Ultra-low dose of rituximab in rheumatoid arthritis: study protocol for a randomised controlled trial
Abstract Background A standard low-dosing schedule of rituximab (RTX; 2 × 500 mg or 1 × 1000 mg) is as effective for active rheumatoid arthritis (RA) as the registered dose (2 × 1000 mg). Moreover, several small uncontrolled studies suggest that even lower-dosed treatment with RTX also leads to good...
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| Format: | Article |
| Language: | English |
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BMC
2017-08-01
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| Series: | Trials |
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| Online Access: | http://link.springer.com/article/10.1186/s13063-017-2134-x |
| _version_ | 1818963576629493760 |
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| author | Alfons A. den Broeder Lise M. Verhoef Jaap Fransen Rogier Thurlings Bart J. F. van den Bemt Steven Teerenstra Nadine Boers Nathan den Broeder Frank H. J. van den Hoogen |
| author_facet | Alfons A. den Broeder Lise M. Verhoef Jaap Fransen Rogier Thurlings Bart J. F. van den Bemt Steven Teerenstra Nadine Boers Nathan den Broeder Frank H. J. van den Hoogen |
| author_sort | Alfons A. den Broeder |
| collection | DOAJ |
| description | Abstract Background A standard low-dosing schedule of rituximab (RTX; 2 × 500 mg or 1 × 1000 mg) is as effective for active rheumatoid arthritis (RA) as the registered dose (2 × 1000 mg). Moreover, several small uncontrolled studies suggest that even lower-dosed treatment with RTX also leads to good treatment response in patients with RA. Retreatment with such an ‘ultra-low’ dose RTX in patients who responded well to RTX induction treatment is of special interest, as long-term use of lower RTX doses may lead to shorter infusion duration, lower risk of adverse events and lower costs. However, the effect of ultra-low dose of RTX has not been investigated using a controlled trial of proper design and dimensions. Methods/Design REDO is an investigator driven six-month pragmatic, double-blind, randomised controlled non-inferiority trial on the effects of ultra-low-dose RTX (1 × 500 or 1 × 200 mg) compared to standard low dose (1 × 1000 mg) in RA patients who are being retreated with RTX. A total of 140 RA patients, having reached low disease activity (DAS28CRP < 2.9) after the previous RTX infusion and DAS28CRP < 3.5 at moment of retreatment, are randomised in a ratio of 1:2:2 to 1 × 1000 mg, 1 × 500 mg or 1 × 200 mg. The primary objective is testing non-inferiority of the ultra-low-dose vs. standard low-dose RTX, by comparing mean change in DAS28CRP from baseline to six months to the non-inferiority margin of 0.6. Secondary outcomes over the same period are: function; quality of life; safety; costs; and pharmacokinetics and dynamics as process measures. Discussion This study protocol shares characteristics of both early dose finding trials as well as late pragmatic clinical studies. Several choices in the design of this trial are described and possible consequences for RA treatment and expected biosimilar introduction are discussed. Trial registration Dutch Trial Register, NTR6117 . Registered on 15 November 2016 (CMO NL57520.091.16 , 8 November 2016) |
| first_indexed | 2024-12-20T12:47:25Z |
| format | Article |
| id | doaj.art-40d9d58a72df4917856fefc637c4679e |
| institution | Directory Open Access Journal |
| issn | 1745-6215 |
| language | English |
| last_indexed | 2024-12-20T12:47:25Z |
| publishDate | 2017-08-01 |
| publisher | BMC |
| record_format | Article |
| series | Trials |
