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Lee GK, Kim CW, Cho IH, Kim HY, Park JH. Eukaryotic initiation factor 5A hypusine as a negative regulator of adenosine 2B receptor (A2bAR) through interaction with stem loop sequences within the A2bAR 3'-untranslated region. Mol Biol Rep 2023. [PMID: 36689050 DOI: 10.1007/s11033-023-08252-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 01/04/2023] [Indexed: 01/24/2023]
Abstract
PURPOSE The aim of this study was to investigate whether eIF5A hypusine (eIF5AHyp) reduces adenosine 2b receptor (A2bAR) gene expression through interaction with highly structured stem-loop sequences within the A2bAR 3'UTR. METHODS AND RESULTS Based on real-time PCR and western blotting, expression of A2bAR mRNA was significantly decreased upon treatment with eIF5AHyp in mouse embryonic fibroblasts of eIF5A (eIF5A-MEF) and 3T3-L1 cells. Target Scan software and RNAfold web server predicted two different structures formed by stem-loop sequences with overlapping microRNA 27 seed sequences and mutations. The EMSA results showed significantly impaired formation of the wild type (WT) biotin-labeled A2bAR probe (27 base) containing stem loop sequences-eIF5AHyp complex by mutation of stem-loop sequences or by eIF5A non-hypusine (eIF5ALys). The luciferase reporter assay showed that GC7-induced eIF5ALys accumulation increased the activity of pMIR-A2bAR WT containing the same stem-loop sequence in 3T3-L1 cells, whereas the activity with pMIR-A2bAR Mut was increased compared to WT control without dependence on GC7. Oil Red O staining showed that suppression of A2bAR expression (A2bAR siRNA and eIF5AHyp) increased the amount of lipid droplet formation and the mRNA levels of lipid droplet-related genes (C/EBP-β, PPAR-γ, FABP4, SREBP-1, and Perilipin). In contrast, overexpression of A2bAR (A2bAR vector, eIF5ALys vector, and GC7) significantly decreased the expression of lipid droplet-associated genes and lipid droplet formation. CONCLUSIONS eIF5AHyp acts as a negative regulator of A2bAR gene expression through stem loop sequences in A2bAR 3'UTR, allowing differentiation of adipocytes.
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Kiers D, Wielockx B, Peters E, van Eijk LT, Gerretsen J, John A, Janssen E, Groeneveld R, Peters M, Damen L, Meneses AM, Krüger A, Langereis JD, Zomer AL, Blackburn MR, Joosten LA, Netea MG, Riksen NP, van der Hoeven JG, Scheffer GJ, Eltzschig HK, Pickkers P, Kox M. Short-Term Hypoxia Dampens Inflammation in vivo via Enhanced Adenosine Release and Adenosine 2B Receptor Stimulation. EBioMedicine 2018; 33:144-156. [PMID: 29983349 PMCID: PMC6085583 DOI: 10.1016/j.ebiom.2018.06.021] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 06/18/2018] [Accepted: 06/18/2018] [Indexed: 01/18/2023] Open
Abstract
Hypoxia and inflammation are closely intertwined phenomena. Critically ill patients often suffer from systemic inflammatory conditions and concurrently experience short-lived hypoxia. We evaluated the effects of short-term hypoxia on systemic inflammation, and show that it potently attenuates pro-inflammatory cytokine responses during murine endotoxemia. These effects are independent of hypoxia-inducible factors (HIFs), but involve augmented adenosine levels, in turn resulting in an adenosine 2B receptor-mediated post-transcriptional increase of interleukin (IL)-10 production. We translated our findings to humans using the experimental endotoxemia model, where short-term hypoxia resulted in enhanced plasma concentrations of adenosine, augmentation of endotoxin-induced circulating IL-10 levels, and concurrent attenuation of the pro-inflammatory cytokine response. Again, HIFs were shown not to be involved. Taken together, we demonstrate that short-term hypoxia dampens the systemic pro-inflammatory cytokine response through enhanced purinergic signaling in mice and men. These effects may contribute to outcome and provide leads for immunomodulatory treatment strategies for critically ill patients.
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Affiliation(s)
- Dorien Kiers
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Anesthesiology, Radboud University Medical Centre, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Ben Wielockx
- Heisenberg Research Group, Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Esther Peters
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands; Department of Pharmacology and Toxicology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Lucas T van Eijk
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Jelle Gerretsen
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Aaron John
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Emmy Janssen
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Rianne Groeneveld
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Mara Peters
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Lars Damen
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Ana M Meneses
- Heisenberg Research Group, Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Anja Krüger
- Heisenberg Research Group, Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Jeroen D Langereis
- Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands; Laboratory of Pediatric Infectious Diseases, Department of Pediatrics, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Aldert L Zomer
- Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands; Laboratory of Pediatric Infectious Diseases, Department of Pediatrics, Radboud University Medical Center, Nijmegen, the Netherlands; Centre for Molecular and Biomolecular Informatics (CMBI) Bacterial Genomics, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Michael R Blackburn
- Department of Biochemistry & Molecular Biology, McGovern Medical School, University of Texas, USA
| | - Leo A Joosten
- Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands; Department of Internal Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Mihai G Netea
- Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands; Department of Internal Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Niels P Riksen
- Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands; Department of Internal Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Johannes G van der Hoeven
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Gert-Jan Scheffer
- Department of Anesthesiology, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Holger K Eltzschig
- Center for Perioperative Medicine, Department of Anesthesiology, McGovern Medical School, The University of Texas Health Science Center, Houston, USA
| | - Peter Pickkers
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Matthijs Kox
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, the Netherlands; Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands.
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