Antibiotic Cocktail for Pediatric Acute Severe Colitis and the Microbiome : The PRASCO Randomized Controlled Trial

Background: Alterations in the microbiome have been postulated to drive inflammation in IBD. In this pilot randomized controlled trial, we evaluated the effectiveness of quadruple antibiotic cocktail in addition to intravenous-corticosteroids (IVCSs) in acute severe colitis (ASC). Methods: Hospitalized children with ASC (pediatric ulcerative colitis activity index [PUCAI] >= 65) were randomized into 2 arms: the first received antibiotics in addition to IVCS (amoxicillin, vancomycin, metronidazole, doxycycline/ciprofloxacin [IVCS+AB]), whereas the other received only IVCS for 14 days. The primary outcome was disease activity (PUCAI) at day 5. Microbiome was analyzed using 16S rRNA gene and metagenome. Results: Twenty-eight children were included: 16 in the AB + IVCS arm and 12 in the IVCS arm (mean age 13.9 +/- 4.1 years and 23 [82%] with extensive colitis). The mean day-5 PUCAI was 25 +/- 16.7 vs 40.4 +/- 20.4, respectively (P = 0.037). Only 3 and 2 children, respectively, required colectomy during 1-year follow-up (P = 0.89). Microbiome data at time of admission were analyzed for 25 children, of whom 17 (68%) had a predominant bacterial species (>33% abundance); response was not associated with the specific species, whereas decreased microbiome diversity at admission was associated with day-5 response in the IVCS arm. Conclusion: Patients with ASC have alterations in the microbiome characterized by loss of diversity and presence of predominant bacterial species. Quadruple therapy in addition to IVCS improved disease activity on day 5, but larger studies are needed to determine whether this is associated with improved long-term outcomes.Peer reviewe

Infliximab in young paediatric IBD patients : it is all about the dosing

Infliximab (IFX) is administered intravenously using weight-based dosing (5 mg/kg) in inflammatory bowel disease (IBD) patients. Our hypothesis is that especially young children need a more intensive treatment regimen than the current weight-based dose administration. We aimed to assess IFX pharmacokinetics (PK), based on existing therapeutic drug monitoring (TDM) data in IBD patients = 10 years). Median age was 8.3 years (IQR 6.9-8.9) in YP compared with 14.3 years (IQR 12.8-15.6) in OP at the start of IFX. At the start of maintenance treatment, 72% of YP had trough levels below therapeutic range (< 5.4 mu g/mL). After 1 year of scheduled IFX maintenance treatment, YP required a significantly higher dose per 8 weeks compared with OP (YP; 9.0 mg/kg (IQR 5.0-12.9) vs. OP; 5.5 mg/kg (IQR 5.0-9.3);p < 0.001). The chance to develop antibodies to infliximab was relatively lower in OP than YP (0.329 (95% CI - 1.2 to - 1.01);p < 0.001), while the overall duration of response to IFX was not significantly different (after 2 years 53% (n = 29) in YP vs. 58% (n = 45) in OP;p = 0.56). Conclusion: Intensification of the induction scheme is suggested for PIBD patients aged < 10 years. What is Known

Infantile and very early onset-inflammatory bowel disease: a multicenter study

Objective: In this study, we described disease characteristics and assessed long-term outcomes, in patients diagnosed with very-early-onset inflammatory bowel disease (VEOIBD) (diagnosed before 6 years of age), and infantile-IBD (before 2 years). Methods: Cases from 21 centers worldwide diagnosed with VEOIBD (2008-2018), with minimum two years of follow-up, were retrospectively reviewed. Results: The total cohort included 243 patients (52% males, median follow-up of 5.8[IQR 3.2- 8.4] years, including 69[28%] with infantile-IBD. IBD subtypes included Crohn’s disease (CD), ulcerative colitis (UC) or IBD-unclassified (IBDU) in 30%, 59% and 11%, respectively. Among patients with CD - 94% had colonic involvement, and among patients with UC/IBDU – 75% had pancolitis. Compared to non-infantile VEOIBD, patients with infantile-IBD presented with higher rates of IBDU, lower hemoglobin and albumin levels and higher C-reactive protein, and had lower response rates to first induction therapy and to corticosteroids therapy (p&lt;0.05 for all). Colectomy and diversion surgeries were performed in 11% and 4%, respectively, with no significant differences between age groups. Corticosteroid-free remission rates were 74% and 78% after 3 and 5 years, respectively, and 86% at end of follow-up. Genetic testing was performed in 96 (40%) patients. Among tested population 15 (16%) were identified with monogenic disease. This group demonstrated lower response rates to induction therapies, higher rates of surgical intervention and higher rates of major infections (p&lt;0.05 for all). Conclusion: Patients with VEOIBD, including infantile-IBD, exhibit low rate of disease complications and surgical interventions at the long-term. Patients with monogenic-IBD are at risk of more severe disease course

Congenital Diarrhea and Cholestatic Liver Disease: Phenotypic Spectrum Associated with MYO5B Mutations

