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research article

Lymphatic vasculature mediates macrophage reverse cholesterol transport in mice

Martel, Catherine
•
Li, Wenjun
•
Fulp, Brian
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2013
The Journal of clinical investigation

Reverse cholesterol transport (RCT) refers to the mobilization of cholesterol on HDL particles (HDL-C) from extravascular tissues to plasma, ultimately for fecal excretion. Little is known about how HDL-C leaves peripheral tissues to reach plasma. We first used 2 models of disrupted lymphatic drainage from skin - 1 surgical and the other genetic - to quantitatively track RCT following injection of [H-3]-cholesterol-loaded macrophages upstream of blocked or absent lymphatic vessels. Macrophage RCT was markedly impaired in both models, even at sites with a leaky vasculature. Inhibited RCT was downstream of cholesterol efflux from macrophages, since macrophage efflux of a fluorescent cholesterol analog (BODIPY-cholesterol) was not altered by impaired lymphatic drainage. We next addressed whether RCT was mediated by lymphatic vessels from the aortic wall by loading the aortae of donor atherosclerotic Apoe-deficient mice with H-2-labeled cholesterol and surgically transplanting these aortae into recipient Apoe-deficient mice that were treated with anti-VEGFR3 antibody to block lymphatic regrowth or with control antibody to allow such regrowth. [H-2]-Cholesterol was retained in aortae of anti-VEGFR3-treated mice. Thus, the lymphatic vessel route is critical for RCT from multiple tissues, including the aortic wall. These results suggest that supporting lymphatic transport function may facilitate cholesterol clearance in therapies aimed at reversing atherosclerosis.

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Type
research article
DOI
10.1172/Jci63685
Web of Science ID

WOS:000317021800019

Author(s)
Martel, Catherine
Li, Wenjun
Fulp, Brian
Platt, Andrew M.
Gautier, Emmanuel L.
Westerterp, Marit
Bittman, Robert
Tall, Alan R.
Chen, Shu-Hsia
Thomas, Michael J.
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Date Issued

2013

Publisher

American Society for Clinical Investigation

Published in
The Journal of clinical investigation
Volume

123

Issue

4

Start page

1571

End page

1579

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LLCB  
Available on Infoscience
May 13, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/92140
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