J chain polypeptide targeting molecule linked to an imaging agent

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United States of America Patent

PATENT NO 6045774
SERIAL NO

08782480

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Targeting molecules for use in delivering imaging agents to epithelial tissue are disclosed. Upon delivery, the imaging agent(s) may remain within an epithelial cell or may undergo transepithelial transport via transcytosis. The targeting molecules may be used, for example, for diagnostic techniques. The targeting molecule is a polypeptide, which may be produced by recombinant methods, that forms a closed covalent loop, contains at least three peptide domains having .beta.-sheet character which are separated by domains lacking .beta.-sheet character, specifically binds to a basolateral factor attached to a basolateral domain of an epithelial surface causing uptake of a linked imaging agent into cells of the epithelial surface, and is not a full length dimeric Iga. Preferably, the polypeptide is a J chain polypeptide, or a J chain polypeptide linked to an immunoglobulin heavy chain without an immunoglobulin light chain.

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Patent Owner(s)

Patent OwnerAddress
PLANTIBODIES CORPORATION158 CREDLE STREET PITTSBORO NC 27312

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fitchen, John H La Jolla, CA 11 97
Hein, Mich B Fallbrook, CA 23 754
Hiatt, Andrew C San Diego, CA 28 1610

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