Chronic LSD alters gene expression profiles in the mPFC relevant to schizophrenia [RNA-seq]
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ABSTRACT:
PROVIDER: PRJNA743513 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR15034348.fastq.gz | Fastqsanger.gz | |||
| SRR15034349.fastq.gz | Fastqsanger.gz | |||
| SRR15034350.fastq.gz | Fastqsanger.gz | |||
| SRR15034351.fastq.gz | Fastqsanger.gz | |||
| SRR15034352.fastq.gz | Fastqsanger.gz |
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Project description:Chronic administration of lysergic acid diethylamide (LSD) every other day to rats results in a variety of abnormal behaviors. These build over the 90 day course of treatment and can persist at full strength for at least several months after cessation of treatment. The behaviors are consistent with those observed in animal models of schizophrenia and include hyperactivity, reduced sucrose-preference, and decreased social interaction. In order to elucidate molecular changes that underlie these aberrant behaviors, we chronically treated rats with LSD and performed RNA-sequencing on the medial prefrontal cortex (mPFC), an area highly associated with both the actions of LSD and the pathophysiology of schizophrenia and other psychiatric illnesses. Results: We observed widespread changes in the neurogenetic state of treated animals four weeks after cessation of LSD treatment. QPCR was used to validate a subset of gene expression changes observed with RNA-Seq, and confirmed a significant correlation between the two methods. Functional clustering analysis indicates differentially expressed genes are enriched in pathways involving neurotransmission (Drd2, Gabrb1), synaptic plasticity (Nr2a, Krox20), energy metabolism (Atp5d, Ndufa1) and neuropeptide signaling (Npy, Bdnf), among others. Many processes identified as altered by chronic LSD are also implicated in the pathogenesis of schizophrenia, and genes affected by LSD are enriched with putative schizophrenia genes. Our results provide a relatively comprehensive analysis of mPFC transcriptional regulation in response to chronic LSD, and indicate that the long-term effects of LSD may bear relevance to psychiatric illnesses, including schizophrenia.
2021-11-11 | GSE179379 | GEO
Project description:Chronic administration of lysergic acid diethylamide (LSD) every other day to rats results in a variety of abnormal behaviors. These build over the 90 day course of treatment and can persist at full strength for at least several months after cessation of treatment. The behaviors are consistent with those observed in animal models of schizophrenia and include hyperactivity, reduced sucrose-preference, and decreased social interaction. In order to elucidate molecular changes that underlie these aberrant behaviors, we chronically treated rats with LSD and performed RNA-sequencing on the medial prefrontal cortex (mPFC), an area highly associated with both the actions of LSD and the pathophysiology of schizophrenia and other psychiatric illnesses. We observed widespread changes in the neurogenetic state of treated animals four weeks after cessation of LSD treatment. QPCR was used to validate a subset of gene expression changes observed with RNA-Seq, and confirmed a significant correlation between the two methods. Functional clustering analysis indicates differentially expressed genes are enriched in pathways involving neurotransmission (Drd2, Gabrb1), synaptic plasticity (Nr2a, Krox20), energy metabolism (Atp5d, Ndufa1) and neuropeptide signaling (Npy, Bdnf), among others. Many processes identified as altered by chronic LSD are also implicated in the pathogenesis of schizophrenia, and genes affected by LSD are enriched with putative schizophrenia genes. Our results provide a relatively comprehensive analysis of mPFC transcriptional regulation in response to chronic LSD, and indicate that the long-term effects of LSD may bear relevance to psychiatric illnesses, including schizophrenia.
| S-EPMC4098645 | biostudies-literature
Project description:Background Chromosome 16p11.2 is one of the most significant loci in the genome-wide association study (GWAS) of schizophrenia. Despite several integrative analyses and functional genomics studies have been carried out to identify possible risk genes, their impacts in the pathogenesis of schizophrenia remain to be fully characterized. Methods We performed expression quantitative trait loci (eQTL) and summary-data-based Mendelian randomization (SMR) analyses to identify schizophrenia risk genes in the 16p11.2 GWAS locus. We constructed the murine model with dysregulated expression of risk gene in the medial prefrontal cortex (mPFC) using stereotaxic injection of Adeno-associated Virus (AAV), followed by behavioral assessments, dendritic spine analyses and RNA sequencing. Findings We identified significant associations between elevated INO80E mRNA expression in frontal cortex and risk of schizophrenia. The mice overexpressing Ino80e in mPFC (Ino80e-OE) exhibited schizophrenia-like behaviors, including increased anxiety behavior, anhedonia, and impaired prepulse inhibition (PPI) when compared with control group. The neuronal sparse labeling assay showed that the density of mushroom spines in the pyramidal neurons of mPFC was significantly decreased in Ino80e-OE mice compared with control mice, accompanied by a notable increase in the density of stubby spines. Transcriptomic analysis in the mPFC revealed significant alterations in the mRNA levels of schizophrenia-related genes and processes related to synapses upon overexpressing Ino80e . Interpretation Our results suggest that upregulation of the Ino80e gene in mPFC may induce schizophrenia-like behaviors in mice, further supporting the hypothesis that INO80E is an authentic risk gene.
