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Host inflammatory response to NiCr, CoCr, and Ti in a soft tissue implantation model
Author(s) -
Baldwin L.,
Hunt J.A.
Publication year - 2006
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.30856
Subject(s) - nichrome , downregulation and upregulation , inflammatory response , materials science , chromium , gene expression , inflammation , tumor necrosis factor alpha , titanium , infiltration (hvac) , cytokine , metallurgy , immunology , biology , gene , biochemistry , composite material
The inflammatory response to nickel chromium (NiCr), cobalt chromium (CoCr), and titanium (Ti) implants at 7 and 28 days was investigated using real‐time PCR analysis along with histological and immunohistochemical staining. Contrasting inflammatory profiles were found in response to the different metal compositions. The inflammatory profile induced by CoCr remained consistent and elevated during the 28‐day period with high cell counts associated with the implants and a progressive recruitment of T lymphocytes. The response to NiCr was also elevated, but with an initially low T‐lymphocyte infiltration that increased by the later time period. Ti indicated an early increased inflammatory response that had reduced by 28 days. Changes in gene expression demonstrated that Ti induced very low levels of expression of the three inflammatory cytokine genes. NiCr initiated a significant upregulation in gene expression for IL‐6 and TNF‐α. CoCr resulted in the highest upregulation of IL‐2 indicative of T‐lymphocyte activation to this material. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res, 2006