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Molecular mechanisms for Krüppel-like factor 13 actions in hippocampal neurons [RNA-seq]

ABSTRACT: Molecular mechanisms for Krüppel-like factor 13 actions in hippocampal neurons [RNA-seq]

PROVIDER: PRJNA623921 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11511121.fastq.gz	Fastqsanger.gz
	SRR11511122.fastq.gz	Fastqsanger.gz
	SRR11511123.fastq.gz	Fastqsanger.gz
	SRR11511124.fastq.gz	Fastqsanger.gz
	SRR11511125.fastq.gz	Fastqsanger.gz

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Molecular mechanisms for Krüppel-like factor 13 actions in hippocampal neurons

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Molecular mechanisms for Krüppel-like factor 13 actions in hippocampal neurons [ChSP-seq]

Project description:Krüppel-like factors (KLFs) play key roles in nervous system development and function. Several KLFs are known to promote, and then maintain neural cell differentiation. Our previous work focused on the actions of KLF9 in mouse hippocampal neurons. Here we investigated genomic targets and functions of KLF9’s paralog KLF13, with the goal of understanding how these two closely related transcription factors influence hippocampal cell function, proliferation, survival and regeneration. We engineered the adult mouse hippocampus-derived cell line HT22 to control Klf13 expression with doxycycline. We also generated HT22 Klf13 knock out cells, and we analyzed primary hippocampal cells from wild type and Klf13-/- mice. RNA sequencing showed that KLF13, like KLF9, acts predominantly as a transcriptional repressor in hippocampal neurons and can regulate other Klf genes. Pathway analysis revealed that genes regulated by KLF13 are involved in cell cycle, cell survival, cytoarchitecture regulation, among others. Chromatin-streptavidin sequencing conducted on chromatin isolated from HT22 cells expressing biotinylated KLF13 identified 9506 genomic targets; 79% were located 1 kilobase upstream of transcription start sites. Transfection-reporter assays confirmed that KLF13 can directly regulate transcriptional activity of its target genes. Comparison of the target genes of KLF9 and KLF13 found that they share some functions that were likely present in their common ancestor, but have also acquired distinct functions during evolution. Flow cytometry showed that KLF13 promotes cell cycle progression, and it protects cells from glutamate-induced excitotoxic damage. Taken together, our findings establish novel roles and molecular mechanisms for KLF13 actions in mammalian hippocampal neurons.

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Molecular mechanisms for Krüppel-like factor 13 actions in hippocampal neurons

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Project description:Changes in gene expression in HT22 cells after forced expression of KLF13 for 8 hr were analyzed by RNA sequencing

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Hippocampal neurons, Illumina experiments

Project description:Ongoing neuronal activity during development and plasticity acts to refine synaptic connections and contributes to the induction of plasticity and ultimately long term memory storage. Activity-dependent post-transcriptional control of mRNAs occurs through transport to axonal and dendritic compartments, local translation, and mRNA stability. We have identified a mechanism that contributes to activity-dependent regulation of mRNA stability during synaptic plasticity. In this study we demonstrate rapid, post-transtriptional control over process-enriched mRNAs by neuronal activity. Systematic analysis of the 3'-UTRs of destablized transcripts, identifies enrichment in sequence motifs corresponding to miRNA binding sites. The miRNAs that were identified, miR-326-3p/miR-330-5p, miR-485-5p, miR-666-3p, and miR-761 are predicted to regulate networks of genes important in plasticity and development. We find that these miRNAs are developmentally regulated in the hippocampus, many increasing by postnatal day 14. We further show that miR-485-5p controls NGF-induced neurite outgrowth in PC12 cells, tau expression, and axonal development in hippocampal neurons. miRNAs can function at the synapse to rapidly control and affect short- and long-term changes at the synapse. These processes likely occur during refinement of synaptic connections and contribute to the induction of plasticity and learning and memory. 12 hippocampal cell culture samples analysed, 3 coverslips pooled per sample. Treatments are as follows: Block: an inhibitor cocktail containing 50 µM D-APV, 40 µM CNQX, and 100 nM TTX for 3 hrs Activity: 50 µM bicuculline (BiC)/500 µM 4-Aminopyridine ActD: 25 µM actinomycin D

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