Figure 4.

Expression levels of amyloid precursor protein (APP) after exposure to the two types of silica dust. Astrocytoma cells were exposed for 24 and 48 h with the indicated doses. mRNA expression was investigated by qPCR. (A) APP mRNA expression levels; (B) APP protein expression levels. Representative western blot images are shown; (C) Quantification of APP expression. An average from three independent experiments is shown. Values represent the mean ± standard error (SE) of two independent experiments performed in triplicate. * p < 0.05 between exposed cells and the sham-treated control. Error bars: SE.