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Published on: April 7, 2017
Rewiring of an epithelial differentiation factor, miR-203, to inhibit human squamous cell carcinoma metastasis
Nathan Benaich1, Samuel Woodhouse2, Stephen J Goldie3
1Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK; Centre for Stem Cells and Regenerative Medicine, King's College London, 28(th) Floor, Tower Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK.
Abstract:
Metastatic colonization of distant organs underpins the majority of human-cancer-related deaths, including deaths from head and neck squamous cell carcinoma (HNSCC). We report that miR-203, a miRNA that triggers differentiation in multilayered epithelia, inhibits multiple postextravasation events during HNSCC lung metastasis. Inducible reactivation of miR-203 in already established lung metastases reduces the overall metastatic burden. Using an integrated approach, we reveal that miR-203 inhibits metastasis independently of its effects on differentiation. In vivo genetic reconstitution experiments show that miR-203 inhibits lung metastasis by suppressing the prometastatic activities of three factors involved in cytoskeletal dynamics (LASP1), extracellular matrix remodeling (SPARC), and cell metabolism (NUAK1). Expression of miR-203 and its downstream effectors correlates with HNSCC overall survival outcomes, indicating the therapeutic potential of targeting this signaling axis.
Insights
MicroRNA-203 (miR-203) inhibits head and neck squamous cell carcinoma (HNSCC) lung metastasis by suppressing key prometastatic factors. Reactivating miR-203 can reduce tumor burden and improve survival outcomes in HNSCC patients.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Metastatic colonization drives most cancer deaths, including head and neck squamous cell carcinoma (HNSCC).
- MicroRNAs (miRNAs) play critical roles in cancer progression and metastasis.
- Understanding miRNA functions in HNSCC metastasis is crucial for developing targeted therapies.
Purpose of the Study:
- To investigate the role of miR-203 in HNSCC lung metastasis.
- To identify the mechanisms by which miR-203 inhibits metastasis.
- To evaluate the therapeutic potential of miR-203 in HNSCC.
Main Methods:
- In vivo genetic reconstitution experiments.
- Analysis of gene expression and protein levels.
- Correlation of miR-203 expression with patient survival outcomes.
Main Results:
- miR-203 inhibits multiple postextravasation events in HNSCC lung metastasis.
- Reactivation of miR-203 reduces overall metastatic burden in established lung metastases.
- miR-203 suppresses prometastatic factors LASP1, SPARC, and NUAK1, independent of its differentiation effects.
- miR-203 expression correlates with improved HNSCC patient survival.
Conclusions:
- miR-203 is a potent inhibitor of HNSCC lung metastasis.
- Targeting the miR-203 signaling axis holds therapeutic potential for HNSCC.
- miR-203's anti-metastatic function is mediated by suppressing cytoskeletal dynamics, ECM remodeling, and cell metabolism factors.
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