OGD treatment increased tonic current through an oxidative reaction. OGD treatment increased tonic current through an oxidative reaction. A, Reperfusion after OGD increased tonic current; n = 9, **p = 0.006, Student's paired t test. B, C, The increase in tonic current by reperfusion was abolished and a decrease after reperfusion was observed for neurons treated with the antioxidant GSH (1 mm; B) or pretreated for 30 min with NADPH oxidase inhibitor DPI (10 μm; C). Student's paired t test; n = 7, *p = 0.03 for B; n = 7, ***p < 0.001 for C. Antonello Penna et al. J. Neurosci. 2014;34:10624-10634 ©2014 by Society for Neuroscience