B-cell precursor (BCP) leukemia is the most common form of childhood cancer and represents one of the most radiation-resistant forms of human malignancy. In this study, we examined the antileukemic efficacy of the B43 (anti-CD19)-pokeweed antiviral protein (B43-PAP) immunotoxin against radiation-resistant BCP leukemia cells. B43-PAP caused apoptosis of radiation-resistant primary BCP leukemia cells, killed greater than 99% of radiation-resistant primary leukemic progenitor cells from BCP leukemia patients, and conferred extended survival to severe combined immunodeficiency (SCID) mice xenografted with radiation- resistant human BCP leukemia. Furthermore, the combination of B43-PAP and total body irradiation (TBI) was more effective than TBI alone in two SCID mouse bone marrow transplantation models of radiation- resistant human BCP leukemia. Thus, B43-PAP may prove useful in the treatment of radiation-resistant BCP leukemia.
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December 1, 1995
In vitro and in vivo antileukemic activity of B43-pokeweed antiviral protein against radiation-resistant human B-cell precursor leukemia cells
KG Waddick,
KG Waddick
Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Health Sciences Center, Minneapolis 55113, USA.
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DE Myers,
DE Myers
Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Health Sciences Center, Minneapolis 55113, USA.
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R Gunther,
R Gunther
Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Health Sciences Center, Minneapolis 55113, USA.
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LM Chelstrom,
LM Chelstrom
Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Health Sciences Center, Minneapolis 55113, USA.
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M Chandan-Langlie,
M Chandan-Langlie
Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Health Sciences Center, Minneapolis 55113, USA.
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JD Irvin,
JD Irvin
Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Health Sciences Center, Minneapolis 55113, USA.
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N Tumer,
N Tumer
Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Health Sciences Center, Minneapolis 55113, USA.
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FM Uckun
FM Uckun
Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Health Sciences Center, Minneapolis 55113, USA.
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Blood (1995) 86 (11): 4228–4233.
Citation
KG Waddick, DE Myers, R Gunther, LM Chelstrom, M Chandan-Langlie, JD Irvin, N Tumer, FM Uckun; In vitro and in vivo antileukemic activity of B43-pokeweed antiviral protein against radiation-resistant human B-cell precursor leukemia cells. Blood 1995; 86 (11): 4228–4233. doi: https://doi.org/10.1182/blood.V86.11.4228.bloodjournal86114228
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December 1 1995
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