Figure 5

Biochemical markers for cell membrane damage, viability, and proliferation in MH-S cells at 24 hr post-exposure to ENM (3.125-100 μg/mL). (A) LDH concentrations in the culture medium (CM) from the MH-S cells, (B) cell viability based on metabolic activity of mitochondria, and (C) cell proliferation based on DNA content. Data are means ± SEM (n =3-6 in each group). *p <0.05 compared with CM-exposed negative control group. MH-S cells exposed to 1% Triton X-100 served as a positive control.