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Analyzing Craniofacial Morphogenesis in Zebrafish Using 4D Confocal Microscopy
Published on: January 30, 2014
BMP4 signaling mediates Zeb family in developing mouse tooth
Jeong-Oh Shin1, Eun-Jung Kim, Kyoung-Won Cho
1Division in Anatomy and Developmental Biology, Department of Oral Biology, Research Center for Orofacial Hard Tissue Regeneration, Brain Korea 21 Project, Oral Science Research Center, College of Dentistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Korea.
Histochemistry and Cell Biology
|February 22, 2012
Summary
Zeb1 and Zeb2 transcription factors are crucial for tooth development. Bone morphogenetic protein 4 (BMP4) signaling regulates Zeb1 and Zeb2 expression, impacting craniofacial organ morphogenesis.
Area of Science:
- Developmental Biology
- Craniofacial Development
- Molecular Biology
Background:
- Tooth morphogenesis involves intricate signaling between oral epithelium and neural-crest-derived ectomesenchyme.
- Key signaling molecules like BMP, Hedgehog, FGF, and Wnt orchestrate these interactions.
- The Zeb family of transcription factors is vital for neural development, but their role in tooth development is largely unknown.
Purpose of the Study:
- To investigate the expression patterns of Zeb1 and Zeb2 during craniofacial development.
- To focus on the role of Zeb1 and Zeb2 in the mesenchyme of the palate, hair follicle, and tooth germ.
- To examine the interplay between Zeb family transcription factors and BMP4 signaling in tooth development.
Main Methods:
- Analyzing Zeb1 and Zeb2 expression profiles in mouse models from embryonic day 12.5 to 16.5.
- Utilizing BMP4-soaked beads and tissue recombination experiments to study gene regulation.
- Observing expression changes in the mesenchyme of palate, hair follicle, and tooth germ during specific developmental stages.
Main Results:
- Zeb1 and Zeb2 exhibited consistent expression in the mesenchyme of the palate, hair follicle, and tooth germ across all observed stages.
- Expression of Zeb1 and Zeb2 was notably absent in the epithelium-separated dental mesenchyme during the cap stage of tooth germ development.
- BMP4 signaling effectively restored the expression of Zeb1 and Zeb2 within the dental mesenchyme.
Conclusions:
- Zeb1 and Zeb2 are expressed in neural-crest-derived craniofacial tissues, including the developing tooth.
- BMP4 signaling plays a critical role in mediating the expression of Zeb1 and Zeb2 during tooth development.
- These findings highlight the importance of Zeb1 and Zeb2, regulated by BMP4, in the morphogenesis of craniofacial organs derived from neural crest cells.
