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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
- 이승주; 이순남; 이미애; 정화순; 성주명; 유은선; 허정원; 남은미
- SCOPUS Author ID
- 이승주; 이순남; 이미애; 정화순; 성주명; 유은선; 허정원; 남은미
- Issue Date
- 2000
- Journal Title
- Stem Cells
- ISSN
- 1066-5099
- Citation
- Stem Cells vol. 18, no. 4, pp. 281 - 286
- Indexed
- SCI; SCIE; SCOPUS
- Document Type
- Article
- 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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- 의과대학 > 의학과 > Journal papers
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