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2015 ; 350
(6263
): 985-90
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Patrolling monocytes control tumor metastasis to the lung
#MMPMID26494174
Hanna RN
; Cekic C
; Sag D
; Tacke R
; Thomas GD
; Nowyhed H
; Herrley E
; Rasquinha N
; McArdle S
; Wu R
; Peluso E
; Metzger D
; Ichinose H
; Shaked I
; Chodaczek G
; Biswas SK
; Hedrick CC
Science
2015[Nov]; 350
(6263
): 985-90
PMID26494174
show ga
The immune system plays an important role in regulating tumor growth and
metastasis. Classical monocytes promote tumorigenesis and cancer metastasis, but
how nonclassical "patrolling" monocytes (PMo) interact with tumors is unknown.
Here we show that PMo are enriched in the microvasculature of the lung and reduce
tumor metastasis to lung in multiple mouse metastatic tumor models.
Nr4a1-deficient mice, which specifically lack PMo, showed increased lung
metastasis in vivo. Transfer of Nr4a1-proficient PMo into Nr4a1-deficient mice
prevented tumor invasion in the lung. PMo established early interactions with
metastasizing tumor cells, scavenged tumor material from the lung vasculature,
and promoted natural killer cell recruitment and activation. Thus, PMo contribute
to cancer immunosurveillance and may be targets for cancer immunotherapy.