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Trials
Published in: Trials 1/2024

Open Access 01-12-2024 | Giant Cell Arteritis | Study protocol

The Meteoritics Trial: efficacy of methotrexate after remission-induction with tocilizumab and glucocorticoids in giant cell arteritis—study protocol for a randomized, double-blind, placebo-controlled, parallel-group phase II study

Authors: Lena Kreis, Christian Dejaco, Wolfgang Andreas Schmidt, Robert Németh, Nils Venhoff, Valentin Sebastian Schäfer

Published in: Trials | Issue 1/2024

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Abstract

Background

Glucocorticoids (GC) are the standard treatment for giant cell arteritis (GCA), even though they are associated with adverse side effects and high relapse rates. Tocilizumab (TCZ), an interleukin-6 receptor antagonist, has shown promise in sustaining remission and reducing the cumulative GC dosage, but it increases the risk of infections and is expensive. After discontinuation of TCZ, only about half of patients remain in remission. Additionally, only few studies have been conducted looking at remission maintenance, highlighting the need for alternative strategies to maintain remission in GCA. Methotrexate (MTX) has been shown to significantly decrease the risk of relapse in new-onset GCA and is already a proven safe drug in many rheumatologic diseases.

Methods

This study aims to evaluate the efficacy and safety of MTX in maintaining remission in patients with GCA who have previously been treated with GC and at least 6 months with TCZ. We hypothesize that MTX can maintain remission in GCA patients, who have achieved stable remission after treatment with GC and TCZ, and prevent the occurrence of relapses. The study design is a monocentric, randomized, double-blind, placebo-controlled, parallel-group phase II trial randomizing 40 GCA patients 1:1 into a MTX or placebo arm. Patients will receive 17.5 mg MTX/matching placebo weekly by subcutaneous injection for 12 months, with the possibility of dose reduction if clinically needed. A 6-month follow-up will take place. The primary endpoint is the time to first relapse in the MTX group versus placebo during the 12-month treatment period. Secondary outcomes include patient- and investigator-reported outcomes and laboratory findings, as well as the prevalence of aortitis, number of vasculitic vessels, and change in intima-media thickness during the study.

Discussion

This is the first clinical trial evaluating remission maintenance of GCA with MTX after a previous treatment cycle with TCZ. Following the discontinuation of TCZ in GCA, MTX could be a safe and inexpensive drug.

Trial registration

ClinicalTrials.gov, NCT05623592. Registered on 21 November 2022.
EU Clinical Trials Register, 2022-501058-12-00.
German Clinical Trials Register DRKS00030571.
Appendix
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Metadata
Title
The Meteoritics Trial: efficacy of methotrexate after remission-induction with tocilizumab and glucocorticoids in giant cell arteritis—study protocol for a randomized, double-blind, placebo-controlled, parallel-group phase II study
Authors
Lena Kreis
Christian Dejaco
Wolfgang Andreas Schmidt
Robert Németh
Nils Venhoff
Valentin Sebastian Schäfer
Publication date
01-12-2024
Publisher
BioMed Central
Published in
Trials / Issue 1/2024
Electronic ISSN: 1745-6215
DOI
https://doi.org/10.1186/s13063-024-07905-4

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