Clinical Effect of Mirikizumab Treatment on Bowel Urgency in Patients with Moderately to Severely Active Ulcerative Colitis and the Clinical Relevance of Bowel Urgency Improvement for Disease Remission

Fecal Urgency in Ulcerative Colitis: Impact on Quality of Life and Psychological Well-Being in Active and Inactive Disease States

Ulcerative colitis (UC) is a chronic, relapsing-and-remitting, potentially progressive form of inflammatory bowel disease (IBD) with multidimensional and often negative effects on patients' lives. Fecal urgency, the sudden and compelling desire to defecate, often accompanied by impaired bowel control leading to frequent and urgent trips to the bathroom, is a distressing symptom, experienced by more than 50% of patients with UC.1 Physicians frequently underestimate the burden of fecal urgency on patients' lives, with ramifications ranging from disruption in daily activities, social interactions, and emotional distress with resultant impairment in quality of life (QoL).2,3.

Anti-IL23/12 agents and JAK inhibitors for inflammatory bowel disease

IBD (inflammatory bowel disease) is a chronic inflammatory disease of the gastrointestinal tract with increasing incidence worldwide. Multiple factors, such as genetic background, environmental and luminal factors, and mucosal immune dysregulation, have been implicated in the cause of IBD, although the cause of the disease remains unknown. IL-12 and IL-23 and their downstream signaling pathways participate in the pathogenesis of inflammatory bowel disease. Early and aggressive treatment with biologic therapies or novel small molecules is needed to decrease complications and the need for hospitalization and surgery. The landscape of inflammatory bowel disease (IBD) treatment has tremendously improved with the development of biologics and small molecule drugs. Several novel biologics and small molecule drugs targeting IL-12 and IL-23 and their downstream targets have shown positive efficacy and safety data in clinical trials, and several drugs have been approved for the treatment of IBD. In the future, numerous potential emerging therapeutic options for IBD treatment are believed to come to the fore, achieving disease cure.

Insights into disability and psycho-social care of patients with inflammatory bowel disease

In recent years, the concept of disability has increasingly garnered attention as a crucial long-term target of inflammatory bowel disease (IBD) management. The treatment paradigm has changed dramatically from full control of the disease (clinical and endoscopic remission) toward physical and emotional well-being with the goal of preventing disability and normalizing quality of life. However, in certain cases, despite achieving good disease control, patients may still experience symptoms associated with disability, and reduced emotional wellness. These symptoms can significantly impact various biopsychosocial factors, including interpersonal relationships, educational or work-related activities, body image, and sexual functioning. Nevertheless, they often remain overlooked in the context of IBD care. In this narrative review, we aim to shed light on the burden of certain disability-related symptoms such as bowel urgency, sexual dysfunction, impaired fertility and fatigue, emphasizing the importance of acknowledging and validating them in a clinical setting. There is a demanding need for comprehensive care for IBD patients, with IBD clinicians being mindful of the psychosocial challenges faced by their patients. Providing timely and appropriate management of these challenges alongside IBD treatment is key to achieving holistic remission and enhancing the overall quality of life while reducing disability.

Efficacy and Safety of Etrasimod in Patients with Moderately to Severely Active Isolated Proctitis: Results From the Phase 3 ELEVATE UC Clinical Programme

BACKGROUND AND AIMS

Pivotal trials in ulcerative colitis have historically excluded patients with isolated proctitis. Etrasimod is an oral, oncedaily, selective sphingosine 1phosphate1,4,5 receptor modulator for the treatment of moderately to severely active ulcerative colitis. This post hoc analysis assessed efficacy and safety of etrasimod 2 mg once daily in patients with isolated proctitis (centrally read) from the phase 3 ELEVATE UC 52 and ELEVATE UC 12 trials.

METHODS

Patients, including those with isolated proctitis (<10 cm rectal involvement) who met all other inclusion criteria in ELEVATE UC 52 and ELEVATE UC 12, were randomised 2:1 to receive etrasimod or placebo. Primary, secondary and other identified efficacy endpoints and safety were assessed.

RESULTS

We analysed data from 64 and 723 patients at Week 12 (both trials pooled), and 36 and 397 patients at Week 52 (ELEVATE UC 52 only) with isolated proctitis and more extensive colitis (≥10 cm rectal involvement), respectively. Patients with isolated proctitis receiving etrasimod demonstrated significant improvements versus placebo, including clinical remission rates at Weeks 12 (42.9% vs 13.6%) and 52 (44.4% vs 11.1%), endoscopic improvement (52.4% vs 22.7%) at Week 12 and bowel urgency numerical rating scale score at Week 12 (all p<0.01). Generally similar trends were observed in patients with more extensive colitis. Safety was consistent across subgroups, with no new findings.

CONCLUSIONS

Etrasimod demonstrated significant improvements versus placebo in patients with isolated proctitis, and those with more extensive disease, in most efficacy endpoints at Week 12 and 52.

