Cobalt nano-particles modulate cytokine in vitro release by human mononuclear cells mimicking autoimmune disease.

Abstract:

:The use of particles from micro to nanoscale provides benefits to diverse scientific fields, but because a large percentage of their atoms lie on the surface, nanomaterials could be highly reactive and pose potential risks to humans. Due to their wide range of application, Cobalt nano-particles are of great interest both in industry and in life-science. To date, there are few studies on Co nano-particle toxicology. In this respect, this study aims at evaluating in vitro the potential interference of Co nano-particles on the production of several cytokines (IL-2, IL-4, IL-6, IL-10, IFNgamma and TNFalpha) by PBMCs, comparing their effects to those of Co micro-particles and Co solution (CoCl2). Cells were cultured in Opticell flasks with escalating concentrations (10-5, 10-6 and 10-7 M), of Co nano and micro-particles and CoCl2 or without metal. Cytokines were quantified in the supernatants using a human Th1/Th2 cytokine cytometric bead array. Co micro-particles showed a greater inhibitory effect compared to other Co forms. Its inhibitory activity was detected at all concentrations and towards all cytokines, whereas Co solutions selectively inhibited IL-2, IL-10 and TNF-alpha at maximal concentration. Co nano-particles induced an increase of TNF-alpha and IFN-gamma release and an inhibition of IL-10 and IL-2: a cytokine pattern similar to that detected in the experimental and clinical autoimmunity. On the basis of the obtained data, immune endpoints should be sought in the next series of studies both in vitro and in vivo in subjects exposed to cobalt nano-particles.

authors

Petrarca C,Perrone A,Verna N,Verginelli F,Ponti J,Sabbioni E,Di Giampaolo L,Dadorante V,Schiavone C,Boscolo P,Mariani Costantini R,Di Gioacchino M

subject

Has Abstract

pub_date

2006-10-01 00:00:00

pages

11-4

issue

4 Suppl

eissn

0394-6320

issn

2058-7384

pii

3

journal_volume

19

pub_type

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