Diabetes models by screen for hyperglycemia in phenotype-driven ENU mouse mutagenesis projects

Area of Science:

• Genetics and Pathogenesis of Diabetes Mellitus
• Mammalian Genetics and Genomics
• Metabolic Disease Research

Background:

• Diabetes mellitus affects over 150 million people globally, with rising prevalence.
• The complete pathogenesis of diabetes mellitus remains incompletely understood.
• Appropriate experimental models are crucial for dissecting disease mechanisms.

Purpose of the Study:

• To establish novel diabetes models using phenotype-driven N-ethyl-N-nitrosourea (ENU) mutagenesis.
• To identify genetic causes of hyperglycemia using a high-throughput screening approach.
• To provide a comprehensive resource for studying diabetes pathogenesis.

Main Methods:

• Large-scale N-ethyl-N-nitrosourea (ENU) mouse mutagenesis projects.
• High-throughput screening for hyperglycemia as a phenotype.
• Establishment of mouse lines over several generations to confirm heritable phenotypes.
• Chromosomal assignment and candidate gene analysis to identify causative mutations.
• Diet challenge assays to investigate gene-environment interactions.

Main Results:

• Identification of novel alleles in known glucose homeostasis genes (e.g., glucokinase, insulin 2, insulin receptor).
• Establishment of multiple ENU-induced hyperglycemia mouse lines for further genetic analysis.
• Implementation of improved screening methods for detecting subtle diabetic phenotypes.

Conclusions:

• Phenotype-driven ENU mutagenesis provides valuable novel mouse models for diabetes research.
• These models complement existing targeted mutagenesis approaches.
• The generated resource facilitates a systematic dissection of diabetes mellitus pathogenesis.