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Single nucleus analysis of post-mortem brain tissues from Nasu-Hakola disease (NHD) patients

ABSTRACT: Single nucleus analysis of post-mortem brain tissues from Nasu-Hakola disease (NHD) patients

PROVIDER: PRJNA785585 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17097681_1.fastq.gz	Fastqsanger.gz
	SRR17097681_2.fastq.gz	Fastqsanger.gz
	SRR17097682_1.fastq.gz	Fastqsanger.gz
	SRR17097682_2.fastq.gz	Fastqsanger.gz
	SRR17097683_1.fastq.gz	Fastqsanger.gz

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Single nucleus analysis of post-mortem brain tissues from Nasu-Hakola disease (NHD) patients

Project description:The TREM2-DAP12 receptor complex sustains microglia functions. Heterozygous TREM2 variants subtly impair microglia, facilitating manifestation of Alzheimer’s Disease in the elderly. Homozygous inactivating mutations of TREM2 or DAP12 cause Nasu-Hakola disease (NHD), an early-onset dementia with leukoencephalopathy, myelin loss and gliosis. Here we investigated the impact of DAP12 deficiency in microglia and collateral damage to other brain cells by single-nucleus RNA-seq in NHD patients and DAP12 loss-of-function (KΔ75) mice. KΔ75 mice showed signatures of impaired microglia activation that reverberated in mild dysfunction of other brain cells. Paradoxically, NHD microglia were activated and associated with astrocytosis, hypoxia, and neuronal loss signatures. We envision that KΔ75 signatures recapitulate an early NHD stage in which DAP12-deficient microglia fail to clear toxic products generated during brain development and homeostasis. Conversely, NHD signatures reflect a late disease stage in which accumulated toxic products cause a widespread tissue damage that elicits TREM2-DAP12-independent microgliosis, astrogliosis, hypoxia, and neuronal death. This TREM2-DAP12-independent microglia activation in NHD has bearing on potential microglia-based therapies.

2022-12-31 | GSE190013 | GEO

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