Tenascin-C Promotes Tumor Cell Migration and Metastasis through Integrin α9β1-Mediated YAP Inhibition
Zhen Sun1,2,3,4, Anja Schwenzer1,2,3,4, Tristan Rupp1,2,3,4
1INSERM U1109 - MN3T, The Microenvironmental Niche in Tumorigenesis and Targeted Therapy, Hôpital Civil, Institut d'Hématologie et d'Immunologie, Strasbourg, France.
Tenascin-C promotes cancer metastasis by activating integrin α9β1, which inhibits YAP signaling. This mechanism explains how tenascin-C drives tumor cell migration and progression in the tumor microenvironment.
Area of Science:
- Oncology
- Molecular Biology
- Extracellular Matrix Biology
Background:
- Tenascin-C is an extracellular matrix protein implicated in cancer progression.
- The precise mechanisms by which tenascin-C influences cancer cell behavior are not fully understood.
Purpose of the Study:
- To elucidate the cell-autonomous signaling pathway through which tenascin-C promotes cancer cell migration.
- To investigate the role of tenascin-C and its receptor integrin α9β1 in osteosarcoma metastasis.
Main Methods:
- Utilized a murine xenograft model of human osteosarcoma.
- Assessed the expression and function of tenascin-C and integrin α9β1.
- Analyzed the impact on YAP target gene expression and actin stress fiber formation.
Main Results:
- Tenascin-C and integrin α9β1 were essential for lung metastasis in osteosarcoma.
- Activation of the tenascin-C/integrin α9β1 pathway reduced YAP target gene expression.
- This pathway was linked to reduced actin stress fiber formation.
Conclusions:
- Tenascin-C promotes invasive migration and metastasis through integrin α9β1-mediated inhibition of YAP signaling.
- A YAP target gene signature has prognostic implications in clinical cancer specimens.
- These findings offer potential therapeutic targets for inhibiting cancer progression.
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