New Hope Against Oral Cancer: Thienopyrimidines Show Strong Selectivity in Targeting Tumor Cells

Oral cancer continues to be a major health challenge worldwide, with oral squamous cell carcinoma (OSCC) ranking among the most aggressive and difficult-to-treat cancers of the head and neck. A new study by Prof. Biliana Nikolova and her research team at the Bulgarian Academy of Sciences has introduced a promising direction in selective cancer therapy using thienopyrimidine-based compounds.

Title: Targeting oral squamous cell carcinoma with thienopyrimidines

🧬 Research Insight

The research explored seven novel 2-substituted 4-amino-thieno[2,3-d]pyrimidines—originally designed as DPP-4 inhibitors—for their cytotoxic and selective effects against oral cancer cells. Tests were performed on SCC-9 and HSC-3 cell lines, along with normal HaCaT keratinocytes to evaluate compound safety and specificity.

🌟 Major Findings

  • Compound 6 stood out with the highest selectivity index (SI = 22.3 for SCC-9 and SI = 6.4 for HSC-3), showing strong anticancer potential.
  • Compound 4 also displayed impressive selectivity (SI = 12.8), while compound 5 performed comparably to doxorubicin.
  • Advanced biophysical analyses, including FACS, colony-forming, and cell migration assays, confirmed their ability to inhibit cancer cell growth and spread.
  • The study highlights compound 6 as a lead candidate for further development as a selective oral cancer therapeutic with reduced side effects on normal cells.

👩🔬 About the Scientist

Prof. Biliana Nikolova is a distinguished biophysicist specializing in the impact of electric fields and nanomedicine applications in cancer therapy. At the Institute of Biophysics and Biomedical Engineering, she leads pioneering research that bridges biophysics, electrotherapy, and biomedical engineering. Her work continues to inspire new strategies in targeted cancer treatment and tissue regeneration.


🌍 Presented At

🧫 International Conference on Cancer Science and Research
📅 November 17–19, 2025 | Singapore & Online
🌐 https://cancer.miconferences.com/


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