domingo, 8 de enero de 2012

Genetics of late-onset Alzheimer's dise... [Int J Alzheimers Dis. 2011] - PubMed - NCBI

Int J Alzheimers Dis. 2011;2011:832379. Epub 2011 Dec 10.

Genetics of late-onset Alzheimer's disease: update from the alzgene database and analysis of shared pathways.


Institute of Psychiatry, University of Bologna, Viale Carlo Pepoli 5, 40123 Bologna, Italy.


The genetics of late-onset Alzheimer's disease (LOAD) has taken impressive steps forwards in the last few years. To date, more than six-hundred genes have been linked to the disorder. However, only a minority of them are supported by a sufficient level of evidence. This review focused on such genes and analyzed shared biological pathways. Genetic markers were selected from a web-based collection (Alzgene). For each SNP in the database, it was possible to perform a meta-analysis. The quality of studies was assessed using criteria such as size of research samples, heterogeneity across studies, and protection from publication bias. This produced a list of 15 top-rated genes: APOE, CLU, PICALM, EXOC3L2, BIN1, CR1, SORL1, TNK1, IL8, LDLR, CST3, CHRNB2, SORCS1, TNF, and CCR2. A systematic analysis of gene ontology terms associated with each marker showed that most genes were implicated in cholesterol metabolism, intracellular transport of beta-amyloid precursor, and autophagy of damaged organelles. Moreover, the impact of these genes on complement cascade and cytokine production highlights the role of inflammatory response in AD pathogenesis. Gene-gene and gene-environment interactions are prominent issues in AD genetics, but they are not specifically featured in the Alzgene database.

[PubMed - in process]
PMCID: PMC3235576
Free PMC Article
Genetics of late-onset Alzheimer's dise... [Int J Alzheimers Dis. 2011] - PubMed - NCBI

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