Systemic radioimmunotherapy using a monoclonal antibody, anti-Tac directed toward the alpha subunit of the IL-2 receptor armed with the α-emitting radionuclides 212Bi or 211At
2004
Abstract To exploit the fact that IL-2 receptors are expressed by T-cells responding to foreign antigens but not by resting T-cells, humanized anti-Tac (HAT) armed with alpha-emitting radionuclides 212 Bi and 211 At was evaluated in a cynomolgus cardiac allograft model. Control graft survival was 8.2± 0.5 days compared with 14.0±1.3 days (p 212 Bi labeled HAT and 26.7±2.4 days survival (p 211 At labeled HAT. Thus, 211 At labeled HAT may have application in organ transplantation and in treatment of IL-2 receptor expressing T-cell leukemia.
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