Comparative analysis of Alzheimer's disease knock-in model brain transcriptomes implies changes to energy metabolism as a causative pathogenic stress
Barthelson, K.; Newman, M.; Lardelli, M.
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Energy production is the most fundamentally important cellular activity supporting all other functions, particularly in highly active organs such as brains. Here, we summarise transcriptome analyses of young adult (pre-disease) brains from a collection of eleven early-onset familial Alzheimers disease (EOfAD)-like and non-EOfAD-like mutations in three zebrafish genes. The one cellular activity consistently predicted as affected by only the EOfAD-like mutations is oxidative phosphorylation that produces most of the brains energy. All the mutations were predicted to affect protein synthesis. We extended our analysis to knock-in mouse models of APOE alleles and found the same effect for the late onset Alzheimers disease risk allele {varepsilon}4. Our results support a common molecular basis for initiation of the pathological processes leading to both early and late onset forms of Alzheimers disease and illustrate the utility of both zebrafish and knock-in, single EOfAD mutation models for understanding the causes of this disease.
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