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1.
Acta Paediatr ; 2024 Feb 23.
Article in English | MEDLINE | ID: mdl-38391047

ABSTRACT

AIM: Novel technologies offer insights into the potential role of the intestinal microbiota in human health and disease. Dysbiosis has been associated with several diseases, and it is thought to play a role in the pathogenesis of different gastrointestinal diseases. Faecal microbiota transplantation (FMT) is emerging as a method to modulate the gastrointestinal microbial ecosystem. While recurrent Clostridioides difficile infection is the recognised FMT indication, exploration of other therapeutic uses is ongoing. METHODS: Following PRISMA guidelines, we conducted a systematic review, extracting 583 articles from Embase and PubMed (index date to October 2022). RESULTS: The search yielded 58 studies for full review, with 50 included in the systematic review. Articles were categorised by FMT indication, study design, efficacy, adverse events, donor selection and administration route. FMT appears safe and effective for recurrent Clostridioides difficile infection, although severe adverse events are reported in children. However, there are currently insufficient data to support the use of FMT for other potential therapeutic indications (such as irritable or inflammatory bowel disease or obesity), beside the potential to decolonise multi-drug resistant organisms. CONCLUSION: This underscores the need for randomised, controlled, prospective cohort studies in children to assess FMT effectiveness in diverse conditions and counteract publication bias.

2.
Acta Paediatr ; 113(5): 861-870, 2024 May.
Article in English | MEDLINE | ID: mdl-38389122

ABSTRACT

AIM: Paediatric patients with high-output ileostomies (HOI) face an elevated risk of complications. This study aimed to comprehensively review the existing literature and offer nutritional management recommendations for paediatric patients with an HOI. METHODS: PubMed and Embase were searched for relevant English or French language papers up to 31 June 2022. The emphasis was placed on studies involving paediatric ileostomy patients, but insights were obtained from adult literature and other intestinal failure pathologies when these were lacking. RESULTS: We identified 16 papers that addressed nutritional issues in paediatric ileostomy patients. Currently, no evidence supports a safe paediatric HOI threshold exceeding 20 mL/kg/day on two consecutive days. Paediatric HOI patients were at risk of dehydration, electrolyte disturbances, micronutrient deficiencies and growth failure. The primary dietary choice for neonates is bolus feeding with breastmilk. In older children, an enteral fluid restriction should be installed favouring isotonic or slightly hypotonic glucose-electrolyte solutions. A diet that is high in calories, complex carbohydrates and proteins, low in insoluble fibre and simple carbohydrates, and moderate in fat is recommended. CONCLUSION: Adequate nutritional management is crucial to prevent complications in children with an HOI. Further research is needed to establish more evidence-based guidelines.


Subject(s)
Diet , Ileostomy , Adult , Infant, Newborn , Child , Humans , Ileostomy/adverse effects , Energy Intake , Carbohydrates , Electrolytes
3.
J Pediatr Gastroenterol Nutr ; 78(1): 95-104, 2024 Jan.
Article in English | MEDLINE | ID: mdl-38291690

ABSTRACT

OBJECTIVES: While higher infliximab (IFX) trough concentrations (TCs) are associated with better outcomes in patients with inflammatory bowel disease (IBD), they could pose a risk for adverse events (AEs), including IFX-induced skin lesions. Therefore, we studied correlations between IFX TCs and occurrence of AEs in paediatric IBD patients. METHODS: In this single-centre study, all children with Crohn's disease (CD) and ulcerative colitis (UC) receiving IFX maintenance therapy who underwent proactive drug monitoring between March 2015 and August 2022 were included. IFX doses/intervals/TCs and patient characteristics were systematically registered, as well as AEs and skin lesions appearance. RESULTS: A total of 109 patients (72 CD and 37 UC) contributed 2913 IFX TCs. During a median follow-up of 3.0 [1.5-4.5] years, we observed 684 AEs in 101 patients and 49 skin lesions in 35 patients. There was no significant difference (p = .467) in median TCs between patients with and without skin lesions. However, higher median IFX doses were associated with an increased hazard rate of skin lesions [HR 1.084 (1.024-1.148), p = .005], in addition to female sex [2.210 (1.187-5.310), p = .016] and diagnosis of CD [1.695 (1.241-1.877), p = .011]. Considering IFX therapeutic TC cut-offs of 5.0 and 9.0 µg/mL, there was no significant difference in AE rate (p = .749 and p = .833, respectively). Also, no significant association between IFX doses and AE rate (p = .159). CONCLUSIONS: Increasing the IFX dose to achieve therapeutic TCs may not increase the overall risk of AEs in paediatric IBD patients. However, concerns arise regarding the risk of skin lesions, especially in female CD patients.


