Fig. 3From: Role of IgE Immune Complexes in the Regulation of HIV-1 Replication and Increased Cell Death of Infected U1 Monocytes: Involvement of CD23/FcεRII-Mediated Nitric Oxide and Cyclic AMP Pathways Induction of CD23 expression on UI low cells by IL-4 Cells were incubated (105/ml) for 48 hr in the presence of 10 ng/ml IL-4. They were then washed and assayed for their reactivity with FITC-CD23-mAb and isotype-matched control (FITC-CD19-mAb).Back to article page