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Single-nucleus RNA-sequencing of orbitofrontal cortex in rat model of Methamphetamine-induced sensitization

ABSTRACT: Single-nucleus RNA-sequencing of orbitofrontal cortex in rat model of Methamphetamine-induced sensitization

PROVIDER: PRJNA1116571 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR29183069_1.fastq.gz	Fastqsanger.gz
	SRR29183069_2.fastq.gz	Fastqsanger.gz
	SRR29183070_1.fastq.gz	Fastqsanger.gz
	SRR29183070_2.fastq.gz	Fastqsanger.gz
	SRR29183071_1.fastq.gz	Fastqsanger.gz

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Single-nucleus RNA-sequencing of orbitofrontal cortex in rat model of Methamphetamine-induced sensitization

Project description:Due to the complexity and diversity of the cellular changes, our understanding of the exact molecular and cellular mechanisms underpinning behavioral sensitization remains incomplete. Therefore, the present study explored the single-cell transcriptional changes in the orbitofrontal cortex (OFC) — a region implicated in decision-making and reward-related behaviors15,16— in a rodent model of methamphetamine-induced sensitization. Our study provides insights into the molecular mechanisms cells associated with the development of drug addiction.

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Project description:Due to the complexity and diversity of the cellular changes, our understanding of the exact molecular and cellular mechanisms underpinning behavioral sensitization remains incomplete, particularly, the role of non-neuronal cells. Therefore, the present study explored the single-cell transcriptional changes in the orbitofrontal cortex (OFC) - a region implicated in decision-making and reward-related behaviors in a rodent model of methamphetamine-induced sensitization. Our study provides insights into the molecular mechanisms underlying dysfunction of microglial cells associated with the development of drug addiction.

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Single-cell RNA-seq analysis of orbitofrontal cortex in rodent model of Methamphetamine-induced sensitization

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Project description:Methamphetamine (Meth) seeking progressively increases after withdrawal (incubation of Meth craving), but the transcriptional mechanisms that contribute to this incubation are unknown. Here we used RNA-sequencing to analyze transcriptional profiles associated with incubation of Meth craving in central amygdala (CeA) and orbitofrontal cortex (OFC), two brain areas previously implicated in relapse to drug seeking. We trained rats to self-administer either saline (control condition) or Meth (10 days; 9 h/day, 0.1 mg/kg/infusion). Next, we collected brain tissue from CeA and OFC on withdrawal day 2 (when Meth seeking is low and non-incubated) and on day 35 (when Meth seeking is high and incubated), for subsequent RNA-sequencing. In CeA, we identified 10-fold more differentially expressed genes (DEGs) on withdrawal day 35 than day 2. These genes were enriched for several biological processes, including protein ubiquitination and histone methylation. In OFC, we identified many fewer expression changes than in CeA. Interestingly, there were more DEGs on withdrawal day 2 than on day 35. Several genes in OFC showed opposing expression changes on withdrawal day 2 (increase) when compared to withdrawal day 35 (decrease), which was further validated by qPCR. Our analyses highlight the CeA as a key region of transcriptional regulation associated with incubation of Meth seeking. In contrast, transcriptional regulation in OFC may contributes to Meth seeking during early withdrawal. Overall, these findings provide a unique resource of gene expression data for future studies examining transcriptional mechanisms in CeA that mediate Meth seeking after prolonged withdrawal.

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