Publications by authors named "Mathurin Flamant"

Background: Discrepancies between symptoms and endoscopy exist in patients with ulcerative colitis (UC). Most studies focused on patient-reported outcomes-2 rather than their overall perception of disease activity.

Objectives: The objectives were to assess the concordance between the patient global assessment (PtGA) and the endoscopic evaluation, to analyse the factors associated with agreement and to describe the concordance between the patient's and the physician's perception of UC activity.

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  • The study focuses on SB5, an adalimumab biosimilar approved in Europe in 2017, and aims to gather real-world data on its usage and effectiveness in patients with various immune-mediated inflammatory diseases (IMIDs).
  • Researchers analyzed clinical and healthcare claims data from the French national healthcare database to assess patient persistence on SB5 after 12 months.
  • Among 911 patients treated with SB5, notable remission rates were observed at the 12-month mark, particularly in naïve patients, across various conditions such as rheumatoid arthritis and Crohn's disease, with all showing significant improvement from baseline.
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  • This pilot study aimed to see if confocal laser endoscopy (CLE) can help identify certain cells (α4β7- and TNF-expressing) that could predict how well ulcerative colitis patients respond to the drug vedolizumab.
  • Nineteen patients with moderate-to-severe ulcerative colitis participated, and 58% showed clinical and endoscopic improvement after treatment, with specific staining patterns indicating potential responders versus non-responders.
  • The findings suggest that positive α4β7 staining detected through CLE could be linked to better treatment outcomes, although blood tests and immune cell counts did not correlate with patient responses.
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  • SB5 is an EMA-approved biosimilar to adalimumab, showing similar efficacy, safety, and bioequivalence in treating Crohn's disease and ulcerative colitis.
  • The PERFUSE study involved 406 patients across France, collecting patient-reported outcome measures (PROMs) to evaluate training satisfaction and its impact on treatment persistence over 12 months.
  • Results indicated that training was more frequently provided to naïve patients, who showed higher treatment persistence and satisfaction compared to pre-treated patients, suggesting early questionnaires can help identify those at risk of discontinuing treatment.
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Background: No study has performed a face-to-face comparison of biologics after the failure of the first anti-TNF agent in patients with Crohn's disease (CD). The aim of the study was to compare the efficacy of biologics in this setting.

Methods: Patients with CD who were refractory to a first anti-TNF agent, and treated with ustekinumab (UST), vedolizumab (VDZ), or a second anti-TNF drug as a second-line biological agent at 10 French tertiary centres from 2013 to 2019 were retrospectively included in this study.

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Background: Owing to growing number of therapeutic options with similar efficacy and safety, we compared the acceptability of therapeutic maintenance regimens in inflammatory bowel disease (IBD).

Methods: From a nationwide study (24 public or private centers), IBD patients were consecutively included for 6 weeks. A dedicated questionnaire including acceptability numerical scales (ANS) ranging from 0 to 10 (highest acceptability) was administered to both patients and related physicians.

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Background: In PURSUIT, golimumab (GLM) was efficacious in patients with moderate-to-severe ulcerative colitis (UC). We assessed whether remote monitoring of combined patient-reported Mayo stool frequency and rectal bleeding scores is an effective real-world outcome measure for assessing maintenance of GLM-induced clinical response.

Methods: This was a 54-week prospective, observational cohort study conducted at 43 European outpatient clinics in adults with moderate-to-severe UC who were biologic naïve or had received a maximum of one other biological therapy.

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Computer-aided diagnostic tools using deep neural networks are efficient for detection of lesions in endoscopy but require a huge number of images. The impact of the quality of annotation has not been tested yet. Here we describe a multi-expert annotated dataset of images extracted from capsules from Crohn's disease patients and the impact of the quality of annotations on the accuracy of a recurrent attention neural network.

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Background And Aims: Inflammatory bowel diseases [IBD] are disabling disorders. The IBD-Disability Index [IBD-DI] was developed for quantifying disability in IBD patients but is difficult to use. The IBD-Disk is a visual adaptation of the IBD-DI.

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  • Colon cancer stem cells (CSCs) may initiate tumors and lead to cancer relapse, and their behavior is influenced by neighboring enteric glial cells (EGCs) within the tumor microenvironment.
  • The research used various cancer models to show that EGCs, when activated by tumor-derived signals, promote the growth and tumorigenicity of CSCs through a specific signaling pathway involving PGE2 and EGFR.
  • The study suggests that targeting the interaction between tumor-activated EGCs and CSCs could be a potential strategy for cancer treatment.
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Background & Aims: Few data are available on the effects of tumor necrosis factor (TNF) antagonist therapy for patients with internal fistulizing Crohn's disease (CD) and there is debate regarding the risk of abscess. We aimed to assess the long-term efficacy and safety of anti-TNF therapy for patients with internal fistulas.

