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Prolyl hydroxylase 2 inactivation enhances glycogen storage and promotes excessive neutrophilic responses.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Sadiku, Pranvera 
Willson, Joseph A 
Dickinson, Rebecca S 
Murphy, Fiona 
Harris, Alison J 

Abstract

Fully activated innate immune cells are required for effective responses to infection, but their prompt deactivation and removal are essential for limiting tissue damage. Here, we have identified a critical role for the prolyl hydroxylase enzyme Phd2 in maintaining the balance between appropriate, predominantly neutrophil-mediated pathogen clearance and resolution of the innate immune response. We demonstrate that myeloid-specific loss of Phd2 resulted in an exaggerated inflammatory response to Streptococcus pneumonia, with increases in neutrophil motility, functional capacity, and survival. These enhanced neutrophil responses were dependent upon increases in glycolytic flux and glycogen stores. Systemic administration of a HIF-prolyl hydroxylase inhibitor replicated the Phd2-deficient phenotype of delayed inflammation resolution. Together, these data identify Phd2 as the dominant HIF-hydroxylase in neutrophils under normoxic conditions and link intrinsic regulation of glycolysis and glycogen stores to the resolution of neutrophil-mediated inflammatory responses. These results demonstrate the therapeutic potential of targeting metabolic pathways in the treatment of inflammatory disease.

Description

Keywords

Acute Disease, Animals, Bronchoalveolar Lavage, Colitis, Glycogen, Glycolysis, Humans, Hypoxia-Inducible Factor-Proline Dioxygenases, Immunity, Innate, Inflammation, Leukocytes, Lung Injury, Mice, Mice, Inbred C57BL, Neutrophils, Phenotype, Pneumococcal Infections, Signal Transduction

Journal Title

Journal of Clinical Investigation

Conference Name

Journal ISSN

0021-9738
1558-8238

Volume Title

127

Publisher

American Society for Clinical Investigation
Sponsorship
Wellcome Trust (096956/Z/11/Z)
Department of Health (via National Institute for Health Research (NIHR)) (NF-SI-0514-10122)
Medical Research Council (MR/P502091/1)
This work was principally supported by a Wellcome Trust Senior Clinical Fellowship award (098516 to SRW), Medical Research Council (MRC) Clinical Training Fellowship awards (G0802255 to AART; MR/K023845/1 to RSD), an Academy of Medical Sciences (AMS) starter grant (to AART), a Wellcome Trust Senior Clinical Fellowship award (076945 to DHD), British Lung Foundation Fellowship (F05/7 to HMM), and a Engineering and Physical Sciences Research Council and Medical Research Council grant (EP/L016559/1, JAW). The MRC /University of Edinburgh Centre for Inflammation Research is supported by an MRC Centre Grant. The work of PC is supported by long-term structural funding-Methusalem funding from the Flemish Government. CJS thanks the Wellcome Trust and Cancer Research UK for support.