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Ascidian tail formation requires caudal function.

Y Katsuyama1, Y Sato, S Wada

  • 1Laboratory of Molecular Neurobiology, NIBH, Higashi 1-1, Tsukuba, 305-8566, Japan.

Developmental Biology
|September 10, 1999
PubMed
Summary
This summary is machine-generated.

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The study investigated the caudal gene

Area of Science:

  • Developmental biology
  • Evolutionary biology
  • Molecular genetics

Background:

  • The evolutionary origins of the chordate tail remain unclear.
  • Understanding the molecular mechanisms of tail formation is crucial for chordate evolution.

Purpose of the Study:

  • To investigate the function and evolutionary role of the caudal gene in chordate tail formation.
  • To explore the conserved function of caudal genes across different chordate species.

Main Methods:

  • Isolation and characterization of the ascidian caudal gene.
  • Gene expression analysis during ascidian embryogenesis.
  • Functional studies using antisense oligonucleotides and dominant-negative constructs.
  • Xenopus embryo microinjection experiments.

Related Experiment Videos

Main Results:

  • Ascidian caudal is expressed in the ectoderm of the tail-forming region.
  • Caudal gene suppression inhibits posterior cell movement essential for tail formation.
  • Overexpression of caudal mRNA induces elongation in ascidian explants.
  • Inhibition of ascidian caudal function in Xenopus embryos disrupts embryonic elongation.

Conclusions:

  • Caudal gene function is essential for chordate tail formation.
  • The caudal gene plays a conserved role in tail development across chordates.
  • Caudal gene evolution likely contributed to the development of the chordate tail.