Tenascin-C Potentiates Wnt Signaling in Thyroid Cancer.

Area of Science:

• Oncology
• Molecular Biology
• Extracellular Matrix Biology

Background:

• Tenascin-C (TNC) is an extracellular matrix protein involved in development and disease.
• TNC and Wnt signaling are upregulated in anaplastic thyroid cancer (ATC).
• The precise role of TNC in ATC pathogenesis remains unclear.

Purpose of the Study:

• To investigate the role of Tenascin-C (TNC) in promoting ligand-dependent Wnt signaling in thyroid cancer.
• To determine if TNC contributes to the aggressive behavior of anaplastic thyroid cancer (ATC).

Main Methods:

• Bulk RNA-sequencing from three independent thyroid cancer patient cohorts.
• Spatial localization of TNC expression using RNA in situ hybridization.
• In vitro Wnt reporter assays and in vivo studies using a mouse ATC xenograft model.

Main Results:

• TNC expression correlated with aggressive ATC features like metastasis and extrathyroidal extension.
• TNC was highly expressed at the invasive tumor edge and in areas of intravascular invasion.
• In vitro and in vivo, TNC enhanced Wnt signaling, tumor burden, invasion, and metastasis.

Conclusions:

• Tenascin-C (TNC) potentiates Wnt signaling, driving cancer cell invasion and metastasis in ATC.
• TNC interaction with Wnt ligands presents potential therapeutic targets for thyroid cancer.
• Further research into TNC and Wnt pathways may yield novel biomarkers and treatments for ATC.