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Role of Inflammatory Bone Markers in the Antidepressant Actions of (R)-Ketamine in a Chronic Social Defeat Stress Model

Kai Zhang, Min Ma, Chao Dong, Kenji Hashimoto

The International Journal of Neuropsychopharmacology July 17, 2018 DOI: 10.1093/ijnp/pyy065 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Preclinical animal study Peer reviewed
Population Chronic social defeat stress-susceptible mice
Interventions (R)-ketamine (S)-ketamine
Topics Esketamine Ketamine
Citations 30
Key points (R)-ketamine showed more potent antidepressant-like behavioral effects than (S)-ketamine in chronically stressed mice, and (R)-ketamine but not (S)-ketamine significantly attenuated elevated plasma receptor activator of nuclear factor κB ligand. Sucrose preference correlated positively with the osteoprotegerin/receptor activator of nuclear factor κB ligand ratio, which the authors propose indicates inflammatory bone markers may play a role in (R)-ketamine's antidepressant effects.

Abstract

Background: A recent study demonstrated that inflammatory bone markers play a role in the antidepressant functions of (R,S)-ketamine in treatment-resistant patients with depression. We examined the effect of inflammatory bone markers in the antidepressant functions of (R)-ketamine and (S)-ketamine in a chronic social defeat stress model.

Methods: Behavioral tests for antidepressant actions were performed after a single administration of (R)-ketamine or (S)-ketamine. We measured inflammatory bone marker levels in the plasma, which included osteoprotegerin, receptor activator of nuclear factor κB ligand, and osteopontin.

Results: (R)-ketamine's antidepressant effects were more potent than those of (S)-ketamine in the behavioral tests. Furthermore, (R)-ketamine but not (S)-ketamine significantly attenuated increased plasma levels of receptor activator of nuclear factor κB ligand in chronic social defeat stress-susceptible mice. We found a positive correlation between sucrose preference and osteoprotegerin/receptor activator of nuclear factor κB ligand ratio.

Conclusions: Our findings demonstrate that inflammatory bone markers may play a role in the antidepressant effects of (R)-ketamine.

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