Methods: We performed a retrospective study of data collected from the Groupe d'Etude Thérapeutique des Affections Inflammatoires Digestives trial, from January 1, 2000, through December 31, 2017.

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Background: Proactive therapeutic drug monitoring (TDM) to titrate tumor necrosis factor (TNF) antagonists has emerged recently as a tool to routinely monitor drug concentration to achieve target levels in patients with quiescent inflammatory bowel disease (IBD).

Methods: The purpose of the present review article was to present available data exploring the concept of proactive TDM.

Results: While several observational studies have identified an association between proactive TDM and better IBD outcomes, 2 randomized controlled studies did not confirm this advantage.

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The management of inflammatory bowel disease (IBD) has been transformed over the last two decades by the arrival of tumor necrosis factor (TNF) antagonist agents. Recently, alternative drugs have been approved, directed at leukocyte-trafficking molecules (vedolizumab) or other inflammatory cytokines (ustekinumab). New therapeutics are currently being developed in IBD and represent promising targets as they involve other mechanisms of action (JAK molecules, Smad 7 antisense oligonucleotide etc.

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Background: Objective control of intestinal inflammation during inflammatory bowel disease (IBD) is becoming the main driver for medical treatment. However, the monitoring tools-related burden remains poorly investigated. We aimed to evaluate their comparative acceptability and utility according to patients with IBD.

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Inflammatory bowel disease (IBD) is caused by a dysregulation of the immune system, inducing the production of proinflammatory cytokines and adhesion molecules. A better understanding of the mucosal immune response in IBD has led to the development of new drugs directed at inflammatory cytokines and leukocyte-trafficking molecules. Beyond tumor necrosis factor antagonists and anti-integrin molecules, which act by blocking the interaction between gut-specific lymphocytes and their receptor on vascular endothelium, the Janus kinase/signal transducer and activator of transcription (JAK/STAT) signaling pathway represents a new target in IBD.

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Tumor necrosis factor antagonists have revolutionized the therapeutic management of inflammatory bowel disease. Infliximab and adalimumab were the first biological agents used to induce and maintain remission in ulcerative colitis. More recently, a third tumor necrosis factor antagonist, golimumab, was approved, extending the therapeutic approach for moderate-to-severe ulcerative colitis.

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Aim: to describe the characteristics of incident cases of tuberculosis [TB] despite negative TB screening tests, in patients with inflammatory bowel disease [IBD] undergoing anti-TNF treatment, and to identify the risk factors involved.

Methods: A retrospective descriptive study was conducted at GETAID centers on all IBD patients undergoing anti-TNF treatment who developed TB even though their initial screening test results were negative. The following data were collected using a standardized anonymous questionnaire: IBD, and TB characteristics and evolution, initial screening methods and results, and time before anti-TNF treatment was restarted.

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In recent years, many retrospective studies have demonstrated the interest of therapeutic anti-TNF drug monitoring in inflammatory bowel disease. This could be especially helpful in two different situations: a secondary loss of anti-TNF response where a re-elevation of drug levels by treatment optimization is predictive of better clinical outcome; a therapeutic de-escalation or discontinuation for Crohn's disease patients in long-standing remission where an undetectable anti-TNF drug level could be predictive of clinical remission.

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Article Synopsis
  • Crohn's disease (CD) patients exhibit dysbiosis, showing lower levels of beneficial gut bacteria like Firmicutes compared to healthy individuals, which may increase their risk of clinical relapse after stopping treatment.
  • Dysbiosis is particularly pronounced in patients who relapse, with specific low levels of Faecalibacterium prausnitzii and Bacteroides being significant predictors of relapse, regardless of inflammation markers like C reactive protein.
  • These findings suggest that restoring a balanced gut microbiota could be an important strategy for managing CD and preventing relapses.
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Background: Small bowel capsule endoscopy is the most sensitive technique for the detection of lesions in the small intestine. The aims of the study were to assess the prevalence and clinical significance of jejunal lesions detected by small bowel capsule endoscopy in patients with an established Crohn's disease.

Results: One hundred and eight patients, including 32 patients with ileal disease, 25 patients with colonic disease, and 51 patients with ileocolonic disease, underwent small bowel capsule endoscopy, and findings were analyzed retrospectively.

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Routine colonic biopsies allow the detection of alpha-synuclein aggregates in the enteric nervous system (ENS) in living Parkinson's disease (PD) patients. Whether the ENS is affected by alpha-synuclein pathology in multiple system atrophy (MSA) has not been studied yet. The aim of the present research was therefore to analyze colonic biopsies in MSA for the presence of alpha-synuclein pathology.

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