Molecular characterization of perivascular drainage pathways in the murine brain.
J Cereb Blood Flow Metab
; 38(4): 669-686, 2018 04.
Article
in En
| MEDLINE
| ID: mdl-29283289
ABSTRACT
Perivascular compartments surrounding central nervous system (CNS) vessels have been proposed to serve key roles in facilitating cerebrospinal fluid flow into the brain, CNS waste transfer, and immune cell trafficking. Traditionally, these compartments were identified by electron microscopy with limited molecular characterization. Using cellular markers and knowledge on cellular sources of basement membrane laminins, we here describe molecularly distinct compartments surrounding different vessel types and provide a comprehensive characterization of the arachnoid and pial compartments and their connection to CNS vessels and perivascular pathways. We show that differential expression of plectin, E-cadherin and laminins α1, α2, and α5 distinguishes pial and arachnoid layers at the brain surface, while endothelial and smooth muscle laminins α4 and α5 and smooth muscle actin differentiate between arterioles and venules. Tracer studies reveal that interconnected perivascular compartments exist from arterioles through to veins, potentially providing a route for fluid flow as well as the transport of large and small molecules.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Blood Vessels
/
Brain
/
Cerebrospinal Fluid
Limits:
Animals
Language:
En
Journal:
J Cereb Blood Flow Metab
Year:
2018
Document type:
Article
Affiliation country:
Germany