Preferential expansion of immature thymocytes after rhSDF-1α treatment.

Absolute numbers of different thymocyte subsets from FTOC cultured in absence (white bars) or presence of rhSDF-1α (gray bars, 5 ng/mL; black bars, 10 ng/mL). The absolute numbers of each thymocyte subset were calculated by multiplying the percentage of the cell subsets by the total number of human cells. The bars represent the mean ± SD from 4 independent experiments.