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An Ex vivo Culture System to Study Thyroid Development
Published on: June 6, 2014
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Thyroid Hormones Regulate Goblet Cell Differentiation and Fgf19-Fgfr4 Signaling
Einat Blitz1,2, Hiroki Matsuda3, Stefan Guenther4
1The Faculty of Life Sciences and the Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat-Gan, 5290002, Israel.
Endocrinology
|March 6, 2021
Summary
Thyroid hormones (THs) regulate gut development. In hypothyroidism, THs normally inhibit the Fgf19-Fgfr4 pathway, which is crucial for goblet cell differentiation, offering potential therapeutic targets for gastrointestinal diseases.
Area of Science:
- Endocrinology
- Developmental Biology
- Gastroenterology
Background:
- Hypothyroidism, a condition of insufficient thyroid hormones (THs), impairs intestinal development and is linked to gastrointestinal disorders.
- Goblet cells, essential for intestinal mucus secretion, are affected by TH levels.
Purpose of the Study:
- To investigate the role of THs in zebrafish intestinal development.
- To identify TH-modulated genes and cellular pathways involved in gut development.
- To explore therapeutic targets for TH-related gastrointestinal diseases.
Main Methods:
- Utilized a zebrafish model of hypothyroidism.
- Performed transcriptome profiling to identify differentially expressed genes.
- Employed genetic manipulation (dominant-negative Fgfr transgenic line) to block FGF signaling.
Main Results:
- Hypothyroidism led to reduced goblet cell numbers in zebrafish intestines, which was reversible with T3 treatment.
- Thyroid hormones (THs) were found to inhibit the Fgf19-Fgfr4 signaling pathway.
- Blocking FGF signaling rescued goblet cell differentiation in hypothyroid zebrafish.
Conclusions:
- THs inhibit the Fgf19-Fgfr4 pathway, impacting goblet cell differentiation in hypothyroidism.
- Both TH and Fgf19-Fgfr4 signaling pathways represent potential pharmaceutical targets for treating TH-related gastrointestinal conditions.
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