Publications by authors named "Andrea van der Meulen-de Jong"

Objective: Inflammatory bowel disease (IBD), encompassing Crohn's disease and ulcerative colitis, impose an escalating burden on healthcare systems globally, with a rising prevalence contributing to increased costs. This study explored healthcare utilisation patterns and its drivers amongst IBD patients in an outpatient clinic.

Methods: A longitudinal cohort study was conducted at a Dutch academic teaching hospital.

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Background: Fecal microbiota transplantation (FMT) is an experimental treatment for ulcerative colitis (UC). We aimed to study microbial families associated with FMT treatment success.

Methods: We analyzed stools from 24 UC patients treated with four FMTs weekly after randomization for pretreatment during three weeks with budesonide (n = 12) or placebo (n = 12).

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Background: Perianal fistulas are a debilitating complication of Crohn's disease (CD). Due to unknown reasons, CD-associated fistulas are in general more difficult to treat than cryptoglandular fistulas (non-CD-associated). Understanding the immune cell landscape is a first step towards the development of more effective therapies for CD-associated fistulas.

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Article Synopsis
  • In the LADI trial, researchers found that extending adalimumab (ADA) dosing intervals was just as effective as standard dosing for Crohn's disease patients in remission.
  • The study aimed to create a prediction model to identify patients who could successfully increase their dosing intervals based on trial data.
  • Results showed that 60.6% of patients successfully extended their dosing, with certain factors (like smoking and prior surgeries) making success less likely; the model's effectiveness needs further external validation before clinical use.
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Background: Faecal microbiota transplantation [FMT] shows some efficacy in treating patients with ulcerative colitis [UC], although variability has been observed among donors and treatment regimens. We investigated the effect of FMT using rationally selected donors after pretreatment with budesonide or placebo in active UC.

Methods: Patients ≥18 years old with mild to moderate active UC were randomly assigned to 3 weeks of budesonide [9 mg] or placebo followed by 4-weekly infusions of a donor faeces suspension.

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Background: No previous study has investigated fatigue in older patients with Inflammatory Bowel Disease (IBD).

Aims: To describe the prevalence of fatigue in older patients and compare it to the prevalence in younger patients with IBD, and to determine factors associated with fatigue.

Methods: A prospective, multicenter cohort study, including older- (≥ 65 years) and younger patients with IBD (18-64 years).

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Introduction: Iron deficiency anaemia (IDA) is the most common systemic manifestation of inflammatory bowel disease (IBD) that has detrimental effects on quality of life (QoL) and disease outcomes. Iron deficiency (ID), with or without anaemia, poses a diagnostic and therapeutic challenge in patients with IBD due to the multifactorial nature of ID(A) and its frequent recurrence. Elevated hepcidin-a systemic iron regulator that modulates systemic iron availability and intestinal iron absorption-has been associated with oral iron malabsorption in IBD.

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Introduction: Since the number of medical treatment options for Ulcerative Colitis (UC) has expanded over the last decades, patients and physicians face challenges regarding decisions about the medication options. We aimed to identify patients' preferences about their UC treatment options in the Netherlands. Furthermore, we assessed after how many failed treatment options, patients are willing to consider surgical treatment.

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Introduction: Traditional iron parameters often fail to distinguish the cause of iron-restricted anemia in patients without an obvious underlying cause. We evaluated whether an oral iron absorption test (OIAT) and hepcidin measurement could be useful diagnostic tests in these patients.

Methods: We retrospectively analyzed data extracted from medical records of all patients who underwent an OIAT and hepcidin measurement, noting subsequent clinical diagnosis.

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Background And Aims: Our goals were to study frailty screening in association with hospitalization and decline in quality of life [QoL] and functional status in older patients with inflammatory bowel diseases [IBD].

Methods: This was a prospective multicentre cohort study in IBD patients ≥65 years old using frailty screening [G8 Questionnaire]. Outcomes were all-cause, acute, and IBD-related hospitalization, any infection, any malignancy, QoL [EQ5D-3L], and functional decline (Instrumental Activities of Daily Living [IADL]) during 18 months of follow-up.

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Introduction: The prognostic value of the modified Rutgeerts score (mRS) in patients with Crohn's disease (CD) needs to be further elucidated. This study assessed the prognostic value of the mRS for long-term outcomes after primary ileocecal resection in patients with CD.

Methods: Patients with CD after primary ileocecal resection with an available mRS at first postoperative ileocolonoscopy (index mRS) were retrospectively included.

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Background And Aims: Prior studies on the effect of smoking on the risk of colitis-associated colorectal neoplasia (CRN) have reported conflicting results. We aimed to further elucidate the association between smoking, including possible dose-effects, and the development of colorectal neoplasia in patients with inflammatory bowel disease (IBD).

Methods: We performed a prospective multicenter cohort study including patients with colonic IBD enrolled in a surveillance program in four academic hospitals between 2011 and 2021.

