Fucci-guided purification of hematopoietic stem cells with high repopulating activity.

Abstract:

:Fluorescent ubiquitination-based cell cycle indicator (Fucci) technology utilizing the cell cycle-dependent proteolysis of ubiquitin oscillators enables visualization of cell cycle progression in living cells. The Fucci probe consists of two chimeric fluorescent proteins, FucciS/G2/M and FucciG1, which label the nuclei of cells in S/G2/M phase green and those in G1 phase red, respectively. In this study, we generated Fucci transgenic mice and analyzed transgene expression in hematopoietic cells using flow cytometry. The FucciS/G2/M-#474 and FucciG1-#639 mouse lines exhibited high-level transgene expression in most hematopoietic cell populations. The FucciG1-#610 line expressed the transgene at high levels predominantly in the hematopoietic stem cell (HSC) population. Analysis of the HSC (CD34(-)KSL: CD34(-/low)c-Kit(+)Sca-1(+)lineage marker(-)) population in the transgenic mice expressing both FucciS/G2/M and FucciG1 (#474/#610) confirmed that more than 95% of the cells were in G0/G1 phase, although the FucciG1(red) intensity was heterogeneous. An in vivo competitive repopulation assay revealed that repopulating activity resided largely in the FucciG1(red)(high) fraction of CD34(-)KSL cells. Thus, the CD34(-)KSL HSC population can be further purified on the basis of the Fucci intensity.

authors

Yo M,Sakaue-Sawano A,Noda S,Miyawaki A,Miyoshi H

doi

10.1016/j.bbrc.2014.12.074

subject

Has Abstract

pub_date

2015-01-30 00:00:00

pages

7-11

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(14)02256-6

journal_volume

457

pub_type

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