Dimitrios Andreou, Nils Eiel Steen, Kjetil Nordbø Jørgensen, Thor Ueland, Laura A Wortinger, Lynn Mørch-Johnsen, Ina Drabløs, Tereza Calkova, Robert H Yolken, Ole A Andreassen, Ingrid Agartz
{"title":"Increased Herpes simplex virus 1, Toxoplasma gondii and Cytomegalovirus antibody concentrations in severe mental illness.","authors":"Dimitrios Andreou, Nils Eiel Steen, Kjetil Nordbø Jørgensen, Thor Ueland, Laura A Wortinger, Lynn Mørch-Johnsen, Ina Drabløs, Tereza Calkova, Robert H Yolken, Ole A Andreassen, Ingrid Agartz","doi":"10.1038/s41398-024-03198-y","DOIUrl":"10.1038/s41398-024-03198-y","url":null,"abstract":"<p><p>Infections with Cytomegalovirus (CMV), Herpes simplex virus 1 (HSV1) and Toxoplasma gondii (TG) have been implicated in severe mental illness. All three pathogens have high seroprevalence in the human population, are neurotropic and establish a persistent infection. We hypothesized that exposed (seropositive) patients with severe mental illness would show higher immunoglobulin G (IgG) concentrations than exposed healthy controls (HC). We included 765 patients with severe mental illness (schizophrenia n = 515, bipolar disorder n = 250) and 541 HC. CMV, HSV1 and TG IgG seropositivity and concentrations were measured with immunoassays (seropositivity: CMV, n = 447 patients vs. 296 HC; HSV1, n = 355 vs. 238; and TG, n = 159 vs. 126). Among seropositive participants, patients had higher HSV1 (p < 0.001) and TG (p = 0.003) IgG concentrations than HC. Stratifying by diagnosis, both schizophrenia (p = 0.001) and bipolar disorder (p = 0.001) had higher HSV1 IgG concentrations, while schizophrenia only had higher TG (p = 0.009) and CMV (p = 0.045) IgG concentrations than HC. In SZ, higher HSV1 IgG concentrations were associated with higher psychotic (p = 0.030) and manic (p = 0.008) symptom scores, but only among CMV- or TG-infected patients which suggests synergistic effects. Among all participants, HSV1 IgG concentrations were inversely associated with interleukin-18 (p < 0.001) and positively associated with high-sensitivity C-reactive protein (p = 0.002) and B cell-activating factor (p = 0.004), possibly indicating T cell exhaustion, enhanced inflammation, and increased B-cell response, respectively. Patients with severe mental illness exhibit a heightened immune system response to HSV1, TG, and CMV infections suggesting immune system dysfunction and/or a more severe infection. For HSV1, higher IgG concentrations were linked to a greater clinical burden.</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"498"},"PeriodicalIF":5.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11655861/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142855553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chaoyue Ding, Yuqing Sun, Kunchi Li, Sangma Xie, Hao Yan, Peng Li, Jun Yan, Jun Chen, Huiling Wang, Huaning Wang, Yunchun Chen, Yongfeng Yang, Luxian Lv, Hongxing Zhang, Lin Lu, Dai Zhang, Yaojing Chen, Zhanjun Zhang, Tianzi Jiang, Bing Liu
{"title":"Disorder-specific neurodynamic features in schizophrenia inferred by neurodynamic embedded contrastive variational autoencoder model.","authors":"Chaoyue Ding, Yuqing Sun, Kunchi Li, Sangma Xie, Hao Yan, Peng Li, Jun Yan, Jun Chen, Huiling Wang, Huaning Wang, Yunchun Chen, Yongfeng Yang, Luxian Lv, Hongxing Zhang, Lin Lu, Dai Zhang, Yaojing Chen, Zhanjun Zhang, Tianzi Jiang, Bing Liu","doi":"10.1038/s41398-024-03200-7","DOIUrl":"10.1038/s41398-024-03200-7","url":null,"abstract":"<p><p>Neurodynamic models that simulate how micro-level alterations propagate upward to impact macroscopic neural circuits and overall brain function may offer valuable insights into the pathological mechanisms of schizophrenia (SCZ). In this study, we integrated a neurodynamic model with the classical Contrastive Variational Autoencoder (CVAE) to extract and evaluate macro-scale SCZ-specific features, including subject-level, region-level parameters, and time-varying states. Firstly, we demonstrated the robust fitting of the model within our multi-site dataset. Subsequently, by employing representational similarity analysis and a deep learning classifier, we confirmed the specificity and disorder-related information capturing ability of SCZ-specific features. Moreover, analysis of the attractor characteristics of the neurodynamic system revealed significant differences in attractor space patterns between SCZ-specific states and shared states. Finally, we utilized Partial Least Squares (PLS) regression to examine the multivariate mapping relationship between SCZ-specific features and symptoms, identifying two sets of correlated modes implicating unique molecular mechanisms: one mode corresponding to negative and general symptoms, and another mode corresponding to positive symptoms. Our results provide valuable insights into disorder-specific neurodynamic features and states associated with SCZ, laying the foundation for understanding the intricate pathophysiology of this disorder.</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"496"},"PeriodicalIF":5.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11655856/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142855489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dominique Recher, Judith Rohde, Giulia Da Poian, Mirka Henninger, Luzius Brogli, Reto Huber, Walter Karlen, Caroline Lustenberger, Birgit Kleim
