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NFIB suppresses cell migration, invasion and EMT of bladder cancer through the PI3K-AKT signaling pathway
Lu Shen1, Chong Yu2, Yanqian Wu3
1Department of Clinical Laboratory, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, 310006 Zhejiang China.
Abstract:
NFIB, a pivotal transcription factor, intricately influences tumorigenesis by exerting dual roles as either an oncogenic promoter or a tumor-suppressive factor across a spectrum of tumor types. However, the specific impact of NFIB on bladder cancer remains poorly understood. This study aims to elucidate the biological function and molecular mechanism of NFIB in bladder cancer. We first found that the protein level of NFIB was downregulated in bladder cancer tissues compared to matched adjacent noncancerous tissues. Functional assays, including Wound healing and Transwell invasion assays, demonstrated that NFIB suppressed migration, invasion and epithelial-mesenchymal transition (EMT) of bladder cancer cells in vitro, wheras CCK8 assays showed NFIB had no significant effect on cell proliferation. In vivo experiments, including Xenograft and Nude mouse tail vein transfer assays, further supported these observations, indicating that NFIB inhibited lung metastasis of bladder cancer without affecting primary tumor growth. Finally, transcriptomic analysis confirmed that NFIB hindered the activation of the PI3K-AKT signaling pathway. Taken together, this study highlighted that NFIB serves as a tumor suppressor gene in bladder cancer, and suppresses cell migration, invasion and EMT through the modulation of the PI3K-AKT signaling pathway, revealing NFIB as a potential biomarker for monitoring early metastasis of bladder cancer and a target for therapy.
Supplementary Information:
The online version contains supplementary material available at 10.1007/s10616-026-00900-4.
Insights
Nuclear factor I B (NFIB) acts as a tumor suppressor in bladder cancer. It inhibits cell migration, invasion, and metastasis by downregulating the PI3K-AKT pathway, offering a potential therapeutic target.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Genetics
Background:
- Nuclear factor I B (NFIB) has a dual role in tumorigenesis, acting as either an oncogene or tumor suppressor depending on cancer type.
- The specific function of NFIB in bladder cancer pathogenesis is not well-defined.
Purpose of the Study:
- To investigate the biological role and molecular mechanisms of NFIB in bladder cancer.
- To determine NFIB's impact on bladder cancer cell behavior and metastasis.
Main Methods:
- Analysis of NFIB protein levels in bladder cancer tissues versus adjacent noncancerous tissues.
- In vitro functional assays (Wound healing, Transwell invasion, CCK8) to assess cell proliferation, migration, and invasion.
- In vivo experiments (Xenograft, Nude mouse tail vein transfer) to evaluate metastatic potential.
- Transcriptomic analysis to identify affected signaling pathways.
Main Results:
- NFIB protein expression is downregulated in bladder cancer tissues.
- NFIB suppresses bladder cancer cell migration, invasion, and epithelial-mesenchymal transition (EMT) in vitro.
- NFIB inhibits lung metastasis in vivo without affecting primary tumor growth.
- NFIB activation hinders the PI3K-AKT signaling pathway.
Conclusions:
- NFIB functions as a tumor suppressor gene in bladder cancer.
- NFIB inhibits bladder cancer cell migration, invasion, and EMT via the PI3K-AKT pathway.
- NFIB is a potential biomarker for early metastasis detection and a therapeutic target for bladder cancer.
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