title: Hypocrellin-loaded gold nanocages with high two-photon efficiency for photothermal/photodynamic cancer therapy in vitro.
abstract: A new bioconjugate nanostructure was constructed by using photosensitizer-incorporated mixed lipid-coated gold nanocages for two-photon photothermal/photodynamic cancer therapy in vitro with high efficiency. Scanning electron microscopic and transmission electron microscopic images reveal that the precursors and bioconjugate nanostructure as-prepared are narrowly dispersed and possess uniform morphologies. The relevant energy dispersion X-ray analysis and UV-vis spectra indicate that the bioconjugate nanostructure above was assembled successfully and has a strong absorption in the near-infrared region. Fluorescence and electronic spin resonance results show that the gold nanocage in the bioconjugate nanostructure can dramatically quench the photosensitizer and inhibit the production of singlet oxygen, which is supposed to alleviate the photosensitizers' unwanted side effects originating from their nontargeted distribution. We have demonstrated that as the nanocomplex is internalized by cancer cells, under two-photon illumination, photodynamic anticancer treatment is dramatically enhanced by the photothermal effect.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Lab of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Gao
authors.forename: Jinbo
authors.initials: J
authors.lastname: Fei
authors.forename: Jie
authors.initials: J
authors.lastname: Zhao
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.forename: Yue
authors.initials: Y
authors.lastname: Cui
authors.forename: Junbai
authors.initials: J
authors.lastname: Li
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage; D017209:Apoptosis / Q000187:drug effects / Q000528:radiation effects; D004058:Diffusion; D006046:Gold / Q000737:chemistry*; D006367:HeLa Cells; D006801:Humans; D053768:Metal Nanoparticles / Q000008:administration & dosage / Q000737:chemistry; D053769:Nanocapsules / Q000008:administration & dosage* / Q000737:chemistry*; D010569:Perylene / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000737:chemistry; D019800:Phenol; D010778:Photochemotherapy / Q000379:methods*; D017319:Photosensitizing Agents / Q000008:administration & dosage*; D011809:Quinones / Q000008:administration & dosage* / Q000737:chemistry*
chemical_list: D000970:Antineoplastic Agents; D053769:Nanocapsules; D017319:Photosensitizing Agents; D011809:Quinones; D019800:Phenol; D010569:Perylene; D006046:Gold; C048388:hypocrellin A