Related Experiment Video
Updated: Jul 1, 2026
12:15
Optimized System for Cerebral Perfusion Monitoring in the Rat Stroke Model of Intraluminal Middle Cerebral Artery Occlusion
Published on: February 17, 2013
Chronic hypoperfusion increases claudin-3 immunoreactivity in rat brain.
Jin Seon Shin1, Seung Ye Hyun, Dong Hyun Kim
1Department of Oriental Pharmaceutical Science and Kyunghee East-West Pharmaceutical Institute, College of Pharmacy, Kyung Hee University, Hoeki-dong, Dongdaemoon-Ku, Seoul 130-701, Republic of Korea.
Neuroscience Letters
|September 11, 2008
Summary
Chronic cerebral hypoperfusion increases claudin-3 and neutrophil infiltration in rat brains. These changes in the blood-brain barrier (BBB) tight junctions and immune cell activity are observed in cortical and thalamic regions.
Area of Science:
- Neuroscience
- Cerebrovascular Biology
- Pathology
Background:
- The blood-brain barrier (BBB) protects the brain but its tight junction components under chronic hypoperfusion are poorly understood.
- Chronic cerebral hypoperfusion is a significant factor in neurological disorders.
Purpose of the Study:
- To investigate the temporal changes in claudin-3 and myeloperoxidase (MPO) in rat brain regions following chronic cerebral hypoperfusion.
- To assess the impact of hypoperfusion on BBB integrity and neutrophil infiltration.
Main Methods:
- Chronic cerebral hypoperfusion was induced in rats by occluding the common carotid arteries.
- Immunoreactivity for claudin-3 and MPO was analyzed at 1, 2, 3, and 6 weeks post-occlusion.
- Blood-brain barrier breakdown was confirmed using Evans Blue leakage.
Main Results:
- BBB breakdown was evident from 2 weeks post-occlusion in cortical and thalamic regions.
- Claudin-3 immunoreactivity increased in cortical regions at 2 weeks, and in both cortical and thalamic regions by 3 weeks, persisting for 6 weeks.
- MPO immunoreactivity, indicating neutrophil infiltration, increased in the thalamus at 2 weeks and in both regions by 3 weeks, persisting for 6 weeks.
Conclusions:
- Chronic cerebral hypoperfusion leads to increased claudin-3 and neutrophil infiltration in the brain.
- These findings demonstrate alterations in BBB tight junction status and neuroinflammation during chronic hypoperfusion.
- The study highlights the dynamic changes in BBB components and immune response in the context of reduced cerebral blood flow.
