Mutual repression between Pax3 and Pax6 is involved in the positioning of ophthalmic trigeminal placode in avian embryo

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Cranial sense organs and a subset of cranial sensory neurons are generated from placodes, thickenings of the ectoderm. Pax3 has been known as a marker for ophthalmic trigeminal placode specification, and also an important regulator of trigeminal placode neuron differentiation. In this study, I show that Pax6 is initially expressed in the preplacodal region at the level of ophthalmic trigeminal placode, and that this expression gradually regresses in a medial-to-lateral direction as Pax3 expression expands in the same direction. Misexpression studies revealed that Pax6 represses Pax3 expression indirectly as a transcriptional activator in a cell-autonomous manner. Pax3-misexpression represses Pax6 expression in an indirect fashion, suggesting that unknown factor(s) downstream of Pax3 may repress Pax6 expression, and thereby allow an expansion of Pax3-positive ophthalmic trigeminal placode region. These results indicate that the mutual repression between Pax3 and Pax6 has important roles in the specification and the positioning of the ophthalmic trigeminal placode.

Original languageEnglish
Pages (from-to)994-1003
Number of pages10
JournalDevelopment Growth and Differentiation
Volume53
Issue number9
DOIs
Publication statusPublished - 2011 Dec

Keywords

  • Pax3
  • Pax6
  • Placode
  • Trigeminal

ASJC Scopus subject areas

  • Developmental Biology
  • Cell Biology

Fingerprint Dive into the research topics of 'Mutual repression between Pax3 and Pax6 is involved in the positioning of ophthalmic trigeminal placode in avian embryo'. Together they form a unique fingerprint.

Cite this