Mollenhauer, Martin, Bokredenghel, Senai, Geissen, Simon, Klinke, Anna, Morstadt, Tobias, Torun, Merve, Strauch, Sabrina, Schumacher, Wibke ORCID: 0000-0003-0277-8070, Maass, Martina, Konradi, Juergen, Peters, Vera B. M., Berghausen, Eva, Vantler, Marius, Rosenkranz, Stephan, Mehrkens, Dennis ORCID: 0000-0002-8578-0290, Braumann, Simon, Nettersheim, Felix, Hof, Alexander, Simsekyilmaz, Sakine, Winkels, Holger, Rudolph, Volker, Baldus, Stephan, Adam, Matti and ten Freyhaus, Henrik (2021). Stamp2 Protects From Maladaptive Structural Remodeling and Systolic Dysfunction in Post-Ischemic Hearts by Attenuating Neutrophil Activation. Front. Immunol., 12. LAUSANNE: FRONTIERS MEDIA SA. ISSN 1664-3224

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Abstract

The six-transmembrane protein of prostate 2 (Stamp2) acts as an anti-inflammatory protein in macrophages by protecting from overt inflammatory signaling and Stamp2 deficiency accelerates atherosclerosis in mice. Herein, we describe an unexpected role of Stamp2 in polymorphonuclear neutrophils (PMN) and characterize Stamp2's protective effects in myocardial ischemic injury. In a murine model of ischemia and reperfusion (I/R), echocardiography and histological analyses revealed a pronounced impairment of cardiac function in hearts of Stamp2-deficient- (Stamp2(-/-)) mice as compared to wild-type (WT) animals. This difference was driven by aggravated cardiac fibrosis, as augmented fibroblast-to-myofibroblast transdifferentiation was observed which was mediated by activation of the redox-sensitive p38 mitogen-activated protein kinase (p38 MAPK). Furthermore, we observed increased production of reactive oxygen species (ROS) in Stamp2(-/-) hearts after I/R, which is the likely cause for p38 MAPK activation. Although myocardial macrophage numbers were not affected by Stamp2 deficiency after I/R, augmented myocardial infiltration by polymorphonuclear neutrophils (PMN) was observed, which coincided with enhanced myeloperoxidase (MPO) plasma levels. Primary PMN isolated from Stamp2(-/-) animals exhibited a proinflammatory phenotype characterized by enhanced nuclear factor (NF)-kappa B activity and MPO secretion. To prove the critical role of PMN for the observed phenotype after I/R, antibody-mediated PMN depletion was performed in Stamp2(-/-) mice which reduced deterioration of LV function and adverse structural remodeling to WT levels. These data indicate a novel role of Stamp2 as an anti-inflammatory regulator of PMN and fibroblast-to-myofibroblast transdifferentiation in myocardial I/R injury.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Mollenhauer, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bokredenghel, SenaiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Geissen, SimonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klinke, AnnaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Morstadt, TobiasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Torun, MerveUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Strauch, SabrinaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schumacher, WibkeUNSPECIFIEDorcid.org/0000-0003-0277-8070UNSPECIFIED
Maass, MartinaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Konradi, JuergenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Peters, Vera B. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Berghausen, EvaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vantler, MariusUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rosenkranz, StephanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mehrkens, DennisUNSPECIFIEDorcid.org/0000-0002-8578-0290UNSPECIFIED
Braumann, SimonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nettersheim, FelixUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hof, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simsekyilmaz, SakineUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Winkels, HolgerUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rudolph, VolkerUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baldus, StephanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Adam, MattiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
ten Freyhaus, HenrikUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-576772
DOI: 10.3389/fimmu.2021.701721
Journal or Publication Title: Front. Immunol.
Volume: 12
Date: 2021
Publisher: FRONTIERS MEDIA SA
Place of Publication: LAUSANNE
ISSN: 1664-3224
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
MYOCARDIAL-INFARCTION; INFLAMMATION; MACROPHAGES; ISCHEMIA; MOUSEMultiple languages
ImmunologyMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/57677

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