Two-Year Efficacy and Safety of Mirikizumab Following 104 Weeks of Continuous Treatment for Ulcerative Colitis: Results From the LUCENT-3 Open-Label Extension Study

BACKGROUND

Mirikizumab, a p19-directed interleukin-23 monoclonal antibody, is efficacious in inducing clinical remission at week 12 (W12) and maintaining clinical remission at W52 in patients with moderately to severely active ulcerative colitis. Results are presented from the open-label extension study through W104.

METHODS

Clinical, symptomatic, quality-of-life, and adverse event outcomes are reported for mirikizumab induction responders and extended induction responders, including biologic-failed patients, who entered LUCENT-3, with data shown for W52 maintenance responders or remitters. Discontinuations or missing data were handled by nonresponder imputation (NRI), modified NRI (mNRI), and observed case (OC).

RESULTS

Among W52 mirikizumab responders, clinical response at W104 was 74.5%, 87.2%, and 96.7% and clinical remission was 76.6%, 89.0%, and 98.3% for NRI, mNRI, and OC, respectively. Among W52 mirikizumab remitters, clinical response at W104 was 54.0%, 62.8%, and 70.1% and clinical remission was 65.6%, 76.1%, and 84.2%. Using mNRI, remission rates at W104 for W52 clinical remitters were 74.7% corticosteroid-free, 79.5% endoscopic, 63.9% histologic-endoscopic mucosal remission, 85.9% symptomatic, 59.8% bowel urgency, 80.5% Inflammatory Bowel Disease Questionnaire (using NRI), 71.2% histologic-endoscopic mucosal improvement, and 77.5% bowel urgency improvement. Previous biologic-failed vs not-biologic-failed patient data were generally similar. Extended induction mNRI clinical response was 81.9%. Serious adverse events were reported in 5.2% of patients; 2.8% discontinued treatment due to adverse events.

CONCLUSIONS

Endoscopic, histologic, symptomatic, and quality-of-life outcomes support the long-term benefit of mirikizumab treatment up to 104 weeks in patients with ulcerative colitis, including biologic-failed patients, with no new safety concerns.

Clinical Long-Term Outcomes of Patient-Reported Outcomes in the Prospective Real-World Tofacitinib Response in Ulcerative Colitis Registry

INTRODUCTION

We previously reported the results of tofacitinib induction therapy in the prospective multisite US real-world Tofacitinib Response in Ulcerative Colitis registry. We now assessed patient-reported outcomes (PROs) and predictors of success during tofacitinib maintenance therapy.

METHODS

Tofacitinib Response in Ulcerative Colitis included 103 patients with refractory ulcerative colitis (UC); 67% had failed ≥ 2 biologics. Patients reported the Simple Clinical Colitis Activity Index (SCCAI), Patient-Reported Outcome Measurement Information System measures for anxiety, depression, social satisfaction, and adverse events between weeks 8 and 52 using a web-based system. Paired t test and P for trend were used to compare changes in PRO measures over time. Bivariate analyses and logistic regression models were used to determine factors associated with response (SCCAI <5) or remission (SCCAI <2) at week 52.

RESULTS

Of 103 patients, 82.5% entered the maintenance phase and 43.7% remained on tofacitinib at week 52. Tofacitinib de-escalation to 5 mg BID occurred in 15% of patients. At week 52, 42.7% and 31.1% of all patients reported an SCCAI <5 and SCCAI ≤2, respectively. Normalization of bowel frequency, rectal bleeding, and urgency occurred in 79%, 61%, and 48% of patients remaining on maintenance therapy. Social satisfaction improved significantly ( P < 0.001), while anxiety and depression scores only numerically improved. No consistent predictors for tofacitinib long-term treatment efficacy were identified, and safety findings were consistent with the known safety profile of tofacitinib.

DISCUSSION

Tofacitinib is an effective maintenance therapy in patients with refractory UC. Dose reductions infrequently occurred during maintenance. Unmet needs in UC maintenance include improvement of urgency and psychosocial factors (NCT03772145).

Association of Bowel Urgency With Quality-of-Life Measures in Patients With Moderately-to-Severely Active Ulcerative Colitis: Results From Phase 3 LUCENT-1 (Induction) and LUCENT-2 (Maintenance) Studies

Background

Improvement in bowel urgency (BU) was associated with better clinical outcomes in phase 3 LUCENT-1 (induction) and LUCENT-2 (maintenance) studies in moderately-to-severely active ulcerative colitis (UC). We assessed association of BU with quality-of-life (QoL) outcomes.

Methods

LUCENT-1: 1162 patients randomized 3:1 to intravenous mirikizumab 300 mg or placebo every 4 weeks (Q4W) for 12 weeks. LUCENT-2: 544 mirikizumab induction responders re-randomized 2:1 to subcutaneous mirikizumab 200 mg or placebo Q4W through Week (W) 40 (W52 of continuous treatment). Patients reported BU severity in the past 24 hours using a validated Urgency Numeric Rating Scale (NRS). In patients with baseline Urgency NRS ≥3, the association between BU Clinically Meaningful Improvement (CMI; ≥3-point decrease) and remission (score 0 or 1) with patient-reported outcomes was assessed at W12 and W52.

