Trial reportJournal of clinical psychopharmacology2017
Neurophysiological Effects of Bitopertin in Schizophrenia.
Trial report in Journal of clinical psychopharmacology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 2 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
23 citing papers in PubMed, 2 syntheses or guidelines pooled it, 41 citations in OpenAlex.
- Canonical and Non-Canonical Antipsychotics' Dopamine-Related Mechanisms of Present and Next Generation Molecules: A Systematic Review on Translational Highlights for Treatment Response and Treatment-Resistant Schizophrenia.International journal of molecular sciences · 2023Pooled it
- Rational and Translational Implications of D-Amino Acids for Treatment-Resistant Schizophrenia: From Neurobiology to the Clinics.Biomolecules · 2022Pooled it
- Randomized controlled trial of the glycine transporter 1 inhibitor PF-03463275 to enhance cognitive training and neuroplasticity in schizophrenia.Schizophrenia research · 2023Trial
- Quantitative electroencephalography parameters as neurophysiological biomarkers of schizophrenia-related deficits: A Phase II substudy of patients treated with iclepertin (BI 425809).Translational psychiatry · 2022Trial
- Proof of mechanism and target engagement of glutamatergic drugs for the treatment of schizophrenia: RCTs of pomaglumetad and TS-134 on ketamine-induced psychotic symptoms and pharmacoBOLD in healthy volunteers.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2020Trial
- New Pharmacological Treatment Approaches for Schizophrenia: Navigating the Post-iclepertin Landscape.CNS drugs · 2026Review
- Finding the Right Dose: NMDA Receptor-Modulating Treatments for Cognitive and Plasticity Deficits in Schizophrenia and the Role of Pharmacodynamic Target Engagement.Biological psychiatry · 2025Review
- Erythropoietic protoporphyrias: Pathogenesis, diagnosis and management.Liver international : official journal of the International Association for the Study of the Liver · 2025Review
- Mismatch Negativity (MMN) as a Pharmacodynamic/Response Biomarker for NMDA Receptor and Excitatory/Inhibitory Imbalance-Targeted Treatments in Schizophrenia.Advances in neurobiology · 2024Review
- Inhibition of astrocytic glycine transporter-1: friend or foe for ameliorating NMDA receptor hypofunction?Frontiers in cellular neuroscience · 2024Article
- Development of the novel GlyT1 inhibitor, iclepertin (BI 425809), for the treatment of cognitive impairment associated with schizophrenia.European archives of psychiatry and clinical neuroscience · 2023Review
- New Developments in the Treatment of Schizophrenia: An Expert Roundtable.The international journal of neuropsychopharmacology · 2023Article
- Cognitive Deficit in Schizophrenia: From Etiology to Novel Treatments.International journal of molecular sciences · 2021Review
- Histamine HNature communications · 2021Article
- D-Serine: A Cross Species Review of Safety.Frontiers in psychiatry · 2021Review
- Directly and Indirectly Targeting the Glycine Modulatory Site to Modulate NMDA Receptor Function to Address Unmet Medical Needs of Patients With Schizophrenia.Frontiers in psychiatry · 2021Review
- Article
- Evaluation of the Efficacy of BI 425809 Pharmacotherapy in Patients with Schizophrenia Receiving Computerized Cognitive Training: Methodology for a Double-blind, Randomized, Parallel-group Trial.Clinical drug investigation · 2020Article
- Grant Report on d-Serine Augmentation of Neuroplasticity-Based Auditory Learning in SchizophreniaJournal of psychiatry and brain science · 2020Article
- Autoimmune phenotypes in schizophrenia reveal novel treatment targets.Pharmacology & therapeutics · 2018Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 4 institutions in 1 country.
Funding
Abstract
PURPOSE/
backgroundDeficits in N-methyl-D-aspartate receptor (NMDAR) function contribute to symptoms and cognitive dysfunction in schizophrenia and are associated with impaired generation of event-related potential measures including auditory mismatch negativity. Parallel studies of the NMDAR agonist D-serine have suggested that sensitivity of these measures to glutamate-based interventions is related to symptomatic and cognitive response. Bitopertin is a selective inhibitor of glycine transport. This study investigates effects of bitopertin on NMDAR-related event-related potential deficits in schizophrenia. METHODS/PROCEDURES: Patients with schizophrenia/schizoaffective disorder were treated with bitopertin (10 mg, n = 29), in a double-blind, parallel group investigation. Auditory mismatch negativity served as primary outcome measures. Secondary measures included clinical symptoms and neurocognitive performance. FINDINGS/
resultsNo significant changes were seen with bitopertin for neurophysiological, clinical, or neurocognitive assessments. IMPLICATIONS/
conclusionsThese findings represent the first assessment of the effect of bitopertin on neurophysiological biomarkers. Bitopertin did not significantly affect either symptoms or NMDAR-related biomarkers at the dose tested (10 mg). Mismatch negativity showed high test-retest reliability, supporting its use as a target engagement measure.
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.