A comprehensive surface proteome analysis of myeloid leukemia cell lines for therapeutic antibody development

  • Strassberger V
  • Gutbrodt K
  • Krall N
 et al. 
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A detailed characterization of the cell surface proteome facilitates the identification of target antigens, which can be used for the development of antibody-based therapeutics for the treatment of hematological malignancies. We have performed cell surface biotinylation of five human myeloid leukemia cell lines and normal human granulocytes, which was used for mass spectrometric analysis and allowed the identification and label-free, relative quantification of 320 membrane proteins. Several proteins exhibited a pronounced difference in expression between leukemia cell lines and granulocytes. We focused our attention on CD166/ALCAM, as this protein was strongly up-regulated on all AML cell lines and AML blasts of some patients. A human monoclonal antibody specific to CD166 (named H8) was generated using phage display technology. H8 specifically recognized AML cells in FACS analysis while demonstrating tumor targeting properties in vivo. After in vitro screening of five potent cytotoxic agents, a duocarmycin derivative was used for the preparation of an antibody-drug conjugate, which was able to kill AML cells in vitro with an IC50of 8nM. The presented atlas of surface proteins in myeloid leukemia provides an experimental basis for the choice of target antigens, which may be used for the development of anti-AML therapeutic antibodies. © 2014 Elsevier B.V.

Author-supplied keywords

  • Activated-leukocyte cell adhesion molecule
  • Acute myeloid leukemia
  • Antibody-drug conjugates
  • Biotinylation
  • Cell surface antigens
  • Proteomics

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