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[Inhibitory effect of transforming growth factor-β(1) on oral squamous cell carcinoma brain metastasis Tb cell line]
Cheng-min Liu1, Cheng-ren Zhang, Xiu-mei Wang
1Department of Stomatology, The Second Affiliated Hospital of Harbin Medical University, China.
Objective:
To investigate the inhibitory effect of transforming growth factor (TGF)-β₁ on oral squamous cell carcinoma (OSCC) Tb cell line.
Methods:
Cell counting method was used to examine the inhibitory effect of TGF-β₁ on Tb cell and flow cytometry (FCM) assay performed to measure the changes of cell cycle. Superarray was used to screen the changing expression of genes in TGF-β₁/Smads signaling pathway.RT-PCR method was used to detect the results of Superarray.
Results:
TGF-β₁ showed significant inhibiting effect on OSCC Tb cell line. TGF-β₁ blocked the cell cycle at G₁ phase. The expression level of activin receptor-like kinase-1 (ACVRL-1), anti-mullerian hirmine (AMH), cyclim-dependent kinase inhibitor-2B (CDKN-2B) and transforming growth factor-beta-indnced factor (TGIF) was higer in the cells treated with TGF-β₁ than in control, while TDGF-1 expression was down-regulated. ACVRL-1 and CDKN-2B gene expression was consistent with the results of Superarray.
Conclusions:
TGF-β₁ can inhibit the growth of OSCC Tb cell line. The mechanism may be related to the regulation of cell cycle and the expression of ACVRL-1 and CDKN-2B in TGF-β₁-Smads signaling pathway.
Insights
Transforming growth factor-beta-1 (TGF-β₁) inhibits oral squamous cell carcinoma (OSCC) growth by regulating the cell cycle and modulating gene expression within the TGF-β₁-Smads pathway.
Area of Science:
- Oncology
- Cell Biology
- Molecular Biology
Context:
- Oral squamous cell carcinoma (OSCC) is a prevalent oral cancer.
- Understanding the molecular mechanisms regulating OSCC proliferation is crucial for developing targeted therapies.
- Transforming growth factor-beta-1 (TGF-β₁) is a cytokine with complex roles in cancer, including potential tumor suppression.
Purpose:
- To investigate the inhibitory effect of TGF-β₁ on the OSCC Tb cell line.
- To elucidate the underlying molecular mechanisms, including cell cycle regulation and gene expression changes.
Summary:
- TGF-β₁ demonstrated a significant inhibitory effect on the proliferation of the OSCC Tb cell line.
- Flow cytometry analysis revealed that TGF-β₁ treatment blocked the cell cycle at the G₁ phase.
- Superarray and RT-PCR analyses identified altered gene expression, with increased levels of activin receptor-like kinase-1 (ACVRL-1) and cyclin-dependent kinase inhibitor-2B (CDKN-2B), and decreased levels of TDGF-1.
Impact:
- These findings suggest that TGF-β₁ possesses tumor-suppressive properties in OSCC.
- The study highlights the potential of targeting the TGF-β₁-Smads signaling pathway for therapeutic intervention in OSCC.
- Modulation of cell cycle progression and specific gene expression (ACVRL-1, CDKN-2B) represents a key mechanism of TGF-β₁'s inhibitory action.
