Sonic Hedgehog Signaling Agonist (SAG) Triggers BDNF Secretion and Promotes the Maturation of GABAergic Networks in the Postnatal Rat Hippocampus.

Autor:	Delmotte Q; Aix-Marseille Univ, Marseille, France.; INSERM (Institut National de la Santé et de la Recherche Médicale) Unité 1249, Marseille, France.; INMED (Institut de Neurobiologie de la Méditerranée), Parc Scientifique de Luminy, Marseille, France., Diabira D; INSERM (Institut National de la Santé et de la Recherche Médicale) Unité 1249, Marseille, France.; INMED (Institut de Neurobiologie de la Méditerranée), Parc Scientifique de Luminy, Marseille, France., Belaidouni Y; Aix-Marseille Univ, Marseille, France.; INSERM (Institut National de la Santé et de la Recherche Médicale) Unité 1249, Marseille, France.; INMED (Institut de Neurobiologie de la Méditerranée), Parc Scientifique de Luminy, Marseille, France., Hamze M; Aix-Marseille Univ, Marseille, France.; INSERM (Institut National de la Santé et de la Recherche Médicale) Unité 1249, Marseille, France.; INMED (Institut de Neurobiologie de la Méditerranée), Parc Scientifique de Luminy, Marseille, France., Kochmann M; Aix-Marseille Univ, Marseille, France.; Institut des Neurosciences de La Timone, Marseille, France., Montheil A; Aix-Marseille Univ, Marseille, France.; INSERM (Institut National de la Santé et de la Recherche Médicale) Unité 1249, Marseille, France.; INMED (Institut de Neurobiologie de la Méditerranée), Parc Scientifique de Luminy, Marseille, France., Gaiarsa JL; Aix-Marseille Univ, Marseille, France.; INSERM (Institut National de la Santé et de la Recherche Médicale) Unité 1249, Marseille, France.; INMED (Institut de Neurobiologie de la Méditerranée), Parc Scientifique de Luminy, Marseille, France., Porcher C; Aix-Marseille Univ, Marseille, France.; INSERM (Institut National de la Santé et de la Recherche Médicale) Unité 1249, Marseille, France.; INMED (Institut de Neurobiologie de la Méditerranée), Parc Scientifique de Luminy, Marseille, France., Belgacem YH; INSERM (Institut National de la Santé et de la Recherche Médicale) Unité 1249, Marseille, France.; INMED (Institut de Neurobiologie de la Méditerranée), Parc Scientifique de Luminy, Marseille, France.
Jazyk:	angličtina
Zdroj:	Frontiers in cellular neuroscience [Front Cell Neurosci] 2020 Apr 23; Vol. 14, pp. 98. Date of Electronic Publication: 2020 Apr 23 (Print Publication: 2020).
DOI:	10.3389/fncel.2020.00098
Abstrakt:	Sonic hedgehog (Shh) signaling plays critical roles during early central nervous system development, such as neural cell proliferation, patterning of the neural tube and neuronal differentiation. While Shh signaling is still present in the postnatal brain, the roles it may play are, however, largely unknown. In particular, Shh signaling components are found at the synaptic junction in the maturing hippocampus during the first two postnatal weeks. This period is characterized by the presence of ongoing spontaneous synaptic activity at the cellular and network levels thought to play important roles in the onset of neuronal circuit formation and synaptic plasticity. Here, we demonstrate that non-canonical Shh signaling increases the frequency of the synchronized electrical activity called Giant Depolarizing Potentials (GDP) and enhances spontaneous GABA post-synaptic currents in the rodent hippocampus during the early postnatal period. This effect is mediated specifically through the Shh co-receptor Smoothened via intracellular Ca 2+ signal and the activation of the BDNF-TrkB signaling pathway. Given the importance of these spontaneous events on neuronal network maturation and refinement, this study opens new perspectives for Shh signaling on the control of early stages of postnatal brain maturation and physiology. (Copyright © 2020 Delmotte, Diabira, Belaidouni, Hamze, Kochmann, Montheil, Gaiarsa, Porcher and Belgacem.)
Databáze:	MEDLINE
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