Related Experiment Video
Updated: Jun 2, 2026
Novel Diagnostics in Revision Arthroplasty: Implant Sonication and Multiplex Polymerase Chain Reaction
Published on: December 3, 2017
Molecular markers for diagnosis of periprosthetic joint infection
Christina L Jacovides1, Javad Parvizi, Bahar Adeli
1Rothman Institute of Orthopaedics at Thomas Jefferson University Hospital, Philadelphia, Pennsylvania 19107, USA.
Abstract:
Despite a battery of tests available for diagnosing periprosthetic joint infection, as yet, no gold standard has been identified. Our purpose was to measure inflammatory proteins in synovial fluid from patients undergoing revision arthroplasty for septic or aseptic failure. We analyzed 74 synovial fluid samples: 31 infected and 43 uninfected, based on clinical and laboratory criteria. Proteomics analysis and receiver operating characteristic curve analyses were conducted on 46 inflammatory proteins for each sample. Of 46 proteins, 5 (interleukin 6, interleukin 8, α(2)-macroglobulin, C-reactive protein, and vascular endothelial growth factor) had an area under the curve greater than 0.90. This prospective study has demonstrated promising results for the use of molecular markers in diagnosis of periprosthetic joint infection. Future studies will focus on designing assays with these proteins in mind.
Insights
Identifying specific inflammatory proteins in synovial fluid shows promise for diagnosing periprosthetic joint infection. This could lead to more accurate diagnostic tools for joint replacement complications.
Area of Science:
- Orthopedics
- Infectious Diseases
- Biomarker Discovery
Background:
- Periprosthetic joint infection (PJI) diagnosis lacks a definitive gold standard.
- Revision arthroplasty is performed for both septic and aseptic joint failures.
- Accurate diagnosis of PJI is crucial for effective treatment and patient outcomes.
Purpose of the Study:
- To identify and measure inflammatory proteins in synovial fluid.
- To differentiate between septic and aseptic failure in revision arthroplasty patients.
- To evaluate the diagnostic potential of specific molecular markers for PJI.
Main Methods:
- Analysis of 74 synovial fluid samples (31 infected, 43 uninfected).
- Proteomics analysis of 46 inflammatory proteins.
- Receiver operating characteristic (ROC) curve analysis to assess diagnostic accuracy.
Main Results:
- Five proteins demonstrated high diagnostic accuracy (Area Under the Curve > 0.90).
- Key proteins identified include interleukin-6, interleukin-8, α(2)-macroglobulin, C-reactive protein, and vascular endothelial growth factor.
- These markers show significant potential in distinguishing infected from non-infected joint fluid.
Conclusions:
- Specific inflammatory proteins in synovial fluid are promising biomarkers for PJI diagnosis.
- Further research can focus on developing diagnostic assays based on these identified proteins.
- This study supports the use of molecular diagnostics to improve PJI detection.
