Figure 5

Inhibition of CD3⁺ T-cell proliferation in the presence of HPB-AML-I cells. Mixed lymphocyte culture was performed in the presence or absence of HPB-AML-I cells (white columns). For control, similar experiments were performed with UCBTERT-21 cells (black columns). Results are presented as the XTT absorbance levels at 450 nm, which were normalized to those of the baseline experiments (cell culture in the absence of HPB-AML-I or UCBTERT-21 cells). Means and standard deviations of four independent experiments are shown. *, P < 0.05; **, P < 0.01 compared to the baseline results