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1.
Article in Chinese | WPRIM | ID: wpr-802299

ABSTRACT

Objective:To explore the neuroprotective effect and mechanism of Buyang Huanwu Tang (BYHWT) on experimental autoimmune encephalomyelitis (EAE) at different stages. Method:The 36 female C57BL/6 mice were immunized subcutaneously with myelin oligodendrocyte glycoprotein peptides (MOG35-55),then randomly divided into 9, 17, 28 d EAE control group. Each BYHWT group was orally given drugs on the 3rd day after immunization (50 g·kg-1·d-1), and EAE control group was given the same volume of normal saline in the same way once a day for 9, 17 and 28 d after immunization. The effect of BYHWT on EAE mice was observed with internationally accepted clinical score. Brain and spinal cord specimens were collected at 9, 17 and 28 d after immunization. The neuroprotective effect of BYHWT was observed by hematoxylin-eosin(HE)staining and solid blue staining (LFB). The expressions of BDNF and GAP-43 in spinal cord and brain were detected by Western blot. Result:After treatment, BYHWT can significantly inhibit myelitis cell infiltration and alleviate myelin loss. Compared with EAE group, the expression of Nogo-A in the spinal cord of each BYHWT group was significantly down-regulated (PPPPConclusion:BYHWT can improve the local nerve growth microenvironment and promote the expression of NTFs, reduce the expressions of neuroinhibitory factors, and play a role in neuroprotection.

2.
Chinese Pharmacological Bulletin ; (12): 202-207, 2018.
Article in Chinese | WPRIM | ID: wpr-705018

ABSTRACT

Aim To investigate the expression of formyl peptide receptor-2 (FPR2) in lipopolysaccharide (LPS)-induced-BV-2 cells,and detect FPR2's influence on inflammatory response induced by LPS.Methods After 1 mg · L-1 LPS acting on BV-2 cells at 12 h,the extrinsic inflammatory model was established.We used the Western blot assay to test the levels of FPR2 protein.And the expressions of phosphorylated NF-κB,TNF-α and IL-1β were investigated when the LPS-induced-BV-2 was incubated with FPR2's agonist MMK-1 and antagonist Boc-2.Transwell assay was also used to detect the LPS-inducedBV-2 migration induced by MMK-1 and Boc-2.Resuits LPS up-regulated the expression of FPR2,and when its agonist was acted on LPS-induced-BV-2,the levels of phosphorylated NF-κB,TNF-α and IL-1β were significantly higher than those of LPS group.In addition,the chemotaxis of LPS-induced-BV-2 also increased by MMK-1.These effects were abolished by Boc-2.Conclusions LPS can increase the expression of FPR2 on BV-2 cells,and FPR2 enhances the inflammatory response induced by LPS.

3.
Acta Pharmaceutica Sinica ; (12): 244-248, 2018.
Article in Chinese | WPRIM | ID: wpr-779869

ABSTRACT

The effects of catechin on inflammatory response of BV-2 cells were investigated using the lipopolysaccharide (LPS) model. BV-2 cells were incubated with LPS (1 mg·L-1) for 12 h in the microglia inflammatory model in vitro. After catechin and LPS co-incubation for 12 h, MTT, ELISA and Western blot were used to detect cell viability, cytokines, cell migration and protein expression. In addition, transwell assay was conducted to investigate the effect of catechin on cell chemokaxis. Catechin did not show any cytotoxicity effect on BV-2 cells, but reversed the change in cell morphology and inhibited the release of TNF-α and IL-1β, cell chemotaxis and phosphorylation of NF-κB/p65. In conclusion, Catechin could inhibit the LPS-induced inflammatory response in BV-2 cells.

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