Results

A significantly greater proportion of patients with versus without BU Remission achieved IBDQ remission (W12: 87.3% vs 42.7%, P < .0001; W52: 91.4% vs 45.5%, p < .0001). Similarly, BU Remission was associated with more patients achieving CMI in SF-36 Physical Component Summary (W12: 69.0% vs 44.4%, P < .0001; W52: 77.5% vs 42.1%, P < .0001) and Mental Component Summary (W12: 53.5% vs 41.0%, P = .0019; W52: 62.0% vs 38.3%, P < .0001) scores. At W12 and W52, patients with BU CMI or Remission showed significant improvements in EQ-5D-5L and Work Productivity and Activity Impairment:UC scores. Significant improvements were also seen in fatigue, abdominal pain, and nocturnal stool.

Conclusions

In patients with moderately-to-severely active UC, improvement in BU was associated with improved QoL in phase 3 LUCENT-1 and LUCENT-2 studies.

Clinical Studies

LUCENT-1: NCT03518086; LUCENT-2: NCT03524092.

Antibodies to watch in 2024

The 'Antibodies to Watch' article series provides an annual summary of commercially sponsored monoclonal antibody therapeutics currently in late-stage clinical development, regulatory review, and those recently granted a first approval in any country. In this installment, we discuss key details for 16 antibody therapeutics granted a first approval in 2023, as of November 17 (lecanemab (Leqembi), rozanolixizumab (RYSTIGGO), pozelimab (VEOPOZ), mirikizumab (Omvoh), talquetamab (Talvey), elranatamab (Elrexfio), epcoritamab (EPKINLY), glofitamab (COLUMVI), retifanlimab (Zynyz), concizumab (Alhemo), lebrikizumab (EBGLYSS), tafolecimab (SINTBILO), narlumosbart (Jinlitai), zuberitamab (Enrexib), adebrelimab (Arelili), and divozilimab (Ivlizi)). We briefly review 26 product candidates for which marketing applications are under consideration in at least one country or region, and 23 investigational antibody therapeutics that are forecast to enter regulatory review by the end of 2024 based on company disclosures. These nearly 50 product candidates include numerous innovative bispecific antibodies, such as odronextamab, ivonescimab, linvoseltamab, zenocutuzumab, and erfonrilimab, and antibody-drug conjugates, such as trastuzumab botidotin, patritumab deruxtecan, datopotamab deruxtecan, and MRG002, as well as a mixture of two immunocytokines (bifikafusp alfa and onfekafusp alfa). We also discuss clinical phase transition and overall approval success rates for antibody therapeutics, which are crucial to the biopharmaceutical industry because these rates inform decisions about resource allocation. Our analyses indicate that these molecules have approval success rates in the range of 14-32%, with higher rates associated with antibodies developed for non-cancer indications. Overall, our data suggest that antibody therapeutic development efforts by the biopharmaceutical industry are robust and increasingly successful.

Bowel Urgency in Ulcerative Colitis: Current Perspectives and Future Directions

Bowel urgency (BU), the sudden or immediate need for a bowel movement, is one of the most common and disruptive symptoms experienced by patients with ulcerative colitis (UC). Distinct from the separate symptom of increased stool frequency, BU has a substantial negative impact on quality of life and psychosocial functioning. Among patients with UC, BU is one of the top reasons for treatment dissatisfaction and one of the symptoms patients most want improved. Patients may not discuss BU often due to embarrassment, and healthcare providers may not address the symptom adequately due to the lack of awareness of validated tools and/or knowledge of the importance of assessing BU. The mechanism of BU in UC is multifactorial and includes inflammatory changes in the rectum that may be linked to hypersensitivity and reduced compliance of the rectum. Responsive and reliable patient-reported outcome measures of BU are needed to provide evidence of treatment benefits in clinical trials and facilitate communication in clinical practice. This review discusses the pathophysiology and clinical importance of BU in UC and its impact on the quality of life and psychosocial functioning. Patient-reported outcome measures developed to assess the severity of BU in UC are discussed alongside overviews of treatment options and clinical guidelines. Implications for the future management of UC from the perspective of BU are also explored.

The Role of IL-23 in the Pathogenesis and Therapy of Inflammatory Bowel Disease

Interleukin-23 (IL-23) is a proinflammatory cytokine produced mainly by macrophages and antigen-presenting cells (APCs) after antigenic stimulation. IL-23 plays a significant role as a mediator of tissue damage. Indeed, the irregularities in IL-23 and its receptor signaling have been implicated in inflammatory bowel disease. IL-23 interacts with both the innate and adaptive immune systems, and IL-23/Th17 appears to be involved in the development of chronic intestinal inflammation. The IL-23/Th17 axis may be a critical driver of this chronic inflammation. This review summarizes the main aspects of IL-23's biological function, cytokines that control cytokine production, effectors of the IL-23 response, and the molecular mechanisms associated with IBD pathogenesis. Although IL-23 modulates and impacts the development, course, and recurrence of the inflammatory response, the etiology and pathophysiology of IBD are not completely understood, but mechanism research shows huge potential for clinical applications as therapeutic targets in IBD treatment.