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Development and Validation of a Methodology for Establishing Obese Rat Models with Typical Fatty Pancreas

Development and Validation of a Methodology for Establishing Obese Rat Models with Typical Fatty Pancreas

Published on: November 11, 2025

Alpha-fetoprotein is dynamically expressed in rat pancreas during development.

Lijie Liu¹, Jing Guo, Li Yuan

¹Department of Biochemistry, Nanjing Medical University, Nanjing, Jiangsu Province, China.

Development, Growth & Differentiation

|September 21, 2007

Summary

Researchers identified 15 differentially expressed proteins during rat pancreatic development using proteomics. Alpha-fetoprotein (AFP) expression dynamics suggest its involvement in pancreas development.

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Area of Science:

Developmental Biology
Proteomics
Biochemistry

Background:

Understanding the molecular mechanisms of pancreatic development is crucial for regenerative medicine and disease treatment.
Proteomic analysis offers a powerful approach to identify key proteins regulating developmental processes.

Purpose of the Study:

To identify proteins involved in pancreatic development across distinct embryonic and postnatal stages.
To characterize the expression pattern and localization of alpha-fetoprotein (AFP) during pancreatic development.

Main Methods:

Differential proteomics comparing pancreatic extracts from embryonic day (E) 15.5, E18.5, postnatal (P) day 0, and adult rats.
Two-dimensional gel electrophoresis (2D-E) and MALDI-TOF Mass Spectrometry for protein identification.
Western blotting and immunolocalization to determine alpha-fetoprotein (AFP) isoforms, expression levels, and cellular localization.

Main Results:

Fifteen proteins were identified with differential expression patterns across the four developmental stages.
Four AFP isoforms (72, 60, 48, and 37 kDa) were detected, with highest expression at E18.5, decreasing postnatally.
AFP immunolocalization showed strong signals in mesenchyme cells at E18.5, diminishing in adult pancreas.

Conclusions:

The dynamic expression and localization of AFP during pancreatic development suggest a potential role in regulating this process.
Proteomics provides valuable insights into the molecular players governing organogenesis.