Active clinical trials for "Chondrocalcinosis"

The objective of this research is to collect data to create an observatory of microcrystalline rheumatism (gout and calcium-crystal rheumatism) in patients treated at the Groupement des Hôpitaux de l'Institut Catholique de Lille, in order to better understand the disease and improve patient care, in particular with the help of medical imaging.

Chondrocalcinosis, recently renamed the calcium pyrophosphate deposition (CPPD) disease, is a very frequent affection of the elderly and causes very painful arthritis. International recommendations for the treatment of patients suffering from CPPD are based upon rare studies, not randomized, with small samples, and thus very weak scientific evidence. The treatment of CPPD arthritis is extrapolated from the experience of gout treatment, another crystal deposition disease. Among recommended treatments, colchicine and oral steroids are recommended as first-line treatments, while NSAIDs are used with caution in elderly populations of patients. Colchicine utilization is not risk-free, in particular with old patients and patients with renal impairment. Drug interactions of colchicine can have serious consequences, especially in a polymedicated old patient's population. Oral steroids are an interesting alternative in this indication with a potential of being better tolerated, but comparative efficacy with colchicine needs to be studied. From a broader point of view, colchicine and oral steroids have never been compared in any crystal related arthritis. This is the first large randomized controlled trial for CPPD acute arthritis.

This study will investigate the hypothesis that probenecid, a medication currently used for gout, reduces levels of ATP in the joint fluid of patients with calcium pyrophosphate deposition disease (CPPD), another common type of crystal-related arthritis. There is good evidence that CPPD results from an excess of ATP in joints. The investigators will measure levels of ATP in joint fluid before and after 5 days of treatment with probenecid. This study will serve to rationalize larger studies of probenecid in CPPD.

This is a postmarketing study to assess the overall performance and survivorship of the SIGMA HP® PARTIAL KNEE SYSTEM.

Prospective study with an echography of the 2 knees and radiography of the 2 knees (front and profile) for each patient. If found calcification on ultrasound further examination with ultrasound wrists, hips and shoulders.

The purpose of this study is to determine whether thorough analytical evaluation is useful to diagnose metabolic conditions associated to calcium pyrophosphate deposition disease.

The purpose of this study is to obtain patient and stakeholder perspectives on what outcome measures should be included in future trials on CPPD (Calcium PyroPhosphate Deposition), a common form of inflammatory arthritis. This will form part of a wider OMERACT (Outcome Measures in Rheumatology) study, involving multiple international sites, to determine a core domain set (an agreed set of outcome measures) for this disease. In the UK, up to 10 patients with CPPD and their caregivers, healthcare professionals who care for patients with CPPD, and other stakeholders, which may include government organisations, non-government organisations, pharmaceutical representatives and health advocacy groups, will be invited to participate in a single, semi-structured interview. Interviews will be face-to-face or telephone, last up to one hour and digitally audio-recorded. For patients and their caregivers, interviews will explore their lived experience of CPPD, its impact on their daily lives, and the perceived relevance of outcome measures used in previous studies. For healthcare professionals and other stakeholders, interviews will explore their experience dealing with patients with CPPD, how they perceive CPPD impacts patient lives, and the perceived relevance of the outcome measures used in previous studies. Following analysis of the data, participants will be sent a short report with the researchers' findings, and asked to check the accuracy of these and provide brief written feedback. Interviews will also take place with patients, caregivers, healthcare practitioners and stakeholders at the other international sites where ethics committee approval will be sought locally. It is anticipated that around 30 participants will be recruited across all sites. Analysis of all interviews will be primarily conducted and managed at the UK site.

B cells are known to play an important role in auto-immune diseases by activating T cells, secreting inflammatory cytokines and autoreactive antibodies. However, a sub-type of B cells named regulatory B cells or Bregs has recently shown capacities to prevent or cure arthritis in mouse models. Bregs have also been identified in humans.

In recent years, ion channels have emerged as new therapeutic targets for pain. Among these channels, ASICs (Acid Sensing Ion Channels) are of particular interest because they are directly activated by extracellular acidity, which is a major cause of pain. Indeed, many painful conditions such as ischemia, inflammation, tumor development or tissue incision are accompanied by tissue acidification. ASIC are excitatory ion channels that are expressed in neurons, including nociceptive sensory neurons. In humans, the use of amiloride, a nonspecific inhibitor of ASICs, has demonstrated their role in the perception of pain induced by subcutaneous injections of acidic solutions. ASICs thus appear as new candidates capable of mediating pain in humans. A growing number of data suggests that, in addition to protons, ASICs may also be activated by one or more endogenous compounds produced during inflammation. The purpose of this research project is to identify these compounds by testing the effects of human inflammatory exudates on ASICs activity. The discovery of such compounds would definitely validate ASICs as novel therapeutic targets for pain treatment in humans