Related Experiment Videos
Alterations in the incisor development in the Tabby mouse.
S Miard1, R Peterková, J L Vonesch
1INSERM U424, Institut de Biologie Médicale, Faculté de Médecine, Strasbourg, France.
The International Journal of Developmental Biology
|December 28, 1999
Summary
The X-linked tabby (Ta) mutation in mice, similar to human hypohidrotic ectodermal dysplasia (HED), significantly disrupts lower incisor development, causing abnormal size, shape, and delayed differentiation.
Area of Science:
- Developmental Biology
- Genetics
- Oral Biology
Background:
- X-linked tabby (Ta) syndrome in mice is a model for human hypohidrotic ectodermal dysplasia (HED).
- Ta mice exhibit symptoms analogous to HED, including hair and tooth defects.
Purpose of the Study:
- To investigate the impact of the Ta mutation on the developmental processes of lower incisors in mice.
- To analyze the histological and morphological consequences of the Ta mutation on incisor development.
Main Methods:
- Histology
- Morphometry
- Computer-aided 3D reconstructions
- Comparative analysis between Ta mutant and wild-type (WT) mice.
Main Results:
- Ta mutation leads to significantly reduced incisor size (width and length) and abnormal tooth shape.
- Developmental alterations include changes in tissue proportion, retarded cytodifferentiation, and loss of asymmetry in the incisor.
- Enamel organ development is affected, with potential heterogeneity in growth between labial and lingual aspects.
Conclusions:
- The Ta mutation has profound effects on incisor development, extending beyond a simple delay.
- Observations suggest independent development of the labial and lingual portions of the cervical loop.
- Ta syndrome provides insights into the genetic regulation of tooth morphogenesis and ectodermal development.