The DNA-binding, photocleavage, and antitumor activity of three free base pyridyl corroles 1, 2, and 3 have been investigated. The binding affinity toward CT-DNA decreases with increasing number of pentafluorophenyl, whereas the photocleavage activity toward pBR322 DNA becomes more efficient. Singlet oxygen was demonstrated as active species responsible for DNA cleavage. These corroles exhibited high cytotoxicity against three tested cancer cells (Hela, HapG2, and A549) and the cytotoxicity could be further enhanced under irradiation. Intracellular reactive oxygen species level was also monitored using HeLa Cells upon the combined treatment of corroles and light. These corroles could be absorbed by HeLa cells at low concentration. They can induce the decrease of mitochondrial membrane potential and apoptosis of tumor cells under irradiation.
The Journal of Membrane Biology – Springer Journals
Published: Feb 19, 2016
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