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2017 ; 8
(ä): 308
Nephropedia Template TP
gab.com Text
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English Wikipedia
Cell-Cell Interaction Proteins (Gap Junctions, Tight Junctions, and Desmosomes)
and Water Transporter Aquaporin 4 in Meningothelial Cells of the Human Optic
Nerve
#MMPMID28706505
Zeleny TNC
; Kohler C
; Neutzner A
; Killer HE
; Meyer P
Front Neurol
2017[]; 8
(ä): 308
PMID28706505
show ga
PURPOSE: Meningothelial cells (MECs) play a central role in the maintenance of
cerebrospinal fluid (CSF) homeostasis and in physiological and pathophysiological
processes within the subarachnoid space (SAS) linking them to optic nerve (ON)
pathologies. Still, not much is known about their structural properties that
might enable MECs to perform specific functions within the ON microenvironment.
METHODS: For closer characterization of the structural properties of the human
MEC layer in the arachnoid, we performed immunohistological analyses to evaluate
the presence of cell-cell interaction markers, namely, markers for tight
junctions (JAM1, Occludin, and Claudin 5), gap junctions (Connexin 26 and 43),
and desmosomes (Desmoplakin) as well as for water channel marker aquaporin 4
(AQP4) in retrobulbar, midorbital, and intracanalicular human ON sections.
RESULTS: MECs displayed immunopositivity for markers of tight junctions (JAM1,
Occludin, and Claudin 5) and gap junctions (Connexin 26 and 43) as well as for
AQP4 water channels. However, no immunopositivity was found for Desmoplakin.
CONCLUSION: MECs are connected via tight junctions and gap junctions, and they
possess AQP4 water channels. The presence of these proteins emphasizes the
important function of MECs within the ON microenvironment as part of the
meningeal barrier. Beyond this barrier function, the expression of these proteins
by MECs supports a broader role of these cells in signal transduction and CSF
clearance pathways within the ON microenvironment.