From infancy to aging: Biological and behavioral modifiers of Fetuin-A.

Fetuin-A is a multifunctional protein which inhibits ectopic calcification and insulin receptor phosphorylation. It may also promote insulin resistance by activation of toll-like receptor 4 pro-inflammatory cascade. Increased levels of Fetuin-A have been associated with obesity and related comorbidities such as type 2 diabetes and cardiovascular disease, therefore, it has been suggested as a potential therapeutic target for intervention. However, in addition to its role in disease pathophysiology, Fetuin-A is also important for growth and development. Thus, before evaluating Fetuin-A as a biomarker or pharmacological target, an understanding of Fetuin-A variability throughout the life cycle is essential. This manuscript reviews the current body of knowledge surrounding Fetuin-A throughout the life cycle and discuss challenges to studying Fetuin-A.