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Apoptosis induced by ZnPcH1-based photodynamic therapy in Jurkat cells and HEL cells
Huifang Huang1, Xiaoyan Zhao, Yuanzhong Chen
1Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, 29 Xinquan Road, Fuzhou 350001, People's Republic of China.
Abstract:
Photodynamic therapy (PDT) can selectively and effectively kill tumor cells, and photosensitization is the key to these anti-tumor effects. In this study, we investigated the killing mechanisms of the photosensitizer ZnPcH1 (a mono-α-substituted zinc(II) phthalocyanine synthesized in China), in the acute lymphoid leukemia cell line Jurkat and the acute erythroleukemia cell line HEL. Results from acridine orange/ethidium bromide fluorescence staining, DNA gel electrophoresis, and Annexin-V(FITC/PI) double-stained flow cytometry analysis indicated that ZnPcH1-PDT induced apoptosis in Jurkat and HEL cells, with Jurkat cells being more sensitive. Following ZnPcH1-PDT treatment, upregulation of p53 and Bax, downregulation of HSP70, Bcl-2 and Akt, and inhibition of the phosphorylation of Akt and GSK3β were observed. Our results establish a theoretical basis for the application of ZnPcH1-PDT in the treatment of acute leukemia.
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