Positioning biologics in the management of moderate to severe Crohn's disease

Controversies in the management of anti-TNF therapy in patients with Crohn's disease: a Delphi consensus

BACKGROUND

Despite research, there are still controversial areas in the management of Crohn's disease (CD).

OBJECTIVE

To establish practical recommendations on using anti-tumour necrosis factor (TNF) drugs in patients with moderate-to-severe CD.

METHODS

Clinical controversies in the management of CD using anti-TNF therapies were identified. A comprehensive literature review was performed, and a national survey was launched to examine current clinical practices when using anti-TNF therapies. Their results were discussed by expert gastroenterologists within a nominal group meeting, and a set of statements was proposed and tested in a Delphi process.

RESULTS

Qualitative study. The survey and Delphi process were sent to 244 CD-treating physicians (response rate: 58%). A total of 14 statements were generated. All but two achieved agreement. These statements cover: (1) use of first-line non-anti-TNF biological therapy; (2) role of HLA-DQA1*05 in daily practice; (3) attitudes in primary non-response and loss of response to anti-TNF therapy due to immunogenicity; (4) use of ustekinumab or vedolizumab if a change in action mechanism is warranted; (5) anti-TNF drug level monitoring; (6) combined therapy with an immunomodulator.

CONCLUSION

This document sought to pull together the best evidence, experts' opinions, and treating physicians' attitudes when using anti-TNF therapies in patients with CD.

Has the therapeutical ceiling been reached in Crohn's disease randomized controlled trials? A systematic review and meta-analysis

BACKGROUND AND AIMS

The availability of biological agents for inflammatory bowel disease has increased over the past years. In this systematic review and meta-analysis, we aimed to explore time trends in clinical response and clinical remission rates in Crohn's disease (CD) patients treated with biologics while discussing the need for new strategies.

METHODS

MEDLINE, Cochrane, and ISI Web of Science databases were searched for randomized placebo-controlled trials with biological agents in moderate-to-severe CD patients. Sub-group and meta-regression analyses compared treatment and placebo by calculating the pooled odds ratios of clinical remission and clinical response, across time categories and publication year. We also estimated the proportion of patients achieving clinical remission and clinical response by comparing both groups according to the publication year.

RESULTS

Twenty-five trials were included in the systematic review, which enrolled 8879 patients between 1997 and 2022. The clinical remission and clinical response odds, in induction and maintenance, have been constant over time, as no statistically significant differences were found between time categories (interaction p-values: clinical remission [induction, p = 0.19; maintenance, p = 0.24]; clinical response [induction, p = 0.43; maintenance, p = 0.59]). In meta-regression analyses, publication year did not influence these outcomes (clinical remission [induction, OR 1.01{95% CI 0.97-1.05}, p = 0.72; clinical response [induction, OR 1.01{95% CI 0.97-1.04]; p = 0.63; maintenance, OR 1.03{95% CI 0.98-1.07}; p = 0.21]), with the exception of clinical remission in maintenance studies, which presented a decreased effect (odds ratio 0.97{95% CI 0.94-1.00}, p = 0.03]).

CONCLUSIONS

Our review highlights that the odds of clinical outcomes in CD patients receiving biological treatment relative to placebo have been stable in the last decades.

Whole-exome sequencing in a subject with fluctuating neuropsychiatric symptoms, immunoglobulin G1 deficiency, and subsequent development of Crohn's disease: a case report

BACKGROUND

Mutations or polymorphisms of genes that are associated with inflammasome functions are known to predispose individuals to Crohn's disease and likely affect clinical presentations and responses to therapeutic agents in patients with Crohn's disease. The presence of additional gene mutations/polymorphisms that can modify immune responses may further affect clinical features, making diagnosis and management of Crohn's disease even more challenging. Whole-exome sequencing is expected to be instrumental in understanding atypical presentations of Crohn's disease and the selection of therapeutic measures, especially when multiple gene mutations/polymorphisms affect patients with Crohn's disease. We report the case of a non-Hispanic Caucasian female patient with Crohn's disease who was initially diagnosed with pediatric acute-onset neuropsychiatric syndrome with fluctuating anxiety symptoms at 9 years of age. This patient was initially managed with pulse oral corticosteroid treatment and then intravenous immunoglobulin due to her immunoglobulin G1 deficiency. At 15 years of age, she was diagnosed with Crohn's disease, following onset of acute abdomen. Treatment with oral corticosteroid and then tumor necrosis factor-α blockers (adalimumab and infliximab) led to remission of Crohn's disease. However, she continued to suffer from chronic abdominal pain, persistent headache, general fatigue, and joint ache involving multiple joints. Extensive gastrointestinal workup was unrevealing, but whole-exome sequencing identified two autosomal dominant gene variants: NLRP12 (loss of function) and IRF2BP2 (gain of function). Based on whole-exome sequencing findings, infliximab was discontinued and anakinra, an interleukin-1β blocker, was started, rendering marked improvement of her clinical symptoms. However, Crohn's disease lesions recurred following Yersinia enterocolitis. The patient was successfully treated with a blocker of interleukin-12p40 (ustekinumab), and anakinra was discontinued following remission of her Crohn's disease lesions.

CONCLUSION

Loss-of-function mutation of NRLRP12 gene augments production of interleukin-1β and tumor necrosis factor-α, while gain-of-function mutation of IRF2BP2 impairs cytokine production and B cell differentiation. We propose that the presence of these two autosomal dominant variants caused an atypical clinical presentation of Crohn's disease.

Crohn disease: Identification, diagnosis, and clinical management

ABSTRACT

Crohn disease is an inflammatory bowel disorder affecting children and adults. With its increasing prevalence, healthcare providers need adequate resources to assist with diagnosis and management. This article discusses early diagnosis, disease severity and classification, familial predisposition and genomics, and clinical management in the primary care setting.