Mast cell accumulation precedes tissue fibrosis induced by intravenously administered amorphous silica nanoparticles.

Abstract:

:Despite the increasing use of amorphous silica nanoparticles (SNPs) in biomedical applications, their toxicity after intravenous administration remains a major concern. We investigated the effects of single 7 mg/kg intravenous infusions of 13 nm SNPs on hemodynamic parameters in rats. Hematological and biochemical parameters were assessed at 7, 30, and 60 d post treatment. Silicon content in the liver, lungs, heart, and kidney was analyzed, as well as tissue histology with special emphasis on mast cell (MC) content. SNP infusion had no effect on hemodynamics, nor did it alter hematological or biochemical parameters. SNP retention in the liver was conspicuous for up to 60 d. Among the other organs analyzed, silicon content was significantly increased only in the lung at 1-h post infusion. Despite the relatively low dose, SNP administration caused extensive liver remodeling, including the formation of multiple foreign body-type granulomas starting 7 d post treatment, and subsequent development of fibrosis. Histopathological changes in the liver were not preceded by hepatocyte necrosis. We found increased MC abundance in the liver, lungs, and heart starting on day 30 post treatment. MC recruitment in the liver preceded fibrosis, suggesting that MCs are involved in liver tissue remodeling elicited by intravenously administered SNPs.

journal_name

Toxicol Mech Methods

authors

Zhuravskii S,Yukina G,Kulikova O,Panevin A,Tomson V,Korolev D,Galagudza M

doi

10.3109/15376516.2016.1169341

subject

Has Abstract

pub_date

2016-05-01 00:00:00

pages

260-9

issue

4

eissn

1537-6516

issn

1537-6524

journal_volume

26

pub_type

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