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TNF signalling in tooth development.

Atsushi Ohazama¹, Paul T Sharpe

¹Department of Craniofacial Development, Dental Institute, King's College, Guy's Hospital, London Bridge, London SE1 9RT, UK.

Current Opinion in Genetics & Development

|September 24, 2004

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Mammalian tooth development involves complex signaling pathways. Recent research highlights the crucial role of Tumor Necrosis Factor (TNF)-family ligands in tooth shape and number, activating NF-kappaB signaling.

Area of Science:

Developmental Biology
Molecular Biology
Evolutionary Biology

Background:

Mammalian tooth development is a model for organogenesis, involving intricate interactions between epithelium and neural crest-derived mesenchyme.
Key signaling pathways like BMP, FGF, Wnt, and Hedgehog are known regulators of tooth development.
Ligand-receptor signaling mediates these crucial developmental processes.

Purpose of the Study:

To investigate the role of specific signaling pathways in mammalian tooth morphogenesis.
To identify novel molecular mechanisms governing tooth development and evolution.
To explore the function of TNF-family ligands in regulating tooth number and shape.

Main Methods:

Analysis of gene expression patterns during tooth development.

Related Experiment Videos

Investigating ligand-receptor interactions.

Studying the activation of downstream signaling pathways, such as NF-kappaB.

Main Results:

Established signaling molecules (BMP, FGF, Wnt, Hedgehog) are involved in multiple stages of tooth development.
Identified a specific role for TNF-family ligands in tooth morphogenesis.
Demonstrated that TNF-family ligand signaling activates NF-kappaB, impacting tooth development and evolution.

Conclusions:

The TNF-family ligand pathway plays a significant role in mammalian tooth morphogenesis.
Activation of NF-kappaB by TNF-family ligands is important for regulating tooth number and shape.
This pathway has likely contributed to the evolution of dental diversity.