Methods for screening antibodies for use as immunotoxins

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United States of America Patent

PATENT NO 5045451
SERIAL NO

07262974

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present disclosure described an assay for screening monoclonal antibodies for their potential as highly cytotoxic immunotoxins. The assay involves treating cells with dilutions of the test antibody followed by a Fab fragment of a secondary antibody coupled to an A chain toxin ('indirect assay'). The cytotoxicity of the indirect assay is compared to that of the direct assay where the monoclonal antibody is coupled to an A chain toxin. Indirect and direct assays were carried out using 14 antibodies and a panel of 8 human and mouse cell types. The two assays showed virtually 100% correlation. The indirect assay, therefore, predicts the potency of a given monoclonal antibody to make an effective immunotoxin and should be useful in screening monoclonal antibodies for use as immunotoxins.

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Patent Owner(s)

Patent OwnerAddress
BOARD OF REGENTS UNIVERSITY OF TEXAS SYSTEM THE 201 WEST 7TH STREET AUSTIN TX 78701Not Provided

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Uhr, Jonathan W 12355 Montego Plz., Dallas, TX 75230 17 1393
Vitetta, Ellen S 6914 Pemberton Dr., Dallas, TX 75230 19 578

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