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2017 ; 7
(1
): 9049
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Dynamic, heterogeneous endothelial Tie2 expression and capillary blood flow
during microvascular remodeling
#MMPMID28831080
Kelly-Goss MR
; Ning B
; Bruce AC
; Tavakol DN
; Yi D
; Hu S
; Yates PA
; Peirce SM
Sci Rep
2017[Aug]; 7
(1
): 9049
PMID28831080
show ga
Microvascular endothelial cell heterogeneity and its relationship to hemodynamics
remains poorly understood due to a lack of sufficient methods to examine these
parameters in vivo at high resolution throughout an angiogenic network. The
availability of surrogate markers for functional vascular proteins, such as green
fluorescent protein, enables expression in individual cells to be followed over
time using confocal microscopy, while photoacoustic microscopy enables dynamic
measurement of blood flow across the network with capillary-level resolution. We
combined these two non-invasive imaging modalities in order to spatially and
temporally analyze biochemical and biomechanical drivers of angiogenesis in
murine corneal neovessels. By stimulating corneal angiogenesis with an alkali
burn in Tie2-GFP fluorescent-reporter mice, we evaluated how onset of blood flow
and surgically-altered blood flow affects Tie2-GFP expression. Our study
establishes a novel platform for analyzing heterogeneous blood flow and
fluorescent reporter protein expression across a dynamic microvascular network in
an adult mammal.