Research subject

Our lab examines the neuronal mechanisms that control the synaptic and cellular function of the « extended basal ganglia network » (EBG). The EBG neuronal network is composed of an assembly of interconnected limbic and motor nuclei that are crucial for physiological functions (voluntary movements, associative learning, natural seeking and stress) and neurological and psychiatric disorders such as Parkinson’s disease, addiction and anxiety. The brain structures, which compose the EBG, regulate dopamine neurons or use dopamine as a neurotransmitter. The circuit includes the dopamine-containing neurons of the ventral tegmental area (VTA) and substantia nigra pars compacta, the basal ganglia, the motor cortex, the bed nucleus of the stria terminalis (BNST), the tail of the VTA and the ventral subiculum.

The goal of our research is to provide the foundation for the rational development of therapies to treat the symptoms of dopamine-associated neurological and psychiatric disorders. We especially study how synaptic transmission and plasticity are controlled by dopamine within the EBG. Our research is developed around two aims:

  • To examine the neuronal mechanisms that controls the synaptic and cellular function of dopamine neurons.
  • To determine how dopamine changes the rules of neuronal communication in physiological and pathological conditions.

We study these cellular and circuit processes using multiple experimental approaches including ex vivo and in vivo electrophysiology combined with single-cell labeling, immunohistochemistry and neuronal tracing, neuropharmacology and viral mediated gene delivery including optogenetics.

Over the past, we identified cellular and synaptic alterations related to dopamine in the basal ganglia network and dysregulation of dopamine neurons excitability related to adaptations in the limbic circuit. Our group has recently contributed to demonstrate that:

  • other basal nuclei, in addition of the striatum, receive a functional dopaminergic innervation, suggesting that dopamine-dependent alterations within the extra-striatal network could also contribute to Parkinson’s disease.
  • in vivo homeostatic plasticity in the BNST triggers hyperactivity in midbrain dopamine neuron and facilitates behavioral effect of cocaine. Thus, we have significantly contributed to demonstrate synaptic dysfunction in the basal ganglia and limbic network, in Parkinson’s disease and drug addiction.

Research axes

  • Characterization of the anatomical organization and the molecular and neuronal diversity in the extended basal ganglia network.
  • Identification of the neuronal assemblies and the cellular mechanisms that control the intrinsic and synaptic properties of dopamine neurons.
  • Studying how dopamine controls neuronal excitability, synaptic plasticity and network oscillation within the extended basal ganglia network.
  • Definition of the cellular and molecular bases involved in deep brain stimulation therapeutic action.

 

Complete bibliography >>>

Latest publications

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Criteria : Author : "Jerome,Baufreton; François,Georges", Publication type : "('ART')"
Number of occurrences founded : 42.

titre
Inhaling xenon ameliorates l -dopa-induced dyskinesia in experimental parkinsonism
auteur
Jérôme Baufreton, Tomislav Li, Qin Li, Steve Mcguire, Eduardo Martin Moraud, Gregory Porras, Shiqi Sun, Wai Kin D. Ko, Marine Chazalon, Stéphanie Morin, Elisabeth Normand, Géraldine Farjot, Aude Milet, Jan Pype, Elsa Pioli, Grégoire Courtine, Baptiste Bessière, Erwan Bezard
article
Movement Disorders, Wiley, 2018, 〈10.1002/mds.27404〉
identifiant
hal-01797158
titre
GAT-3 Dysfunction Generates Tonic Inhibition in External Globus Pallidus Neurons in Parkinsonian Rodents.
auteur
Marine Chazalon, Elena Paredes-Rodriguez, Stéphanie Morin, Audrey Martinez, Sofia Cristóvão-Ferreira, Sandra Vaz, Ana Sebastiao, Aude Panatier, Eric Boué-Grabot, Cristina Miguelez, Jérôme Baufreton
article
Cell Reports , Elsevier Inc, 2018, pp.1678-1690. 〈10.1016/j.celrep.2018.04.014〉
identifiant
hal-01797163
titre
Alteration of GABAergic neurotransmission in Huntington's disease
auteur
Maurice Garret, Zhuowei Du, Marine Chazalon, Yoon Cho, Jérôme Baufreton
article
CNS Neuroscience & Therapeutics, 2018, 24 (4), pp.292 - 300. 〈10.1111/cns.12826〉
identifiant
hal-01797167
titre
Aversive stimuli drive hypothalamus-to-habenula excitation to promote escape behavior
auteur
Salvatore Lecca, Frank Julius Meye, Massimo Trusel, Anna Tchenio, Julia Harris, Martin Karl Schwarz, Denis Burdakov, Francois Georges, Manuel Mameli
article
eLife, eLife Sciences Publication, 2017, 6, 〈10.7554/eLife.30697〉
identifiant
hal-01582967
titre
Involvement of the bed nucleus of the stria terminalis in L-Dopa induced dyskinesia.
auteur
Matthieu F Bastide, Christelle Glangetas, Evelyne Doudnikoff, Qin Li, Mathieu Bourdenx, Pierre-Olivier Fernagut, Éric C Dumont, François Georges, Erwan Bézard
article
Scientific Reports, Nature Publishing Group, 2017, 7 (1), pp.2348. 〈10.1038/s41598-017-02572-9〉
identifiant
hal-01537926