Comparison of three rat models of cerebral vasospasm.
A substantial number of rat models have been used to research subarachnoid hemorrhage-induced cerebral vasospasm; however, controversy exists regarding which method of selection is appropriate for this species. This study was designed to provide extensive information about the three most popular subarachnoid hemorrhage rat models: the endovascular puncture model, the single-hemorrhage model, and the double-hemorrhage model. In this study, the basilar artery and posterior communicating artery were chosen for histopathological examination and morphometric analysis. Both the endovascular puncture model and single-hemorrhage model developed significant degrees of vasospasm, which were less severe when compared with the double-hemorrhage model. The endovascular puncture model and double-hemorrhage model both developed more vasospasms in the posterior communicating artery than in the basilar artery. The endovascular puncture model has a markedly high mortality rate and high variability in bleeding volume. Overall, the present study showed that the double-hemorrhage model in rats is a more suitable tool with which to investigate mechanism and therapeutic approaches because it accurately correlates with the time courses for vasospasm in humans.
Gules
Ilker
I
Department of Neurosurgery, University of Mississippi Medical Center, Jackson 39216, USA.
Satoh
Motoyoshi
M
Clower
Ben R
BR
Nanda
Anil
A
Zhang
John H
JH
D000818:Animals; D001488:Basilar Artery / Q000473:pathology / Q000503:physiopathology; D004195:Disease Models, Animal; D018450:Disease Progression; D008297:Male; D020769:Posterior Cerebral Artery / Q000473:pathology / Q000503:physiopathology; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D013345:Subarachnoid Hemorrhage / Q000150:complications / Q000473:pathology / Q000503:physiopathology*; D015996:Survival Rate; D013997:Time Factors; D020301:Vasospasm, Intracranial / Q000209:etiology / Q000473:pathology / Q000503:physiopathology*