Related Experiment Video
Updated: Jun 11, 2025
05:18
A Protocol for Constructing a Rat Wound Model of Type 1 Diabetes
Published on: February 17, 2023
3.7K
Modified streptozotocin-induced diabetic model in rodents
Anton Lennikov1, Farris ElZaridi1, Menglu Yang1
1Department of Ophthalmology, Schepens Eye Research Institute, Mass Eye and Ear, Harvard Medical School, Boston, Massachusetts, USA.
Animal Models and Experimental Medicine
|October 1, 2024
Summary
This study optimized the streptozotocin (STZ)-induced type I diabetes mellitus (DM) model in mice. The improved method enhances survival rates and reduces experimental variability for better diabetes research outcomes.
Area of Science:
- Biomedical Research
- Animal Models
- Endocrinology
Background:
- Streptozotocin (STZ)-induced type I diabetes mellitus (DM) models are crucial for studying insulin-dependent hyperglycemia.
- Existing STZ models often face challenges with poor induction rates, low survival, and the need for insulin supplementation, complicating long-term studies.
Purpose of the Study:
- To develop a modified STZ-induced DM model in C57BL/6J mice with improved survival rates and reduced experimental variability.
- To eliminate the need for insulin supplementation in long-term STZ-induced DM studies.
Main Methods:
- Administered low-dose streptozotocin (STZ) over 5 days to non-fasted C57BL/6J mice.
- Dissolved STZ in pH-neutral phosphate-buffered saline (PBS) instead of acidic citrate buffer.
- Monitored hyperglycemia induction, blood glucose levels, body weight, and mortality up to 21 weeks.
Main Results:
- Achieved a 94.28% hyperglycemia induction rate within one week post-STZ injection.
- Maintained stable high blood glucose levels and body weight in mice.
- Observed minimal mortality up to 21 weeks without insulin supplementation.
Conclusions:
- The modified STZ protocol significantly improves mouse survival and reduces experimental effort and animal stress.
- This optimized model enhances experimental outcomes and animal welfare for diabetes research.
- Provides a valuable resource for researchers studying diabetes and its complications with minimized variability and animal usage.
