Table 1.

Silica NPs alter GSH concentration of PBMCs

Cellular treatment and condition	Mean ± SEM (N)*
Untreated control cells showing no stress	24 ± 0.9 (351)
Cells exposed to 100-nm particles and showing no stress	60 ± 2.8 (130)
Cells exposed to 100-nm particles and showing stress	5 ± 1.2 (48)
Cells exposed to 10-nm particles and showing no stress	76 ± 3.8 (264)
Cells exposed to 10-nm particles and showing stress	13 ± 2.0 (28)

*GSH concentration is presented as the mean number of gold particles, indicating GSH, per square micron ± S.E.M. N is the total number of 0.5 micron squared areas where gold particles were counted in each group. Each group was compared with each other using the Student’s t test and was found to be significantly different from each other using the P-level of 0.005.