Plasma Retinol-Binding Protein-4 Concentrations Are Elevated in Human Subjects With Impaired Glucose Tolerance and Type 2 Diabetes

Gavi et al. (1) investigated the association between visceral adipose tissue (VAT) mass by computed tomography and circulating retinol-binding protein-4 (RBP4) concentrations in nondiabetic subjects. They could not find a correlation between VAT and serum RBP4 concentrations, while VAT was inversely correlated with serum adiponectin concentrations in their subjects. The study by Gavi et al. did not support specific association between circulating …