Increased expression of hypoxia-inducible factor-1 alpha and its impact on transcriptional changes and prognosis in malignant tumours of the ocular adnexa.

Autor: Lange CAK; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany. clemens.lange@uniklinik-freiburg.de., Lehnert P; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany., Boneva SK; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany., Zhang P; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany., Ludwig F; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany., Boeker M; Institute for Medical Biometry and Statistics, Faculty of Medicine and Medical Center, University of Freiburg, Freiburg, Germany.; Clinical Cancer Registry, Comprehensive Cancer Center Freiburg, Medical Center - University of Freiburg, Freiburg, Germany., Hoffmeier K; GenXPro GmbH, Frankfurt Innovation Center Biotechnology, Frankfurt, Germany., Horres R; GenXPro GmbH, Frankfurt Innovation Center Biotechnology, Frankfurt, Germany., Schlunck G; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany., Reinhard T; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany., Böhringer D; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany., Auw-Haedrich C; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
Jazyk: angličtina
Zdroj: Eye (London, England) [Eye (Lond)] 2018 Nov; Vol. 32 (11), pp. 1772-1782. Date of Electronic Publication: 2018 Jul 31.
DOI: 10.1038/s41433-018-0172-6
Abstrakt: Purpose: To investigate the expression profile of the hypoxia-inducible transcription factor-1α (HIF-1α) and its downstream targets in malignancies of the ocular adnexa and to determine its relevance as a prognostic factor for clinical outcome.
Methods: We included 49 subjects with malignant tumours (25 squamous cell carcinomas (SCC), 15 non-Hodgkin lymphomas, 9 melanomas) and 30 patients with benign tumours of the ocular adnexa (13 papillomas, 7 reactive lymphoid hyperplasias (RLHs) and 10 nevi) as controls. We quantified HIF-1α protein expression by immunohistochemistry and assessed the association between HIF-1α and clinical outcome via Kaplan-Meier analysis. Furthermore, we assessed the expression of HIF-1α downstream factors by transcriptional sequencing using the MACE (massive analysis of cDNA ends) technology.
Results: SCCs revealed a strong HIF-1α expression in 61% of tumour cells in comparison with only 22% in papillomas (p < 0.0001). In contrast, malignant melanomas and lymphomas revealed a similar HIF-1α expression compared with nevi and RLHs. Transcriptional sequencing and Gene Ontology Cluster analysis demonstrated 37 hypoxia-associated factors, including HIF-1α, VEGF, SFRP1 and LOXL2 that are significantly increased in SCC and may contribute to tumour proliferation, angiogenesis, and metastasis. Association analysis between HIF-1α immunoreactivity and clinical outcome revealed a trend towards an unfavourable prognosis in malignant tumours with increased HIF-1α expression.
Conclusions: HIF-1α protein is increased in malignant tumours of the ocular adnexa, which is associated with an increase in multiple HIF-1α-downstream factors and a trend towards an unfavourable clinical outcome.
Databáze: MEDLINE
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