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TPO, but not soluble-IL-6 receptor, levels increase after anagrelide treatment of thrombocythemia in chronic myeloproliferative disorders
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2008 (English)In: International journal of medical sciences, ISSN 1449-1907, Vol. 5, no 2, 87-91 p.Article in journal (Refereed) Published
Abstract [en]

Anagrelide is often used in the treatment of thrombocythemia in myeloproliferative disease (MPD), but information concerning effects of treatment on cytokines involved in regulation of blood platelet levels is limited. Here, we investigated serum levels of thrombopoietin (TPO) and soluble IL-6 receptor (sIL-6R) in relation to response to treatment with and plasma concentrations of anagrelide. Samples from 45 patients with thrombocythemia due to MPD (ET=31, PV=14), being treated with anagrelide for 6 months, were analyzed for TPO, sIL-6R and anagrelide levels. The mean baseline platelet count was 983x10(9)/L. A reduction of platelets to <600 in asymptomatic or <400 x 10(9)/L in symptomatic patients was defined as a complete remission (CR), a reduction with >50% of baseline as partial remission, and <50% reduction as failure. At 6 months, 35 patients were in CR, 1 had a partial remission and 9 were treatment failures. For all patients, there was an increase in TPO of 44% from baseline; this change was more pronounced for patients with partial remission and failure. sIL-6R levels did not change significantly. There was no correlation between levels of anagrelide and cytokine levels at 6 months, and changes of cytokine levels did not relate to changes of platelet counts. Thus, a pronounced increase of TPO levels after 6 months of anagrelide treatment indicated that this treatment affected a major regulatory mechanism for megakaryocyte and platelet formation in MPD.

Place, publisher, year, edition, pages
2008. Vol. 5, no 2, 87-91 p.
Keyword [en]
thrombocythemia, anagrelide, thrombopoietin, IL-6, soluble receptors
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-16152PubMedID: 18414650OAI: oai:DiVA.org:uu-16152DiVA: diva2:43923
Available from: 2008-05-05 Created: 2008-05-05 Last updated: 2010-12-15Bibliographically approved

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