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Separation of Mouse Embryonic Facial Ectoderm and Mesenchyme

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Published on: April 12, 2013

Identifying specific proteins involved in eggshell membrane formation using gene expression analysis and

Jingwen Du¹, Maxwell T Hincke², Megan Rose-Martel³

¹Department of Cellular and Molecular Medicine, University of Ottawa, 451 Smyth Road, Ottawa, K1H 8 M5, Canada. jdu013@uottawa.ca.

|October 17, 2015

Summary

Researchers identified key genes involved in avian eggshell membrane formation. This discovery enhances understanding of structural proteins like collagen X and fibrillin-1, aiding efforts to improve eggshell quality and food safety.

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Quantitative Analysis of Protein Expression to Study Lineage Specification in Mouse Preimplantation Embryos

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Published on: February 22, 2016

Area of Science:

Avian biology
Biomaterials science
Molecular genetics

Background:

Avian eggshell membranes are crucial for reproduction and have industrial/biomedical potential.
Their insoluble nature makes formation and protein composition challenging to study.
Understanding these membranes is key to improving eggshell quality.

Purpose of the Study:

To identify genes encoding eggshell membrane proteins.
To characterize proteins responsible for the structural integrity of eggshell membranes.
To analyze the transcriptome of the white isthmus for key gene expression.

Main Methods:

Utilized the Del-Mar 14 K chicken microarray.
Compared gene expression in the white isthmus (WI) with magnum (Ma) and uterine (Ut) oviduct segments.
Analyzed over-expressed transcripts to identify specific gene IDs.

Main Results:

Identified 107 Gallus gallus gene IDs with over-expressed transcripts in the WI.
Found significant upregulation of structural proteins: collagen X (COL10A1), fibrillin-1 (FBN1), and cysteine-rich eggshell membrane protein (CREMP).
Detected over-expression of genes involved in collagen processing (LOXL1-3, P4HA2, P4HB), isomerases (PPIC), and disulfide cross-linking (QSOX1, TXN).

Conclusions:

Identified genes critical for collagen processing and disulfide cross-linking in eggshell membrane formation.
Gained new insights into eggshell membrane structure and formation mechanisms.
Findings support developing strategies to enhance eggshell quality and food safety.