C. Voermans et al., In vitro migratory capacity of CD34(+) cells is related to hematopoietic recovery after autologous stem cell transplantation, BLOOD, 97(3), 2001, pp. 799-804
To investigate whether the migratory ability of peripheral blood-derived CD
34(+) cells of patients undergoing autologous peripheral blood stem cell tr
ansplantation is related to the homing efficiency of these cells, the migra
tion in vitro of these cells was determined and correlated with in vivo hem
atopoietic recovery. Large interindividual differences of the in vitro migr
atory ability of the CD34(+) cells were observed, ranging from 1.1% to 16.4
% for spontaneous migration and 6.2% to 40.8% for SDF-1-induced (100 ng/mL)
migration. Significantly faster hematologic recovery was observed in those
patients who received transplanted CD34(+) cells that showed high spontane
ous and SDF-1-induced migration in vitro (P < .05), Moreover, CD34(+) cells
from healthy G-CSF-mobilized donors exhibited significantly higher spontan
eous and SDF-1-induced (P < .01) migration than CD34(+) cells from patients
mobilized with chemotherapy and G-CSF. The lower migratory capacity in vit
ro of patient-derived CD34(+) cells was not due to lower expression of CXCR
-4 but probably reflected decreased motogenic behavior of the cells. These
results indicate that the migratory capacity of the cells is important for
hematopoietic recovery. The data suggest that the engraftment potential of
autologous stem cells is more or less impaired by treatment before or durin
g the mobilization procedure and might possibly be restored by in vitro man
ipulation of the cells. In addition, an exponential relation between CXCR-4
expression and number of CD34(+) cells that mobilized to the peripheral bl
ood was found (P < .001), suggesting that CXCR-4 expression plays a role in
the mobilization of CD34(+) cells. (C) 2001 by The American Society of Hem
atology.