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2016 ; 5
(2
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
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English Wikipedia
Direct visualization of the phenotype of hypoxic tumor cells at single cell
resolution in vivo using a new hypoxia probe
#MMPMID27790387
Wang Y
; Wang H
; Li J
; Entenberg D
; Xue A
; Wang W
; Condeelis J
Intravital
2016[]; 5
(2
): ä PMID27790387
show ga
Tumor hypoxia is linked to tumor progression, metastasis, and therapy resistance.
However, the underlying mechanisms behind this linkage are not fully understood.
Here we present a novel fluorescent mCherry hypoxia-responsive marker that can be
used in real time imaging to specifically and sensitively identify hypoxic cells
in vivo at single cell resolution. Tumors derived from triple negative tumor
cells expressing the hypoxia marker reveal that the hypoxic tumor cells
congregate near flowing blood vessels. Using multiphoton microscopy, hypoxic
MDA-MB-231 cells were directly visualized and showed a more persistent slow
migration phenotype as compared to normoxic cells in the same field in vivo.
Hypoxic tumor cells are enriched in the cell population that migrates toward
human epithelial growth factor gradients in vivo, and has increased collagen
degradation and intravasation activity, characteristics of dissemination and
metastasis competent tumor cells. The hypoxia probe introduced in this study
provides a specific reporter of hypoxic cell phenotypes in vivo which reveals new
insights into the mechanisms by which hypoxia is linked to metastasis.