title: A collagen-based multicellular tumor spheroid model for evaluation of the efficiency of nanoparticle drug delivery.
abstract: Targeted drug delivery systems, especially those that use nanoparticles, have been the focus of research into cancer therapy during the last decade, to improve the bioavailability and delivery of anticancer drugs to specific tumor sites, thereby reducing the toxicity and side effects to normal tissues. However, the positive antitumor effects of these nanocarriers observed in conventional monolayer cultures frequently fail in vivo, due to the lack of physical and biological barriers resembling those seen in the actual body. Therefore, the collagen-based 3-D multicellular culture system, to screen new nanocarriers for drug delivery and to obtain more adequate and better prediction of therapeutic outcomes in preclinical experiments, was developed. This 3-D culture model was successfully established using optimized density of cells. Our result showed that 3-D cell colonies were successfully developed from 95-D, U87 and HCT116 cell lines respectively, after a seven-day culture in the collagen matrix. The coumarin-conjugated nanoparticles were able to penetrate the matrix gel to reach the tumor cells. The model is supposedly more accurate in reflecting/predicting the dynamics and therapeutic outcomes of candidates for drug transport in vivo, and/or investigation of tumor biology, thus speeding up the pace of discovery of novel drug delivery systems for cancer therapy.
authors.affiliation: a Department of Molecular & Cellular Pharmacology , Biomedical Nanotechnology Center, State Key Laboratory of Bioreactor Engineering & Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology , Shanghai , P.R. China.
authors.forename: Van-Minh
authors.initials: VM
authors.lastname: Le
authors.affiliation: b Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai , China.
authors.forename: Mei-Dong
authors.initials: MD
authors.lastname: Lang
authors.affiliation: c Department of General Surgery , Xinhua Hospital, School of Medicine, Shanghai Jiaotong University , Shanghai , P.R. China.
authors.forename: Wei-Bin
authors.initials: WB
authors.lastname: Shi
authors.affiliation: a Department of Molecular & Cellular Pharmacology , Biomedical Nanotechnology Center, State Key Laboratory of Bioreactor Engineering & Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology , Shanghai , P.R. China.
authors.forename: Jian-Wen
authors.initials: JW
authors.lastname: Liu
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology; D001692:Biological Transport; D002452:Cell Count; D045744:Cell Line, Tumor; D003094:Collagen / Q000737:chemistry*; D004337:Drug Carriers / Q000737:chemistry* / Q000633:toxicity; D006801:Humans; D053758:Nanoparticles / Q000737:chemistry* / Q000378:metabolism / Q000633:toxicity; D018874:Spheroids, Cellular / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism
chemical_list: D000970:Antineoplastic Agents; D004337:Drug Carriers; D003094:Collagen
keywords: cancer; drug delivery system; nanoparticles; three dimensional model; tissue engineering