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Glioma‑initiating cells are a small population of cells that have the ability to undergo self‑renewal and initiate tumorigenesis. In the present study, the potential role of salinomycin, a polyether antibiotic, on the suppression of glioma cell growth was investigated. GL261 glioma cells were maintained in a stem‑cell‑like status [GL261 neurospheres (GL261‑NS)] or induced for differentiation [GL261 adherent cells (GL261‑AC)]. It was demonstrated that salinomycin significantly reduced the cell viability of GL261‑NS and GL261‑AC cells in a dose‑dependent manner, with a more substantial inhibition of GL261‑NS proliferation (P&lt;0.05). The inhibitory effect of salinomycin on cell growth was more effective than that of 1‑(4‑amino‑2‑methyl‑5‑pyrimid l)‑methyl‑3‑(2‑chloroethyl)‑3‑nitrosourea hydrochloride and vincristine (P&lt;0.05). Salinomycin depleted GL261‑NS from tumorspheres and induced cell apoptosis. In addition, salinomycin prolonged the median survival time of glioma‑bearing mice (P&lt;0.05). Therefore, the present study indicated that salinomycin may preferentially inhibit glioma‑initiated cell growth by inducing apoptosis, suggesting that salinomycin may provide a valuable therapeutic strategy for the treatment of malignant glioma.

Salinomycin inhibits the tumor growth of glioma stem cells by selectively suppressing glioma-initiating cells