Antibodies against the CUB1-2 domains of ADAMTS13 in a patient with benign monoclonal gammopathy: no causal relationship.
SourceHaematologica, 92, 7, (2007), pp. e74-6
Article / Letter to editor
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Blood Transfusion and Transplantation Immunology
SubjectN4i 1: Pathogenesis and modulation of inflammation; NCEBP 14: Cardiovascular diseases; UMCN 1.5: Interventional oncology; UMCN 2.2: Vascular medicine and diabetes; UMCN 3.3: Neurosensory disorders; UMCN 4.1: Microbial pathogenesis and host defense
We present a patient with a history of benign monoclonal gammopathy, who developed thrombotic thrombocytopenic purpura (TTP), initially presenting as bilateral serous retinal detachment. Plasma of the patient contained high titers of anti ADAMTS13 antibodies that were directed towards the disintegrin/TSR1/cysteine-rich/spacer and CUB1-2 domains. ADAMTS13 activity was undetectable. Total IgG purified from plasma of the patient partially inhibited ADAMTS13 activity. In contrast, the isolated M-protein did neither bind to, nor inhibit activity of ADAMTS13. We conclude that in this patient the monoclonal gammopathy and TTP co-existed as distinct pathological entities.
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