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FSBP suppresses tumor cell migration by inhibiting the JNK pathway
Fangyu Song1, Wenshuo Zhang1,2, Xiaohui Li1
1College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China.
Abstract:
The main cause of high mortality in cancer patients is tumor metastasis. Exploring the underlying mechanism of tumor metastasis is of great significance for clinical treatments. Here, we identify the transcription factor Apt/FSBP is a suppressor for tumor metastasis. In Drosophila wing disc, knockdown of apt is able to trigger cell migration, whereas overexpression of apt hampers scrib-RNAi-induced tumor cell migration. Further studies show that loss of apt promotes cell migration through activating the JNK pathway. To investigate the role of FSBP, the homolog of Apt in mammals, we construct Fsbp liver-specific knockout mice. Knockout of Fsbp in liver does not cause any detectable physiological defects, but predisposes to tumorigenesis on DEN and CCl4 treatment. In addition, loss of Fsbp accelerates tumor metastasis from liver to diaphragm. Taken together, this study uncovers FSBP is a novel tumor suppressor, and provides it as a considerable drug target for tumor treatment.
Insights
This study identifies Apt/FSBP as a tumor suppressor. Loss of Apt/FSBP promotes cancer cell migration and metastasis, highlighting its potential as a therapeutic target.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- Tumor metastasis is a primary cause of cancer mortality.
- Understanding metastasis mechanisms is crucial for effective clinical treatments.
Purpose of the Study:
- To identify novel regulators of tumor metastasis.
- To investigate the role of Apt/FSBP in tumor suppression and metastasis.
Main Methods:
- Utilized *Drosophila* wing disc models to study Apt function.
- Generated liver-specific *Fsbp* knockout mice for in vivo studies.
- Investigated the effect of Apt/FSBP on cell migration and JNK pathway activation.
Main Results:
- Knockdown of *apt* in *Drosophila* induced cell migration.
- Overexpression of *apt* inhibited *scrib*-RNAi-induced migration.
- Loss of *Fsbp* in mice promoted liver tumorigenesis and accelerated metastasis.
- Apt/FSBP loss activates the JNK pathway, promoting cell migration.
Conclusions:
- Apt/FSBP acts as a tumor suppressor, inhibiting metastasis.
- FSBP is a potential therapeutic target for combating cancer metastasis.
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