| Literature DB >> 2527805 |
L Flores-Romo1, J A Cairns, M J Millsum, J Gordon.
Abstract
U937 monocytic cells were found to respond by diminished spontaneous migration when confronted with affinity-purified soluble fragments of the low-affinity receptor for IgE (FcER2/CD23). Unlike B lymphoma cells, U937 cells could not be activated to respond with enhanced DNA synthesis through their membrane-bound CD23 antigen by MHM6, a monoclonal antibody within the CD23 cluster. MHM6 did, however, effectively neutralize the U937-directed MIF (migration inhibition factor) activity contained within the soluble CD23 preparations. The findings not only suggest a role for soluble CD23 as a novel cytokine at sites of inflammation but also indicate different functions for the membrane-bound forms expressed on B cells and monocytes.Entities:
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Year: 1989 PMID: 2527805 PMCID: PMC1385331
Source DB: PubMed Journal: Immunology ISSN: 0019-2805 Impact factor: 7.397