This is a french multicenter observational study assessing safety and efficacy of biosimilar of Tocilizumab in Giant Cell Arteritis (GCA) with active aortitis, including 14 reference centers from the Groupe d'Etude Français des vascularites des gros vaisseaux (GEFA). Giant Cell Arteritis (GCA), formerly known as temporal arteritis, is the most common form of systemic vasculitis in patients aged ≥ 50 years. GCA is defined by granulomatous arteritis that affects large#sized and medium#sized blood vessels with a predisposition to affect the cranial arteries. Aortitis accounted for more than 50% of GCA patients with the new imaging techniques. Aortitis is typically diagnosed using imaging tests such as magnetic resonance imaging (MRI) or Computed Tomography (CT) scans. Aortitis is an inflammation of the aorta, leading to a range of symptoms such as fever, weight loss, fatigue, and chest pain. In severe cases, aortic aneurysms or aortic dissection can occur, which can be life-threatening. Multiple reports have demonstrated the presence of abnormal pro-inflammatory cytokine production in large-vessel vasculitis patients, particularly those with GCA, including interleukin-1 (IL-1), IL-6, IL-18, tumor necrosis factor-α (TNF-α), and interferon-γ, by T lymphocytes and macrophages. IL-6 has been implicated as a crucial cytokine in the pathogenesis of aortitis and targeting its signaling has shown promising results in treating the condition. IL-6 inhibitors such as tocilizumab have been found to effectively reduce disease activity and improve clinical outcomes in GCA patients. The GIACTA study (GiAnt cell arteritis roActemra (tocilizumab) study) was a randomized, double-blind, placebo-controlled trial that evaluated the efficacy and safety of tocilizumab in the treatment of GCA. The study included 251 patients with newly diagnosed or relapsing GCA and found that treatment with tocilizumab significantly increased the proportion of patients who achieved sustained remission from GCA at 52 weeks, compared to placebo. Additionally, tocilizumab was associated with a lower incidence of disease flares and a reduced need for glucocorticoid therapy. Following the positive results of the GIACTA study, tocilizumab was approved for the treatment of GCA in adults with active disease, including aortitis, who have not responded to glucocorticoids, or for whom glucocorticoid therapy is not appropriate, by regulatory agencies around the world, including the US Food and Drug Administration and the European Medicines Agency. However, the efficacy of IL-6 inhibitors on aorta inflammation as assessed by modern and powerful imaging techniques has never been specifically studied in GCA. This observational study will provide important informations on the impact of Tyenne® (tocilizumab) associated with short term low dose steroids on clinical manifestations and vessel inflammation and damage in aortitis of GCA.
This is a prospective, observational study involving patients with active aortitis related to GCA. After verification of the inclusion and exclusion criteria, and signature of the consent form, patients are included in the study. Patients will be followed and managed according to standard of care (visits and exams). Oral corticosteroids must be at a stable dose for at least 2 weeks prior to the first administration of study drug at D0. * All patients will receive oral prednisone ≥ 10 mg/day (or oral corticosteroid equivalent) with a maximum of 60 mg/day of prednisone or equivalent. * A standardized prednisone reduction schedule (see below) will be applied to all groups as long as the disease is inactive, until prednisone is stopped. The aim is to taper off corticosteroids within eight weeks. * At D0, MSB11456 / 1 injection S/C weekly will be initiated * Blood samples will be taken every month up to week 52 for assessment of toxicity and inflammation markers. * Assessment of adverse events will be done routinely at weeks 12, 24, 36, 52 and 104. * Clinical evaluation will be performed routinely at weeks 12, 24, 36, 52 and 104. * Targeted imaging studies (angio-CT) will be performed routinely at 6, 12 and 24 months after the start of treatment and if new symptoms appear. * FDG Pet scan will be performed routinely at 6, 12 and 24 months after the start of treatment * Angio-CT and FDG Pet scan will be proofread centrally. A standardized prednisone reduction