Related Experiment Video
Updated: Jan 13, 2026
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Dissection and Coronal Slice Preparation of Developing Mouse Pituitary Gland
Published on: November 16, 2017
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Primary cilia and BBS4 are required for postnatal pituitary development.
Kathryn M Brewer1, Katlyn K Brewer1, Nicholas C Richardson1
1Department of Biology, Indiana University - Indianapolis, Indianapolis, IN, USA.
Developmental Biology
|January 9, 2026
Summary
Cilia are vital for pituitary development. Bardet-Beidl syndrome (BBS) disrupts cilia, leading to hypoplastic pituitaries and altered stem cell function, impacting overall growth.
Area of Science:
- Cell Biology
- Developmental Biology
- Genetics
Background:
- Primary cilia are crucial cellular organelles regulating key signaling pathways.
- Disruption of cilia function leads to a spectrum of genetic disorders known as ciliopathies.
- Bardet-Beidl syndrome (BBS) is a complex ciliopathy offering insights into cilia's role in diverse tissues.
Purpose of the Study:
- To investigate the role of cilia and Bardet-Beidl syndrome (BBS) gene function in pituitary development and stem cell biology.
- To determine the impact of Bbs4 knockout on pituitary structure, cell populations, and signaling pathways.
- To explore the contribution of cilia-mediated signaling to pituitary stem cell characteristics.
Main Methods:
- Utilized a Bbs4 knockout mouse model (Bbs4-/-) to study pituitary development.
- Examined pituitary growth, cell composition (gonadotrophs), and Hedgehog (HH) signaling in Bbs4-/- mice.
- Investigated the characteristics of isolated pituitary stem cells from Bbs4-/- mice, including HH signal responsiveness and stem cell marker expression.
Main Results:
- Adult Bbs4-/- pituitaries were hypoplastic with an increased proportion of gonadotrophs.
- Pituitary-specific deletion of IFT88, essential for ciliogenesis, also resulted in attenuated pituitary growth and increased gonadotrophs.
- Developing Bbs4-/- pituitaries showed mildly reduced Hedgehog (HH) signaling, and isolated stem cells exhibited diminished HH responsiveness and stem cell marker expression.
Conclusions:
- Cilia and Bardet-Beidl syndrome (BBS) gene function are essential for normal pituitary gland growth.
- Altered cilia-mediated patterning in the pituitary may underlie the physiological features observed in ciliopathies like BBS.
- These findings highlight the critical role of cilia in pituitary stem cell regulation and overall gland development.
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