Lower Salinomycin Concentration Increases Apoptotic Detachment in High-Density Cancer Cells
- Authors
- Kim, Ju-Hwa; Kim, Tae Young; Kim, Hyung Sik; Hong, Suntaek; Yoon, Sungpil
- Issue Date
- Oct-2012
- Publisher
- MDPI AG
- Keywords
- salinomycin; apoptosis; high cell density; spaces among cells; cellular detachment; lower concentration
- Citation
- INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, v.13, no.10, pp.13169 - 13182
- Journal Title
- INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
- Volume
- 13
- Number
- 10
- Start Page
- 13169
- End Page
- 13182
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/16137
- DOI
- 10.3390/ijms131013169
- ISSN
- 1422-0067
- Abstract
- The present study identified a novel salinomycin (Sal) sensitization mechanism in cancer. We tested whether Sal reduced proliferation in a high-density population by counting attached cell numbers after Sal treatment. Sal reduced proliferation in high-density cell populations. Longer exposure to Sal further reduced proliferation. Sal concentrations of 0.1 and 5 mu M had similar sensitization effects, suggesting that Sal toxicity was minimal with longer exposure to a high-density cell population. The results suggest that Sal can be applied at a relatively low concentration for a longer time to overcome drug-resistant solid tumors. The 0.5 mu M Sal treatment resulted in fewer attached cells than that of the 5 mu M Sal treatment with a longer exposure. The lower Sal concentration mainly increased the number of easily detachable cells on the surface. In particular, 0.5 mu M Sal increased cellular detachment of newly produced daughter cells. The easily-detachable cells were undergoing apoptosis. It seems that the 0.5 mu M Sal treatment also increased cellular toxicity. These novel findings may contribute to the development of Sal-based therapy for patients with drug-resistant cancer or a high-density solid tumor.
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