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Updated: Dec 25, 2025
09:43
Isolation, Culture, and Characterization of Prostate Cancer-Associated Fibroblasts
Published on: August 1, 2025
643
KLF5 Is Crucial for Androgen-AR Signaling to Transactivate Genes and Promote Cell Proliferation in Prostate Cancer
Juan Li1,2, Baotong Zhang3, Mingcheng Liu1,2
1Department of Genetics and Cell Biology, College of Life Sciences, Nankai University, 94 Weijin Road, Tianjin 300071, China.
Cancers
|April 5, 2020
Summary
Krüppel-like factor 5 (KLF5) is upregulated by androgen receptor (AR) signaling in prostate cancer. KLF5 enhances AR activity, promoting cell proliferation and tumor growth, suggesting a new therapeutic target.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Androgen receptor (AR) signaling is crucial for prostate development and cancer.
- Resistance to androgen deprivation therapy is a major challenge in advanced prostate cancer.
- Krüppel-like factor 5 (KLF5) is implicated in prostate development and cancer.
Purpose of the Study:
- To investigate the role of KLF5 in androgen receptor signaling within prostate cancer cells.
- To elucidate the mechanism by which KLF5 influences AR activity and prostate cancer progression.
Main Methods:
- Utilized LNCaP and C4-2B prostate cancer cell lines.
- Investigated KLF5 regulation by androgen and its effect on AR activity.
- Performed in vitro and in vivo studies to assess the impact of KLF5 silencing on tumor growth.
- Examined the interaction between KLF5 and AR at the molecular level, including promoter occupancy and gene expression analysis.
Main Results:
- KLF5 expression is upregulated by androgen in an AR-dependent manner.
- Silencing KLF5 reduces AR transcriptional activity, cell proliferation, and tumor growth.
- KLF5 binds to the AR promoter, repressing AR transcription.
- KLF5 and AR physically interact to co-regulate genes involved in cell proliferation (e.g., MYC, CCND1, PSA).
Conclusions:
- KLF5 is transcriptionally upregulated by AR signaling but also positively regulates AR expression and activity.
- The KLF5-AR interaction is a key driver of proliferation in androgen-sensitive prostate cancer.
- Targeting the KLF5-AR pathway presents a potential therapeutic strategy for prostate cancer treatment.
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