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Richter K, Mathes V, Fronius M, Althaus M, Hecker A, Krasteva-Christ G, Padberg W, Hone AJ, McIntosh JM, Zakrzewicz A, Grau V. Phosphocholine - an agonist of metabotropic but not of ionotropic functions of α9-containing nicotinic acetylcholine receptors. Sci Rep 2016; 6:28660. [PMID: 27349288 PMCID: PMC4923896 DOI: 10.1038/srep28660] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/06/2016] [Indexed: 11/09/2022] Open
Abstract
We demonstrated previously that phosphocholine and phosphocholine-modified macromolecules efficiently inhibit ATP-dependent release of interleukin-1β from human and murine monocytes by a mechanism involving nicotinic acetylcholine receptors (nAChR). Interleukin-1β is a potent pro-inflammatory cytokine of innate immunity that plays pivotal roles in host defence. Control of interleukin-1β release is vital as excessively high systemic levels cause life threatening inflammatory diseases. In spite of its structural similarity to acetylcholine, there are no other reports on interactions of phosphocholine with nAChR. In this study, we demonstrate that phosphocholine inhibits ion-channel function of ATP receptor P2X7 in monocytic cells via nAChR containing α9 and α10 subunits. In stark contrast to choline, phosphocholine does not evoke ion current responses in Xenopus laevis oocytes, which heterologously express functional homomeric nAChR composed of α9 subunits or heteromeric receptors containing α9 and α10 subunits. Preincubation of these oocytes with phosphocholine, however, attenuated choline-induced ion current changes, suggesting that phosphocholine may act as a silent agonist. We conclude that phophocholine activates immuno-modulatory nAChR expressed by monocytes but does not stimulate canonical ionotropic receptor functions.
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Affiliation(s)
- K. Richter
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, German Centre for Lung Research, Justus-Liebig-University Giessen, Giessen, Germany
| | - V. Mathes
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, German Centre for Lung Research, Justus-Liebig-University Giessen, Giessen, Germany
| | - M. Fronius
- Department of Physiology, University of Otago, Dunedin, New Zealand
| | - M. Althaus
- Institute for Animal Physiology, Justus-Liebig-University of Giessen, Giessen, Germany
| | - A. Hecker
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, German Centre for Lung Research, Justus-Liebig-University Giessen, Giessen, Germany
| | - G. Krasteva-Christ
- Intitute for Anatomy and Cell Biology, Julius-Maximilians-University of Wuerzburg, Wuerzburg, Germany
| | - W. Padberg
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, German Centre for Lung Research, Justus-Liebig-University Giessen, Giessen, Germany
| | - A. J. Hone
- Department of Biology, University of Utah, Salt Lake City, Utah, USA
| | - J. M. McIntosh
- Department of Biology, University of Utah, Salt Lake City, Utah, USA
- George E. Wahlen Veterans Affairs Medical Center, Salt Lake City, Utah, USA
- Department of Psychiatry, University of Utah, Salt Lake City, Utah, USA
| | - A. Zakrzewicz
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, German Centre for Lung Research, Justus-Liebig-University Giessen, Giessen, Germany
| | - V. Grau
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, German Centre for Lung Research, Justus-Liebig-University Giessen, Giessen, Germany
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Müller A, Mathes V, Stumpf M, Hürtgen D, Reiss M, Hauck P, Troppmann U, Laubender M, Schröder J, Kulzer K. Automatisiertes Prozessieren von hochviskosen Flüssigkeiten im Labor. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.200900179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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