ArticleJournal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology2026
Rapamycin Targets Cancer Stem Cells to Decrease Cisplatin Resistance in a Head and Neck Cancer Mouse Xenograft Model.
Article in Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundCisplatin is a common chemotherapeutic agent for advanced head and neck squamous cell carcinoma (HNSCC), but treatment success is often limited by resistance. Cancer stem cells (CSCs) are known contributors to this cisplatin chemoresistance in HNSCC. The mechanistic target of rapamycin (mTOR) pathway, which is frequently dysregulated in HNSCC, plays a crucial role via the PI3K/AKT/mTOR axis in maintaining CSC populations and promoting cancer proliferation. However, the specific effects of combining rapamycin, an mTOR pathway inhibitor, with chemotherapeutic agents on CSC maintenance and overall tumorigenicity remain unclear.
methodsWe examined CSC gene expression in HNSCC cell lines (HSC4, SCC25, OT-1109) and evaluated the therapeutic potential of combining rapamycin, an mTOR pathway inhibitor, with cisplatin on CSC using a cell viability assay. The combination was further evaluated in an HSC4 mouse xenograft model. Tumor volume and animal weight were monitored throughout treatment. Xenograft tissue analysis via immunohistochemistry assessed stem cell markers (CD133 and ALDH1A1), proliferation markers (Ki-67), and mTOR pathway inhibition (pS6).
resultsAdministration of low-dose cisplatin enriched the CD133
conclusionThese findings suggest that rapamycin enhances the mechanistic efficacy of cisplatin by specifically targeting and reducing cisplatin-induced stemness (CD133
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