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Gu P, Mendonca O, Carter D, Dube S, Wang P, Huang X, Li D, Moore JH, McGovern DPB. AI-luminating Artificial Intelligence in Inflammatory Bowel Diseases: A Narrative Review on the Role of AI in Endoscopy, Histology, and Imaging for IBD. Inflamm Bowel Dis 2024:izae030. [PMID: 38452040 DOI: 10.1093/ibd/izae030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Indexed: 03/09/2024]
Abstract
Endoscopy, histology, and cross-sectional imaging serve as fundamental pillars in the detection, monitoring, and prognostication of inflammatory bowel disease (IBD). However, interpretation of these studies often relies on subjective human judgment, which can lead to delays, intra- and interobserver variability, and potential diagnostic discrepancies. With the rising incidence of IBD globally coupled with the exponential digitization of these data, there is a growing demand for innovative approaches to streamline diagnosis and elevate clinical decision-making. In this context, artificial intelligence (AI) technologies emerge as a timely solution to address the evolving challenges in IBD. Early studies using deep learning and radiomics approaches for endoscopy, histology, and imaging in IBD have demonstrated promising results for using AI to detect, diagnose, characterize, phenotype, and prognosticate IBD. Nonetheless, the available literature has inherent limitations and knowledge gaps that need to be addressed before AI can transition into a mainstream clinical tool for IBD. To better understand the potential value of integrating AI in IBD, we review the available literature to summarize our current understanding and identify gaps in knowledge to inform future investigations.
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Affiliation(s)
- Phillip Gu
- F. Widjaja Inflammatory Bowel Disease Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | | | - Dan Carter
- Department of Gastroenterology, Sheba Medical Center, Tel Aviv, Israel
| | - Shishir Dube
- F. Widjaja Inflammatory Bowel Disease Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Paul Wang
- Department of Computational Biomedicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Xiuzhen Huang
- Department of Computational Biomedicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Debiao Li
- Biomedical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jason H Moore
- Department of Computational Biomedicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Dermot P B McGovern
- F. Widjaja Inflammatory Bowel Disease Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Tang WJ, Shi P, Xia HJ, Wu J, Wang YH, Huang Y. Efficacy of exclusive enteral nutrition on the mucosal healing of different gastrointestinal segments in children with Crohn's disease. J Dig Dis 2024; 25:123-132. [PMID: 38556364 DOI: 10.1111/1751-2980.13260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 04/02/2024]
Abstract
OBJECTIVE To investigate the association between disease location and segmental mucosal healing (SMH) following exclusive enteral nutrition (EEN) in children with Crohn's disease (CD). METHODS Treatment-naive pediatric patients with endoscopically active CD treated with EEN alone as induction therapy were retrospectively enrolled from January 1, 2017 to June 30, 2022. The simple endoscopic score for CD (SES-CD) was employed to score disease activity in the upper gastrointestinal (GI) tract (esophagus, stomach, duodenum), rectum, left colon, transverse colon, right colon, and terminal ileum. While the Lewis score assessed that of the small bowel from the jejunum to the proximal ileum (except the terminal ileum). The variation in the total scores for each segment and SES-CD subscores for each ileocolonic segment from baseline to 1 year after EEN therapy and the segmental endoscopic outcomes and potential predictors associated with SMH for the segments scored by SES-CD were evaluated. RESULTS Overall, 82 children with CD were enrolled. Except for the upper GI segment, scores in other segments declined significantly from baseline to EEN completion (all P < 0.001). We analyzed 486 segments (79, 80, 81, 82, 82 and 82 from upper GI tract, terminal ileum, right colon, transverse colon, left colon, and rectum) and found that the segmental SES-CD at baseline (odds ratio [OR] 0.62, 95% confidence interval [CI] 0.55-0.70, P < 0.001) and upper GI location (OR 0.25, 95% CI 0.11-0.55, P = 0.001) were associated with SMH at EEN completion. CONCLUSION Disease location of the upper GI segment in pediatric CD was associated with SMH following EEN therapy.
