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Prophylactic effects of arketamine, but not hallucinogenic psychedelic DOI nor non-hallucinogenic psychedelic analog lisuride, in lipopolysaccharide-treated mice and mice exposed to chronic restrain stress.

Guilin Liu, Li Ma, Youge Qu, Xiayun Wan, Dan Xu, Mingming Zhao, Rumi Murayama, Kenji Hashimoto

Pharmacology, Biochemistry, and Behavior December 1, 2023 DOI: 10.1016/j.pbb.2023.173659 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Animal study Peer reviewed
Population Male mice
Interventions DOI lisuride arketamine
Dose DOI 2.0 or 4.0 mg/kg, lisuride 1.0 or 2.0 mg/kg, arketamine 10 mg/kg
Duration Pretreatment 6 days before LPS challenge or 1 day before 7-day chronic restraint stress
Topics Ketamine
Keywords Chronic stress Inflammation Prophylactic Psychedelic
Citations 16
Key points Arketamine, but not DOI or lisuride, showed long-lasting prophylactic effects against depression-like behaviors in LPS-treated and chronically stressed male mice.

Abstract

Anesthetic ketamine and classical psychedelics that act as 5-hydroxytryptamine-2A receptor (5-HT2AR) agonists demonstrated rapid and sustained antidepressant actions in patients with treatment-resistant depression. The new antidepressant arketamine is reported to cause long-lasting prophylactic effects in lipopolysaccharide (LPS)-treated mice and mice exposed to chronic restrain stress (CRS). However, no study has compared the prophylactic effects of DOI (2,5-dimethoxy-4-iodoamphetamine: a hallucinogenic psychedelic drug with potent 5-HT2AR agonism), lisuride (non-hallucinogenic psychedelic analog with 5-HT2AR and 5-HT1AR agonism), and arketamine on depression-like behaviors in mice. Saline (10 ml/kg), DOI (2.0 or 4.0 mg/kg), lisuride (1.0 or 2.0 mg/kg), or arketamine (10 mg/kg) was administered intraperitoneally (i.p.) to male mice 6 days before administration of LPS (1.0 mg/kg). Pretreatment with aketamine, but not DOI and lisuride, significantly ameliorated body weight loss, splenomegaly, the increased immobility time of forced swimming test (FST), and the decreased expression of PSD-95 in the prefrontal cortex (PFC) of LPS-treated mice. In another test, male mice received the same treatment one day before CRS (7 days). Pretreatment with aketamine, but not DOI and lisuride, significantly ameliorated the increased FST immobility time, the reduced sucrose preference in the sucrose preference test, and the decreased expression of PSD-95 in the PFC of CRS-exposed mice. These findings suggest that, unlike to arketamine, both DOI and lisuride did not exhibit long-lasting prophylactic effects in mouse models of depression.

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