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The euglycemic-hyperinsulinemic clamp (EHC) is not available in most clinical settings and is costly, time consuming and invasive, and requires trained staff. Therefore, an accessible and inexpensive test to identify insulin resistance (IR) is needed. The aim of this study is to assess whether zinc-α2-glycoprotein (ZAG) index [Ln ZAG/homeostasis model assessment of IR (HOMA-IR)] is a better surrogate...
High-fat diet (HFD) is associated with insulin resistance, hyperinsulinemia, elevated plasma free fatty acid (FFA), and increased risk for atherosclerotic vascular disease. However, the mechanisms underlying the HFD-induced insulin resistance have not been fully clarified. The aim of present study is to evaluate the effects of long-term HFD on the regulation of the insulin-sensitizing fibroblast growth...
Fibroblast growth factor 21 (FGF-21) has been identified as a potent metabolic regulator. Despite the importance of FGF-21 in the regulation of glucose, lipid and energy homeostasis, much less is known about the effect of common anti-diabetic treatment on the plasma levels of FGF-21. The aim of our study was to measure its plasma levels in patients with new-onset type 2 diabetes mellitus (nT2DM) and...
Vaspin has been regarded as a novel adipokine with potential insulin sensitizing properties. The aim of the present study is to investigate the effects of rosiglitazone therapy on plasma vaspin in type 2 diabetes patients (T2DM) inadequately controlled on metformin alone. A total of 105 subjects, including 37 subjects with normal glucose tolerance (NGT), 37 subjects with impaired glucose regulating...
Inflammatory cytokines have been linked to obesity-related insulin resistance. To investigate the effect of TNF-α, an inflammatory cytokine, on insulin action, C57BL/6J mice were treated with TNF-α for 7 days after which we examined the in vivo effects of TNF-α on glucose tolerance and insulin sensitivity with IV glucose tolerance tests and hyperinsulinemic-euglycemic clamps. In addition, we analyzed...
Cytokine induced gene expression is mediated through the ligand-dependent activation of the janus kinase (jak)/signal transducer and activator of transcription (STAT) signal transduction pathway. The ubiquitin proteasome pathway functions in the controlled degradation of cellular proteins, and regulates cytokine signal transduction through the degradation of specific signaling components. Interferon...
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