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Open Access 01-12-2018 | Research article

HIF1-alpha expressing cells induce a hypoxic-like response in neighbouring cancer cells

Published in: BMC Cancer | Issue 1/2018

Abstract

Background

Hypoxia stimulates metastasis in cancer and is linked to poor patient prognosis. In tumours, oxygen levels vary and hypoxic regions exist within a generally well-oxygenated tumour. However, whilst the heterogeneous environment is known to contribute to metastatic progression, little is known about the mechanism by which heterogeneic hypoxia contributes to cancer progression. This is largely because existing experimental models do not recapitulate the heterogeneous nature of hypoxia.

The primary effector of the hypoxic response is the transcription factor Hypoxia inducible factor 1-alpha (HIF1-alpha). HIF1-alpha is stabilised in response to low oxygen levels in the cellular environment and its expression is seen in hypoxic regions throughout the tumour.

Methods

We have developed a model system in which HIF1-alpha can be induced within a sub-population of cancer cells, thus enabling us to mimic the effects of heterogeneic HIF1-alpha expression.

Results

We show that induction of HIF1-alpha not only recapitulates elements of the hypoxic response in the induced cells but also results in significant changes in proliferation, gene expression and mammosphere formation within the HIF1-alpha negative population.

Conclusions

These findings suggest that the HIF1-alpha expressing cells found within hypoxic regions are likely to contribute to the subsequent progression of a tumour by modifying the behaviour of cells in the non-hypoxic regions of the local micro-environment.

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Title: HIF1-alpha expressing cells induce a hypoxic-like response in neighbouring cancer cells
Publication date: 01-12-2018
Published in: BMC Cancer / Issue 1/2018
Electronic ISSN: 1471-2407
DOI: https://doi.org/10.1186/s12885-018-4577-1

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Abstract

Background

Methods

Results

Conclusions

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