Schisandrin A restrains osteoclastogenesis by inhibiting reactive oxygen species and activating Nrf2 signalling.

Abstract:

OBJECTIVES:Intracellular reactive oxygen species (ROS) induced by receptor activator of NF-kB ligand (RANKL) has been proven to be a critical factor in the development of osteoclasts. This study aimed to prove that schisandrin A (Sch), a novel anti-oxidant compound, is able to suppress osteoclastogenesis and prevent bone loss in ovariectomized (OVX) mice by suppressing ROS via nuclear factor erythroid 2-related factor (Nrf2). MATERIAL AND METHODS:Micro-CT was used to detect bone formation. The effects of Sch on receptor activator of nuclear factor-κB (NF-κB) ligand (RANKL)-induced reactive oxygen species (ROS) were measured by dihydroethidium (DHE) staining in vivo and 2',7'-dichlorodihydrofluorescein diacetate (DCFH-DA) staining in vitro. Immunofluorescence staining was used to detect the expression of Nrf2 in vivo. siRNA was used to evaluate the effect of Nrf2 in osteoclastogenesis. RESULTS:Sch suppresses RANKL-induced ROS production by regulating nuclear factor erythroid 2-related factor (Nrf2) in vitro and vivo. Mechanistically, Sch enhances the expression of Nrf2 by regulating the degradation of Nrf2. Further, Sch suppresses phosphorylation of P65 and its nuclear translocation, as well as the degradation of IκBα. Collectively, our findings reveal that Sch protects against OVX-induced bone loss by suppressing ROS via Nrf2. CONCLUSIONS:Our results showed the potential of anti-oxidant compound schisandrin A in the treatment of osteoporosis, highlighting Nrf2 as a novel promising target in osteoclast-related disease.

journal_name

Cell Prolif

journal_title

Cell proliferation

authors

Ni S,Qian Z,Yuan Y,Li D,Zhong Z,Ghorbani F,Zhang X,Zhang F,Zhang Z,Liu Z,Yu B

doi

10.1111/cpr.12882

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

e12882

issue

10

eissn

0960-7722

issn

1365-2184

journal_volume

53

pub_type

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