C1QTNF9 and metabolic syndrome: Results of clinical analyses revealed that serum CTRP9 concentration was positively correlated with a favorable glucose metabolic phenotype and the loss of metabolic syndrome, while it was negatively correlated with age, blood pressure, fasting blood glucose levels, IR homeostasis model evaluation, total cholesterol, triglyceride, and low density lipoprotein cholesterol (LDL-C) (Hwang et al., 2014).