CO 2 signaling mediates neurovascular coupling in the cerebral cortex.

Autor: Hosford PS; Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London, UK. p.hosford@ucl.ac.uk., Wells JA; UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK., Nizari S; Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London, UK., Christie IN; Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London, UK., Theparambil SM; Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London, UK., Castro PA; Centro de Estudios Científicos (CECs) & Universidad San Sebastián, Valdivia, Chile.; Universidad Austral de Chile, Valdivia, Chile., Hadjihambi A; Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London, UK., Barros LF; Centro de Estudios Científicos (CECs) & Universidad San Sebastián, Valdivia, Chile., Ruminot I; Centro de Estudios Científicos (CECs) & Universidad San Sebastián, Valdivia, Chile. iruminot@cecs.cl., Lythgoe MF; UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK., Gourine AV; Centre for Cardiovascular and Metabolic Neuroscience, Neuroscience, Physiology and Pharmacology, University College London, London, UK. a.gourine@ucl.ac.uk.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Apr 19; Vol. 13 (1), pp. 2125. Date of Electronic Publication: 2022 Apr 19.
DOI: 10.1038/s41467-022-29622-9
Abstrakt: Neurovascular coupling is a fundamental brain mechanism that regulates local cerebral blood flow (CBF) in response to changes in neuronal activity. Functional imaging techniques are commonly used to record these changes in CBF as a proxy of neuronal activity to study the human brain. However, the mechanisms of neurovascular coupling remain incompletely understood. Here we show in experimental animal models (laboratory rats and mice) that the neuronal activity-dependent increases in local CBF in the somatosensory cortex are prevented by saturation of the CO 2 -sensitive vasodilatory brain mechanism with surplus of exogenous CO 2 or disruption of brain CO 2 /HCO 3 - transport by genetic knockdown of electrogenic sodium-bicarbonate cotransporter 1 (NBCe1) expression in astrocytes. A systematic review of the literature data shows that CO 2 and increased neuronal activity recruit the same vasodilatory signaling pathways. These results and analysis suggest that CO 2 mediates signaling between neurons and the cerebral vasculature to regulate brain blood flow in accord with changes in the neuronal activity.
(© 2022. The Author(s).)
Databáze: MEDLINE
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