Abstract
A novel assay is described which allows the entrapment and detection of the immunoglobulin secreted from individual viable hybridoma cells using a secretion capture and reporter web (SCRW). By encapsulating the cells in agarose microdroplets which have been derivatized to create a fluorescent antigen-specific sandwich assay, flow cytometry can be used to identify and sort productive cells from a heterogeneous population. Using agarase, the cells can be recovered from the microdroplets and clonally expanded after selection. The assay has been used to reclone rare secretors from hybridoma cultures and to enhance the production of cultures with poor producers. The assay is easily generalized for the detection of any secreted protein for which specific antibodies or other ligands are available.
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