Publications by authors named "Iris Dotan"

Background And Aims: Cross sectional imaging is an integral part of evaluating disease activity and complications in Crohn's disease. There remains a need to develop guidance that may be for both clinical trials and clinical practice. This initiative aimed to develop consensus statements for definitions of response and remission, transmural healing, optimal timing for assessing, and evaluation of treatment efficacy in patients with Crohn's disease using magnetic resonance enterography (MRE) in clinical trials and clinical practice.

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Introduction: The gut microbiome in Crohn's disease (CD) shows variability and conflicting associations with disease activity. We aimed to assess microbial and clinical trajectories in newly diagnosed CD (ndCD) over 1 year.

Methods: This prospective longitudinal inception cohort study followed treatment-naive patients with ndCD for 1 year.

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Optical imaging and single-molecule imaging, in particular, utilize fluorescent tags in order to differentiate observed species by color. The degree of color multiplexing is dependent on the available spectral detection window and the ability to distinguish between fluorophores of different colors within this window. Consequently, most single-molecule imaging techniques rely on two to four colors for multiplexing.

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Objectives: In this nationwide study, we used the epi-Israeli Inflammatory Bowel Disease (IBD) Research Nucleus (IIRN) validated cohort to explore the utility of routine blood tests as markers predicting IBD occurrence years before diagnosis.

Methods: We included all health maintenance organization (HMO)-insured IBD patients in Israel diagnosed during 2005-2020 to identify discriminative results of blood tests performed up to 15 years before diagnosis. Each patient was individually matched to two non-IBD controls.

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Background & Aims: No fully validated indices to measure pouchitis activity exist. We aimed to develop and externally validate a novel endoscopic and histologic index.

Methods: Endoscopists and pathologists used 11 (4 endoscopic, 4 histologic, 3 composite) existing indices and items from a prior Research and Development/University of California Los Angeles appropriateness exercise to assess pouchitis disease activity in videos and images from 98 patients with chronic antibiotic-refractory pouchitis who participated in a randomized placebo-controlled alicaforsen trial.

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: Ultra-processed food (UPF) intake, particularly that of industrial breads rich in food additives (FAs) like emulsifiers, has been linked to higher risk of inflammatory bowel diseases (IBD). Here, we screened the ingredients and FAs used in the bread industry and reviewed their potential biological effects. : We consecutively screened breads available at supermarket and health food store chains in Israel.

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Background & Aims: The diagnosis and management of ileocolonic Crohn's disease are well-established. In contrast, standardized guidance pertaining to the diagnosis and management of upper gastrointestinal Crohn's disease (UGICD) is lacking, despite its potentially severe consequences. This comprehensive systematic review describes the prevalence, clinical presentation, and medical and surgical management of involvement of the upper GI tract in adult patients with Crohn's disease.

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Background: In this nationwide study, we aimed to explore healthcare services utilization, medical management, and disease outcomes of inflammatory bowel diseases (IBD) across the 2 major ethnic groups in Israel.

Methods: We utilized a cohort including all patients diagnosed with IBD in Israel since 2005. The primary outcome was steroid dependency, with secondary outcomes including use of biologics, time to surgery, and hospitalizations.

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During the twentieth century, inflammatory bowel disease (IBD) was considered a disease of early industrialized regions in North America, Europe and Oceania. At the turn of the twenty-first century, IBD incidence increased in newly industrialized and emerging regions in Africa, Asia and Latin America, while the prevalence in early industrialized regions continued to grow steadily. Changes in the incidence and prevalence denote the evolution of IBD across four epidemiologic stages: stage 1 (emergence), characterized by low incidence and prevalence; stage 2 (acceleration in incidence), marked by rapidly rising incidence and low prevalence; and stage 3 (compounding prevalence), where the incidence decelerates, plateaus or declines while the prevalence steadily increases.

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Inflammatory bowel disease (IBD) is a growing global health challenge affecting more than 7 million people worldwide. With increasing prevalence across all age groups, including children and adolescents, IBD places substantial strain on health-care systems and society, resulting in high direct medical costs, lost productivity and reduced quality of life. Despite therapeutic advances, suboptimal disease control and delays in timely diagnosis and adequate treatment persist.

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Therapeutic progress in inflammatory bowel disease (IBD) has hitherto focused on reducing inflammation to minimise long-term complications. However, strategies aimed at preventing IBD and attenuating its disease course are particularly appealing. This concept is derived from accumulating evidence for an "at-risk" preclinical state and the associations linking genetic background and numerous environmental exposures to disease pathogenesis.

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Background & Aims: Optimal treat-to-target strategies for Crohn's disease (CD) are still being sought. The value of video capsule endoscopy (VCE) to guide proactive treat-to-target optimization in CD was examined.

Methods: A randomized controlled trial of patients with small bowel-involved (L1/L3) CD in corticosteroid-free clinical remission (Crohn's Disease Activity Index < 150).

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Background & Aims: In this nationwide cohort from Israel (Epi-IIRN), we aimed to characterize risks for age-related complications, mortality, and inflammatory bowel disease (IBD)-related surgeries in patients with elderly-onset IBD (EO-IBD).

