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Acetate supplementation rescues social deficits and alters transcriptional regulation in prefrontal cortex of Shank3 deficient mice

ABSTRACT: Acetate supplementation rescues social deficits and alters transcriptional regulation in prefrontal cortex of Shank3 deficient mice

PROVIDER: PRJNA938142 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23603318_1.fastq.gz	Fastqsanger.gz
	SRR23603318_2.fastq.gz	Fastqsanger.gz
	SRR23603319_1.fastq.gz	Fastqsanger.gz
	SRR23603319_2.fastq.gz	Fastqsanger.gz
	SRR23603320_1.fastq.gz	Fastqsanger.gz

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Acetate supplementation rescues social deficits and alters transcriptional regulation in prefrontal cortex of Shank3 deficient mice

Project description:Autism spectrum disorder (ASD) is a heterogenous neurodevelopmental disorder with complex pathophysiology including both genetic and environmental factors. Recent evidence demonstrates the gut microbiome and its resultant metabolome can influence brain and behavior and have been implicated in ASD. To investigate gene by microbiome interactions in a model for genetic risk of ASD, we utilize mutant mice carrying a deletion of the ASD-associated Shank3 gene (Shank3KO). Shank3KO have altered microbiome composition and function at baseline in addition to social deficits. Further depletion of the microbiome with antibiotics exacerbates social deficits in Shank3KO, and results in transcriptional changes in the frontal cortex. Supplementation with the microbial metabolite acetate leads to reversal of social behavioral phenotypes even in mice with a depleted microbiome, and significantly alters transcriptional regulation in the prefrontal cortex. These results suggest a key role for the gut microbiome and the neuroactive metabolite acetate in regulating ASD-like behaviors.

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Inhibition of TRPV4 rescues impaired excitability and social deficits in NAc-specific Shank3-deficient mice.

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Inhibition of TRPV4 rescues impaired excitability and social deficits in NAc-specific Shank3-deficient mice.

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Amelioration of autism-like social deficits by targeting histone methyltransferases EHMT1/2 in Shank3-deficient mice

Project description:Many of the genes disrupted in autism are identified as histone-modifying enzymes and chromatin remodelers, most prominently those that mediate histone methylation/demethylation. However, the role of histone methylation enzymes in the pathophysiology and treatment of autism remains unknown. To address this, we used mouse models of haploinsufficiency of the Shank3 gene (a highly penetrant monogenic autism risk factor), which exhibits prominent autism-like social deficits. We found that histone methyltransferases EHMT1 and EHMT2, as well as histone lysine 9 dimethylation (specifically catalyzed by EHMT1/2), were selectively increased in the prefrontal cortex (PFC) of Shank3-deficient mice and autistic human postmortem brains. Treatment with the EHMT1/2 inhibitor UNC0642 or knockdown of EHMT1/2 in PFC induced a robust rescue of autism-like social deficits in Shank3-deficient mice, and restored NMDAR-mediated synaptic function. Activityregulated cytoskeleton-associated protein (Arc) was identified as one of the causal factors underlying the rescuing effects of UNC0642 on NMDAR function and social behaviors in Shank3-deficient mice. UNC0642 treatment also restored a large set of genes involved in neural signaling in PFC of Shank3-deficient mice. These results suggest that targeting histone methylation enzymes to adjust gene expression and ameliorate synaptic defects could be a potential therapeutic strategy for autism.

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Retinoic acid supplementation rescues the social deficits in Fmr1 knockout mice

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Retinoic acid supplementation rescues the social deficits in Fmr1 knockout mice

Project description:Autism spectrum disorder (ASD) is a hereditary intellectual disability. Fragile X syndrome (FXS) is the leading cause of ASD and mainly results from the abnormal CGG amplification (>200 repeats) of the fragile X mental retardation 1 (Fmr1) gene. All-trans retinoic acid (RA) is involved in synaptic plasticity, neuronal differentiation and brain maturation. RA-mediated synaptic strength regulation was abolished in FXS patient-derived induced pluripotent stem (iPS) cells. Previous work on the ASD model with excessive UBE3A expression, of which the ASD-like behaviors caused by repression in RA signaling were successfully ameliorated by oral supplementation of RA. In this study, we used male Fmr1 knock-out (KO) mice to explore the effect of RA exerting on the behaviors. Our results indicated that RA supplementation can alleviate the defects in social novelty. We performed RNA sequencing to find out the differentially expressed genes (DEGs) in the Fmr1 KO group, of which the expression levels were restored to the similar level as those in the wild-type (WT) group after RA supplementation, such as Per1, Per2 and Foxp2. Besides, several DEGs associated with neuronal functions were also identified, like Arc, Ccn2, Foxp2, Xdh, Lepr, Serpina3n andTnfsf10. our findings that RA supplementation improved social novelty behavior in Fmr1 KO mice provided a potential therapeutic intervention method for FXS, which may further be used in other disease models with defective RA signaling.

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