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Updated: Jun 1, 2026

Integration of Bioinformatics Approaches and Experimental Validations to Understand the Role of Notch Signaling in Ovarian Cancer
Published on: January 12, 2020
Correlation and coexpression of HIFs and NOTCH markers in NSCLC
Sigve Andersen1, Tom Donnem, Samer Al-Saad
1Institute of Clinical Medicine, University of Tromso, Norway. sigve.andersen@uit.no
Background:
NOTCH and hypoxia pathways are both known to be highly involved in cancer. Because of the close interplay between both of these pathways, we investigated correlation and co-expression of molecules in these pathways.
Materials And Methods:
In 335 unselected stage I-IIIA NSCLC patients, protein expressions of hypoxia inducible factor 1α (HIF1α), hypoxia inducible factor 2α (HIF2α), glucose transporter 1 (GLUT1), lactate dehydrogenase 5 (LDH5), carbonic anhydrase IX (CAIX), delta like 4 (DLL4), JAGGED1, NOTCH1 and NOTCH4, evaluated by immunohistochemistry, were correlated and co-expressions tested in tumor and stromal cells.
Results:
HIF2α and LDH5 correlated moderately with DLL4, JAGGED1 and NOTCH4 in both tumor and stromal compartments (Spearman's r=0.16-0.33). The coexpression of HIF1α and NOTCH1 in tumor was significantly indicative of poor prognosis in univariate analysis. Hypoxia and NOTCH ligands and receptors were moderately correlated.
Conclusion:
The lack of appealing coexpression findings for HIF1α and NOTCH1 may be due to the way HIF1α directly influences NOTCH signalling without depending on an elevated NOTCH expression.
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