Effects of CA and CA-AuNPs on iNOS, NF-κB, HO-1 and Kim-1 mRNA expressions. CA and CA-AuNPs attenuates mRNA expression of iNOS (A) and NF-κB (B) while both increases the mRNA expression of HO-1 (c) and Kim-1 (d) (***p < 0.001, **p < 0.01, * p < 0.05).