Ricin-like toxins for treatment of cancer

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector

Reexamination Certificate

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C424S192100

Reexamination Certificate

active

11414227

ABSTRACT:
The present invention provides a protein having chain of a ricin-like toxin, a B chain of a ricin-like toxin and a novel heterologous linker amino acid sequence, linking the A and B chains. The linker sequence contains a cleavage recognition site for a specific protease such as those found in inflammatory cells and cancer cells. The invention also relates to a nucleic acid molecule encoding the protein and to expression vectors incorporating the nucleic acid molecule. Also provided is a method of inhibiting or destroying cells having a specific protease, such as cancer cells or inflammatory cells utilizing the nucleic acid molecules and proteins of the invention and pharmaceutical compositions for treating human inflammation and cancer.

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