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Published on: August 1, 2025
Type I Interferon Promotes Antitumor T Cell Response in CRPC by Regulating MDSC
Lilv Fan1, Guiliang Xu1, Jingjing Cao1
1Sheng Yushou Center of Cell Biology and Immunology, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
Granulocytic myeloid-derived suppressor cells (G-MDSCs) drive castration-resistant prostate cancer (CRPC) progression. Interferon-alpha (IFNα) effectively reduces G-MDSCs and enhances anti-tumor immunity, offering a promising CRPC immunotherapy.
Area of Science:
- Immunology
- Oncology
- Cancer Research
Background:
- Metastatic castration-resistant prostate cancer (CRPC) is a leading cause of cancer-related death.
- Understanding immune regulation in CRPC is critical for developing effective treatments.
Purpose of the Study:
- To investigate the immune mechanisms underlying CRPC development.
- To identify and evaluate potential immunotherapies for CRPC.
Main Methods:
- Established a CRPC mouse model using Myc-CaP cells and FVB mice.
- Analyzed the tumor microenvironment (TME) immune cell profile during CRPC progression.
- Screened and investigated the efficacy of various immunotherapies in vitro and in vivo.
Main Results:
- Granulocytic myeloid-derived suppressor cells (G-MDSCs) increased in the TME during CRPC development.
- Interferon-alpha (IFNα) demonstrated superior efficacy in reducing tumor growth compared to other tested immunotherapies.
- IFNα decreased G-MDSC numbers and suppressed their function, enhancing T cell activity.
Conclusions:
- G-MDSCs play a pivotal role in CRPC and impact immunotherapy effectiveness.
- IFNα represents a promising therapeutic strategy for CRPC by inhibiting tumor growth and restoring T cell-mediated immunity.
- IFNα's mechanism involves reducing G-MDSCs and enhancing T cell priming and activation.
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