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Langenbecks Arch Surg. 2009 May;394(3):495-502. doi: 10.1007/s00423-009-0472-1. Epub 2009 Mar 12.

Studies on the biocompatibility and the interaction of silver nanoparticles with human mesenchymal stem cells (hMSCs).

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  • 1Department of Surgery, Surgical Research, Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil GmbH, Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany. christina.greulich@rub.de

Abstract

PURPOSE:

Silver nanoparticles (Ag-NPs) are widely used in different areas, e.g., in the food, electronic, or clothing industry due to well-known slow-release antiseptic activities. Despite the widespread use of nanosilver, there is a serious lack of information concerning the biological activities of nanosilver on human tissue cells.

MATERIALS AND METHODS:

In this study, the influence of spherical Ag-NPs (diameter about 100 nm) on the biological functions (proliferation, cytokine release, and chemotaxis) of human mesenchymal stem cells (hMSCs) was analyzed.

RESULTS:

The results showed a concentration-dependent activation of hMSCs at nanosilver levels of 2.5 microg mL(-1), and cytotoxic cell reactions occurred at Ag-NPs concentrations above 5 microg mL(-1). Cell proliferation and the chemotaxis of hMSC both decreased with increasing Ag-NPs concentrations. Different effects on the cytokine release from hMSCs were observed in the presence of Ag-NPs and Ag(+) ions. The release of IL-8 was significantly increased at high but noncytotoxic concentrations of Ag-NPs (2.5 microg mL(-1)). In contrast, the levels of IL-6 and VEGF were concomitantly decreased compared to the control group. The synthesis of IL-11 was not affected at different Ag-NP concentrations. The agglomeration tendency of Ag-NPs in different biological media increased with a high electrolyte content, e.g., in RPMI. However, complexation with fetal calf serum in the cell culture media stabilized the Ag-NPs against agglomeration.

CONCLUSION:

In summary, the results showed that Ag-NPs exert cytotoxic effects on hMSCs at high concentrations but also induce cell activation (as analyzed by the release of IL-8) at high but nontoxic concentrations of nanosilver.

PMID:
19280220
[PubMed - indexed for MEDLINE]
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