Disease Activity Not Adversely Affected by Starting MTX 1 Month Later
Regarding medication doses at 12 months, the cumulative glucocorticoid doses were similar between groups during the follow-up. As expected, the 1-year cumulative dose of MTX was higher in those given the drug immediately after vaccination vs delayed (826 vs 734 mg), but the weekly mean doses of MTX were similar at 3, 6, and 12 months between the two groups, and likewise, the use of targeted disease-modifying antirheumatic drugs (DMARDs) at 1 year was comparable. The cumulative glucocorticoid dose at 12 months was similar at 1716 mg with delayed MTX and 1613 mg with immediate MTX.
Not unexpectedly, at 1 month, DAS28 scores were higher with delayed vs immediate MTX at 3.95 vs 3.38 for DAS28-ESR and 3.54 vs 3.01 for DAS28-CRP (P < .01), but after the first month, DAS28 scores were similar between the two groups.
No significant differences were found between the groups for adverse event rates within 7 days of receiving PCV13, with local and systemic reactions occurring at 60%-61% and 50%-58%, respectively; fever at 0%-4%; and severe infections at 12%.
Finally, no difference was found in terms of serious adverse events between groups, with one pneumococcal infection with delayed MTX during follow-up, and there were no unexpected side effects observed with the PCV13 and PPV23 vaccinations.
Rheumatologists’ Reactions
Ernest Choy, MD, head of rheumatology and translational research at the Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, Wales, asked if any individual showed no humoral response at all rather than a reduced response. “I ask because if there is no humoral response, then they are at very high risk, and there will be clinical relevance to that.”
Dr. Morel replied that “one serotype showed no response, at least according to the assays used, but we don’t know why. We analyzed at the population [level], not at the individual level, so it is difficult to answer the question.”
Another delegate asked what the participants thought about delaying MTX by 1 month. “When we tell the patient we need to vaccinate before we can use methotrexate [because] otherwise, we will reduce the response to the vaccination, then patient accepts it,” said Dr. Morel, adding that, “we allowed a minimal dose of steroids, and we saw from the results that the DAS28 at 1 month had changed.”
Co-moderator Katerina Chatzidionysiou, MD, PhD, a consultant rheumatologist and head of the Clinical Trial Department Rheumatology Unit, Karolinska University Hospital, Stockholm, Sweden, said that “As a physician, I’d feel uncomfortable delaying MTX if they had very active disease even for a short period of time.”
Dr. Morel replied that, “Today, we have so many drugs that can control the disease, for example, the targeted DMARDs. Progression does not show much variation, and we know x-ray progression with today’s drugs is a lot less than previously.”
Dr. Morel reported financial relationships with AbbVie, Amgen, Biogen, Bristol Myers Squibb, Fresenius Kabi, Galapagos, GlaxoSmithKline, Lilly, Medac, Nordic Pharma, Novartis, Pfizer, Sandoz, Sanofi, Boehringer Ingelheim, and Servier. Dr. Choy had no relevant financial relationships of relevance to this study.
A version of this article appeared on Medscape.com.