The microbiota of the gut in preschool children with normal and excessive body weightOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
This study investigated the composition of the gut microbiota in preschool children with and without overweight or obesity. Researchers used quantitative PCR (qPCR) and terminal restriction fragment length polymorphism to profile specific bacterial groups in fecal samples. They also measured fecal calprotectin as a marker of intestinal inflammation and quantified liver enzymes in the overweight and obese children.
Who was studied?
The cohort consisted of forty children aged four to five years recruited from the south of Sweden. Twenty of the children were classified as overweight or obese, and twenty had a body mass index within the normal range, serving as the comparison group.
What were the most important findings?
The gram-negative family Enterobacteriaceae was present at significantly higher concentrations in the overweight/obese children. In contrast, levels of Desulfovibrio, a sulfate-reducing bacterial genus, and Akkermansia muciniphila-like bacteria were both significantly lower in the overweight/obese group. No significant differences were found for Lactobacillus, Bifidobacterium, or the Bacteroides fragilis group, and overall bacterial diversity tended to be lower in the overweight/obese children without reaching statistical significance. Bifidobacterium concentration was inversely correlated with alanine aminotransferase (ALT) levels in the overweight/obese children, while fecal calprotectin did not differ between groups.
What are the greatest implications of this study?
The findings suggest that excess body weight in early childhood is already associated with distinct shifts in gut microbial composition, including reduced levels of Desulfovibrio and Akkermansia muciniphila-like bacteria alongside increased Enterobacteriaceae. The inverse relationship between Bifidobacterium and ALT hints at a possible link between specific gut bacteria and early liver enzyme changes in overweight children. These results point to the preschool years as a relevant window for studying how gut microbiota relates to weight status and metabolic health.