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Affiliation(s)
- Wen Juan Tang
- Department of Gastroenterology, Pediatric Inflammatory Bowel Disease Research Center, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Peng Shi
- Department of Medical Statistics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Hai Jiao Xia
- Department of Gastroenterology, Pediatric Inflammatory Bowel Disease Research Center, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Jie Wu
- Department of Gastroenterology, Pediatric Inflammatory Bowel Disease Research Center, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Yu Huan Wang
- Department of Gastroenterology, Pediatric Inflammatory Bowel Disease Research Center, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Ying Huang
- Department of Gastroenterology, Pediatric Inflammatory Bowel Disease Research Center, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
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Arzivian A, Alrubaie A, Yang J, Lin H, Zhang E, Leong R. The Utility of Magnetic Resonance Enterography and Double Balloon Enteroscopy-Assisted Endoscopic Balloon Dilatation for Small Bowel Strictures in Crohn's Disease: A Retrospective Observational Study. Inflamm Intest Dis 2024; 9:147-156. [PMID: 39015256 PMCID: PMC11249593 DOI: 10.1159/000539401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 05/16/2024] [Indexed: 07/18/2024] Open
Abstract
Introduction Crohn's disease (CD) of the small bowel is associated with a severe course and increased risk of complications. Strictures at this location are challenging to diagnose and out-of-reach of colonoscopy. We aimed to evaluate the detection rate of small bowel strictures with magnetic resonance enterography (MRE) and assess the efficacy of double balloon enteroscopy-assisted endoscopic balloon dilatation (DBE-assisted EBD) in managing these strictures. Methods A retrospective study included all patients with DBE-assisted EBD of small bowel strictures in CD in our facility. All patients had MRE to detect strictures prior to the dilatation. Sequential dilatation protocol was performed using through-the-scope (TTS) working channel balloons. The outcomes included technical success defined by the passage of the enteroscope post-dilatation, resolution of symptoms, and the requirement of repeated procedures or surgery during 12 months of follow-up. Results Twenty DBE-assisted EBDs of small bowel strictures were attempted during 13 DBE procedures in 10 patients (6 males, median age 42). MRE identified 75% of the strictures with 100% accuracy in localisation. Retrograde DBE was the approach in 16/20 (80%) strictures. Anaesthetic intubation was used in 8/20 (40%). DBE reached 19/20 strictures. All the reached strictures were dilated successfully; the technical success following dilatation was 72.2%. The median DBE insertion time with TTS balloon dilatation was 66 min. Three patients required follow-up dilatations within 2-3 months. Surgery was not needed during the follow-up period. Conclusions MRE is essential in diagnosing and localising small bowel strictures in CD. DBE reached 95% of strictures with successful dilatation. Immediate technical success was high, and safety was demonstrated. Planned repeat procedures for sequential dilatation were performed in a few patients. Surgical resection was avoided in all patients.
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Affiliation(s)
- Arteen Arzivian
- Endoscopy Unit, Macquarie University Hospital, Sydney, NSW, Australia
| | - Ahmad Alrubaie
- Endoscopy Unit, Macquarie University Hospital, Sydney, NSW, Australia
| | - Jessica Yang
- Macquarie Medical Imaging, Macquarie University Hospital, Sydney, NSW, Australia
| | - Huiyu Lin
- Gastroenterology and Liver Services, Concord Repatriation General Hospital, Sydney, NSW, Australia
| | - Eva Zhang
- Endoscopy Unit, Macquarie University Hospital, Sydney, NSW, Australia
| | - Rupert Leong
- Endoscopy Unit, Macquarie University Hospital, Sydney, NSW, Australia
- Gastroenterology and Liver Services, Concord Repatriation General Hospital, Sydney, NSW, Australia
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Bos S, Lobatón T, De Vos M, Van Welden S, Plekhova V, De Paepe E, Vanhaecke L, Laukens D. A comprehensive metabolite fingerprint of fibrostenosis in patients with Crohn's disease. Sci Rep 2023; 13:23036. [PMID: 38155265 PMCID: PMC10754816 DOI: 10.1038/s41598-023-50461-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 12/20/2023] [Indexed: 12/30/2023] Open
Abstract
Intestinal fibrostenosis in patients with Crohn's disease (CD) is a common and untreatable comorbidity that is notoriously difficult to monitor. We aimed to find metabolites associated with the presence of fibrostenosis in patients with CD using targeted and untargeted metabolomics analyses of serum and primary cell cultures using hyphenated ultra-high performance liquid chromatography high-resolution mass spectrometry. Targeted metabolomics revealed 11 discriminating metabolites in serum, which were enriched within the arginine and proline metabolism pathway. Based on untargeted metabolomics and discriminant analysis, 166 components showed a high predictive value. In addition, human intestinal fibroblasts isolated from stenotic tissue were characterized by differential levels of medium-chain dicarboxylic acids, which are proposed as an energy source through beta-oxidation, when oxidative phosphorylation is insufficient. Another energy providing pathway in such situations is anaerobic glycolysis, a theory supported by increased expression of hexokinase 2 and solute carrier family 16 member 1 in stenotic fibroblasts. Of interest, four (unannotated) metabolic components showed a negative correlation with hexokinase 2 gene expression. Together, this study provides a discriminative metabolic fingerprint in the serum and in intestinal fibroblasts of stenotic and non-stenotic patients with CD suggestive for increased production of building blocks for collagen synthesis and increased glycolysis.
