Overwhelming and persistent inflammation of retinal pigment epithelium (RPE) induces destructive changes in retinal environment by invoking immune activation. In this study, we aimed to investigate RPE-specific biological and metabolic response against intense inflammation, and identify molecular characteristics determining pathological progression. Here, we performed quantitative analyses of proteome and phosphoproteome of lipopolysaccharide (LPS)-stimulated human derived RPE cell line ARPE-19 using the latest isobaric TMT labeling approach coupled with high-resolution mass spectrometry.