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. 2022 Jul 11;119(29):e2203994119. doi: 10.1073/pnas.2203994119

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Copyright © 2022 the Author(s). Published by PNAS.

This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).

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Fig. 4. — Cell viability of (A) human embryonic kidney 293 (HEK293) cells and (B) U87 cells after treatment with 4 and 2 in the absence or presence of laser irradiation. (C) Confocal laser scanning microscopy images of untreated (blank) cells and cells treated with 4 or 2 in the presence of the singlet oxygen detector, dichlorofluorescin diacetate (DCF-DA) under light irradiation. Confocal laser scanning microscopy images and mean fluorescence intensities of human primary glioblastoma (U87) cells after incubation with (D) ligand 4 or (E) metallacycle 2.