Journal of Nanobiotechnology (Nov 2021)

Integrated endotoxin-adsorption and antibacterial properties of platelet-membrane-coated copper silicate hollow microspheres for wound healing

  • Zaihui Peng,
  • Xiaochun Zhang,
  • Long Yuan,
  • Ting Li,
  • Yajie Chen,
  • Hao Tian,
  • Dandan Ma,
  • Jun Deng,
  • Xiaowei Qi,
  • Xuntao Yin

DOI
https://doi.org/10.1186/s12951-021-01130-w
Journal volume & issue
Vol. 19, no. 1
pp. 1 – 17

Abstract

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Abstract Serious infection caused by drug-resistant gram-negative bacteria and their secreted toxins (e.g., lipopolysaccharide) is a serious threat to human health. Thus, treatment strategies that efficiently kill bacteria and reducing the impact of their toxins simultaneously are urgently required. Herein, a novel antibacterial platform composed of a mesoporous copper silicate microsphere (CSO) core and a platelet membrane (PM) shell was prepared (CSO@PM). CSO@PM specifically targets bacteria owing to formyl peptide receptors on the PM and, combined with photothermal therapy (PTT), exhibits highly effective bacter icidal activity. Importantly, CSO@PM can adsorb lipopolysaccharide secreted by gram-negative bacteria, resulting in inflammation reduction. Thus, CSO@PM stimulates re-epithelialization and granulation-tissue formation, promoting wound healing. Moreover, this antibacterial platform exhibits no obvious toxicity at all the test concentrations in vitro and in vivo. Thus, CSO@PM exhibits a robust antibacterial effect and a strong toxin-adsorption capacity, facilitating the clinical treatment of many bacterial infections and the development of next-generation antibacterial nanoagents. Graphical Abstract

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