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Bone morphogenetic protein signaling pathway plays multiple roles during gastrointestinal tract development
Pascal De Santa Barbara1, Jerrell Williams, Allan M Goldstein
1Institut de Génétique Humaine, UPR 1142 CNRS, Montpellier, France. desanta@igh.cnrs.fr
Summary
Bone morphogenetic protein (BMP) signaling is crucial for gastrointestinal (GI) tract development. This study reveals BMP signaling
Area of Science:
- Developmental Biology
- Molecular Biology
- Gastroenterology
Background:
- Bone morphogenetic protein (BMP) signaling is vital for vertebrate gastrointestinal (GI) tract development.
- Understanding BMP pathway activation patterns and functional roles is key to deciphering GI development.
Purpose of the Study:
- To investigate the endogenous activation patterns of the BMP signaling pathway in the developing GI tract.
- To determine the functional requirement of BMP signaling in the development and differentiation of GI tract tissue layers.
Main Methods:
- Immunohistochemistry using an antibody for phosphorylated Smad1, 5, and 8 to detect active BMP signaling.
- Avian-specific retroviral misexpression to manipulate BMP signaling activity in the gut mesoderm.
Main Results:
- Endogenous BMP signaling is activated in the mesoderm, endoderm, and enteric nervous system (ENS) of the developing chick GI tract.
- BMP signaling activation is more widespread than BMP ligand expression.
- BMP signaling is essential for the patterning, development, and differentiation of the gut's mesoderm, endoderm, and ectoderm.
Conclusions:
- BMP signaling is activated across all tissue layers of the developing GI tract.
- BMP signaling plays a critical role in mediating reciprocal communication between GI tissue layers during development.