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• W4386692014 abstract "Background Recently, single-nucleus RNA-seq (snRNA-seq) analyses have revealed important cellular and functional features of Alzheimer's disease (AD), a prevalent neurodegenerative disease. However, our knowledge regarding intercellular communication mediated by dysregulated ligand-receptor (LR) interactions remains very limited in AD brains. Methods We systematically assessed the intercellular communication networks by using a discovery snRNA-seq dataset comprising 69,499 nuclei from 48 human postmortem prefrontal cortex (PFC) samples. We replicated the findings using an independent snRNA-seq dataset of 56,440 nuclei from 18 PFC samples. By integrating genetic signals from AD genome-wide association studies (GWAS) summary statistics and whole genome sequencing (WGS) data, we prioritized AD-associated Gene Ontology (GO) terms containing dysregulated LR interactions. We further explored drug repurposing for the prioritized LR pairs using the Therapeutic Targets Database. Results We identified 316 dysregulated LR interactions across six major cell types in AD PFC, of which 210 pairs were replicated. Among the replicated LR signals, we found globally downregulated communications in astrocytes-to-neurons signaling axis, characterized, for instance, by the downregulation of APOE-related and Calmodulin (CALM)-related LR interactions and their potential regulatory connections to target genes. Pathway analyses revealed 60 GO terms significantly linked to AD, highlighting Biological Processes such as 'amyloid precursor protein processing' and 'ion transmembrane transport', among others. We prioritized several drug repurposing candidates, such as cromoglicate, targeting the identified dysregulated LR pairs. Conclusions Our integrative analysis identified key dysregulated LR interactions in a cell type-specific manner and the associated GO terms in AD, offering novel insights into potential therapeutic targets involved in disrupted cell-cell communication in AD." @default.
• W4386692014 created "2023-09-13" @default.
• W4386692014 creator A5006688612 @default.
• W4386692014 creator A5043870569 @default.
• W4386692014 creator A5067038670 @default.
• W4386692014 creator A5080832231 @default.
• W4386692014 date "2023-09-12" @default.
• W4386692014 modified "2023-10-14" @default.
• W4386692014 title "Unraveling the intercellular communication disruption and key pathways in Alzheimer's disease: An integrative study of single-nucleus transcriptomes and genetic association" @default.
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• W4386692014 doi "https://doi.org/10.21203/rs.3.rs-3335643/v1" @default.
• W4386692014 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37790454" @default.
• W4386692014 hasPublicationYear "2023" @default.
• W4386692014 type Work @default.
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• W4386692014 hasAuthorship W4386692014A5006688612 @default.
• W4386692014 hasAuthorship W4386692014A5043870569 @default.
• W4386692014 hasAuthorship W4386692014A5067038670 @default.

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