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http://dx.doi.org/10.5487/TR.2013.29.1.035

Selective Effects of Curcumin on CdSe/ZnS Quantum-dot-induced Phototoxicity Using UVA Irradiation in Normal Human Lymphocytes and Leukemia Cells  

Goo, Soomin (School of Public Health and Institute of Health and Environment, Seoul National University)
Choi, Young Joo (School of Public Health and Institute of Health and Environment, Seoul National University)
Lee, Younghyun (School of Public Health and Institute of Health and Environment, Seoul National University)
Lee, Sunyeong (School of Public Health and Institute of Health and Environment, Seoul National University)
Chung, Hai Won (School of Public Health and Institute of Health and Environment, Seoul National University)
Publication Information
Toxicological Research / v.29, no.1, 2013 , pp. 35-42 More about this Journal
Abstract
Quantum dots (QDs) have received considerable attention due to their potential role in photosensitization during photodynamic therapy. Although QDS are attractive nanomaterials due to their novel and unique physicochemical properties, concerns about their toxicity remain. We suggest a combination strategy, CdSe/ZnS QDs together with curcumin, a natural yellow pigment from turmeric, to reduce QD-induced cytotoxicity. The aim of this study was to explore a potentially effective cancer treatment: co-exposure of HL-60 cells and human normal lymphocytes to CdSe/ZnS QDs and curcumin. Cell viability, apoptosis, reactive oxygen species (ROS) generation, and DNA damage induced by QDs and/or curcumin with or without ultraviolet A (UVA) irradiation were evaluated in both HL-60 cells and normal lymphocytes. In HL-60 cells, cell death, apoptosis, ROS generation, and single/double DNA strand breaks induced by QDs were enhanced by treatment with curcumin and UVA irradiation. The protective effects of curcumin on cell viability, apoptosis, and ROS generation were observed in normal lymphocytes, but not leukemia cells. These results demonstrated that treatment with QD combined with curcumin increased cell death in HL-60 cells, which was mediated by ROS generation. However, curcumin acted as an antioxidant in cultured human normal lymphocytes.
Keywords
CdSe/ZnS QDs; Curcumin; Apoptosis; Reactive oxygen species; DNA damage;
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