Nevertheless, pretreatment by catechins significantly depressed the levels of neutrophils and ROS in the BALF and plasma levels of IL-2 and IFN-γ (p < 0.05), and the inhibitory effects of catechins on these inflammatory factors were reversed by 3-MA in LPS-induced ALI model (p < 0.05) (Figure 8B–E). Here, IL2 is linked to acute respiratory distress syndrome.