Commenting on the effects of surface treated- and non-surface treated TiO2 in the Caco-2 cell model

James J. Faust, Wen Zhang, Brian A. Koeneman, Yongsheng Chen, David Capco

Research output: Contribution to journalLetter

5 Scopus citations


In a recent work published in Particle and Fibre Toxicology by Fisichella and coworkers investigating surface-modified TiO2 nanoparticle exposure in a model human intestinal epithelium (Caco-2), albeit degraded to mimic conditions in the gut and exposure to natural sunlight, purportedly resulted in no toxic effects. The authors (Fisichella et al.) claim to have confirmed the results of a 2010 report by Koeneman et al. However, the study by Koeneman and colleagues revealed significant effects of unmodified TiO2 nanoparticles. These contradicting data warrant further investigation into the possible effects of aluminum hydroxide, as these nanoparticles appear to have resulted in an abnormal apical surface in Caco-2 cells.

Original languageEnglish (US)
Article number42
JournalParticle and Fibre Toxicology
StatePublished - Nov 12 2012



  • Brush-border
  • Caco-2
  • Microvilli
  • Nanoparticles
  • Scanning electron microscopy
  • Titanium dioxide
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Toxicology
  • Health, Toxicology and Mutagenesis

Cite this