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Published on: January 21, 2012
RNA-Binding Protein RBMS3 Inhibits Cervical Cancer Progression by Enhancing HSPA6 mRNA Stability
Huaping Huang1,2, Ping Li3, Lixia Zhu2
1The Reproductive Medicine Center, The Second Affiliated Hospital of Soochow University, 215004 Suzhou, Jiangsu, China.
Background:
Cervical cancer (CC) is a prevalent malignancy in women. RNA-binding motif single-stranded interacting protein 3 (RBMS3) acts as a tumor suppressor in many cancer types, but its role and underlying regulatory mechanisms in CC remain unclear.
Methods:
The expression levels of RBMS3 and heat shock protein family A member 6 (HSPA6) were evaluated in clinical CC tissues. Gain- and loss-of-function assays, transcriptome sequencing, and rescue experiments were performed in CC cell lines and nude mouse xenograft models.
Results:
RBMS3 expression was notably lower in CC tissues (n = 306) than in normal cervical tissues (n = 22), with reduced levels linked to shorter overall patient survival (p < 0.05). Overexpression of RBMS3 reduced cell proliferation, migration, and invasion in vitro, as well as tumor growth in vivo (p < 0.001). HSPA6 was identified as a key target of RBMS3 and was also downregulated in CC tissues. RBMS3 potentially binds to HSPA6 mRNA and enhances its stability. Knockdown of HSPA6 reversed the tumor-suppressive effects of RBMS3 (p < 0.001).
Conclusions:
RBMS3 inhibits CC progression by stabilizing HSPA6 mRNA. The RBMS3-HSPA6 axis may represent a prognostic biomarker and therapeutic target in CC.
Insights
RNA-binding motif single-stranded interacting protein 3 (RBMS3) suppresses cervical cancer (CC) by stabilizing heat shock protein family A member 6 (HSPA6) mRNA. This RBMS3-HSPA6 interaction offers a potential therapeutic target for CC.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Cervical cancer (CC) is a common women's cancer.
- The tumor-suppressive role of RNA-binding motif single-stranded interacting protein 3 (RBMS3) in CC is not well understood.
Purpose of the Study:
- To investigate the function and regulatory mechanisms of RBMS3 in cervical cancer.
- To identify potential therapeutic targets for CC treatment.
Main Methods:
- Assessed RBMS3 and heat shock protein family A member 6 (HSPA6) expression in clinical CC tissues.
- Conducted gain- and loss-of-function assays, transcriptome sequencing, and xenograft studies in CC cell lines and mouse models.
Main Results:
- RBMS3 expression was significantly lower in CC tissues and correlated with reduced patient survival.
- RBMS3 overexpression inhibited CC cell proliferation, migration, invasion, and tumor growth.
- RBMS3 stabilizes HSPA6 mRNA, and HSPA6 knockdown reversed RBMS3's tumor-suppressive effects.
Conclusions:
- RBMS3 inhibits CC progression by enhancing HSPA6 mRNA stability.
- The RBMS3-HSPA6 pathway presents a potential prognostic biomarker and therapeutic target for cervical cancer.
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