Mirikizumab Improves Fatigue in Patients with Crohn's Disease in Phase 2 Trial
Mirikizumab is being studied for UC and CD, two forms of inflammatory bowel disease that can cause serious and debilitating symptoms, and disruptions in daily life.
"New data at DDW show that fatigue is more than a symptom of ulcerative colitis and Crohn's disease – two chronic, inflammatory bowel diseases that can be challenging to treat. It can also be an important predictor for the severity of a person's disease and the potential impact it has on their quality of life," said
Mirikizumab Demonstrated Improvements in Fatigue
In SERENITY, patients treated with mirikizumab saw improvements in fatigue during the induction period of 12 weeks, as measured by the mean change in FACIT-Fatigue scores from baseline compared to placebo (mirikizumab 200 mg: 10.81±1.73, p<0.001; 600 mg: 9.09±1.72, p=0.004; 1000 mg 9.62±1.22, p<0.001; placebo: 2.90±1.21). The FACIT–Fatigue scale is a validated 13-item questionnaire which assesses the impact of fatigue on daily activities in patients with chronic illnesses.
At the end of the 12-week induction period, patients treated with mirikizumab who achieved ≥1 point improvement in Simple Endoscopic Score for Crohn's Disease (SES-CD) were re-randomized 1:1 to continue to receive the same, once-monthly IV treatment or once-monthly mirikizumab 300 mg, administered subcutaneously, up to 52 weeks. Patients who received mirikizumab and did not have SES-CD improvement at 12 weeks and those who received placebo during induction received once-monthly mirikizumab 1000 mg, administered intravenously, up to one year.
At one year, improvements in fatigue were sustained among those treated with mirikizumab. For methodology, see "About the Analyses" section below.
In addition to these data, previously-presented results evaluating the efficacy and safety of mirikizumab through 52 weeks will also be presented virtually at DDW this year. In this study, the safety results were consistent with that of mirikizumab in UC and with the class.
Fatigue Among Patients with UC or CD is Associated with Higher Levels of Disease Activity, Decreased Work Productivity and Reduced Well-Being
In a real-world data analysis of the Study of a Prospective Adult Research Cohort with Inflammatory Bowel Disease (SPARC IBD), more than 40% of patients with UC (n=181) and nearly half of patients living with CD (47.7%, n=431) reported living with fatigue, as measured by those who indicated whether they had experienced fatigue within the last week.
Patients with UC who reported fatigue (n=184) also had higher levels of disease activity, (2.1 [1.86] vs. 0.7 [1.21], p<0.01), missed more days of work or school (6.1 days [33.21] vs. 0.2 days [1.32], p=0.05) and reported reduced general well-being (those who ranked general well-being as "poor to terrible" or "slightly under par": 111 [61.6%] vs. 52 [20%], p<0.01) compared to patients with UC who did not report fatigue (n=265). No statistically significant differences were seen in disease duration (11.6 years [10.27] vs. 11.6 years [9.94], p=0.99).
Patients with CD who reported fatigue (n=431) had longer disease duration (15.4 years [11.13] vs. 13.8 years [9.64], p=0.03), higher levels of disease activity (157.7 [97.57] vs. 83.8 [55.26], p<0.01), missed more days of work or school (6.1 days [26.69] vs. 0.4 days [2.11], p<0.01) and reported reduced general well-being (those who ranked general well-being as "poor to terrible" or "slightly under par": 271 [62.9%] vs. 97 [20.6%], p<0.01) compared to those with CD who did not report fatigue (n=472). For methodology, see "About the Analyses" section below.
Results from two analyses of a cross-sectional survey were also presented at DDW, which evaluated the burden of fatigue and rectal urgency, respectively, among 1,057 patients with UC and 1,228 patients with CD.
