Genetic basis of hindlimb loss in a naturally occurring vertebrate model

Emily K Don, Tanya A de Jong-Curtain, Karen Doggett, Thomas E Hall, Benjamin Heng, Andrew P Badrock, Claire Winnick, Garth A Nicholson, Gilles J Guillemin, Peter D Currie, Daniel Hesselson, Joan K Heath, Nicholas J Cole

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Abstract

Here we genetically characterise pelvic finless, a naturally occurring model of hindlimb loss in zebrafish that lacks pelvic fin structures, which are homologous to tetrapod hindlimbs, but displays no other abnormalities. Using a hybrid positional cloning and next generation sequencing approach, we identified mutations in the nuclear localisation signal (NLS) of T-box transcription factor 4 (Tbx4) that impair nuclear localisation of the protein, resulting in altered gene expression patterns during pelvic fin development and the failure of pelvic fin development. Using a TALEN-induced tbx4 knockout allele we confirm that mutations within the Tbx4 NLS (A78V; G79A) are sufficient to disrupt pelvic fin development. By combining histological, genetic, and cellular approaches we show that the hindlimb initiation gene tbx4 has an evolutionarily conserved, essential role in pelvic fin development. In addition, our novel viable model of hindlimb deficiency is likely to facilitate the elucidation of the detailed molecular mechanisms through which Tbx4 functions during pelvic fin and hindlimb development.
Original languageEnglish
Pages (from-to)359-366
Number of pages8
JournalBiology Open
Volume5
Issue number3
DOIs
Publication statusPublished - 2016

Keywords

  • pelvic fin
  • development
  • TALENs
  • Hindlimb
  • Tbx4

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