Article (Scientific journals)
Subsaturation of the NMDAR glycine site allows the regulation of bursting activity in juvenile rat nigral dopamine neurons
Destreel, Geoffrey; Seutin, Vincent; Engel, Dominique
2019In European Journal of Neuroscience, 50 (9), p. 3454-3471
Peer Reviewed verified by ORBi
 

Files


Full Text
destreel_engel_19.pdf
Publisher postprint (1.36 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
dopamine neuron; substantia nigra; NMDA receptors
Abstract :
[en] The activation of N-methyl-D-aspartate receptors (NMDARs) in substantia nigra pars compacta (SNc) dopamine (DA) cells is central to generate the bursting activity, a phasic signal linked to DA related behaviors via the change in postsynaptic DA release. NMDARs are recruited during excitatory synaptic transmission by glutamate release but the glycine site level of occupancy of these receptors during basal action potential-dependent activity is not known for SNc DA neurons. We explored NMDARdependent signals during exogenous applications of co-agonists in midbrain slices from juvenile rats. We found that both glycine and D-serine strengthened the NMDAR-dependent component of excitatory postsynaptic currents (EPSCs) in a concentration-dependent manner. EPSCs were also increased by endogenous glycine via the blockade of the glycine transport. The glycine site of NMDARs contributing to synaptic transmission is therefore subsaturated. The behaviorally relevant burst firing was more sensitive to exogenous D-serine and endogenous glycine than to exogenous glycine. The mechanisms regulating the availability of the co-agonists exert consequently a critical influence on the excitability of DA neurons via NMDARs. The modulation of the phasic firing in DA neurons by ambient NMDAR co-agonists may be important for nigral information processing and downstream motor-related behavior.
Research center :
Giga-Neurosciences - ULiège
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Destreel, Geoffrey ;  Université de Liège - ULiège > Neurosciences-Neurophysiology
Seutin, Vincent ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Pharmacologie
Engel, Dominique  ;  Université de Liège - ULiège > Neurosciences-Neurophysiology
Language :
English
Title :
Subsaturation of the NMDAR glycine site allows the regulation of bursting activity in juvenile rat nigral dopamine neurons
Alternative titles :
[en] La sous-saturation du site de la glycine des récepteurs NMDA permet la régulation de l'activité en bouffée dans les neurones à dopamine de la substance noire compacte de rat juvénile
Publication date :
10 June 2019
Journal title :
European Journal of Neuroscience
ISSN :
0953-816X
eISSN :
1460-9568
Publisher :
Blackwell, Oxford, United Kingdom
Volume :
50
Issue :
9
Pages :
3454-3471
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Physiology of dopaminergic neurons
Funders :
Fédération Wallonie Bruxelles. Fonds de la Recherche Scientifique - F.R.S.-FNRS
Available on ORBi :
since 12 June 2019

Statistics


Number of views
83 (7 by ULiège)
Number of downloads
1 (1 by ULiège)

Scopus citations®
 
5
Scopus citations®
without self-citations
4
OpenCitations
 
5

Bibliography


Similar publications



Contact ORBi