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| Hauptseite > Publikationsdatenbank > Reelin Amplifies Glycoprotein VI Activation and AlphaIIb Beta3 Integrin Outside-In Signaling via PLC Gamma 2 and Rho GTPases > print |
| Hauptseite > Publikationsdatenbank > Reelin Amplifies Glycoprotein VI Activation and AlphaIIb Beta3 Integrin Outside-In Signaling via PLC Gamma 2 and Rho GTPases > print |
| 001 | 889872 | ||
| 005 | 20210208142411.0 | ||
| 024 | 7 | _ | |a 10.1161/ATVBAHA.120.314902 |2 doi |
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| 100 | 1 | _ | |a Krueger, Irena |0 0000-0001-8451-4188 |b 0 |
| 245 | _ | _ | |a Reelin Amplifies Glycoprotein VI Activation and AlphaIIb Beta3 Integrin Outside-In Signaling via PLC Gamma 2 and Rho GTPases |
| 260 | _ | _ | |a Stanford, Calif. |c 2020 |b HighWire |
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| 520 | _ | _ | |a Objective:Reelin, a secreted glycoprotein, was originally identified in the central nervous system, where it plays an important role in brain development and maintenance. In the cardiovascular system, reelin plays a role in atherosclerosis by enhancing vascular inflammation and in arterial thrombosis by promoting platelet adhesion, activation, and thrombus formation via APP (amyloid precursor protein) and GP (glycoprotein) Ib. However, the role of reelin in hemostasis and arterial thrombosis is not fully understood to date.Approach and Results:In the present study, we analyzed the importance of reelin for cytoskeletal reorganization of platelets and thrombus formation in more detail. Platelets release reelin to amplify alphaIIb beta3 integrin outside-in signaling by promoting platelet adhesion, cytoskeletal reorganization, and clot retraction via activation of Rho GTPases RAC1 (Ras-related C3 botulinum toxin substrate) and RhoA (Ras homolog family member A). Reelin interacts with the collagen receptor GP (glycoprotein) VI with subnanomolar affinity, induces tyrosine phosphorylation in a GPVI-dependent manner, and supports platelet binding to collagen and GPVI-dependent RAC1 activation, PLC gamma 2 (1-phosphatidylinositol-4,5-bisphosphate phosphodiesterase gamma-2) phosphorylation, platelet activation, and aggregation. When GPVI was deleted from the platelet surface by antibody treatment in reelin-deficient mice, thrombus formation was completely abolished after injury of the carotid artery while being only reduced in either GPVI-depleted or reelin-deficient mice.Conclusions:Our study identified a novel signaling pathway that involves reelin-induced GPVI activation and alphaIIb beta3 integrin outside-in signaling in platelets. Loss of both, GPVI and reelin, completely prevents stable arterial thrombus formation in vivo suggesting that inhibiting reelin-platelet-interaction might represent a novel strategy to avoid arterial thrombosis in cardiovascular disease. |
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| 700 | 1 | _ | |a Klier, Meike |0 0000-0003-4903-5485 |b 3 |
| 700 | 1 | _ | |a Jurk, Kerstin |0 0000-0001-5313-4035 |b 4 |
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| 700 | 1 | _ | |a Bock, Hans H. |0 0000-0002-5476-7464 |b 6 |
| 700 | 1 | _ | |a Elvers, Margitta |0 0000-0002-3234-9341 |b 7 |e Corresponding author |
| 773 | _ | _ | |a 10.1161/ATVBAHA.120.314902 |g Vol. 40, no. 10, p. 2391 - 2403 |0 PERI:(DE-600)1494427-3 |n 10 |p 2391 - 2403 |t Arteriosclerosis, thrombosis, and vascular biology |v 40 |y 2020 |x 1524-4636 |
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