2023
Effects of a dissociative drug on fronto-limbic resting-state functional connectivity in individuals with posttraumatic stress disorder: a randomized controlled pilot study
Danböck S, Duek O, Ben-Zion Z, Korem N, Amen S, Kelmendi B, Wilhelm F, Levy I, Harpaz-Rotem I. Effects of a dissociative drug on fronto-limbic resting-state functional connectivity in individuals with posttraumatic stress disorder: a randomized controlled pilot study. Psychopharmacology 2023, 241: 243-252. PMID: 37872291, PMCID: PMC10806226, DOI: 10.1007/s00213-023-06479-4.Peer-Reviewed Original ResearchResting-state functional connectivityPosttraumatic stress disorderFunctional magnetic resonance imagingMedial prefrontal cortexMPFC subregionsAnterior medial PFCFunctional connectivityStress disorderAspartate glutamate receptor antagonistPilot studyNon-competitive N-methylGlutamate receptor antagonistsEffects of ketamineDissociative drugsMagnetic resonance imagingIntravenous drug infusionReceptor antagonistSubanesthetic doseDrug infusionCorrelative findingsKetamineResonance imagingTransient decreaseDrug midazolamAmygdalaLong term structural and functional neural changes following a single infusion of Ketamine in PTSD
Duek O, Korem N, Li Y, Kelmendi B, Amen S, Gordon C, Milne M, Krystal J, Levy I, Harpaz-Rotem I. Long term structural and functional neural changes following a single infusion of Ketamine in PTSD. Neuropsychopharmacology 2023, 48: 1648-1658. PMID: 37270621, PMCID: PMC10517133, DOI: 10.1038/s41386-023-01606-3.Peer-Reviewed Original ResearchConceptsKetamine recipientsSingle infusionMain study outcomeTiming of administrationEnd of treatmentNMDA receptor antagonistFunctional neural changesFrequency of administrationSignificant clinical implicationsTrauma-focused psychotherapyBrief exposure therapyAmygdala-vmPFC connectivityPost-retrieval extinctionKetamine doseKetamine administrationReceptor antagonistTrauma scriptsNeural changesClinical implicationsDecreased connectivityExposure therapyKetamineTrauma memoriesStudy outcomesUncinate fasciculus
2017
Synaptic Loss and the Pathophysiology of PTSD: Implications for Ketamine as a Prototype Novel Therapeutic
Krystal JH, Abdallah CG, Averill LA, Kelmendi B, Harpaz-Rotem I, Sanacora G, Southwick SM, Duman RS. Synaptic Loss and the Pathophysiology of PTSD: Implications for Ketamine as a Prototype Novel Therapeutic. Current Psychiatry Reports 2017, 19: 74. PMID: 28844076, PMCID: PMC5904792, DOI: 10.1007/s11920-017-0829-z.Peer-Reviewed Original ResearchConceptsSynaptic connectivityRapid-acting treatmentPathophysiology of PTSDPotential clinical importanceTreatment of PTSDSynaptic lossPurpose of ReviewStudiesDisconnection syndromeClinical importanceNovel pharmacotherapeuticsNovel therapeuticsPTSD symptomsRecent FindingsHerePTSDPathophysiologyKetamineTreatmentDisordersTherapeutic applicationsStress-related lossesSyndromeSymptomsPharmacotherapeutics