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Detection of Microregional Hypoxia in Mouse Cerebral Cortex by Two-photon Imaging of Endogenous NADH Fluorescence
Published on: February 21, 2012
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Function and development of interneurons involved in brain tissue oxygen regulation
Daniil P Aksenov1,2,3, David A Gascoigne1, Jubao Duan4,5
1Department of Radiology, NorthShore University HealthSystem, Evanston, IL, United States.
Frontiers in Molecular Neuroscience
|December 12, 2022
Summary
Brain oxygen regulation relies on GABAergic interneurons. Different interneuron subtypes (NOS, VIP, SST) uniquely control blood flow, with distinct developmental timelines impacting neurovascular system maturation.
Area of Science:
- Neuroscience
- Neurovascular Biology
- Brain Metabolism
Background:
- Maintaining optimal brain tissue oxygen is critical for neuronal health, balancing hypoxia prevention and reactive oxygen species production.
- Neurovascular interactions, involving neuronal and glial cells, are key to regulating oxygen delivery.
- GABAergic interneurons play a crucial role in neurovascular coupling, extending beyond inhibition to direct microvascular modulation.
Purpose of the Study:
- To review the diverse functions and developmental trajectories of specific interneuron subtypes in regulating brain oxygen.
- To highlight the differential impact of interneuron subtypes on microvascular tone (vasodilation/vasoconstriction).
- To explore the implications of distinct developmental timelines for interneuron-mediated oxygen regulation.
Main Methods:
- Literature review focusing on GABAergic interneurons and their role in neurovascular coupling.
- Analysis of studies detailing the functional effects of NOS, VIP, and SST interneurons on cerebral microvasculature.
- Examination of research on the developmental maturation of these interneuron populations.
Main Results:
- Nitric oxide synthase (NOS)-expressing interneurons can induce both vasodilation and vasoconstriction.
- Vasoactive intestinal peptide (VIP)-expressing interneurons primarily mediate vasodilation.
- Somatostatin (SST)-expressing interneurons typically induce vasoconstriction.
- NOS interneurons mature early in development, while VIP and SST interneurons have key developmental milestones during adolescence.
Conclusions:
- Interneuron subtypes exhibit distinct roles and developmental timing in regulating brain oxygen levels.
- Early developmental insults may disproportionately affect NOS interneuron-mediated neurovascular regulation.
- Later developmental insults may primarily impact VIP and SST interneuron-mediated oxygen regulation, suggesting critical developmental windows for neurovascular system integrity.
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