Enhanced NIR Radiation-Triggered Hyperthermia by Mitochondrial Targeting
作者:Hyo Sung Jung、Jiyou Han、Jae-Hong Lee、Ji Ha Lee、Jong-Min Choi、Hee-Seok Kweon、Ji Hye Han、Jong-Hoon Kim、Kyung Min Byun、Jong Hwa Jung、Chulhun Kang、Jong Seung Kim
DOI:10.1021/ja5122809
日期:2015.3.4
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 degrees 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.