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CRISPR/Cas9 mediated intersectional knockout of GSK3b in D2 receptor expressing mPFC neurons reveals contributions to emotional regulation

ABSTRACT: CRISPR/Cas9 mediated intersectional knockout of GSK3b in D2 receptor expressing mPFC neurons reveals contributions to emotional regulation

PROVIDER: PRJNA580259 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10360338_1.fastq.gz	Fastqsanger.gz
	SRR10360338_2.fastq.gz	Fastqsanger.gz
	SRR10360339_1.fastq.gz	Fastqsanger.gz
	SRR10360339_2.fastq.gz	Fastqsanger.gz
	SRR10360340_1.fastq.gz	Fastqsanger.gz

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CRISPR/Cas9 mediated intersectional knockout of GSK3b in D2 receptor expressing mPFC neurons reveals contributions to emotional regulation

Project description:Comparison of ribosome associated RNA between mPFC D2 neurons that lack Gsk3β with Controls

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Prefrontal D2- dopamine receptor deactivates top-down inhibitory control by regulating striatal cholinergic interneurons

Project description:Inhibitory control is a core cognitive function preventing the expression of maladaptive behaviors. This function is overridden in mental illnesses including bipolar disorder, autism spectrum disorders and schizophrenia, causing maladaptive psychomotor agitation. We developed intersectional CRISPR/Cas9 targeting approaches in adult mice to identify receptor/circuit selective mechanisms responsible for inactivation of inhibitory control in two models of amphetamine-induced psychomotor agitation. Inactivation of dopamine D2-receptors in the medial-prefrontal cortex (mPFC) abolished amphetamine-induced: psychomotor agitation, motor sensitization, and cAMP-associated transcriptome changes in the striatum. Further characterization using intersectional projection preparations indicate that these deficits implicate D2-receptors expressed on projection neurons innervating cholinergic interneurons of the dorsomedial striatum (DMS). Trans-synaptic targeting of acetylcholine production in DMS neurons receiving these projections restored psychomotor agitation in mice lacking mPFC D2- receptor expression. These findings identify a circuit by which activation of cortical D2-receptor circumvent an acetylcholine-mediated inhibition of DMS functions by the mPFC to promote psychomotor activation.

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CRISPR-Cas9-Mediated Intersectional Knockout of Glycogen Synthase Kinase 3β in D2 Receptor-Expressing Medial Prefrontal Cortex Neurons Reveals Contributions to Emotional Regulation.

Project description:Glycogen synthase kinase 3β (GSK3β) activity is regulated by dopamine D2 receptor signaling and can be inhibited by psychoactive drugs in a D2 receptor-dependent manner. However, GSK3β is ubiquitously expressed in the brain, and D2 receptor-expressing cells are distributed as a mosaic in multiple cortical regions. This complicates the interrogation of GSK3β functions in cortical D2 cells in a circuit-defined manner using conventional animal models. We used a CRISPR-Cas9-mediated intersectional approach to achieve targeted deletion of GSK3β in D2-expressing neurons of the adult medial prefrontal cortex (mPFC). Isolation and analysis of ribosome-associated RNA specifically from mPFC D2 neurons lacking GSK3β demonstrated large-scale translatome alterations. Deletion of GSK3β in mPFC D2 neurons revealed its contribution to anxiety-related, cognitive, and social behaviors. Our results underscore the viability of an intersectional knockout approach to study functions of a ubiquitous gene in a network-defined fashion while uncovering the contribution of GSK3β expressed in mPFC D2 neurons in the regulation of behavioral dimensions related to mood and emotions. This advances our understanding of GSK3β action at a brain circuit level and can potentially lead to the development of circuit selective therapeutics.

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VTA and NAC labeled ribosome from mPFC

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A genetically defined mPFC-thalamic circuit underlies pain chronicity

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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Epileptogenesis alters gene expression pattern in rats subjected to amygdala-dependent emotional learning

Project description:Here we tested a hypothesis that epileptogenesis influences expression pattern of genes in the basolateral amygdala that are critical for fear conditioning. Whole genome molecular profiling of basolateral rat amygdala was performed to compare the transcriptome changes underlying fear learning in epileptogenic and control animals. Our analysis revealed that after acquisition of fear conditioning 26 genes were regulated differently in the basolateral amygdala of both groups. Thus, our study provides the first evidence that not only the damage to the neuronal pathways but also altered composition or activity level of molecular machinery responsible for formation of emotional memories within surviving pathways can contribute to impairment in emotional learning in epileptogenic animals. Understanding the function of those genes in emotional learning provides an attractive avenue for identification of novel drug targets for treatment of emotional disorders after epileptogenesis-inducing insult.

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