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. 2024 Sep 10;9(9):CD015443.
doi: 10.1002/14651858.CD015443.pub2.

Immunomodulators and immunosuppressants for progressive multiple sclerosis: a network meta-analysis

Affiliations

Immunomodulators and immunosuppressants for progressive multiple sclerosis: a network meta-analysis

Ben Ridley et al. Cochrane Database Syst Rev. .

Abstract

Background: In recent years a broader range of immunomodulatory and immunosuppressive treatment options have emerged for people with progressive forms of multiple sclerosis (PMS). While consensus supports these options as reducing relapses, their relative benefit and safety profiles remain unclear due to a lack of direct comparison trials.

Objectives: To compare through network meta-analysis the efficacy and safety of alemtuzumab, azathioprine, cladribine, cyclophosphamide, daclizumab, dimethylfumarate, diroximel fumarate, fingolimod, fludarabine, glatiramer acetate, immunoglobulins, interferon beta 1-a and beta 1-b, interferon beta-1b (Betaferon), interferon beta-1a (Avonex, Rebif), laquinimod, leflunomide, methotrexate, minocycline, mitoxantrone, mycophenolate mofetil, natalizumab, ocrelizumab, ofatumumab, ozanimod, pegylated interferon beta-1a, ponesimod, rituximab, siponimod, corticosteroids, and teriflunomide for PMS.

Search methods: We searched CENTRAL, MEDLINE, and Embase up to August 2022, as well as ClinicalTrials.gov and the WHO ICTRP.

Selection criteria: Randomised controlled trials (RCTs) that studied one or more treatments as monotherapy, compared to placebo or to another active agent, for use in adults with PMS.

Data collection and analysis: Two review authors independently selected studies and extracted data. We performed data synthesis by pair-wise and network meta-analysis. We assessed the certainty of the body of evidence according to GRADE.

Main results: We included 23 studies involving a total of 10,167 participants. The most frequent (39% of studies) reason for a rating of high risk of bias was sponsor role in study authorship and data management and analysis. Other concerns were performance, attrition, and selective reporting bias, with 8.7% of studies at high risk of bias for all three of these domains. The common comparator for network analysis was placebo. Relapses over 12 months: assessed in one study (318 participants). None of the treatments assessed showed moderate or high certainty evidence compared to placebo. Relapses over 24 months: assessed in six studies (1622 participants). The number of people with clinical relapses is probably trivially reduced with rituximab (risk ratio (RR) 0.60, 95% confidence interval (CI) 0.19 to 1.95; moderate certainty evidence). None of the remaining treatments assessed showed moderate or high certainty evidence compared to placebo. Relapses over 36 months: assessed in four studies (2095 participants). The number of people with clinical relapses is probably trivially reduced with interferon beta-1b (RR 0.82, 95% CI 0.73 to 0.93; moderate certainty evidence). None of the remaining treatments assessed showed moderate or high certainty evidence compared to placebo. Disability worsening over 24 months: assessed in 11 studies (5284 participants). None of the treatments assessed showed moderate or high certainty evidence compared to placebo. Disability worsening over 36 months: assessed in five studies (2827 participants). None of the treatments assessed showed moderate or high certainty evidence compared to placebo. Serious adverse events: assessed in 15 studies (8019 participants). None of the treatments assessed showed moderate or high certainty evidence compared to placebo. Discontinuation due to adverse events: assessed in 21 studies (9981 participants). The number of people who discontinued treatment due to adverse events is trivially increased with interferon beta-1a (odds ratio (OR) 2.93, 95% CI 1.64 to 5.26; high certainty evidence). The number of people who discontinued treatment due to adverse events is probably trivially increased with rituximab (OR 4.00, 95% CI 0.84 to 19.12; moderate certainty evidence); interferon beta-1b (OR 2.98, 95% CI 1.92 to 4.61; moderate certainty evidence); immunoglobulins (OR 1.95, 95% CI 0.99 to 3.84; moderate certainty evidence); glatiramer acetate (OR 3.98, 95% CI 1.48 to 10.72; moderate certainty evidence); natalizumab (OR 1.02, 95% CI 0.55 to 1.90; moderate certainty evidence); siponimod (OR 1.53, 95% CI 0.98 to 2.38; moderate certainty evidence); fingolimod (OR 2.29, 95% CI 1.46 to 3.60; moderate certainty evidence), and ocrelizumab (OR 1.24, 95% CI 0.54 to 2.86; moderate certainty evidence). None of the remaining treatments assessed showed moderate or high certainty evidence compared to placebo.

