Apoptosis Induced by 2-Aryl Benzothiazoles-Mediated Photodynamic Therapy in Melanomas via Mitochondrial Dysfunction

作者：Chen, Yin-Kai; Senadi, Gopal Chandru; Lee, Chih-Hung; Tsai, Yi-Min; Chen, Yan-Ren; Hu, Wan-ping^*; Chou, Yu-Wei; Kuo, Kung-Kai; Wang, Jeh-Jeng

来源：Chemical Research in Toxicology, 2014, 27(7): 1187-1198.

DOI：10.1021/tx500080w

• ANTITUMOR BENZOTHIAZOLES
• METASTATIC MELANOMA
• CUTANEOUS MELANOMA
• PARALLEL SYNTHESIS
• AMMONIUM-NITRATE
• DNA MUTATIONS
• CYTOCHROME-C
• POTENT
• CELLS
• INTERLEUKIN-2

A mild and efficient synthetic development of 2-arylbenzothiazoles 5 mediated by ceric ammonium nitrate (CAN) via intramolecular cydization of N-phenyl-thiobenzamides 4 was achieved. Further compounds 5 were reduced to corresponding amines 6, and their photodynamic therapy (PDT) effect was evaluated on malignant human melanoma A375 cells. Amine 61 plus ultraviolet A (UVA) induced caspase-3 activity, poly(ADP-ribose)polymerase cleavage, M30 positive CytoDeath staining, and subsequent apoptotic cell death. Our data disclosed that treatment of A375 cells with 61 plus UVA resulted in a decrease in mitochondrial membrane potential (Mini), oxidative phosphorylation system (OXPHOS) subunits, and adenosine triphosphate (ATP) but an increase in mitochondrial DNA 4977-bp deletion via reactive oxygen species (ROS) generation. Transmission electron microscopy (TEM) observations also showed major ultrastructural alterations of mitochondria. Additionally, 61 plus UVA was also shown to reduce murine melanoma size in a mouse model. The present study supports the hypothesis that 6I-PDT may serve as a potential ancillary modality for the treatment of melanoma.

• 出版日期2014-7
• 单位长春大学