DECODER: A probabilistic approach to integrate big data reveals mitochondrial Complex I as a potential therapeutic target for Alzheimer’s disease

Author:

Celik Safiye,Russell Josh C.,Pestana Cezar R.,Lee Ting-I,Mukherjee Shubhabrata,Crane Paul K.,Keene C. Dirk,Bobb Jennifer F.,Kaeberlein Matt,Lee Su-In

Abstract

AbstractIdentifying gene expression markers for Alzheimer’s disease (AD) neuropathology through meta-analysis is a complex undertaking because available data are often from different studies and/or brain regions involving study-specific confounders and/or region-specific biological processes. Here we introduce a novel probabilistic model-based framework, DECODER, leveraging these discrepancies to identify robust biomarkers for complex phenotypes. Our experiments present: (1) DECODER’s potential as a general meta-analysis framework widely applicable to various diseases (e.g., AD and cancer) and phenotypes (e.g., Amyloid-β (Aβ) pathology, tau pathology, and survival), (2) our results from a meta-analysis using 1,746 human brain tissue samples from nine brain regions in three studies — the largest expression meta-analysis for AD, to our knowledge —, and (3)in vivovalidation of identified modifiers of Aβ toxicity in a transgenicCaenorhabditis elegansmodel expressing AD-associated Aβ, which pinpoints mitochondrial Complex I as a critical mediator of proteostasis and a promising pharmacological avenue toward treating AD.

Publisher

Cold Spring Harbor Laboratory

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