Please note that we have stopped the regular imports of Gene Expression Omnibus (GEO) data into ArrayExpress. This may not be the latest version of this experiment.
E-GEOD-44593 - Molecular Evidence for a Dimensional Basis of Depression
Released on 3 July 2016, last updated on 28 December 2016
Here we identified a set of genes with frequent expression changes in the postmortem brain of MDD subjectsand show that this gene set is genetically related to brain and organ illnesses frequently associated with MDD. Specifically, we performed a meta-analysis of eight gene array studies in three corticolimbic brain regions and identified ~450 genes frequentlyderegulated in MDD (n=103 subjects, 50.5%MDD). These “MetaA-MDD” genes includepreviously-implicated neuroplasticity- and stress-related genes (CRH, BDNF, VGF), encompass multiple synaptic and signaling pathways, and suggests complex changes in cell structure and function. MetaA-MDD genes display low connectivity andhubnessin coexpression networks andare evenly distributed throughout the genome. However, MetaA-MDD genesare significantly over-represented in gene sets identified by the genome-wide association studies for brain disorders and organ diseases sharing clinical co-morbidity with MDD (e.g., cardiovascular, metabolic syndrome), but not for other diseases or body functions. Together, this study describes a robustmolecular characterization of altered brain function in MDD, and provides evidence for a shared genetic structure linking MDD andrelated illnesses, together biologically defining abroader dimensional definition ofa depressive-like syndrome. 14 pairs of human postmotem AMY samples of MDD patients and control
transcription profiling by array
YING DING <email@example.com>, Etienne Sibille