Format

Send to:

Choose Destination
See comment in PubMed Commons below
Nanomedicine. 2008 Sep;4(3):226-36. doi: 10.1016/j.nano.2008.04.001. Epub 2008 May 23.

Surface chemistry influences cancer killing effect of TiO2 nanoparticles.

Author information

  • 1Bioengineering Department, University of Texas at Arlington, Arlington, Texas 76019-0138, USA.

Abstract

Photocatalyzed titanium dioxide (TiO2) nanoparticles have been shown to eradicate cancer cells. However, the required in situ introduction of ultraviolet light limits the use of such a therapy in humans. In the present study the nonphotocatalytic anticancer effect of surface-functionalized TiO2 was examined. Nanoparticles bearing -OH, -NH(2), or -COOH surface groups were tested for their effect on in vitro survival of several cancer and control cell lines. The cells tested included B16F10 melanoma, Lewis lung carcinoma, JHU prostate cancer cells, and 3T3 fibroblasts. Cell viability was observed to depend on particle concentrations, cell types, and surface chemistry. Specifically, -NH(2) and -OH groups showed significantly higher toxicity than -COOH. Microscopic and spectrophotometric studies revealed nanoparticle-mediated cell membrane disruption leading to cell death. The results suggest that functionalized TiO2, and presumably other nanoparticles, can be surface-engineered for targeted cancer therapy.

PMID:
18502186
[PubMed - indexed for MEDLINE]
PMCID:
PMC2597280
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Write to the Help Desk