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NGF pretreatment promotes CD34+ cell migration by increasing CXCR-4 expression. (A) CD34+ cells were pretreated with NGF and then stimulated with SDF-1 in a modified Boyden chamber assay. (B) Flow cytometric analysis of CXCR-4 expression in CD34+ cells treated with NGF. Data are presented as mean ± SE (n = 4). Data analysis: one-way ANOVA and post hoc Bonferroni multiple comparisons. Asterisks indicate significant difference compared with corresponding control.
