Table 3.
Important liable mechanisms for metabolic syndrome related to cardiovascular diseases
Hypertension | Dyslipidemia | Proinflammatory cytokines | Insulin resistance | Microalbuminuria |
---|---|---|---|---|
Insulin resistance stimulates sympathetic nervous system | Enhancement of lipolysis in adipocytes | Elevation of plasma concentrations of IL-6, TNF-α, C-reactive protein, and resistin | Overabundance of circulating fatty acids by lipolysing of triacylglycerol by insulin | Glomerular hyperfiltration |
Insulin resistance mediates hyperadrenergic state | Insulin drives lipogenesis in the liver | Reduction of anti-inflammatory adipokines such as adiponectin | Inhibition of antilipolytic effect of insulin by circulating fatty acids | Over-production of ROS |
Insulin resistance stimulates renal sodium absorption | Increase CETP activity and lipolysis of HDL-c | Impairment activation of protein kinase Ce-_ and protein kinase C-by Fatty acids | Insulin resistance, inflammation and altered renal hemodynamics | |
Insulin can cause upregulation of angiotensin II type I receptors | Enhancement of triglyceride synthesis in the liver | Defect in insulin stimulated IRS-1 and IRS-2 tyrosine phosphorylation | ||
Low levels of plasma natriuretic peptides | Activation of protein kinase Ce-_ and c-Jun N-terminal kinase-1.41 | |||
Insulin resistance increases endothelin 1impairment of NO-mediated vasodilation | Fatty acids increase hepatic glucose production and diminish inhibition of glucose production by insulin | |||
Hyperuricemia | Defect in mitochondrial oxidative phosphorylation | |||
Production of endogenous digoxin-like factor | Deficient in the endoplasmic reticulum X-box binding protein-1, hyperactivation of c-Jun N-terminal kinase-1 increases serine phosphorylation of IRS-1 |
NO: nitric oxide, CETP: cholesteryl ester transfer protein, HDL-c: high density lipoprotein cholesterol, IL-6: interlukin 6, TNF-α: tumor necrosis factor α, ROS: reactive oxygen species, IRS: insulin receptor substrate