Publications by authors named "Lahat A"

Crohn's disease (CD) and Ankylosing Spondylitis (AS) are chronic conditions with overlapping inflammatory pathways. This research investigates the genetic association between AS and the requirement for more aggressive therapeutic interventions in CD, suggesting a likelihood of increased severity in CD progression among individuals diagnosed with AS. This study utilized two-sample Mendelian randomization (TSMR) to analyze GWAS datasets for AS and CD requiring second-line treatment.

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Background: Gastrointestinal perforations have been reported in a small number of rheumatoid arthritis (RA) patients treated with Janus kinase (JAK) inhibitors in clinical trials. However, large-scale postmarketing data repositories are needed to further investigate this potentially rare but serious adverse event.

Methods: A retrospective, pharmacovigilance study of the FDA adverse event reporting system (July 2014 to September 2023) assessing the reporting of gastrointestinal perforations following JAK inhibitors compared to biological disease-modifying antirheumatic drugs (bDMARDs) in RA patients.

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Background And Objective: The objective of this study was to characterize the effects of risankizumab on the pharmacokinetics of cytochrome P450 (CYP) 1A2, CYP2C9, CYP2C19, CYP2D6, and CYP3A substrates in patients with moderately to severely active Crohn's disease (CD) or ulcerative colitis (UC) using a cocktail approach.

Methods: Patients with CD or UC (n = 20) received single doses of probe substrates for CYP1A2 (caffeine 100 mg), CYP2C9 (warfarin 10 mg), CYP2C19 (omeprazole 20 mg), CYP2D6 (metoprolol 50 mg), and CYP3A (midazolam 2 mg) before and after intravenous infusions of risankizumab 1800 mg once every 4 weeks for four doses. Serial blood samples were collected for determination of concentrations of the CYP probe drugs and metabolites with and without risankizumab.

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Background: Small bowel video capsule endoscopy (SB-VCE) assesses mucosal inflammation in Crohn's disease (CD), while intestinal ultrasound (IUS) examines transmural involvement. We aimed to correlate SB-VCE with IUS in evaluating active CD and monitoring treatment response over time.

Methods: Patients with active SB-CD who initiated biologics were prospectively followed with fecal calprotectin (FC), SB-VCE, and IUS at baseline and after 14 and 52 weeks.

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Background: Inflammatory bowel disease (IBD) encompasses chronic gastrointestinal disorders characterized by recurrent inflammation. Achieving mucosal healing and preventing disease progression are primary treatment goals.

Objectives: This study aimed to compare disease characteristics, medication utilization, procedures performed, and hospitalizations between IBD patients treated in hospital and community settings using the Leumit Health Service database.

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Background And Aims: Fecal calprotectin (FC) is known to be a sensitive biomarker of colonic inflammation but to a lesser degree of small bowel (SB) inflammation. Moreover, data on FC's diagnostic levels in different SB segments are scarce. We aimed to examine FC's diagnostic levels along the SB axis in CD.

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Article Synopsis
  • Celiac disease is an autoimmune disorder triggered by gluten, and this study examines its potential genetic connections to other inflammatory diseases like asthma and eczema.
  • Using a method called two-sample Mendelian randomization, researchers analyzed data from various genetic studies and found weak associations between celiac disease and conditions like atopic dermatitis and asthma.
  • While the study found some statistically significant correlations, the practical effects are minimal, suggesting that these connections might not have important clinical implications and further research may not be necessary right now.
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Background: Sedation increases colonoscopy risks and prolongs recovery time. We examined whether virtual reality (VR) can substitute for sedation. The primary outcome was the overall satisfaction of patients who underwent colonoscopy with VR headset compared with patients who underwent standard sedation.

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: Colonoscopy is a critical diagnostic and therapeutic procedure in gastroenterology. However, it carries risks, including hypoxemia, which can impact patient safety. Understanding the factors that contribute to the incidence of severe hypoxemia, specifically the role of procedure duration, is essential for improving patient outcomes.

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Background: Artificial intelligence, particularly chatbot systems, is becoming an instrumental tool in health care, aiding clinical decision-making and patient engagement.

Objective: This study aims to analyze the performance of ChatGPT-3.5 and ChatGPT-4 in addressing complex clinical and ethical dilemmas, and to illustrate their potential role in health care decision-making while comparing seniors' and residents' ratings, and specific question types.

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Background & Aims: CT-P13 subcutaneous (SC), an SC formulation of the intravenous (IV) infliximab biosimilar CT-P13 IV, creates a unique exposure profile. The LIBERTY studies aimed to demonstrate superiority of CT-P13 SC vs placebo as maintenance therapy in patients with Crohn's disease (CD) and ulcerative colitis (UC).

Methods: Two randomized, placebo-controlled, double-blind studies were conducted in patients with moderately to severely active CD or UC and inadequate response or intolerance to corticosteroids and immunomodulators.

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Objectives: The ORAL Surveillance trial, a postmarketing safety clinical trial, found an increased risk of adverse cardiovascular events and venous thromboembolism (VTE) in patients treated with Janus Kinase (JAK) inhibitors compared to tumor necrosis factor (TNF) inhibitors. However, additional studies yielded mixed results and data on other JAK inhibitors are limited.

Methods: A retrospective, pharmacovigilance study using the FDA adverse event reporting system (FAERS) to assess reporting of adverse cardiovascular events following treatment with JAK inhibitors in rheumatoid arthritis (RA) patients between January 2015 and June 2023.

