Trial reportBiochimica et biophysica acta. Proteins and proteomics2018
d-Serine is a potential biomarker for clinical response in treatment of post-traumatic stress disorder using (R,S)-ketamine infusion and TIMBER psychotherapy: A pilot study.
Trial report in Biochimica et biophysica acta. Proteins and proteomics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04771767 (Assessing a Combined Ketamine and Online Cognitive Behavioural Therapy Intervention for Treatment Resistant Post-Traumatic Stress Disorder), which is not on this map. Cited by 32 papers, 9 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Assessing a Combined Ketamine and Online Cognitive Behavioural Therapy Intervention for Treatment Resistant Post-Traumatic Stress Disorder
Who cites it
32 citing papers in PubMed, 9 syntheses or guidelines pooled it, 64 citations in OpenAlex.
- Ketamine-Assisted Psychotherapy for Posttraumatic Stress Disorder: A Systematic Review and Individual Participant Data Meta-Analysis of Predictors of Treatment Effects.Psychotherapy and psychosomatics · 2026Pooled it
- Effects of Intravenous Ketamine on Posttraumatic Stress Disorder (PTSD): A Systematic Review.Acta psychiatrica Scandinavica · 2026Pooled it
- Molecular pathways of ketamine: A systematic review of immediate and sustained effects on PTSD.Psychopharmacology · 2025Pooled it
- Effects of ketamine on fear memory extinction: a review of preclinical literature.Frontiers in neuroscience · 2025Pooled it
- So how special is special K? A systematic review and meta-analysis of ketamine for PTSD RCTs.European journal of psychotraumatology · 2024Pooled it
- A transdiagnostic systematic review and meta-analysis of ketamine's anxiolytic effects.Journal of psychopharmacology (Oxford, England) · 2023Pooled it
- Evidence for the beneficial effect of ketamine in the treatment of patients with post-traumatic stress disorder: A systematic review and meta-analysis.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2022Pooled it
- The Multivariate Effect of Ketamine on PTSD: Systematic Review and Meta-Analysis.Frontiers in psychiatry · 2022Pooled it
- Psychedelic-Assisted Psychotherapy-A Systematic Review of Associated Psychological Interventions.Frontiers in psychology · 2022Pooled it
- Do Contemplative Practices Promote Trauma Recovery? A Narrative Review from 2018 to 2023.Healthcare (Basel, Switzerland) · 2025Review
- Ketamine for treatment-resistant post-traumatic stress disorder: double-blind active-controlled randomised crossover study.BJPsych open · 2025Article
- d-amino acids: new functional insights.The FEBS journal · 2025Review
- Psychedelic Drugs in Mental Disorders: Current Clinical Scope and Deep Learning-Based Advanced Perspectives.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Review
- Novel psychedelic interventions for post-traumatic stress disorder and their promise for precision medicine.Therapeutic advances in psychopharmacology · 2025Review
- Combined Effects of Nasal Ketamine and Trauma-Focused Psychotherapy in Treatment-Resistant Post-Traumatic Stress Disorder: A Pilot Case Series.Behavioral sciences (Basel, Switzerland) · 2024Article
- Review
- Effectiveness of Ketamine for the Treatment of Post-Traumatic Stress Disorder - A Systematic Review and Meta-Analysis.Clinical neuropsychiatry · 2024Review
- Post-traumatic stress disorder: the role of the amygdala and potential therapeutic interventions - a review.Frontiers in psychiatry · 2024Review
- Ketamine for Treatment of Posttraumatic Stress Disorder: State of the Field.Focus (American Psychiatric Publishing) · 2023Review
- Ketamine and psychotherapy for the treatment of psychiatric disorders: systematic review.BJPsych open · 2023Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 3 institutions in 1 country.
Funding
Abstract
Post-traumatic stress disorder (PTSD) is a chronic and debilitating condition that is often refractory to standard frontline antidepressant therapy. A promising new approach to PTSD therapy is administration of a single sub-anesthetic dose of (R,S)-ketamine (Ket). The treatment produces rapid and significant therapeutic response, which lasts for only 4-7 days. In one of our studies, the mean duration of response was increased to 33 days when Ket administration was combined with a mindfulness-based cognitive therapy, Trauma Interventions using Mindfulness Based Extinction and Reconsolidation (TIMBER). We now report the results from a 20-patient study, which examined the duration of sustained response with combined TIMBER-Ket therapy, TIMBER-K arm, relative to the response observed in a placebo-controlled arm, TIMBER-P. A significant difference in the duration of response was observed between TIMBER-K and TIMBER-P arms: 34.44 ± 19.12 days and 16.50 ± 11.39 days, respectively (p = 0.022). Previous studies identified a negative correlation between antidepressant response to Ket and basal plasma concentrations of d-serine (DSR). In this study, the basal DSR levels positively correlated with the pre-treatment severity of PTSD symptoms (Pearson's r = 0.42, p = 0.07) and patients with basal DSR level ≥ 3.5 μM displayed not only higher PTSD severity but also shorter duration of response. The data indicate that basal DSR levels may serve as a biomarker of the severity of PTSD symptoms and as a predictor of clinical response. This article is part of a Special Issue entitled: d-Amino acids: biology in the mirror, edited by Dr. Loredano Pollegioni, Dr. Jean-Pierre Mothet and Dr. Molla Gianluca.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.