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. 2012 Feb 23;7(2):e32008. doi: 10.1371/journal.pone.0032008

Figure 3. Ex-4 is neuroprotective in NSC19 cells expressing either WT SOD1 or G37R SOD1.

Figure 3

(A) G37R SOD1 NSC19 cells are more vulnerable to oxidative stress (H2O2 (5 mM) for 24 h) than are WT SOD1 NSC19 cells. Cell viability assessed by MTS assay shows 22% cell survival in WT SOD1 cells v.s. 5% survival in G37R SOD1 cells (nā€Š=ā€Š6, * p<0.05). (B) Ex-4 reduced cell membrane permeability and protected cells from serum deprivation in both WT SOD1- and G37R SOD1-expressing NSC19 cells. Cells were cultured in no-serum media for 48 h in the presence and absence of 100 nM Ex-4. Cell viability was assessed by LDH assay. LDH levels were significantly reduced by Ex-4 treatment in both cells, under conditions of either Ex-4 alone or Ex-4 plus no-serum stress (C: vehicle-treated control; Ex-4: exendin-4; no serum: serum deprivation, nā€Š=ā€Š5, * p<0.05).