Spatiomolecular Characterization of Dopamine D2 Receptors Cells in the Mouse External Globus Pallidus


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Abstract

The external globus pallidus (GPe) is part of the basal ganglia circuit and plays a key role in controlling the actions. Although, many evidence indicate that dopamine through its activation of dopamine D2 receptors (D2Rs) modulates the GPe neuronal activity, the precise spatiomolecular characterization of cell populations expressing D2Rs in the mouse GPe is still lacking. By combining single molecule in situ hybridization, cell type-specific imaging analyses, and electrophysiology slice recordings, we found that GPe D2R cells are neurons preferentially localized in the caudal portion of GPe. These neurons comprising pallido-striatal, pallido-nigral, and pallido-cortical neurons segregate into two distinct populations displaying molecular and electrophysiological features of GPe GABAergic PV/NKX2.1 and cholinergic neurons respectively. By clarifying the spatial molecular identity of GPe D2R neurons in the mouse, this work provides the basis for future studies aiming at disentangling the action of dopamine within the GPe.

About the authors

Julie Espallergues

IGF, University Montpellie

Email: info@benthamscience.net

Jihane Boubaker-Vitre

1IGF, University Montpellier

Email: info@benthamscience.net

Audrey Mignon

, University Montpellier

Email: info@benthamscience.net

Maelle Avrillon

IGF, University Montpellier

Email: info@benthamscience.net

Morgane Bon-Jego

, University Bordeaux

Email: info@benthamscience.net

Jerome Baufreton

, University Bordeaux

Email: info@benthamscience.net

Emmanuel Valjent

IGF, University Montpellier

Author for correspondence.
Email: info@benthamscience.net

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