2024-10-01 | GSE276239 | GEO
Project description:Abdominal Vagal Afferents Modulate the Brain Transcriptome and Behaviors Relevant to Schizophrenia
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Project description:Background: The present study investigated a role of proteins from BET family (epigenetic readers) in schizophrenia-like abnormalities in MAM-E17 model of schizophrenia. Methods: An inhibitor of BET proteins, JQ1, was given during adolescence in postnatal days (P) 23-P30, and behavioral response (sensorimotor gating, recognition memory) and prefrontal cortex (mPFC) function (long-term potentiation (LTP), molecular and proteomic studies) were performed in adult males and females. Results: Deficits in sensorimotor gating and recognition memory were observed only in MAM-treated males. However, adolescent JQ1 treatment affected control, but MAM-treated groups in both sexes. Electrophysiological study showed an LTP impairment only in male MAM-treated animals, and JQ1 did not have any effect on LTP in the mPFC. In contrast, MAM did not affect immediate early gene expression (markers of neuronal and synaptic activity), but JQ1 altered them in both sexes. Proteomic study revealed alterations in MAM-treated groups only in males, while JQ1 affected both sexes. Conclusions: Prenatal MAM administration induced schizophrenia-like abnormalities only in males. In contrast, adolescent JQ1 treatment affected both sexes and induced behavioral changes in control groups, altered a markers of neuronal and synaptic activity and proteomic landscape in the mPFC of both groups (VEH- and MAM-treated). Thus, adolescent inhibition of BET family might change neuroplasticity in the mPFC.
2021-09-07 | PXD027050 | Pride
Project description:Serotonin (5-hydroxytryptamine; 5-HT) 5-HT2-family receptors are the key targets of the prototypical psychedelic LSD. Although the canonical signaling pathway for 5-HT2 receptors is mediated by Gq protein, recent studies suggest that G-protein independent signaling, namely β-arrestin signaling pathway, may be also essential for actions of LSD in vitro and in vivo. To gain comprehensive molecular insights into the signaling mechanisms of LSD, we determined the cryoEM structures of LSD-bound 5-HT2BR in transducer-free state, G protein-coupled state and β-arrestin-1-coupled state, respectively. Besides, we use mass spectrometry to determine the phosphorylation sites of LSD-bound 5-HT2BR.
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Project description:Projection-dependent ribosome profling from mouse mPFC. Ribosome from NAC- and VTA- projecting mPFC cells were immunoprecipited using GFP-trap (Chromotech). Translating mRNA was isolated and analyzed
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Project description:Chronic pain is a major health care problem with great social and economic consequences. Although the medial prefrontal cortex (mPFC) and the thalamus have been implicated in regulating pain, whether and how these regions may involve in pain chronification process have remained largely unknown. Here, we show that Foxp2+ neurons in mPFC, which are corticothalamic (CT) neurons representing the major mPFC output to thalamus, are deactivated in chronic inflammatory pain. Interestingly, prolonged, but not short-term, inactivation of the Foxp2+ neurons in mPFC increases the sensitivity to noxious stimulations. Conversely, chemogenetic activation of this neuronal cluster induces robust antinociceptive effects in both naïve mice and mice with chronic inflammatory pain. Furthermore, we found that the mPFC Foxp2+ neurons project to several thalamic relay nuclei and that activation of the mPFC to the parataenial nucleus of thalamus (PTN) circuit relieves pain. Finally, RNA-seq of the mPFC Foxp2+ neurons revealed that many genes related to neuronal activity are dysregulated in mice with chronic inflammatory pain. Collectively, our studies revealed that Foxp2+ neurons in mPFC that project to thalamus play a critical role in somatosensory processing and pain chronification.
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Project description:The heterogeneity of cortical dopamine D2 receptor expressing cells is not well characterized We performed microarrays to study expression of all the transcriprts specifically from Drd2+ neurons of mouse mPFC. For this we immunoprecipitated ribosomes from mPFC of D2Cre::RiboTag mouse, where ribosomal subunit Rpl22 is tagged with HA epitope specifically in Drd2+ neurons
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Project description:The medial prefrontal cortex (mPFC) is a key brain region involved in controlling working memory, executive function, and self-regulatory behaviours, and its malfunction is a hallmark of several neuropsychiatric disorders such as schizophrenia, depression, and post-traumatic stress disorder. One of the main risk factors for the development of mental illness is chronic stress (CS). Despite some evidence pointing to possible excitation-inhibition (E/I) imbalances caused by CS, the precise mechanism by which CS triggers mPFC dysfunction is not fully understood. Here, using neuroproteomics analysis and whole-cell patch-clamp recordings, we investigated the functional changes in E/I ratio and synaptic drive onto pyramidal neurons and parvalbumin interneurons (PV) in the prelimbic (PL) and infralimbic (IL) cortices, following exposure to 21 days of chronic unpredictable stress. We demonstrate that CS impacts PL- versus IL-pyramidal neurons differently, driving a common decrease in E/I ratio without affecting PV interneurons. Our work brings insightful information and corroborates the hypothesis of stress-induced hypofunction of the mPFC.
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