The expression of PPARβ/δ in human non-small cell lung cancer tissue is significantly higher than that in normal lung tissue, and the activation of PPARβ/δ can promote the proliferation and viability of lung cancer cell lines, whereas the interference of PPARβ/δ expression can increase the apoptosis of cancer cells14,15. The gene discussed is PPARD; the disease is non-small cell lung carcinoma.