To explore the effect and molecular mechanism of total flavonoids Astragalus on apoptosis inflammation alveolar epithelial cells induced by tumor necrosis factor alpha. Human were divided into control group, alpha alpha+trifluoroacetic acid-low, acid-medium, acid-high alpha+anti-microRNA-NC alpha+microRNA-221 inhibitor acid-high+microRNA-NC acid-H+microRNA-221 mimic group. Real-time fluorescenc...