Analysis of Human Knee Joint Fluid Using Metabonomic, Genomic and Tribology Techniques

Looking for Biomarkers in Human Joint Fluid Using Metabonomic, Microbiomic and Tribological Analysis

Making the diagnosis underlying a painful, swollen joint currently involves aspiration followed by numerous microbiological and biochemical laboratory tests. This can be costly, time consuming and in the case of an acutely swollen joint, lead to a lengthy inpatient admission. There is an unmet need to provide a quick, easy, reliable dipstick like test to analyse joint fluid in the community, clinic, or emergency department setting.

The investigators aim to use well established metabonomic techniques to:

1. Analyse fluid from patients with swollen joints
2. Identify potential biomarkers of inflammatory, infective and osteoarthritic causes of joint swelling
3. Correlate this with lubrication and wear properties of the fluid The long term goal is to develop time saving, cost effective, non-invasive diagnostic tests to improve management of a swollen joint. The biomedical research centre at Imperial provides a unique and unparalleled clinical and scientific environment to conduct this research. The Imperial College division of Computational and Systems Medicine has an international reputation in metabonomics and this, together with the high volume of patients with swollen joints treated at Imperial National Health Service Trust (c1000/yr) ensures that the study can take place in an environment conductive to success.

Study Overview

• Status: Unknown
• Conditions: Osteoarthritis; Rheumatoid Arthritis; Septic Arthritis
• Intervention / Treatment: Procedure: Intra-articular aspiration of Joint; Procedure: Joint irrigation washout; Procedure: Revision Joint Arthroplasty; Procedure: Total Joint Arthroplasty

Detailed Description

Swollen joints represent a diagnostic challenge. Possible diagnoses include: osteoarthritis, gout, rheumatological disease or infection. Diagnostic methods are limited to microscopy, microbiology and trace analysis. These methods can be slow, time consuming, expensive and often inconclusive.

Osteoarthritis varies in the severity of any inflammatory response and subsequent symptoms. To date no molecular link has been established to explain this ambiguity. Previous studies have identified metabolites of the inflammatory response but failed to investigate any correlation with symptoms or response to targeted injections.

Microbial infections of joints are destructive. It typically takes 2-3 days to identify a causative organism and confirm diagnosis. Recent studies suggest low-level bacterial colonisation within joints. The investigators aim to analyse the joint fluid for any bacterial colonisation using enrichment and 16S Polymerase Chain Reaction (PCR) then correlate the results to the metabolic profile. In addition the investigators aim to seek metabolites indicative of the presence of a biofilm which, if present severely limits treatment options.

Metabonomics is the quantitative measurement of the dynamic multiparametric response of a living system to pathophysiological stimuli or genetic modification. This provides a global metabolic profile despite a complex biological sample and has proven useful in many fields.

Our hypotheses are:

1. Each pathology will have a unique metabolic profile
2. Inflammatory osteoarthritis will contain a different metabolic profile and potentially biomarkers to treatment and/or response
3. Specifically the presence and detection of organism sub-type and biofilm biomarkers
4. These profiles can be characterised by analysis of blood, urine and joint fluid
5. This data can be used to generate diagnostic tests that will aid management of a swollen joint.
6. There will be a correlation between metabolic profile and lubricant properties of the joint fluid, that can be utilised in future engineering strategies to manage osteoarthritis.

1. To analyse joint fluid from osteoarthritic joints to identify potential biomarkers of the disease and further understanding of the cartilage destruction pathways 2. To assess population variances in joint fluid composition using metabonomics and whether this composition correlates to arthropathy of joints 3. To study the lubrication and wear properties of the joint fluid and understand how the metabolic profile influences lubrication and subsequently joint wear.

4. To study joint fluid using metabonomics to identify biomarkers of bacterial colonisation in tandem with microbial 16S Polymerase Chain Reaction and genomic sequencing.