| spelling | doaj.art-40d9d58a72df4917856fefc637c4679e2022-12-21T19:40:16ZengBMCTrials1745-62152017-08-011811910.1186/s13063-017-2134-xUltra-low dose of rituximab in rheumatoid arthritis: study protocol for a randomised controlled trialAlfons A. den Broeder0Lise M. Verhoef1Jaap Fransen2Rogier Thurlings3Bart J. F. van den Bemt4Steven Teerenstra5Nadine Boers6Nathan den Broeder7Frank H. J. van den Hoogen8Department of Rheumatology, Sint MaartenskliniekDepartment of Rheumatology, Sint MaartenskliniekDepartment of Rheumatology, RadboudumcDepartment of Rheumatology, RadboudumcDepartment of Pharmacy, Sint MaartenskliniekDepartment of for Health Evidence, Section of biostatistics, RadboudumcDepartment of Rheumatology, Sint MaartenskliniekDepartment of Rheumatology, Sint MaartenskliniekDepartment of Rheumatology, Sint MaartenskliniekAbstract Background A standard low-dosing schedule of rituximab (RTX; 2 × 500 mg or 1 × 1000 mg) is as effective for active rheumatoid arthritis (RA) as the registered dose (2 × 1000 mg). Moreover, several small uncontrolled studies suggest that even lower-dosed treatment with RTX also leads to good treatment response in patients with RA. Retreatment with such an ‘ultra-low’ dose RTX in patients who responded well to RTX induction treatment is of special interest, as long-term use of lower RTX doses may lead to shorter infusion duration, lower risk of adverse events and lower costs. However, the effect of ultra-low dose of RTX has not been investigated using a controlled trial of proper design and dimensions. Methods/Design REDO is an investigator driven six-month pragmatic, double-blind, randomised controlled non-inferiority trial on the effects of ultra-low-dose RTX (1 × 500 or 1 × 200 mg) compared to standard low dose (1 × 1000 mg) in RA patients who are being retreated with RTX. A total of 140 RA patients, having reached low disease activity (DAS28CRP < 2.9) after the previous RTX infusion and DAS28CRP < 3.5 at moment of retreatment, are randomised in a ratio of 1:2:2 to 1 × 1000 mg, 1 × 500 mg or 1 × 200 mg. The primary objective is testing non-inferiority of the ultra-low-dose vs. standard low-dose RTX, by comparing mean change in DAS28CRP from baseline to six months to the non-inferiority margin of 0.6. Secondary outcomes over the same period are: function; quality of life; safety; costs; and pharmacokinetics and dynamics as process measures. Discussion This study protocol shares characteristics of both early dose finding trials as well as late pragmatic clinical studies. Several choices in the design of this trial are described and possible consequences for RA treatment and expected biosimilar introduction are discussed. Trial registration Dutch Trial Register, NTR6117 . Registered on 15 November 2016 (CMO NL57520.091.16 , 8 November 2016)http://link.springer.com/article/10.1186/s13063-017-2134-xRheumatoid arthritisDose reductionRituximabLow doseRetreatmentRandomised controlled trial |
| spellingShingle | Alfons A. den Broeder Lise M. Verhoef Jaap Fransen Rogier Thurlings Bart J. F. van den Bemt Steven Teerenstra Nadine Boers Nathan den Broeder Frank H. J. van den Hoogen Ultra-low dose of rituximab in rheumatoid arthritis: study protocol for a randomised controlled trial Trials Rheumatoid arthritis Dose reduction Rituximab Low dose Retreatment Randomised controlled trial |
| title | Ultra-low dose of rituximab in rheumatoid arthritis: study protocol for a randomised controlled trial |
| title_full | Ultra-low dose of rituximab in rheumatoid arthritis: study protocol for a randomised controlled trial |
| title_fullStr | Ultra-low dose of rituximab in rheumatoid arthritis: study protocol for a randomised controlled trial |
| title_full_unstemmed | Ultra-low dose of rituximab in rheumatoid arthritis: study protocol for a randomised controlled trial |
| title_short | Ultra-low dose of rituximab in rheumatoid arthritis: study protocol for a randomised controlled trial |
| title_sort | ultra low dose of rituximab in rheumatoid arthritis study protocol for a randomised controlled trial |
| topic | Rheumatoid arthritis Dose reduction Rituximab Low dose Retreatment Randomised controlled trial |
| url | http://link.springer.com/article/10.1186/s13063-017-2134-x |
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