Long noncoding RNA GATA2-AS1 augments endothelial hypoxia inducible factor 1-α induction and regulates hypoxic signaling.

Autor:	Man HSJ; Temerty Faculty of Medicine, Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University of Toronto, Toronto, Ontario, Canada; Division of Respirology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada., Subramaniam N; Temerty Faculty of Medicine, Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada., Downs T; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada., Sukumar AN; Temerty Faculty of Medicine, Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada., Saha AD; Temerty Faculty of Medicine, Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada., Nair R; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada., Chen L; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada., Teitelbaum D; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada., Turgeon PJ; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada., Ku KH; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada., Tran E; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada., de Perrot M; Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University of Toronto, Toronto, Ontario, Canada; Division of Thoracic Surgery, Toronto General Hospital, Toronto, Ontario, Canada., Marsden PA; Temerty Faculty of Medicine, Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada; Keenan Research Centre in the Li Ka Shing Knowledge Institute, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada; Division of Nephrology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada. Electronic address: p.marsden@utoronto.ca.
Jazyk:	angličtina
Zdroj:	The Journal of biological chemistry [J Biol Chem] 2023 May; Vol. 299 (5), pp. 103029. Date of Electronic Publication: 2023 Feb 17.
DOI:	10.1016/j.jbc.2023.103029
Abstrakt:	Vascular endothelial cells form the inner cellular lining of blood vessels and have myriad physiologic functions including angiogenesis and response to hypoxia. We recently identified a set of endothelial cell (EC)-enriched long noncoding RNAs (lncRNAs) in differentiated human primary cell types and described the role of the STEEL lncRNA in angiogenic patterning. We sought to further understand the role of EC-enriched lncRNAs in physiologic adaptation of the vascular endothelium. In this work, we describe an abundant, cytoplasmic, and EC-enriched lncRNA, GATA2-AS1, that is divergently transcribed from the EC-enriched developmental regulator, GATA2. While GATA2-AS1 is largely coexpressed with GATA2 in ECs, GATA2-AS1 and GATA2 appear to be complementary rather than synergistic as they have mostly distinct target genes. Common single nucleotide variants in GATA2-AS1 exons are associated with early-onset coronary artery disease and decreased expression of GATA2-AS1 in endothelial cell lines. In most cells, HIF1-α is central to the transcriptional response to hypoxia, while in ECs, both HIF1-α and HIF2-α are required to coordinate an acute and chronic response, respectively. In this setting, GATA2-AS1 contributes to the "HIF switch" and augments HIF1-α induction in acute hypoxia to regulate HIF1-α/HIF2-α balance. In hypoxia, GATA2-AS1 orchestrates HIF1-α-dependent induction of the glycolytic pathway and HIF1-α-independent maintenance of mitochondrial biogenesis. Similarly, GATA2-AS1 coordinates both metabolism and "tip/stalk" cell signaling to regulate angiogenesis in hypoxic ECs. Furthermore, we find that GATA2-AS1 expression patterns are perturbed in atherosclerotic disease. Together, these results define a role for GATA2-AS1 in the EC-specific response to hypoxia. Competing Interests: Conflict of interest The authors declare that they have no conflicts of interest with the contents of this article. (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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