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Moderate changes in CO2 modulate the firing of neurons in the VTA and substantia nigra
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Hill, Emily, Dale, Nicholas and Wall, Mark J. (2020) Moderate changes in CO2 modulate the firing of neurons in the VTA and substantia nigra. iScience, 23 (7). 101343. doi:10.1016/j.isci.2020.101343 ISSN 2589-0042.
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Official URL: https://doi.org/10.1016/j.isci.2020.101343
Abstract
The substantia nigra (SN) and ventral tegmental area (VTA) are vital for the control of movement, goal-directed behavior, and encoding reward. Here we show that the firing of specific neuronal subtypes in these nuclei can be modulated by physiological changes in the partial pressure of carbon dioxide (PCO2). The resting conductance of substantia nigra dopaminergic neurons in young animals (postnatal days 7–10) and GABAergic neurons in the VTA is modulated by changes in the level of CO2. We provide several lines of evidence that this CO2-sensitive conductance results from connexin 26 (Cx26) hemichannel expression. Since the levels of PCO2 in the blood will vary depending on physiological activity and pathology, this suggests that changes in PCO2 could potentially modulate motor activity, reward behavior, and wakefulness.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QP Physiology | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||
| Library of Congress Subject Headings (LCSH): | Substantia nigra, Carbon dioxide, Mesencephalic tegmentum | ||||||||
| Journal or Publication Title: | iScience | ||||||||
| Publisher: | Cell Press | ||||||||
| ISSN: | 2589-0042 | ||||||||
| Official Date: | 24 July 2020 | ||||||||
| Dates: |
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| Volume: | 23 | ||||||||
| Number: | 7 | ||||||||
| Article Number: | 101343 | ||||||||
| DOI: | 10.1016/j.isci.2020.101343 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 9 July 2020 | ||||||||
| Date of first compliant Open Access: | 15 July 2020 | ||||||||
| RIOXX Funder/Project Grant: |
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