Subject(s)
Colitis, Ulcerative , Crohn Disease , Inflammatory Bowel Diseases , Skin Diseases , Humans , Female , Child , Tumor Necrosis Factor Inhibitors/therapeutic use , Gastrointestinal Agents/adverse effects , Remission Induction , Inflammatory Bowel Diseases/drug therapy , Infliximab/adverse effects , Crohn Disease/drug therapy , Colitis, Ulcerative/drug therapy , Skin Diseases/chemically induced , Skin Diseases/drug therapy , Risk Factors
4.
Neurogastroenterol Motil ; 35(9): e14620, 2023 09.
Article in English | MEDLINE | ID: mdl-37288616

ABSTRACT

OBJECTIVES: Functional dyspepsia (FD) is a heterogeneous functional gastrointestinal disorder (FGID) with a highly prevalent symptom complex. The aim of our study is to investigate the relation between symptoms of FD and results of gastric emptying (GE) breath test in children. METHODS: This study included patients (6-17 years old) presented at the general gastroenterology outpatient clinic with dyspeptic symptoms (Rome IV criteria) and underwent careful history taking with clinical examination. A GE breath test with a 13 C-octanoic acid labeled (250 kcal) solid meal was performed and dyspepsia symptom scores, clarified using pictograms for postprandial fullness, bloating, belching, nausea, vomiting, epigastric pain and burning, were obtained every 15 min ranging from 0 to 4 for a total of 240 min. The severity of the complaints (overall and individual symptoms) as displayed by the symptom questionnaire was compared between normal and delayed GE groups. The relationship between GE time and the severity of FD symptoms was assessed using Mann-Whitney test. RESULTS: Thirty nine FD patients (55% girls; mean age: 11.9 ± 3.3 years) participated in the study. Of these, 43% had delayed GE. The overall symptom severity in patients with delayed GE was similar to the symptoms of patients with a normal GE rate (149.5 ± 12.7 points vs. 123.9 ± 9.0; p = 0.19). Individual symptoms scores showed only nausea to be significantly increased in the group with delayed GE (21.5 ± 1.9 points vs. 33.2 ± 4.6; p = 0.048, p < 0.1). CONCLUSION: Especially in children with nausea as presenting symptom of FD, a low threshold should be withheld to perform a GE breath test.


Subject(s)
Dyspepsia , Gastroparesis , Female , Humans , Child , Adolescent , Male , Dyspepsia/diagnosis , Nausea/diagnosis , Abdominal Pain/diagnosis , Vomiting
5.
J Crohns Colitis ; 17(6): 896-908, 2023 Jun 16.
Article in English | MEDLINE | ID: mdl-36661279

ABSTRACT

BACKGROUND AND AIMS: Adequate infliximab concentrations during induction treatment are predictive for deep remission [corticosteroid-free clinical and endoscopic remission] at 6 months in children with inflammatory bowel diseases [IBD]. Under standard infliximab induction dosing, children often have low infliximab trough concentrations. Model-informed precision dosing [MIPD; i.e. model-based therapeutic drug monitoring] is advocated as a promising infliximab dosing strategy. We aimed to develop and validate an MIPD framework for guiding paediatric infliximab induction treatment. METHODS: Data from 31 children with IBD [4-18 years] receiving standard infliximab induction dosing (5 mg/kg at week [w]0, w2 and w6) were repurposed. Eight paediatric population pharmacokinetic models were evaluated. Modelling and simulation were used to identify exposure targets, identify an optimal sampling strategy, and develop a multi-model prediction algorithm for implementation into an MIPD software tool. A role for infliximab clearance monitoring was evaluated. RESULTS: A 7.5 mg/L infliximab concentration target at w12 was associated with 64% probability of deep remission at 6 months. With standard dosing, less than 80% of simulated children <40 kg attained this target. The w12 target was most accurately and precisely achieved by implementing MIPD at w6 using the w6 infliximab concentration [rapid assay required]. The multi-model algorithm outperformed single models when optimizing the w6 dose based on both w2 and w4 concentrations. MIPD using only the w2 concentration resulted in biased and imprecise predictions. Infliximab clearances at w6 and w12 were predictive for deep remission. CONCLUSIONS: A freely available, multi-model MIPD tool facilitates infliximab induction dosing and improves deep remission rates in children with IBD.


