Accéder au contenu
Merck
  • Tamm-Horsfall glycoprotein links innate immune cell activation with adaptive immunity via a Toll-like receptor-4-dependent mechanism.

Tamm-Horsfall glycoprotein links innate immune cell activation with adaptive immunity via a Toll-like receptor-4-dependent mechanism.

The Journal of clinical investigation (2005-01-15)
Marcus D Säemann, Thomas Weichhart, Maximilian Zeyda, Günther Staffler, Michael Schunn, Karl M Stuhlmeier, Yuri Sobanov, Thomas M Stulnig, Shizuo Akira, Alexander von Gabain, Uwe von Ahsen, Walter H Hörl, Gerhard J Zlabinger
RÉSUMÉ

Tamm-Horsfall glycoprotein (THP) is expressed exclusively in the kidney and constitutes the most abundant protein in mammalian urine. A critical role for THP in antibacterial host defense and inflammatory disorders of the urogenital tract has been suggested. We demonstrate that THP activates myeloid DCs via Toll-like receptor-4 (TLR4) to acquire a fully mature DC phenotype. THP triggers typical TLR signaling, culminating in activation of NF-kappaB. Bone marrow-derived macrophages from TLR4- and MyD88-deficient mice were nonresponsive to THP in contrast to those from TLR2- and TLR9-deficient mice. In vivo THP-driven TNF-alpha production was evident in WT but not in Tlr4-/- mice. Importantly, generation of THP-specific Abs consistently detectable in urinary tract inflammation was completely blunted in Tlr4-/- mice. These data show that THP is a regulatory factor of innate and adaptive immunity and therefore could have significant impact on host immunity in the urinary tract.

MATÉRIAUX
Référence du produit
Marque
Description du produit

Sigma-Aldrich
Tamm-Horsfall Glycoprotein