Transcriptome and Proteome Expressions Involved in Insulin Resistance in Muscle and Activated T-Lymphocytes of Patients with Type 2 Diabetes
- Author:
Stentz B. FRANKIE
1
;
Kitabchi E. ABBAS
Author Information
1. Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, The University of Tennessee Health Science Center, Memphis, TN 38163, USA
- Keywords:
genomics;
proteomics;
T-lymphocytes;
activation;
muscle;
Type 2 diabetes
- From:
Genomics, Proteomics & Bioinformatics
2007;2(3):216-235
- CountryChina
- Language:Chinese
-
Abstract:
We analyzed the genes expressed (transcriptomes) and the proteins translated (pro- teomes) in muscle tissues and activated CD4+ and CD8+ T-lymphocytes (T-cells) of five Type 2 diabetes (T2DM) subjects using Affymetrix microarrays and mass spectrometry, and compared them with matched non-diabetic controls. Gene ex- pressions of insulin receptor (INSR), vitamin D receptor, insulin degrading enzyme, Akt, insulin receptor substrate-1 (IRS-1), IRS-2, glucose transporter 4 (GLUT4), and enzymes of the glycolytic pathway were decreased at least 50% in T2DM than in controls. However, there was greater than two-fold gene upregulation of plasma cell glycoprotein-1, tumor necrosis factor α (TNFα), and gluconeogenic enzymes in T2DM than in controls. The gene silencing for INSR or TNFα resulted in the inhibition or stimulation of GLUT4, respectively. Proteome profiles correspond- ing to molecular weights of the above translated transcriptomes showed different patterns of changes between T2DM and controls. Meanwhile, changes in tran- scriptomes and proteomes between muscle and activated T-cells of T2DM were comparable. Activated T-cells, analogous to muscle cells, expressed insulin sig- naling and glucose metabolism genes and gene products. In conclusion, T-cells and muscle in T2DM exhibited differences in expression of certain genes and gene products relative to non-diabetic controls. These alterations in transcriptomes and proteomes in T2DM may be involved in insulin resistance.
