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Biomaterials 31 (2010) 2001-2009
The effect of zinc on hydroxyapatite-mediated activation of human polymorphonuclear neutrophils and bone implant-associated acute inflammation
F. Velard1, 2, D. Laurent-Maquin1, J. Braux1, C. Guillaume1, S. Bouthors1, Edouard Jallot3, J.-M. Nedelec4, A. Belaaouaj2, P. Laquerriere1, 5

Hydroxyapatite (HA) is widely used as coating biomaterial for prosthesis metal parts and as bone substitute. The release of HA particles induces an inflammatory response and, if uncontrolled, could result in implant loss. At the inflamed site, the polymorphonuclear cells (PMNs) represent the earliest phagocytic cells that predominate the cellular infiltrate. We have recently proposed that HA wear debris activate polymorphonuclear cells (PMNs) initiating and/or amplifying thereby the acute inflammatory response. Previous studies have shown that activation of monocytes by HA could be modulated by supplementing this latter with the divalent cation, Zinc. The purpose of this work was to investigate the modulation of PMNs activation following exposure to zinc-substituted HA. Our study demonstrate that addition of zinc to HA particles resulted in decreased levels of the pro-inflammatory mediator interleukin-8 (IL-8) and the matrix metallo-proteinase-9. We also show that these changes involve IL-8 receptors (CXCR-1 and CXCR-2).
1 :  Interface biomatériaux/Tissus hôtes
2 :  URCA - Université de Reims Champagne-Ardenne
3 :  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
4 :  LMI - Laboratoire des Matériaux Inorganiques
5 :  IPHC - Institut Pluridisciplinaire Hubert Curien
Sciences du Vivant/Ingénierie biomédicale/Biomatériaux


Inflammation Neutrophil Interleukin-8 Hydroxyapatite Zinc