Authors' conclusions: The number of people with PMS with relapses is probably slightly reduced with rituximab at two years, and interferon beta-1b at three years, compared to placebo. Both drugs are also probably associated with a slightly higher proportion of withdrawals due to adverse events, as are immunoglobulins, glatiramer acetate, natalizumab, fingolimod, siponimod, and ocrelizumab; we have high confidence that this is the case with interferon beta-1a. We found only low or very low certainty evidence relating to disability progression for the included disease-modifying treatments compared to placebo, largely due to imprecision. We are also uncertain about the effect of interventions on serious adverse events, also because of imprecision. These findings are due in part to the short follow-up of the included RCTs, which lacked detection of less common severe adverse events. Moreover, the funding source of many included studies may have introduced bias into the results. Future research on PMS should include head-to-head rather than placebo-controlled trials, with a longer follow-up of at least three years. Given the relative rarity of PMS, controlled, non-randomised studies on large samples may usefully integrate data from pivotal RCTs. Outcomes valuable and meaningful to people with PMS should be consistently adopted and measured to permit the evaluation of relative effectiveness among treatments.

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Conflict of interest statement

BR: has worked as Managing Editor for the Cochrane Multiple Sclerosis and Rare Disease of the CNS Review Group and Cochrane Central Editorial Service. He was not involved in the editorial process of the current review.

SM: is the Joint‐Coordinating Editor of the Cochrane Drugs and Alcohol Group. She was not involved in the editorial process of the current review. She received funding from the Multiple Sclerosis International Federation to perform data extraction, risk of bias assessment, and assessment of the certainty of evidence.

MGL: received funding from Multiple Sclerosis International Federation to perform data extraction, risk of bias assessment, and assessment of the certainty of evidence.

CDG: received funding from the Multiple Sclerosis International Federation to perform the statistical analyses.

TP: received funding from the Multiple Sclerosis International Federation to contribute to the review.

GF: is the Joint‐Coordinating Editor of Cochrane Multiple Sclerosis and Rare Disease of the CNS Review Group. She was not involved in the editorial process of the current review. GF has been directly involved in a study that may meet the inclusion criteria for the review. In line with Cochrane's conflict of interest policy, GF was not involved in defining the overall inclusion and exclusion criteria for the review or in actions relating to their study when conducting the full review.

GP: has published opinions on the methodology of conducting interventions in the context of multiple sclerosis; has worked as an independent contractor with the Multiple Sclerosis Society, Bristol‐Myers Squibb, and Multiple Sclerosis International Federation; and has been involved in Data and Safety Monitoring with the UK National Institute for Health and Care Research.

MF: works as consultant neurologist in an inpatient clinic; has published opinions in a medical journal on other pharmaceuticals; and has received travel and meeting attendance support form Novartis, Merck, Biogen, Roche, and Sanofi Genzyme.

IT: has been directly involved in a study that may meet the inclusion criteria for the review. In line with Cochrane's conflict of interest policy, IT was not involved in defining the overall inclusion and exclusion criteria for the review or in actions relating to their study when conducting the full review.

EB: has worked as a health professional in an outpatient clinic; has published opinions in a medical journal on other pharmaceuticals; and has received travel and meeting attendance support from Roche, Sanofi Genzyme, and Biogen.

FN: is the Coordinating Editor of the Cochrane Multiple Sclerosis and Rare Disease of the CNS Review Group. He was not involved in the editorial process of the current review.

