title: Effects of hyaluronic acid conjugation on anti-TNF-α inhibition of inflammation in burns.
abstract: Biomaterials capable of neutralizing specific cytokines could form the basis for treating a broad range of conditions characterized by intense, local inflammation. Severe burns, spanning partial- to full-thickness of the dermis, can result in complications due to acute inflammation that contributes to burn progression, and early mediation may be a key factor in rescuing thermally injured tissue from secondary necrosis to improve healing outcomes. In this work, we examined the effects on burn progression and influence on the inflammatory microenvironment of topical application of anti-tumor necrosis factor-α (anti-TNF-α) alone, mixed with hyaluronic acid (HA) or conjugated to HA. We found that non-conjugated anti-TNF-α decreased macrophage infiltration to a greater extent than that conjugated to HA; however, there was little effect on the degree of progression or IL-1β levels. A simple transport model is proposed to analyze the results, which predicts qualitative and quantitative differences between untreated burn sites and those treated with the conjugates. Our results indicate that conjugation of anti-TNF-α to high molecular weight HA provides sustained, local modulation of the post-injury inflammatory responses compared to direct administration of non-conjugated antibodies.
authors.affiliation: Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania.
authors.forename: Emily E
authors.initials: EE
authors.lastname: Friedrich
authors.forename: Liang Tso
authors.initials: LT
authors.lastname: Sun
authors.forename: Shanmugasundaram
authors.initials: S
authors.lastname: Natesan
authors.forename: David O
authors.initials: DO
authors.lastname: Zamora
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Christy
authors.forename: Newell R
authors.initials: NR
authors.lastname: Washburn
mesh_terms: D000818:Animals; D002056:Burns / Q000150:complications / Q000473:pathology*; D002452:Cell Count; D006820:Hyaluronic Acid / Q000494:pharmacology*; D007249:Inflammation / Q000150:complications / Q000473:pathology*; D053583:Interleukin-1beta / Q000378:metabolism; D008264:Macrophages / Q000187:drug effects / Q000473:pathology; D008954:Models, Biological; D051381:Rats; D017207:Rats, Sprague-Dawley; D013194:Staining and Labeling; D014409:Tumor Necrosis Factor-alpha / Q000037:antagonists & inhibitors* / Q000378:metabolism; D014746:Vimentin / Q000378:metabolism
chemical_list: D053583:Interleukin-1beta; D014409:Tumor Necrosis Factor-alpha; D014746:Vimentin; D006820:Hyaluronic Acid
keywords: TNF-alpha; burn wound, inflammation; hyaluronic acid; wound healing