1. GLI3 Is Required for OLIG2+ Progeny Production in Adult Dorsal Neural Stem Cells
- Author
-
Rebecca J. Embalabala, Asa A. Brockman, Amanda R. Jurewicz, Jennifer A. Kong, Kaitlyn Ryan, Cristina D. Guinto, Arturo Álvarez-Buylla, Chin Chiang, and Rebecca A. Ihrie
- Subjects
animal structures ,QH301-705.5 ,Cells ,1.1 Normal biological development and functioning ,animal diseases ,radial glial cells ,adult neural stem cells ,ventricular-subventricular zone ,oligodendrocytes ,Nerve Tissue Proteins ,ventricular–subventricular zone ,Gli3 ,Regenerative Medicine ,Sonic hedgehog (Shh) ,Mice ,Neural Stem Cells ,Underpinning research ,Interneurons ,Zinc Finger Protein Gli3 ,Lateral Ventricles ,Animals ,Biology (General) ,Cells, Cultured ,Smoothened ,Cultured ,Brief Report ,Neurosciences ,Sonic hedgehog ,Cell Differentiation ,General Medicine ,Oligodendrocyte Transcription Factor 2 ,ventricular–subventricular zone (V-SVZ) ,Stem Cell Research ,Smoothened Receptor ,Smoothened (SMO) ,Adult Stem Cells ,neurogenesis ,nervous system ,Neurological ,embryonic structures ,gliogenesis ,Stem Cell Research - Nonembryonic - Non-Human - Abstract
The ventricular–subventricular zone (V-SVZ) is a postnatal germinal niche. It holds a large population of neural stem cells (NSCs) that generate neurons and oligodendrocytes for the olfactory bulb and (primarily) the corpus callosum, respectively. These NSCs are heterogeneous and generate different types of neurons depending on their location. Positional identity among NSCs is thought to be controlled in part by intrinsic pathways. However, extrinsic cell signaling through the secreted ligand Sonic hedgehog (Shh) is essential for neurogenesis in both the dorsal and ventral V-SVZ. Here we used a genetic approach to investigate the role of the transcription factors GLI2 and GLI3 in the proliferation and cell fate of dorsal and ventral V-SVZ NSCs. We find that while GLI3 is expressed in stem cell cultures from both dorsal and ventral V-SVZ, the repressor form of GLI3 is more abundant in dorsal V-SVZ. Despite this high dorsal expression and the requirement for other Shh pathway members, GLI3 loss affects the generation of ventrally-, but not dorsally-derived olfactory interneurons in vivo and does not affect trilineage differentiation in vitro. However, loss of GLI3 in the adult dorsal V-SVZ in vivo results in decreased numbers of OLIG2-expressing progeny, indicating a role in gliogenesis.
- Published
- 2021