ER stress is involved in PA-induced LOX-1 upregulation. (a) The protein expression levels of Bip, CHOP, and LOX-1 were measured by Western blotting. (b) The expression levels of Bip, CHOP, and LOX-1 were quantified via densitometry using ImageJ software (n = 3; 1-way ANOVA with Duncan's posthoc test). (c) The protein expression levels of Bip, CHOP, and LOX-1 were measured by Western blotting. The expression levels of Bip (d), CHOP (e), and LOX-1 (f) were quantified via densitometry using ImageJ software (n = 4; 1-way ANOVA with Duncan's posthoc test). The data are shown as means ± SD (∗∗∗P < 0.001, ∗∗P < 0.01 vs. the Cont group;##P < 0.01, #P < 0.05 vs. the PA group).