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Thromb Haemost. 2018 Dec;118(12):2098-2111. doi: 10.1055/s-0038-1675604. Epub 2018 Nov 19.

The Actin Regulator Coronin-1A Modulates Platelet Shape Change and Consolidates Arterial Thrombosis.

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Medizinische Klinik und Poliklinik I, Klinikum der Universität München, Ludwig-Maximilians-Universität München, Munich, Germany.
DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany.
Institute for the Prevention of Cardiovascular Diseases (IPEK), Ludwig-Maximilians-Universität München, Munich, Germany.
Department of Biomedical Engineering, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands.
Walter Brendel Centre of Experimental Medicine, Department of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-Universität, Planegg-Martinsried, Germany.
Department of Cell Biology (Anatomy III), Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany.
Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands.


Coronin-1A (Coro1A) belongs to a family of highly conserved actin-binding proteins that regulate cytoskeletal re-arrangement. In mammalians, Coro1A expression is most abundant in the haematopoietic lineage, where it regulates various cellular processes. The role of Coro1A in platelets has been previously unknown. Here, we identified Coro1A in human and mouse platelets. Genetic absence of Coro1A in mouse platelets inhibited agonist-induced actin polymerization and altered cofilin phosphoregulation, leading to a reduction in spreading and low-dose collagen induced aggregation. Furthermore, Coro1A-deficient mice displayed a defect in ferric chloride-induced arterial thrombosis with prolonged thrombus formation and reduced thrombus size. Immunofluorescence analysis revealed a less compact thrombus structure with reduced density of platelets and fibrinogen. In summary, Coro1A has a role in platelet biology with impact on spreading, aggregation and thrombosis.

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