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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Leukemia
2015 ; 29
(6
): 1366-78
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HIF-1? is required for hematopoietic stem cell mobilization and 4-prolyl
hydroxylase inhibitors enhance mobilization by stabilizing HIF-1?
#MMPMID25578474
Forristal CE
; Nowlan B
; Jacobsen RN
; Barbier V
; Walkinshaw G
; Walkley CR
; Winkler IG
; Levesque JP
Leukemia
2015[Jun]; 29
(6
): 1366-78
PMID25578474
show ga
Many patients with hematological neoplasms fail to mobilize sufficient numbers of
hematopoietic stem cells (HSCs) in response to granulocyte colony-stimulating
factor (G-CSF) precluding subsequent autologous HSC transplantation. Plerixafor,
a specific antagonist of the chemokine receptor CXCR4, can rescue some but not
all patients who failed to mobilize with G-CSF alone. These refractory poor
mobilizers cannot currently benefit from autologous transplantation. To discover
alternative targetable pathways to enhance HSC mobilization, we studied the role
of hypoxia-inducible factor-1? (HIF-1?) and the effect of HIF-1? pharmacological
stabilization on HSC mobilization in mice. We demonstrate in mice with
HSC-specific conditional deletion of the Hif1a gene that the oxygen-labile
transcription factor HIF-1? is essential for HSC mobilization in response to
G-CSF and Plerixafor. Conversely, pharmacological stabilization of HIF-1? with
the 4-prolyl hydroxylase inhibitor FG-4497 synergizes with G-CSF and Plerixafor
increasing mobilization of reconstituting HSCs 20-fold compared with G-CSF plus
Plerixafor, currently the most potent mobilizing combination used in the clinic.