Methods: Data of patients with EO-IBD (≥65 years) diagnosed during 2005 to 2020 were retrieved from the epi-IIRN database. Patients with EO-IBD were compared with 3 age-, sex-, and district-matched non-IBD individuals, for age-related outcomes.

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Background And Aims: Over 10% of patients with Crohn's disease require permanent ileostomy. We aimed to summarize the existing data on diagnosis, definitions of recurrence, and management of Crohn's disease patients with permanent ileostomy.

Methods: MEDLINE, Embase, and CENTRAL databases were searched from inception to February 6, 2024.

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Background: Fecal microbiota transplantation (FMT) is emerging as a potential treatment modality for individuals living with inflammatory bowel disease (IBD). Despite its promise, the effectiveness of FMT for treating IBD, particularly for ulcerative colitis (UC), still requires thorough clinical investigation. Notwithstanding differences in methodologies, current studies demonstrate its potential for inducing remission in UC patients.

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Background & Aims: The efficacy and safety of extended treatment with risankizumab (RZB), an anti-interleukin-23 p19 monoclonal antibody, were evaluated in patients with moderate to severe Crohn's disease (CD) who did not achieve clinical response to 12 weeks (W) RZB induction treatment ('initial nonresponders').

Methods: Initial nonresponders to intravenous (IV) RZB induction (600 mg or 1200 mg at W0, W4, and W8) were rerandomized 1:1:1 to receive extended blinded RZB treatment (1200 mg IV at W12, W16, and W20, or subcutaneous [SC] 180 mg or 360 mg at W12 and W20). Patients with clinical response to SC RZB at W24 ('delayed responders') continued their dose in FORTIFY.

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Background: Therapeutic drug monitoring is important for optimizing anti-tumor necrosis factor-α (TNF-α) therapy in inflammatory bowel disease. However, the exposure-response relationship has never been assessed in pouchitis.

Aims: To explore associations between anti-TNF-α drug concentration and pouchitis disease activity in patients with a background of ulcerative colitis.

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Background & Aims: To decipher the mechanisms underlying the protective role of the Mediterranean diet (MED) in Crohn's disease (CD), we explored the implications of adherence to MED on CD course, inflammatory markers, and microbial and metabolite composition.

Methods: Patients with newly diagnosed CD were recruited and followed prospectively. MED adherence was assessed by repeated food frequency questionnaires (FFQs) using a predefined inflammatory bowel disease Mediterranean diet score (IBDMED score), alongside validated MED adherence screeners.

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Background: Patients with ulcerative colitis (UC) undergoing proctocolectomy and ileal pouch-anal anastomosis (IPAA) may eventually require biologic therapy. Factors associated with biologic therapy after IPAA have not been previously studied.

Methods: All patients with UC after total proctocolectomy and IPAA who were followed at Rabin Medical Center comprehensive pouch clinic and who consented to prospective observational follow-up were included.

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Background And Aim: Endoscopic ultrasound (EUS) is the most sensitive method for evaluation of pancreatic lesions but is limited by significant operator dependency. Artificial intelligence (AI), in the form of computer-aided detection (CADe) systems, has shown potential in increasing accuracy and bridging operator dependency in several endoscopic domains. However, the complexity of integrating AI into EUS is far more challenging.

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Article Synopsis
  • The study investigates the effects of GLP-1 analogs, commonly used for diabetes and obesity, on patients with inflammatory bowel diseases (IBD).
  • Data was collected from over 3,700 patients with both IBD and diabetes, revealing that those treated with GLP-1 analogs had better health outcomes, reducing the risk of complications.
  • The findings highlight a stronger protective effect in obese patients compared to non-obese patients, suggesting a need for further research on mechanisms and broader applicability of GLP-1 analogs.
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Objectives: Elderly hospitalized patients with inflammatory bowel disease (IBD) flare and concurrent Clostridioides difficile infection (CDI) are considered at high risk of IBD-related complications. We aimed to evaluate the short-,intermediate-, and long-term post-discharge complications among these patients.

Methods: A retrospective multicenter cohort study assessing outcomes of elderly individuals (≥60 years) hospitalized for an IBD flare who were tested for CDI (either positive or negative) and discharged.

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Article Synopsis
  • * The most common outcomes assessed were clinical outcomes like remission and response (50.6%), with others including biomarkers, patient-reported outcomes, and safety measures, illustrating a shift towards more comprehensive evaluations using composite outcomes.
  • * Findings from the review will contribute to prioritizing key domains for developing a multi-component outcome measure in future CD research, highlighting the complexity and multidimensional nature of the disease.
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Introduction: Complicated perianal disease (cPD) may be the sole presentation of Crohn's disease (CD). The role of small-bowel capsule endoscopy (SBCE) in the diagnostic algorithm of cPD is unclear. We aimed to evaluate the role of SBCE as a diagnostic tool, in patients with cPD, after a negative standard workup for CD.

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Article Synopsis
  • A nationwide study assessed the link between high eosinophil counts (PBE) and long-term outcomes in patients with inflammatory bowel diseases (IBD).
  • The analysis included over 28,000 patients, revealing that PBE occurred more frequently in individuals with ulcerative colitis and in pediatric patients compared to adults.
  • Results indicated that PBE is a significant predictor of severe disease progression, increased hospitalization, and higher medication needs in IBD patients, highlighting its potential as a marker for adverse outcomes and target for therapies.
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