Platelet-associated CD154 in immune thrombocytopenic purpura - Inserm - Institut national de la santé et de la recherche médicale Accéder directement au contenu
Article Dans Une Revue Blood Année : 2005

Platelet-associated CD154 in immune thrombocytopenic purpura

Jean-Luc Pellegrin
Jean-François Viallard
  • Fonction : Auteur
Cécile Contin
  • Fonction : Auteur
Julie Déchanet-Merville
  • Fonction : Auteur
Jean-François Moreau
  • Fonction : Auteur

Résumé

CD40-ligand (CD154) is expressed on activated CD4+ T lymphocytes and is essential for the T cell-dependent activation of B lymphocytes. CD154 is also expressed at the activated platelet surface. In this study, we show that platelet-associated CD154 is increased in immune thrombocytopenic purpura (ITP), a disease characterized by an autoimmune response against proteins of the platelet membrane. CD154 and its messenger RNA were also present in increased amounts in the megakaryocytes of patients with ITP. We found that platelet-associated CD154 is competent to induce the CD40-dependent proliferation of B lymphocytes, and we observed an in vitro CD154-dependent production of antibodies to the GPIIb/IIIa complex (integrin alphaIIbbeta3) when platelets and peripheral blood B lymphocytes from ITP patients with circulating anti-GPIIb/IIIa antibody were cultured together. Therefore, platelet-associated CD154 expression is increased in ITP and is able to drive the activation of autoreactive B lymphocytes in this disease.

Dates et versions

inserm-02519491 , version 1 (26-03-2020)

Identifiants

Citer

Anne Solanilla, Jean-Max Pasquet, Jean-François Viallard, Cécile Contin, Christophe F Grosset, et al.. Platelet-associated CD154 in immune thrombocytopenic purpura. Blood, 2005, 105 (1), pp.215-218. ⟨10.1182/blood-2003-07-2367⟩. ⟨inserm-02519491⟩

Collections

INSERM CNRS
10 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More