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THSD1 preserves vascular integrity and protects against intraplaque haemorrhaging in ApoE-/- mice

  • Remco A Haasdijk
  • , Wijnand K Den Dekker
  • , Caroline Cheng
  • , Dennie Tempel
  • , Robert Szulcek
  • , Frank L Bos
  • , Dorien M A Hermkens
  • , Ihsan Chrifi
  • , Maarten M Brandt
  • , Chris Van Dijk
  • , Yan Juan Xu
  • , Esther H M Van De Kamp
  • , Lau A J Blonden
  • , Jan Van Bezu
  • , Judith C Sluimer
  • , Erik A L Biessen
  • , Geerten P Van Nieuw Amerongen
  • , Henricus J Duckers
  • Experimental Cardiology, Department of Cardiology, Thoraxcenter, Erasmus University Medical Center, Rotterdam, The Netherlands.
  • Department of Cardiology, Erasmus Medical Center Rotterdam, Rotterdam, The Netherlands Regenerative Vascular Medicine Laboratory, Department of Nephrology and Hypertension, Division of Internal Medicine and Dermatology, University Medical Center Utrecht, Heidelberglaan 100, PO Box 85500, 3584 CX Utrecht, 3508 GA Utrecht, The Netherlands.
  • Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
  • Department of Cardiology, Erasmus Medical Center Rotterdam, Rotterdam, The Netherlands Hubrecht Institute, Utrecht, The Netherlands.
  • Regenerative Vascular Medicine Laboratory, Department of Nephrology and Hypertension, Division of Internal Medicine and Dermatology, University Medical Center Utrecht, Heidelberglaan 100, PO Box 85500, 3584 CX Utrecht, 3508 GA Utrecht, The Netherlands.
  • Department of Physiology, Institute for Cardiovascular Research, VU University Medical Center, De Boelelaan 1118, Room 11W53, 1081 HV, Amsterdam, The Netherlands.
  • Department of Pathology, Maastricht University Medical Center, Maastricht, The Netherlands.
  • Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands [email protected].

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

AIMS: Impairment of the endothelial barrier leads to microvascular breakdown in cardiovascular disease and is involved in intraplaque haemorrhaging and the progression of advanced atherosclerotic lesions that are vulnerable to rupture. The exact mechanism that regulates vascular integrity requires further definition. Using a microarray screen for angiogenesis-associated genes during murine embryogenesis, we identified thrombospondin type I domain 1 (THSD1) as a new putative angiopotent factor with unknown biological function. We sought to characterize the role of THSD1 in endothelial cells during vascular development and cardiovascular disease.

METHODS AND RESULTS: Functional knockdown of Thsd1 in zebrafish embryos and in a murine retina vascularization model induced severe haemorrhaging without affecting neovascular growth. In human carotid endarterectomy specimens, THSD1 expression by endothelial cells was detected in advanced atherosclerotic lesions with intraplaque haemorrhaging, but was absent in stable lesions, implying involvement of THSD1 in neovascular bleeding. In vitro, stimulation with pro-atherogenic factors (3% O2 and TNFα) decreased THSD1 expression in human endothelial cells, whereas stimulation with an anti-atherogenic factor (IL10) showed opposite effect. Therapeutic evaluation in a murine advanced atherosclerosis model showed that Thsd1 overexpression decreased plaque vulnerability by attenuating intraplaque vascular leakage, subsequently reducing macrophage accumulation and necrotic core size. Mechanistic studies in human endothelial cells demonstrated that THSD1 activates FAK-PI3K, leading to Rac1-mediated actin cytoskeleton regulation of adherens junctions and focal adhesion assembly.

CONCLUSION: THSD1 is a new regulator of endothelial barrier function during vascular development and protects intraplaque microvessels against haemorrhaging in advanced atherosclerotic lesions.

Original languageEnglish
Pages (from-to)129-39
Number of pages11
JournalCardiovascular research
Volume110
Issue number1
DOIs
Publication statusPublished - 2016

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • Animals
  • Apolipoproteins E
  • Atherosclerosis
  • Carotid Artery Diseases
  • Endothelial Cells
  • Female
  • Humans
  • Male
  • Mice, Inbred C57BL
  • Microvessels
  • Neovascularization, Pathologic
  • Phosphatidylinositol 3-Kinases
  • Plaque, Atherosclerotic
  • Thrombospondin 1
  • Thrombospondins
  • Journal Article
  • Research Support, Non-U.S. Gov't

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