Table 1.

Expression of monocyte-differentiation antigens on U937 cells before and after treatment with transforming growth factor-β₁ and 1,25-(OH)₂ vitamin D₃ (TGF-β₁/D₃)

	Mean fluorescence intensities
	Control	TGF-β1/D3
Background (FITC)	3·0 ± 0·4	3·2 ± 0·8
IgG	2·7 ± 0·2	2·9 ± 0·3
CD11c	5·3 ± 0·2	6·6 ± 0·2*
CD14	3·0 ± 0·2	15·5 ± 2·0*
CD11b	13·5 ± 0·8	101·3 ± 12·4*
CD18	115·9 ± 3·3	296·7 ± 11·4*

^*P < 0·05 compared with control U937 cells.

Each value represents mean ± SEM of three to four experiments. The mean fluorescence value of the cell population was determined by measuring the fluorescence intensity of 10 000 cells.

FITC, fluorescein isothiocyanate.