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Related Experiment Video

Updated: Oct 21, 2025

Rapid and Refined CD11b Magnetic Isolation of Primary Microglia with Enhanced Purity and Versatility

Rapid and Refined CD11b Magnetic Isolation of Primary Microglia with Enhanced Purity and Versatility

Published on: April 13, 2017

Capillary-associated microglia regulate vascular structure and function through PANX1-P2RY12 coupling in mice.

Kanchan Bisht^1,2, Kenneth A Okojie^1,2, Kaushik Sharma^1,2

¹Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA.

Nature Communications

|September 7, 2021

Summary

This summary is machine-generated.

Brain microglia interact with capillaries, regulating blood flow and vessel function. Purines released via PANX1 channels activate microglial P2RY12 receptors, impacting neurovascular health.

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Last Updated: Oct 21, 2025

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Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates

Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates

Published on: January 30, 2014

Area of Science:

Neuroscience
Immunology
Vascular Biology

Background:

Microglia, brain immune cells, have poorly understood interactions with brain vasculature.
Their role in regulating vascular physiology requires further investigation.

Purpose of the Study:

To characterize capillary-associated microglia (CAMs) and their interactions with brain capillaries.
To elucidate the molecular mechanisms regulating CAMs and their impact on neurovascular function.

Main Methods:

Molecular, morphological, and ultrastructural analysis of microglia.
Spatio-temporal characterization of CAMs versus parenchymal microglia (PCMs).
Investigation using P2RY12 knockout and PANX1 knockout mouse models.

Main Results:

Identified ramified CX3CR1+ myeloid cells interacting with brain capillaries as bona fide microglia.
Demonstrated P2RY12 receptors regulate CAM interactions, controlled by purines from PANX1 channels.
Microglial depletion caused capillary dilation, increased blood flow, and impaired vasodilation, mimicking knockout models.

Conclusions:

Capillary-associated microglia play a critical role in regulating cerebral blood flow and vascular tone.
Purinergic signaling via PANX1 channels and P2RY12 receptors is essential for microglial regulation of neurovascular function.