Blood-nanoparticle interactions and in vivo biodistribution: impact of surface PEG and ligand properties.

Blood-nanoparticle interactions and in vivo biodistribution: impact of surface PEG and ligand properties.
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DOI:
10.1021/mp200626j
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发表时间:
2012-08-06
影响因子:
4.9
通讯作者:
Bischof JC
Bischof JC
中科院分区:
医学2区
文献类型:
--
作者:
Shah NB;Vercellotti GM;White JG;Fegan A;Wagner CR;Bischof JC

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Theranostic nanoparticles (NPs) cannot reach their target tissue without first passing through blood, however, the influence of blood protein and blood cell interactions on NP biodistribution are not well understood. The current work shows that 30nm PEGylated gold NPs (GNPs) interact not only with blood proteins as thought before, but also with blood cells (esp. platelets and monocytes) in vivo and that longer blood circulation correlates strongly with tumor uptake. Further, GNP surface properties such as negative charge or lyophilization had either a minimal (i.e. charge) or 15 fold increase (i.e. fresh vs. lyophilized) in blood retention times and tumor uptake. Tumor accumulation was increased over 10 fold by use of a bioactive ligand (i.e. TNF) on the lyophilized GNP surface. Resident macrophages were primarily responsible for the bulk of GNP uptake in liver while spleen uptake was highly surface property dependent and appears to involve macrophages and cellular interaction between the red and white pulp. This study shows that the PEG layer and ligand on the surface of the NP are critical to blood interactions and eventual tumor and RES organ biodistribution in vivo.
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