title: Biomarkerless targeting and photothermal cancer cell killing by surface-electrically-charged superparamagnetic Fe3O4composite nanoparticles.
abstract: A major challenge in cancer therapy is localized targeting of cancer cells for maximum therapeutic effectiveness. However, due to cancer heterogeneities, the biomarkers are either not readily available or specific for effective targeting of cancer cells. The key, therefore, is to develop a new targeting strategy that does not rely on biomarkers. A general hallmark of cancer cells is the much increased level of glycolysis. The loss of highly mobile lactate from the cytoplasm inevitably removes labile inorganic cations to form lactate salts and acids as part of the lactate cycle, creating a net of negative surface charges. This net of negative charges on cancer cell surfaces biophysically distinguishes themselves from normal cells. In this study, cancer cells are targeted by using positively-charged, fluorescent, superparamagnetic Fe3O4-composite nanoparticles. The positively-charged Fe3O4composite nanoparticles bind predominantly to cancer cells due to their negatively-charged surfaces. Upon electrical-charge-mediated Fe3O4nanoparticle binding onto cancer cells, irradiation by using an 808 nm laser is subsequently applied to induce photothermal hyperthermia that kills the cancer cells directly. The negatively-charged composite nanoparticles are found, however, not to target and bind the cancer cells due to the electrostatic repulsive force between them. This unique strategy paves a new path for effective targeting and direct cancer cell killing without relying on any biomarkers and anticancer drugs.
authors.affiliation: School of Materials Science and Engineering, Tongji University, Shanghai 200092, PR China and The Institute for Translational Nanomedicine, Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200092, PR China. yilongwang@tongji.edu.cn donglu.shi@uc.edu.
authors.forename: Xiao
authors.initials: X
authors.lastname: Han
authors.affiliation: School of Materials Science and Engineering, Tongji University, Shanghai 200092, PR China and The Institute for Translational Nanomedicine, Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200092, PR China. yilongwang@tongji.edu.cn donglu.shi@uc.edu.
authors.forename: Zicheng
authors.initials: Z
authors.lastname: Deng
authors.affiliation: School of Materials Science and Engineering, Tongji University, Shanghai 200092, PR China and The Institute for Translational Nanomedicine, Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200092, PR China. yilongwang@tongji.edu.cn donglu.shi@uc.edu.
authors.forename: Zi
authors.initials: Z
authors.lastname: Yang
authors.affiliation: The Institute for Translational Nanomedicine, Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200092, PR China. yilongwang@tongji.edu.cn donglu.shi@uc.edu.
authors.forename: Yilong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: The Institute for Translational Nanomedicine, Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200092, PR China. yilongwang@tongji.edu.cn donglu.shi@uc.edu.
authors.forename: Huanhuan
authors.initials: H
authors.lastname: Zhu
authors.affiliation: The Institute for Translational Nanomedicine, Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200092, PR China. yilongwang@tongji.edu.cn donglu.shi@uc.edu.
authors.forename: Bingdi
authors.initials: B
authors.lastname: Chen
authors.affiliation: The Institute for Translational Nanomedicine, Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200092, PR China. yilongwang@tongji.edu.cn donglu.shi@uc.edu and Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Cui
authors.affiliation: Department of Geological Sciences, Stanford University, Stanford, California 94025, USA.
authors.forename: Rodney C
authors.initials: RC
authors.lastname: Ewing
authors.affiliation: The Institute for Translational Nanomedicine, Shanghai East Hospital, the Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200092, PR China. yilongwang@tongji.edu.cn donglu.shi@uc.edu and The Materials Science and Engineering Program, Dept. of Mechanical and Materials Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio 45221, USA.
authors.forename: Donglu
authors.initials: D
authors.lastname: Shi
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage*; D006367:HeLa Cells; D006358:Hot Temperature; D061307:Human Umbilical Vein Endothelial Cells; D006801:Humans; D058185:Magnetite Nanoparticles; D009369:Neoplasms / Q000628:therapy*; D010789:Phototherapy; D055672:Static Electricity
chemical_list: D000970:Antineoplastic Agents; D058185:Magnetite Nanoparticles