Assessing Insulin and Glucose Tolerance in the Aging Mouse

Area of Science:

• Gerontology
• Metabolic Disease Research
• Animal Models in Research

Background:

• Aging is associated with altered energy metabolism and increased prevalence of type 2 diabetes and impaired glucose tolerance.
• Mice are essential preclinical models for studying aging and metabolic diseases, aiding in the identification of intervention targets.
• Metabolic phenotyping, including glucose homeostasis assessment, is vital in aging research.

Purpose of the Study:

• To provide simple guidelines for standardizing glucose tolerance tests (GTT) and insulin tolerance tests (ITT) in aging mice.
• To improve the reliability and interpretability of GTT and ITT results in aging research.
• To address variability in laboratory practices affecting GTT and ITT outcomes.

Main Methods:

• Description of minimally invasive Glucose Tolerance Tests (GTT) and Insulin Tolerance Tests (ITT) for aging mice.
• Focus on blood glucose measurements following bolus injection of glucose or insulin.
• Emphasis on standardizing experimental conditions and laboratory practices.

Main Results:

• Guidelines are proposed to standardize GTT and ITT procedures in aging mouse models.
• Standardization aims to reduce variability in assay interpretation.
• Improved consistency in metabolic phenotyping of aging mice.

Conclusions:

• Standardized GTT and ITT protocols are essential for accurate glucose homeostasis evaluation in aging mice.
• Implementing these guidelines can enhance the reproducibility of preclinical aging and metabolic disease research.
• This work supports the use of aging mice for identifying therapeutic targets for age-related metabolic dysfunction.