Fate restrictions in embryonic neural progenitors.
2021
The vertebrate central nervous system (CNS) is a fantastically complex organ composed of dozens of cell types within the neural and glial lineages. Its organization is laid down during development, through the localized and sequential production of subsets of neurons with specific identities. The principles and mechanisms that underlie the timely production of adequate classes of cells are only partially understood. Recent advances in molecular profiling describe the developmental trajectories leading to this amazing cellular diversity and provide us with cell atlases of an unprecedented level of precision. Yet, some long-standing questions pertaining to lineage relationships between neural progenitor cells and their differentiated progeny remain unanswered. Here, we discuss questions related to proliferation potential, timing of fate choices and restriction of neuronal output potential of individual CNS progenitors through the lens of lineage relationship. Unlocking methodological barriers will be essential to accurately describe CNS development at a cellular resolution.
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