Subject(s)
Gastrointestinal Agents , Inflammatory Bowel Diseases , Child , Humans , Infliximab , Gastrointestinal Agents/therapeutic use , Inflammatory Bowel Diseases/drug therapy , Remission Induction , Drug Monitoring/methods
6.
J Gastroenterol ; 57(9): 619-629, 2022 09.
Article in English | MEDLINE | ID: mdl-35834005

ABSTRACT

As extra-intestinal manifestations (EIMs) are frequent in inflammatory bowel disease (IBD) and affect morbidity and sometimes even mortality, vigilance in the surveillance of EIMs and installing the appropriate treatment are essential. Data on renal manifestations in patients with IBD are however rare. Nevertheless, up to 5-15% of adult patients with IBD will develop chronic kidney disease over time. The pathophysiology of renal involvement in patients with IBD is complex and poorly understood, with a wide range of renal disorders affecting the glomeruli and/or the tubular structure. Furthermore, medication used to treat IBD can be potentially nephrotoxic and metabolic complication due to the disease itself can furthermore cause renal damage. The aim of this systematic review is to provide an overview of the existing data in literature on these renal manifestations and complications in patients with IBD.


Subject(s)
Inflammatory Bowel Diseases , Adult , Humans , Inflammatory Bowel Diseases/drug therapy
7.
J Pediatr ; 240: 150-157.e4, 2022 01.
Article in English | MEDLINE | ID: mdl-34481805

ABSTRACT

OBJECTIVES: To study infliximab (IFX) pharmacokinetics in children with inflammatory bowel disease (IBD) during induction therapy to predict outcome and explore if other covariates influenced outcome. STUDY DESIGN: All children with IBD starting IFX therapy (5 mg/kg at weeks 0, 2, 6, and 12) for active luminal disease from May 2017 to May 2019 were included and followed prospectively. Patients were sampled at multiple timepoints during induction (trough concentrations and peak concentration at weeks 0, 2, 6, and 12, and intermediate concentration at weeks 1-4). IFX concentrations and cumulative drug exposure were correlated with outcome at 6 months. Endoscopic remission was defined as Simple Endoscopic Score for Crohn's Disease of <3 or Mayo endoscopic subscore of 0, and deep remission as endoscopic with clinical remission (Pediatric Ulcerative Colitis Activity Index/Pediatric Crohn's Disease Activity Index of <10). RESULTS: There were 252 serum induction concentrations obtained from 32 patients (81% on concomitant thiopurines). Children in endoscopic remission (all in deep remission) at 6 months had significantly higher drug concentrations from week 4 onward. A receiver operating characteristics curve analysis identified IFX trough concentrations at week 12 of ≥5.0 µg/mL and area under the curve at weeks 0-12 of ≥4056.0 µg∗day/mL as the minimal target to achieve endoscopic remission at 6 months (area under the receiver operating characteristics curve, 0.796 [95% CI, 0.62-0.97] and area under the receiver operating characteristics curve, 0.778 [95% CI, 0.61-0.94], respectively). In addition, our findings suggest that proteomic analysis may help to understand IFX response. CONCLUSIONS: Higher IFX exposure during induction therapy in pediatric patients with IBD is associated with significantly better endoscopic and deep remission rates at 6 months. Drug concentrations differentiate remitters from nonremitters from week 4 after induction onward.


