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Spermidine reduces neuroinflammation and soluble amyloid beta in an Alzheimer’s disease mouse model

ABSTRACT: Spermidine reduces neuroinflammation and soluble amyloid beta in an Alzheimer’s disease mouse model

PROVIDER: PRJNA849598 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR19664485_1.fastq.gz	Fastqsanger.gz
	SRR19664485_2.fastq.gz	Fastqsanger.gz
	SRR19664486_1.fastq.gz	Fastqsanger.gz
	SRR19664486_2.fastq.gz	Fastqsanger.gz
	SRR19664487_1.fastq.gz	Fastqsanger.gz

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Spermidine reduces neuroinflammation and soluble amyloid beta in an Alzheimer’s disease mouse model

Project description:Deposition of amyloid beta (Aβ) and hyperphosphorylated tau along with glial cell-mediated neuroinflammation are prominent pathogenic hallmarks of Alzheimer’s disease (AD). In recent years, impairment of autophagy has been found to be another important feature contributing to AD progression. Therefore, the potential of the autophagy activator spermidine, a small body-endogenous polyamine often used as dietary supplement, was assessed on Aβ pathology and glial cell-mediated neuroinflammation. Oral treatment of the amyloid prone AD-like APPPS1 mice with spermidine reduced neurotoxic soluble Aβ and decreased AD-associated neuroinflammation during disease progression. Mechanistically, single nuclei sequencing revealed AD-associated microglia to be the main target of spermidine. This microglia population was characterized by increased AXL levels and expression of genes implicated in cell migration and phagocytosis. Our data highlight that the autophagy activator spermidine holds the potential to enhance Aβ degradation and to counteract glia-mediated neuroinflammation in AD pathology.

2022-07-04 | GSE206202 | GEO

Spermidine reduces neuroinflammation and soluble amyloid beta in an Alzheimer’s disease mouse model

Project description:Deposition of amyloid beta (Aβ) and hyperphosphorylated tau along with glial cell-mediated neuroinflammation are prominent pathogenic hallmarks of Alzheimer’s disease (AD). In recent years, impairment of autophagy has been found to be another important feature contributing to AD progression. Therefore, the potential of the autophagy activator spermidine, a small body-endogenous polyamine often used as dietary supplement, was assessed on Aβ pathology and glial cell-mediated neuroinflammation. Oral treatment of the amyloid prone AD-like APPPS1 mice with spermidine reduced neurotoxic soluble Aβ and decreased AD-associated neuroinflammation. A subsequent proteome analysis of isolated microglia confirmed the anti-inflammatory and revealed cytoskeletal effects of spermidine in APPPS1 mice. Our data highlight that the autophagy activator spermidine holds the potential to enhance Aβ degradation and to counteract microglia-mediated neuroinflammation in AD pathology.

2022-07-04 | PXD034638 | Pride

Spermidine reduces neuroinflammation and soluble amyloid beta in an Alzheimer's disease mouse model.

Project description:BackgroundDeposition of amyloid beta (Aβ) and hyperphosphorylated tau along with glial cell-mediated neuroinflammation are prominent pathogenic hallmarks of Alzheimer's disease (AD). In recent years, impairment of autophagy has been identified as another important feature contributing to AD progression. Therefore, the potential of the autophagy activator spermidine, a small body-endogenous polyamine often used as dietary supplement, was assessed on Aβ pathology and glial cell-mediated neuroinflammation.ResultsOral treatment of the amyloid prone AD-like APPPS1 mice with spermidine reduced neurotoxic soluble Aβ and decreased AD-associated neuroinflammation. Mechanistically, single nuclei sequencing revealed AD-associated microglia to be the main target of spermidine. This microglia population was characterized by increased AXL levels and expression of genes implicated in cell migration and phagocytosis. A subsequent proteome analysis of isolated microglia confirmed the anti-inflammatory and cytoskeletal effects of spermidine in APPPS1 mice. In primary microglia and astrocytes, spermidine-induced autophagy subsequently affected TLR3- and TLR4-mediated inflammatory processes, phagocytosis of Aβ and motility. Interestingly, spermidine regulated the neuroinflammatory response of microglia beyond transcriptional control by interfering with the assembly of the inflammasome.ConclusionsOur data highlight that the autophagy activator spermidine holds the potential to enhance Aβ degradation and to counteract glia-mediated neuroinflammation in AD pathology.

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Reduced binding of apoE4 to complement factor H promotes amyloid-β oligomerization and neuroinflammation

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