Related Experiment Video

Updated: Jul 16, 2026

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
09:32

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Published on: June 15, 2017

Inca: a novel p21-activated kinase-associated protein required for cranial neural crest development

Ting Luo1, Yanhua Xu, Trevor L Hoffman

  • 1Laboratory of Molecular Genetics, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.

Development (Cambridge, England)
|February 23, 2007
PubMed

Insights

Inca, a novel protein, is crucial for craniofacial cartilage development by regulating neural crest cell condensation. It interacts with PAK5 to control cytoskeletal organization and cell adhesion.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Neural crest (NC) cells are vital for craniofacial development.
  • The regulation of NC cell migration, condensation, and differentiation is complex.
  • Novel proteins involved in these processes are continuously being identified.

Purpose of the Study:

  • To identify and characterize a novel protein, Inca, involved in neural crest development.
  • To elucidate the function of Inca in craniofacial cartilage formation.
  • To investigate the molecular interactions of Inca within the cellular context.

Main Methods:

  • Microarray screening to identify upregulated genes in Xenopus embryos.
  • Antisense morpholino knockdown experiments in Xenopus and zebrafish.
  • Overexpression studies to assess Inca's impact on cellular structures.
  • Co-immunoprecipitation to identify interacting proteins, specifically PAK5.

Main Results:

  • Inca is conserved across vertebrates and expressed in premigratory and migrating neural crest cells.
  • Inca knockdown impairs craniofacial cartilage formation by affecting cell condensation, not migration.
  • Inca overexpression disrupts actin cytoskeleton organization and wound healing.
  • Inca physically interacts with p21-activated kinase 5 (PAK5).

Conclusions:

  • Inca plays an essential role in the condensation of neural crest cells for craniofacial cartilage development.
  • Inca and PAK5 cooperate to regulate cytoskeletal organization and cell adhesion in the early embryo and neural crest cells.
  • This study reveals a novel mechanism for controlling cell behavior during embryonic development.

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