Enhanced NIR Radiation-Triggered Hyperthermia by Mitochondrial Targeting

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author Jong Seung Kim
journal J. Am. Chem. Soc. 2015, 137, 3017−3023
Homepage http://orgchem.korea.ac.kr/index2.asp
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Mitochondria are organelles that are readily susceptible to temperature elevation. We selectively delivered a coumarin-based fluorescent iron oxide nanoparticle, Mito-CIO, to the mitochondria. Upon 740 nm laser irradiation, the intracellular temperature of HeLa cells was elevated by 2.1 °C within 5 min when using Mito-CIO, and the treatment resulted in better hyperthermia and a more elevated cytotoxicity than HeLa cells treated with coumarin iron oxide (CIO), which was missing the mitochondrial targeting unit. We further confirmed these results in a tumor xenograft mouse model. To our knowledge, this is the first report of a near-infrared laser irradiation-induced hyperthermic particle targeted to mitochondria, enhancing the cytotoxicity in cancer cells. Our present work therefore may open a new direction in the development of photothermal therapeutics.


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http://pubs.acs.org/doi/abs/10.1021/ja5122809



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