To further elucidate whether the inhibitory effect of P4/Org toward the proliferation of lung adenocarcinoma cells was mediated by mPRα, we treated PC‐9‐mPRα− and PC‐9 cells with 20 μM P4/Org for 24, 48 and 72 hours, and then evaluated them by the CCK‐8 assay. The gene discussed is PAQR7; the disease is lung adenocarcinoma.