sobrecarga e quelação de ferro na anemia falciforme iron overload and iron chelation in sickle cell disease

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ID: 210226
2007
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Ranked #20 of 100 articles by views in journal of computational and graphical statistics : a joint publication of american statistical association, institute of mathematical statistics, interface foundation of north america

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Abstract
Pacientes cronicamente transfundidos desenvolvem sobrecarga de ferro que ocasiona lesão orgânica e morte. Nos últimos trinta anos, pacientes com sobrecarga de ferro transfusional dependem de infusões noturnas de desferroxamina para quelação de ferro. Apesar da dramática melhora da expectativa de vida na era da desferroxamina para pacientes com anemias dependentes de transfusão, 50% dos pacientes com talassemia maior morrem antes dos 30 anos de idade, predominantemente devido à insuficiência cardíaca induzida pelo ferro. A difícil natureza desse tratamento com infusão subcutânea prolongada por meio de aparelho infusor portátil motivou o desenvolvimento de formas alternativas de tratamento que facilitasse a aderência do paciente. Estratégias para reduzir a sobrecarga de ferro e suas conseqüências, através da melhora dos regimes de quelação, foram as prioridades mais importantes nos últimos anos. Nesta revisão, descrevemos os avanços mais importantes da terapia quelante de ferro. Em particular, analisamos os dois quelantes de ferro ativos por via oral: deferiprona e o novo quelante de ferro oral deferasirox.
Patients who are chronically dependent on transfusions will develop iron overload that leads to organ damage and eventually to death. For nearly 30 years, patients with transfusional iron overload have been subject to overnight deferoxamine infusions for iron chelation. Despite dramatic gains in terms of life expectancy in the deferoxamine era for patients with transfusion-dependent anemias, 50% of patients with thalassemia major die before the age of 35 years, predominantly due to iron-induced heart failure. The very demanding nature of this treatment with prolonged subcutaneous infusion via portable pump infusions has been the motivation for attempts to develop alternative forms of treatment that would facilitate the patients' compliance. Strategies to reduce iron overload and its consequences by improving chelation regimens have been of the highest priority in the last years.In this review, the most important advances in iron-chelating therapy are described, particularly the analysis of the two orally active iron chelators: deferiprone and the novel oral chelator deferasirox.
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Authors ;Rodolfo D. Cançado
Journal journal of computational and graphical statistics : a joint publication of american statistical association, institute of mathematical statistics, interface foundation of north america
Year 2007
DOI
10.1590/S1516-84842007000300025
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-84842007000300025
Keywords
iron overload iron chelation deferiprone

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