Common and distinctive pathogenetic features of arteriovenous malformations in hereditary hemorrhagic telangiectasia 1 and hereditary hemorrhagic telangiectasia 2 animal models - Brief report
Document Type
Article
Abstract
© 2014 American Heart Association, Inc. Objective - Hereditary hemorrhagic telangiectasia is a genetic disorder characterized by visceral and mucocutaneous arteriovenous malformations (AVMs). Clinically indistinguishable hereditary hemorrhagic telangiectasia 1 and hereditary hemorrhagic telangiectasia 2 are caused by mutations in ENG and ALK1, respectively. In this study, we have compared the development of visceral and mucocutaneous AVMs in adult stages between Eng- and Alk1-inducible knockout (iKO) models.Approach and Results - Eng or Alk1 were deleted from either vascular endothelial cells (ECs) or smooth muscle cells in adult stages using Scl-CreER and Myh11-CreER lines, respectively. Latex perfusion and intravital spectral imaging in a dorsal skinfold window chamber system were used to visualize remodeling vasculature during AVM formation. Global Eng deletion resulted in lethality with visceral AVMs and wound-induced skin AVMs. Deletion of Alk1 or Eng in ECs, but not in smooth muscle cells, resulted in wound-induced skin AVMs. Visceral AVMs were observed in EC-specific Alk1- iKO but not in Eng-iKO. Intravital spectral imaging revealed that Eng-iKO model exhibited more dynamic processes for AVM development when compared with Alk1-iKO model.Conclusions - Both Alk1- and Eng-deficient models require a secondary insult, such as wounding, and ECs are the primary cell type responsible for the pathogenesis. However, Alk1 but not Eng deletion in ECs results in visceral AVMs.
Keywords
Alk1 protein, mouse, Arteriovenous malformations, Endoglin protein, mouse, Endothelial cells, Myocytes, smooth muscle, Telangiectasia, hereditary hemorrhagic
Publication Date
1-1-2014
Publication Title
Arteriosclerosis, Thrombosis, and Vascular Biology
ISSN
10795642
E-ISSN
15244636
Volume
34
Issue
10
First Page
2232
Last Page
2236
PubMed ID
25082229
Digital Object Identifier (DOI)
10.1161/ATVBAHA.114.303984
Recommended Citation
Garrido-Martin, Eva M.; Nguyen, Ha Long; Cunningham, Tyler A.; Choe, Se Woon; Jiang, Zhihua; Arthur, Helen M.; Lee, Young Jae; and Oh, S. Paul, "Common and distinctive pathogenetic features of arteriovenous malformations in hereditary hemorrhagic telangiectasia 1 and hereditary hemorrhagic telangiectasia 2 animal models - Brief report" (2014). Translational Neuroscience. 670.
https://scholar.barrowneuro.org/neurobiology/670