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Mobilization kinetics of CD34+ cells in association with modulation of CD44 and CD31 expression during continuous intravenous administration of G- CSF in normal donors

Title
Mobilization kinetics of CD34+ cells in association with modulation of CD44 and CD31 expression during continuous intravenous administration of G- CSF in normal donors
Authors
Lee S.Im S.-A.Yoo E.-S.Nam E.-M.Lee M.-A.Ahn J.-Y.Huh J.-W.Kim D.-Y.Lee S.-N.Kim M.-J.Lee S.-J.Chung W.-S.Seong C.-M.
Ewha Authors
이승주이순남이미애정화순성주명유은선허정원남은미
SCOPUS Author ID
이승주scopusscopus; 이순남scopus; 이미애scopus; 정화순scopus; 성주명scopus; 유은선scopus; 허정원scopus; 남은미scopus
Issue Date
2000
Journal Title
Stem Cells
ISSN
1066-5099JCR Link
Citation
vol. 18, no. 4, pp. 281 - 286
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The aim of the present study is to evaluate the kinetics of CD34+ cells and investigate the potential modulation of CD44 and CD31 expression on CD34+ cells during continuous i.v. administration of G-CSF, thus to elucidate the possible mechanism of peripheral blood progenitor cell (PBPC) mobilization. Fifteen healthy donors were enrolled in this study. G-CSF (103 μg/kg/day) was administered for four consecutive days through continuous 24- h i.v. infusion. For measurement of complete blood counts, CD34+ cell levels and their expression of CD44 and CD31, PB sampling was performed immediately before the administration of G-CSF (steady-state) and after 4, 8, 24, 48, 72, 96, and 120 h of G-CSF administration. The percentage and absolute number of CD34+ cells significantly increased at day 3 (0.55 ± 0.09%, 51.12 ± 24.83 x 103/ml) and day 4 (0.47 ± 0.09%, 46.66 ± 24.93 x 103/ml), compared to the steady-state level (0.06 ± 0.09%, 2.03 ± 5.69 x 103/ml). At day 3 to day 5 following the onset of G-CSF administration, a strong decrease of CD44 and CD31 expression was observed on mobilized CD34+ cells compared to controls: the relative fluorescence intensity of CD44 and CD31 was, respectively, 50%-70% and 40%-90% lower than that of controls. We conclude that continuous i.v. administration of G-CSF apparently results in more rapid mobilization of CD34+ cells, and downregulation of CD44 and CD31 on CD34+ cells is likely to be involved in the mobilization of PBPC after treatment with G-CSF.
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의학전문대학원 > 의학과 > Journal papers
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