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Merck's MS treatment shows promise in new data

July 12, 2018 By pharmatimes
Tag: neurology , HRA

In this post-hoc analysis, two clinically relevant definitions of high disease activity were selected to effectively identify patients more likely to experience disease progression. Patients from the CLARITY study with high disease activity were categorised by fulfilling one of two overlapping criteria, which reflect those included in the EU SmPC for Maveclad:

High Relapse Activity (HRA): Patients with ≥2 relapses during the year prior to study entry, whether on disease-modifying drug (DMD) treatment or not

High Relapse Activity plus Disease Activity on Treatment (HRA + DAT): patients with ≥1 relapse and ≥1 T1 Gadolinium-enhancing (Gd) + or ≥9 T2 lesions during the year prior to study entry while on therapy with other DMDs, plus patients with ≥2 relapses during the year prior to study entry, whether on DMD treatment or not.

HRA and HRA + DAT patients showed clinical and MRI responses to Mavenclad that were generally better than, or at least comparable with, the outcomes previously seen in the overall CLARITY study population.

In both high disease subgroups, Mavenclad was shown to reduce the risk of 6-month EDSS progression by 82% vs placebo, compared to a 47% reduction in the overall CLARITY study population.

The newly published analysis also evaluated disease-free status, showing that in the HRA + DAT subgroup, treatment with Mavenclad was significantly more likely to result in NEDA (odds ratio 7.82 (95% CI 4.03–15.19; p<0.0001) when compared with the non-HRA + DAT subgroup 4.46 (95% CI 3.13-6.26)). The HRA subgroup was also more likely to achieve NEDA, but a statistically significant difference was not observed when compared to the non-HRA group.

The relative risk of cumulative new T1 Gd+ lesions for patients in both high-disease subgroups treated with Mavenclad was low, with strong effects observed in each treatment subgroup. Overall, the subgroup-specific safety analysis for patients with HRA and HRA+DAT did not reveal evidence for new safety findings compared with those previously described for the overall CLARITY population.

“This analysis provides valuable insights on the effect of Mavenclad on patients with ongoing disease activity despite treatment with platform therapy, as well as naïve patients with more relapses at baseline, who tend to do worse over time,” said Prof. Gavin Giovannoni, a lead investigator in the CLARITY studies and Chair of Neurology, Barts and The London School of Medicine and Dentistry. “The efficacy data presented in this publication show an even greater risk reduction on expanded disability status scale (EDSS) progression with Mavenclad in patients with highly active MS.”

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