Figures

1
1
PRISMA flow chart.
2
2
Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.
3
3
Risk of bias summary: review authors' judgements about each risk of bias item for each included study.
4
4
Network plots of treatment comparisons for benefit and safety ‐ primary outcomes. The width of the lines is proportional to the precision of each pair of treatments, and the size of every circle is proportional to the number of trials comparing every pair of treatments. AE, adverse events; SAE, serious adverse events
5
5
Network plots of treatment comparisons for benefit and acceptability ‐ secondary outcomes. The width of the lines is proportional to the precision of each pair of treatments, and the size of every circle is proportional to the number of trials comparing every pair of treatments. Gd, gadolinium; w, weighted
6
6
Network meta‐analysis estimates of treatment benefit against placebo. AE, adverse events; CI, confidence interval; RR, risk ratio; SAE, serious adverse events
1.1
1.1. Analysis
Comparison 1: Treatment efficacy (primary outcomes): pairwise comparisons, Outcome 1: Relapse (12 months)
1.2
1.2. Analysis
Comparison 1: Treatment efficacy (primary outcomes): pairwise comparisons, Outcome 2: Relapse (24 months)
1.3
1.3. Analysis
Comparison 1: Treatment efficacy (primary outcomes): pairwise comparisons, Outcome 3: Relapse (36 months)
1.4
1.4. Analysis
Comparison 1: Treatment efficacy (primary outcomes): pairwise comparisons, Outcome 4: Disability worsening (24 months)
1.5
1.5. Analysis
Comparison 1: Treatment efficacy (primary outcomes): pairwise comparisons, Outcome 5: Disability worsening (36 months)
2.1
2.1. Analysis
Comparison 2: Treatment safety (primary outcomes): pairwise comparisons, Outcome 1: Serious adverse events
2.2
2.2. Analysis
Comparison 2: Treatment safety (primary outcomes): pairwise comparisons, Outcome 2: Discontinuations due to adverse events
3.1
3.1. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 1: New gadolinium‐enhancing positive T1‐weighted MRI lesions (12 months)
3.2
3.2. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 2: New gadolinium‐enhancing positive T1‐weighted MRI lesions (24 months)
3.3
3.3. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 3: New gadolinium‐enhancing positive T1‐weighted MRI lesions (36 months)
3.4
3.4. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 4: New or enlarging T2‐weighted MRI lesions (12 months)
3.5
3.5. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 5: New or enlarging T2‐weighted MRI lesions (24 months)
3.6
3.6. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 6: New or enlarging T2‐weighted MRI lesions (36 months)
3.7
3.7. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 7: QoL total (MSIS‐29)
3.8
3.8. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 8: QoL Mental (SF‐36)
3.9
3.9. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 9: QoL physical (SF‐36)
3.10
3.10. Analysis
Comparison 3: Treatment efficacy and safety (secondary outcomes): pairwise comparisons, Outcome 10: Mortality

Update of

  • doi: 10.1002/14651858.CD015443

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References to ongoing studies

EUCTR2012‐003056‐36 {published data only}
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EUCTR2014‐003021‐18‐PL {published data only}
    1. A safety and efficacy study of BG00012 in slowing the progression of disability in patients with Secondary Progressive Multiple Sclerosis. https://trialsearch.who.int/Trial2.aspx?TrialID=EUCTR2014%E2%80%90003021....
EUCTR2018‐001511‐73‐ES {published data only}
    1. A Study to Evaluate the Efficacy and Safety of Ocrelizumab in Adults with Primary Progressive Multiple Sclerosis. https://trialsearch.who.int/Trial2.aspx?TrialID=EUCTR2018%E2%80%90001511....
EUCTR2018‐001511‐73‐GB {published data only}
    1. A phase IIIb multicenter, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of ocrelizumab in adults with primary progressive multiple sclerosis. https://www.clinicaltrialsregister.eu/ctr-search/search?query=eudract_nu....
EUCTR2018‐005038‐39‐GB {published data only}
    1. A phase 2b study of Cladribine to halt deterioration in people with advanced multiple sclerosis. https://trialsearch.who.int/Trial2.aspx?TrialID=EUCTR2018%E2%80%90005038....
EUCTR2020‐002981‐15‐DK {published data only}
    1. Non-inferiority study of ocrelizumab and rituximab in active multiple sclerosis. https://trialsearch.who.int/Trial2.aspx?TrialID=EUCTR2020%E2%80%90002981....
IRCT20130812014333N125 {published data only}
    1. Comparison of effectiveness and complication of rituximab and fingolimod in improvement disability motion. https://trialsearch.who.int/Trial2.aspx?TrialID=IRCT20130812014333N125.
NCT04035005 {published data only}
    1. A Study to Evaluate the Efficacy and Safety of Ocrelizumab in Adults With Primary Progressive Multiple Sclerosis. https://clinicaltrials.gov/study/NCT04035005.
NCT04688788 {published data only}
    1. Non-inferiority Study of Ocrelizumab and Rituximab in Active Multiple Sclerosis. https://clinicaltrials.gov/ct2/show/NCT04688788.
NCT04695080 {published data only}
    1. ChariotMS - Cladribine to Halt Deterioration in People With Advanced Multiple Sclerosis (ChariotMS). https://clinicaltrials.gov/show/NCT04695080.

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