PR+ (p = 0.055; χ2 test). PCRanalysis of subgroup of breast cancers, 84.2% expressed HIF-1α protein and its transcripts, while only 66.7% expressed VEGF transcripts simultaneously with the HIF-1α protein and its transcripts. Central fibrosis and necrosis was highest in TNBC (p = 0.015; χ2 test), while MVD was comparable among all groups (p = 0.928; χ2 test). VEGFR3 was highest in TNBC expressing HIF-1α. HIF-1β protein was expressed in 32.0% of HIF-1α(+), and in (44.3%) of HIF-1α(-) breast cancer cases (p = 0.033; χ2 test). Moreover, HIF-1α expression in cases with central fibrosis and necrosis was highest in the HER2+ followed by the TNBC (p = 0.156; χ2 test). CONCLUSIONS: A proportion of TNBC express HIF-1α but not in a significantly different manner from other breast cancer subtypes. The potential of anti-HIF-1α targeted therapy is therefore not a candidate for exclusive use in TNBC, but should be considered in all breast cancers, especially in the setting of clinically aggressive or refractory disease.
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Authors | Lamis Yehia, Fouad Boulos, Mark Jabbour, Ziyad Mahfoud, Najla Fakhruddin, Marwan El-Sabban |
Journal | PloS one
(PLoS One)
Vol. 10
Issue 6
Pg. e0129356
( 2015)
ISSN: 1932-6203 [Electronic] United States |
PMID | 26046764
(Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- ARNT protein, human
- Biomarkers, Tumor
- Hypoxia-Inducible Factor 1, alpha Subunit
- Platelet Endothelial Cell Adhesion Molecule-1
- Vascular Endothelial Growth Factor A
- Aryl Hydrocarbon Receptor Nuclear Translocator
- FLT4 protein, human
- Vascular Endothelial Growth Factor Receptor-3
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Topics |
- Adult
- Aged
- Aged, 80 and over
- Aryl Hydrocarbon Receptor Nuclear Translocator
(genetics, metabolism)
- Biomarkers, Tumor
(genetics, metabolism)
- Breast Neoplasms
(drug therapy, genetics, metabolism)
- Female
- Forecasting
- Gene Expression Regulation, Neoplastic
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit
(antagonists & inhibitors, genetics, metabolism)
- Immunohistochemistry
- Middle Aged
- Molecular Targeted Therapy
(methods, trends)
- Neovascularization, Pathologic
(genetics, metabolism)
- Platelet Endothelial Cell Adhesion Molecule-1
(genetics, metabolism)
- Reverse Transcriptase Polymerase Chain Reaction
- Vascular Endothelial Growth Factor A
(genetics, metabolism)
- Vascular Endothelial Growth Factor Receptor-3
(genetics, metabolism)
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