Project Timeline:

Phases of the project are to be as follows:

Full research, Site and Ethical Approval: Provisional ethics is already granted. No obstacles to research and site approval are expected and this should be achieved shortly afterwards. (success = ethical approval) Expected June 2015

Sample Collection: The investigators aim to recruit 150 patients to the study capturing a conservative estimate of 10 per week. All orthopaedic patients will be targeted. The majority are expected to be recruited from the elective theatres. (success = 150 pts recruited) June - September 2015 (onwards)

Metabonomic Analysis Method Development: Establishing Nuclear Magnetic Resonance (NMR) methodology for metabolic profiling of synovial fluid as a sample matrix. Method development of Liquid Chromatography Mass Spectroscopy (LCMS) untargeted and targeted methodology for synovial fluid (success = achieving robust, sensitive methodology) October 2015

Joint Fluid Tribology: Analysis of the lubricating properties of the joint fluid (success = 150 samples assayed) October - December 2015

Metabonomic Analysis: In order to yield the maximum results the investigators aim to analyse using NMR screening with untargeted and targeted LCMS analysis. With approximately 150 patients and thus 450 body fluid samples the investigators are estimating an analysis time of 6 months (success = metabolic profiling and targeted analysis) November - April 2016

Microbial Genetic Analysis: PCR and sequencing of the microbial genetic content of the joint fluid (success = completion in 150 samples) April - June 2016

Collation of results, Analysis and Reporting: Preparation of results for submission to a journal with an impact factor >10. (success = editorial acceptance of manuscript) July - October 2016

• Study Type: Observational
• Enrollment (Actual): 150

Contacts and Locations

Study Locations

• United Kingdom
  • London, United Kingdom, W2 1NY
    • Imperial College NHS Trust

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 16 years to 90 years (ADULT, OLDER_ADULT, CHILD)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

In summary we expect to recruit 150 subjects and sample three body fluid types. In some cases control and multiple time points will be collected.

Description

Inclusion Criteria:

• The patients will be recruited in several scenarios.

  1. Anyone receiving a diagnostic aspirate of joint.
  2. Patients undergoing joint arthroscopy
  3. Patients undergoing joint replacement
  4. Patients undergoing prosthetic joint revision surgery

Exclusion Criteria:

• No patient under 16 years or age or older than 80 years will be entered for the study.
• Any female patient who is pregnant will be excluded.
• Any patient medicated with anti-coagulants will be excluded.

Study Plan

How is the study designed?

Number of groups / cohorts

3

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Septic Arthritis; Patients suspected of having septic arthritis	Procedure: Intra-articular aspiration of Joint; Procedural sampling of the joint for diagnostic purposes; Procedure: Joint irrigation washout; Procedural washout for treatment purposes; Procedure: Revision Joint Arthroplasty
Osteoarthritis; Patients suffering with osteoarthritis undergoing an intervention	Procedure: Intra-articular aspiration of Joint; Procedural sampling of the joint for diagnostic purposes; Procedure: Joint irrigation washout; Procedural washout for treatment purposes; Procedure: Revision Joint Arthroplasty; Procedure: Total Joint Arthroplasty
Joint Revision; Patients who has a prosthetic joint in situ	Procedure: Intra-articular aspiration of Joint; Procedural sampling of the joint for diagnostic purposes; Procedure: Revision Joint Arthroplasty

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Metabolic profiling of all three body fluids in 100 + patients	14 months

Secondary Outcome Measures

Outcome Measure	Time Frame
DNA Profiling of 100 Joint fluid samples for the assay of the microbiome	14 months

Collaborators and Investigators

• Sponsor: Imperial College London
• Investigators: Principal Investigator: Chinmay Gupte, MBBChir, Imperial College London

Study record dates

Study Major Dates

• Study Start (ACTUAL): October 1, 2015
• Primary Completion (ANTICIPATED): October 1, 2021
• Study Completion (ANTICIPATED): October 1, 2021

Study Registration Dates

• First Submitted: May 28, 2015
• First Submitted That Met QC Criteria: September 30, 2015
• First Posted (ESTIMATE): October 1, 2015

Study Record Updates

• Last Update Posted (ACTUAL): August 20, 2019
• Last Update Submitted That Met QC Criteria: August 16, 2019
• Last Verified: August 1, 2019

More Information

Terms related to this study

• Keywords: Osteoarthritis; Septic Arthritis
• Additional Relevant MeSH Terms: Infections; Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases; Arthritis; Osteoarthritis; Arthritis, Infectious
• Other Study ID Numbers: 15/LO/0388

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No