{"title":"Targeted memory reactivation during sleep improves emotional memory modulation following imagery rescripting.","authors":"Dominique Recher, Judith Rohde, Giulia Da Poian, Mirka Henninger, Luzius Brogli, Reto Huber, Walter Karlen, Caroline Lustenberger, Birgit Kleim","doi":"10.1038/s41398-024-03192-4","DOIUrl":"10.1038/s41398-024-03192-4","url":null,"abstract":"<p><p>Targeted Memory Reactivation (TMR) during sleep benefits memory integration and consolidation. In this pre-registered study, we investigated the effects of TMR applied during non-rapid eye movement (NREM) sleep following modulation and updating of aversive autobiographical memories using imagery rescripting (ImR). During 2-5 nights postImR, 80 healthy participants were repeatedly presented with either idiosyncratic words from an ImR updated memory during sleep (experimental group) or with no or neutral words (control groups) using a wearable EEG device (Mobile Health Systems Lab-Sleepband, MHSL-SB) [1] implementing a close-loop cueing procedure. Multivariate analysis were conducted to assess change score trajectories in five key emotional memory characteristics (positive and negative valence, emotional distress, arousal, and vividness) across assessments (timepoints, t) and between the study groups (TMR condition). While ImR showed significant effects on all memory characteristics (d = 0.76-1.66), there were significant additional improvements in the experimental group. Memories were significantly less vivid and afflicted with less emotional distress and arousal following ImR-words cueing. TMR during sleep in individuals' homes was feasible and further improved some ImR's adaptive memory effects. If replicated in clinical samples, TMR may be utilized to augment the effects of ImR and other clinical memory modulation procedures and create personalized treatment options. Such advances in emotional memory treatments are direly needed, as aversive memories are a salient feature across mental disorders, such as post-traumatic stress disorder (PTSD).</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"490"},"PeriodicalIF":5.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11655627/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142855570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bettina Habelt, Dzmitry Afanasenkau, Cindy Schwarz, Kevin Domanegg, Martin Kuchar, Carsten Werner, Ivan R Minev, Rainer Spanagel, Marcus W Meinhardt, Nadine Bernhardt
{"title":"Prefrontal electrophysiological biomarkers and mechanism-based drug effects in a rat model of alcohol addiction.","authors":"Bettina Habelt, Dzmitry Afanasenkau, Cindy Schwarz, Kevin Domanegg, Martin Kuchar, Carsten Werner, Ivan R Minev, Rainer Spanagel, Marcus W Meinhardt, Nadine Bernhardt","doi":"10.1038/s41398-024-03189-z","DOIUrl":"10.1038/s41398-024-03189-z","url":null,"abstract":"<p><p>Patients with alcohol use disorder (AUD) who seek treatment show highly variable outcomes. A precision medicine approach with biomarkers responsive to new treatments is warranted to overcome this limitation. Promising biomarkers relate to prefrontal control mechanisms that are severely disturbed in AUD. This results in reduced inhibitory control of compulsive behavior and, eventually, relapse. We reasoned here that prefrontal dysfunction, which underlies vulnerability to relapse, is evidenced by altered neuroelectric signatures and should be restored by pharmacological interventions that specifically target prefrontal dysfunction. To test this, we applied our recently developed biocompatible neuroprosthesis to measure prefrontal neural function in a well-established rat model of alcohol addiction and relapse. We monitored neural oscillations and event-related potentials in awake alcohol-dependent rats during abstinence and following treatment with psilocybin or LY379268, agonists of the serotonin 2A receptor (5-HT<sub>2A</sub>R), and the metabotropic glutamate receptor 2 (mGluR2), that are known to reduce prefrontal dysfunction and relapse. Electrophysiological impairments in alcohol-dependent rats are reduced amplitudes of P1N1 and N1P2 components and attenuated event-related oscillatory activity. Psilocybin and LY379268 were able to restore these impairments. Furthermore, alcohol-dependent animals displayed a dominance in higher beta frequencies indicative of a state of hyperarousal that is prone to relapse, which particularly psilocybin was able to counteract. In summary, we provide prefrontal markers indicative of relapse and treatment response, especially for psychedelic drugs.