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Conference Coverage (Vancouver AIDS Conference)

Immunotoxin Knocks Out KS

Published in Cancer Weekly, August 26th, 1996

AIDS-associated Kaposi's sarcoma (KS) cells have an Achilles heel.

Researchers have found that KS cells express extremely high levels of the interleukin 13 (IL-13) receptor.

Taking advantage of this finding, they created an immunotoxin that combines IL-13 with the cytopathic moiety of Pseudomonas endotoxin. This toxin selectively kills KS cells in vitro.

"IL-13 receptors on AIDS-KS tumors represent a novel plasma membrane protein for targeting with a potent cytotoxic agent such as Pseudomonas toxin-based chimeric protein," said Syed R. Husain of the U.S. Food and Drug Administration (FDA) Center for Biologics...

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