The cerebral cortex contains multiple hierarchically organized areas with distinctive cytoarchitectonical patterns, but the cellular mechanisms underlying the emergence of this diversity remain unclear. Here, we have quantitatively investigated the neuronal output of individual progenitor cells in the ventricular zone of the developing mouse neocortex using a combination of methods that together circumvent the biases and limitations of individual approaches. We found that individual cortical progenitor cells show a high degree of stochasticity and generate pyramidal cell lineages that adopt a wide range of laminar configurations. Mathematical modelling these lineage data suggests that a small number of progenitor cell populations, each generating pyramidal cells following different stochastic developmental programs, suffice to generate the heterogenous complement of pyramidal cell lineages that collectively build the complex cytoarchitecture of the neocortex.
We thank I. Andrew and S.E. Bae for excellent technical assistance, F. Gage for plasmids, and K. Nave (Nex-Cre) for mouse colonies. We thank members of the Marín and Rico laboratories for stimulating discussions and ideas. Our research on this topic is supported by grants from the European Research Council (ERC-2017-AdG 787355 to O.M and ERC2016-CoG 725780 to S.H.) and Wellcome Trust (103714MA) to O.M. L.L. was the recipient of an EMBO long-term postdoctoral fellowship, R.B. received support from FWF Lise-Meitner program (M 2416) and F.K.W. was supported by an EMBO postdoctoral fellowship and is currently a Marie Skłodowska-Curie Fellow from the European Commission under the H2020 Programme.
Llorca A, Ciceri G, Beattie RJ, et al. Heterogeneous progenitor cell behaviors underlie the assembly of neocortical cytoarchitecture. bioRxiv. doi:10.1101/494088
Llorca, A., Ciceri, G., Beattie, R. J., Wong, F. K., Diana, G., Serafeimidou, E., … Marín, O. (n.d.). Heterogeneous progenitor cell behaviors underlie the assembly of neocortical cytoarchitecture. bioRxiv. Cold Spring Harbor Laboratory. https://doi.org/10.1101/494088
Llorca, Alfredo, Gabriele Ciceri, Robert J Beattie, Fong K. Wong, Giovanni Diana, Eleni Serafeimidou, Marian Fernández-Otero, et al. “Heterogeneous Progenitor Cell Behaviors Underlie the Assembly of Neocortical Cytoarchitecture.” BioRxiv. Cold Spring Harbor Laboratory, n.d. https://doi.org/10.1101/494088.
A. Llorca et al., “Heterogeneous progenitor cell behaviors underlie the assembly of neocortical cytoarchitecture,” bioRxiv. Cold Spring Harbor Laboratory.
Llorca A, Ciceri G, Beattie RJ, Wong FK, Diana G, Serafeimidou E, Fernández-Otero M, Streicher C, Arnold SJ, Meyer M, Hippenmeyer S, Maravall M, Marín O. Heterogeneous progenitor cell behaviors underlie the assembly of neocortical cytoarchitecture. bioRxiv, 10.1101/494088.
Llorca, Alfredo, et al. “Heterogeneous Progenitor Cell Behaviors Underlie the Assembly of Neocortical Cytoarchitecture.” BioRxiv, Cold Spring Harbor Laboratory, doi:10.1101/494088.