Mouse model of arterial injury.
In the present study, we established an injury model of the mouse carotid artery. Complete removal of the endothelium was achieved with a flexible wire. A platelet monolayer covered the denuded surface, and damage to underlying medial smooth muscle cells (SMCs) was detected. Injection of [3H]thymidine was used to determine the replication index for medial SMCs, which was found to be 1.6% at 2 days after denudation and 9.8% at 5 days. SMCs were observed in the intima by day 8 (replication index, 66%), and by 2 weeks the intimal lesion had a similar cell content as the media. In most animals, repair of the endothelial lining was complete 3 weeks after injury. The present model will allow us to use transgenic animals to address questions relevant to vascular biology and atherosclerosis.
Lindner
V
V
Department of Pathology, University of Washington School of Medicine, Seattle.
Fingerle
J
J
Reidy
M A
MA
D000818:Animals; D002339:Carotid Arteries / Q000473:pathology*; D002455:Cell Division; D004195:Disease Models, Animal; D004730:Endothelium, Vascular / Q000502:physiology*; D005260:Female; D051379:Mice; D009131:Muscle, Smooth, Vascular / Q000473:pathology*