Nardostachin from Nardostachys jatamansi exerts anti‑neuroinflammatory effects through TLR4/MyD88‑related suppression of the NF‑κB and JNK MAPK signaling pathways in lipopolysaccharide‑induced BV2 and primary microglial cells.

Abstract:

:Through searching for anti‑neuroinflammatory metabolites from Nardostachys jatamansi extracts, nardostachin was revealed to exert anti‑neuroinflammatory effects against lipopolysaccharide (LPS)‑induced overproduction of nitric oxide and prostaglandin E2 in BV2 and rat primary microglial cells. Furthermore, nardostachin inhibited the production of inducible nitric oxide synthase and cyclooxygenase‑2 as well as pro‑inflammatory cytokines, including interleukin (IL)‑1β, IL‑6, IL‑12 and tumor necrosis factor‑α in LPS‑stimulated BV2 and rat primary microglial cells. In a mechanistic study, nardostachin exhibited inhibitory activity on the nuclear factor (NF)‑κB signaling pathway in LPS‑stimulated BV2 and rat primary microglial cells by repressing IκB‑α phosphorylation and blocking NF‑κB translocation. Furthermore, nardostachin exhibited inhibitory effects on LPS‑induced phosphorylation of c‑Jun N‑terminal kinase (JNK) mitogen‑activated protein kinase (MAPK). Additionally, nardostachin repressed protein expression of Toll‑like receptor 4 (TLR4) and myeloid differentiation factor 88 (MyD88) in LPS‑induced BV2 and rat primary microglial cells. These results suggested that nardostachin exerts anti‑neuroinflammatory effects on LPS‑induced BV2 and rat primary microglial cells by suppressing the TLR4‑MyD88‑NF‑κB and JNK MAPK pathways.

journal_name

Mol Med Rep

authors

Kim DC,Park JS,Yoon CS,Kim YC,Oh H

doi

10.3892/mmr.2020.11720

subject

Has Abstract

pub_date

2021-01-01 00:00:00

issue

1

eissn

1791-2997

issn

1791-3004

pii

82

journal_volume

23

pub_type

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