{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,19]],"date-time":"2026-03-19T16:58:07Z","timestamp":1773939487112,"version":"3.50.1"},"reference-count":40,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2015,8,6]],"date-time":"2015-08-06T00:00:00Z","timestamp":1438819200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Dutch Arthritis Foundation (Reumafonds LLP-13)"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2016,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:label\/><jats:p>To allow prediction of the risk of loosening prior to surgery, we investigated the relationship between innate immune cytokine response via TLR2 stimulation and early migration of six different knee prostheses using RSA (radiostereometry). This study included 114 patients of a prospective RSA\u2010cohort who received a total knee arthroplasty. Whole blood cytokine responses were obtained by ex vivo stimulation with tripalmitoyl\u2010S\u2010glycerylcysteine (Pam3Cys\u2010SK4) for assessment of the TLR2 immune response. Early migration was calculated using the maximum total point motion (MTPM) 1 year post surgery. Principal component analysis (PCA) was applied to the cytokine data to reduce the correlated data of individual cytokines and identified two components. Subsequently, linear mixed model analyses were applied with adjustments for gender, age, BMI, time\u2010to\u2010blood sampling, and prosthesis type. Component 1, consisting of IFN\u03b3, IL\u201012p40, IL\u201010, IL\u20101\u03b2, TNF\u03b1, and IL\u20106, showed a significant inverse association (<jats:italic>\u03b2<\/jats:italic>\u2009=\u2009\u22120.128; <jats:italic>p<\/jats:italic>\u2009=\u20090.041) with MTPM. Further analysis showed that IFN\u03b3 (<jats:italic>\u03b2<\/jats:italic>\u2009=\u2009\u22120.161, <jats:italic>p<\/jats:italic>\u2009=\u20090.008) had the highest contribution to this association and is particularly found in patients receiving another prosthesis than Nexgen (<jats:italic>\u03b2<\/jats:italic>\u2009=\u2009\u22120.239; <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). In conclusion, patients with high levels of IFN\u03b3 upon stimulation of TLR2 are at lower risk of early migration of their knee prosthesis. \u00a9 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. 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