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Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
ANXA10 promotes melanoma metastasis by suppressing E3 ligase TRIM41-directed PKD1 degradation
Xuerui Zhang1, Zhaoqing Hu2, Xinran Wang2
1The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China; Changzhou High-Tech Research Institute of Nanjing University and Jiangsu Target Pharma Laboratories Inc., Changzhou, China.
Abstract:
Melanoma is a highly metastatic cancer that requires effective and targeted curative therapy. Annexin A10 (ANXA10), a member of the annexin family, is a calcium- and phospholipid-binding protein. Considerable evidence indicates that ANXA10 is involved in tumour progression, but little is known about its role in melanoma development. In this study, we find that ANXA10 expression is significantly upregulated, and correlates with melanoma progression. ANXA10 knockout profoundly reduces cell migration and the metastatic activity of melanoma. In addition, ANXA10 knockout induces the N- to E-cadherin switch by upregulating SMAD6, an inhibitory SMAD in the TGF-β/SMAD pathway. The negative regulation of SMAD6 by ANXA10 is dependent on PKD1. ANXA10 interacts with PKD1 and inhibits E3 ligase TRIM41-targeted PKD1 degradation. In B16F10 melanoma cells, protein levels of ANXA10 and PKD1 are inversely correlated with SMAD6 level, but correlated with cell migration. Interestingly, ANXA10 and SMAD6 levels are inversely correlated in clinical samples of melanoma progression. Our findings suggest that the ANXA10-PKD1-SMAD6 axis is a new target for therapeutic strategies against melanoma metastasis.
Insights
Annexin A10 (ANXA10) drives melanoma metastasis by inhibiting SMAD6. Blocking this ANXA10-PKD1-SMAD6 pathway may offer new melanoma treatment strategies.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Melanoma is a highly metastatic cancer requiring targeted therapies.
- Annexin A10 (ANXA10) is implicated in tumor progression, but its role in melanoma is unclear.
Purpose of the Study:
- To investigate the role of ANXA10 in melanoma progression and metastasis.
- To elucidate the molecular mechanisms underlying ANXA10's function in melanoma.
Main Methods:
- ANXA10 knockout in melanoma cells.
- Analysis of cell migration and metastatic activity.
- Investigation of the TGF-β/SMAD pathway, including SMAD6, PKD1, and TRIM41 interactions.
- Correlation analysis in melanoma cell lines and clinical samples.
Main Results:
- ANXA10 expression is upregulated and correlates with melanoma progression.
- ANXA10 knockout significantly reduces melanoma cell migration and metastasis.
- ANXA10 knockout induces an N- to E-cadherin switch via SMAD6 upregulation.
- ANXA10 interacts with PKD1, inhibiting TRIM41-mediated PKD1 degradation and thus SMAD6 suppression.
Conclusions:
- The ANXA10-PKD1-SMAD6 axis plays a critical role in melanoma metastasis.
- Targeting this axis presents a potential therapeutic strategy for melanoma treatment.
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