Sangxingtang inhibits the inflammation of LPS-induced acute lung injury in mice by down-regulating the MAPK/NF-κB pathway / 中国天然药物

In the present study, we investigated anti-inflammatory effects of Sangxingtang (SXT) on acute lung injury using a lipopolysaccharide (LPS)-induced acute lung injury (ALI) mouse model. The cell counting in the bronchoalveolar lavage fluid (BALF) was performed. The degree of lung edema was evaluated by measuring the wet/dry weight (W/D) ratio. The superoxidase dismutase (SOD) and myeloperoxidase (MPO) activities were assayed by SOD and MPO kits, respectively. The levels of inflammatory mediators, including tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6), were assayed by the enzyme-linked immunosorbent assay methods. Pathological changes of lung tissues were observed by Hematoxylin and eosin (HE) staining. The inflammatory signaling pathway-related proteins nuclear factor mitogen activated protein kinases (P38MAPK), extracellular regulated protein kinases (Erk), c-Jun N-terminal kinase (Jnk) and nuclear transcription factor (NF-κB) p65 expressions were measured by Western blotting. Our results showed that the treatment with the SXT markedly attenuated the inflammatory cell numbers in the BALF, decreased the levels of P-P38MAPK, P-Erk, P-Jnk and P-NF-κB p65 and the total protein levels in lungs, improved the SOD activity and inhibited the MPO activity. Histological studies demonstrated that SXT substantially reduced the LPS-induced neutrophils in lung tissues, compared with the untreated LPS group. In conclusion, our results indicated that SXT had protective effects on LPS-induced ALI in mice.

Tectorigenin inhibits the inflammation of LPS-induced acute lung injury in mice / 中国天然药物

AIM@#In a previous study, the anti-inflammatory effects of tectorigenin were disclosed. In this study, the anti-inflammatory effects of tectorigenin on acute lung injury using a lipopolysaccharide (LPS)-induced acute lung injury (ALI) mouse model were investigated@*METHOD@#The cell-count in the bronchoalveolar lavage fluid (BALF) was measured. The animal lung edema degree was evaluated by the wet/dry weight (W/D) ratio. The superoxidase dismutase (SOD) activity and myeloperoxidase (MPO) activity was assayed using SOD and MPO kits, respectively. The levels of inflammatory mediators, including tumor necrosis factor-α (TNF-α), IL-1β, and IL-6 were assayed using an enzyme-linked immunosorbent assay method. Pathological changes of lung tissues were observed through HE staining. The inflammatory signal pathway related protein nuclear factor NF-κB p65 mRNA expression was measured by real-time PCR, and the protein level of NF-κB p65 was measured using Western blotting analysis.@*RESULTS@#The data showed that treatment with the tectorigenin markedly attenuated the inflammatory cell numbers in the BALF, decreased nuclear factor NF-κB p65 mRNA level and protein level in the lungs, and improved SOD activity and inhibited MPO activity. Histological studies showed that tectorigenin substantially inhibited LPS-induced neutrophils in lung tissue compared with the model group.@*CONCLUSION@#The results indicated that tectorigenin had a protective effect on LPS-induced ALI in mice.