Impact of Biometric Patient Data, Probiotic Supplementation, and Selected Gut Microorganisms on Calprotectin, Zonulin, and sIgA Concentrations in the Stool of Adults Aged 18-74 Years

Alterations to the intestinal barrier may be involved in the pathogenesis of various chronic diseases. The diagnosis of mucosal barrier disruption has become a new therapeutic target for disease prevention. The aim of this study was to determine whether various patient demographic and biometric data, often not included in diagnostic analyses, may affect calprotectin, zonulin, and sIgA biomarker values. Stool markers' levels in 160 samples were measured colorimetrically. The analysis of twenty key bacteria (15 genera and 5 species) was carried out on the basis of diagnostic tests, including cultures and molecular tests. The concentrations of selected markers were within reference ranges for most patients. The sIgA level was significantly lower in participants declaring probiotics supplementation (p = 0.0464). We did not observe differences in gastrointestinal discomfort in participants. We found significant differences in the sIgA level between the 29-55 years and >55 years age-related intervals groups (p = 0.0191), together with a significant decreasing trend (p = 0.0337) in age-dependent sIgA concentration. We observed complex interdependencies and relationships between their microbiota and the analyzed biomarkers. For correct clinical application, standardized values of calprotectin and sIgA should be determined, especially in elderly patients. We observed a correlation between the composition of the gut community and biomarker levels, although it requires further in-depth analysis.

Commercial microbiota test revealed differences in the composition of intestinal microorganisms between children with autism spectrum disorders and neurotypical peers

The early-life modifications of intestinal microbiota may impact children's subsequent emotional and cognitive development. Studies show that some bacteria species in gut microbiota, and the lack of others, may play a key role in autism spectrum disorders (ASD) development. Fecal samples were obtained from three groups of children: 16 healthy, 24 with allergies (ALG), and 33 with ASD (probiotics and non-probiotics users). The analysis was carried out according to the KyberKompakt Pro protocol. We observed a significantly higher level of Klebsiella spp. in the healthy children from the non-probiotics group, considering three groups. In the same group, Bifidobacterium spp. the level was lower in ASD compared to neurotypical individuals. In healthy children who did not use probiotics, strong positive correlations were observed in E. coli and Enterococcus spp. and Bacteroides and Klebsiella spp., and a negative correlation for Akkermansia muciniphila with both Klebsiella spp. and Bacteroides spp. In the ASD group who take probiotics, a strongly negative correlation was observed in Lactobacillus spp., and both Faecalibacterium prausnitzii and Akkermansia muciniphila levels. In the ALG group, the strongest, negative correlation was found between Enterococcus spp. and Lactobacillus spp. as in Akkermansia muciniphila and Bifidobacterium spp. The simple commercial test revealed minor differences in the composition of intestinal microorganisms between children with autism spectrum disorders and neurotypical peers.

Methods of analysis of gut microorganism--actual state of knowledge

INTRODUCTION

Microbiota plays an integral part in maintaining organism homeostasis, through eliminat pathogens, anti-cancer activity, synthesis of digestive enzymes and vitamins, maintaining the continuity of the intestinal epithelium and stimulation of the gastrointestinal immune system, and encourage a quicker and more efficient immune response. Changes in the microbiota composition is often observed in patients with allergy, atopy, irritable bowel syndrome and other diseases, which is the reason for a growing interest in methods of identification of the gut microbial complex.

OBJECTIVE

The aim of the study was to compare the state of current knowledge about two methods used in the study of intestinal microorganisms complex: the traditional culture method and genetic analysis. DESCRIPTION OF THE STATE OF KNOWLEDGE: Both techniques have advantages and disadvantages. The biggest limitation of the culture method is its inability to detect a significant number of the intestinal microbes. Using the microbiological technique we can only detect identifiable bacteria that can be grown on available substrates. For an accurate quantitative and qualitative investigation of the total microbiota, the more expensive genetic method is required. Due to genetic analysis it is possible to identify the vast number of new microorganisms and identify the dominant bacterial groups in different parts of the gastrointestinal tract.

SUMMARY

Each of the presented techniques plays specific role in medicine and science. The combination of both methods may become a critical element for understanding the ecosystem of intestinal bacteria.