Research Square
October 5, 2026
Anette Kjellgren, Johan Lundberg, Hampus Yngwe et al.
preprint
Abstract Psilocybin treatment has emerged as a promising intervention for Major Depressive Disorder (MDD). However, the contribution of psychotherapeutic support to treatment outcomes remains unclear. This study explored therapists' descriptions of their work during a randomized, double-blind, placebo-controlled psilocybin treatment phase II trial for MDD. Nine therapists participated in...
Molecular Psychiatry
July 8, 2026
Granville J. Matheson, Johan Lundberg, Martin Gärde et al.
The serotonin 1B receptor can be studied in vivo with PET using [^11C]AZ10419369, and has been linked to both the pathophysiology and treatment of major depressive disorder (MDD). Ketamine and electroconvulsive therapy (ECT) both exert rapid and potent antidepressive effects, and although these treatments may not act directly on the serotonin system, they both cause dose-dependent increases in...
Neuropsychopharmacology
July 7, 2026
Wojciech Pasławski, Daniel Doyon, Carl Johan Ekman et al.
Psilocybin is a rapid-acting antidepressant, but its mechanism of action in major depressive disorder remains unclear. In this secondary analysis of randomized, placebo-controlled trial with multimodal CSF and blood biomarker measurements, psilocybin selectively reduced CSF galanin and noradrenaline, implicating that normalization of these co-transmitters is a key pharmacodynamic signature.
JAMA Network Open
May 15, 2026
Hampus Yngwe, Pontus Plavén-sigray, Carl Johan Ekman et al.
1 citation
Importance: Psilocybin has been proposed as a rapid-acting antidepressant (onset 6 weeks), but evidence from randomized clinical trials remains limited, particularly in the broader major depressive disorder (MDD) population. Objective: To assess short-term and long-term antidepressant effects of psilocybin therapy in patients with MDD. Design, Setting, and Participants: This double-blind,...