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Updated: Mar 9, 2026
Studying Triple Negative Breast Cancer Using Orthotopic Breast Cancer Model
Published on: March 20, 2020
Comparison of Tumor Recurrence After Resection of Highly- and Poorly-Metastatic Triple-negative Breast Cancer in
Shuya Yano1,2,3, Kiyoto Takehara1,2,3, Hiroyuki Kishimoto3
1AntiCancer, Inc., San Diego, CA, U.S.A.
Background:
Triple-negative breast cancer (TNBC), defined by the absence of receptors for estrogen, progesterone and human epithelial receptor 2, is a recalcitrant disease in need of effective therapy. We previously isolated highly-metastatic variants of the human TNBC cell line MDA-MB-231 using serial orthotopic implantation in nude mice.
Materials And Methods:
In the present report, we compared local and metastatic recurrence in lymph nodes in orthotopic nude-mouse models after bright-light surgery (BLS) of tumors from highly-metastatic variants or poorly-metastatic parental MDA-MB-231-RFP cells. Orthotopic tumors from parental MDA-MB-231 or highly-metastatic MDA-MB-231 were resected under bright light similar to an operating room.
Results:
After resection of primary tumors, local recurrence from highly-metastatic MDA-MB-231 cells grew more rapidly than did parental MDA-MB-231 cells. Lymph-node metastasis from highly-metastatic MDA-MB-231 cells occurred after primary tumor resection much more extensively than after parental MDA-MB-231 tumors were resected.
Conclusion:
The results of the present report suggest that conventional surgery under bright light was unable to control highly-metastatic compared with poorly-metastatic MDA-MB-231 TNBC.
Insights
Bright-light surgery (BLS) showed limited effectiveness against highly-metastatic triple-negative breast cancer (TNBC) in mouse models. Highly-metastatic TNBC cells demonstrated more rapid local recurrence and extensive lymph node metastasis post-surgery compared to poorly-metastatic cells.
Area of Science:
- Oncology
- Surgical Oncology
- Cancer Metastasis
Background:
- Triple-negative breast cancer (TNBC) lacks effective therapies due to its aggressive nature.
- Highly-metastatic variants of the MDA-MB-231 TNBC cell line were previously established in mice.
- Understanding TNBC behavior is critical for developing improved treatment strategies.
Purpose of the Study:
- To compare local and lymph node recurrence after bright-light surgery (BLS) in orthotopic TNBC mouse models.
- To evaluate the efficacy of BLS in controlling highly-metastatic versus poorly-metastatic TNBC.
- To assess the impact of primary tumor resection on metastatic spread.
Main Methods:
- Orthotopic nude-mouse models were established using parental (poorly-metastatic) and highly-metastatic MDA-MB-231 TNBC cells.
- Primary tumors were resected under bright light conditions, simulating surgical procedures.
- Local tumor recurrence and lymph node metastasis were monitored and compared between groups.
Main Results:
- Highly-metastatic TNBC cells exhibited significantly faster local recurrence post-resection compared to parental cells.
- Extensive lymph node metastasis was observed following resection of highly-metastatic TNBC tumors.
- Parental MDA-MB-231 tumors showed less aggressive local recurrence and lymph node metastasis.
Conclusions:
- Conventional bright-light surgery is insufficient for controlling highly-metastatic TNBC.
- The metastatic potential of TNBC cells influences post-surgical recurrence and spread.
- Further research is needed to develop advanced surgical or therapeutic approaches for aggressive TNBC.
