Premium
Induction of blood‐brain barrier properties in cultured brain capillary endothelial cells: Comparison between primary glial cells and C6 cell line
Author(s) -
Boveri Monica,
Berezowski Vincent,
Price Anna,
Slupek Stephanie,
Lenfant AnneMarie,
Benaud Christelle,
Hartung Thomas,
Cecchelli Romeo,
Prieto Pilar,
Dehouck MariePierre
Publication year - 2005
Publication title -
glia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.954
H-Index - 164
eISSN - 1098-1136
pISSN - 0894-1491
DOI - 10.1002/glia.20189
Subject(s) - biology , blood–brain barrier , immunocytochemistry , cell culture , endothelial stem cell , microbiology and biotechnology , vascular permeability , astrocyte , tight junction , in vitro , neuroglia , immunology , endocrinology , central nervous system , biochemistry , genetics
The communication between glial cells and brain capillary endothelial cells is crucial for a well‐differentiated blood‐brain barrier (BBB). It has been suggested that in vitro primary glial cells (GCs) be replaced by the glial C6 cell line to standardise the model further. This study compares directly the structural and functional differentiation of bovine brain capillary endothelial cells (BBCECs) induced by co‐culture with rat primary GCs or C6 cells, for the first time. Trans‐endothelial electrical resistance (TEER) measurements showed that under no condition were C6 cells able to reproduce TEER values as high as in the presence of GCs. At the same time, permeability of the BBCECs to both radioactive sucrose and FITC‐inulin was 2.5‐fold higher when cells were co‐cultured with C6 than with GCs. Furthermore, immunocytochemistry studies showed different cell morphology and less developed tight junction pattern of BBCECs co‐cultured with C6 toward GCs. Additionally, studies on P‐glycoprotein (P‐gp) showed much lower P‐gp presence and activity in BBCECs co‐cultured with C6 than GCs. Both VEGF mRNA expression and protein content were dramatically increased when compared with GCs, suggesting that VEGF could be one of the factors responsible for higher permeability of BBB. Our results clearly indicate that, in the presence of the glial C6 cell line, BBCECs did not differentiate as well as in the co‐culture with primary GCs at both structural and functional levels. © 2005 Wiley‐Liss, Inc.