Zhenlie HUANG, et al.: Higher Calprotectin and Lower RBP4 in THD Workers than trichloroethylene exposure. Conclusions: The pathophysiological processes underlying THD may involve elevated inflammatory responses and oxidative stress, inhibition of vitamin transport, depression of fatty acid biosynthesis, loss of extracellular actin scavenger, increase in oxygen transport, dysfunction in lipid transport, proteolysis and glycolysis. The combination of higher calprotectin and lower RBP4 levels in the serum could be used as potential biomarkers of THD. (J Occup Health 2012; 54: 299-309)