Insights into the impact of silver nanoparticles on human keratinocytes metabolism through NMR metabolomics

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Carrola, J (Author) Other; Bastos, V (Author) Other; Ferreira de Oliveira, JMPF (Author) FFUP; Oliveira, H (Author) Other; Santos, C (Author) FCUP; Gil, AM (Author) Other; Duarte, IF (Author) Other

Journal

Title: Archives of Biochemistry and Biophysics

Vol. 589

Pages: 53-61

ISSN: 0003-9861

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 47 Citations

Scopus - 51 Citations

Other information

Authenticus ID: P-00K-08T

DOI: 10.1016/j.abb.2015.08.022

Abstract (EN): Due to their antimicrobial properties, silver nanoparticles (AgNPs) are increasingly incorporated into consumer goods and medical products. Their potential toxicity to human cells is however a major concern, and there is a need for improved understanding of their effects on cell metabolism and function. Here, Nuclear Magnetic Resonance (NMR) metabolomics was used to investigate the metabolic profile of human epidermis keratinocytes (HaCaT cell line) exposed for 48 h to 30 nm citrate-stabilized spherical AgNPs (10 and 40 p.g/mL). Intracellular aqueous extracts, organic extracts and extracellular culture medium were analysed to provide an integrated view of the cellular metabolic response. The specific metabolite variations, highlighted through multivariate analysis and confirmed by spectral integration, suggested that HaCaT cells exposed to AgNPs displayed upregulated glutathione-based antioxidant protection, increased glutaminolysis, downregulated tricarboxylic acid (TCA) cycle activity, energy depletion and cell membrane modification. Importantly, most metabolic changes were apparent in cells exposed to a concentration of AgNPs which did not affect cell viability at significant levels, thus underlying the sensitivity of NMR metabolomics to detect early biochemical events, even in the absence of a clear cytotoxic response. It can be concluded that NMR metabolomics is an important new tool in the field of in vitro nanotoxicology.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9