Huang, H, Vandekeere, S, Kalucka, J et al. (17 more authors) (2017) Role of glutamine and interlinked asparagine metabolism in vessel formation. The EMBO Journal, 36 (16). pp. 2334-2352. ISSN 0261-4189
Abstract
Endothelial cell (EC) metabolism is emerging as a regulator of angiogenesis, but the precise role of glutamine metabolism in ECs is unknown. Here, we show that depriving ECs of glutamine or inhibiting glutaminase 1 (GLS1) caused vessel sprouting defects due to impaired proliferation and migration, and reduced pathological ocular angiogenesis. Inhibition of glutamine metabolism in ECs did not cause energy distress, but impaired tricarboxylic acid (TCA) cycle anaplerosis, macromolecule production, and redox homeostasis. Only the combination of TCA cycle replenishment plus asparagine supplementation restored the metabolic aberrations and proliferation defect caused by glutamine deprivation. Mechanistically, glutamine provided nitrogen for asparagine synthesis to sustain cellular homeostasis. While ECs can take up asparagine, silencing asparagine synthetase (ASNS, which converts glutamine‐derived nitrogen and aspartate to asparagine) impaired EC sprouting even in the presence of glutamine and asparagine. Asparagine further proved crucial in glutamine‐deprived ECs to restore protein synthesis, suppress ER stress, and reactivate mTOR signaling. These findings reveal a novel link between endothelial glutamine and asparagine metabolism in vessel sprouting.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2017, The Authors. This is an author produced version of a paper published in the EMBO Journal. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | angiogenesis; asparagine; endothelial cell; glutamine; metabolism |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Genetics, Health and Therapeutics (LIGHT) > Academic Unit of Cardiovascular Medicine (Leeds) |
Funding Information: | Funder Grant number British Heart Foundation SS/CH/92005 British Heart Foundation FS/12/80/29821 British Heart Foundation tbc Oct 2017 |
Depositing User: | Symplectic Publications |
Date Deposited: | 03 Jul 2017 17:11 |
Last Modified: | 28 Dec 2017 01:38 |
Status: | Published |
Publisher: | EMBO Press |
Identification Number: | 10.15252/embj.201695518 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:118500 |