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Mouse Models of Cancer Study

Mouse Models of Cancer Study

Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...

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Updated: Jul 5, 2026

An Orthotopic Mouse Model of Spontaneous Breast Cancer Metastasis

An Orthotopic Mouse Model of Spontaneous Breast Cancer Metastasis

Published on: August 14, 2016

Mouse 4T1 breast tumor model.

B A Pulaski¹, S Ostrand-Rosenberg

¹University of Maryland Baltimore County, Baltimore, Maryland, USA.

Current Protocols in Immunology

|April 25, 2008

Summary

The 4T1 mammary carcinoma model offers a unique platform for studying spontaneous metastasis in breast cancer research. Its characteristics closely mimic human disease progression, aiding in the development of novel therapeutic strategies.

Area of Science:

Oncology
Cancer Biology
Translational Research

Background:

The 4T1 mammary carcinoma is a widely used experimental model for breast cancer research.
It exhibits high tumorigenicity, invasiveness, and spontaneous metastasis to distant organs, closely resembling human breast cancer.
Unlike many models, 4T1 allows for the study of metastasis in anatomically relevant sites and spontaneous development.

Purpose of the Study:

To describe the 4T1 mammary carcinoma model and its utility in studying spontaneous metastasis.
To present a protocol for surgical removal of the primary tumor to facilitate the study of metastatic disease.
To highlight the advantages of the 4T1 model for quantitative analysis of disseminated tumor cells.

Main Methods:

Surgical removal of the primary 4T1 tumor.

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Utilizing 4T1's resistance to 6-thioguanine for precise cell quantitation.

Transplantation of 4T1 cells into the mammary gland for in vivo studies.

Main Results:

The 4T1 model allows for spontaneous metastasis to multiple organs, including lymph nodes, liver, lung, brain, and bone.
Surgical removal of the primary tumor enables the study of established metastatic foci.
6-thioguanine resistance facilitates accurate quantification of even sub-microscopic metastatic cell populations.

Conclusions:

The 4T1 mammary carcinoma model is a valuable tool for investigating spontaneous breast cancer metastasis.
The described protocol supports research comparable to clinical scenarios involving primary tumor resection.
The model's unique properties enable precise assessment of metastatic burden and therapeutic efficacy.