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Background And Aims: Pan-enteric capsule endoscopy (PillCam Crohn's capsule [PCC]) is a useful tool in diagnosing and monitoring Crohn's disease [CD]. Eliakim score [ES] reliability and its strong correlation to Lewis score [LS] and to inflammatory biomarkers have been previously demonstrated using PCC in quiescent CD. We aimed to examine ES performance in active CD and its responsiveness to clinical/biochemical change over time.

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Background: Ankylosing spondylitis (AS) and inflammatory bowel disease (IBD) are chronic conditions with overlapping pathogenic mechanisms. The genetic predisposition and inflammatory pathways common to both diseases suggest a syndemic relationship. While some evidence points to a connection between the two conditions, other reports do not support this link.

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Article Synopsis
  • - The spliceosomal protein PRPF8's carboxy-terminus mutation is linked to retinitis pigmentosa-type 13, but its specific role in human splicing and tissue-specificity is not well understood.
  • - Using patient-derived stem cells with a specific PRPF8 mutation, researchers observed retinal cell defects like photoreceptor loss and ciliary issues, highlighting retinal-specific endophenotypes.
  • - Detailed analyses showed that PRPF8 influences spliceosome function, affecting 5'-splice site selection and leading to splicing abnormalities, which could provide insights for future therapeutic strategies for retinal diseases.
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Gastrointestinal practices, especially endoscopy, have a substantial environmental impact, marked by notable greenhouse gas emissions and waste generation. As the world struggles with climate change, there emerges a pressing need to re-evaluate and reform the environmental footprint within gastrointestinal medicine. The challenge lies in finding a harmonious balance between ensuring clinical effectiveness and upholding environmental responsibility.

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Background: The skin-gut axis, characterized by bidirectional communication between the skin and gut, plays a crucial role in the pathogenesis of psoriasis and inflammatory bowel diseases (IBD).

Objectives: We aimed to explore the association between psoriasis and IBD and identify predictors associated with IBD development among patients with psoriasis.

Design: Retrospective cohort study.

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Background: The integration of artificial intelligence (AI) into healthcare has opened new avenues for enhancing patient care and clinical research. In gastroenterology, the potential of AI tools, specifically large language models like ChatGPT, is being explored to understand their utility and effectiveness.

Objectives: The primary goal of this systematic review is to assess the various applications, ascertain the benefits, and identify the limitations of utilizing ChatGPT within the realm of gastroenterology.

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Article Synopsis
  • The study focuses on the diagnostic accuracy of non-invasive tests for Helicobacter pylori infection in the elderly population, a group that shows lower sensitivity in such tests.
  • A systematic review and meta-analysis of eight studies revealed the effectiveness of the Urea Breath Test (UBT) and stool antigen test (HpSA) compared to serology, with UBT showing the highest sensitivity and specificity.
  • The findings suggest that these tests are reliable options for diagnosing H. pylori in older patients, especially those not needing endoscopy, which should be considered by healthcare professionals.
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Background: Gastric cancer (GC), a significant health burden worldwide, is typically diagnosed in the advanced stages due to its non-specific symptoms and complex morphological features. Deep learning (DL) has shown potential for improving and standardizing early GC detection. This systematic review aims to evaluate the current status of DL in pre-malignant, early-stage, and gastric neoplasia analysis.

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Article Synopsis
  • Coeliac disease impacts about 1% of the global population, and diagnosing it typically involves invasive and lengthy procedures; deep learning technology presents a promising non-invasive alternative.
  • A systematic review of existing research on deep-learning applications in coeliac disease diagnosis was conducted, examining its effectiveness and potential areas for further improvement.
  • Out of 417 initial studies, only eight were deemed suitable, with deep-learning techniques showing diagnostic accuracy between 84% and 95.94%, highlighting the potential benefits while acknowledging challenges that need to be addressed.
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Background: The link between ankylosing spondylitis (AS) and inflammatory bowel disease (IBD) is well-established, with concurrent prevalence estimates ranging from 5-10%. However, there are still significant gaps in our understanding, and a comprehensive treatment guideline for these co-diagnosed patients has yet to be established. Our objective was to explore patterns of treatment alterations following the diagnosis of AS in patients previously diagnosed with IBD, and vice versa.

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Due to its apparent efficacy and safety, dupilumab, a monoclonal antibody that blocks Interleukin 4 (IL-4) and Interleukin 13 (IL-13), has been approved for treating T-helper 2 (Th2) disorders. However, adverse effects like local injection site reactions, conjunctivitis, headaches, and nasopharyngitis have been reported. Sex differences are known to influence both adaptive and innate immune responses and, thus, may have a bearing on the occurrence of these adverse effects.

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Celiac disease (CD) presents a complex interplay of both innate and adaptive immune responses that drive a variety of pathological manifestations. Recent studies highlight the role of immune-mediated pathogenesis, pinpointing the involvement of antibodies against tissue transglutaminases (TG2, TG3, TG6), specific HLA molecules (DQ2/8), and the regulatory role of interleukin-15, among other cellular and molecular pathways. These aspects illuminate the systemic nature of CD, reflecting its wide-reaching impact that extends beyond gastrointestinal symptoms to affect other physiological systems and giving rise to a range of pathological landscapes, including refractory CD (RCD) and, in severe cases, enteropathy-associated T cell lymphoma.

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