ClinicalTrials.gg
Not yet recruitingNCT07005804PYC-OMICUpdated Jun 5, 2025

Calcium Pyrophosphate Deposition (CPPD) Disease

An interventional study of transcriptomic and metabolomic analysis in Calcium Pyrophosphate Deposition Disease and Rheumatic Diseases, sponsored by Lille Catholic University. Not yet recruiting at 1 site in France. Open to participants aged 65 Years and older. Per ClinicalTrials.gov, last updated 2025-06-05.

Sponsored by Lille Catholic University · Not applicable, Interventional, and Basic science

Phase
Not applicable
Study type
Interventional
Enrollment
137
Allocation
Not applicable
Ages
65 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 25 studies in Rheumatic Diseases with a site in France — 8 open to participants now, 8 under way, none of them phase 3. Rheumatic Diseases · France.

Planned enrollment
5th of 10
137 · median 123
Started
2025
with 1 other
No phase
8 of 25
3 open now
Registered
23rd of 25
by date

Among the 25 studies in Rheumatic Diseases with a site in France, this one is the 5th largest by planned enrollment of the 10 interventional ones that give a count, is one of 2 that started in 2025, is one of 8 with no phase, and was the 23rd registered.

Rheumatic Diseases

264 studies on the registry are indexed under Rheumatic Diseases; 60 are open to participants now.

Browse Rheumatic Diseases studies →

Open to participants now

8 of the 25 studies in Rheumatic Diseases with a site in France are open now. Recruiting first, the newest first:

2 more — sign in →

All 8 open studies →

A study can be open while its sites in France have not opened yet or have stopped. Only those recruiting at a site in France →

Who these studies take

Of the 41 Rheumatic Diseases studies recruiting now, 18 (44%) set no upper age limit and 12 (29%) stop at 75 or younger; 7 take children under 18; 11 take healthy volunteers.

This study: 65 Years and older · all sexes · no healthy volunteers.

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02

Study summary

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.

03

Conditions studied

  • Calcium Pyrophosphate Deposition Disease
  • Rheumatic Diseases

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Keywords

  • Calcium pyrophosphate deposition disease
  • gene expression
  • acute clinical phenotype
  • chronic clinical phenotype
  • metabolic expression
04

Who can participate

Ages eligible
65 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

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
  • (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); 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 and disease VAS
  • Patient under guardianship or curatorship
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
137 participants (estimated)

Study arms

  • Experimental
    Patients with a chronic CPPD

    Patients with diagnosis of chronic calcium pyrophosphate crystal arthritis (either acute recurrent or persistent arthritis), meeting the 2023 American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) classification criteria, after evaluation by a rheumatologist from the rheumatology department.

    Genetic: transcriptomic and metabolomic analysis

Interventions

  • Genetictranscriptomic 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.

06

What researchers measure

Primary outcomes

  1. Transcriptomic profile

    -Quantitative transcriptomic profiling (expression of the genes involved) and qualitative profiling (analysis of the sequence of variants expressed)

    Time frame: 2 weeks

  2. Metabolomic profile

    - Metabolomic profile: quantitative assessment of the metabolites involved in each phenotype, then qualitatively grouped by activated metabolic pathway

    Time frame: 2 weeks

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Oct 2025; primary completion for May 2027, 19 months later.

Of 72 non-industry interventional studies with no phase under Rheumatic Diseases, half reached primary completion within 26 months of starting (the median), counting those still running; a quarter within 10 and three quarters within 46. This study's planned 19 months is below that.

Counting every sponsor, half of 74 studies reached it within 26 months; a quarter within 10 and three quarters within 46.

How these figures are worked out, and which studies are left out of them.

Registered
May 26, 2025
First posted
Jun 5, 2025
StartEst.
Oct 2025
Primary completionEst.
May 2027
CompletionEst.
Nov 2027
Last update
Jun 5, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 5, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07005804
Responsible party
Sponsor
First posted
Jun 5, 2025
Start date
Oct 2025 (estimated)
Primary completion
May 2027 (estimated)
Completion
Nov 2027 (estimated)
Last update
Jun 5, 2025

Study contacts

Marie Paule LEBITASY
Contact
Lebitasy.Marie-Paule@ghicl.net
+333 20 22 57 41
Marie DESOLERE
Contact
desolere.marie@ghicl.net
+33 320225931
Charlotte JAUFFRET
principal investigator · Rheumatology Department - Hôpital Saint-Vincent - GHICL

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in May 2025. You cannot join it, but the record below documents what was studied.

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