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Blood-brain barrier permeability changes after experimental subarachnoid hemorrhage
A Germanó1, D d'Avella, R Cicciarello
1Neurosurgical Clinic, University of Messina, Italy.
Neurosurgery
|June 1, 1992
Summary
Subarachnoid hemorrhage (SAH) causes significant blood-brain barrier (BBB) breakdown in rats. This study quantifies BBB changes, offering insights into SAH-related brain dysfunction and aneurysm patient management.
Area of Science:
- Neuroscience
- Vascular Biology
- Pathophysiology
Background:
- Mechanisms of cerebrovascular permeability after subarachnoid hemorrhage (SAH) require detailed elucidation.
- Previous studies on blood-brain barrier (BBB) breakdown post-SAH have produced conflicting findings.
- Understanding BBB function post-SAH is crucial for managing neurological deficits.
Purpose of the Study:
- To quantitatively assess blood-brain barrier (BBB) changes following experimental subarachnoid hemorrhage (SAH).
- To investigate the impact of SAH on cerebrovascular permeability in specific brain regions.
- To provide data relevant to the pathogenesis of cerebral dysfunction and clinical management of SAH.
Main Methods:
- Utilized a rat model of subarachnoid hemorrhage (SAH).
- Employed the quantitative [14C]-alpha-aminoisobutyric acid technique to measure BBB transport.
- Assessed BBB changes on the second day post-SAH.
Main Results:
- Significant increase in [14C]-alpha-aminoisobutyric acid transport across the BBB in cerebral cortices and cerebellar gray matter of SAH rats.
- Transport values averaged 1.3 to 1.5 times higher compared to control groups.
- Demonstrated well-defined alterations in BBB function induced by SAH.
Conclusions:
- Subarachnoid hemorrhage (SAH) demonstrably increases cerebrovascular permeability.
- The observed BBB dysfunction may contribute to cerebral dysfunction following SAH.
- Findings have potential clinical implications for managing patients with aneurysms.