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Annual Review of Physiology

Volume 85, 2023

Pericytes and the Control of Blood Flow in Brain and Heart

Abstract

Pericytes, attached to the surface of capillaries, play an important role in regulating local blood flow. Using optogenetic tools and genetically encoded reporters in conjunction with confocal and multiphoton imaging techniques, the 3D structure, anatomical organization, and physiology of pericytes have recently been the subject of detailed examination. This work has revealed novel functions of pericytes and morphological features such as tunneling nanotubes in brain and tunneling microtubes in heart. Here, we discuss the state of our current understanding of the roles of pericytes in blood flow control in brain and heart, where functions may differ due to the distinct spatiotemporal metabolic requirements of these tissues. We also outline the novel concept of electro-metabolic signaling, a universal mechanistic framework that links tissue metabolic state with blood flow regulation by pericytes and vascular smooth muscle cells, with capillary K and Kir2.1 channels as primary sensors. Finally, we present major unresolved questions and outline how they can be addressed.

Keyword(s): brain, calcium, electro-metabolic signaling, heart, ion channels, metabolism, neurovascular coupling, pericytes, potassium
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/content/journals/10.1146/annurev-physiol-031522-034807
2023-02-10
2024-04-29
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Pericytes and the Control of Blood Flow in Brain and Heart
Annual Review of Physiology 85, 137 (2023); https://doi.org/10.1146/annurev-physiol-031522-034807
/content/journals/10.1146/annurev-physiol-031522-034807
/content/journals/10.1146/annurev-physiol-031522-034807
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