(Beijing, China) and randomly divided into 5 groups (the control group, LPS group, LPS +
12.5 mg/kg OMT group, LPS + 25 mg/kg OMT group, and LPS + 50 mg/kg OMT group) (18
mice/group). After anesthetization, the mice in the LPS group were intratracheally
administered 50 µg LPS from P. aeruginosa serotype 10
(product no.: L9143) (Sigma-Aldrich Corp., St. Louis, MO, USA) in 70 µl
PBS to establish the ALI model. The mice in the control group received the same volume of
PBS in the same way as described above. The mice in the LPS + OMT groups were
intraperitoneally injected with 12.5, 25, or 50 mg/kg OMT (Meilunbio, Dalian, China) 30
min before LPS administration. Meanwhile, the mice in the control group and the LPS group
were pretreated with an equal volume of sterile saline.