Recurrent Spindle Cell Carcinoma Shows Features of Mesenchymal Stem Cells

Area of Science:

• Oncology
• Cancer Biology
• Stem Cell Research

Background:

• Spindle cell carcinoma (SpCC) is an aggressive cancer, often with poor prognosis.
• Investigating the cellular characteristics of recurrent SpCC is crucial for understanding treatment resistance.

Observation:

• A patient with recurrent tongue SpCC showed resistance to standard chemotherapy and cetuximab.
• Tumor cells expressed mesenchymal stem cell (MSC) markers (CD73, CD90, CD105) and exhibited multipotent differentiation.
• SpCC cells demonstrated vigorous mobilization and colony-forming unit fibroblast (CFU-F) activity.

Findings:

• The recurrent SpCC displayed mesenchymal, rather than epithelial, differentiation potential, resembling MSCs.
• The tumor cells were resistant to cetuximab, an epidermal growth factor receptor inhibitor.
• Imatinib, a tyrosine kinase inhibitor, effectively induced cell death in the SpCC cells.

Implications:

• This study highlights unique MSC-like characteristics in chemotherapy-resistant SpCC.
• Imatinib shows promise as a potential targeted therapy for SpCC with these specific characteristics.
• Further research into MSC-like properties of SpCC could lead to novel therapeutic approaches.