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CCR2+ monocytes promote white matter injury and cognitive dysfunction after myocardial infarction

ABSTRACT: CCR2+ monocytes promote white matter injury and cognitive dysfunction after myocardial infarction

PROVIDER: PRJNA1114776 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR29134640.fastq.gz	Fastqsanger.gz
	SRR29134641.fastq.gz	Fastqsanger.gz

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CCR2+ monocytes promote white matter injury and cognitive dysfunction after myocardial infarction

Project description:Survivors of myocardial infarction are at increased risk for vascular dementia. Neuroinflammation has been implicated in the pathogenesis of vascular dementia, yet little is known about the cellular and molecular mediators of neuroinflammation after myocardial infarction. Using a mouse model of myocardial infarction coupled with flow cytometric analyses and immunohistochemistry, we discovered increased monocyte abundance in the brain after myocardial infarction, which was associated with increases in brain-resident perivascular macrophages and microglia. Myeloid cell recruitment and activation was also observed in post-mortem brains of humans that died after myocardial infarction. Spatial and single cell transcriptomic profiling of brain-resident myeloid cells after experimental myocardial infarction revealed increased expression of monocyte chemoattractant proteins. In parallel, myocardial infarction increased crosstalk between brain-resident myeloid cells and oligodendrocytes, leading to neuroinflammation, white matter injury, and cognitive dysfunction. Inhibition of monocyte recruitment preserved white matter integrity and cognitive function, linking monocytes to neurodegeneration after myocardial infarction. Together, these preclinical and clinical results demonstrate that monocyte infiltration into the brain after myocardial infarction initiate neuropathological events that lead to vascular dementia.

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