Targetability of the neurovascular unit in inflammatory diseases of the central nervous system

Summary The blood–brain barrier (BBB) is a selectively permeable barrier separating the periphery from the central nervous system (CNS). The BBB restricts the flow of most material into and out of the CNS, including many drugs that could be used as potent therapies. BBB permeability is modulated by...

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Veröffentlicht in:Immunological reviews 2022-10, Vol.311 (1), p.39-49
Hauptverfasser: Smith, Brandon C., Tinkey, Rachel A., Shaw, Benjamin C., Williams, Jessica L.
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Tinkey, Rachel A.
Shaw, Benjamin C.
Williams, Jessica L.
description Summary The blood–brain barrier (BBB) is a selectively permeable barrier separating the periphery from the central nervous system (CNS). The BBB restricts the flow of most material into and out of the CNS, including many drugs that could be used as potent therapies. BBB permeability is modulated by several cells that are collectively called the neurovascular unit (NVU). The NVU consists of specialized CNS endothelial cells (ECs), pericytes, astrocytes, microglia, and neurons. CNS ECs maintain a complex “seal” via tight junctions, forming the BBB; breakdown of these tight junctions leads to BBB disruption. Pericytes control the vascular flow within capillaries and help maintain the basal lamina. Astrocytes control much of the flow of material that has moved beyond the CNS EC layer and can form a secondary barrier under inflammatory conditions. Microglia survey the border of the NVU for noxious material. Neuronal activity also plays a role in the maintenance of the BBB. Since astrocytes, pericytes, microglia, and neurons are all able to modulate the permeability of the BBB, understating the complex contributions of each member of the NVU will potentially uncover novel and effective methods for delivery of neurotherapies to the CNS.
doi_str_mv 10.1111/imr.13121
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subjects Astrocytes
Astrocytes - metabolism
Basal lamina
Blood-brain barrier
Blood-Brain Barrier - physiology
Capillaries
Central Nervous System
endothelial cell
Endothelial cells
Endothelial Cells - physiology
glia
Humans
Inflammatory diseases
Membrane permeability
Microglia
Nervous system
neuroinflammatory disease
Neurons
pericyte
Pericytes
Pericytes - metabolism
Permeability
tight junction
Tight junctions
title Targetability of the neurovascular unit in inflammatory diseases of the central nervous system
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