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Affiliation(s)
- Simon Bos
- Department of Internal Medicine and Pediatrics, Ghent University, C. Heymanslaan 10, 0MRB2, 9000, Ghent, Belgium
- VIB Center for Inflammation Research, Ghent, Belgium
| | - Triana Lobatón
- Department of Internal Medicine and Pediatrics, Ghent University, C. Heymanslaan 10, 0MRB2, 9000, Ghent, Belgium
- Department of Gastroenterology, Ghent University Hospital, Ghent, Belgium
| | - Martine De Vos
- Department of Internal Medicine and Pediatrics, Ghent University, C. Heymanslaan 10, 0MRB2, 9000, Ghent, Belgium
- Department of Gastroenterology, Ghent University Hospital, Ghent, Belgium
| | - Sophie Van Welden
- Department of Internal Medicine and Pediatrics, Ghent University, C. Heymanslaan 10, 0MRB2, 9000, Ghent, Belgium
- VIB Center for Inflammation Research, Ghent, Belgium
| | - Vera Plekhova
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Ellen De Paepe
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Lynn Vanhaecke
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
- Institute for Global Food Security, Queen's University, Belfast, Northern Ireland, UK
| | - Debby Laukens
- Department of Internal Medicine and Pediatrics, Ghent University, C. Heymanslaan 10, 0MRB2, 9000, Ghent, Belgium.
- VIB Center for Inflammation Research, Ghent, Belgium.
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Xanthohumol Interferes with the Activation of TGF-β Signaling in the Process Leading to Intestinal Fibrosis. Nutrients 2022; 15:nu15010099. [PMID: 36615756 PMCID: PMC9824381 DOI: 10.3390/nu15010099] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022] Open
Abstract
Fibrosis has various biological processes and affects almost every organ, especially in patients with inflammatory bowel disease, including Crohn's disease, who experience discomfort caused by intestinal fibrosis, which is a problem that needs to be resolved. TGF-β signaling is known to act as a key regulator of intestinal fibrosis, and its modulation could be an excellent candidate for fibrosis therapy. Xanthohumol (XN) has various effects, including anti-inflammation and anti-cancer; however, the detailed mechanism of TGF-β signaling has not yet been studied. The purpose of this study was to investigate the mechanism underlying the anti-fibrotic effect of XN on TGF-β1-induced intestinal fibrosis using primary human intestinal fibroblasts (HIFs). In this study, to check the anti-fibrotic effects of XN on intestinal fibrosis, we assessed the expression of fibrosis-related genes in TGF-β1-stimulated HIFs by qPCR, immunoblotting, and immunofluorescence staining. As a result, XN showed the ability to reduce the expression of fibrosis-associated genes increased by TGF-β1 treatment in HIFs and restored the cell shape altered by TGF-β1. In particular, XN repressed both NF-κB- and Smad-binding regions in the α-SMA promoter, which is important in fibrosis. In addition, XN inhibited NF-κB signaling, including phosphorylated-IkBα and cyclooxygenase-2 expression, and TNF-α-stimulated transcriptional activity of NF-κB. XN attenuated TGF-β1-induced phosphorylation of Smad2 and Smad3, and the transcriptional activity of CAGA. Particularly, XN interfered with the binding of TGF-Receptor I (TβRI) and Smad3 by binding to the kinase domain of the L45 loop of TβRI, thereby confirming that the fibrosis mechanism did not proceed further. In conclusion, XN has an inhibitory effect on TGF-β1-induced intestinal fibrosis in HIFs, significantly affecting TGF-β/Smad signaling.
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Ismail MS, Charabaty A. Management of Crohn's stricture: medical, endoscopic and surgical therapies. Frontline Gastroenterol 2022; 13:524-530. [PMID: 36250181 PMCID: PMC9555137 DOI: 10.1136/flgastro-2021-101827] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 01/21/2022] [Indexed: 02/04/2023] Open
Abstract
Patients with Crohn's disease are at high risk of presenting with or developing a bowel stricture during the course of their disease. The available therapeutic options to manage a symptomatic Crohn's stricture include medical therapy (mainly biologics), surgical resection and endoscopic interventions. The choice of therapeutic modality depends on the clinical presentation of the stricture, the nature of the stricture (inflammatory vs fibrotic, primary vs anastomotic) and its anatomical characteristics on endoscopy and imaging (length, number, location of strictures and severity of obstruction). The aim herein is to provide an overview of the comprehensive assessment of a Crohn's stricture and to review the indications of the different therapeutic modalities, their success rates and their limitations to help clinicians properly evaluate and manage Crohn's strictures.
