Figure 1.
β-estradiol attenuates acidosis-induced cytotoxicity. A and B, Viability and cytotoxicity in NS20Y cells and mouse cortical neurons were measured at 24 h after acid treatment by MTT and LDH assays. C, Representative phase-contrast images showing NS20Y cells taken after treatment with the indicated solutions (×200 magnification). D, Analysis of acid-induced injury with fluorescein diacetate (FDA, alive) and propidium iodide (PI, dead) (×200 magnification). ***P<0.001 versus control (pH 7.4). #P<0.05, ##P<0.01, ###P<0.001 versus pH 6.0.