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A comprehensive analysis of differentially expressed genes and pathways in abdominal aortic aneurysm

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The current study aimed to investigate the molecular mechanism underlying abdominal aortic aneurysm (AAA) via various bioinformatics techniques. Gene expression profiling analysis of differentially expressed genes (DEGs) between AAA samples and normal controls was conducted. The Database for Annotation, Visualization and Integrated Discovery tool was utilized to perform Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes analyses for DEGs and clusters from the proteinprotein interaction (PPI) network, which was constructed using the Search Tool for the Retrieval of Interacting Genes. In addition, important transcription factors (TFs) that regulated DEGs were investigated. A total of 346 DEGs were identified between AAA samples and healthy controls. Additionally, four clusters were identified from the PPI network. Cluster 1 was associated with sensory perception of smell and the olfactory transduction subpathway. The most significant GO function terms for cluster 2 and 3 were response to virus and defense response, respectively. Cluster 4 was associated with mitochondriaassociated functions and the oxidative phosphorylation subpathway. Early growth response1 (EGR1), Myc, activating transcription factor 5 (ATF5) and specificity protein (SP) 1:SP3 were identified to be critical TFs in this disease. The present study suggested that the olfactory transduction subpathway, mitochondria and oxidative phosphorylation pathways were involved in AAA, and TFs, such as EGR1, Myc, ATF5 and SP1:SP3, may be potential candidate molecular targets for this disease.
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Document Type: Research Article

Affiliations: Department of Vascular Surgery, Renji Hospital of Shanghai Jiao Tong University School of Medicine, Shanghai 200127, P.R. China

Publication date: August 1, 2015

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  • Molecular Medicine Reports is a monthly, peer-reviewed journal available in print and online, that includes studies devoted to molecular medicine, underscoring aspects including pharmacology, pathology, genetics, neurosciences, infectious diseases, molecular cardiology and molecular surgery. In vitro and in vivo studies of experimental model systems pertaining to the mechanisms of a variety of diseases offer researchers the necessary tools and knowledge with which to aid the diagnosis and treatment of human diseases.
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