</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"486"},"PeriodicalIF":5.8,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11621398/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142787102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Susan G Dorsey, Evelina Mocci, Malcolm V Lane, Bruce K Krueger
{"title":"Rapid effects of valproic acid on the fetal brain transcriptome: implications for brain development and autism.","authors":"Susan G Dorsey, Evelina Mocci, Malcolm V Lane, Bruce K Krueger","doi":"10.1038/s41398-024-03179-1","DOIUrl":"10.1038/s41398-024-03179-1","url":null,"abstract":"<p><p>There is an increased incidence of autism among the children of women who take the anti-epileptic, mood-stabilizing drug, valproic acid (VPA) during pregnancy; moreover, exposure to VPA in utero causes autistic-like symptoms in rodents and non-human primates. Analysis of RNA-seq data obtained from E12.5 fetal mouse brains 3 hours after VPA administration to the pregnant dam revealed that VPA rapidly and significantly increased or decreased the expression of approximately 7,300 genes. No significant sex differences in VPA-induced gene expression were observed. Expression of 399 autism risk genes was significantly altered by VPA as was expression of 258 genes that have been reported to modulate fetal brain development but are not otherwise linked to autism. Expression of genes associated with intracellular signaling pathways, neurogenesis, and excitation-inhibition balance as well as synaptogenesis, neuronal fate determination, axon and dendritic development, neuroinflammation, circadian rhythms, and epigenetic modulation of gene expression was dysregulated by VPA. Notably, at least 40 genes that are known to regulate embryonic neurogenesis were dysregulated by VPA. The goal of this study was to identify mouse genes that are: (a) significantly up- or downregulated by VPA in the fetal brain and (b) associated with autism and/or known to play a role in embryonic neurodevelopmental processes, perturbation of which has the potential to alter brain connectivity and, consequently behavior, in the adult. The genes meeting these criteria provide potential targets for future hypothesis-driven studies to elucidate the proximal causes of errors in brain connectivity underlying neurodevelopmental disorders such as autism.</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"482"},"PeriodicalIF":5.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11618798/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142781130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Emily M Parker, Nathan L Kindja, Rebecca A DeGiosio, Ryan B Salisbury, Josh M Krivinko, Claire E J Cheetham, Matthew L MacDonald, Weijia Fan, Bin Cheng, Robert A Sweet
{"title":"Impacts of CACNB4 overexpression on dendritic spine density in both sexes and relevance to schizophrenia.","authors":"Emily M Parker, Nathan L Kindja, Rebecca A DeGiosio, Ryan B Salisbury, Josh M Krivinko, Claire E J Cheetham, Matthew L MacDonald, Weijia Fan, Bin Cheng, Robert A Sweet","doi":"10.1038/s41398-024-03181-7","DOIUrl":"10.1038/s41398-024-03181-7","url":null,"abstract":"<p><p>The voltage-gated calcium channel (VGCC) subunit complex is comprised of the α1 subunit, the ion-permeable channel, and three auxiliary subunits: β, α<sub>2</sub>δ, and γ. β is the most extensively studied auxiliary subunit and is necessary for forward trafficking of the α1 subunit to the plasma membrane. VGCCs mediate voltage-dependent movement of calcium ions into neuronal cytoplasm, including at dendrites, where intracellular calcium spikes initiate signaling cascades that shape the structural plasticity of dendritic spines. Genetic studies strongly implicate calcium signaling dysfunction in the etiology of neurodevelopmental disorders including schizophrenia. Dendritic spine density is significantly decreased in schizophrenia in the primary auditory cortex where it is driven by the loss of small spines, and small spine loss associated with increased peptide levels of ALFDFLK found in the VGCC β subunit β4. Overexpressing the gene that encodes the voltage-gated calcium channel subunit β4, CACNB4, selectively reduced small spine density in vitro. In the current study we extended this observation in an intact mammalian system within a relevant neurodevelopmental context. We overexpressed CACNB4 in early development, assessed spine density and morphology in adult male and female mouse cortex, and characterized β1-4 protein levels and β4 protein-protein interactions. Overexpression reduced small spine density in females. This effect was not dependent on the estrous stage. Instead, it corresponded to sex differences in the murine β4 interactome. The VGCC subunit β1b was significantly enriched in the β4 interactome of male relative to female mice, and thus may have served to mitigate VGCC overexpression-mediated spine loss in male mice.