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Multistep control of pituitary organogenesis
H Z Sheng1, K Moriyama, T Yamashita
1Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.
Science (New York, N.Y.)
|December 31, 1997
Summary
Lhx3 and Lhx4 (Gsh4) genes are crucial for pituitary gland development in mice. These genes control multiple stages, from initial pouch formation to cell differentiation, ensuring proper organ identity.
Area of Science:
- Developmental Biology
- Genetics
- Molecular Biology
Background:
- The pituitary gland is essential for endocrine regulation.
- Formation of the pituitary involves sequential developmental steps, including Rathke's pouch development.
- LIM homeobox genes play critical roles in organogenesis.
Purpose of the Study:
- To investigate the roles of Lhx3 and Lhx4 (Gsh4) genes in mouse pituitary gland formation.
- To understand the specific contributions of Lhx3 and Lhx4 to developmental decisions during organogenesis.
Main Methods:
- Genetic analysis in mice.
- Gene expression studies.
- Analysis of pituitary development at different stages.
Main Results:
- Lhx3 and Lhx4 exhibit redundant control over definitive Rathke's pouch formation.
- Lhx3 regulates pituitary fate commitment.
- Together, Lhx3 and Lhx4 control proliferation and differentiation of pituitary cell lineages.
Conclusions:
- Lhx3 and Lhx4 are key regulators of pituitary organ identity.
- These genes act at multiple stages of pituitary development, from initial formation to cell-specific differentiation.