The cellular immunology associated with autoimmune thrombocytopenic purpura: an update. |
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Authors: | J W Semple A H Lazarus J Freedman |
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Affiliation: | Division of Haematology, St Michael's Hospital, Ontario, Canada. semple@smh.toronto.on.ca |
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Abstract: | Chronic autoimmune thrombocytopenic purpura (AITP) is an organ specific autoimmune bleeding disease in which autoantibodies are directed against the individual's own platelets, resulting in increased Fc-mediated platelet destruction by macrophages in the reticuloendothelial system. Although AITP is primarily mediated by IgG auto-antibodies, their production is regulated by the influence of T lymphocytes and antigen presenting cells (APC). This review argues that enhanced T helper cell/antigen presenting cell interactions in patients with AITP may be responsible for IgG anti-platelet auto-antibody production. Understanding these cellular immune responses in AITP may lead to the development of more immune specific therapies for the management of this disease. |
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