A single coadministration of subeffective doses of ascorbic acid and ketamine reverses the depressive-like behavior induced by chronic unpredictable stress in mice.

In this study, we investigated the ability of a single coadministration of subeffective doses of ascorbic acid and ketamine to reverse the depressive-like behavior induced by chronic unpredictable stress (CUS) in mice. Moreover, we examined the effect of combined administration of ascorbic acid and ketamine on hippocampal phosphorylation of p70S6K and immunocontents of GLUA1 and PSD-95 in mice submitted to the CUS procedure. CUS procedure was applied for 21 days. Animals received a single coadministration of subeffective doses of ascorbic acid (0.1 mg/kg) and ketamine (0.1 mg/kg) and were subjected to behavioral evaluation 24 h after the treatments. Immediately after the behavioral observations the hippocampi were dissected for Western blotting analyses. Our results revealed that a single administration of subeffective doses of ascorbic acid and ketamine completely reversed the depressive-like behavior induced by CUS, however, this effect was not accompanied by changes in the phosphorylation of p70S6K and immunocontent of GLUA1 or PSD95 in the hippocampus. These findings point to a synergistic antidepressant-like effect of ascorbic acid and ketamine, paving the way for additional studies on the combined use of these compounds for the management of major depressive disorder (MDD).
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