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A neuronal transcription factor is required in the prefrontal cortex for transcriptional and behavioral adaptation to chronic stress

ABSTRACT: A neuronal transcription factor is required in the prefrontal cortex for transcriptional and behavioral adaptation to chronic stress

PROVIDER: PRJNA608904 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11185748_1.fastq.gz	Fastqsanger.gz
	SRR11185748_2.fastq.gz	Fastqsanger.gz
	SRR11185749_1.fastq.gz	Fastqsanger.gz
	SRR11185749_2.fastq.gz	Fastqsanger.gz
	SRR11185750_1.fastq.gz	Fastqsanger.gz

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Developmental Regulation and Individual Differences of Neuronal Epigenomes in the Prefrontal Cortex

Project description:We report global distribution of trimethylated Histone H3 Lysine 4 (H3K4me3) in human prefrontal cortex neurons at different ages Neuronal nuclei from human prefrontal cortex were isolated by FACS. Regions marked by H3K4me3 were identified by chromatin immunoprecipiation followed by deep sequencing.

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Early-life prefrontal cortex inhibition and early-life stress lead to long-lasting behavioral, transcriptional, and physiological impairments

Project description:Early-life stress has been linked to multiple neurodevelopmental and neuropsychiatric deficits. Our previous studies have linked maternal presence/absence from the nest in developing rat pups to changes in prefrontal cortex activity. Furthermore, we have shown that these changes are modulated by serotonergic signaling. Here we test whether changes in prefrontal cortex activity during early-life affect the developing cortex leading to behavioral alterations in the adult. We show that inhibiting the prefrontal cortex of mouse pups leads to cognitive deficits in the adult comparable to those seen following maternal separation. Moreover, we show that activating the prefrontal cortex during maternal separation can prevent these behavioral deficits. To test how maternal separation affects the transcriptional profile of the prefrontal cortex we performed single-nucleus RNA sequencing. Maternal separation lead to differential gene expression almost exclusively in inhibitory neurons. Among others, we found changes in GABAergic and serotonergic pathways in these interneurons. Interestingly, both maternal separation and early-life prefrontal cortex inhibition led to changes in physiological responses in prefrontal activity to GABAergic and serotonergic antagonists that were similar to the responses of more immature brains. Prefrontal activation during maternal separation prevented these changes. These data point to a crucial role of prefrontal cortex activity during early-life in behavioral expression in adulthood

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A neuronal transcription factor is required in the prefrontal cortex for transcriptional and behavioral adaptation to chronic stress

Project description:Stressful life events increase risk for depression, yet the molecular mechanisms by which stress is encoded in the brain to induce maladaptive behaviors are not well understood. Emerging evidence has shown that stress dysregulates gene expression in the brain, yet the cellular origin of these gene expression alterations has yet to be determined. To address this question, we used a chronic unpredictable stress (CUS) paradigm that drives depressive- and anxiety-like behaviors in male and female mice and single-nucleus transcriptomics to identify cell type-specific gene expression changes in the cortex. We find that neocortical excitatory neurons are particularly vulnerable to chronic stress exposure, and that CUS reprograms these cells to decrease transcription of synaptic genes involved in glutamatergic neurotransmission. We identify the ubiquitously expressed factor, Yin Yang 1 (YY1), as a key driver of the transcriptional reprogramming observed in excitatory neurons isolated from CUS mice. Selective depletion of YY1 in excitatory neurons of the prefrontal cortex (PFC) increases the stress sensitivity of mice, inducing depressive- and anxiety-related behaviors following an abbreviated stress exposure and deregulating expression of key stress-related genes in the PFC. Importantly, we find that YY1 functions in both males and females to facilitate stress coping. This work establishes a novel mechanism underlying chronic stress-induced behavior, in which epigenetic responses to stress in PFC excitatory neurons are mediated by stress-dependent YY1 activity. Our findings demonstrate how post-mitotic neurons adapt to stress experience and identify a novel molecular target that is generalizable to males and females for therapeutic treatment of stress-related neuropsychiatric disorders.

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Project description:To unravel the gene expression changes during postnatal prefrontal cortex development, RNA-seq was performed in the rat medial prefrontal cortex at five time points from early life to adulthood (postnatal day 8, 14, 21, 35 and 70) and differential expression of protein-coding genes, lincRNAs and alternative exons was analyzed. A switch from neuronal network development to maintenance during postnatal rat prefrontal cortex development was shown.

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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.

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2023-07-19 | GSE224114 | GEO

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