miR-130b participates in wear particle-induced inflammation and osteolysis via FOXF2/NF-κB pathway

Area of Science:

• Biomedical Engineering
• Molecular Biology
• Immunology

Background:

• Periprosthetic osteolysis is a significant complication of artificial joint replacements.
• Wear particles generated from implants trigger inflammatory responses and bone resorption.
• Understanding the molecular mechanisms underlying particle-induced osteolysis is crucial for developing effective treatments.

Purpose of the Study:

• To elucidate the signaling pathway mediated by microRNA-130b (miR-130b) in wear particle-induced inflammation and osteolysis.
• To investigate the regulatory role of miR-130b on forkhead box F2 (FOXF2) and its downstream effects on the nuclear factor-kappa B (NF-κB) pathway.

Main Methods:

• Established a particle-induced osteolysis (PIO) mouse model.
• Quantified inflammatory cytokine levels (TNF-α, IL-1β, IL-6, IL-10) using ELISA.
• Measured miR-130b and FOXF2 mRNA expression via qRT-PCR.
• Assessed protein levels of FOXF2, p-p65, and p-IκB using Western blot.
• Confirmed miR-130b regulation of FOXF2 using a luciferase reporter assay.

Main Results:

• PIO mice exhibited elevated TNF-α, IL-1β, IL-6, miR-130b, and p-p65, with decreased IL-10 and FOXF2.
• miR-130b inhibition reduced pro-inflammatory cytokines and increased IL-10 in vitro.
• FOXF2 was identified as a direct target of miR-130b; FOXF2 knockdown mimicked the pro-inflammatory effects.
• NF-κB inhibition further modulated cytokine profiles, confirming pathway involvement.

Conclusions:

• The miR-130b/FOXF2/NF-κB signaling pathway plays a critical role in wear particle-induced osteolysis.
• This pathway represents a novel therapeutic target for treating periprosthetic osteolysis.
• Findings provide new insights into the molecular pathogenesis of osteolysis.