Alexandre Mourot

Nov 12, 2024 | nature.com | Jeremie Naude |Sarah Mondoloni |Alexandre Mourot |Philippe Faure

AbstractPhasic variations in dopamine levels are interpreted as a teaching signal reinforcing rewarded behaviors. However, behavior also depends on the motivational, neuromodulatory effect of phasic dopamine. In this study, we reveal a neurodynamical principle that unifies these roles in a recurrent network-based decision architecture embodied through an action-perception loop with the task space, the MAGNet model.

Oct 17, 2024 | nature.com | Lauren Reynolds |Daiana Rigoni |Claire Nguyen |Tinaig Le Borgne |Clara Franco |Fabio Marti | +4 more

AbstractHow nicotine acts on developing neurocircuitry in adolescence to promote later addiction vulnerability remains largely unknown, but may hold the key for informing more effective intervention efforts. We found transient nicotine exposure in early adolescent (PND 21-28) male mice was sufficient to produce a marked vulnerability to nicotine in adulthood (PND 60 + ), associated with disrupted functional connectivity in dopaminergic circuits.

Jul 6, 2024 | nature.com | Mathieu Favier |Elena Garcia |Elena García |Fiona Henderson |Veronique BERNARD |Yulong Li | +5 more

AbstractCholinergic striatal interneurons (ChIs) express the vesicular glutamate transporter 3 (VGLUT3) which allows them to regulate the striatal network with glutamate and acetylcholine (ACh). In addition, VGLUT3-dependent glutamate increases ACh vesicular stores through vesicular synergy. A missense polymorphism, VGLUT3-p.T8I, was identified in patients with substance use disorders (SUDs) and eating disorders (EDs).

Jul 6, 2024 | nature.com | Mathieu Favier |Elena Garcia |Elena García |Fiona Henderson |Veronique BERNARD |Yulong Li | +5 more

AbstractCholinergic striatal interneurons (ChIs) express the vesicular glutamate transporter 3 (VGLUT3) which allows them to regulate the striatal network with glutamate and acetylcholine (ACh). In addition, VGLUT3-dependent glutamate increases ACh vesicular stores through vesicular synergy. A missense polymorphism, VGLUT3-p.T8I, was identified in patients with substance use disorders (SUDs) and eating disorders (EDs).