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Expression of intact and phosphorylated ERK, p38 and JNK in Beas-2B cells exposed to 1 mg/L SiO2 nanoparticles. Densitometric values of expression of ERK, p38 and JNK were normalized using that of Actin and were presented as relative units compared to control. The control value was set to 1; data represent the mean ± standard error of the mean; n=3.
ERK: extracellular signal-regulating kinase, JNK: c-Jun N-terminal kinase, SiO2: silicon dioxide.
*p < 0.05, †p < 0.01.
