Journal of Personalized Medicine
September 23, 2026
Aleksandra Metelska, Wojciech Ziemichód, Hanna Karakuła-juchnowicz
Objectives: A significant problem in the treatment of depressive disorders is the growing number of cases of so-called treatment-resistant depression (TRD). There is evidence of ketamine’s effectiveness in treating TRD, with response rates ranging from 40% to 90%. This review aimed to map available studies on peripheral biomarkers of response to ketamine and esketamine in the treatment of...
Neuropsychopharmacology
September 21, 2026
Balwinder Singh, Hossam M Ali, Alessandro Miola et al.
Disrupted excitation-inhibition (E/I) balance involving GABA and glutamate (Glu) is implicated in the pathophysiology of depression. Ketamine, an NMDA receptor antagonist with rapid antidepressant properties, may modulate this balance, yet proton magnetic resonance spectroscopy (¹H-MRS) studies report inconsistent findings regarding the direction, magnitude, and timing of neurochemical effects....
Psychiatry Research Neuroimaging
September 17, 2026
Juliana Lima Constantino, Jesca E. de Jager, Jasper O. Nuninga et al.
Antidepressant treatments, including conventional antidepressants and (es)ketamine, may reverse default mode network (DMN) resting-state functional connectivity (rsFC) alterations related to major depressive disorder (MDD). Despite these agents having distinct initial action mechanisms, both likely share downstream effects that lead to structural and functional adaptations in MDD-related neural...
Journal of Huntington's Disease
September 17, 2026
Carsten Saft, Julia Jessen, David Kiefner et al.
Depression and suicidal ideation are common in Huntington's disease (HD). We report a 60-year-old male with HD who suffered from treatment-resistant depression with intermittent suicidal thoughts for 20 years, irritability and apathy. Despite multiple trials of antidepressants, no sustained improvement was achieved. Under nasal esketamine treatment his mood improved dramatically after three...
Psychiatry Research
September 14, 2026
Kelei Xiao, Yealin Woo, Christine E. Dri et al.
Cognitive impairment is a core feature of major depressive disorder (MDD) and bipolar disorder (BD). Most conventional antidepressants do not have direct and clinically relevant procognitive effects. Ketamine and esketamine are effective in treating treatment-resistant depression (TRD). Herein, this systematic review aims to evaluate the effects of both pharmacotherapeutics on cognitive...
International Journal of Innovative Technologies in Social Science
September 11, 2026
Marta Borkowska, Małgorzata Witaszczyk, Alicja Sołtan et al.
Background: Ketamine and esketamine have been studied as rapid-acting interventions in adults with depressive disorders and suicidal ideation, but findings vary across populations, settings, comparators, routes, and outcome measures. Aim: To examine their effects on suicidal ideation within the first 24 hours and to identify factors contributing to variability across studies. Methods: This...
medRxiv
September 11, 2026
Srdjan Sumarac, Tristan Lawson, Leonardo Favi Bocca et al.
preprint
Ketamine and subcallosal cingulate (SCC) deep brain stimulation (DBS) have each shown antidepressant effects in treatment-resistant depression, yet how ketamine modulates SCC physiology during chronic stimulation remains poorly understood. We analyzed 5,907 hours of bilateral SCC sensing, 485 participant-triggered recordings across 193 days, 47 ketamine dosing episodes, and an in-clinic...
Journal of Psychiatric Research
September 10, 2026
Background: Major depressive and bipolar disorders are leading causes of disability, with many patients developing treatment-resistant depression (TRD/TRBD). Ketamine offers rapid symptom relief, yet recovery extends beyond symptoms. Life engagement (LE) is a key patient-centered outcome encompassing the ability to experience pleasure, function effectively, and participate in meaningful...
Psychiatry International
September 10, 2026
Tommaso Barlattani, Giorgio Sernia, Chiara D’Amelio et al.
Background: Evidence for repeated intranasal esketamine in obsessive–compulsive disorder (OCD) remains preliminary, particularly when OCD co-occurs with treatment-resistant depression (TRD). Methods: We report a 58-year-old woman treated with intranasal esketamine in routine clinical care for TRD; change in obsessive–compulsive symptoms was followed as a secondary observational outcome. Her...
The International Journal of Neuropsychopharmacology
September 9, 2026
Johanna Keeler, Hubertus Himmerich, Janet Treasure et al.
Abstract Background Approximately a third of people with anorexia nervosa (AN) develop a severe and enduring form of the illness, which is often accompanied by depression. This can be a key barrier to recovery. Anti-depressant medications are less effective in treating depression in patients with acute AN, thus new pharmacological treatment options are needed. Ketamine is currently used for...