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Immobilized amyloid Aβ peptides support platelet adhesion and activation

2013; Wiley; Volume: 587; Issue: 16 Linguagem: Inglês

10.1016/j.febslet.2013.06.041

1873-3468

Ilaria Canobbio, Silvia Catricalà, Laura Giuseppina Di Pasqua, Gianni Francesco Guidetti, Alessandra Consonni, Daria Manganaro, Mauro Torti,

Diabetes Treatment and Management

Accumulation of amyloidogenic Aβ peptides in the brain contributes to the onset of Alzheimer disease. Aβ peptide deposits are also present in blood vessel walls, mainly deriving from circulating platelets. However, their effect on platelet function is unclear. We demonstrate that immobilized Aβ peptides induce platelet adhesion and spreading through metalloproteinase‐sensitive surface receptors. Aβ peptides also fasten platelet spreading on collagen, and support the time‐ and ADP‐dependent activation of adherent platelets, leading to stimulation of several signalling proteins. Our results indicate a potential role for peripheral Aβ peptides in promoting platelet adhesion and activation in the initiation of thrombus formation.