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This study analyzes the correlation between serum and synovial fluid levels of four biomarkers in osteoarthritis patients with and without diabetes. Leptin and Osteocalcin levels showed correlation, while Bone Alkaline Phosphatase and Pyridinium levels did not. The findings reveal differences and similarities in biomarker levels based on comorbid diabetes.
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Figure 2. Correlation, if any, between serum and synovial fluid levels of four biomarkers. (a) Leptin levels in serum were correlated to those in synovial fluid. (b) Osteocalcin (OCN) levels in serum were correlated to those in synovial fluid. (c) Bone alkaline phosphatase (BAP) levels in serum were not correlated to those in synovial fluid. (d) Pyridinium (PYD) levels in serum were not correlated to those in synovial fluid. Black filled circles represent diabetes mellitus (DM) group, and light gray filled circles represent non-DM group. Regression line is indicated with black line. Oren TW, Botolin S, Williams A, Bucknell A, King KB. Arthroplasty in veterans: Analysis of cartilage, bone, serum, and synovial fluid reveals differences and similarities in osteoarthritis with and without comorbid diabetes. J Rehabil Res Dev. 2011;48(10):1195–1210.DOI:10.1682/JRRD.2010.09.0186