Changes Of The Blood-Brain Barrier Permeability, Ultrastructure, And Protein And Gene Expressions In A Rat Model Of Cerebral Hypoperfusion

Cerebral hypoperfusion is a condition where there is reduced blood flow to the brain. This condition is observed in patients with cardiovascular diseases, hypertension and among the aging population. Cerebral hypoperfusion leads to more severe neurological diseases including vascular dementia, Alzhe...

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主要作者: Sekaran, Hema
格式: Thesis
語言:English
出版: 2019
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spelling my-usm-ep.466292020-06-26T08:27:52Z Changes Of The Blood-Brain Barrier Permeability, Ultrastructure, And Protein And Gene Expressions In A Rat Model Of Cerebral Hypoperfusion 2019-04 Sekaran, Hema R5-920 Medicine (General) Cerebral hypoperfusion is a condition where there is reduced blood flow to the brain. This condition is observed in patients with cardiovascular diseases, hypertension and among the aging population. Cerebral hypoperfusion leads to more severe neurological diseases including vascular dementia, Alzheimer’s disease and multiple sclerosis. Cerebral hypoperfusion induces damages to the blood-brain barrier (BBB) and this detailed study was carried out to understand the BBB behavior during cerebral hypoperfusion. In this study, two-vessel occlusion (2VO) model was used to mimic cerebral hypoperfusion in rats. Using exogenous tracers of different molecular weight i.e. Evans blue dye (69 kDa) as a marker for macromolecule leakage, and sodium fluorescein (376 Da) as a marker for small molecule leakage, BBB leakages to Evans blue dye was observed during the early phase of cerebral hypoperfusion, 1-day post-surgery in the brain regions frontal cortex, posterior cortex and thalamus-midbrain. Using transmission electron microscopy, vesicles and formation of fenestration in endothelial cells, and swelling of astrocyte end-feet were observed, indicating cellular damages leading to BBB leakages during cerebral hypoperfusion. 2019-04 Thesis http://eprints.usm.my/46629/ http://eprints.usm.my/46629/1/thesis%20final%20print%20%28one%20file%29_hema_1704201924.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Penyelidikan Dadah dan Ubat-ubatan
institution Universiti Sains Malaysia
collection USM Institutional Repository
language English
topic R5-920 Medicine (General)
spellingShingle R5-920 Medicine (General)
Sekaran, Hema
Changes Of The Blood-Brain Barrier Permeability, Ultrastructure, And Protein And Gene Expressions In A Rat Model Of Cerebral Hypoperfusion
description Cerebral hypoperfusion is a condition where there is reduced blood flow to the brain. This condition is observed in patients with cardiovascular diseases, hypertension and among the aging population. Cerebral hypoperfusion leads to more severe neurological diseases including vascular dementia, Alzheimer’s disease and multiple sclerosis. Cerebral hypoperfusion induces damages to the blood-brain barrier (BBB) and this detailed study was carried out to understand the BBB behavior during cerebral hypoperfusion. In this study, two-vessel occlusion (2VO) model was used to mimic cerebral hypoperfusion in rats. Using exogenous tracers of different molecular weight i.e. Evans blue dye (69 kDa) as a marker for macromolecule leakage, and sodium fluorescein (376 Da) as a marker for small molecule leakage, BBB leakages to Evans blue dye was observed during the early phase of cerebral hypoperfusion, 1-day post-surgery in the brain regions frontal cortex, posterior cortex and thalamus-midbrain. Using transmission electron microscopy, vesicles and formation of fenestration in endothelial cells, and swelling of astrocyte end-feet were observed, indicating cellular damages leading to BBB leakages during cerebral hypoperfusion.
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Sekaran, Hema
author_facet Sekaran, Hema
author_sort Sekaran, Hema
title Changes Of The Blood-Brain Barrier Permeability, Ultrastructure, And Protein And Gene Expressions In A Rat Model Of Cerebral Hypoperfusion
title_short Changes Of The Blood-Brain Barrier Permeability, Ultrastructure, And Protein And Gene Expressions In A Rat Model Of Cerebral Hypoperfusion
title_full Changes Of The Blood-Brain Barrier Permeability, Ultrastructure, And Protein And Gene Expressions In A Rat Model Of Cerebral Hypoperfusion
title_fullStr Changes Of The Blood-Brain Barrier Permeability, Ultrastructure, And Protein And Gene Expressions In A Rat Model Of Cerebral Hypoperfusion
title_full_unstemmed Changes Of The Blood-Brain Barrier Permeability, Ultrastructure, And Protein And Gene Expressions In A Rat Model Of Cerebral Hypoperfusion
title_sort changes of the blood-brain barrier permeability, ultrastructure, and protein and gene expressions in a rat model of cerebral hypoperfusion
granting_institution Universiti Sains Malaysia
granting_department Pusat Penyelidikan Dadah dan Ubat-ubatan
publishDate 2019
url http://eprints.usm.my/46629/1/thesis%20final%20print%20%28one%20file%29_hema_1704201924.pdf
_version_ 1747821700360175616