Related Experiment Video
Updated: May 11, 2026
06:29
Propagation of Dental and Respiratory Cells and Organs in Microgravity
Published on: May 25, 2021
2.5K
Generation and characterization of a murine amelogenesis imperfecta model
Eui-Sic Cho1, Jan C-C Hu2, Jung-Wook Kim3
1Cluster for Craniofacial Development and Regeneration Research, Institute of Oral Biosciences, School of Dentistry, Jeonbuk National University, Jeonju, South Korea.
Archives of Oral Biology
|March 6, 2026
Summary
A new mouse model with a specific AMELX gene mutation shows defective enamel formation, mimicking amelogenesis imperfecta. This model will help study disease causes and test treatments for enamel defects.
Area of Science:
- Genetics and Molecular Biology
- Developmental Biology
- Dental Research
Background:
- Amelogenesis imperfecta (AI) comprises rare genetic disorders affecting tooth enamel quality and quantity.
- Mutations in the AMELX gene, encoding amelogenin, disrupt enamel formation.
- Exon 4 retention in AMELX pre-mRNA causes AI-associated enamel defects.
Purpose of the Study:
- To investigate the functional impact of AMELX exon 4 retention.
- To generate and characterize a gene-edited mouse model for AI research.
Main Methods:
- CRISPR/Cas9 technology used to create a knock-in mouse model with a specific mutation (c.120 T>C) in the AMELX gene.
- Validation of genomic sequence and genotyping of offspring.
- Micro-computed tomography and immunohistochemistry performed on mouse hemi-mandibles.
Main Results:
- Knock-in mice exhibited chalky white, translucent-lacking enamel due to faulty mineralization.
- Defective enamel fractured shortly after eruption.
- Ameloblast layers in knock-in mice showed disrupted cellular polarity and organization.
Conclusions:
- The Amelx c.120 T>C mouse model accurately reflects AI phenotypes caused by exon 4 retention.
- This model is valuable for studying the molecular mechanisms of AI.
- The model will aid in evaluating potential therapeutic strategies for AI.