Subject(s)
Endoscopy, Digestive System , Gastrointestinal Agents/blood , Inflammatory Bowel Diseases/drug therapy , Infliximab/blood , Remission Induction , Adolescent , Child , Child, Preschool , Drug Monitoring , Female , Follow-Up Studies , Gastrointestinal Agents/therapeutic use , Humans , Infliximab/therapeutic use , Male , Prospective Studies
8.
Paediatr Drugs ; 22(5): 449-461, 2020 Oct.
Article in English | MEDLINE | ID: mdl-32797366

ABSTRACT

Thiopurines have been widely used to maintain steroid-free remission in children with inflammatory bowel disease (IBD). However, within the expanding treatment armamentarium, the role of these non-selective immunomodulators has been questioned, especially in pediatric patients, who often present with a more aggressive disease course, which can impact growth and development. The less favorable safety but also inferior efficacy profile associated with thiopurines, in contrast to the newer biological therapies, has interfered with their use. The future place of thiopurines in the management of childhood IBD, therefore, needs revisiting. This review provides a practical overview on the historical and current use of thiopurines in pediatric IBD with specific attention for thiopurine S-methyltransferase testing and monitoring of thiopurine metabolite levels as an approach to improve outcomes. We also give a personal expert opinion on the future role of these drugs in childhood IBD.


Subject(s)
Biological Products/therapeutic use , Immunologic Factors/therapeutic use , Inflammatory Bowel Diseases/drug therapy , Purines/therapeutic use , Thionucleosides/therapeutic use , Child , Drug Therapy, Combination , Humans , Immunologic Factors/adverse effects , Purines/adverse effects , Thionucleosides/adverse effects
9.
Dig Liver Dis ; 52(2): 164-172, 2020 02.
Article in English | MEDLINE | ID: mdl-31640916

ABSTRACT

OBJECTIVES: In the era where new biologicals are entering the market, the place of immunomodulators in the treatment of pediatric inflammatory bowel disease (IBD) needs to be reassessed. METHODS: All children with Crohn's disease (CD) or ulcerative colitis (UC) followed at our center over the last 10 years were reviewed. Children who received conventional therapy (including 5-aminosalicylates, steroids, thiopurines and methotrexate) since diagnosis were included. Primary outcome was steroid-free clinical remission without need for rescue therapy (biologics or surgery) at 6 and 12 months after diagnosis and at last follow-up. Cox proportional hazard modelling was performed to determine variables at diagnosis associated with outcomes. RESULTS: In total, 176 IBD patients (121 CD, 55 UC) were identified with a median follow-up of 4.6 [2.0-8.1] years. Remission rates were 79.6% at month 6, but decreased to 60.2% at month 12, and 31.8% at last follow-up. Higher CRP [1.006 (1.001-1.011)], lower albumin [1.050 (1.012-1.086)] and growth impairment [1.214 (1.014-1.373)] in CD patients and higher PUCAI score [1.038 (1.006-1.072)] and low iron [1.023 (1.003-1.043)] in UC patients were associated with treatment failure (all p < 0.05). CONCLUSION: Only 32% pediatric IBD patients will remain free of biologics or surgery 5-years after diagnosis. Especially children with a high disease burden at diagnosis were more likely to fail conventional therapy.


Subject(s)
Colitis, Ulcerative/drug therapy , Crohn Disease/drug therapy , Immunologic Factors/therapeutic use , Adolescent , Biological Products/therapeutic use , Child , Female , Humans , Male , Proportional Hazards Models , Retrospective Studies , Severity of Illness Index , Treatment Outcome
10.
Ther Drug Monit ; 41(3): 317-324, 2019 06.
Article in English | MEDLINE | ID: mdl-30633088

ABSTRACT

BACKGROUND: Rising evidence demonstrates that there are no differences in efficacy and safety between infliximab (IFX) originator and IFX biosimilar CT-P13 in the treatment of inflammatory bowel diseases (IBDs). However, most data are derived from adult patients, and data on pharmacokinetics are limited. The authors evaluated long-term IFX trough levels, immunogenicity, and remission rates in children with IBD who switched from IFX originator to biosimilar CT-P13. METHODS: In this single-center study, all children with Crohn disease and ulcerative colitis receiving maintenance IFX therapy were switched from originator to biosimilar CT-P13. Demographics, disease activity indices, and IFX drug levels were collected from 6 months before (baseline) till 6 months after switching to CT-P13. All data are presented as median (interquartile range). RESULTS: A total of 42 children (26 Crohn disease and 16 ulcerative colitis), with a median duration on IFX originator of 13.5 (6.8-35.5) months before switching to CT-P13, were included. No significant changes in IFX trough levels occurred after switching. The median baseline IFX trough level was 5.7 mcg/mL (3.8-9.3) versus 6.5 mcg/mL (3.9-8.6) at month 6 after switching (P = 0.900). Antibodies to IFX appeared in one patient after switching. The proportion of patients in clinical and/or biological remission did not significantly change after switching (all P > 0.05). No significant changes were observed in C-reactive protein, erythrocyte sedimentation rate, albumin, weight, and body mass index after the switch. Safety profile was also comparable. CONCLUSIONS: Pediatric patients with IBD on IFX originator can be successfully switched during maintenance to biosimilar CT-P13 without affecting efficacy, pharmacokinetics, immunogenicity, or safety.