</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"484"},"PeriodicalIF":5.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11618769/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142781127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kenneth Shinozuka, Katarina Jerotic, Pedro Mediano, Alex T Zhao, Katrin H Preller, Robin Carhart-Harris, Morten L Kringelbach
{"title":"Synergistic, multi-level understanding of psychedelics: three systematic reviews and meta-analyses of their pharmacology, neuroimaging and phenomenology.","authors":"Kenneth Shinozuka, Katarina Jerotic, Pedro Mediano, Alex T Zhao, Katrin H Preller, Robin Carhart-Harris, Morten L Kringelbach","doi":"10.1038/s41398-024-03187-1","DOIUrl":"10.1038/s41398-024-03187-1","url":null,"abstract":"<p><p>Serotonergic psychedelics induce altered states of consciousness and have shown potential for treating a variety of neuropsychiatric disorders, including depression and addiction. Yet their modes of action are not fully understood. Here, we provide a novel, synergistic understanding of psychedelics arising from systematic reviews and meta-analyses of three hierarchical levels of analysis: (1) subjective experience (phenomenology), (2) neuroimaging and (3) molecular pharmacology. Phenomenologically, medium and high doses of LSD yield significantly higher ratings of visionary restructuralisation than psilocybin on the 5-dimensional Altered States of Consciousness Scale. Our neuroimaging results reveal that, in general, psychedelics significantly strengthen between-network functional connectivity (FC) while significantly diminishing within-network FC. Pharmacologically, LSD induces significantly more inositol phosphate formation at the 5-HT<sub>2A</sub> receptor than DMT and psilocin, yet there are no significant between-drug differences in the selectivity of psychedelics for the 5-HT<sub>2A</sub>, 5-HT<sub>2C</sub>, or D<sub>2</sub> receptors, relative to the 5-HT<sub>1A</sub> receptor. Our meta-analyses link DMT, LSD, and psilocybin to specific neural fingerprints at each level of analysis. The results show a highly non-linear relationship between these fingerprints. Overall, our analysis highlighted the high heterogeneity and risk of bias in the literature. This suggests an urgent need for standardising experimental procedures and analysis techniques, as well as for more research on the emergence between different levels of psychedelic effects.</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"485"},"PeriodicalIF":5.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11618481/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142781141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marvin S Meiering, David Weigner, Matti Gärtner, Luisa Carstens, Christian Keicher, Rita Hertrampf, Christian F Beckmann, Maarten Mennes, Andreas Wunder, Anne Weigand, Simone Grimm
{"title":"Correction: Functional activity and connectivity signatures of ketamine and lamotrigine during negative emotional processing: a double-blind randomized controlled fMRI study.","authors":"Marvin S Meiering, David Weigner, Matti Gärtner, Luisa Carstens, Christian Keicher, Rita Hertrampf, Christian F Beckmann, Maarten Mennes, Andreas Wunder, Anne Weigand, Simone Grimm","doi":"10.1038/s41398-024-03191-5","DOIUrl":"10.1038/s41398-024-03191-5","url":null,"abstract":"","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"483"},"PeriodicalIF":5.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11618780/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142781123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gustavo C Medeiros, Isabella Demo, Fernando S Goes, Carlos A Zarate, Todd D Gould
