A tissue-specific role for intraflagellar transport genes during craniofacial development

PLoS One. 2017 Mar 27;12(3):e0174206. doi: 10.1371/journal.pone.0174206. eCollection 2017.

Abstract

Primary cilia are nearly ubiquitous, cellular projections that function to transduce molecular signals during development. Loss of functional primary cilia has a particularly profound effect on the developing craniofacial complex, causing several anomalies including craniosynostosis, micrognathia, midfacial dysplasia, cleft lip/palate and oral/dental defects. Development of the craniofacial complex is an intricate process that requires interactions between several different tissues including neural crest cells, neuroectoderm and surface ectoderm. To understand the tissue-specific requirements for primary cilia during craniofacial development we conditionally deleted three separate intraflagellar transport genes, Kif3a, Ift88 and Ttc21b with three distinct drivers, Wnt1-Cre, Crect and AP2-Cre which drive recombination in neural crest, surface ectoderm alone, and neural crest, surface ectoderm and neuroectoderm, respectively. We found that tissue-specific conditional loss of ciliary genes with different functions produces profoundly different facial phenotypes. Furthermore, analysis of basic cellular behaviors in these mutants suggests that loss of primary cilia in a distinct tissue has unique effects on development of adjacent tissues. Together, these data suggest specific spatiotemporal roles for intraflagellar transport genes and the primary cilium during craniofacial development.

MeSH terms

  • Adaptor Proteins, Signal Transducing / genetics
  • Animals
  • Cilia / genetics
  • Craniofacial Abnormalities / genetics*
  • Face / abnormalities
  • Face / embryology*
  • Female
  • Gene Deletion
  • Gene Expression Regulation, Developmental*
  • Kinesins / genetics
  • Male
  • Mice
  • Neural Crest / embryology
  • Neural Crest / metabolism
  • Neural Plate / embryology
  • Neural Plate / metabolism
  • Skull / abnormalities
  • Skull / embryology*
  • Skull / metabolism
  • Tumor Suppressor Proteins / genetics

Substances

  • Adaptor Proteins, Signal Transducing
  • Kif3a protein, mouse
  • Tg737Rpw protein, mouse
  • Ttc21b protein, mouse
  • Tumor Suppressor Proteins
  • Kinesins