PUBLICATION
Thyroid hormone shapes craniofacial bones during postembryonic zebrafish development
- Authors
- Keer, S., Storch, J.D., Nguyen, S., Prado, M., Singh, R., Hernandez, L.P., McMenamin, S.K.
- ID
- ZDB-PUB-220326-22
- Date
- 2022
- Source
- Evolution & development 24(1-2): 61-76 (Journal)
- Registered Authors
- Keywords
- craniofacial skeleton, development, geometric morphometrics, thyroid hormone, zebrafish
- MeSH Terms
-
- Jaw/physiology
- Zebrafish*
- Larva/metabolism
- Thyroid Hormones*/metabolism
- Animals
- Bone and Bones
- PubMed
- 35334153 Full text @ Evol. Dev.
Citation
Keer, S., Storch, J.D., Nguyen, S., Prado, M., Singh, R., Hernandez, L.P., McMenamin, S.K. (2022) Thyroid hormone shapes craniofacial bones during postembryonic zebrafish development. Evolution & development. 24(1-2):61-76.
Abstract
Changing the shape of craniofacial bones can profoundly alter ecological function, and understanding how developmental conditions sculpt skeletal phenotypes can provide insight into evolutionary adaptations. Thyroid hormone (TH) stimulates metamorphosis and regulates skeletal morphogenesis across vertebrates. To assess the roles of this hormone in sculpting the craniofacial skeleton of a non-metamorphic vertebrate, we tested zebrafish for developmental periods of TH-induced craniofacial shape change. We analyzed shapes of specific bones that function in prey detection, capture and processing. We quantified these elements from late-larval through adult stages under three developmental TH profiles. Under wild-type conditions, each bone progressively grows allometrically into a mature morphology over the course of postembryonic development. In three of the four bones, TH was required to sculpt an adult shape: hypothyroidism inhibited aspects of shape change, and allowed some components of immature shape to be retained into adulthood. Excess developmental TH stimulated aspects of precocious shape change leading to abnormal morphologies in some bones. Skeletal features with functional importance showed high sensitivities to TH, including the transformator process of the tripus, the mandibular symphysis of the lower jaw, the scutiform lamina of the hyomandibula, and the anterior arm of the pharyngeal jaw. In all, we found that TH is necessary for shaping mature morphology of several essential skeletal elements; this requirement is particularly pronounced during larval development. Altered TH titer leads to abnormal morphologies with likely functional consequences, highlighting the potential of TH and downstream pathways as targets for evolutionary change.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping