title: Polymeric nanoparticle preparation that eradicates tumors.
abstract: We report the production of poly(lactic-co-glycolic acid) nanoparticles that encapsulate the photosensitizer meso-tetraphenylporpholactol. These nanoparticles are stable and nonphototoxic upon systemic administration. Upon cellular internalization, the photosensitizer is released from the nanoparticle and becomes highly phototoxic. Irradiation with visible light results in cell-specific killing of several cancer cell lines. Importantly, in vivo experiments show complete eradication of cancers in mouse models. The concept of photosensitizers with selective phototoxicity should have widespread applications in cancer therapy.
authors.affiliation: MGH-Harvard Medical School, Center for Molecular Imaging Research, 149 13th Street, Room 5404, Charlestown, MA 02129, USA.
authors.forename: Jason R
authors.initials: JR
authors.lastname: McCarthy
authors.forename: J Manuel
authors.initials: JM
authors.lastname: Perez
authors.forename: Christian
authors.initials: C
authors.lastname: Brückner
authors.forename: Ralph
authors.initials: R
authors.lastname: Weissleder
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects / Q000528:radiation effects; D002470:Cell Survival / Q000187:drug effects / Q000528:radiation effects; D004058:Diffusion; D004337:Drug Carriers / Q000008:administration & dosage* / Q000737:chemistry*; D019344:Lactic Acid / Q000737:chemistry; D008297:Male; D051379:Mice; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D010778:Photochemotherapy / Q000379:methods*; D017319:Photosensitizing Agents / Q000008:administration & dosage* / Q000737:chemistry*; D011100:Polyglycolic Acid / Q000737:chemistry; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry; D011471:Prostatic Neoplasms / Q000188:drug therapy* / Q000473:pathology; D016896:Treatment Outcome
chemical_list: D004337:Drug Carriers; D017319:Photosensitizing Agents; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid