View clinical trials related to Horton Disease.
Filter by:The goal of this clinical trial is to verify whether CHIP is correlated with the clinical, instrumental, and histological characteristics of GCA, and to characterize the pathogenetic effects of clonal hemopoiesis on vasculitis. The main objective of this study is to verify if clonal hematopoiesis of indeterminate potential (CHIP) affects GCA manifestations, course/response to therapies, and pathogenesis. Patients who are going to be diagnosed with GCA and for which a fast track is available for a rapid diagnostic work-up including pre-treatment temporal artery biopsy. Patients with CHIP will be identified and characterized by using whole exome sequencing from the peripheral blood samples. The presence and characteristics of CHIP will be correlated with baseline clinical, instrumental, and histologic GCA features.
Giant cell arteritis (GCA) or Horton's disease: frequent large vessel vasculitis (cephalic) (incidence estimated at 9 per 100,000 in France), potentially responsible for blindness. Treatment: corticosteroid therapy, which is effective in the vast majority of cases. Clinical problem: relapse; 36% to 44% of patients have a relapse that occurs in the first year for many patients, requiring a re-escalation of corticosteroid therapy, with its consequences: - Cumulative dose of corticosteroid therapy that causes cardiovascular and infectious morbidity. - Requires additional immunosuppressive treatment.
It is hypothesized that chewing-gums may be a useful test to unmask jaws intermittent claudication in order to enhance the diagnosis of Giant Cell Arteritis (GCA).
The use of ultrasonography in detecting giant cell arteritis ( GCA) is emerging. Currently, temporal biopsy is the gold standard to diagnose GCA but studies have shown the interest to use B mode ultrasonography. However, until now, the study of velocities in GCA have not been yet performed.
Giant-cell arteritis (GCA) is the most frequent vasculitis after 50 years. Corticosteroid therapy is the reference treatment for GCA. This treatment is highly effective but must be maintained for 12 to 24 months to avoid relapses, which causes the onset of numerous adverse effects in this elderly population. Currently clinicians have no way to estimate this risk of relapse during the treatment of GCA. Invariant T lymphocytes associated with the mucous membrane (MAIT), whose role in vasculitides has recently been shown and which produce IL-17 and IFN-γ, two key cytokines in the pathophysiology of GCA could be implicated in the pathophysiology of GCA and could constitute a predictive marker of relapse. Our hypothesis is that blood MAIT are recruited in the artery wall in patients with GCA and that the number of circulating MAIT in the blood falls and then returns to normal if the corticoids are effective. Given that it will be necessary to include a large number of patients to show that the persistence of a low number of circulating MAIT in patients treated with corticoids is a predictor of relapse, we propose, as the first step, to carry out a pilot study to obtain preliminary data on these new markers. The study is classified as interventional because a lot of blood samples are taken
The study aims at measuring the sensitivity and specificity of a series of imaging signs (recorded by magnetic resonance angiography, vascular tomodensitometry, vascular ultrasonography, retina angiography and retina optic coherence tomography) for the diagnosis of Horton disease, the gold standard being the result of temporal artery biopsy.