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Medline ® Abstract for Reference 118

of 'Treatment of relapsed or refractory chronic lymphocytic leukemia'

Alemtuzumab is an effective therapy for chronic lymphocytic leukemia with p53 mutations and deletions.
Lozanski G, Heerema NA, Flinn IW, Smith L, Harbison J, Webb J, Moran M, Lucas M, Lin T, Hackbarth ML, Proffitt JH, Lucas D, Grever MR, Byrd JC
Blood. 2004;103(9):3278. Epub 2004 Jan 15.
The presence of p53 mutation or deletion predicts for poor response to conventional therapy in chronic lymphocytic leukemia (CLL). We sought to determine whether the humanized anti-CD52 antibody alemtuzumab was effective in this patient group. Thirty-six patients with fludarabine-refractory CLL were treated with alemtuzumab, 15 (42%) of whom had p53 mutations or deletions. Clinical responses in patients with p53 mutations, deletions, or both were noted in 6 (40%) of 15 versus 4 (19%) of 21 of patients without. The median response duration for this subset of patients was 8 months (range, 3-17 months). These data suggest that alemtuzumab may be an effective therapy for patients with CLL with p53 mutations or deletions.
Department of Pathology, Ohio State University, Columbus, OH 43210, USA.