The online version of this article (doi:10.1186/1475-2840-11-15) contains supplementary material, which is available to authorized users.
The authors declare that they have no competing interests.
VS participated in the design of the study, performed the bioinformatic analysis and drafted the manuscript. SK participated in the design of the study and in interpretation of data. MO and MLH collected and organized patient data. LMR participated in the design of the study and in interpretation of data, and drafted the manuscript. All authors read and approved the final manuscript.
Generalized arterial alterations, such as endothelial dysfunction, medial matrix accumulations, and calcifications are associated with type 2 diabetes (T2D). These changes may render the vessel wall more susceptible to injury; however, the molecular characteristics of such diffuse pre-atherosclerotic changes in diabetes are only superficially known.
To identify the molecular alterations of the generalized arterial disease in T2D, DNA microarrays were applied to examine gene expression changes in normal-appearing, non-atherosclerotic arterial tissue from 10 diabetic and 11 age-matched non-diabetic men scheduled for a coronary by-pass operation. Gene expression changes were integrated with GO-Elite, GSEA, and Cytoscape to identify significant biological pathways and networks.
Global pathway analysis revealed differential expression of gene-sets representing matrix metabolism, triglyceride synthesis, inflammation, insulin signaling, and apoptosis. The network analysis showed a significant cluster of dysregulated genes coding for both intra- and extra-cellular proteins associated with vascular cell functions together with genes related to insulin signaling and matrix remodeling.
Our results identify pathways and networks involved in the diffuse vasculopathy present in non-atherosclerotic arterial tissue in patients with T2D and confirmed previously observed mRNA-alterations. These abnormalities may play a role for the arterial response to injury and putatively for the accelerated atherogenesis among patients with diabetes.
Authors’ original file for figure 112933_2011_452_MOESM1_ESM.jpeg
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- Global gene expression profiling displays a network of dysregulated genes in non-atherosclerotic arterial tissue from patients with type 2 diabetes
Maria L Hansen
Lars M Rasmussen
- BioMed Central
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