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Cell Immunol. 2005 Nov;238(1):1-9. Epub 2006 Jan 26.

The emerging role of platelets in adaptive immunity.

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  • 1Department of Urology, University of Iowa, USA.


Platelets' foremost role in survival is hemostasis. However, a significant quantity of research has demonstrated that platelets are an integral part of inflammation and can also be potent effector cells of the innate immune response. CD154, a molecule of vital importance to adaptive immune responses, is expressed by activated platelets and has been implicated in platelet-mediated modulation of innate immunity and inflammatory disease states. Recent studies in mice extend the role of platelet CD154 to the adaptive immune response demonstrating that platelets can enhance antigen presentation, improve CD8 T cell responses, and play a critical function in normal T-dependent humoral immunity. The latter studies suggest that the current paradigm for the B cell germinal center response should be modified to include a role for platelets.

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