ArticleSchizophrenia research2015
Molecular evidence for decreased synaptic efficacy in the postmortem olfactory bulb of individuals with schizophrenia.
Article in Schizophrenia research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.
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Who cites it
13 citing papers in PubMed, 1 synthesis or guideline pooled it, 19 citations in OpenAlex.
- Synapse Pathology in Schizophrenia: A Meta-analysis of Postsynaptic Elements in Postmortem Brain Studies.Schizophrenia bulletin · 2020Pooled it
- Neuroglia Alterations in the Olfactory Bulbs in Patients with Schizophrenia: An Exploratory Postmortem Study.Life (Basel, Switzerland) · 2026Article
- Inulin ameliorates chronic ketamine-induced anxiety-like behaviors and impairments in spatial learning and memory: involvement of gut microbiota, microbial metabolite short-chain fatty acids, and the BDNF-TrkB-ERK1/2-CREB pathway.Frontiers in microbiology · 2026Article
- Specific neuroblast-derived signals control both cell migration and fate in the rostral migratory stream.bioRxiv : the preprint server for biology · 2025Article
- Chronic exposure to MK-801 leads to olfactory deficits and reduced neurogenesis in the olfactory bulbs of adult male mice.Frontiers in behavioral neuroscience · 2024Article
- Review
- Transcriptional profile of pyramidal neurons in chronic schizophrenia reveals lamina-specific dysfunction of neuronal immunity.Molecular psychiatry · 2021Article
- Disrupted Olfactory Integration in Schizophrenia: Functional Connectivity Study.The international journal of neuropsychopharmacology · 2017Article
- Postsynaptic Density-95 Isoform Abnormalities in Schizophrenia.Schizophrenia bulletin · 2017Article
- Treating the Synapse in Major Psychiatric Disorders: The Role of Postsynaptic Density Network in Dopamine-Glutamate Interplay and Psychopharmacologic Drugs Molecular Actions.International journal of molecular sciences · 2017Review
- Emerging Synaptic Molecules as Candidates in the Etiology of Neurological Disorders.Neural plasticity · 2017Review
- SNARE complex in developmental psychiatry: neurotransmitter exocytosis and beyond.Journal of neural transmission (Vienna, Austria : 1996) · 2016Review
- Dysregulations of Synaptic Vesicle Trafficking in Schizophrenia.Current psychiatry reports · 2016Review
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
Multiple lines of evidence suggest altered synaptic plasticity/connectivity as a pathophysiologic mechanism for various symptom domains of schizophrenia. Olfactory dysfunction, an endophenotype of schizophrenia, reflects altered activity of the olfactory circuitry, which conveys signals from olfactory receptor neurons to the olfactory cortex via synaptic connections in the glomeruli of the olfactory bulb. The olfactory system begins with intranasal olfactory receptor neuron axons synapsing with mitral and tufted cells in the glomeruli of the olfactory bulb, which then convey signals directly to the olfactory cortex. We hypothesized that olfactory dysfunction in schizophrenia is associated with dysregulation of synaptic efficacy in the glomeruli of the olfactory bulb. To test this, we employed semi-quantitative immunohistochemistry to examine the olfactory bulbs of 13 postmortem samples from schizophrenia and their matched control pairs for glomerular expression of 5 pre- and postsynaptic proteins that are involved in the integrity and function of synapses. In the glomeruli of schizophrenia cases compared to their matched controls, we found significant decreases in three presynaptic proteins which play crucial roles in vesicular glutamate transport - synapsin IIa (-18.05%, p=0.019), synaptophysin (-24.08% p=0.0016) and SNAP-25 (-23.9%, p=0.046). Two postsynaptic proteins important for spine formation and glutamatergic signaling were also decreased-spinophilin (-17.40%, p=0.042) and PSD-95 (-34.06%, p=0.015). These findings provide molecular evidence for decreased efficacy of synapses within the olfactory bulb, which may represent a synaptic mechanism underlying olfactory dysfunction in schizophrenia.
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Registered trials
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