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Article Synopsis
  • The study aimed to evaluate the cost-effectiveness of lengthening adalimumab dosing intervals for patients with Crohn's disease who are in stable remission, compared to the standard two-week interval.
  • A total of 174 patients participated, with results showing no significant difference in overall quality of life and total costs between the extended interval and control groups, although medication costs were lower in the extended group.
  • Increased dosing intervals were deemed cost-effective if the value of a quality-adjusted life year is below €53,960, suggesting that for higher valuations, the conventional dosing remains more favorable.
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We report a patient with a 5-year diagnosis of akinetic-rigid Parkinson's disease under treatment with Levodopa-Carbidopa Intestinal Gel therapy through a PEG-J tube due to motor complications, in which, in the context of a clinical study, we successfully and safely administered fecal microbiota transplant through a PEG-J.

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BACKGROUNDDue to their immunoregulatory and tissue regenerative features, mesenchymal stromal cells (MSCs) are a promising novel tool for the management of ulcerative proctitis (UP). Here we report on a phase IIa clinical study that evaluated the impact of local MSC therapy on UP.METHODSThirteen refractory UP patients, with an endoscopic Mayo score (EMS) of 2 or 3, were included.

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Objective: It is unknown whether ustekinumab (UST) levels can predict clinical outcomes in Crohn's disease (CD) patients. We assessed the exposure-response relationship of UST trough concentrations with biochemical outcomes at week 24 in a prospective, real-world setting.

Methods: We performed a prospective study in patients with CD starting UST in four academic centres in the Netherlands.

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Background: Patients with inflammatory bowel disease (IBD) are at an increased risk of developing infection (CDI). Treatment of CDI in patients with IBD is challenging due to higher failure rates and concomitant IBD activity.

Objectives: We performed a multicentre cohort study in patients with IBD who received fecal microbiota transplantation (FMT) for recurrent CDI (rCDI), to further investigate factors that influence the clinical outcome and course of both rCDI and IBD.

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Background: Hepcidin, the systemic iron regulator, could be critical in differentiating iron deficiency (ID) from functional iron restriction in inflammatory bowel disease (IBD). We assessed hepcidin as a diagnostic ID marker and explored the relationship between hepcidin and its regulators in patients with IBD undergoing induction therapy with infliximab (IFX) or vedolizumab (VEDO).

Methods: Patients with active IBD receiving induction therapy with IFX or VEDO were included.

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Article Synopsis
  • The LADI study investigated the effects of extending adalimumab dosing intervals in stable Crohn's disease patients compared to conventional 2-week dosing, focusing on clinical outcomes and the risk of infections.
  • Patients in the intervention group increased their dosing to every 3 weeks and then possibly to every 4 weeks, while the control group maintained the 2-week schedule.
  • The primary measure of effectiveness was the incidence of persistent disease flare-ups over 48 weeks, with a specific non-inferiority margin of 15% for comparing outcomes.
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Perianal fistulas are defined as pathological connections between the anorectal canal and the perianal skin. Most perianal fistulas are cryptoglandular fistulas, which are thought to originate from infected anal glands. The remainder of the fistulas mainly arises as complications of Crohn's disease (CD), trauma, or as a result of malignancies.

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Background: Iron deficiency (ID) and anemia in patients with Inflammatory Bowel Disease (IBD) are associated with a reduced quality of life. We assessed the prevalence of ID and anemia in Dutch outpatients with IBD and compared routine ID(A) management among medical professionals to the European Crohn’s and Colitis Organisation (ECCO) treatment guidelines. Methods: Between January and November 2021, consecutive adult outpatients with IBD were included in this study across 16 Dutch hospitals.

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Inflammatory bowel disease (IBD) is a chronic relapsing inflammation of the intestinal tract with currently not well-understood pathogenesis. In addition to the involvement of immune cells, increasing studies show an important role for fibroblasts in the pathogenesis of IBD. Previous work showed that glycolysis is the preferred energy source for fibroblasts in fibrotic diseases.

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Background: Tofacitinib is an oral Janus kinase (JAK) inhibitor and is registered for the treatment of ulcerative colitis (UC). The effectiveness of tofacitinib has been evaluated up to 12 months of treatment.

Aim: The aim of this study was to assess the effectiveness and safety of 24 months of tofacitinib use in UC patients in the Netherlands.

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Locally applied mesenchymal stromal cells (MSCs) have the capacity to promote the healing of perianal fistulas in Crohn's disease (CD) and are under clinical development for the treatment of proctitis in ulcerative colitis (UC). Despite these clinical advances, the mechanism of action of local MSC therapy in inflammatory bowel disease (IBD) is largely unknown. We hypothesized that the local cytokine environment in IBD patients affects the immunomodulatory properties of MSCs.

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Chronic intestinal inflammation underlies inflammatory bowel disease (IBD). Previous studies indicated alterations in the cellular immune system; however, it has been challenging to interrogate the role of all immune cell subsets simultaneously. Therefore, we aimed to identify immune cell types associated with inflammation in IBD using high-dimensional mass cytometry.

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