Research Article

Pueraria lobata and Daidzein Reduce Cytotoxicity by Enhancing Ubiquitin-Proteasome System Function in SCA3-iPSC-Derived Neurons

Figure 5

Elevated cytotoxicity and caspase 3 expression/activity in MG132-treated iPSC-derived neurons. (a) Lactic dehydrogenase (LDH) release in culture media was measured to evaluate cytotoxicity. LDH level of untreated neurons was normalized as 100%. (b) Western blot analysis of the cleaved caspase 3 level (normalized to TUJ1 as the internal control). Cleaved caspase 3 level of 2 μM MG132-treated NC-iPSC-derived neurons (NC-1 and NC-2) was set as 100%. (c) Caspase 3 activity assay of NC- and SCA3-iPSC-derived neurons. Caspase 3 activity of untreated neurons was normalized as 100%. Each experiment for each sample was performed in triplicate. values: MG132-treated vs. untreated, , , and ; SCA3-1 vs. NC-1 or SCA3-2 vs. NC-2, &, &&, and &&&.
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