Clinical Case Summary

Aims: We report 3 cases of new inflammatory bowel disease (IBD) which occurred in multiple sclerosis (MS) patients undergoing ocrelizumab therapy over last year in Irish Teaching Hospital setting.
Background: Ocrelizumab, a monoclonal antibody targeting CD20-positive B cells, is an established treatment for MS. While it is generally well-tolerated, emerging reports suggest a possible link to gastrointestinal complications, including IBD.
Methods: Three MS patients presented after starting ocrelizumab with gastrointestinal symptoms suggestive of inflammatory bowel disease. They were fast-tracked for endoscopic evaluation by an experienced gastroenterologist specializing in IBD. Diagnosis was based on clinical presentation, endoscopic findings, and histological analysis. Data regarding symptom onset, disease severity, colitis grade, inflammation distribution, and treatment response were assessed.
Results: A temporal relationship was observed between ocrelizumab initiation and IBD onset in all three cases, with symptoms emerging after 4-6 infusions. Reported symptoms included diarrhoea, nausea, urgency, and abdominal pain. Faecal calprotectin levels at time of referral ranged from 900 to 1800 µg/g. Endoscopy confirmed mild colitis and terminal ileitis, while histology revealed active colitis with cryptitis, acute terminal ileitis, or normal colon findings. Treatment with steroids, Mesalazine, and antibiotics led to symptom resolution in all cases. Discontinuing ocrelizumab resulted in recovery within 4-6 weeks, with no relapse over an average follow-up of two months.
Conclusion: These cases suggest a potential association between ocrelizumab and IBD onset or exacerbation in MS patients. Symptom resolution upon drug withdrawal supports a possible causal relationship. Clinicians should be aware of this risk to facilitate early detection, management, and patient education.

References

https://journals.lww.com/acgcr/Fulltext/2022/01000/Severe_Ocrelizumab_Induced_Enterocolitis_Treated.31.aspx
https://pubmed.ncbi.nlm.nih.gov/32198886/

Disclosure

No Conflict of Interest

Introduction

Managing patients with severe irritable bowel syndrome (IBS) has significant challenges for practicing physicians due to the condition's refractoriness to standard therapy and the lack of clinical remission. The prevalence of IBS reaches 9–21% among the adult working population and is associated with a low quality of life. According to various sources, visceral hypersensitivity (VHS) plays a key role in the pathogenesis of IBS.

Aims & Methods

The aim is to show the relationship between clinical symptoms, the visceral sensitivity index, and the visceral sensitivity threshold in patients with severe IBS-D.
A total of 84 patients with severe IBS-D, according to the Rome IV criteria, were examined. The median (Me) patient age was 32 (25; 37.2) years, with a disease duration of 5 (4; 6) years. Pain syndrome was assessed using the VAS scale in points (pts.), the level of visceral sensitivity index (VSI) using the J. Labus questionnaire reflecting gastrointestinal anxiety (pts.), and the visceral sensitivity threshold (VST) was studied via balloon dilatation test (BDT) (ml). Statistical analysis was conducted using non-parametric methods (Statistica 12). Quantitative data were described using Me and interquartile ranges (Q1 – Q3). Differences were considered statistically significant at p < 0.05.

Results

Before treatment, all patients showed a high level of pain syndrome - 9 (8; 9) pts. on VAS, and level of gastrointestinal anxiety at 71.00 (63; 75) according to the J. Labus questionnaire. BDT data revealed a low VST (first threshold—urge to defecate): 34.00 (27; 43.5) mm Hg. After examination, patients were randomly divided into two equal groups. The first group received the SNRI antidepressant (duloxetine) 60 mg/day, while the second group received trimebutine maleate 600 mg/day for 8 weeks, followed by assessment of therapy effectiveness. In the first group, SNRI therapy showed positive dynamics: a decrease of pain levels (from 9 (9 - 10) to 2 (1.75 - 3), p < 0.01*), an increase in VST (from 34.0 (29.75, 45.0) to 92.0 (86.0, 123.0), p < 0.01*), and a reduction in gastrointestinal anxiety (from 56.50 (47.50 – 68.00) to 12.00 (10.00 – 19.25), p < 0.01*). No significant positive changes were achieved in the second group. After the treatment, the overall group showed an inverse correlation between abdominal pain (VAS) and VST (BDT data) (ρ = -0.772; p < 0.01), and between gastrointestinal anxiety (VSI by J. Labus) and VST (BDT data) (ρ = -0.782; p < 0.001).

Conclusion

The effectiveness of therapy in the first group of patients was associated with the severe course of IBS, characterized by high gastrointestinal anxiety, abdominal pain, and low VST. In the overall group, post-treatment correlation analysis revealed a connection between the severity of clinical presentation and VST levels (BDT). Balloon dilatation test allows an objective assessment of IBS severity and therapeutic effectiveness. The treatment of choice for severe IBS-D is the SNRI duloxetine, which acts on the pain center and patients' emotional status.