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Expression of Claudin-3 during chick development.

Kim E Haworth¹, Amira El-Hanfy, Sharon Prayag

¹Department of Craniofacial Development, GKT Dental Institute, Kings College London, Guys Hospital, London Bridge, SE1 9RT, London, UK.

Gene Expression Patterns : GEP

|July 19, 2005

Summary

This study identifies Claudin-3 (a tight junction protein) expression in chick embryos during development. Claudin-3 is found in various developing tissues, suggesting its crucial role in embryonic development.

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Area of Science:

Developmental Biology
Molecular Biology
Cell Biology

Background:

Claudins are essential components of tight junctions, crucial for epithelial barrier function.
Understanding the expression patterns of claudins provides insights into their roles during tissue development.

Purpose of the Study:

To isolate and characterize the chick homologue of Claudin-3.
To investigate the spatiotemporal expression profile of Claudin-3 transcripts during early chick embryogenesis.

Main Methods:

Isolation of chick Claudin-3 using degenerate and gene-specific primers.
Analysis of Claudin-3 transcript expression via in situ hybridization or RT-PCR across Hamburger and Hamilton (HH) stages 6-22.

Main Results:

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Claudin-3 transcripts were detected from early developmental stages (HH 6-22).
Early expression observed in the mesoderm near Hensen's node and head fold.
Expression domains expanded to include the anterior intestinal portal, otic vesicle, pharyngeal endoderm/pouches, mesonephric system, liver, lung bud, and intestine in later stages.

Conclusions:

Claudin-3 exhibits dynamic expression patterns throughout chick embryonic development.
The diverse expression suggests Claudin-3 plays significant roles in the formation and function of various developing organs and tissues.