title: The performance of doxorubicin encapsulated in chitosan-dextran sulphate microparticles in an osteosarcoma model.
abstract: Osteosarcoma (OS) is the most common primary bone cancer affecting children and adolescents. It is potentially debilitating and fatal due to pulmonary metastasis. A common management strategy, chemotherapy, has a 10-year disease-free survival of approximately 60%. However, a targeted approach to OS tumor inhibition is still lacking, calling for improved management strategies. A frontline drug for OS, doxorubicin (DOX), causes multiple side-effects (example myelosuppression, heart failure, hepatic toxicity, alopecia) in patients, especially in high doses required to control tumor growth. A drug delivery system (DDS) was developed to deliver DOX specifically to tumor sites. Through DOX encapsulation into chitosan DDS via the complex coacervation method with dextran sulphate, novel DOX microparticles (DMPs), with a DOX loading content of more than 99%, were formed. Multiple optimisation steps produced DMPs which caused OS cell death through apoptosis, necrosis and autophagic cell death. Treatment of mice bearing orthotopic OS with DMP decreased tumor volume, decreased bone lysis, and reduced secondary metastasis to the lungs. DMP-treated mice also maintained their weight and did not appear to suffer from any visible side-effects such as heart failure or dry skin. Thus, DMP may prove to be a useful DDS platform clinically provided further studies are performed to rigorously validate this technology.
authors.affiliation: Department of Orthopaedics, St. Vincent's Hospital Melbourne, Fitzroy, VIC 3065, Australia.
authors.forename: Mei L
authors.initials: ML
authors.lastname: Tan
authors.forename: Anna M
authors.initials: AM
authors.lastname: Friedhuber
authors.forename: Dave E
authors.initials: DE
authors.lastname: Dunstan
authors.forename: Peter F M
authors.initials: PF
authors.lastname: Choong
authors.forename: Crispin R
authors.initials: CR
authors.lastname: Dass
mesh_terms: D000293:Adolescent; D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage / Q000737:chemistry / Q000627:therapeutic use; D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry / Q000378:metabolism; D002460:Cell Line; D002648:Child; D048271:Chitosan / Q000737:chemistry*; D016264:Dextran Sulfate / Q000737:chemistry*; D004317:Doxorubicin / Q000008:administration & dosage / Q000737:chemistry / Q000627:therapeutic use; D004337:Drug Carriers / Q000138:chemical synthesis / Q000737:chemistry / Q000378:metabolism; D004339:Drug Compounding; D016503:Drug Delivery Systems; D006801:Humans; D008297:Male; D008422:Materials Testing; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D008970:Molecular Weight; D009368:Neoplasm Transplantation; D012516:Osteosarcoma / Q000188:drug therapy*
chemical_list: D000903:Antibiotics, Antineoplastic; D001672:Biocompatible Materials; D004337:Drug Carriers; D004317:Doxorubicin; D048271:Chitosan; D016264:Dextran Sulfate