TY - JOUR
T1 - FRIL maintains quiescence of hematopoietic stem cells through regulation of cell cycle related factors
AU - Li, Jin
AU - Xie, Xiao yan
AU - Wang, Dong mei
AU - Pei, Xue tao
N1 - Copyright:
This record is sourced from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
PY - 2007/1
Y1 - 2007/1
N2 - OBJECTIVE: To explore the mechanism of Flt3 receptor-interacting lectin (FRIL) maintains quiescence of hematopoietic stem cells (HSCs) in vitro. METHODS: Cord blood CD34+ cells were cultured in suspension medium supplemented with or without FRIL and FL. Cells were collected at different time points and the expression of some cell cycle regulators, especially those involved in G0/G1 phase regulation were detected on mRNA and protein level. RESULTS: The expressions of G0/G1 phase related cyclins or CDKs were undetectable in the newly isolated CD34+ cells, expressions of Cyclin D3, CDK6 and P27 were the lowest in FRIL cultured group after 3d's culture (FRIL group: 483 +/- 63, 553 +/- 39, 0.312 +/- 0.030; FL group: 2437 +/- 52, 3209 +/- 98, 0.787 +/- 0.024; BLANK: 914 +/- 105, 1497 +/- 55, 0.616 +/- 0.029, respectively), but the expression of P53 was the highest in FRIL group (FRIL group: 4.476 +/- 0.159; FL group: 0.581 +/- 0.099, BLANK: 2.167 +/- 0.114). The expression of positive regulators of cell cycle in FRIL group were the same as that of FL group and blank group or lower. CONCLUSION: FRIL preserves HSCs effectively in vitro through the mechanisms of down-regulation of cyclin D3 and CDK6 and activation of P53. P27 is mostly involved in the differentiation of HSCs.
AB - OBJECTIVE: To explore the mechanism of Flt3 receptor-interacting lectin (FRIL) maintains quiescence of hematopoietic stem cells (HSCs) in vitro. METHODS: Cord blood CD34+ cells were cultured in suspension medium supplemented with or without FRIL and FL. Cells were collected at different time points and the expression of some cell cycle regulators, especially those involved in G0/G1 phase regulation were detected on mRNA and protein level. RESULTS: The expressions of G0/G1 phase related cyclins or CDKs were undetectable in the newly isolated CD34+ cells, expressions of Cyclin D3, CDK6 and P27 were the lowest in FRIL cultured group after 3d's culture (FRIL group: 483 +/- 63, 553 +/- 39, 0.312 +/- 0.030; FL group: 2437 +/- 52, 3209 +/- 98, 0.787 +/- 0.024; BLANK: 914 +/- 105, 1497 +/- 55, 0.616 +/- 0.029, respectively), but the expression of P53 was the highest in FRIL group (FRIL group: 4.476 +/- 0.159; FL group: 0.581 +/- 0.099, BLANK: 2.167 +/- 0.114). The expression of positive regulators of cell cycle in FRIL group were the same as that of FL group and blank group or lower. CONCLUSION: FRIL preserves HSCs effectively in vitro through the mechanisms of down-regulation of cyclin D3 and CDK6 and activation of P53. P27 is mostly involved in the differentiation of HSCs.
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M3 - Article
C2 - 17649725
AN - SCOPUS:70349564630
SN - 0253-2727
VL - 28
SP - 37
EP - 40
JO - Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi
JF - Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi
IS - 1
ER -