Platelet Transfusion Refractoriness

Characterization of Anti-HLA I Antibodies Involved in Platelet Transfusion Refractoriness: Optimization of the Transfusion Management of Patients With Severe Thrombocytopenia

Platelet Transfusion Refractoriness is one of the severe complications after multiple transfusions in patients with severe thrombopenia. Platelet Transfusion Refractoriness is characterized by inefficient transfusion and arise from allo-antibodies specific of platelets antigenes, mostly carried by HLA-I molecules.

A preliminary study has shown different isotypes of anti-HLA I in patients with Platelet Transfusion Refractoriness. Our hypothesis is that the type of anti-HLA I antibodies (recognised epitope, quantity, isotype) should establish predictive and diagnostic criteria for Platelet Transfusion Refractoriness.

Inclusion Criteria:

• Adult patient with Hematopoietic stem cells graft (autograft or allograft) or with acute leukemia with the indication of platelet transfusion.

Exclusion Criteria:

• Patient under guardianship
• Minor patient