Risultati per: Microbiota e barriera intestinale distanti ma non troppo: implicazioni metaboliche sistemiche

We read with interest the recent article by Haifer et al (Gut, 2022, 2022–3 27 742), which reported that donor gut microbiome stability and species evenness were associated with higher donor species engraftment in patients with UC following faecal microbiota transplantation (FMT). This has brought us one step closer towards the selection of optimal FMT donors. However, the high prevalence of extended-spectrum beta-lactamase organisms and the COVID-19 pandemic have restricted the recruitment of FMT donors.1 An alternative means to increase the stability and species evenness is to pool the stool samples from multiple eligible FMT donors, which has been shown to be associated with higher clinical efficacy in UC.2 In obesity-related metabolic disorders, outcomes following FMT have been variable.3–8 Although the underlying mechanisms are unclear, the efficacy of FMT is likely to be affected by…

These treatments are recommended “conditionally” for certain groups of patients with Clostridioides difficile colitis.

Objective
Early disease prediction is challenging in acute pancreatitis (AP). Here, we prospectively investigate whether the microbiome predicts severity of AP (Pancreatitis—Microbiome As Predictor of Severity; P-MAPS) early at hospital admission.

Design
Buccal and rectal microbial swabs were collected from 424 patients with AP within 72 hours of hospital admission in 15 European centres. All samples were sequenced by full-length 16S rRNA and metagenomic sequencing using Oxford Nanopore Technologies. Primary endpoint was the association of the orointestinal microbiome with the revised Atlanta classification (RAC). Secondary endpoints were mortality, length of hospital stay and severity (organ failure >48 hours and/or occurrence of pancreatic collections requiring intervention) as post hoc analysis. Multivariate analysis was conducted from normalised microbial and corresponding clinical data to build classifiers for predicting severity. For functional profiling, gene set enrichment analysis (GSEA) was performed and normalised enrichment scores calculated.

Results
After data processing, 411 buccal and 391 rectal samples were analysed. The intestinal microbiome significantly differed for the RAC (Bray-Curtis, p value=0.009), mortality (Bray-Curtis, p value 0.006), length of hospital stay (Bray-Curtis, p=0.009) and severity (Bray-Curtis, p value=0.008). A classifier for severity with 16 different species and systemic inflammatory response syndrome achieved an area under the receiving operating characteristic (AUROC) of 85%, a positive predictive value of 67% and a negative predictive value of 94% outperforming established severity scores. GSEA revealed functional pathway units suggesting elevated short-chain fatty acid (SCFA) production in severe AP.

Conclusions
The orointestinal microbiome predicts clinical hallmark features of AP, and SCFAs may be used for future diagnostic and therapeutic concepts.

Trial registration number
NCT04777812.