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Decreased TSPAN14 Expression Contributes to NSCLC Progression
Mirna Jovanović1, Tijana Stanković1, Sonja Stojković Burić1
1Department of Neurobiology, Institute for Biological Research "Siniša Stanković"-National Institute of the Republic of Serbia, University of Belgrade, Despota Stefana 142, 11060 Belgrade, Serbia.
Abstract:
Tspan14 is a transmembrane protein of the tetraspanin (Tspan) protein family. Different members of the Tspan family can promote or suppress tumor progression. The exact role of Tspan14 in tumor cells is unknown. Earlier, mutational inactivation of the TSPAN14 gene has been proposed to coincide with a low survival rate in NSCLC patients. This study aimed to investigate the correlation of TSPAN14 lack of function with clinicopathological features of NSCLC patients, and to elucidate the role TSPAN14 might have in NSCLC progression. TSPAN14 expression was lower in tumor cells than non-tumor cells in NSCLC patients' samples. The decreased gene expression was correlated with a low survival rate of patients and was more frequent in patients with aggressive, invasive tumor types. Additionally, the role of decreased TSPAN14 expression in the metastatic potential of cancer cells was confirmed in NSCLC cell lines. The highly invasive NSCLC cell line (NCI-H661) had the lowest TSPAN14 gene and protein expression, whereas the NSCLC cell line with the highest TSPAN14 expression (NCI-H460) had no significant metastatic potential. Finally, silencing of TSPAN14 in these non-metastatic cancer cells caused an increased expression of matrix-degrading enzymes MMP-2 and MMP-9, followed by an elevated capacity of cancer cells to degrade gelatin. The results of this study propose TSPAN14 expression as an indicator of NSCLC metastatic potential and progression.
Insights
Tetraspanin 14 (Tspan14) deficiency correlates with poor survival and increased metastasis in non-small cell lung cancer (NSCLC). Lower Tspan14 expression indicates higher tumor invasiveness and metastatic potential in NSCLC patients.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Tetraspanin (Tspan) proteins influence tumor progression, but Tspan14's role in cancer remains unclear.
- Previous findings suggest TSPAN14 gene inactivation correlates with reduced survival rates in non-small cell lung cancer (NSCLC) patients.
Purpose of the Study:
- To investigate the association between Tspan14 dysfunction and NSCLC clinicopathological features.
- To determine the role of Tspan14 in NSCLC progression and metastasis.
Main Methods:
- Analysis of TSPAN14 expression in NSCLC patient samples.
- Correlation of gene expression with patient survival and tumor aggressiveness.
- In vitro studies using NSCLC cell lines to assess metastatic potential.
- Gene silencing experiments to evaluate Tspan14's effect on matrix-degrading enzymes.
Main Results:
- TSPAN14 expression was significantly lower in NSCLC tumor cells compared to non-tumor cells.
- Decreased TSPAN14 expression correlated with lower patient survival and more aggressive tumor types.
- Reduced Tspan14 levels were linked to increased cancer cell metastatic potential in vitro.
- Silencing TSPAN14 upregulated MMP-2 and MMP-9, enhancing cancer cell gelatin degradation.
Conclusions:
- TSPAN14 expression serves as a potential biomarker for NSCLC metastatic potential and disease progression.
- Loss of Tspan14 function may drive NSCLC invasiveness through matrix degradation.
- Further research into Tspan14's regulatory mechanisms in NSCLC is warranted.
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