HMOX1 and Ito hypomelanosis: The immunostained lung sections demonstrated that the expression of NF-κB p65 and HO-1 in the 6 mg/kg bw-ITO, 6 mg/kg bw-In2O3, 2.614 mg/kg bw-In2(SO4)3, and 1.3 mg/kg bw-InCl3 groups were statistically significant higher than that in the control group; the most significant immunoreaction of NF-κB p65 was observed in ITO and In2O3 groups, while the most significant immunoreaction of HO-1 was observed in In2(SO4)3 and InCl3 groups.