American Association for Cancer Research
00085472can122071-sup-meth_mfl1-4_tl1_42k.pdf (42.36 kB)

Supplementary Methods, Figure Legends 1-4, Table Legend 1 from Superior Penetration and Retention Behavior of 50 nm Gold Nanoparticles in Tumors

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journal contribution
posted on 2023-03-30, 21:42 authored by Shuaidong Huo, Huili Ma, Keyang Huang, Juan Liu, Tuo Wei, Shubin Jin, Jinchao Zhang, Shengtai He, Xing-Jie Liang

PDF file - 42K, Methods including Bio-TEM observation of spheroids and tumors, ICP-MS, HE staining, Flow cytometry and ESEM observation of MCF-7 spheroids and monolayer cells



Nanoparticles offer potential as drug delivery systems for chemotherapeutics based on certain advantages of molecular drugs. In this study, we report that particle size exerts great influence on the penetration and retention behavior of nanoparticles entering tumors. On comparing gold-coated Au@tiopronin nanoparticles that were prepared with identical coating and surface properties, we found that 50 nanoparticles were more effective in all in vitro, ex vivo, and in vivo assays conducted using MCF-7 breast cells as a model system. Beyond superior penetration in cultured cell monolayers, 50 nm Au@tiopronin nanoparticles also penetrated more deeply into tumor spheroids ex vivo and accumulated more effectively in tumor xenografts in vivo after a single intravenous dose. In contrast, larger gold-coated nanoparticles were primarily localized in the periphery of the tumor spheroid and around blood vessels, hindering deep penetration into tumors. We found multicellular spheroids to offer a simple ex vivo tumor model to simulate tumor tissue for screening the nanoparticle penetration behavior. Taken together, our findings define an optimal smaller size for nanoparticles that maximizes their effective accumulation in tumor tissue. Cancer Res; 73(1); 319–30. ©2012 AACR.