Reduced Acute Inflammatory Responses to Microgel Conformal Coatings

Overview

Journal Biomaterials

Specialty Biomedical Engineering

Date 2008 Sep 23

PMID 18804859

Citations 28

Authors

Amanda W Bridges

Neetu Singh

Kellie L Burns

Julia E Babensee

L Andrew Lyon

Andres J Garcia

Affiliations

Soon will be listed here.

Abstract

Implantation of synthetic materials into the body elicits inflammatory host responses that limit medical device integration and biological performance. This inflammatory cascade involves protein adsorption, leukocyte recruitment and activation, cytokine release, and fibrous encapsulation of the implant. We present a coating strategy based on thin films of poly(N-isopropylacrylamide) hydrogel microparticles (i.e. microgels) cross-linked with poly(ethylene glycol) diacrylate. These particles were grafted onto a clinically relevant polymeric material to generate conformal coatings that significantly reduced in vitro fibrinogen adsorption and primary human monocyte/macrophage adhesion and spreading. These microgel coatings also reduced leukocyte adhesion and expression of pro-inflammatory cytokines (TNF-alpha, IL-1beta, MCP-1) in response to materials implanted acutely in the murine intraperitoneal space. These microgel coatings can be applied to biomedical implants as a protective coating to attenuate biofouling, leukocyte adhesion and activation, and adverse host responses for biomedical and biotechnological applications.

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