D-Serine agonism of GluN1-GluN3 NMDA receptors regulates the activity of enteric neurons and coordinates gut motility
2024
Osorio, Nancy | Martineau, Magalie | Fortea, Marina | Rouget, Céline | Penalba, Virginie | Lee, Cindy, J | Boesmans, Werend | Rolli-Derkinderen, Malvyne | Patel, Amit, V | Mondielli, Grégoire | Conrod, Sandrine | Labat-Gest, Vivien | Papin, Amandine | Sasabe, Jumpei | Sweedler, Jonathan, V | Berghe, Pieter Vanden | Delmas, Patrick | Mothet, Jean-Pierre | Centre recherche en CardioVasculaire et Nutrition = Center for CardioVascular and Nutrition research (C2VN) ; Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | The Enteric Nervous System in gut and brain disorders [U1235] (TENS) ; Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE) ; Université de Nantes (UN)-Université de Nantes (UN) | Marseille medical genetics - Centre de génétique médicale de Marseille (MMG) ; Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM) | Institut Marseille Maladies Rares (MarMaRa) ; Aix Marseille Université (AMU)
International audience
اظهر المزيد [+] اقل [-]إنجليزي. The enteric nervous system (ENS) is a complex network of diverse molecularly defined classes of neurons embedded in the gastrointestinal wall and responsible for controlling the major functions of the gut. As in the central nervous system, the vast array of ENS neurons is interconnected by chemical synapses. Despite several studies reporting the expression of ionotropic glutamate receptors in the ENS, their roles in the gut remain elusive. Here, by using an array of immunohistochemistry, molecular profiling and functional assays, we uncover a new role for D-serine (D-Ser) and non-conventional GluN1-GluN3 N-methyl D-aspartate receptors (NMDARs) in regulating ENS functions. We demonstrate that D-Ser is produced by serine racemase (SR) expressed in enteric neurons. By using both in situ patch clamp recording and calcium imaging, we show that D-Ser alone acts as an excitatory neurotransmitter in the ENS independently of the conventional GluN1-GluN2 NMDARs. Instead, D-Ser directly gates the non-conventional GluN1-GluN3 NMDARs in enteric neurons from both mouse and guinea-pig. Pharmacological inhibition or potentiation of GluN1-GluN3 NMDARs had opposite effects on mouse colonic motor activities, while genetically driven loss of SR impairs gut transit and fluid content of pellet output. Our results demonstrate the existence of native GluN1-GluN3 NMDARs in enteric neurons and open new perspectives on the exploration of excitatory D-Ser receptors in gut function and diseases.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Institut national de la recherche agronomique