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Updated: Jul 19, 2026
Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
TANGO is a tumor suppressor of malignant melanoma
Stephanie Arndt1, Anja K Bosserhoff
1Institute of Pathology, Molecular Pathology, University of Regensburg, Germany.
Abstract:
The TANGO gene was originally identified as a new family member of the melanoma inhibitory activity gene family. The gene codes for a 14 kDa protein of so far unknown function. In our study we revealed that TANGO was downregulated or lost in 9 melanoma cell lines when compared to normal melanocytes and in most of the 8 tumor samples analyzed. The losses were associated with advanced stage of the disease. These results were confirmed in situ by immunohistochemistry on 10 paraffin-embedded sections of human malignant melanoma primary tumors and melanoma skin metastases. A small reduction of TANGO was also seen in different benign and atypical nevi when compared to normal skin. For functional analysis of TANGO we evaluated TANGO re-expressing melanoma cell clones and antisense TANGO cell clones with a complete loss of TANGO. Functional assays with TANGO transfected or treated cell lines revealed that TANGO expression reduces motility, whereas reduction of TANGO enhances migration. Our studies, therefore, indicate that reduction of TANGO expression contributes to tumor progression. These results taken together provide the first indications for a tumor suppressor role of TANGO gene in human malignant melanoma.
Insights
The TANGO gene, implicated in melanoma, is often lost in tumors, suggesting a tumor suppressor role. Reduced TANGO expression correlates with advanced melanoma and increased cell migration, impacting tumor progression.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- The TANGO gene, a member of the melanoma inhibitory activity gene family, encodes a protein with an unknown function.
- TANGO's role in melanoma development and progression has not been previously established.
Purpose of the Study:
- To investigate the expression levels and functional role of the TANGO gene in human malignant melanoma.
- To determine if TANGO alterations are associated with melanoma progression and metastasis.
Main Methods:
- Quantitative analysis of TANGO gene expression in melanoma cell lines and tumor samples.
- Immunohistochemistry on melanoma tissues to confirm protein expression.
- Functional studies using melanoma cell lines with manipulated TANGO expression (re-expression and knockdown).
Main Results:
- TANGO was downregulated or lost in 9 melanoma cell lines and 8 tumor samples compared to normal melanocytes.
- Loss of TANGO expression correlated with advanced melanoma stages and was observed in nevi.
- Reduced TANGO expression enhanced melanoma cell migration and motility, while TANGO re-expression reduced it.
Conclusions:
- TANGO gene downregulation or loss contributes to melanoma progression.
- The findings suggest a tumor suppressor role for the TANGO gene in human malignant melanoma.
- TANGO may serve as a potential biomarker for melanoma progression.
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