RNA Profiling of the Human and Mouse Spinal Cord Stem Cell Niches Reveals an Embryonic-like Regionalization with MSX1+ Roof-Plate-Derived Cells

Hussein Ghazale (1, 2) , Chantal Ripoll (2, 1) , Nicolas Leventoux (1, 2) , Laurent Jacob (3, 4) , Safa Azar (2, 1) , Daria Mamaeva (1, 2) , Yael Glasson (2, 1) , Charles-Félix Calvo (5) , Jean-Léon Thomas (4, 6, 3) , Sarah Meneceur (7, 8) , Yvan Lallemand (7, 8) , Valérie Rigau (2, 1, 9) , Florence Perrin (10) , Harun Noristani (10) , Brenda Rocamonde (4, 3) , Emmanuelle Huillard (4, 3) , Luc Bauchet (2, 1, 9) , Jean-Philippe Hugnot (2, 1, 10)

1 CHRU Montpellier - Hôpital Saint Eloi
2 INM - Institut des Neurosciences de Montpellier
3 SU - Sorbonne Université
4 ICM - Institut du Cerveau = Paris Brain Institute
5 CIRB - Centre interdisciplinaire de recherche en biologie
6 YSM - Yale School of Medicine [New Haven, Connecticut]
7 IP - Institut Pasteur [Paris]
8 Cellules Souches et Développement / Stem Cells and Development
9 CHU Montpellier
10 UM - Université de Montpellier

Anamniotes, rodents, and young humans maintain neural stem cells in the ependymal zone (EZ) around the central canal of the spinal cord, representing a possible endogenous source for repair in mammalian lesions. Cell diversity and genes specific for this region are ill defined. A cellular and molecular resource is provided here for the mouse and human EZ based on RNA profiling, immunostaining, and fluorescent transgenic mice. This uncovered the conserved expression of 1,200 genes including 120 transcription factors. Unexpectedly the EZ maintains an embryonic-like dorsal-ventral pattern of expression of spinal cord developmental transcription factors (ARX, FOXA2, MSX1, and PAX6). In mice, dorsal and ventral EZ cells express Vegfr3 and are derived from the embryonic roof and floor plates. The dorsal EZ expresses a high level of Bmp6 and Gdf10 genes and harbors a subpopulation of radial quiescent cells expressing MSX1 and ID4 transcription factors.

Mots clés: neural stem cells; roof plate; spinal cord; transcription factors; floor plate; ependymal cells; ependyma; Msx1; radial glial cells; regionalization; niche

Domaines: Neurobiologie; Génomique, Transcriptomique et Protéomique [q-bio.GN]

Hussein Ghazale, Chantal Ripoll, Nicolas Leventoux, Laurent Jacob, Safa Azar, et al.. RNA Profiling of the Human and Mouse Spinal Cord Stem Cell Niches Reveals an Embryonic-like Regionalization with MSX1+ Roof-Plate-Derived Cells. Stem Cell Reports, 2019, 12 (5), pp.1159-1177. ⟨10.1016/j.stemcr.2019.04.001⟩. ⟨hal-02122271⟩