Effect of LPS on plasma GSH, GSSG, Eh GSH/GSSG, and total GSH. C57BL/6 mice were treated with 1 mg/kg intraperitoneal LPS or with PBS. At 2, 6, 24, and 48 hours, mice were killed and plasma was collected for HPLC analysis of (A) GSH and (B) GSSG. In C, Eh GSH/GSSG was calculated from the GSH and GSSG concentrations using the Nernst equation. (D) Total GSH equivalents were obtained by adding together GSH + 2*GSSG. Data are expressed as means ± SEM. aValues significantly different from ad libitum–fed PBS controls; bvalues significantly different from corresponding pair-fed PBS control.