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Role of Toll-like receptor 4 in the inflammation reaction surrounding silicone prosthesis

✍ Scribed by Isabelle Auquit-Auckbur; Frédérique Caillot; Christophe Arnoult; Jean-François Menard; Laurent Drouot; Philippe Courville; François Tron; Philippe Musette

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
857 KB
Volume
7
Category
Article
ISSN
1742-7061

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✦ Synopsis

The inflammation which occurs around the silicone prosthesis is a complex process that can provoke the failure of the device and compromise the health of the implanted patient. Toll-like receptors (TLRs), which are transmembrane proteins, are now known to act in the innate immune response and in endogenous inflammation. The aim of our study was to assess the role of TLR4 in the foreign body reaction to a silicone shell prosthesis. Disks of shell silicone prosthesis were implanted in the subcutaneous tissue of C57BL6-TLR4-/- and C57BL6-WT mice. At day 14, inflammatory cell infiltrate and vessel sections around the prosthesis were less numerous in TLR4-/- than in WT mice. A histomorphometric analysis showed that the capsule around the implant was 1.96-fold less thick in depleted TLR4 than in wild-type mice. In addition, vascular endothelial growth factor and transforming growth factor 1 were underexpressed in the surrounding tissue of the prosthesis in TLR4-/- mice. Our study suggests, from this foreign body response model against silicone in mice, that TLR4 plays a key role in the reaction process around silicone implants.

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