Myosin Vb (MYO5B) is a motor protein that facilitates protein trafficking and recycling in polarized cells by RAB11- and RAB8-dependent mechanisms. Biallelic MYO5B mutations are identified in the majority of patients with microvillus inclusion disease (MVID). MVID is an intractable diarrhea of infantile onset with characteristic histopathologic findings that requires life-long parenteral nutrition or intestinal transplantation. A large number of such patients eventually develop cholestatic liver disease. Bi-allelic MYO5B mutations are also identified in a subset of patients with predominant early-onset cholestatic liver disease. We present here the compilation of 114 patients with disease-causing MYO5B genotypes, including 44 novel patients as well as 35 novel MYO5B mutations, and an analysis of MYO5B mutations with regard to functional consequences. Our data support the concept that (1) a complete lack of MYO5B protein or early MYO5B truncation causes predominant intestinal disease (MYO5B-MVID), (2) the expression of full-length mutant MYO5B proteins with residual function causes predominant cholestatic liver disease (MYO5B-PFIC), and (3) the expression of mutant MYO5B proteins without residual function causes both intestinal and hepatic disease (MYO5B-MIXED). Genotype-phenotype data are deposited in the existing open MYO5B database in order to improve disease diagnosis, prognosis, and genetic counseling.This research was funded by Jubiläumsfonds der Österreichischen Nationalbank, grant no.16678 (to A.R.J.), grant no. 18019 (to G.-F.V.) and Tiroler Wissenschaftsfonds, grant No. 0404/2386 (toG.-F.V.).info:eu-repo/semantics/publishedVersio

Oral Vancomycin and Gentamicin for Treatment of Very Early Onset Inflammatory Bowel Disease.

10.1159/000475660Digestion954310-31

Oral Vancomycin and Gentamicin for Treatment of Very Early Onset Inflammatory Bowel Disease

Background: The pathogenesis of inflammatory bowel disease (IBD) is complex and involves the contribution of genetic and environmental factors. Many patients with very early onset IBD are difficult to treat. The current antibiotic medication that targets gram-negative and anaerobic bacteria provides only moderate efficacy in subsets of patients with IBD. Methods: We report a case series of 5 children with a mean age of 1.6 years (range 6 months to 2.7 years) during IBD onset, who were previously refractory to standard treatments and who received oral vancomycin with or without gentamicin. Results: Four out of 5 children demonstrated substantial therapeutic effect, and the effect was sustained in 3 children over a follow-up period of 12-33 months. Conclusion: Our findings are consistent with model systems and suggest that randomized trials are required to establish whether a change in therapeutic paradigm, that is, targeting gram-positive bacteria with nonabsorbable antibiotics, may have therapeutic benefits

Children included in randomised controlled trials of biologics in inflammatory bowel diseases do not represent the real-world patient mix.

Patients enrolled in randomised controlled trials (RCTs) may differ from the target population due to restricted eligibility criteria. To compare treatment response to biologics in routine practice for children with inflammatory bowel diseases (IBD) who would and would not have been eligible for enrolment in the regulatory RCT of the same drug. We enrolled children with IBD who initiated adalimumab, infliximab, vedolizumab or ustekinumab. The eligibility criteria as defined in the RCT of the corresponding biologic were applied to each patient. The primary outcome was 12-month steroid-free remission (SFR) without switching biologics or undergoing surgery. We screened 289 children (198 [68%] with Crohn's disease [CD], 91 [32%] with ulcerative colitis [UC]) with 326 initiations of biologics. Only 62 of 164 (38%) children with moderate-to-severe disease would have been eligible for inclusion in the original RCTs. The SFR rate was higher in the eligible children (51%) than in the ineligible children (31%; OR 2.3 [95%CI 1.2-4.5]; p = 0.01). The main exclusion criterion was prohibited previous therapies (47%). Ineligible CD patients were older, more often had a family history of IBD and had higher levels of CRP than eligible children; in UC there were no differences between the groups. Most children with IBD who initiate biologics would not have been eligible to be included in the corresponding regulatory RCTs. The outcomes of ineligible patients were worse than for eligible patients. Results from RCTs should be interpreted with caution when applied to clinical practice

Identification of iatrogenic perforation in paediatric gastrointestinal endoscopy

Objectives: Iatrogenic viscus perforation in paediatric gastrointestinal endoscopy (GIE) is a very rare, yet potentially life-threatening event. There are no evidence-based recommendations relating to immediate post-procedure follow-up to identify perforations and allow for timely management. This study aims to characterize the presentation of children with post-GIE perforation to better rationalize post-procedure recommendations. Methods: Retrospective study based on unrestricted pooled data from centers throughout Europe North America and the Middle East affiliated with the Endoscopy Special Interest Groups of European Society for Paediatric Gastroenterology Hepatology and Nutrition and North American Society for Pediatric Gastroenterology Hepatology and Nutrition. Procedural and patient data relating to clinical presentation of the perforation were recorded on standardized REDcap case-report forms. Results: Fifty-nine cases of viscus perforation were recorded (median age 6 years (IQR 3-13)). 29/59 (49%) occurred following esophagogastroduodenoscopy (EGD), 26/59 (44%) following ileocolonoscopy, with 2/59 (3%) cases each following balloon enteroscopy and ERCP.28/59 (48%) of perforations were identified during the procedure (26/28 (93%) endoscopically, 2/28 (7%) by fluoroscopy), a further 5/59 (9%) identified within 4 hours. Overall 80% of perforations were identified within 12 hours.Amongst perforations identified subsequent to the procedure 19/31 (61%) presented with pain, 16/31 (52%) presented with fever and 10/31 (32%) presented with abdominal rigidity or dyspnea.30/59 (51%) were managed surgically, 17/59 (29%) managed conservatively and 9/59 (15%) endoscopically. 4/59 (7%) patients died, all following esophageal perforation. Conclusions: Iatrogenic perforation was identified immediately in over half of cases and in 80% of cases within 12 hours. This novel data can be utilized to generate guiding principles of post-procedural follow-up and monitoring