*INSERM U196, Institut Curie, 26 rue d'Ulrn, 75321 Paris Cédex. France.
β2-Adrenoceptor stimulation augments the IL-4-induced CD23 expression and release and the expression of differentiation markers (CD14, CD18) by the human monocytic cell line, U 937
Article first published online: 28 JUN 2008
Clinical & Experimental Allergy
Volume 23, Issue 4, pages 317–325, April 1993
How to Cite
PAUL-EUGENE, N., DUGAS, B., GORDON, J., KOLB, J. P., CAIRNS, J. A., PAUBERT-BRAQUET, M., MENCIA-HUERTA, J. M. and BRAQUET, P. (1993), β2-Adrenoceptor stimulation augments the IL-4-induced CD23 expression and release and the expression of differentiation markers (CD14, CD18) by the human monocytic cell line, U 937. Clinical & Experimental Allergy, 23: 317–325. doi: 10.1111/j.1365-2222.1993.tb00329.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Submitted 29 June 1992; revised 30 October 1992; accepted 16 November 1992.
The effect of β2-adrenoceptor agonists and interleukin-4 (IL-4) on the CD23 expression on, and release from, the human promonocytic cell line, U 937, was investigated. As assessed by flow cytometry, incubation of U 937 cells in the presence of salbutamol, fenoterol or IL-4 induced a concentration- and time-dependent increase in CD23 expression, that was maximal after 48 hr and followed by a decrease thereafter. In addition, salbutamol potentiated the effect of IL-4, the optimal concentration of the drug being a function of the concentration of this cytokine. This synergy between IL-4 and β2-adrenoceptor agonists was also observed for the release of the soluble form of CD23. The effect on CD23 expression of salbutamol and fenoterol, but not of IL-4, was blocked in the Wesence of d, l-propranolol (1 μm) or butoxamine (1 μm). The α-adrenoceptor agonist, norepinephrine (1 μm), was ineffective in inducing CD23 expression or potentiating the one evoked by IL-4. Salbutamol down-regulated the expression of FcγRI (CD64) and Fc, RII (CD32) whereas IL-4 was ineffective. Only when added together at the onset of the culture did salbutamol and IL-4 induce, after 48 hr, the expression of the monocyte marker, CD 14. The expression of CD 18 was up-regulated in response to salbutamol either alone or in combination with IL-4, this cytokine alone being inefficient. These data suggest that IL-4 and β2-adrenoceptor agonists induce differentiation of U 937 cells into monocyte-like cells.