Presence of functional TLR2 and TLR4 on human adipocytes - Université de La Réunion
Article Dans Une Revue Histochemistry and Cell Biology Année : 2007

Presence of functional TLR2 and TLR4 on human adipocytes

Sandrine Bès-Houtmann
  • Fonction : Auteur
Régis Roche
  • Fonction : Auteur
Laurence Hoareau
  • Fonction : Auteur
  • PersonId : 970129
Franck Festy
  • Fonction : Auteur
  • PersonId : 1032984
Henri Caillens
  • Fonction : Auteur

Résumé

In addition to the well-known role of adipose tissue in energy metabolism, it has recently been demonstrated that this tissue can secrete a large array of molecules, including inflammatory cytokines. Furthermore, recent studies suggest that adipose cells can behave as immune cells. Therefore, the aim of this study was to determine the presence of the two most prominent ‘pattern recognition receptors’ for bacterial and fungal cell wall components, TLR2 and TLR4 on human adipose cells, as well as to assess their functionality. We demonstrated that TLR2 and TLR4 were expressed at relatively high levels (compared to a monocyte cell line) on the surface of human adipose cells. Stimulation of human adipocytes with lipopolysaccharide (LPS), or with lipoteichoic acid (LTA), two specific ligands of TLR4 and TLR2, respectively, induced a strong increase in TNFα production. The specificity of the response was demonstrated by the use of anti-TLR4 and anti-TLR2 blocking antibodies, which were able to decrease LPS- or LTA-induced TNFα secretion. Thus, it is clear that these receptors are functional in human adipocytes. This study adds weight to the argument that human fat tissue plays a potential role in innate immunity.

Dates et versions

hal-02301479 , version 1 (30-09-2019)

Identifiants

Citer

Sandrine Bès-Houtmann, Régis Roche, Laurence Hoareau, Marie-Paule Gonthier, Franck Festy, et al.. Presence of functional TLR2 and TLR4 on human adipocytes. Histochemistry and Cell Biology, 2007, 127 (2), pp.131-137. ⟨10.1007/s00418-006-0230-1⟩. ⟨hal-02301479⟩
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