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Affiliation(s)
- Mohamed Saleh Ismail
- Gastroenterology and Hepatology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Aline Charabaty
- Division of Gastroenterology and Hepatology, Johns Hopkins University, Sibley Memorial Hospital, Washington, District of Columbia, USA
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Narula N, Wong ECL, Dulai PS, Marshall JK, Colombel JF, Reinisch W. Outcomes of Passable and Non-passable Strictures in Clinical Trials of Crohn's Disease: A Post-hoc Analysis. J Crohns Colitis 2021; 15:1649-1657. [PMID: 33693522 DOI: 10.1093/ecco-jcc/jjab045] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIMS There is paucity of evidence on the reversibility of Crohn's disease [CD]-related strictures treated with therapies. We aimed to describe the clinical and endoscopic outcomes of CD patients with non-passable strictures. METHODS This was a post-hoc analysis of three large CD clinical trial programmes examining outcomes with infliximab, ustekinumab, and azathioprine, which included data on 576 patients including 105 with non-passable strictures and 45 with passable strictures, as measured using the Simple Endoscopic Score for Crohn's Disease [SES-CD]. The impact of non-passable strictures on achieving clinical remission [CR] and endoscopic remission [ER] was assessed using multivariate logistic regression models. CR was defined as a Crohn's Disease Activity Index [CDAI] <150, clinical response as a CDAI reduction of ≥100 points, and ER as SES-CD score <3. RESULTS After 1 year of treatment, patients with non-passable strictures demonstrated the ability to achieve passable or no strictures in 62.5% of cases, with 52.4% and 37.5% attaining CR and ER, respectively. However, patients with non-passable strictures at baseline were less likely to demonstrate symptom improvement compared with those with passable or no strictures, with reduced odds of 1-year CR (adjusted odds ratio [aOR] 0.17, 95% CI 0.03-0.99, p = 0.048). No significant differences were observed between patients with non-passable strictures at baseline and those with passable or no strictures in rates of ER [aOR 0.82, 95% CI 0.23-2.85, p = 0.751] at 1 year. CONCLUSIONS Patients with non-passable strictures can achieve symptomatic and endoscopic remission when receiving therapies used to treat CD, although they are less likely to obtain CR compared with patients without non-passable strictures. These findings support the importance of balancing the presence of non-passable strictures in trial arms.
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Affiliation(s)
- Neeraj Narula
- Department of Medicine [Division of Gastroenterology] and Farncombe Family Digestive Health Research Institute, M cmaster University, Hamilton, ON, Canada
| | - Emily C L Wong
- Department of Medicine [Division of Gastroenterology] and Farncombe Family Digestive Health Research Institute, M cmaster University, Hamilton, ON, Canada
| | - Parambir S Dulai
- Division of Gastroenterology, University of California San Diego, La Jolla, CA, USA
| | - John K Marshall
- Department of Medicine [Division of Gastroenterology] and Farncombe Family Digestive Health Research Institute, M cmaster University, Hamilton, ON, Canada
| | - Jean-Frederic Colombel
- Division of Gastroenterology; Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Walter Reinisch
- Department of Internal Medicine III, Division of Gastroenterology and Hepatology, Medical University of Vienna, Vienna, Austria
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Chronic inflammation and other changes are significant components of clinically fibrotic strictures in Crohn's disease: a histological study of resected strictures clinically characterized as noninflamed. Eur J Gastroenterol Hepatol 2020; 32:1432-1439. [PMID: 32639416 DOI: 10.1097/meg.0000000000001796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Strictures related to Crohn's disease due to fibrosis are a result of an exaggerated tissue remodelling response to inflammation, characterized by accumulation of collagen-rich extracellular matrix produced by mesenchymal cells. OBJECTIVES The objective of this study was to characterize histological changes seen in resected 'fibrotic' strictures to better understand individual components of intestinal stenosis. METHODS We identified patients undergoing surgery for ileal Crohn's disease secondary to symptomatic stricturing disease (Montreal B2) using the histopathology database at Queen Elizabeth Hospital in Birmingham, UK, between 2012 and 2017. Phenotypic data were recorded and resection specimens reviewed. Two independent pathologists applied the semiquantitative scoring system previously developed by us to the microscopic images. Data were analyzed using the possible maximum total score (%PMTS). RESULTS Forty-eight patients (M = 25) were included. with median disease duration of 7 years (range 0.25-39 years); nearly two-thirds had ileocolonic distribution (L3). In this cohort, despite presurgery diagnosis of noninflamed fibrosis, chronic inflammation was noted to be a prominent component of all strictures. The histological scoring showed presence of several other prominent findings such as muscular hyperplasia and volume expansion.There was statistically significant positive correlation between chronic inflammation and fibrosis and muscular hyperplasia. CONCLUSION The histological features of Crohn's disease-related strictures show multiple changes in multiple layers and not simply fibrosis. In our cohort, despite the observation prior to surgery that strictures were clinically considered fibrotic, the finding of chronic inflammation as a dominant component at a histological level in the resection is important. The findings might suggest that one of the main drivers of progressive fibrosis is the inflammatory component, which probably is never fully resolved.
