Differences in the molecular structure of the blood-brain barrier in the cerebral cortex and white matter an in silico, in vitro, and ex vivo study /

The blood-brain barrier (BBB) is the main interface controlling molecular and cellular traffic between the central nervous system (CNS) and the periphery. It consists of cerebral endothelial cells (CECs) interconnected by continuous tight junctions, and closely associated pericytes and astrocytes....

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Bibliographic Details
Main Authors: Nyúl-Tóth Ádám
Suciu Maria
Molnár Judit
Fazakas Csilla
Haskó János
Herman Hildegard
Farkas Elek Attila
Kaszaki József
Hermenean Anca
Wilhelm Imola Mária
Krizbai István Adorján
Format: Article
Published: 2016
Series:AMERICAN JOURNAL OF PHYSIOLOGY: HEART AND CIRCULATORY PHYSIOLOGY 310 No. 11
doi:10.1152/ajpheart.00774.2015

mtmt:3082581
Online Access:http://publicatio.bibl.u-szeged.hu/8780
Description
Summary:The blood-brain barrier (BBB) is the main interface controlling molecular and cellular traffic between the central nervous system (CNS) and the periphery. It consists of cerebral endothelial cells (CECs) interconnected by continuous tight junctions, and closely associated pericytes and astrocytes. Different parts of the CNS have diverse functions and structures and may be subject of different pathologies, in which the BBB is actively involved. It is largely unknown, however, what are the cellular and molecular differences of the BBB in different regions of the brain. Using in silico, in vitro, and ex vivo techniques we compared the expression of BBB-associated genes and proteins (i.e., markers of CECs, brain pericytes, and astrocytes) in the cortical grey matter and white matter. In silico human database analysis (obtained from recalculated data of the Allen Brain Atlas), qPCR, Western blot, and immunofluorescence studies on porcine and mouse brain tissue indicated an increased expression of glial fibrillary acidic protein in astrocytes in the white matter compared with the grey matter. We have also found increased expression of genes of the junctional complex of CECs (occludin, claudin-5, and alpha-catenin) in the white matter compared with the cerebral cortex. Accordingly, occludin, claudin-5, and alpha-catenin proteins showed increased expression in CECs of the white matter compared with endothelial cells of the cortical grey matter. In parallel, barrier properties of white matter CECs were superior as well. These differences might be important in the pathogenesis of diseases differently affecting distinct regions of the brain.
Physical Description:H1702-H1714
ISSN:0363-6135