C57BL/6 Mice: A Cornerstone of Biomedical Research
The C57BL/6 mouse strain is one of the most widely used inbred strains in biomedical research, serving as a crucial model for studying a diverse range of conditions, from genetics and immunology to neurobiology and cardiovascular disease. Originally developed in 1921, this strain continues to be refined and utilized by researchers globally. This article details the history, characteristics, applications, and recent advancements related to the C57BL/6 mouse.
Historical Development
The C57BL/6 strain traces its origins back to mice 57 and 52 bred by C.C. Little in 1921.1 Inbreeding led to the establishment of the C57BL line, with C57BL/6 and C57BL/10 sublines diverging in 1937. More recently, Spafas (now Beijing) Biotechnology Co., Ltd. Introduced and bred C57BL/6JNifdc mice from the National Rodent Laboratory Animal Resources in 2011.1
Key Characteristics
C57BL/6 mice exhibit several notable characteristics that contribute to their utility in research:
- Low Spontaneous Tumor Incidence: Making them suitable for cancer research where minimizing background tumor development is critical.1
- Strong Resistance and Adaptability: Facilitating ease of breeding and maintenance in laboratory settings.1
- High Reproductive and Survival Rates: Ensuring consistent experimental cohorts.1
- Prone to Diet-Induced Obesity: A valuable trait for studying metabolic disorders and obesity-related complications.1
- High Alcohol Tolerance: Useful in research investigating alcohol dependence and related physiological effects.1
- Specific Immunological Traits: Including high interferon production and moderate tolerance to radiation.1
Research Applications
The versatility of the C57BL/6 mouse strain has led to its widespread use in a broad spectrum of research areas:
- Genetics: As a well-characterized inbred strain, it serves as a foundation for genetic studies and the creation of genetically modified models.3
- Immunology: Its defined immune profile makes it valuable for investigating immune responses and autoimmune diseases.
- Neurobiology and Neurology: Used in studies of brain function, neurodegenerative diseases, and behavioral phenotypes.
- Cardiovascular Biology: Models of myocardial infarction and other cardiovascular conditions are frequently generated using this strain.
- Developmental Biology: Investigating developmental processes and congenital disorders.
- Metabolic Disorders: Modeling diabetes and obesity.1
- Antibody Production: Used for the preparation of monoclonal and polyclonal antibodies.1
Recent Research Utilizing C57BL/6 Mice
Recent studies continue to highlight the importance of C57BL/6 mice in advancing scientific understanding. For example, research published in January 2026 demonstrated the use of 6-7-week-old female C57BL/6 mice to study the hair follicle cycle.2 Another study utilized 6-week-old female C57BL/6J mice, alongside BALB/c and C57BL/6N strains, to investigate immune responses to vaccination with CpG adjuvant and ovalbumin (OVA).4
Physiological Data (8-Week-Old C57BL/6J Mice)
The following physiological data is representative of 8-week-old C57BL/6J mice:
| Parameter | Male | Female | Units |
|---|---|---|---|
| White Blood Cell Count | 4.03 ± 0.71 | 3.39 ± 0.75 | 109/L |
| Neutrophil Count | 0.43 ± 0.1 | 0.38 ± 0.1 | 109/L |
| Lymphocyte Count | 3.56 ± 0.66 | 2.97 ± 0.64 | 109/L |
(Data sourced from Beijing Biotechnology Co., Ltd.)1
Conclusion
The C57BL/6 mouse strain remains an indispensable tool for biomedical research. Its well-defined genetic background, consistent physiological characteristics, and susceptibility to various disease models ensure its continued relevance in advancing scientific knowledge and developing novel therapies. Ongoing research and refinement of this strain will undoubtedly contribute to further breakthroughs in the years to approach.