Basal CD34+ Cell Count Predicts Peripheral Blood Hematopoietic Progenitor Cells Mobilization in Healthy Donors after Administration of G-CSF

Abstract

BACKGROUND: Peripheral blood (PB) hematopoietic progenitor cells (HPC) mobilized with G-CSF are the first-choice source for allogeneic stem cell transplantation. We carried out a prospective study on healthy donors (HDs), to identify donor characteristics that could influence the effectiveness of mobilization. STUDY DESIGN AND METHODS: PB-HPC allogeneic donations from sibling HDs were analyzed. We tested somatic variables (sex, age, weight, height, volemia) and blood counts (WBC, platelets, hemoglobin, CD34+ cell count). Two different determinations of CD34+ cells were done in each HD: baseline (before G-CSF administration) and in PB on the morning of the fifth day (after G-CSF administration). HDs received G-CSF subcutaneously at a dose of 10 µg/kg per day. RESULTS: 128 consecutive HDs (66 males) with a median age of 43 years were enrolled. The mean value of CD34+ on day 5 was 90.8 cells/µL, 84.2 cells/µL in females and 97.2 cells/µL in males. The median values of CD34+ on day 5 were 75.5 cells/µL for the overall sample, 74 cells/µL in females and 80 cells/µL in males. On univariate correlation analysis, donor weight r=0.19, P<0.05, height (r=0.20, P<0.05), volemia (r=0.18, P<0.05) and baseline CD34+ (r=0.38, P<0.001) were significant predictors of CD34+ on day 5. Data analysis by gender showed that CD34+ on day 5 were predicted by age (r=-0.30, P<0.05), baseline WBC (r=0.25, P<0.05), baseline CD34+ (r=0.31, P<0.05) in males and by baseline CD34+ (r=0.45, P<0.001) in females. We performed two multivariate analyses either by using ordinary regression (to predict the mean value of CD34+ on day 5) or median regression (to predict the median value of CD34+ on day 5) according to the values of CD34+ at baseline (see table) in the whole study population and separately in females. These results indicate that in the whole study population and by using ordinary regression, a baseline value of CD34+ ranging from 0.5 to 2 cells/µL predicts a mean CD34+ value of 75.7 cells/µL at 5 days whereas a baseline value of CD34+ ≥3 cells/µL predicts a mean CD34+ value of 107.5 cells/µL at 5 days. Furthermore, in the whole study population but by using the median regression, a baseline value of CD34+ ranging from 0.5 to 2 cells/µL predicts a median CD34 + value of 64.6 cells/µL on day 5 whereas a baseline value of CD34+≥3 predicts a median CD34 value of 101.1 cells/µL on day 5. CONCLUSIONS: Baseline, HDs PB CD34+ cell counts correlated with the effectiveness of allogeneic HPC mobilization and could be useful to plan the collection. Disclosures No relevant conflicts of interest to declare.

Common Yoga Protocol Increases Peripheral Blood CD34+ Cells: An Open-Label Single-Arm Exploratory Trial

“…55,56 CD34+ cell population was consistent with previous studies, which shows that the detection technique and enumeration method followed were similar to other studies. 57 A significant increase in the total CD34+ population in peripheral blood after 3 months of CYP practice shows an enhancement in the cells regenerative potential and angiogenesis. 36,58 Also, a decrease in CD34+ cells represent a marker of aging; we found the enhancement in CD34+ cells, which depicts a curtailed cellular aging.…”