Diagnostic algorithm of centrally mediated abdominal pain syndrome — does it need changes? According to the materials of Rome IV Criteria

The article discusses the algorithm for diagnosing of centrally mediated abdominal pain syndrome (CAPS), formerly called functional abdominal pain syndrome, contained in the Rome Criteria of the IV revision (2016). Recommendations for the diagnosis of CAPS, mainly based on the compliance of the signs available in patients with the developed diagnostic criteria with a minimum of additional laboratory tests, are criticized, since such an approach is fraught with possible errors. The author considers the diagnosis of CAPS as a “diagnosis of exclusion”, which can be made only after a thorough examination of patients using laboratory and instrumental research methods (including ultrasound and endoscopic), confi rming the absence of organic diseases in patients.

Gastric motility and pulmonary function in children with functional abdominal pain disorders and asthma: A pathophysiological study

Background An association has been shown between functional abdominal pain disorders (FAPDs) and asthma. However, the exact reason for this association is obscured. The main objective of this study is to identify the possible underlying pathophysiological mechanisms for the association between FAPDs and asthma using gastric motility and lung function tests. Methods This was a cross-sectional comparative study that consisted of four study groups. Twenty-four children (age 7–12 years) each were recruited for four study groups; asthma only, FAPDs only, both asthma and FAPDs, and healthy controls. Asthma was diagnosed using the history and bronchodilator reversibility test. The diagnosis of FAPDs was made using Rome IV criteria. All subjects underwent ultrasound assessment of gastric motility and pulmonary function assessment by spirometry, using validated techniques. Results All gastric motility parameters, gastric emptying rate, amplitude of antral contraction, and antral motility index, were significantly impaired in children with FAPDs only, children with asthma only, and children with both asthma & FAPDs, compared to controls (p<0.05). Pulmonary function parameters indicating airway obstruction (FEV1/FVC ratio, peak expiratory flow rate, FEF25-75%) were not impaired in children with FAPDs only compared to controls (p>0.05), but significantly impaired in children with asthma and children with both disorders. Antral motility index correlated with the FEV1/FVC ratio (r = 0.60, p = 0.002) and FEF25%-75% (r = 0.49, p = 0.01) in children with both asthma and FAPDs. Conclusions Gastric motor functions were significantly impaired in children with asthma, children with FAPDs, and children with both disorders. Motility index, measuring overall gastric motor activity, showed a significant positive correlation with lung function parameters that measure airflow limitation. Therefore, these diseases might arise as a result of primary disturbance of smooth muscle activity in the airways and gastrointestinal wall, which could be a possible pathophysiological mechanism for this association between asthma and FAPDs.

Effect of a Symbiotic Mixture on Fecal Microbiota in Pediatric Patients Suffering of Functional Abdominal Pain Disorders

(1) Background: Functional abdominal pain disorders (FAPDs) represent one of the main etiologies of chronic abdominal pain in the pediatric population. A wide spectrum of probiotic or prebiotic mixtures has been evaluated in trials regarding benefits in patients with FAPDs, mainly in the adult population. (2) Methods: This study was interested in evaluating the effect of oral supplementation with a symbiotic mixture on intestinal microbiota in children with functional dyspepsia (FD), irritable bowel syndrome with diarrhea (IBS-D), and irritable bowel syndrome with constipation (IBS-C). A combination of six bacterial strains (Lactobacillus rhamnosus R0011, Lactibacillus casei R0215, Bifidobacterium lactis BI-04, Lactobacillus acidophilus La-14, Bifidobacterium longum BB536, Lactobacillus plantarum R1012) and 210 mg of fructo-oligosaccharides-inulin were administered orally, daily, for 12 weeks and patients were scored for severity of symptoms and fecal microbiota before and after the treatment. (3) Results: The proportion of patients with adequate symptom relief was higher in the IBS-D than in the IBS-C group; however, the difference was not statistically significant (74.4% vs. 61.9%, p = 0.230). There was an increasing proportion of bacterial genera associated with health benefits, for both IBS-C and IBS-D (IBS-C: 31.1 ± 16.7% vs. 47.7 ± 13.5%, p = 0.01; IBS-D: 35.8 ± 16.2% vs. 44.1 ± 15.1%, p = 0.01). (4) Conclusions: Administration of a symbiotic preparation resulted in significant changes to the microbiota and gastrointestinal symptoms in patients with FAPDs.

The Gut Microbiome Alterations in Pediatric Patients with Functional Abdominal Pain Disorders

In this prospective longitudinal study, we enrolled 54 healthy pediatric controls and 28 functional abdominal pain disorders (FAPDs) pediatric patients (mean age was 11 ± 2.58 years old). Fecal samples and symptom questionnaires were obtained from all participants over the course of the year. Clinical data assessment showed that FAPDs patients were more symptomatic than the control group. Microbiome analysis revealed that Phylum Bacteroidetes was higher in FAPDs compared to the control group (p < 0.05), while phylum Firmicutes was lower in FAPDs (p < 0.05). In addition, Verrucomicrobiota was higher in the control group than the FAPDs (p < 0.05). At the genus level the relative abundance of 72 bacterial taxa showed statistically significant differences between the two groups and at the school term levels. In the control group, Shannon diversity, Observed_species, and Simpson were higher than the FAPDs (p < 0.05), and beta diversity showed differences between the two groups (PERMANOVA = 2.38; p = 0.002) as well. Using linear discriminant analysis effect size (LEfSe), Enterobacteriaceae family and Megaspherae showed increased abundances in vacation term (LDA score > 2.0, LEfSe, p < 0.05). In the FAPDs group, the severity of symptoms (T-scores) correlated with 11 different taxa bacterial relative abundances using Pearson′s correlation and linear regression analyses. Our data showed that gut microbiome is altered in FAPDs compared to the control. Differences in other metrics such as alpha- and beta diversity were also reported between the two groups. Correlation of the severity of the disease (T-scores) correlated with gut microbiome. Finally, our findings support the use of Faecalibacterium/Bacteroides ratio as a potential diagnostic biomarker for FAPDs.

Functional Abdominal Pain of Children: Therapy with Bacillus Coagulans GBI-30, 6086 and Insight into Its Probiotic Properties

Background: Probiotics are effective in the treatment of functional gastrointestinal disorders in adults but there is lack of enough clinical evidence in children. Aim: To evaluate effectiveness of Bacillus Coagulans GBI-30, 6086 along with digestive enzymes in the treatment of childhood functional abdominal pain (FAP). Methods: Children with FAP, based on the Rome IV criteria (n = 95, aged 5-16 years), received Bacillus Coagulans GBI-30, 6086 along with digestive enzymes from a commercially available preparation - Tummysoft® for three weeks. Treatment response was assessed by improvement in the Quality of Life in Reflux and Dyspepsia Questionnaire (QOLRAD) score and Global Overall Symptom (GOS) scale. Results: Patients diagnosed with FAP upon receiving a 3-week treatment with Bacillus Coagulans GBI-30, 6086 along with digestive enzymes, registered statistically significant improvement in both QOLRAD (Baseline, 30.27 ± 5.95; 10th Day: 108.39 ± 7.06; 21st day: 173.71 ± 6.71, P=0.00) and GOS scale (Baseline, 3.10 ± 0.37; 10th Day: 2.15 ± 0.73; 21st day: 1.00 ± 0.00, P = 0) signifying the efficacy of the probiotic in FAP. Conclusion: Bacillus Coagulans GBI-30, 6086 along with digestive enzymes from a commercially available preparation - Tummysoft® was found to be effective in the treatment of childhood functional abdominal pain (FAP).