Background: Anhedonia and reward-processing deficits are core features of major depressive disorder (MDD) that respond poorly to traditional antidepressants.Ketamine has rapid antidepressant effects, yet its neurofunctional actions within reward circuits remain unclear.We synthesized human neuroimaging evidence on ketamine-related modulation of reward circuitry and implications for...
Intranasal esketamine represents a novel therapeutic option for Treatment-Resistant Depression (TRD). However, its medium-to-long-term risk-benefit profile in real-world clinical practice remains controversial. Limited data is available regarding its effectiveness, particularly in patients who have not responded to electroconvulsive therapy (ECT), which is the focus of this study. We conducted...
Treatment-resistant depression (TRD) accounts for approximately 30% of major depressive disorder cases and has been characterized by altered functional connectivity within and between the Default Mode (DMN) and Frontoparietal networks (FPN). Ketamine can be an effective treatment for TRD, and its antidepressant response has been associated with alterations in resting state functional...
Postoperative depression adversely influences breast cancer patients' clinical outcomes. Our prior study demonstrated that intraoperative esketamine ameliorated postoperative depression in breast cancer patients, yet the underlying neural mechanism remains incompletely understood. We performed a double-blind randomized controlled trial in 35 breast cancer patients with preoperative depressive...
Approximately 30% of patients with depression suffer from treatment-resistant depression (TRD). Ketamine has shown antidepressant efficacy for TRD. While glutamate α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) has been demonstrated to play crucial roles in the process of pharmacological action of ketamine in experimental animals, it remains elusive how ketamine exhibits...
Background Bipolar depression remains a leading cause of morbidity, functional impairment, and suicide risk in bipolar disorder. Conventional pharmacotherapies often provide delayed or incomplete relief and may increase the risk of treatment-emergent affective switching. Recent evidence highlights the therapeutic potential of NMDA receptor antagonists, particularly ketamine and its S-enantiomer...
Ketamine is a powerful and rapid-acting antidepressant but has no regulatory authorization for any psychiatric illness. The S-enantiomer of ketamine, esketamine, was approved by the FDA in 2019 as adjunctive therapy for treatment-resistant depression. Substantial controversy exists as to whether there is a significant clinical difference between intravenous (IV) ketamine racemate and intranasal...
Electroconvulsive therapy (ECT) has long been considered the main method of treatment for patients with resistant major depressive disorder (MDD). Recent studies have shown that ketamine infusion can also effectively improve treatment-resistant MDD. Thus, we conducted this meta-analysis to compare the efficacy of ketamine with ECT for treating treatment-resistant depression. We systematically...
Major depressive disorder (MDD) is increasingly viewed as a disorder of impaired neural plasticity, yet the mechanisms underlying diverse antidepressant classes - glutamatergic (e.g., ketamine), monoaminergic (e.g., selective serotonin reuptake inhibitors (SSRIs)), and GABAergic (e.g., neurosteroids) - remain incompletely integrated. The objective of this study was to extend a...
Psychospiritual distress (PSD) causes profound suffering in people with serious illness, yet treatment options are few and evidence of their efficacy is modest. Although high-level evidence is limited, decades of preliminary research suggest that psychedelic-assisted psychotherapy (PAP), including ketamine-assisted psychotherapy (KAP), may alleviate the anxiety, depression, and existential...