Chinese Journal of Tissue Engineering Research ›› 2021, Vol. 25 ›› Issue (31): 5012-5017.doi: 10.12307/2021.144

Previous Articles     Next Articles

Fasudil inhibits lipopolysaccharide-induced astrocytic injury by regulating Nrf2/HO-1 signaling pathway

Guo Minfang1, Zhang Huiyu1, Zhang Peijun1, Bai Zhenjun1, Yu Jingwen1, Wang Yuyin1, 2, Wei Wenyue1, 3, Song Lijuan2, 3, Chai Zhi2, Yu Jiezhong1, 4, Ma Cungen1, 2   

  • Received:2020-07-24 Revised:2020-07-25 Accepted:2020-08-19 Online:2021-11-08 Published:2021-04-25
  • Contact: Ma Cungen, MD, Professor, Doctoral supervisor, Institute of Brain Science, Shanxi Datong University/Key Laboratory of Shanxi Province for Basic and Applied Research on Neuroinflammation and Degenerative Diseases, Datong 037009, Shanxi Province, China; Key Laboratory of Multiple Sclerosis, Nourishing Qi and Activating Blood, National Administration of Traditional Chinese Medicine/Neurobiology Research Center, Shanxi University of Chinese Medicine, Jinzhong 030619, Shanxi Province, China
  • About author:Guo Minfang, Master, Associate professor, Institute of Brain Science, Shanxi Datong University/Key Laboratory of Shanxi Province for Basic and Applied Research on Neuroinflammation and Degenerative Diseases, Datong 037009, Shanxi Province, China
  • Supported by:
    the Shanxi Province Platform Base Special Project, No. 201805D111009 (to MCG), No. 201805D131005 (to YJZ); the Science and Technology Innovation Project of Shanxi Colleges and Universities, No. 2020L0484 (to GMF); the Opening Project of Key Laboratory of Shanxi Province for Basic and Applied Research on Neuroinflammation and Degenerative Diseases, No. KF2019007 (to GMF) 

Abstract: BACKGROUND: More and more evidences show that ROCK signaling pathway is involved in inflammation and oxidative stress. Fasudil is an effective Rho kinase inhibitor. Our previous series of studies have proved that fasudil has neuroprotective effects. However, it is still unclear that whether fasudil has protective effect on oxidative damage to astrocytes and its possible mechanisms.
OBJECTIVE: To explore the protective effect and mechanism of fasudil on lipopolysaccharide-induced oxidative injury in astrocytes.
METHODS: Primary C57BL/6 mouse astrocytes were cultured and divided into PBS control group, lipopolysaccharide stimulation group (1 mg/L), lipopolysaccharide (1 mg/L) combined with fasudil (15 mg/L) treatment group. After 24 hours of treatment, MTT assay was used to detect the viability of astrocytes. The content of malondialdehyde and the activity of superoxide dismutase in astrocytes were measured using the kit to evaluate the level of oxidative stress. Immunofluorescence staining was used to detect the expression of cleaved-caspase-3, the nuclear translocation of nuclear factor erythroid 2-related factor 2 (Nrf2) and the expression of heme oxygenase-1 (HO-1) in astrocytes. Western blot assay was used to detect the total Nrf2, nuclear Nrf2 and HO-1 protein levels.  
RESULTS AND CONCLUSION: (1) Compared with the PBS control group, the astrocyte viability in the lipopolysaccharide stimulation group was reduced, and fasudil treatment improved the cell damage induced by lipopolysaccharide. (2) Compared with the PBS control group, lipopolysaccharide resulted in a significant decrease in the activity of superoxide dismutase and a significant increase in the level of malondialdehyde in astrocytes (P < 0.01). Fasudil significantly increased the activity of superoxide dismutase (P < 0.01) and reduced the level of malondialdehyde (P < 0.01). (3) Compared with the PBS control group, the expression of cleaved-caspase-3 was significantly increased in the lipopolysaccharide stimulation group. Compared with the lipopolysaccharide stimulation group, the expression of cleaved-caspase-3 was decreased in the lipopolysaccharide combined with fasudil treatment group. (4) Fasudil could promote the nuclear translocation of Nrf2 and significantly increase the expression of total Nrf2, nucleus Nrf2 and HO-1 after lipopolysaccharide stimulation. (5) The results indicate that fasudil can inhibit lipopolysaccharide-induced astrocytic injury by regulating the Nrf2/HO-1 signaling pathway.

Key words: astrocyte, lipopolysaccharide, fasudil, nuclear factor erythroid 2-related factor 2, oxidative stress, apoptosis, experiment 

CLC Number: