Issue 25, 2022

Au nanocluster-modulated macrophage polarization and synoviocyte apoptosis for enhanced rheumatoid arthritis treatment

Abstract

The persistent progression of synovial inflammation and cartilage destruction contributes to the crosstalk between pro-inflammatory macrophages and activated fibroblast-like synoviocytes (FLSs) in a synovial microenvironment. In this work, structurally well-defined Au25 nanoclusters were synthesized to induce phenotypic polarization of pro-inflammatory macrophages and apoptosis of activated FLSs for enhanced rheumatoid arthritis treatment. These ultra-small nanoclusters significantly modulated phenotypic polarization of a pro-inflammatory M1 phenotype to an anti-inflammatory phenotype M2 for relieving inflammation. Additionally, Au25 nanoclusters can efficiently activate reactive oxygen species (ROS)-mediated apoptotic signaling pathways by inactivating thioredoxin reductase (TrxR), resulting in imbalance of the cellular redox homeostasis and initiation of FLS apoptosis. In an adjuvant-induced arthritis rat model, Au25 nanoclusters efficiently ameliorated the hyperplasia of the synovium and reduced inflammatory cell infiltration with negligible side effects. This study provided a new insight into Au nanoclusters for treating rheumatoid arthritis.

Graphical abstract: Au nanocluster-modulated macrophage polarization and synoviocyte apoptosis for enhanced rheumatoid arthritis treatment

Supplementary files

Article information

Article type
Paper
Submitted
21 Apr. 2022
Accepted
28 Maijs 2022
First published
30 Maijs 2022

J. Mater. Chem. B, 2022,10, 4789-4799

Au nanocluster-modulated macrophage polarization and synoviocyte apoptosis for enhanced rheumatoid arthritis treatment

H. Chen, Y. Jiang, T. Xu, J. Xu, J. Yu, Z. Chu, Y. Jiang, Y. Song, H. Wang and H. Qian, J. Mater. Chem. B, 2022, 10, 4789 DOI: 10.1039/D2TB00869F

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