Relative Abundance in Bacterial and Fungal Gut Microbes in Obese Children: A Case Control StudyOriginal 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 case control study evaluated gut microbiota biodiversity in school-aged children, looking at both bacterial and fungal communities. Fecal samples were analyzed using 16S rRNA amplification followed by denaturing gradient gel electrophoresis (DGGE) and sequencing. Real-time PCR was then used to quantify the most representative microbial species and genera. The goal was to compare gut microbial composition between obese and normal-weight children.
Who was studied?
The study included 28 obese children (mean age 10.03 years) and 33 age- and sex-matched normal-weight children. BMI z-scores were calculated for each child, and obesity status was defined according to WHO criteria. Fecal samples from these 61 school-aged children formed the basis of the analysis.
What were the most important findings?
Bacterial biodiversity was high across DGGE profiles and did not correlate significantly with BMI z-score groups, but fungal (yeast) richness was lower than bacterial richness overall. Eubacterium rectale, Saccharomyces cerevisiae, Candida albicans, and Candida glabrata were present in all samples, while Debaryomyces hansenii appeared only in two obese children. Obese children showed a significantly lower abundance of Akkermansia muciniphila, Faecalibacterium prausnitzii, and Bacteroides/Prevotella compared to normal-weight children.
What are the greatest implications of this study?
The reduced abundance of Faecalibacterium prausnitzii, a butyrate-producing anti-inflammatory commensal, and Akkermansia muciniphila in obese children suggests these microbes may play a protective role against childhood obesity. The findings indicate that both bacterial and fungal gut community shifts, not bacteria alone, may be relevant to pediatric obesity. This supports further investigation into these specific taxa as potential biomarkers or targets in childhood obesity research.