SYNTHETIC POLY-Ig RECEPTOR, RECEPTOR-ANTIBODY COMPLEXES, PRODUCTION AND USE THEREOF

摘要

Poly-Ig antibodies (particularly monoclonal IgA's) are complexed with a stabilizer protein derived from the poly-Ig receptor (partricularly a recombinant receptor-derived stabilizer protein), which includes at least one poly-Ig binding domain of the receptor, and substantially lacks any C-terminal transmembrane or intracellular poly-Ig receptor domains. The stabilized complex can be used as a passive vaccine administration to mucosal surfaces. Methods for in vivo screening of monoclonal poly-Ig are also disclosed. Methods of generating the complex using a monolayer of anchorage-denpendent epithelial cells engineered to make poly-Ig receptor are also disclosed. Hybridomas for manufacture of monoclonal IgA, are made by harvesting lymphoid cells from mucosal tissue (e.g. Peyer's patches) rich in such cells.