Subject(s)
Biosimilar Pharmaceuticals/therapeutic use , Inflammatory Bowel Diseases/drug therapy , Infliximab/therapeutic use , Adolescent , Antibodies, Monoclonal/pharmacology , C-Reactive Protein/metabolism , Child , Colitis, Ulcerative/drug therapy , Colitis, Ulcerative/metabolism , Crohn Disease/drug therapy , Crohn Disease/metabolism , Drug Substitution/methods , Female , Gastrointestinal Agents/therapeutic use , Humans , Inflammatory Bowel Diseases/metabolism , Male , Prospective Studies , Treatment Outcome
11.
J Pediatr Gastroenterol Nutr ; 68(6): 847-853, 2019 06.
Article in English | MEDLINE | ID: mdl-30633108

ABSTRACT

OBJECTIVES: Therapeutic drug monitoring has been proposed as a useful tool in the management of infliximab (IFX) treated patients with inflammatory bowel disease. The aim of this retrospective study was to determine whether IFX trough levels after induction therapy are predictive for outcome at week 52. METHODS: All pediatric patients with inflammatory bowel disease receiving maintenance IFX at our centre, with IFX trough level available at their first maintenance infusion and a follow-up of at least 52 weeks were included. IFX induction regimens could be intensified at the discretion of the treating physician. All children received proactive drug monitoring during maintenance with dose adaptation aiming to target a therapeutic window of 3 to 7 µg/mL. RESULTS: We included 35 children (23 with Crohn disease and 12 with ulcerative colitis). Median IFX trough levels just before the first maintenance infusion were significantly higher in children achieving clinical (4.6 µg/mL [2.7-11.8] vs 1.5 µg/mL [0.9-3.0]), biological (4.6 µg/mL [2.5-10.3] vs 2.6 µg/mL [0.3-3.2]) and combined clinical/biological remission (6.0 µg/mL [3.2-12.0] vs 2.6 µg/mL [1.1-3.2]) at week 52 compared to children not meeting these criteria (all P ≤ 0.002). Binary logistic regression identified these trough levels as the only predictor for the same outcomes with an odds ratio (95% confidence interval) of 2.083 (1.085-3.998), 2.203 (1.101-4.408), and 2.264 (1.096-4.680), respectively (all P < 0.05). CONCLUSIONS: Adequate IFX exposure during induction therapy is associated with better clinical and/or biological remission at week 52. Postinduction IFX trough levels were the only predictor for clinical and/or biological remission at week 52.


Subject(s)
Colitis, Ulcerative/drug therapy , Crohn Disease/drug therapy , Drug Monitoring/statistics & numerical data , Gastrointestinal Agents/administration & dosage , Infliximab/administration & dosage , Adolescent , Biomarkers/blood , Child , Colitis, Ulcerative/blood , Crohn Disease/blood , Female , Follow-Up Studies , Gastrointestinal Agents/blood , Humans , Induction Chemotherapy , Infliximab/blood , Infusions, Intravenous , Logistic Models , Maintenance Chemotherapy , Male , Predictive Value of Tests , Prospective Studies , Retrospective Studies , Time Factors , Treatment Outcome
12.
J Crohns Colitis ; 13(1): 12-18, 2019 Jan 01.
Article in English | MEDLINE | ID: mdl-30281093

