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Not yet recruiting NCT07005804

Calcium Pyrophosphate Deposition (CPPD) Disease

No phase Interventional Calcium Pyrophosphate Deposition Disease Rheumatic Diseases

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
The protocol lists: transcriptomic and metabolomic analysis.
Who it may be relevant to
Registry conditions: Calcium Pyrophosphate Deposition Disease, Rheumatic Diseases. Basic parameters: from 65 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
France
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

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Official title

Calcium Pyrophosphate Deposition (CPPD) Disease : Clinical and Paraclinical Profile, Gene Expression and Metabolomics of the Acute and Chronic Clinical Phenotype

Overview

The goal of this clinical trial is to describe the transcriptomic and metabolomic profile of patients with chronic Calcium Pyrophosphate Deposition (CPPD) compared to those with acute CPPD. The hypotheses are as follows : * It is hypothesised that there is a transcriptomic and metabolomic signature of CPPD which explains why therapeutic responses to different anti-inflammatory treatments differ from one phenotype to another one * It is hypothesised that the acute and chronic clinical phenotypes of CPPD have different clinical, biological and imaging characteristics, as well as a differing predisposition toward crystalline deposition and inflammatory pathway activation. The management of participants with chronic forms of the disease included in this research was modelled on the usual recommended management, including a biological workup, joint puncture, ultrasound and radiographic workup. Double-energy CT scans and transcriptomic and metabolomic analyses on plasma are not routine tests.

Interventions

  • Genetic transcriptomic and metabolomic analysis
    Venous blood samples for transcriptomic and metabolomic analysis will be taken in 3 x 4 mL ethylenediaminetetraacetic acid (EDTA) tubes and stored immediately at 4°C, before being cryopreserved at -80°C in 500 μL aliquots of plasma. In addition, for transcriptomic analysis, a sample will also be taken in a Paxgen RNA tube cryopreserved at -80°C.

Primary outcome measures

  • Transcriptomic profile [Time frame: 2 weeks]
  • Metabolomic profile [Time frame: 2 weeks]

Eligibility criteria

Inclusion Criteria - Acute forms of CPPD: retrospective part of the study

  • Cases included in the COLCHICORT cohort (NCT03128905), for whom this was the first acute episode of CPPD

Inclusion Criteria - Chronical forms of CPPD : prospective part of the study

  • Patients affiliated to the French social security system
  • Age ≥ 65 years
  • Diagnosis of chronic CPPD (recurrent acute or persistent arthritis), meeting ACR/EULAR 2023,11 classification criteria after evaluation by a rheumatologist in the rheumatology department
  • Progression of CPPD rheumatism for at least 3 months and still active CPPD rheumatism, defined by a visual analogue scale (VAS) of disease activity ≥ 40 and/or presentation of at least 1 crisis over the last 3 months
  • Glomerular Filtration Rate (GFR) in Chronic Kidney Disease Epidemiology (CKD EPI Collaboration) ≥ 30ml/min/1.73m2
  • Minimum time between the last intake of a crisis treatment and inclusion in the study, depending on their half-life, in order to not interfere with the results of the omics analyses: 2 weeks (Nonsteroidal Anti-Inflammatory Drugs Per Os (PO) or Intramuscular (IM) or Intravenous (IV); corticosteroids PO or IV; colchicine PO; anakinra Subcutaneous (SC), 1 month (methotrexate PO, tocilizumab SC), 3 months (canakinumab SC, tocilizumab IV)
  • Signed written consent for study participation

Exclusion Criteria - Acute forms of CPPD:

  • Missing data concerning transcriptomic and metabolomic analyses.
  • Opposition

Exclusion Criteria - For chronic forms of CPPD:

  • History of gout or presence of monosodium urate (MSU) crystals on joint fluid,
  • Cognitive decline (confusion and neurodegenerative diseases)
  • Inability to provide informed consent and disease VAS
  • Patient under guardianship or curatorship

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation
N/A
Model
Single group
Masking
Open label
Primary purpose
Basic science

Study locations

France · 1 center
  • Hôpital Saint-Philibert (GHICL) — Lomme

Identifiers

NCT: NCT07005804 · RC-P00127

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