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. 2017 Nov 24;7:16236. doi: 10.1038/s41598-017-16591-z

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) BSA and (b) scavenger receptor content of protein-SiNP complexes. Protein-SiNP complexes formed from SiNPs-NH₂ bind to scavenger receptors while complexes formed from SiNPs-COOH bind to native protein receptors. (c) Confocal images of the SiNPs-NH₂ and SR-SiNPs-NH₂ co-localized with lysosome in BCSCs after 1 h incubation. (d) MFI of at least 10,000 BCSCs, which was analyzed by FCM without or with SiNPs-NH₂ and SR-SiNPs-NH₂ treatment for 1 and 24 h. *p < 0.05; **p < 0.01 BCSCs versus MCF-7 in each group of SiNPs. ^##p < 0.01 SiNPs-OH versus SiNPs-NH₂ versus SiNPs-COOH in each cells type.