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Quercetin-Loaded Ceria Nanocomposite Potentiate Dual-Directional Immunoregulation via Macrophage Polarization against Periodontal Inflammation. | LitMetric

AI Article Synopsis

  • The polarization of macrophages to the M1 phenotype is linked to the aggressive phase of periodontal inflammation, while the M2 phenotype is associated with tissue repair and anti-inflammation.
  • Nanoceria has been shown to inhibit M1 polarization, but its effects on promoting M2 polarization are limited; however, combining it with quercetin enhances its ability to regulate macrophage behavior.
  • The resulting nanocomposite is effective in increasing the M2/M1 ratio of macrophages and reducing inflammation through cytokine modulation, making it a promising option for treating periodontal diseases.

Article Abstract

Macrophage polarization toward M1 phenotype (pro-inflammation) is closely associated with the destructive phase of periodontal inflammation. Nanoceria is verified to inhibit M1 polarization of macrophages by the favorable ability of reactive oxygen species (ROS) scavenging. However, the function of nanoceria on macrophage polarization toward M2 phenotype (anti-inflammation) in reparative phase of periodontal inflammation is quite limited. In this work, by introducing an antioxidant drug quercetin onto nano-octahedral ceria, synergistic and intense regulation of host immunity against periodontal disease is realized. Such nanocomposite can control the phenotypic switch of macrophages by not only inhibition of M1 polarization for suppressing the damage in the destructive phase but also promotion of M2 polarization for regenerating the surrounding tissues in reparative phase of periodontal disease. As-prepared nanocomposite can effectively increase the M2/M1 ratio of macrophage polarization in inflammatory cellular models by lipopolysaccharide stimulation. More importantly, the nanocomposite also exerts an improved therapeutic potential against local inflammation by significant downregulation of pro-inflammatory cytokines and upregulation of anti-inflammatory cytokines in an animal model with periodontal inflammation. Therefore, this newly developed nanomedicine is efficient in ROS scavenging and driving pro-inflammatory macrophages to the anti-inflammatory phenotype to eliminate inflammation, thereby providing a promising candidate for treating periodontal inflammation.

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Source
http://dx.doi.org/10.1002/smll.202101505DOI Listing

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