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Asymmetric localization of DLC1 defines avian trunk neural crest polarity for directional delamination and migration

Author

Listed:
  • Jessica Aijia Liu

    (The University of Hong Kong)

  • Yanxia Rao

    (The University of Hong Kong)

  • May Pui Lai Cheung

    (The University of Hong Kong)

  • Man-Ning Hui

    (The University of Hong Kong)

  • Ming-Hoi Wu

    (The University of Hong Kong)

  • Lo-Kong Chan

    (The University of Hong Kong)

  • Irene Oi-Lin Ng

    (The University of Hong Kong)

  • Ben Niu

    (The University of Hong Kong)

  • Kathryn S. E. Cheah

    (The University of Hong Kong)

  • Rakesh Sharma

    (The University of Hong Kong)

  • Louis Hodgson

    (Albert Einstein College of Medicine)

  • Martin Cheung

    (The University of Hong Kong)

Abstract

Following epithelial-mesenchymal transition, acquisition of avian trunk neural crest cell (NCC) polarity is prerequisite for directional delamination and migration, which in turn is essential for peripheral nervous system development. However, how this cell polarization is established and regulated remains unknown. Here we demonstrate that, using the RHOA biosensor in vivo and in vitro, the initiation of NCC polarization is accompanied by highly activated RHOA in the cytoplasm at the cell rear and its fluctuating activity at the front edge. This differential RHOA activity determines polarized NC morphology and motility, and is regulated by the asymmetrically localized RhoGAP Deleted in liver cancer (DLC1) in the cytoplasm at the cell front. Importantly, the association of DLC1 with NEDD9 is crucial for its asymmetric localization and differential RHOA activity. Moreover, NC specifiers, SOX9 and SOX10, regulate NEDD9 and DLC1 expression, respectively. These results present a SOX9/SOX10-NEDD9/DLC1-RHOA regulatory axis to govern NCC migratory polarization.

Suggested Citation

  • Jessica Aijia Liu & Yanxia Rao & May Pui Lai Cheung & Man-Ning Hui & Ming-Hoi Wu & Lo-Kong Chan & Irene Oi-Lin Ng & Ben Niu & Kathryn S. E. Cheah & Rakesh Sharma & Louis Hodgson & Martin Cheung, 2017. "Asymmetric localization of DLC1 defines avian trunk neural crest polarity for directional delamination and migration," Nature Communications, Nature, vol. 8(1), pages 1-17, December.
  • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01107-0
    DOI: 10.1038/s41467-017-01107-0
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