OBJECTIVETo investigate the impact of the mobilization with the antagonist of the stromal cell-derived factor receptor CXCR4 (AMD3100) (plerixafor), granulocyte-colony-stimulating factor (G-CSF) alone and in combination on the proliferation and cytotoxic functions of the murine splenic lymphocytes.

METHODSC57BL/6(H-2(b)) mice, as donors, were mobilized by, AMD3100, G-CSF alone or in combination (n = 10 mice in each group), and phosphate buffered saline (PBS). Then, the proliferation capacity of murine lymphocytes either in response to the phytohemagglutinin (PHA) stimulation or the mixed lymphocytes reaction (MLR) with allo-lymphocytes from the BALB/C(H-2(d)) mice were detected by CCK-8 method. The cytotoxic capacity of murine lymphocytes on Yac-1 tumor cells was examined by LDH assay.

RESULTSThe proliferation capacity and the responsiveness to alloantigen of the lymphocytes derived from the mice spleen mobilized by AMD3100, G-CSF alone or in combination were significantly lower than those by PBS control (P < 0.05), and those combination of AMD 3100 and G-CSF group were significantly lower than in other groups(P < 0.05). At the effector-target ration of 40:1, the cytotoxic capacity of murine lymphocytes in above mobilization groups was lower than in control group, but no statistically significant difference (P > 0.05).

CONCLUSIONBoth the proliferation capacity and the responsiveness to alloantigen of the murine lymphocytes decreases significantly after the mobilization with AMD3100, G-CSF alone or in combination, whereas no significant alternations are demonstrated on the cytotoxic capacity of murine lymphocytes. Further studies are needed to clarify the underlying mechanisms.