Effects of SCM-LIF on the proliferative potential of human fetal BM CD34⁺ thy-1⁺ cells in vitro.

Stromal-based cultures in the presence of cytokine cocktail (10 ng/mL of each cytokine), including IL-3, IL-6, GM-CSF, and SCF, were used as controls. Positive control and negative control are cultures with or without exogenous LIF (10 ng/mL), respectively. Data are presented as the total number of hematopoietic cells per well (total of 10 wells) in each culture condition for 3-week cultures. Results are expressed as the mean ± SD.