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Updated: Jul 11, 2026
Dissection of the Mouse Pancreas for Histological Analysis and Metabolic Profiling
Published on: August 19, 2017
Caveats and considerations for performing pancreas-specific gene manipulations in the mouse
1Department of Molecular Physiology, Biophysics Vanderbilt University School of Medicine, Center for Stem Cell Biology, Nashville, TN 37232-0255, USA. magnuson@vanderbilt.edu
Abstract:
Conditional gene targeting using the Cre/loxP strategy has proven to be very useful for studies of glucose homeostasis, tissue function and dysfunction in diabetes, and pancreas development. However, use of this strategy over the past decade has revealed a variety of experimental caveats, many of which are a direct consequence of the procedures used to generate Cre-driver lines. We discuss frequently encountered experimental artefacts, the advantages of using bacterial artificial chromosome-derived transgenes or performing a Cre knockin for improving the specificity of expression, and systems for regulating Cre activity. In addition, recent studies indicate that high amounts of Cre in the pancreatic beta-cell may cause glucose intolerance and impaired insulin secretion. However, these findings, while serving as a reminder for simple experimental controls, are unlikely to diminish utilization of this very powerful and useful technology.
Insights
The Cre/loxP system is valuable for studying diabetes and pancreas development. However, researchers must be aware of potential experimental artifacts and ensure proper controls when using Cre-driver lines.
Area of Science:
- Molecular Biology
- Endocrinology
- Genetics
Background:
- The Cre/loxP system is widely used for conditional gene targeting in biological research.
- Its application in studying glucose homeostasis, diabetes, and pancreas development is significant.
- However, experimental caveats associated with Cre-driver lines have emerged.
Purpose of the Study:
- To review experimental artifacts associated with Cre-driver lines in Cre/loxP systems.
- To discuss strategies for improving expression specificity and regulating Cre activity.
- To highlight potential impacts of high Cre levels in pancreatic beta-cells.
Main Methods:
- Literature review of studies utilizing the Cre/loxP system.
- Discussion of experimental caveats and potential solutions.
- Analysis of recent findings on Cre expression in pancreatic beta-cells.
Main Results:
- Experimental artifacts can arise from Cre-driver line generation.
- Bacterial artificial chromosome-derived transgenes or Cre knockin can enhance expression specificity.
- High Cre levels in pancreatic beta-cells may lead to glucose intolerance and impaired insulin secretion.
Conclusions:
- Despite potential caveats, the Cre/loxP technology remains a powerful tool for biological research.
- Awareness of experimental artifacts and implementation of proper controls are crucial for reliable results.
- Further research may refine Cre/loxP applications in studying metabolic diseases and development.
