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Basic Science and Pathogenesis.
Alzheimers Dement
December 2024
University of California, Irvine, Irvine, CA, USA.
Background: In several large genome-wide association studies (GWAS), genetic polymorphisms of Abi3 have been identified as a risk factor for late-onset Alzheimer's Disease (LOAD). ABI3 along with ABI1 and ABI2, regulate the formation of the WAVE complex which in turn, regulates actin dynamics. ABI3 is highly expressed in microglia in the brain, however, the function of ABI3 in microglia is relatively unknown.
View Article and Find Full Text PDFBackground: A complex, multicellular disease with genetic and immunological elements, Alzheimer's disease (AD) affects millions worldwide. There has been previous research linking AD to the missense variants ABI3-rs616338-T and PLCG2-rs72824905-G, and the altered expression of these genes has been shown to disrupt microglial function. In our understanding of AD risk and resilience, limited research has been conducted on how these variants affect microglial subtypes and states in AD.
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
John P. Hussman Institute for Human Genomics, Miller School of Medicine, Miami, FL, USA.
Background: We identified the missense variant Ser1038Cys (rs377155188) in the tetratricopeptide repeat domain 3 (TTC3) gene that segregate in a non-Hispanic white late onset Alzheimer disease (LOAD) family. This variant is predicted to be deleterious and extremely rare (MAF<0.01%).
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
Amsterdam UMC location VUmc, Amsterdam, Noord-holland, Netherlands.
Background: SORL1 encodes the retromer-associated receptor SORLA that functions in endosomal recycling. Rare variants in SORL1 have been associated with Alzheimer's disease (AD) and rare pathogenic variants are estimated to occur in up to 2.75% of early onset AD patients and in 1.
View Article and Find Full Text PDFBackground: The sortilin-related receptor 1 protein, SORL1, interacts with retromer to regulate trafficking of cargo out of the early endosome. Genetic variants in SORL1 that lead to a premature protein truncation (PTVs) are observed almost exclusively in Alzheimer's disease (AD) patients, suggesting SORL1's haploinsufficiency may be causal for AD. However, the large majority of SORL1 variants are rare missense variants which affect diverse structural domains, some of which may be causative for disease or (strongly) risk-increasing, while others are (likely) benign.
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