Cibotii Rhizoma Extract Mitigates LPS-Induced Inflammatory Bone Loss by Inhibiting the RANK Signaling Pathway to Suppress Osteoclastogenesis and Bone Resorption.
Level 5 - mechanism / opinion, no new human data
Preclinical in vitro and animal model (Level 5 mechanism-based research)
PubMed 42076885 · doi:10.1002/adbi.202500599
What was done
Researchers evaluated the protective effects and molecular mechanisms of Cibotii Rhizoma (CR) extract against inflammatory bone loss. In vitro, mouse bone marrow-derived monocyte/macrophage cultures were treated with CR during RANKL stimulation to assess osteoclastogenesis, podosomal actin ring assembly, cell fusion, and expression of downstream mediators (NFATc1, c-Src, TRAF6). In vivo, mice with LPS-induced calvarial bone loss received CR, followed by micro-CT, histological analysis, and immunohistochemical staining for RANK and NFATc1.
What was found
In cell culture, CR extract suppressed RANKL-induced osteoclast formation, podosomal actin ring assembly, and cell fusion while downregulating NFATc1, c-Src, and TRAF6. In the mouse model, CR preserved bone microarchitecture, reduced osteoclast numbers and calvarial bone erosion, and decreased tissue levels of RANK and NFATc1. No quantitative effect sizes, doses, or statistical values were reported in the abstract.
Why it matters
This study outlines a mechanistic pathway through which Cibotii Rhizoma extract curbs osteoclast differentiation and inflammatory bone resorption in preclinical models, suggesting potential therapeutic targets for inflammatory bone disease.
Limits
The study is limited to in vitro cell culture and an acute rodent model, providing no human clinical data. The abstract omits sample size (n), extract dosage, preparation standardization, active constituents, and numerical outcome data. Long-term safety, toxicity, and direct effects on osteoblast activity were not reported.
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