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Front Neurosci. 2019 Dec 4;13:1291. doi: 10.3389/fnins.2019.01291. eCollection 2019.

Vessel-Associated Immune Cells in Cerebrovascular Diseases: From Perivascular Macrophages to Vessel-Associated Microglia.

Author information

1
Department of Neurology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
2
Department of Pharmacology and Toxicology, School for Mental Health and Neuroscience, Maastricht University Medical Center+, Maastricht, Netherlands.
3
Department of Neurology, School for Cardiovascular Diseases, Maastricht University Medical Center+, Maastricht, Netherlands.
4
Department of Pathology, School for Cardiovascular Diseases, Maastricht University Medical Center+, Maastricht, Netherlands.
5
Department of Translational Neuroscience, School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Center+, Maastricht, Netherlands.

Abstract

Cerebral small vessels feed and protect the brain parenchyma thanks to the unique features of the blood-brain barrier. Cerebrovascular dysfunction is therefore seen as a detrimental factor for the initiation of several central nervous system (CNS) disorders, such as stroke, cerebral small vessel disease (cSVD), and Alzheimer's disease. The main working hypothesis linking cerebrovascular dysfunction to brain disorders includes the contribution of neuroinflammation. While our knowledge on microglia cells - the brain-resident immune cells - has been increasing in the last decades, the specific populations of microglia and macrophages surrounding brain vessels, vessel-associated microglia (VAM), and perivascular macrophages (PVMs), respectively, have been overlooked. This review aims to summarize the knowledge gathered on VAM and PVMs, to discuss existing knowledge gaps of importance for later studies and to summarize evidences for their contribution to cerebrovascular dysfunction.

KEYWORDS:

cerebral small vessel disease; cerebrovascular dysfunction; hypertension; macrophages; microglia; neuroinflammation; stroke; vascular cognitive impairment and dementia

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