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Grass F, Fletcher JG, Alsughayer A, Petersen M, Bruining DH, Bartlett DJ, Mathis KL, Lightner AL. Development of an Objective Model to Define Near-Term Risk of Ileocecal Resection in Patients with Terminal Ileal Crohn Disease. Inflamm Bowel Dis 2019; 25:1845-1853. [PMID: 31050733 DOI: 10.1093/ibd/izz079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND The decision to either escalate medical therapy or proceed to ileocecal resection (ICR) in patients with terminal ileal Crohn disease (CD) remains largely subjective. We sought to develop a risk score for predicting ICR at 1 year from computed tomography or magnetic resonance enterography (CTE/MRE). METHODS We conducted a retrospective cohort study including all consecutive adult (> 18 years) patients with imaging findings of terminal ileal CD (Montreal classification: B1, inflammatory predominant; B2, stricturing; or B3, penetrating) on CTE/MRE between January 1, 2016, and December 31, 2016. The risk for ICR at 6 months and at 1 year of CTE/MRE and risk factors associated with ICR, including demographics, CD-specific immunosuppressive therapeutics, and disease presentation at the time of imaging, were determined. RESULTS Of 559 patients, 121 (21.6%) underwent ICR during follow-up (1.4 years [IQR 0.21-1.64 years]); the risk for ICR at 6 months and at 1 year was 18.2% (95% CI 14.7%-21.6%) and 20.5% (95% CI 16.8%-24.1%), respectively. Multivariable analysis revealed Montreal classification (B2, hazard ratio [HR] 2.73, and B3, HR 6.80, both P < 0.0001), upstream bowel dilation (HR 3.06, P < 0.0001), and younger age (19-29 years reference, 30-44 years, HR 0.83 [P = 0.40]; 45-59 years, HR 0.58 [P = 0.04], and 60+ years, HR 0.45 [P = 0.01]) to significantly increase the likelihood of ICR. A predictive nomogram for interval ICR was developed based on these significant variables. CONCLUSIONS The presence of CD strictures, penetrating complications, and upstream bowel dilation on CTE/MRE, combined with young age, significantly predict ICR. The suggested risk model may facilitate objective therapeutic decision-making.
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Affiliation(s)
- Fabian Grass
- Department of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Joel G Fletcher
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Ahmad Alsughayer
- Department of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Molly Petersen
- Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, USA
| | - David H Bruining
- Department of Gastroenterology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Kellie L Mathis
- Department of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Amy L Lightner
- Department of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
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Li J, Mao R, Kurada S, Wang J, Lin S, Chandra J, Rieder F. Pathogenesis of fibrostenosing Crohn's disease. Transl Res 2019; 209:39-54. [PMID: 30981697 DOI: 10.1016/j.trsl.2019.03.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 03/07/2019] [Accepted: 03/21/2019] [Indexed: 02/06/2023]
Abstract
Crohn's disease (CD) is a chronic inflammatory disease, which could affect any part of the gastrointestinal tract. A severe complication of CD is fibrosis-associated strictures, which can cause bowel obstruction. Unfortunately, there is no specific antifibrotic therapy available. More than 80% of the patients with CD will have to undergo at least 1 surgery in their life and recurrence of strictures after surgery is common. Investigations on the mechanism of fibrostenosing CD have revealed that fibrosis is mainly driven by expansion of mesenchymal cells including fibroblasts, myofibroblasts, and smooth muscle cells. Being exposed to a pro-fibrotic milieu, these cells increase the secretion of extracellular matrix, as well as crosslinking enzymes, which drive tissue stiffness and remodeling. Fibrogenesis can become independent of inflammation in later stages of disease, which offers unique therapeutic potential. Exciting new evidence suggests smooth muscle cell hyperplasia as a strong contributor to luminal narrowing in fibrostenotic CD. Approval of new drugs in other fibrotic diseases, such as idiopathic pulmonary fibrosis, as well as new targets associated with fibrosis found in CD, such as cadherins or specific integrins, shed light on the development of novel antifibrotic approaches in CD.
