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Updated: Jun 4, 2026

Stimulation of Notch Signaling in Mouse Osteoclast Precursors
Published on: February 28, 2017
Soluble Jagged-1 inhibits neointima formation by attenuating Notch-Herp2 signaling
Vincenza Caolo1, Henny M Schulten, Zhen W Zhuang
1Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, the Netherlands.
Objective:
Notch has been implicated in neointima formation as reflected by increased Notch/Jagged expression on vascular injury and the promigratory effect of Notch signaling on smooth muscle cells. Soluble Jagged-1 (sJag1) has been shown to inhibit Notch signaling in vitro; however, its capacity to suppress neointima formation remains unknown.
Methods And Results:
Balloon injury of rat carotid arteries induced Notch1, Notch3, and Jagged-1 expression at days 3 and 14 postinjury. Notch signaling was activated as shown by increased expression of the Notch target gene Herp2. Adenoviral sJag1 (Ad-sJag1) transfection reduced neointima formation in carotid artery and enhanced reendothelialization, whereas adenoviral full-length Jagged-1 (Ad-Fl-Jag1) or LacZ had no effect. Injury-induced Herp2 expression was absent in vessels treated with Ad-sJag1. Consistently, Herp2 expression was reduced in Ad-sJag1-infected or recombinant sJag1 -treated coronary artery smooth muscle cells (CASMCs). Ad-sJag1 had no effect on human umbilical endothelial cell behavior, but it significantly reduced proliferation and migration of CASMCs. Overexpression of Herp2 in sJag1-treated CASMCs rescued the migratory and proliferative capacity in vitro.
Conclusions:
Our results demonstrate that sJag1 can inhibit neointima formation after balloon injury by decreasing smooth muscle cell proliferation and migration through interference with Notch-Herp2 signaling.
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