{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T02:26:08Z","timestamp":1780539968239,"version":"3.54.1"},"reference-count":19,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2006,7,11]],"date-time":"2006-07-11T00:00:00Z","timestamp":1152576000000},"content-version":"vor","delay-in-days":4880,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American J Hematol"],"published-print":{"date-parts":[[1993,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Six patients with thrombotic microangiopathy associated with drug therapy had serial analyses of von Willebrand factor (vWF) multimeric patterns in their EDTA\u2010plasma samples by sodium dodecyl sulfate\u20101% agarose gel electrophoresis and autoradiography. In the plasma of five patients (one with chronic myelogenous leukemia, two with prostatic cancer, and two with lymphoma), vWF abnormalities were observed during evolution of the thrombotic microangiopathy. These abnormalities were either the presence of unusually large (UL)vWF multimers of the type similar to those found within, and released or secreted by, endothelial cells (three patients) or a relative decrease in the largest plasma vWF multimers of the type that can be induced to attach to platelets (one patient) or both vWF abnormalities in different serial samples (one patient). In the one cardiac transplant patient who did not develop vWF multimeric abnormalities associated with thrombotic microangiopathy, vWF antigen levels were elevated more than threefold. This later individual received therapy with cyclosporin A alone. The other five thrombotic microangiopathy patients received cyclosporin A in combination with other chemotherapeutic agents (two patients); mitomycin\u2010C, along with other chemotherapy (two patients); or multiple chemotherapeutic drugs, but not cyclosporin A or mitomycin C (one patient). The finding of vWF multimeric abnormalities during serial analysis of plasma samples from five of six patients with drug\u2010associated thrombotic microangiopathy suggests the possibility that ULvWF forms derived from damaged or stimulated endothelial cells, along with the largest plasma vWF multimers, may be involved in the intravascular platelet clumping that is an essential part of the pathophysiology of this disorder. \u00a9 1993 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ajh.2830420306","type":"journal-article","created":{"date-parts":[[2007,2,21]],"date-time":"2007-02-21T13:19:17Z","timestamp":1172063957000},"page":"268-277","source":"Crossref","is-referenced-by-count":35,"title":["Abnormalities of von willebrand factor multimers in drug\u2010associated thrombotic microangiopathies"],"prefix":"10.1002","volume":"42","author":[{"given":"Deane","family":"Charba","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joel 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