Hemocompatibility and biocompatibility of antibacterial biomimetic hybrid films.

Abstract:

:In previous work, we developed novel antibacterial hybrid coatings based on dextran containing dispersed Ag NPs (~5 nm, DEX-Ag) aimed to offer dual protection against two of the most common complications associated with implant surgery, infections and rejection of the implant. However, their blood-material interactions are unknown. In this study, we assess the hemocompatibility and biocompatibility of DEX-Ag using fresh blood and two cell lines of the immune system, monocytes (THP-1 cells) and macrophages (PMA-stimulated THP-1 cells). Glass, polyurethane (PU) and bare dextran (DEX) were used as reference surfaces. PU, DEX and DEX-Ag exhibited non-hemolytic properties. Relative to glass (100%), platelet attachment on PU, DEX and DEX-Ag was 15%, 10% and 34%, respectively. Further, we assessed cell morphology and viability, pro-inflammatory cytokines expression (TNF-α and IL-1β), pro-inflammatory eicosanoid expression (Prostaglandin E2, PGE2) and release of reactive oxygen species (ROS, superoxide and H2O2) following incubation of the cells with the surfaces. The morphology and cell viability of THP-1 cells were not affected by DEX-Ag whereas DEX-Ag minimized spreading of PMA-stimulated THP-1 cells and caused a reduction in cell viability (16% relative to other surfaces). Although DEX-Ag slightly enhanced release of ROS, the expression of pro-inflammatory cytokines remained minimal with similar levels of PGE2, as compared to the other surfaces studied. These results highlight low toxicity of DEX-Ag and hold promise for future applications in vivo.

journal_name

Toxicol Appl Pharmacol

authors

Coll Ferrer MC,Eckmann UN,Composto RJ,Eckmann DM

doi

10.1016/j.taap.2013.07.023

subject

Has Abstract

pub_date

2013-11-01 00:00:00

pages

703-12

issue

3

eissn

0041-008X

issn

1096-0333

pii

S0041-008X(13)00332-3

journal_volume

272

pub_type

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