Fig. 8
From: Chronic effects of two rutile TiO2 nanomaterials in human intestinal and hepatic cell lines
Histogram comparisons of ion yields for characteristic biomarker ions which were used to separate the four treatment groups in Caco-2 cells (unexposed control cells (2 weeks), cells exposed to TiO2 NMs for 2 weeks, 1 week and a washout period of 1 week). Representative biomarker ions for Caco-2 cells treated with NM-103 (a, c) and NM-104 (b, d) are presented. The biomarker ions indicate a full recovery of the cell membrane pattern to unexposed controls. For the relative intensity, the mean of the control group exposed for 2 weeks was taken as 100% in all cases