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Affiliation(s)
- Jiannan Li
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Ren Mao
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Satya Kurada
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Jie Wang
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio; School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Sinan Lin
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jyotsna Chandra
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Florian Rieder
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio.
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Rieder F, Bettenworth D, Ma C, Parker CE, Williamson LA, Nelson SA, van Assche G, Di Sabatino A, Bouhnik Y, Stidham RW, Dignass A, Rogler G, Taylor SA, Stoker J, Rimola J, Baker ME, Fletcher JG, Panes J, Sandborn WJ, Feagan BG, Jairath V. An expert consensus to standardise definitions, diagnosis and treatment targets for anti-fibrotic stricture therapies in Crohn's disease. Aliment Pharmacol Ther 2018; 48:347-357. [PMID: 29920726 PMCID: PMC6043370 DOI: 10.1111/apt.14853] [Citation(s) in RCA: 159] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 04/19/2018] [Accepted: 05/26/2018] [Indexed: 12/30/2022]
Abstract
BACKGROUND Fibrotic stricture is a common complication of Crohn's disease (CD) affecting approximately half of all patients. No specific anti-fibrotic therapies are available; however, several therapies are currently under evaluation. Drug development for the indication of stricturing CD is hampered by a lack of standardised definitions, diagnostic modalities, clinical trial eligibility criteria, endpoints and treatment targets in stricturing CD. AIM To standardise definitions, diagnosis and treatment targets for anti-fibrotic stricture therapies in Chron's disease. METHODS An interdisciplinary expert panel consisting of 15 gastroenterologists and radiologists was assembled. Using modified RAND/University of California Los Angeles appropriateness methodology, 109 candidate items derived from systematic review and expert opinion focusing on small intestinal strictures were anonymously rated as inappropriate, uncertain or appropriate. Survey results were discussed as a group before a second and third round of voting. RESULTS Fibrotic strictures are defined by the combination of luminal narrowing, wall thickening and pre-stenotic dilation. Definitions of anastomotic (at site of prior intestinal resection with anastomosis) and naïve small bowel strictures were similar; however, there was uncertainty regarding wall thickness in anastomotic strictures. Magnetic resonance imaging is considered the optimal technique to define fibrotic strictures and assess response to therapy. Symptomatic strictures are defined by abdominal distension, cramping, dietary restrictions, nausea, vomiting, abdominal pain and post-prandial abdominal pain. Need for intervention (endoscopic balloon dilation or surgery) within 24-48 weeks is considered the appropriate endpoint in pharmacological trials. CONCLUSIONS Consensus criteria for diagnosis and response to therapy in stricturing Crohn's disease should inform both clinical practice and trial design.
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Affiliation(s)
- Florian Rieder
- Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute; Department of Pathobiology, Lerner Research Institute; Cleveland Clinic Foundation, Cleveland, OH, USA
| | | | - Christopher Ma
- Division of Gastroenterology, University of Calgary, Calgary, AB, Canada,Robarts Clinical Trials Inc., University of Western Ontario, London, ON, Canada
| | - Claire E. Parker
- Robarts Clinical Trials Inc., University of Western Ontario, London, ON, Canada
| | - Lee A. Williamson
- Robarts Clinical Trials Inc., University of Western Ontario, London, ON, Canada
| | - Sigrid A. Nelson
- Robarts Clinical Trials Inc., University of Western Ontario, London, ON, Canada
| | - Gert van Assche
- Department of Gastroenterology and Hepatology, University Hospitals Leuven, KU Leuven, Leuven, Belgium
| | - Antonio Di Sabatino
- First Department of Internal Medicine, San Matteo Hospital Foundation, University of Pavia, Pavia, Italy
| | - Yoram Bouhnik
- Department of Gastroenterology, Beaujon Hospital, Assistance Publique-Hôpitaux de Paris, Université Paris VII, Clichy, France
| | - Ryan W. Stidham
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan Health System, Ann Arbor, MI, USA
| | - Axel Dignass
- Department of Medicine I, Agaplesion Markus Hospital, Frankfurt, Germany
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University of Zürich, Zürich, Switzerland
| | - Stuart A. Taylor
- Center for Medical Imaging, University College London, London, UK
| | - Jaap Stoker
- Department of Radiology and Nuclear Medicine, Academic Medical Center, Amsterdam, The Netherlands
| | - Jordi Rimola
- Department of Radiology, Centre de Diagnòstic per la Imatge (CDI), Hospital Clínic Barcelona, University of Barcelona, Barcelona, Catalonia, Spain
| | - Mark E. Baker
- Imaging Institute/L10, Cleveland Clinic, Cleveland, OH, USA
| | | | - Julian Panes
- Institut d’Investigacions Biomèdiques August Pi i Sunyer-Hospital Clínic Barcelona, Barcelona, Catalonia, Spain
| | - William J. Sandborn
- Robarts Clinical Trials Inc., University of Western Ontario, London, ON, Canada,Division of Gastroenterology, University of California San Diego, La Jolla, CA, USA
