Volume 134, Issue 4 pp. 849-858
Tumor Immunology

Loss of prolyl hydroxylase-2 in myeloid cells and T-lymphocytes impairs tumor development

Soulafa Mamlouk

Soulafa Mamlouk

Emmy Noether Research Group, University of Technology, Dresden, Germany

Institute of Pathology, University of Technology Dresden, Dresden, Germany

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Joanna Kalucka

Joanna Kalucka

Emmy Noether Research Group, University of Technology, Dresden, Germany

Institute of Pathology, University of Technology Dresden, Dresden, Germany

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Rashim Pal Singh

Rashim Pal Singh

Emmy Noether Research Group, University of Technology, Dresden, Germany

Institute of Pathology, University of Technology Dresden, Dresden, Germany

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Kristin Franke

Kristin Franke

Emmy Noether Research Group, University of Technology, Dresden, Germany

Institute of Pathology, University of Technology Dresden, Dresden, Germany

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Antje Muschter

Antje Muschter

Emmy Noether Research Group, University of Technology, Dresden, Germany

Institute of Pathology, University of Technology Dresden, Dresden, Germany

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Anika Langer

Anika Langer

Emmy Noether Research Group, University of Technology, Dresden, Germany

Institute of Pathology, University of Technology Dresden, Dresden, Germany

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Christiane Jakob

Christiane Jakob

Institute of Pathology, University of Technology Dresden, Dresden, Germany

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Max Gassmann

Max Gassmann

Institute of Veterinary Physiology, Vetsuisse Faculty and Zurich Center for Integrative Human Physiology (ZIHP), University of Zürich, Zürich, Switzerland

Universidad Peruana Cayetano Heredia (UPCH), Lima, Peru

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Gustavo B. Baretton

Gustavo B. Baretton

Institute of Pathology, University of Technology Dresden, Dresden, Germany

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Ben Wielockx

Ben Wielockx

Emmy Noether Research Group, University of Technology, Dresden, Germany

Institute of Pathology, University of Technology Dresden, Dresden, Germany

DFG Research Center and Cluster of Excellence for Regenerative Therapies Dresden, University of Technology Dresden, Dresden, Germany

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First published: 03 August 2013
Citations: 28
Correspondence to: Ben Wielockx, PhD, Emmy Noether Group Leader (DFG), Institute of Pathology, University of Technology Dresden, Schubertstrasse 15, D-01307 Dresden, Germany, Fax: +49-351-4584328, E-mail: [email protected]

Abstract

The tumor microenvironment plays a pivotal role during cancer development and progression. The balance between suppressive and cytotoxic responses of the tumor immune microenvironment has been shown to have a direct effect on the final outcome in various human and experimental tumors. Recently, we demonstrated that the oxygen sensor HIF-prolyl hydroxylase-2 (PHD2) plays a detrimental role in tumor cells, stimulating systemic growth and metastasis in mice. In our current study, we show that the conditional ablation of PHD2 in the hematopoietic system also leads to reduced tumor volume, intriguingly generated by an imbalance between enhanced cell death and improved proliferation of tumor cells. This effect seems to rely on the overall downregulation of protumoral as well as antitumoral cytokines. Using different genetic approaches, we were able to confine this complex phenotype to the crosstalk of PHD2-deficient myeloid cells and T-lymphocytes. Taken together, our findings reveal a multifaceted role for PHD2 in several hematopoietic lineages during tumor development and might have important implications for the development of tumor therapies in the future.

Abstract

What's new?

Here the authors describe the complex role of the oxygen sensor PHD2 in tumor-associated immune cells in a conditional PHD2-deficient mouse line. They demonstrate that the observed reduced tumor volume is a consequence of opposing changes including the drastic down-regulation of numerous pro- as well as anti-tumoral genes and an imbalance between enhanced cell death and greater proliferation of tumor cells. They confined this complex phenotype to the crosstalk of PHD2-deficient myeloid cells and T-lymphocytes. The findings reveal a multifaceted role for PHD2 in hematopoietic lineages during tumor development and might have important implications for the development of tumor therapies.

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