Drug – bio-affecting and body treating compositions – Immunoglobulin – antiserum – antibody – or antibody fragment,... – Binds antigen or epitope whose amino acid sequence is...
Reexamination Certificate
2008-07-29
2008-07-29
Belyavskyi, Michail A (Department: 1644)
Drug, bio-affecting and body treating compositions
Immunoglobulin, antiserum, antibody, or antibody fragment,...
Binds antigen or epitope whose amino acid sequence is...
C435S007100
Reexamination Certificate
active
07404954
ABSTRACT:
The invention provides compositions and methods for specific binding to a region of the polymeric immunoglobulin receptor (pIgR) of a cell with the provisos that the ligand does not substantially bind to the most abundant form of the secretory component (SC) of pIgR present in an organ of interest of an animal of interest under physiological conditions, and does not bind to the pIgR stalk. In some embodiments, the ligand decreases cleavage of SC from the stalk by at least one-third. The ligands and methods of the invention can be used with both birds and mammals. In more preferred embodiments, the animal is a mammal. In the most preferred embodiment, the animal is a human. The ligand may be targeted into the cell or may undergo retrograde transcytosis and release at the basolateral side of the cell, and may comprise a biologically active composition.
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Chapin Steven J.
Mostov Keith E.
Richman-Eisenstat Janice
Belyavskyi Michail A
The Regents of the University of California
Townsend and Townsend / and Crew LLP
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