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Sharma N, Nagaraj C, Nagy BM, Marsh LM, Bordag N, Zabini D, Wygrecka M, Klepetko W, Gschwandtner E, Genové G, Heinemann A, Weir EK, Kwapiszewska G, Olschewski H, Olschewski A. RGS5 Determines Neutrophil Migration in the Acute Inflammatory Phase of Bleomycin-Induced Lung Injury. Int J Mol Sci 2021; 22:ijms22179342. [PMID: 34502263 PMCID: PMC8430858 DOI: 10.3390/ijms22179342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 08/22/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022] Open
Abstract
The regulator of G protein signaling (RGS) represents a widespread system of controllers of cellular responses. The activities of the R4 subfamily of RGSs have been elucidated in allergic pulmonary diseases. However, the R4 signaling in other inflammatory lung diseases, with a strong cellular immune response, remained unexplored. Thus, our study aimed to discern the functional relevance of the R4 family member, RGS5, as a potential modulating element in this context. Gene profiling of the R4 subfamily showed increased RGS5 expression in human fibrosing lung disease samples. In line with this, RGS5 was markedly increased in murine lungs following bleomycin injury. RGS knock-out mice (RGS-/-) had preserved lung function while control mice showed significant combined ventilatory disorders three days after bleomycin application as compared to untreated control mice. Loss of RGS5 was associated with a significantly reduced neutrophil influx and tissue myeloperoxidase expression. In the LPS lung injury model, RGS5-/- mice also failed to recruit neutrophils into the lung, which was accompanied by reduced tissue myeloperoxidase levels after 24 h. Our in-vitro assays showed impaired migration of RGS5-/- neutrophils towards chemokines despite preserved Ca2+ signaling. ERK dephosphorylation might play a role in reduced neutrophil migration in our model. As a conclusion, loss of RGS5 preserves lung function and attenuates hyperinflammation in the acute phase of bleomycin-induced pulmonary fibrosis and LPS-induced lung injury. Targeting RGS5 might alleviate the severity of exacerbations in interstitial lung diseases.
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Affiliation(s)
- Neha Sharma
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
- Experimental Anaesthesiology, Department of Anaesthesiology and Intensive Care Medicine, Medical University of Graz, 8036 Graz, Austria
| | - Chandran Nagaraj
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
| | - Bence M. Nagy
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
| | - Leigh M. Marsh
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
| | - Natalie Bordag
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
- Department of Dermatology and Venereology, Medical University of Graz, 8036 Graz, Austria
| | - Diana Zabini
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
- Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
| | - Malgorzata Wygrecka
- Department of Biochemistry, Universities of Giessen and Marburg Lung Center, Justus Liebig University of Giessen, Friedrichstrasse 24, 35392 Giessen, Germany;
| | - Walter Klepetko
- Department of Thoracic Surgery, Medical University of Vienna, 1090 Vienna, Austria; (W.K.); (E.G.)
| | - Elisabeth Gschwandtner
- Department of Thoracic Surgery, Medical University of Vienna, 1090 Vienna, Austria; (W.K.); (E.G.)
| | - Guillem Genové
- Integrated CardioMetabolic Centre (ICMC), Department of Medicine, Karolinska Institute, 171 77 Huddinge, Sweden;
| | - Akos Heinemann
- Otto Loewi Research Center for Vascular Biology, Immunology and Inflammation, Division of Pharmacology, Medical University of Graz, 8010 Graz, Austria;
| | - E Kenneth Weir
- Department of Medicine, University of Minnesota, Minneapolis, MN 55455, USA;
| | - Grazyna Kwapiszewska
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
- Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
| | - Horst Olschewski
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
- Department of Internal Medicine, Division of Pulmonology, Medical University of Graz, 8036 Graz, Austria
| | - Andrea Olschewski
- Ludwig Boltzmann Institute for Lung Vascular Research, 8010 Graz, Austria; (N.S.); (C.N.); (B.M.N.); (L.M.M.); (N.B.); (D.Z.); (G.K.); (H.O.)
- Experimental Anaesthesiology, Department of Anaesthesiology and Intensive Care Medicine, Medical University of Graz, 8036 Graz, Austria
- Correspondence: ; Tel.: +43-(0)316-385-72057
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