AuAg nanocomposites suppress biofilm-induced inflammation in human osteoblasts

Chiang Wen Lee, Zih Chan Lin, Yao Chang Chiang, Sin Yu Li, Jyun Jia Ciou, Kuan Wen Liu, Yu Ching Lin, Bo Jie Huang, Kuo Ti Peng, Mei Ling Fang, Tzu En Lin, Mei Yi Liao, Chian Hui Lai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Staphylococcus aureus (S. aureus) forms biofilm that causes periprosthetic joint infections and osteomyelitis (OM) which are the intractable health problems in clinics. The silver-containing nanoparticles (AgNPs) are antibacterial nanomaterials with less cytotoxicity than the classic Ag compounds. Likewise, gold nanoparticles (AuNPs) have also been demonstrated as excellent nanomaterials for medical applications. Previous studies have showed that both AgNPs and AuNPs have anti-microbial or anti-inflammatory properties. We have developed a novel green chemistry that could generate the AuAg nanocomposites, through the reduction of tannic acid (TNA). The bioactivity of the nanocomposites was investigated in S. aureus biofilm-exposed human osteoblast cells (hFOB1.19). The current synthesis method is a simple, low-cost, eco-friendly, and green chemistry approach. Our results showed that the AuAg nanocomposites were biocompatible with low cell toxicity, and did not induce cell apoptosis nor necrosis in hFOB1.19 cells. Moreover, AuAg nanocomposites could effectively inhibited the accumulation of reactive oxygen species (ROS) in mitochondria and in rest of cellular compartments after exposing to bacterial biofilm (by reducing 0.78, 0.77-fold in the cell and mitochondria, respectively). AuAg nanocomposites also suppressed ROS-triggered inflammatory protein expression via MAPKs and Akt pathways. The current data suggest that AuAg nanocomposites have the potential to be a good therapeutic agent in treating inflammation in bacteria-infected bone diseases.

Original languageEnglish
Article number165101
Issue number16
StatePublished - 16 Apr 2023


  • AuAg nanocomposites
  • biofilm-induced diseases
  • eco-friendly green chemistry
  • inflammation
  • osteoblast
  • reactive oxygen species


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