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Neuropsychopharmacology

67 Papers Indexed in Blossom

Published Papers

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Psychedelics produce enduring behavioral effects and functional plasticity through mechanisms independent of structural plasticity

This preclinical rat study (n=24; 8 rats per group) shows that a single dose of psilocybin (1.0 mg/kg) or the selective 5-HT2A receptor agonist 25CN-NBOH (1.5 mg/kg) reduces immobility in the forced-swim test, with effects persisting for at least three months. Electrophysiology of medial prefrontal cortex (mPFC) Layer 5 neurons reveals long-lasting functional, but not structural, plasticity—characterised by changes in resting membrane potential, neuronal firing rates, and excitatory synaptic input. In contrast, dendritic spine density and gene-expression markers related to synaptic structure remain unchanged, indicating enduring functional alterations rather than persistent structural modifications.

Published
Journal
Neuropsychopharmacology
Authors
Kramer, H. M., Hibicke, M., Middleton, J., Jaster, A. M., Kristensen, J. L., Nichols, C. D.
Open Accessindividual

Microdosing psychedelics and its effect on creativity: Lessons learned from three double-blind placebo controlled longitudinal trials

This combined analysis (n=175) of three double-blind placebo-controlled longitudinal experiments investigated the effects of microdosing psilocybin (0.74 -; 1.71mg) on creativity and found that it increased the originality of their ideas while generating novel applications for ordinary things (divergent thinking). However, it did not increase the number of novel ideas, or their ability to detect features that are common across multiple things (convergent thinking).

Published
Journal
Neuropsychopharmacology
Authors
Prochazkova, L., van Elk, M., Marschall, J., Rifkin, B. D., Fiacchino, D., Fejer, G., Hommel, B., Schoen, N.
Open Accessindividual

Acute effects of MDMA, MDA, lysine-MDMA, and lysine-MDA in a randomized, double-blind, placebo-controlled, crossover trial in healthy participants

In a randomized, double-blind, placebo-controlled crossover in 23 healthy volunteers, MDA produced longer‑lasting, stronger and more psychedelic‑like subjective and autonomic effects and more adverse reactions than equimolar MDMA. Lys‑MDA acted as a functional slow‑release prodrug that delayed onset and peak effects, whereas Lys‑MDMA did not release MDMA and produced no measurable effects, showing lysine conjugation can alter timing but not necessarily improve tolerability.

Published
Journal
Neuropsychopharmacology
Authors
Straumann, I., Vizeli, P., Avedisian, I., Erne, L., Noorshams, D., Vukalovic, I., Eckert, A., Luethi, D., Rudin, D., Liechti, M. E.
Open Accessindividual

N,N-dimethyltryptamine effects on connectome harmonics, subjective experience and comparative psychedelic experiences

This neuroscience secondary (n=25) of two earlier studies used connectome harmonic decomposition to analyse how DMT affects brain function across the structural connectome (white matter pathways), finding that DMT reshapes the connectome harmonic repertoire and increases repertoire entropy similarly to other psychedelics (psilocybin, LSD, ketamine), and importantly demonstrating for the first time that energy spectrum differences and repertoire entropy measures correlate with subjective experience intensity in a time-resolved manner, revealing close coupling between connectome harmonics and conscious experience under psychedelics.

Published
Journal
Neuropsychopharmacology
Authors
Vohryzek, J., Luppi, A. I., Atasoy, S., Deco, G., Carhart-Harris, R. L., Timmermann, C., Kringelbach, M. L.
Paywallindividual

Safety and tolerability of multiple sublingual microdoses of 5-MeO-DMT in adults with moderate symptoms of depression and/or anxiety: a randomized, double-blind, placebo-controlled study

This Phase I clinical trial (n=36) of sublingual 5-MeO-DMT (6-12 mg weekly doses over four weeks) in adults with moderate to high anxiety/depression demonstrated good safety and tolerability with no significant adverse events, rapid absorption with peak plasma concentrations at 20 minutes, dose-dependent neurophysiological modulation without full psychedelic effects, and maintenance of normal cognitive and behavioral function.

Published
Journal
Neuropsychopharmacology
Authors
Beatriz, M., Millón, B., Noguera, L., Bruno, D., Vita, L., Zanino, M., Kassuha, D. E., Ortiz, J. E., Feresin, G. E., Díaz-Dellavalle, P., Orosco, L., Garcés, M. A., Diez, P., Albarracín, S. G., Bruno, M. A.
Paywallindividual

Rapid and sustained antidepressant effects of vaporized N,N-dimethyltryptamine: a phase 2a clinical trial in treatment-resistant depression

This open-label fixed-order dose-escalation trial (n=14) evaluated inhaled DMT (15mg & 60mg) for treatment-resistant depression (TRD) for the first time. Results showed rapid and sustained antidepressant effects with a 21-point reduction on the Montgomery-Asberg Depression Rating Scale by day 7 (p<0.001), an 86% response rate, and a 57% remission rate lasting up to 3 months, with significant decreases in suicidal ideation (SI).

Published
Journal
Neuropsychopharmacology
Authors
Falchi-Carvalho, M., Palhano-Fontes, F., Wießner, I., Barros, H., Bolcont, R., Laborde, S., Silva, S. R. B., Montanini, D., Barbosa, D. C., Teixeira, E., Florence-Vilela, R., Almeida, R., Macedo, R. K. A., Arichelle, F., Pantrigo, E. J., Costa-Macedo, J. V., da Cruz Nunes, J. A., Araújo, D. B., de Araujo Costa Neto, L. A., Nunes Ferreira, L. F., Dantas Correa, L., da Costa Bezerra, R. B., Arcoverde, E., Galvão-Coelho, N. L.

Quick Facts

Papers Indexed
67
h-Index
258
Open Access
No
Publisher
Nature Portfolio
Country
Switzerland
Website
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