ABSTRACT

BACKGROUND AND AIMS: Vedolizumab is an IgG1 anti-α4ß7 integrin antibody approved for the treatment of inflammatory bowel diseases [IBD], but without clear safety data during conception, pregnancy and nursing. Animal studies showed that mucosal vascular addressin cell adhesion molecule 1 [MAdCAM-1] is expressed by maternal vessels in the placenta and recruits α4ß7-expressing cells that are considered important for maternal/fetal tolerance. Blocking this interaction by vedolizumab might affect this process. We aimed to evaluate pregnancy outcomes in vedolizumab-treated female IBD patients. METHODS: We conducted a retrospective, multicentre Belgian observational study. Details on disease activity, prenatal complications, delivery and neonatal outcome were collected through a case report form. RESULTS: Twenty-four pregnancies were reported. Five women had active disease at conception and one patient flared during pregnancy. There were 23 live births. Complications were observed in 25% of pregnancies [premature rupture of membranes, pre-eclampsia, miscarriage, elective termination and stillbirth] and in 35% of infants [prematurity, intra-uterine growth retardation, small for gestational age and congenital malformations including hip dysplasia, pulmonary valve stenosis and Hirschprung's disease]. Vedolizumab was continued throughout pregnancy in two females and stopped in the 1st and 2nd trimester in five and 16 patients, respectively. For live born children, the median [interquartile range] gestational age, weight and Apgar score 5 min after birth were 39 [37-39.6] weeks, 3270 [3080-3585] grams and 10 [9-10], respectively. CONCLUSIONS: Although several complications were observed, both in mothers and in newborns, no firm conclusions can be drawn. Awaiting prospective and controlled registries, vigilance and strict follow-up of pregnant patients treated with vedolizumab seems mandatory.


Subject(s)
Antibodies, Monoclonal, Humanized/therapeutic use , Gastrointestinal Agents/therapeutic use , Inflammatory Bowel Diseases/drug therapy , Pregnancy Complications/epidemiology , Pregnancy Outcome/epidemiology , Abortion, Spontaneous/epidemiology , Adult , Apgar Score , Belgium/epidemiology , Birth Weight , Congenital Abnormalities/epidemiology , Female , Fetal Growth Retardation/epidemiology , Gestational Age , Humans , Infant, Newborn , Infant, Small for Gestational Age , Live Birth/epidemiology , Pregnancy , Premature Birth/epidemiology , Retrospective Studies , Severity of Illness Index , Stillbirth/epidemiology , Young Adult
13.
J Crohns Colitis ; 12(11): 1316-1325, 2018 Nov 15.
Article in English | MEDLINE | ID: mdl-30239644

ABSTRACT

BACKGROUND: The role of therapeutic drug monitoring for infliximab [IFX] therapy in children with inflammatory bowel disease [IBD] is poorly investigated. We determined if IFX exposure correlates with long-term remission in children. METHODS: In this retrospective study, all children with Crohn's disease [CD] and ulcerative colitis [UC], receiving maintenance IFX at our centre, were included. Serum trough levels and cumulative drug exposure were correlated with clinical, biological, and endoscopic remission. All children received proactive drug monitoring and dose adaptation aiming to target a therapeutic window of 3-7 µg/mL. All data are presented as median [interquartile range]. RESULTS: A total of 686 serum levels during IFX maintenance in 52 paediatric patients [33 CD and 19 UC] were included (median 9 [4-18] per patient). With a median of 17 [8-36] months under IFX therapy, 39/52 [75%] patients were in clinical remission and 29/40 [73%] patients were in endoscopic remission. Median IFX trough levels were significantly higher when children achieved clinical remission (5.4 [3.8-8.0] µg/mL versus 4.2 [2.6-6.7] µg/mL), biological remission (5.2 [3.7-7.7] µg/mL versus 4.2 [2.6-6.5] µg/mL), combined clinical and biological remission (5.7 [4.0-8.2] µg/mL versus 4.4 [2.7-6.8] µg/mL) and endoscopic remission (6.5 [4.2-9.5] µg/mL versus 3.2 [2.3-5.6] µg/mL) compared with not meeting these criteria [all p ≤ 0.001]. CONCLUSIONS: In this large paediatric cohort, children with clinical and/or endoscopic remission had significantly higher IFX exposure during maintenance therapy. We showed excellent outcome data using serial and systematic measurements of drug levels. This could provide a rationale for the use of proactive drug monitoring in children in order to improve long-term outcomes.