schedule (see below) will be applied to all patients as long as the disease is inactive, until prednisone is stopped : Baseline prednisone dose Corresponding dose (mg/day) at each week CG(mg/d) \_\_\_\_60\_\_\_\_\_50\_\_\_\_\_40\_\_\_\_\_30\_\_\_\_\_25\_\_\_\_\_20\_\_\_\_\_15\_\_\_\_10\_\_\_\_7.5 (at baseline) 60\_\_\_\_\_\_\_\_\_\_W0 50\_\_\_\_\_\_\_\_\_\_W1\_\_\_\_W0 40\_\_\_\_\_\_\_\_\_\_W2\_\_\_\_W1\_\_\_\_W0 30\_\_\_\_\_\_\_\_\_\_W3\_\_\_\_W2\_\_\_\_W1\_\_\_\_W0 25\_\_\_\_\_\_\_\_\_\_\_ - \_\_\_\_W3\_\_\_\_W2\_\_\_\_W1\_\_\_\_W0 20\_\_\_\_\_\_\_\_\_\_W4\_\_\_\_W4\_\_\_\_W3\_\_\_\_W2\_\_\_\_W1\_\_\_\_W0 15\_\_\_\_\_\_\_\_\_\_W5\_\_\_\_W5\_\_\_\_W4\_\_\_\_W3\_\_\_\_W2\_\_\_\_W1\_\_\_\_W0 10\_\_\_\_\_\_\_\_\_\_W6\_\_\_\_W6\_\_\_\_W5\_\_\_\_W4\_\_\_\_W3\_\_\_\_W2\_\_\_\_W2\_\_\_\_W0 7.5\_\_\_\_\_\_\_\_\_\_ - \_\_\_\_\_ - \_\_\_\_\_\_ - \_\_\_\_\_W5\_\_\_\_W4\_\_\_\_W3\_\_\_\_W3\_\_\_\_W1\_\_\_\_W0 5 \_\_\_\_\_\_\_\_\_\_\_W7\_\_\_\_W7\_\_\_\_W6\_\_\_\_W6\_\_\_\_W5\_\_\_\_W4\_\_\_\_W4\_\_\_\_W2\_\_\_\_W2 0 \_\_\_\_\_\_\_\_\_\_\_W8\_\_\_\_W8\_\_\_\_W7\_\_\_\_W7\_\_\_\_W6\_\_\_\_W6\_\_\_\_W5\_\_\_\_W4\_\_\_\_W4 Sample size: The investigators anticipated a remission rate of 70% at weel 24 based on pooled data from Viliger et al (1) and Stone et al (2). Viliger et al reported 85% of GCA remission at week 12 and week 52 with tocilizumab(1). Stone et al reported 56% of remission of GCA at week 52 under tocilizumab weekly with less than 10% of relpases between week 24 and week 52 (2). A total of 80 patients will ensure estimating the 24-week remission rate with a precision of +/- 11% using an exact 95% confidence intervalgiven the expected 70% remission rate. Statistical analysis: Descriptive analyses will be performed with counts and percent for discrete variables and median and interquartile range for continuous variables. The primary endpoint will be described with the 24-week remission proportion point estimate and its exact 95% confidence interval (95%CI) (Clopper Pearson). Secondary endpoints will be described using a similar approach for binary endpoints,continuous endpoints will be decsribed unsing median (IQR) and also mean (SD) with approximate Gaussian 95%CI for the mean.Kaplan Meier estimator or cumulative incidence estimates allowing competing risks when appropriate (i.e. treatment discontinuation due to toxicity), will be used for right-ecensored time to event variables, with 95% confidence intervals.
Study Type
OBSERVATIONAL
Enrollment
80
Département de Medecine interne et d'immunologie clinique - hôpital La Pitié Salpetrière
Paris, France
RECRUITINGTo evaluate the proportion of patients with remission of GCA
Proportion of patients with remission of GCA at week 24. EULAR consensus definitions for remission in GCA and other types of LVV is defined as the absence of all clinical signs and symptoms attributable to active LVV, normalization of ESR and CRP values, and no evidence of progressive aortic damage at angio CT and Tep FDG.
Time frame: week 24
To assess the cumulative incidence of relapse
Cumulative incidence of relapse
Time frame: Weeks 12, 24, 36 , 52 and 104
To assess the proportion of GCA in remission (according to EULAR consensus definitions) after treatment start
Proportion of GCA in remission according to EULAR consensus definitions) after treatment start
Time frame: Weeks 12, 24, 36 , 52 and 104
To assess the cumulative dose of prednisone
Cumulative prednisone dose
Time frame: Weeks 12, 24, 36, 52 and 104
To assess the cumulative incidence of severe adverse events
* Glucocorticoid Toxicity Index (GTI) at Weeks 24, 52 and 104; * Cumulative incidence of severe adverse events at Weeks 12, 24, 36 , 52 and 104, defined as those of grades III, IV or V, according to the Common Terminology Criteria for Adverse Events (CTCAE);
Time frame: Weeks 12, 24, 36, 52 and 104
To assess the proportion of radiological vascular progression
Proportion of radiological vascular progression defined by : * new vascular lesions detected in CTA * new vascular lesions detected in Tep-scan
Time frame: Weeks 12, 24, 36 , 52 and 104
To assess the cumulative incidence of vascular revascularization procedures
Cumulative incidence of vascular revascularization procedures needs (either endovascular or surgical) required due to inflammatory vascular activity
Time frame: Weeks 24, 52 and 104
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