Connexin37 reduces smooth muscle cell proliferation and intimal hyperplasia in a mouse model of carotid artery ligation.

Détails

ID Serval
serval:BIB_B56A5A19C4D1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Connexin37 reduces smooth muscle cell proliferation and intimal hyperplasia in a mouse model of carotid artery ligation.
Périodique
Cardiovascular research
Auteur(s)
Allagnat F., Dubuis C., Lambelet M., Le Gal L., Alonso F., Corpataux J.M., Déglise S., Haefliger J.A.
ISSN
1755-3245 (Electronic)
ISSN-L
0008-6363
Statut éditorial
Publié
Date de publication
01/06/2017
Peer-reviewed
Oui
Volume
113
Numéro
7
Pages
805-816
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Intimal hyperplasia (IH) is an abnormal response to vessel injury characterized by the dedifferentiation, migration, and proliferation of quiescent vascular smooth muscle cells (VSMC) to form a neointima layer. Vascular connexins (Cx) are involved in the pathophysiology of various vascular diseases, and Cx43, the main Cx expressed in VSMC, has been shown to promote VSMC proliferation and IH. The aim of this study was to investigate the participation of another Cx, namely Cx37, in the formation of the neointima layer.
Wild-type (WT) and Cx37-deficient (Cx37-/-) C57BL/6J mice were subjected to carotid artery ligation (CAL), a model of vessel injury and IH. The neointima developed linearly in WT until 28 days post surgery. In contrast, the neointima layer was almost absent 14 days after surgery in Cx37-/- mice, and twice as more developed after 28 days compared to WT mice. This large neointima formation correlated with a two-fold increase in cell proliferation in the media and neointima regions between 14 and 28 days in Cx37-/- mice compared to WT mice. The CAL triggered Cx43 overexpression in the media and neointima layers of ligated carotids in WT mice, and selectively up-regulated Cx37 expression in the media layer, but not in the neointima layer. The de novo expression of Cx37 in human primary VSMC reduced cell proliferation and P-Akt levels, in association with lower Cx43 levels, whereas Cx43 overexpression increased P-Akt levels.
The presence of Cx37 in the media layer of injured arteries restrains VSMC proliferation and limits the development of IH, presumably by interfering with the pro-proliferative effect of Cx43 and the Akt pathway.

Mots-clé
Aged, Animals, Carotid Arteries/metabolism, Carotid Arteries/pathology, Carotid Arteries/surgery, Carotid Artery Injuries/genetics, Carotid Artery Injuries/metabolism, Carotid Artery Injuries/pathology, Carotid Stenosis/genetics, Carotid Stenosis/metabolism, Carotid Stenosis/pathology, Cell Proliferation, Cells, Cultured, Connexin 43/metabolism, Connexins/deficiency, Connexins/genetics, Connexins/metabolism, Disease Models, Animal, Female, Humans, Hyperplasia, Ligation, Male, Mice, Inbred C57BL, Mice, Knockout, Muscle, Smooth, Vascular/metabolism, Muscle, Smooth, Vascular/pathology, Myocytes, Smooth Muscle/metabolism, Myocytes, Smooth Muscle/pathology, Neointima, Phosphorylation, Proto-Oncogene Proteins c-akt/metabolism, Signal Transduction, Time Factors, Carotid artery ligation, Cx37, Cx43, Gap junctions , Intimal hyperplasia, Proliferation, Smooth muscle cells,  Connexin 
Pubmed
Web of science
Open Access
Oui
Création de la notice
09/05/2017 19:38
Dernière modification de la notice
20/08/2019 16:23
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