Subject(s)
Colitis, Ulcerative/drug therapy , Crohn Disease/drug therapy , Gastrointestinal Agents/blood , Gastrointestinal Agents/therapeutic use , Infliximab/blood , Infliximab/drug effects , Adolescent , C-Reactive Protein/metabolism , Child , Colitis, Ulcerative/diagnostic imaging , Crohn Disease/diagnostic imaging , Drug Monitoring , Endoscopy, Gastrointestinal , Female , Gastrointestinal Agents/administration & dosage , Humans , Infliximab/administration & dosage , Maintenance Chemotherapy , Male , Recurrence , Remission Induction , Retrospective Studies , Treatment Outcome
14.
Pediatr Nephrol ; 33(11): 2085-2093, 2018 11.
Article in English | MEDLINE | ID: mdl-29987458

ABSTRACT

BACKGROUND: Renal pathology in tuberous sclerosis complex (TSC) is characterized by the growth of angiomyolipoma and renal cysts, and in rare cases renal cell carcinoma. Other consequences of renal involvement in TSC, including hypertension, proteinuria, and hyperfiltration, are not well studied. We aimed to analyze the early manifestations of the renal TSC phenotype in a young TSC cohort and to explore common, modifiable risk factors. METHODS: In this retrospective cohort study, TSC patients attending the TSC clinics of two tertiary hospitals were included. Data on demographics, history, genotype, kidney function, hematuria, proteinuria, blood pressure, and renal imaging were collected. RESULTS: Eighty patients were included, with a median age of 0.8 years (0.0-63.0) at first presentation, and a median follow-up time of 10.2 (0.4-41.0) years. Mutation analysis was available in 64 patients (80%). Renal lesions (cysts or angiomyolipoma) were observed in 55/73 (75%). Thirty-two percent (19/60) were hypertensive, 8/51 (16%) had proteinuria, and 18/71 (25%) had hyperfiltration (median eGFR 154 ml/min/m2). Six (7.5%) patients had developed end stage renal disease at the last follow-up. No association was found between hyperfiltration, hypertension, or proteinuria and CKD ≥ 3. Cox regression showed a significant positive association between the presence of a renal intervention and CKD ≥ 3 (Hazard-Ratio 3.91, P < 0.05). CONCLUSIONS: Besides renal cysts and angiomyolipoma, the modifiable progression factors hypertension, proteinuria, and hyperfiltration occur frequently and early in TSC patients. This represents a preventive treatment target.


Subject(s)
Kidney Failure, Chronic/epidemiology , Tuberous Sclerosis/complications , Adolescent , Adult , Aged , Angiomyolipoma/epidemiology , Angiomyolipoma/etiology , Angiomyolipoma/pathology , Child , Child, Preschool , Disease Progression , Female , Follow-Up Studies , Glomerular Filtration Rate , Humans , Hypertension/epidemiology , Hypertension/etiology , Hypertension/pathology , Infant , Infant, Newborn , Kidney/pathology , Kidney Diseases, Cystic/epidemiology , Kidney Diseases, Cystic/etiology , Kidney Diseases, Cystic/pathology , Kidney Failure, Chronic/etiology , Kidney Failure, Chronic/pathology , Kidney Neoplasms/epidemiology , Kidney Neoplasms/etiology , Kidney Neoplasms/pathology , Male , Middle Aged , Prevalence , Proteinuria/epidemiology , Proteinuria/etiology , Proteinuria/pathology , Retrospective Studies , Risk Factors , Young Adult
15.
Expert Opin Drug Saf ; 17(2): 185-196, 2018 02.
Article in English | MEDLINE | ID: mdl-29202588

ABSTRACT

INTRODUCTION: Although anti-TNF therapy has changed the scenery of pediatric inflammatory bowel diseases (IBD) immensely, there are still patients with an unfortunate outcome. Approximately one third of patients that initially respond to anti-TNF therapy will lose that response over time and need treatment optimization. Loss of response (LOR) is a big concern in IBD management and especially among pediatric patients where treatment options are more limited than in adults. In children it is even more important to sustain response with minimal toxicity. Therapeutic drug monitoring (TDM) is proposed as a tool to reach this goal. AREAS COVERED: This review focuses on the importance of TDM of anti-TNF and the role TDM has in clinical practice of pediatric IBD. EXPERT OPINION: Although TDM is not yet widely used in pediatric IBD, the available literature suggests it to be a promising tool, especially in patients with LOR to anti-TNF. There is increasing evidence that also in children, higher anti-TNF drug levels are associated with sustained response, and likewise low or undetectable trough levels increase the likelihood of LOR. TDM-based treat to target strategies are being designed in adult studies, but more prospective studies also in pediatric IBD populations looking at the role of proactive testing are needed.


