Effects of SHO and GIN on inflammatory cytokines levels in lung tissues. Levels of Th2 cell-related inflammatory cytokines in lung tissues. Total RNA was isolated from lung tissues. (A) IL-4, (B) IL-5 and (C) IL-6 mRNA expression levels were detected using reverse transcription-quantitative PCR with specific primers. The relative mRNA expression levels were calculated based on β-actin mRNA expression in lung tissues. (D) Protein expression levels of cytokines were determined via western blotting, and (E) IL-4, (F) IL-5 and (G) IL-6 protein expression levels were semi-quantified. Values are presented as mean ± SD (n=6). #P<0.05, ##P<0.01, ###P<0.001 vs. control group; *P<0.05, **P<0.01, ***P<0.001 vs. OVA group. OVA, ovalbumin; SHO, 6-shogaol; GIN, 6-gingerol.