"Fatigue is a key symptom to monitor in people living with ulcerative colitis and Crohn's disease, as it is prevalent in both conditions and associated with higher levels of disease activity, decreased work productivity and worse quality of life," said
About The Analyses
- Mirikizumab Therapy is Associated with Improved Fatigue in Patients with Moderately to Severely Active Crohn's Disease
At baseline, 191 patients from the Phase 2 SERENITY trial were randomized 2:1:1:2 to once-monthly placebo, mirikizumab 200 mg, mirikizumab 600 mg or mirikizumab 1000 mg, administered intravenously. At 12 weeks, patients treated with mirikizumab who achieved ≥1 point improvement in Simple Endoscopic Score for Crohn's Disease (SES-CD) from baseline were re-randomized 1:1 to continue to receive the same, once-monthly IV treatment assignment or to once-monthly mirikizumab 300 mg, administered subcutaneously, up to 52 weeks. Patients who received mirikizumab and did not have any SES-CD improvement at 12 weeks and those who received placebo during induction received once-monthly mirikizumab 1000 mg, administered intravenously, up to 52 weeks. Fatigue was measured using the FACIT–Fatigue scale, a validated 13-item questionnaire which assesses the impact of fatigue on daily activities. Change from baseline to 12 weeks and 52 weeks in FACIT-Fatigue were calculated. P-values shown above are not adjusted for multiplicity. The effect of mirikizumab on rectal urgency was not evaluated in this study.
- Prevalence of Fatigue among Crohn's Disease and Ulcerative Colitis Patients: Analyses from SPARC IBD
Real-world data from 443 people with UC and 903 people with CD were analyzed in the Study of a Prospective Adult Research Cohort with Inflammatory Bowel Disease (SPARC IBD). Patients indicated if they experienced fatigue within the last week and were categorized as either having fatigue or not having fatigue. Descriptive and contingency table analyses were conducted to determine the overall prevalence of fatigue. In both patients with UC and CD, disease duration was measured by mean number of years, and number of days of work or school missed was measured by mean number of days in the past 12 months. For patients with UC, disease activity was measured by a mean UC Disease Activity Index (UCDAI) 6-point score, and for patients with CD, disease activity was measured by mean simplified CD activity index (sCDAI) score.
Mirikizumab is a humanized IgG4 monoclonal antibody that binds to the p19 subunit of interleukin 23. Mirikizumab is being studied for the treatment of immune diseases, including ulcerative colitis and Crohn's disease.
About the Mirikizumab Phase 2 Trial in Crohn's Disease
SERENITY, the Phase 2, multi-center, randomized, parallel-arm, double-blind, placebo-controlled trial was designed to assess the safety and efficacy of mirikizumab in patients with moderately to severely active Crohn's disease. At baseline, participants were randomized with a 2:1:1:2 allocation across four treatment arms (placebo, mirikizumab 200 mg, mirikizumab 600 mg and mirikizumab 1000 mg). The primary endpoint was endoscopic response as determined by the proportion of participants achieving at least 50 percent reduction from baseline on the Simple Endoscopic Score for Crohn's Disease (SES-CD) at Week 12. In May 2019, Lilly reported Phase 2 results showing more patients with moderate to severe Crohn's disease receiving mirikizumab achieved clinical remission and response at 12 weeks. Overall, the safety profile at 12 weeks was consistent with that of mirikizumab in studies of ulcerative colitis and with the class.
About Crohn's Disease
Crohn's disease, which is a form of inflammatory bowel disease (IBD), is a chronic immune-mediated condition of the gastrointestinal (GI) tract. Crohn's most commonly affects the end of the small bowel (the ileum) and the beginning of the colon, but it may affect any part of the GI tract, from the mouth to the anus. IBD, which is inclusive of Crohn's disease and ulcerative colitis, affects 10 million people worldwide.
About Ulcerative Colitis
Ulcerative colitis is a chronic inflammatory bowel disease that affects the colon. UC occurs when the immune system sends white blood cells into the lining of the intestines, where they produce chronic inflammation and ulcerations. There is an unmet need for additional treatment options for UC that provide meaningful symptom relief, including bowel urgency, and deliver sustained clinical remission.
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This press release contains forward-looking statements (as that term is defined in the Private Securities Litigation Reform Act of 1995) about mirikizumab as a potential treatment for patients with ulcerative colitis and/or Crohn's disease and reflects Lilly's current beliefs and expectations. However, as with any pharmaceutical product, there are substantial risks and uncertainties in the process of drug research, development, and commercialization. Among other things, there can be no guarantee that future study results will be consistent with study results to date, that mirikizumab will prove to be a safe and effective treatment or that mirikizumab will receive regulatory approvals or be commercially successful. For further discussion of these and other risks and uncertainties, see Lilly's most recent Form 10-K and Form 10-Q filings with the United States Securities and Exchange Commission. Except as required by law, Lilly undertakes no duty to update forward-looking statements to reflect events after the date of this release.
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