Where are we? The anatomy of the murine cortical meninges revisited for intravital imaging, immunology, and clearance of waste from the brain

Rapid progress is being made in understanding the roles of the cerebral meninges in the maintenance of normal brain function, in immune surveillance, and as a site of disease. Most basic research on the meninges and the neural brain is now done on mice, major attractions being the availability of re...

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Published in:Progress in neurobiology 2017-09, Vol.156, p.107-148
Main Authors: Coles, Jonathan A, Myburgh, Elmarie, Brewer, James M, McMenamin, Paul G
Format: Article
Language:English
Subjects:
Allergy and Immunology
Animals
Brain - anatomy & histology
Brain - diagnostic imaging
Brain - metabolism
Intravital Microscopy
Meninges - anatomy & histology
Meninges - diagnostic imaging
Meninges - metabolism
Mice
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description Rapid progress is being made in understanding the roles of the cerebral meninges in the maintenance of normal brain function, in immune surveillance, and as a site of disease. Most basic research on the meninges and the neural brain is now done on mice, major attractions being the availability of reporter mice with fluorescent cells, and of a huge range of antibodies useful for immunocytochemistry and the characterization of isolated cells. In addition, two-photon microscopy through the unperforated calvaria allows intravital imaging of the undisturbed meninges with sub-micron resolution. The anatomy of the dorsal meninges of the mouse (and, indeed, of all mammals) differs considerably from that shown in many published diagrams: over cortical convexities, the outer layer, the dura, is usually thicker than the inner layer, the leptomeninx, and both layers are richly vascularized and innervated, and communicate with the lymphatic system. A membrane barrier separates them and, in disease, inflammation can be localized to one layer or the other, so experimentalists must be able to identify the compartment they are studying. Here, we present current knowledge of the functional anatomy of the meninges, particularly as it appears in intravital imaging, and review their role as a gateway between the brain, blood, and lymphatics, drawing on information that is scattered among works on different pathologies.
doi_str_mv 10.1016/j.pneurobio.2017.05.002
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subjects Allergy and Immunology
Animals
Brain - anatomy & histology
Brain - diagnostic imaging
Brain - metabolism
Intravital Microscopy
Meninges - anatomy & histology
Meninges - diagnostic imaging
Meninges - metabolism
Mice
title Where are we? The anatomy of the murine cortical meninges revisited for intravital imaging, immunology, and clearance of waste from the brain
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