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St18 specifies globus pallidus projection neuron identity in MGE lineage

Author

Listed:
  • Luke F. Nunnelly

    (Columbia University Irving Medical Center)

  • Melissa Campbell

    (Columbia University Irving Medical Center)

  • Dylan I. Lee

    (Columbia University Irving Medical Center)

  • Patrick Dummer

    (Columbia University Irving Medical Center)

  • Guoqiang Gu

    (Vanderbilt University School of Medicine)

  • Vilas Menon

    (Columbia University Irving Medical Center)

  • Edmund Au

    (Columbia University Irving Medical Center
    Columbia University Irving Medical Center
    Columbia University Irving Medical Center)

Abstract

The medial ganglionic eminence (MGE) produces both locally-projecting interneurons, which migrate long distances to structures such as the cortex as well as projection neurons that occupy subcortical nuclei. Little is known about what regulates the migratory behavior and axonal projections of these two broad classes of neurons. We find that St18 regulates the migration and morphology of MGE neurons in vitro. Further, genetic loss-of-function of St18 in mice reveals a reduction in projection neurons of the globus pallidus pars externa. St18 functions by influencing cell fate in MGE lineages as we observe a large expansion of nascent cortical interneurons at the expense of putative GPe neurons in St18 null embryos. Downstream of St18, we identified Cbx7, a component of Polycomb repressor complex 1, and find that it is essential for projection neuron-like migration but not morphology. Thus, we identify St18 as a key regulator of projection neuron vs. interneuron identity.

Suggested Citation

  • Luke F. Nunnelly & Melissa Campbell & Dylan I. Lee & Patrick Dummer & Guoqiang Gu & Vilas Menon & Edmund Au, 2022. "St18 specifies globus pallidus projection neuron identity in MGE lineage," Nature Communications, Nature, vol. 13(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35518-5
    DOI: 10.1038/s41467-022-35518-5
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