Journal
ACS NANO
Volume 16, Issue 11, Pages 18119-18132Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.2c04871
Keywords
gold nanoparticles; polymer-coating; in vivo toxicity; targeted delivery; B cells; age-associated B cells
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Funding
- Swiss National Science Foundation (SNSF) through the National Centre of Competence in Research Bio-Inspired Nanomaterials [156871, 156372, 182317]
- Adolphe Merkle Foundation (Fribourg, Switzerland)
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This study found that polymer-coated gold nanoparticles mainly interact with a subpopulation of B cells called age-associated B cells. However, they do not affect the percentages of other B cell populations or immune responses. These findings suggest that gold nanoparticles may be a safe tool for targeted therapy.
Engineered gold nanoparticles (GNPs) have become a useful tool in various therapeutic and diagnostic applications. Uncertainty remains regarding the possible impact of GNPs on the immune system. In this regard, we investigated the interactions of polymer-coated GNPs with B cells and their functions in mice. Surprisingly, we observed that polymer-coated GNPs mainly interact with the recently identified subpopulation of B lymphocytes named age-associated B cells (ABCs). Importantly, we also showed that GNPs did not affect cell viability or the percentages of other B cell populations in different organs. Furthermore, GNPs did not activate B cell innate-like immune responses in any of the tested conditions, nor did they impair adaptive B cell responses in immunized mice. Together, these data provide an important contribution to the otherwise limited knowledge about GNP interference with B cell immune function, and demonstrate that GNPs represent a safe tool to target ABCs in vivo for potential clinical applications.
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