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Ibritumomab

Formule du tiuxétan rattaché à l'ibritumomab

L'ibritumomab ou ibritumomab tiuxétan, commercialisé sous le nom de Zevalin, est un anticorps monoclonal murin IgG1 kappa recombinant couplé à de l'yttrium 90, spécifique de l'antigène CD20 des lymphocytes B, utilisé dans la prise en charge des lymphomes folliculaires[1] et des lymphomes non hodgkiniens à cellules B CD20+[2].

Mécanisme d'action

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L'ibritumomab permet, grâce au radioisotope, de tuer les cellules cibles et les cellules cancéreuses à proximité grâce à un rayonnement ß ainsi que par le mécanisme de cytotoxicité à médiation cellulaire dépendante des anticorps. Ce mécanisme limite la prolifération des lymphocytes B[3].

Références

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  1. (en) Franck Morschhauser et al., « Phase III Trial of Consolidation Therapy With Yttrium-90–Ibritumomab Tiuxetan Compared With No Additional Therapy After First Remission in Advanced Follicular Lymphoma », Journal of Clinical Oncology, vol. 26, no 32,‎ , p. 5156-5164 (PMID 18854568, lire en ligne, consulté le ).
  2. (en) Thomas E. Witzig et al., « Randomized Controlled Trial of Yttrium-90–Labeled Ibritumomab Tiuxetan Radioimmunotherapy Versus Rituximab Immunotherapy for Patients With Relapsed or Refractory Low-Grade, Follicular, or Transformed B-Cell Non-Hodgkin’s Lymphoma », Journal of Clinical Oncology, vol. 20, no 10,‎ , p. 2453-2463 (PMID 12011122, DOI 10.1200/JCO.2002.11.076, lire en ligne, consulté le ).
  3. (en) « Zevalin », sur www.ema.europa.eu, Agence européenne des médicaments, (consulté le ).
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Ibritumomab
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