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Sole head transcriptomics reveals a coordinated developmental program during metamorphosis.

Bruno Louro1, João Pedro Marques1, Manuel Manchado2

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This summary is machine-generated.

Thyroid hormones (THs) orchestrate the dramatic metamorphosis in flatfish, driving eye migration and head asymmetry. This study deciphers the genetic pathways, revealing conserved mechanisms across flatfish species.

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Area of Science:

  • Developmental Biology
  • Genomics
  • Endocrinology

Background:

  • Teleost metamorphosis involves thyroid hormone (TH)-regulated transitions.
  • Pleuronectiformes (flatfish) exhibit extreme metamorphosis, including asymmetric head development and eye migration.
  • Understanding the genetic basis of this dramatic developmental change is crucial.

Purpose of the Study:

  • To investigate the genetic mechanisms underlying the metamorphosis of the flatfish head.
  • To identify the role of thyroid hormones in regulating this process.
  • To generate a transcriptome of the metamorphosing Solea senegalensis head.

Main Methods:

  • Transcriptome sequencing of the Solea senegalensis head during metamorphosis.
  • Analysis of gene expression patterns.
  • Comparative genomics to assess conservation.

Main Results:

  • Thyroid hormones act as integrative factors, directing a stepwise genetic program.
  • Distinct organismal and cell-specific responses are initiated by THs.
  • The study identified key genes involved in asymmetric head development.

Conclusions:

  • THs are central regulators of flatfish head metamorphosis, orchestrating both broad and specific cellular changes.
  • The genetic mechanisms driving asymmetric development and TH dependency are conserved in flatfish.
  • Findings in Solea senegalensis provide insights representative of the entire flatfish order.