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Fibroblast growth factor 21 (FGF21) is a newly discovered adipokine, synthesized by several organs, mostly by the liver, which was introduced as a potent metabolic regulator and insulin-sensitizing factor. Numerous animal studies have demonstrated that FGF21 improves glucose and lipids metabolism and exerts anti-inflammatory effects. However, data obtained from human studies have shown contradictory results, in which circulating FGF21 levels were often elevated in obesity, dyslipidemia, type 2 diabetes (DM2) and other conditions connected with insulin resistance. This increase in basal FGF21 concentrations observed in patients with obesity and other conditions related to insulin resistance was being explained as a compensatory response to the underlying metabolic disturbances or tissue resistance to FGF21 action. Furthermore, the results of clinical trials have shown that increased FGF21 concentrations were associated with increased cardiovascular (CV) risk and had a prognostic value in CV outcomes. In recent years, it has been reported that FGF21 may exert cardioprotective effects. This mini-review aims to summarize the current state of knowledge about the role of FGF21 in CV disorders, and discuss the molecular mechanism underlying the anti-atherogenic properties of this compound.

Fibroblast growth factor 21 – a key player in cardiovascular disorders?