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Review
. 2006 Oct;20(5):1137-51, viii.
doi: 10.1016/j.hoc.2006.06.009.

Immunotoxins in the treatment of refractory hairy cell leukemia

Robert J Kreitman  1 , Ira Pastan
Affiliations
Review

Immunotoxins in the treatment of refractory hairy cell leukemia

Robert J Kreitman et al. Hematol Oncol Clin North Am. 2006 Oct.

Abstract

An increasing number of patients who have hairy cell leukemia (HCL) have persistent disease that requires treatment, despite purine analogs, splenectomy, interferon, and rituximab. Many of these patients have been treated successfully with immunotoxins. An immunotoxin contains a protein toxin connected to a cell-binding ligand, such as an antibody. An immunotoxin recognizes the target cell, internalizes, and the toxin translocates to the cytosol where it inhibits protein synthesis enzymatically. Immunotoxins that show activity in HCL contain truncated Psedomonas exotoxin fused to the Fv fragments of anti-CD25 or anti-CD22 monoclonal antibodies. Both agents, termed LMB-2 and BL22, respectively, have been tested in patients who have HCL after failure of purine analogs and other therapies; major responses have been achieved in most patients.

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