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A developmental switch induced by thyroid hormone: Xenopus laevis metamorphosis
1Section of Neurobiology, Physiology, and Behavior, University of California-Davis, One Shields Avenue, Davis, CA 95616-8519, USA. jdfurlow@ucdavis.edu
Trends in Endocrinology and Metabolism: TEM
|February 9, 2006
Summary
Thyroid hormone triggers complete metamorphosis in anuran tadpoles, transforming them into frogs. This dramatic vertebrate hormonal effect is studied in Xenopus using advanced molecular tools to understand tissue specificity and timing.
Area of Science:
- Developmental biology
- Endocrinology
- Comparative physiology
Background:
- Anuran metamorphosis is a dramatic, hormone-induced transformation in vertebrates.
- Thyroid hormone is the key regulator of this process.
- The frog Xenopus laevis is a model organism for studying vertebrate development.
Purpose of the Study:
- To explore the role of thyroid hormone in vertebrate development.
- To understand the molecular mechanisms underlying anuran metamorphosis.
- To investigate key remaining problems in metamorphosis research.
Main Methods:
- Utilizing advances in pharmacology and molecular biology.
- Employing a straightforward transgenesis assay in Xenopus laevis.
- Leveraging the near-complete Xenopus tropicalis genome.
Main Results:
- Significant advances in understanding metamorphosis.
- Enabling detailed study of tissue-specific hormone responses.
- Facilitating research into the precise timing of morphological changes.
Conclusions:
- Xenopus metamorphosis is a powerful model for studying thyroid hormone action in vertebrates.
- Ongoing research addresses cell autonomy and developmental competence.
- This process offers unique insights into hormonal regulation of development.