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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 Nat+Commun
2018 ; 9
(1
): 2746
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Intravital imaging-based analysis tools for vessel identification and assessment
of concurrent dynamic vascular events
#MMPMID30013228
Honkura N
; Richards M
; Laviña B
; Sáinz-Jaspeado M
; Betsholtz C
; Claesson-Welsh L
Nat Commun
2018[Jul]; 9
(1
): 2746
PMID30013228
show ga
The vasculature undergoes changes in diameter, permeability and blood flow in
response to specific stimuli. The dynamics and interdependence of these responses
in different vessels are largely unknown. Here we report a non-invasive technique
to study dynamic events in different vessel categories by multi-photon microscopy
and an image analysis tool, RVDM (relative velocity, direction, and morphology)
allowing the identification of vessel categories by their red blood cell (RBC)
parameters. Moreover, Claudin5 promoter-driven green fluorescent protein (GFP)
expression is used to distinguish capillary subtypes. Intradermal injection of
vascular endothelial growth factor A (VEGFA) is shown to induce leakage of
circulating dextran, with vessel-type-dependent kinetics, from capillaries and
venules devoid of GFP expression. VEGFA-induced leakage in capillaries coincides
with vessel dilation and reduced flow velocity. Thus, intravital imaging of
non-invasive stimulation combined with RVDM analysis allows for recording and
quantification of very rapid events in the vasculature.