Format

Send to

Choose Destination
J Neurosurg. 2019 Nov 22:1-11. doi: 10.3171/2019.9.JNS191934. [Epub ahead of print]

New endovascular perforation subarachnoid hemorrhage model for investigating the mechanisms of delayed brain injury.

Author information

1
1Department of Neurosurgery and.
2
2Division of Environmental Medicine, National Defense Medical College, Tokorozawa, Saitama; and.
3
3Department of Neurosurgery, Tokyo General Hospital, Tokyo, Japan.

Abstract

OBJECTIVE:

Delayed brain injury (DBI) is considered one of the most important causes of mortality and morbidity after subarachnoid hemorrhage (SAH). However, no suitable experimental rat endovascular perforation (EVP) SAH model was available for investigating DBI. The authors added early cerebral hypoperfusion to a mild EVP SAH model by unilateral common carotid artery occlusion (UCCAO) 24 hours after induction of SAH to mimic the clinical course of early cerebral hypoperfusion after SAH.

METHODS:

A total of 109 adult male Sprague-Dawley rats were randomly divided into 2 groups: no SAH and SAH. Next, no-SAH rats were randomly divided on day 1 into 2 groups: sham and UCCAO. SAH rats with a neurological score of 15 or greater were randomly divided into 2 groups: SAH - UCCAO and SAH + UCCAO group.

RESULTS:

The mild SAH model had a lower mortality rate of 5.4% within the first 24 hours. No rat died in the SAH + UCCAO group until day 7. DBI as well as early brain injury (EBI), reactive astrogliosis, and cerebral vasospasm significantly worsened in the SAH + UCCAO group.

CONCLUSIONS:

The present SAH + UCCAO model can simulate EBI with aggravation of reactive astrogliosis, cerebral vasospasm, and DBI but without high mortality.

KEYWORDS:

ACA = anterior cerebral artery; BA = basilar artery; CCA = common carotid artery; CPP = cerebral perfusion pressure; CV = cerebral vasospasm; DBI = delayed brain injury; DG = dentate gyrus; EBI = early brain injury; ECA = external carotid artery; EVP = endovascular perforation; GFAP = glial fibrillary acidic protein; ICA = internal carotid artery; ICP = intracranial pressure; MABP = mean arterial blood pressure; SAH = subarachnoid hemorrhage; UCCAO = unilateral common carotid artery occlusion; delayed brain injury; early brain injury; endovascular perforation model; pJNK = phosphorylated C-Jun N-terminal kinase; reactive astrogliosis; subarachnoid hemorrhage; vascular disorders

PMID:
31756704
DOI:
10.3171/2019.9.JNS191934

Supplemental Content

Full text links

Icon for Sheridan PubFactory
Loading ...
Support Center