Relationship between insulin sensitivity and gene expression in human skeletal muscle

The aim of this study was therefore to investigate molecular mechanisms associated with insulin sensitivity in skeletal muscle by relating global skeletal muscle gene expression with a surrogate measure of insulin sensitivity, i.e. homeostatic model assessment of insulin resistance (HOMA-IR). To identify genes with skeletal muscle expression related to insulin sensitivity, we obtained muscle biopsies from 38 non-diabetic participants in study A. We then profiled muscle gene expression using Affymetrix oligonucleotide microarrays (Affymetrix Custom Array NuGO-Hs1a520180 GeneChip). To replicate the findings from study A, we included 9 non-diabetic participants from study B. We performed skeletal muscle gene expression profiling from these participants using the Agilent oligonucleotide microarrays (Agilent-G4112F (Feature Number version)). Insulin sensitivity was estimated using the 1/HOMA-IR method calculated from the oral glucose tolerance test (OGTT) values. This SuperSeries is composed of the SubSeries listed below. The aim of this study was therefore to investigate molecular mechanisms associated with insulin sensitivity in skeletal muscle by relating global skeletal muscle gene expression with a surrogate measure of insulin sensitivity, i.e. homeostatic model assessment of insulin resistance (HOMA-IR). Refer to individual Series