| | - Brian G. Feagan
- Robarts Clinical Trials Inc., University of Western Ontario, London, ON, Canada,Department of Medicine, University of Western Ontario, London, ON, Canada,Department of Epidemiology and Biostatistics, University of Western Ontario, London, ON, Canada
| | - Vipul Jairath
- Robarts Clinical Trials Inc., University of Western Ontario, London, ON, Canada,Department of Medicine, University of Western Ontario, London, ON, Canada,Department of Epidemiology and Biostatistics, University of Western Ontario, London, ON, Canada
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12
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Danese S, Bonovas S, Lopez A, Fiorino G, Sandborn WJ, Rubin DT, Kamm MA, Colombel JF, Sands BE, Vermeire S, Panes J, Rogler G, D'Haens G, Peyrin-Biroulet L. Identification of Endpoints for Development of Antifibrosis Drugs for Treatment of Crohn's Disease. Gastroenterology 2018; 155:76-87. [PMID: 29601825 DOI: 10.1053/j.gastro.2018.03.032] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 02/20/2018] [Accepted: 03/19/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND & AIMS Intestinal fibrosis is a challenge to management of patients with Crohn's disease (CD); there is an urgent need to expedite development of antifibrosis drugs for this disease. The International Organization for the Study of Inflammatory Bowel Disease (IOIBD) aimed to identify a set of endpoints that can be used to determine efficacy of antifibrosis agents tested in clinical trials of patients with CD. METHODS We conducted a systematic review to identify clinical, radiologic, biochemical, endoscopic, and composite endpoints used in assessing activity of fibrostenosing CD and response to treatment, and determined their operational properties. A panel of IOIBD experts performed a consensus process to identify the best endpoints for inclusion in clinical trials, through a 2-round, Delphi-style online survey. RESULTS A total of 36 potentially relevant endpoints for intestinal fibrosis were selected and assessed. Forty-eight physicians with expertise in inflammatory bowel disease, from 5 regions (North America, Europe, Middle East, Asia/Pacific, and Latin America), participated in the Delphi consensus process. A core set of 13 endpoints (complete clinical response, long-term efficacy, sustained clinical benefit, treatment failure, radiological remission, normal quality of life, clinical remission without steroids, therapeutic failure, deep remission, complete absence of occlusive symptoms, symptom-free survival, bowel damage progression, and no disability) were rated as critical. Agreement was high among the experts. CONCLUSIONS Members of the IOIBD reached expert consensus on a set of endpoints that can be used to assess antifibrosis agents in trials of patients with CD. Studies are needed to clarify methods for measuring these outcomes and validate measurement instruments.
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Affiliation(s)
- Silvio Danese
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; IBD Center, Humanitas Clinical and Research Center, Milan, Italy.
| | - Stefanos Bonovas
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; IBD Center, Humanitas Clinical and Research Center, Milan, Italy
| | - Anthony Lopez
- Department of Hepato-Gastroenterology and Inserm U954, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France
| | - Gionata Fiorino
- IBD Center, Humanitas Clinical and Research Center, Milan, Italy
| | | | | | - Michael A Kamm
- Departments of Gastroenterology and Medicine, St Vincent's Hospital and University of Melbourne, Melbourne, Australia
| | - Jean-Frederic Colombel
- Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Bruce E Sands
- Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Severine Vermeire
- Department of Gastroenterology, University Hospitals Leuven, Leuven, Belgium
| | - Julian Panes
- Hospital Clínic de Barcelona, IDIBAPS, CIBERehd, Barcelona, Spain
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | | | - Laurent Peyrin-Biroulet
- Department of Hepato-Gastroenterology and Inserm U954, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France
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13
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Chan WPW, Mourad F, Leong RW. Crohn's disease associated strictures. J Gastroenterol Hepatol 2018; 33:998-1008. [PMID: 29427364 DOI: 10.1111/jgh.14119] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/23/2018] [Accepted: 01/25/2018] [Indexed: 12/13/2022]
Abstract
Crohn's disease (CD) is a chronic relapsing and remitting disease that can affect any segments of the gastrointestinal tract. More than 50% of patients with CD develop stricturing or penetrating complications within the first 10 years after diagnosis. Strictures can lead to intestinal obstruction, which is a common indication for surgery. Despite significant advances in the understanding of the pathogenesis of intestinal fibrostenosis, imaging and therapeutic armamentarium of CD, the risk of intestinal surgery remained significantly high. Endoscopic balloon dilation is a promising first-line alternative to surgery as it is less invasive and could preserve intestinal length. In this review, we will evaluate the literature on the mechanism of intestinal fibrosis, emerging imaging techniques, and management strategies for CD associated strictures.
