PMID- 19344179 OWN - NLM STAT- MEDLINE DCOM- 20090702 LR - 20240109 IS - 1530-6992 (Electronic) IS - 1530-6984 (Linking) VI - 9 IP - 5 DP - 2009 May TI - Mediating tumor targeting efficiency of nanoparticles through design. PG - 1909-15 LID - 10.1021/nl900031y [doi] AB - Here we systematically examined the effect of nanoparticle size (10-100 nm) and surface chemistry (i.e., poly(ethylene glycol)) on passive targeting of tumors in vivo. We found that the physical and chemical properties of the nanoparticles influenced their pharmacokinetic behavior, which ultimately determined their tumor accumulation capacity. Interestingly, the permeation of nanoparticles within the tumor is highly dependent on the overall size of the nanoparticle, where larger nanoparticles appear to stay near the vasculature while smaller nanoparticles rapidly diffuse throughout the tumor matrix. Our results provide design parameters for engineering nanoparticles for optimized tumor targeting of contrast agents and therapeutics. FAU - Perrault, Steven D AU - Perrault SD AD - Institute of Biomaterials and Biomedical Engineering, Terrence Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON, M5S 3E1, Canada. FAU - Walkey, Carl AU - Walkey C FAU - Jennings, Travis AU - Jennings T FAU - Fischer, Hans C AU - Fischer HC FAU - Chan, Warren C W AU - Chan WC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Nano Lett JT - Nano letters JID - 101088070 RN - 3WJQ0SDW1A (Polyethylene Glycols) RN - 7440-57-5 (Gold) SB - IM MH - Animals MH - Cell Line, Tumor MH - Gold/*chemistry MH - Metal Nanoparticles/*chemistry MH - Mice MH - Neoplasms/*metabolism MH - Particle Size MH - Permeability MH - Polyethylene Glycols/*chemistry MH - Xenograft Model Antitumor Assays EDAT- 2009/04/07 09:00 MHDA- 2009/07/03 09:00 CRDT- 2009/04/07 09:00 PHST- 2009/04/07 09:00 [entrez] PHST- 2009/04/07 09:00 [pubmed] PHST- 2009/07/03 09:00 [medline] AID - 10.1021/nl900031y [doi] PST - ppublish SO - Nano Lett. 2009 May;9(5):1909-15. doi: 10.1021/nl900031y.