The role of hyaluronan degradation products as innate alloimmune agonists.

Published

Journal Article

Dendritic cells (DCs) play a key role in initiating alloimmunity yet the substances that activate them during the host response to transplantation remain elusive. In this study we examined the potential roles of endogenous innate immune agonists in activating dendritic cell-dependent alloimmunity. Using a murine in vitro culture system, we show that 135 KDa fragments of the extracellular matrix glycosaminoglycan hyaluronan induce dendritic cell maturation and initiate alloimmunity. Priming of alloimmunity by hyaluronan-activated DCs was dependent on signaling via TIR-associated protein, a Toll-like receptor (TLR) adaptor downstream of TLRs 2 and 4. However, this effect was independent of alternate TLR adaptors, MyD88 or Trif. Using an in vivo murine transplant model, we show that hyaluronan accumulated during skin transplant rejection. Examination of human lung transplant recipients demonstrated that increased levels of intragraft hyaluronan were associated with bronchiolitis obliterans syndrome. In conclusion, our study suggests that fragments of hyaluronan can act as innate immune agonists that activate alloimmunity.

Full Text

Duke Authors

Cited Authors

  • Tesar, BM; Jiang, D; Liang, J; Palmer, SM; Noble, PW; Goldstein, DR

Published Date

  • November 2006

Published In

Volume / Issue

  • 6 / 11

Start / End Page

  • 2622 - 2635

PubMed ID

  • 17049055

Pubmed Central ID

  • 17049055

International Standard Serial Number (ISSN)

  • 1600-6135

Digital Object Identifier (DOI)

  • 10.1111/j.1600-6143.2006.01537.x

Language

  • eng

Conference Location

  • United States