Mouse pancreatic endocrine cell transcriptome defined in the embryonic Ngn3-null mouse

Area of Science:

• Developmental biology
• Endocrinology
• Genomics

Background:

• Pancreatic islets are crucial for glucose homeostasis.
• Understanding islet development is key to addressing diabetes.
• Gene expression dynamics during islet development are not fully characterized.

Purpose of the Study:

• To comprehensively document the mouse pancreatic islet transcriptome during early and late development.
• To identify genes involved in endocrine cell specification, growth, and differentiation.
• To discover biomarkers for endocrine cells, diabetes autoimmunity targets, and regulatory pathways.

Main Methods:

• Microarray analysis of embryonic mouse pancreas (e12.5-18.5) from neurogenin 3 (Ngn3)-null mice.
• Integration of data with adult islet and endocrine tumor cell line expression profiles.
• Compilation of gene lists specifically expressed in endocrine cells.

Main Results:

• Identification of transcriptional and morphogenetic factors critical for endocrine lineage patterning and differentiation.
• Discovery of genes regulating beta-cell glucose responsiveness and candidate diabetes autoantigens (e.g., insulin, IA-2, Slc30a8).
• Provision of downloadable, cell-type-specific gene lists.

Conclusions:

• The generated dataset serves as a valuable resource for islet developmental and cell biology research.
• This resource aids in investigating the pathogenesis of type 1 and type 2 diabetes.
• The findings facilitate the identification of novel therapeutic targets and diagnostic markers.