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Seizer, P.* ; von Ungern-Sternberg, S.N.I.* ; Haug, V.* ; Dicenta, V.* ; Rosa, A.* ; Butt, E.* ; Nöthel, M.* ; Rohlfing, A.K.* ; Sigle, M.* ; Nawroth, P.P. ; Nussbaum, C.* ; Sperandio, M.* ; Kusch, C.* ; Meub, M.* ; Sauer, M.* ; Münzer, P.* ; Bieber, K.* ; Stanger, A.* ; Mack, A.F.* ; Huber, R.* ; Brand, K.* ; Lehners, M.* ; Feil, R.* ; Poso, A.* ; Krutzke, K.* ; Schäffer, T.E.* ; Nieswandt, B.* ; Borst, O.* ; May, A.E.* ; Zernecke, A.* ; Gawaz, M.* ; Heinz Mann, D.*

Cyclophilin A is a ligand for RAGE in thrombo-inflammation.

Cardiovasc. Res. 120, 385-402 (2024)
Postprint DOI PMC
Open Access Green
AIMS: Cyclophilin A (CyPA) induces leukocyte recruitment and platelet activation upon release into the extracellular space. Extracellular CyPA therefore plays a critical role in immuno-inflammatory responses in tissue injury and thrombosis upon platelet activation. To date, CD147 (EMMPRIN) has been described as the primary receptor mediating extracellular effects of CyPA in platelets and leukocytes. The receptor for advanced glycation end products (RAGE) shares inflammatory and prothrombotic properties and has also been found to have similar ligands as CD147.In this study, we investigated the role of RAGE as a previously unknown interaction partner for CyPA. METHODS AND RESULTS: Confocal imaging, proximity ligation, co-immunoprecipitation, and atomic force microscopy were performed and demonstrated an interaction of CyPA with RAGE on the cell surface. Static and dynamic cell adhesion and chemotaxis assays towards extracellular CyPA using human leukocytes and leukocytes from RAGE-deficient Ager-/- mice were conducted. Inhibition of RAGE abrogated CyPA-induced effects on leukocyte adhesion and chemotaxis in vitro. Accordingly, Ager-/- mice showed reduced leukocyte recruitment and endothelial adhesion towards CyPA in vivo. In wildtype mice, we observed a downregulation of RAGE on leukocytes when endogenous extracellular CyPA was reduced. We furthermore evaluated the role of RAGE for platelet activation and thrombus formation upon CyPA stimulation. CyPA-induced activation of platelets was found to be dependent on RAGE, as inhibition of RAGE, as well as platelets from Ager-/- mice showed a diminished activation and thrombus formation upon CyPA stimulation. CyPA-induced signaling through RAGE was found to involve central signaling pathways including the adaptor protein MyD88, intracellular Ca2+ signaling, as well as NF-κB activation. CONCLUSION: We propose RAGE as a hitherto unknown receptor for CyPA mediating leukocyte as well as platelet activation. The CyPA-RAGE interaction thus represents a novel mechanism in thrombo-inflammation.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Cyclophilin A ; Rage ; Inflammation ; Leukocytes ; Platelets ; Thrombosis
Sprache englisch
Veröffentlichungsjahr 2024
HGF-Berichtsjahr 2024
ISSN (print) / ISBN 0008-6363
e-ISSN 1755-3245
Zeitschrift Cardiovascular Research
Quellenangaben Band: 120, Heft: 4, Seiten: 385-402 Artikelnummer: , Supplement: ,
Verlag Oxford University Press
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Diabetes and Cancer (IDC)
POF Topic(s) 90000 - German Center for Diabetes Research
Forschungsfeld(er) Helmholtz Diabetes Center
PSP-Element(e) G-501900-251
DOI 10.1093/cvr/cvad189
Scopus ID 85189465519
PubMed ID 38175781
Erfassungsdatum 2024-01-07
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