Selective toxicity of amino-terminal modified rnase a...

Chemistry: molecular biology and microbiology – Enzyme – proenzyme; compositions thereof; process for... – Hydrolase

Reexamination Certificate

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C435S195000, C435S091500, C435S023000, C435S069700, C424S094610, C424S183100, C530S350000, C530S391700, C536S023200

Reexamination Certificate

active

07029899

ABSTRACT:
This invention provides RNase A superfamily polypeptides with modified amino terminal which can be used to selectively kill target Kaposi's sarcoma cells, neoplastic endothelial cells, and non-neoplastic endothelial cells. In certain embodiments of the invention, the amino terminal modification consists of an addition of 4 amino acid sequence consisting of the SLHV sequence at position −4 to −1 to the eosinophil derived neurotoxin protein. The amino terminal addition is capable of directing the claimed RNase A superfamily polypeptides to proliferating endothelial cells, such as Kaposi's sarcoma cells, and selectively killing these cells.

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