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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 J+Leukoc+Biol
2015 ; 97
(3
): 611-9
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Visualization of bone marrow monocyte mobilization using Cx3cr1gfp/+Flt3L-/-
reporter mouse by multiphoton intravital microscopy
#MMPMID25516753
Evrard M
; Chong SZ
; Devi S
; Chew WK
; Lee B
; Poidinger M
; Ginhoux F
; Tan SM
; Ng LG
J Leukoc Biol
2015[Mar]; 97
(3
): 611-9
PMID25516753
show ga
Monocytes are innate immune cells that play critical roles in inflammation and
immune defense. A better comprehension of how monocytes are mobilized and
recruited is fundamental to understand their biologic role in disease and steady
state. The BM represents a major "checkpoint" for monocyte homeostasis, as it is
the primary site for their production and release. Our study determined that the
Cx3cr1(gfp/+) mouse strain is currently the most ideal model for the
visualization of monocyte behavior in the BM by multiphoton intravital
microscopy. However, we observed that DCs are also labeled with high levels of
GFP and thus, interfere with the accuracy of monocyte tracking in vivo. Hence, we
generated a Cx3cr1(gfp/+)Flt3L(-/-) reporter mouse and showed that whereas
monocyte numbers were not affected, DC numbers were reduced significantly, as DCs
but not monocytes depend on Flt3 signaling for their development. We thus
verified that mobilization of monocytes from the BM in Cx3cr1(gfp/+)Flt3L(-/-)
mice is intact in response to LPS. Collectively, our study demonstrates that the
Cx3cr1(gfp/+)Flt3L(-/-) reporter mouse model represents a powerful tool to
visualize monocyte activities in BM and illustrates the potential of a
Cx3cr1(gfp/+)-based, multifunctionality fluorescence reporter approach to dissect
monocyte function in vivo.