Targeting the JAK/STAT Signaling Pathway for Breast Cancer
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Updated: Nov 26, 2025

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Published on: June 9, 2023
Fei Shao1, Xiaonan Pang1, Gyeong Hun Baeg2
1Department of Oncology, Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China.
Abstract:
Breast cancer is the most common malignant tumor in women worldwide. Traditional ways of treatment, including radiotherapy and endocrine therapy, for breast cancer have inevitable side effects. In recent decades, targeted therapies for breast cancer have rapidly advanced and shown a promising future. The JAK/STAT signaling pathway has been shown to play important roles in tumorigenesis, maintenance and metastasis of breast cancer. Hence, many small molecule inhibitors of JAK and STAT proteins have been developed. These inhibitors exhibit potent inhibitory effects on breast cancer in both cellular and animal models, and even some of them have already been in clinical trials. This review article discussed the JAK/STAT signal transduction pathway in the pathogenesis of breast cancer, and the potential for the application of JAK/STAT inhibitors in breast cancer treatment.
Insights
Targeted therapies offer a promising future for breast cancer treatment by inhibiting the JAK/STAT pathway. These JAK/STAT inhibitors show potent effects in preclinical models and are advancing into clinical trials.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Breast cancer is a leading cause of cancer death in women globally.
- Conventional treatments like radiotherapy and endocrine therapy have significant side effects.
- Targeted therapies represent a rapidly advancing frontier in breast cancer management.
Purpose of the Study:
- To review the role of the Janus kinase/signal transducer and activator of transcription (JAK/STAT) signaling pathway in breast cancer.
- To discuss the therapeutic potential of JAK/STAT inhibitors for breast cancer treatment.
Main Methods:
- Literature review of studies on the JAK/STAT pathway in breast cancer.
- Analysis of preclinical data (cellular and animal models) for JAK/STAT inhibitors.
- Overview of current clinical trial progress for these inhibitors.
Main Results:
- The JAK/STAT pathway is implicated in breast cancer initiation, progression, and metastasis.
- Small molecule inhibitors targeting JAK and STAT proteins demonstrate significant anti-cancer activity.
- Several JAK/STAT inhibitors have progressed to clinical trials, indicating therapeutic promise.
Conclusions:
- The JAK/STAT pathway is a critical target for breast cancer therapy.
- JAK/STAT inhibitors offer a targeted approach with potential to overcome limitations of traditional treatments.
- Further clinical investigation of JAK/STAT inhibitors is warranted for effective breast cancer treatment.
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