About this Research Topic

Background

Thyroid hormones role in development was first suggested in the 18th century when a relationship between goiter and cretinism was found by F.E. Fodere. But it was Rudolf Virchow work in the late 19th century with thyroidectomized animals that clearly demonstrated that goiter led to cretinism. This opened the door to the understanding of TH action on vertebrate development. However given the relative ease by which cretinism could be treated simply by eating animal thyroid gland or iodine supplementation, research into the action of TH on vertebrate development has been lagging. This was further enhanced by the complex biology of TH where, after production in the gland, entry, activation and binding of the TH to cognate receptors in target cells is highly regulated. Nonetheless, new scientific advances and technologies are now providing tools to dissect the developmental role of TH on vertebrate development, both embryonic and post-natal. The post-natal role of TH in vertebrate development is long known from anuran studies but less evidences exist from other vertebrates. Recently, new evidences show that TH constitute key developmental signal in embryonic development of vertebrates, especially in neural development, from humans to fish. This new evidences are corroborating long-standing observations that infants from mothers with impaired TH physiology presented changes in mental and cognitive indexes. Nonetheless, given that TH constitute integrative physiological signals in vertebrates a new scenario is emerging whereas TH seem to be important in the development and maturation of most organ systems in vertebrates during their different life transitions.

With this Research Topic we set to exploit in a series of manuscripts new advances establishing thyroid hormones as pivotal player in vertebrate development by providing a developmental as well as evolutionary picture to how these hormones action become so important in vertebrate development. Potential topics include, among others:

1. TH role in development of invertebrates
2. Amphioxus development and TH
3. Lamprey metamorphosis and TH
4. Teleost embryogenesis and maternal thyroid
5. Flatfish metamorphosis
6. TRs in amphibian metamorphosis
7. E. coqui direct development
8. Axolot development
9. Development of the HPT axis in vertebrates
10. TH role in avian development
11. TH in turtles/reptiles development
12. Human development and TH
13. Role of TH in amphibian neurogenesis
14. TH role in mammalian brain development/ neurogenesis
15. Eye development during amphibian metamorphosis
16. TH role in ears and eye development in mammals
17. TH role in amphibian gut development
18. TH role in mammalian gut development
19. Role of TH in amphibian tail regression
20. TH in bone development
21. Endocrine disruption of TH driven events
22. TR in development future perspective

This collection is the second volume of The Role of Thyroid Hormones in Vertebrate Development

Keywords: vertebrate, thyroid, goiter, thyroid gland, invertebrates

Important note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.

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