Subject(s)
Drug Monitoring/methods , Inflammatory Bowel Diseases/drug therapy , Tumor Necrosis Factor-alpha/antagonists & inhibitors , Adult , Child , Gastrointestinal Agents/administration & dosage , Gastrointestinal Agents/adverse effects , Gastrointestinal Agents/pharmacology , Humans , Treatment Outcome
16.
Pediatr Nephrol ; 33(6): 957-971, 2018 06.
Article in English | MEDLINE | ID: mdl-28646278

ABSTRACT

The liver and kidneys are often similarly affected by a single disease. This is the case in metabolic, immunological, toxic, and infectious diseases, and in the different congenital malformation syndromes. Also, an enzymatic defect in an otherwise healthy liver or the consequences of advanced liver disease by itself can cause kidney disease as a secondary phenomenon. In this review, we describe numerous pathogenic mechanisms leading to dysfunction or malformations of the liver and kidneys in children. We encourage multidisciplinary management for optimal care. A combined liver-kidney transplantation is sometimes needed.


Subject(s)
Kidney Diseases/complications , Kidney/physiopathology , Liver Diseases/complications , Liver/physiopathology , Child , Humans , Kidney Diseases/therapy , Kidney Transplantation/methods , Liver Diseases/therapy , Liver Transplantation/methods
17.
Eur J Pediatr ; 176(4): 449-454, 2017 Apr.
Article in English | MEDLINE | ID: mdl-28110418

ABSTRACT

Hemolytic uremic syndrome (HUS) is a disease characterized by thrombotic microangiopathy with a triad of non-immune hemolytic anemia, thrombocytopenia, and renal impairment. Approximately 10% of cases of HUS are classified as atypical (aHUS). While today many genetically forms of aHUS pathology are known, only about 50% of carriers precipitate the disease. The reason remains unclear, and triggering events like intercurrent infections have been postulated. In rare cases, influenza A is the known trigger of aHUS; however, no cases of influenza B have been reported. CONCLUSION: We describe for the first time that influenza B strain as a trigger for aHUS in children with primary hereditary forms. We also showed in our three cases that immunization appears to be safe; however, this needs to be confirmed in a larger cohort. What is Known: • Known triggers of aHUS are infectious specimen. • Influenza A-associated aHUS cases are rarely published. What is New: • aHUS can be triggered by influenza B virus infection. • Influenza vaccination of patients with aHUS appears safe.


Subject(s)
Atypical Hemolytic Uremic Syndrome/genetics , Creatine/blood , Influenza B virus/genetics , Adolescent , Atypical Hemolytic Uremic Syndrome/blood , Atypical Hemolytic Uremic Syndrome/therapy , Biomarkers/blood , Child , Humans , Male , Mutation , Plasma Exchange , Recurrence
18.
Acta Chir Belg ; 116(6): 333-339, 2016 Dec.
Article in English | MEDLINE | ID: mdl-27477384

ABSTRACT

BACKGROUND: Microvillus inclusion disease (MVID) is a known congenital cause of intractable diarrhea resulting in permanent intestinal failure. There is need for a lifelong total parenteral nutrition (TPN) from diagnosis and the prognosis is poor. Most patients die by the second decade of life as a result of complications of parenteral alimentation including liver failure or sepsis. The only available treatment at this moment is a small bowel transplantation. But before that moment, the patients often suffer from a persistent failure to thrive and electrolyte disturbances despite continuous TPN. METHODS AND RESULTS: We report what we believe is a first case of an extensive small bowel resection in a 5-month-old boy with proven MVID to act as a bridge to (liver-) intestinal transplantation to treat failure to thrive and intractable diarrhea. CONCLUSIONS: An extensive small bowel resection can be done to enhance the chance of survival leading up to the transplantation by managing fluid and electrolyte imbalance. It facilitates medical management of these patients and makes a bowel transplantation possible at a later stage.


Subject(s)
Digestive System Surgical Procedures/methods , Intestines/surgery , Malabsorption Syndromes/surgery , Microvilli/pathology , Mucolipidoses/surgery , Organ Transplantation , Biopsy , Follow-Up Studies , Humans , Infant, Newborn , Intestines/diagnostic imaging , Malabsorption Syndromes/diagnosis , Male , Mucolipidoses/diagnosis , Time Factors
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