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Affiliation(s)
- Webber Pak Wo Chan
- Gastroenterology and Liver Services, Concord Repatriation General Hospital, Sydney, New South Wales, Australia.,Department of Gastroenterology and Hepatology, Singapore General Hospital, Singapore
| | - Fadi Mourad
- Gastroenterology and Liver Services, Concord Repatriation General Hospital, Sydney, New South Wales, Australia
| | - Rupert Wl Leong
- Gastroenterology and Liver Services, Concord Repatriation General Hospital, Sydney, New South Wales, Australia
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14
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Shi Y, Zhou J, Jiang B, Miao M. Resveratrol and inflammatory bowel disease. Ann N Y Acad Sci 2017; 1403:38-47. [PMID: 28945937 DOI: 10.1111/nyas.13426] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 05/31/2017] [Accepted: 06/07/2017] [Indexed: 12/19/2022]
Abstract
Inflammatory bowel disease (IBD) is a chronic inflammatory disease of the gastrointestinal tract, comprising ulcerative colitis (UC) and Crohn's disease (CD). Progression of IBD leads to long-term impairment of intestinal structure and function. The pathogenesis of IBD is complex, involving environmental, immunological, genetic, microbial, and psychological factors. The conventional therapies and many existing biopharmaceuticals for IBD have limited efficacy or adverse effects. As a promising safe and effective therapy for IBD, resveratrol has been studied widely, as it has shown anti-inflammatory and antioxidant activity. Resveratrol's mechanism of action involves multiple immune responses and signaling pathways; it is absorbed quickly and metabolized into various derivatives. However, the poor water solubility and low bioavailability of resveratrol limit its clinical applications. Further research should attempt to improve the stability and oral bioavailability of resveratrol by modification and various delivery systems.
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Affiliation(s)
- Yaning Shi
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, P. R. China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Jie Zhou
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, P. R. China
| | - Bo Jiang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
| | - Ming Miao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, P. R. China
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15
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Suzuki K, Yoneyama H. New endoscopic approach of anti-fibrotic therapy for inflammatory bowel disease. ANNALS OF TRANSLATIONAL MEDICINE 2017; 5:191. [PMID: 28616406 DOI: 10.21037/atm.2017.03.65] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Fibrosis continues to be paid a great attention in not only basic research but also clinical practice, especially for the development of novel therapeutics in various fibrotic diseases. However, there remain several obstacles to translation in developing anti-fibrosis therapy. The present review documents our translational practice from target discovery to first-in-patient studies in the development of anti-fibrosis therapy for inflammatory bowel disease (IBD). First topic is a target selection. We have focused on the target that has an ability to regulate multifactorial cascades of fibrosis. Carbohydrate sulfotransferase 15 (CHST15) synthesizes matrix proteoglycan that regulates various pathogenic mediators and contributes to tissue remodeling during injury. Small interfering RNA (siRNA) targeting CHST15 inhibited activation of fibroblasts in vitro and reduced fibrosis in vivo. Second topic is a clinically feasible application. We established a safe and novel pancolonic delivery of siRNA, which is achieved by direct injection to extracellular matrix (ECM) through endoscope. Third topic is an endpoint for both nonclinical and clinical studies. We have focused on tissue-specific findings for co-existence of fibrosis in ulcerative lesions in IBD and investigated whether the balance of mucosal healing (MH) and fibrosis, which is evaluated by endoscopy and histology respectively, can be used for study endpoints. Phase 1 clinical trial of STNM01, a synthesized CHST15 siRNA, by a single dose endoscopic submucosal injection for non-healer patients with Crohn's disease showed high rates of MH. Analyses of biopsy specimens revealed that STNM01 reduced CHST15 expression at local lesions, repressed pre-existing fibrosis and repaired the damaged crypts. Thus, blockade of multifactorial modulator CHST15 in ECM showed a potential to treat tissue remodeling and skew fibrosis toward mucosal repair. Our practice suggests that target- and tissue-specific findings-based strategy would be a key to translation in developing anti-fibrosis therapy.
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Affiliation(s)
- Kenji Suzuki
- Department of Gastroenterology, Niigata University Medical and Dental Hospital, Niigata, Japan.,Niigata University Health and Welfare, Niigata, Japan
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