Fig. 3.

Proinflammatory cytokine secretion by CD34⁺ cells or their cultured cells infected with E. coli. CD34⁺ cells (day 0, a) or their cultured cells [day 7 (b) and 14 (c)] in six-well plates were incubated with E. coli for 18 h and protein levels of each cytokine were determined by ELISA. Data are the mean ± s.e.m. of seven separate experiments. White bar, E. coli-infected; black bar, non-infected controls.