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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Cereb+Blood+Flow+Metab
2017 ; 37
(4
): 1374-1385
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English Wikipedia
Paravascular channels, cisterns, and the subarachnoid space in the rat brain: A
single compartment with preferential pathways
#MMPMID27306753
Bedussi B
; van der Wel NN
; de Vos J
; van Veen H
; Siebes M
; VanBavel E
; Bakker EN
J Cereb Blood Flow Metab
2017[Apr]; 37
(4
): 1374-1385
PMID27306753
show ga
Recent evidence suggests an extensive exchange of fluid and solutes between the
subarachnoid space and the brain interstitium, involving preferential pathways
along blood vessels. We studied the anatomical relations between brain
vasculature, cerebrospinal fluid compartments, and paravascular spaces in male
Wistar rats. A fluorescent tracer was infused into the cisterna magna, without
affecting intracranial pressure. Tracer distribution was analyzed using a 3D
imaging cryomicrotome, confocal microscopy, and correlative light and electron
microscopy. We found a strong 3D colocalization of tracer with major arteries and
veins in the subarachnoid space and large cisterns, attributed to relatively
large subarachnoid space volumes around the vessels. Confocal imaging confirmed
this colocalization and also revealed novel cisternal connections between the
subarachnoid space and ventricles. Unlike the vessels in the subarachnoid space,
penetrating arteries but not veins were surrounded by tracer. Correlative light
and electron microscopy images indicated that this paravascular space was located
outside of the endothelial layer in capillaries and just outside of the smooth
muscle cells in arteries. In conclusion, the cerebrospinal fluid compartment,
consisting of the subarachnoid space, cisterns, ventricles, and para-arteriolar
spaces, forms a continuous and extensive network that surrounds and penetrates
the rat brain, in which mixing may facilitate exchange between interstitial fluid
and cerebrospinal fluid.