{"title":"Personalized use of ketamine and esketamine for treatment-resistant depression.","authors":"Gustavo C Medeiros, Isabella Demo, Fernando S Goes, Carlos A Zarate, Todd D Gould","doi":"10.1038/s41398-024-03180-8","DOIUrl":"10.1038/s41398-024-03180-8","url":null,"abstract":"<p><p>A large and disproportionate portion of the burden associated with major depressive disorder (MDD) is due to treatment-resistant depression (TRD). Intravenous (R,S)-ketamine (ketamine) and intranasal (S)-ketamine (esketamine) are rapid-acting antidepressants that can effectively treat TRD. However, there is variability in response to ketamine/esketamine, and a personalized approach to their use will increase success rates in the treatment of TRD. There is a growing literature on the precision use of ketamine in TRD, and the body of evidence on esketamine is still relatively small. The identification of reliable predictors of response to ketamine/esketamine that are easily translatable to clinical practice is urgently needed. Potential clinical predictors of a robust response to ketamine include a pre-treatment positive family history of alcohol use disorder and a pre-treatment positive history of clinically significant childhood trauma. Pre-treatment versus post-treatment increases in gamma power in frontoparietal brain regions, observed in electroencephalogram (EEG) studies, is a promising brain-based biomarker of response to ketamine, given its time of onset and general applicability. Blood-based biomarkers have shown limited usefulness, with small-effect increases in brain-derived neurotrophic factor (BDNF) being the most consistent indicator of ketamine response. The severity of treatment-emergent dissociative symptoms is typically not associated with a response either to ketamine or esketamine. Future studies should ensure that biomarkers and clinical variables are obtained in a similar manner across studies to allow appropriate comparison across trials and to reduce the signal-to-noise ratio. Most predictors of response to ketamine/esketamine have modest effect sizes; therefore, the use of multivariate predictive models will be needed.</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"481"},"PeriodicalIF":5.8,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11607365/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142755701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amber J Zimmerman, Jason P Weick, Grigorios Papageorgiou, Nikolaos Mellios, Jonathan L Brigman
{"title":"Aberrant encoding of event saliency in the orbitofrontal cortex following loss of the psychiatric-associated circular RNA, circHomer1.","authors":"Amber J Zimmerman, Jason P Weick, Grigorios Papageorgiou, Nikolaos Mellios, Jonathan L Brigman","doi":"10.1038/s41398-024-03188-0","DOIUrl":"10.1038/s41398-024-03188-0","url":null,"abstract":"<p><p>CircHomer1 is an activity-dependent circular RNA (circRNA) isoform produced from back-splicing of the Homer1 transcript. Homer1 isoforms are well-known regulators of homeostatic synaptic plasticity through post-synaptic density scaffold regulation. Homer1 polymorphisms have been associated with psychiatric diseases including schizophrenia (SCZ) and bipolar disorder (BD). Postmortem tissue from patients with SCZ and BD displayed reduced circHomer1 levels within the orbitofrontal cortex (OFC), a region that tracks event saliency important for modulating behavioral flexibility. While dysregulation of circHomer1 expression has recently been identified across multiple psychiatric and neurodegenerative disorders and is associated with impaired behavioral flexibility in mice, it is unknown whether circHomer1 can induce electrophysiological signatures relevant to cognitive dysfunction in these disorders. To examine the role of circHomer1 in neuronal signaling, we bilaterally knocked down circHomer1 in the OFC of C57BL/6 J male mice and recorded neural activity from the OFC during a touchscreen reversal learning task then measured molecular changes of synaptic regulators following knockdown. Knockdown of circHomer1 within the OFC induced choice-dependent changes in multiunit firing rate and local field potential coordination and power to salient stimuli during reversal learning. Further, these electrophysiological changes were associated with transcriptional downregulation of glutamatergic signaling effectors and behavioral alterations leading to impaired cognitive flexibility. CircHomer1 is a stable biomolecule, whose knockdown in rodent OFC produces lasting electrophysiological and transcriptional changes important for efficient reversal learning. This is, to our knowledge, the first demonstration of a psychiatric-associated circRNA contributing to electrophysiological, transcriptional, and behavioral alterations relevant to psychiatric phenotypes.</p>","PeriodicalId":23278,"journal":{"name":"Translational Psychiatry","volume":"14 1","pages":"480"},"PeriodicalIF":5.8,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11604931/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142751797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}