A dual-action peptide-containing hydrogel targets wound infection and inflammation

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

There is a clinical need for improved wound treatments that prevent both infection and excessive inflammation. TCP-25, a thrombin-derived peptide, is antibacterial and scavenges pathogen-associated molecular patterns (PAMPs), such as lipopolysaccharide, thereby preventing CD14 interaction and Toll-like receptor dimerization, leading to reduced downstream immune activation. Here, we describe the development of a hydrogel formulation that was functionalized with TCP-25 to target bacteria and associated PAMP-induced inflammation. In vitro studies determined the polymer prerequisites for such TCP-25-mediated dual action, favoring the use of noncharged hydrophilic hydrogels, which enabled peptide conformational changes and LPS binding. The TCP-25-functionalized hydrogels killed Gram-positive Staphylococcus aureus and Gram-negative Pseudomonas aeruginosa bacteria in vitro, as well as in experimental mouse models of subcutaneous infection. The TCP-25 hydrogel also mediated reduction of LPS-induced local inflammatory responses, as demonstrated by analysis of local cytokine production and in vivo bioimaging using nuclear factor κB (NF-κB) reporter mice. In porcine partial thickness wound models, TCP-25 prevented infection with S. aureus and reduced concentrations of proinflammatory cytokines. Proteolytic fragmentation of TCP-25 in vitro yielded a series of bioactive TCP fragments that were identical or similar to those present in wounds in vivo. Together, the results demonstrate the therapeutic potential of TCP-25 hydrogel, a wound treatment based on the body's peptide defense, for prevention of both bacterial infection and the accompanying inflammation.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • University of Copenhagen
  • Medicon Village
  • Bispebjerg Hospital
  • Skåne University Hospital
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Immunologi inom det medicinska området
  • Immunologi
Originalspråkengelska
Artikelnummereaax6601
TidskriftScience Translational Medicine
Volym12
Utgåva nummer524
StatusPublished - 2020 jan 1
PublikationskategoriForskning
Peer review utfördJa