Send to

Choose Destination
See comment in PubMed Commons below
Theranostics. 2012;2(1):66-75. doi: 10.7150/thno.3568. Epub 2012 Jan 1.

Penetration of endothelial cell coated multicellular tumor spheroids by iron oxide nanoparticles.

Author information

1. Department of Chemistry, Brown University, Providence, RI 02912.


Iron oxide nanoparticles are a useful diagnostic contrast agent and have great potential for therapeutic applications. Multiple emerging diagnostic and therapeutic applications and the numerous versatile parameters of the nanoparticle platform require a robust biological model for characterization and assessment. Here we investigate the use of iron oxide nanoparticles that target tumor vasculature, via the tumstatin peptide, in a novel three-dimensional tissue culture model. The developed tissue culture model more closely mimics the in vivo environment with a leaky endothelium coating around a glioma tumor mass. Tumstatin-iron oxide nanoparticles showed penetration and selective targeting to endothelial cell coating on the tumor in the three-dimensional model, and had approximately 2 times greater uptake in vitro and 2.7 times tumor neo-vascularization inhibition. Tumstatin provides targeting and therapeutic capabilities to the iron oxide nanoparticle diagnostic contrast agent platform. And the novel endothelial cell-coated tumor model provides an in vitro microtissue environment to evaluate nanoparticles without moving into costly and time-consuming animal models.


anti-angiogenesis; drug delivery; imaging; iron oxide nanoparticles; magnetic; multicellular tumor spheroids; nanoparticle; theranostic; tumor penetration; tumstatin

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Ivyspring International Publisher Icon for PubMed Central
    Loading ...
    Support Center