Microbiota and Derived Parameters in Fecal Samples of Infants with Non-IgE Cow's Milk Protein Allergy under a Restricted DietOriginal 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?
Seventeen infants aged one to two years with non-IgE mediated cow's milk protein allergy (NIM-CMPA) were followed on a six-month milk-exclusion diet using different therapeutic protein hydrolysates (extensively hydrolyzed, soy, or rice formula). Ten age-matched healthy infants on an unrestricted diet served as controls.
How was it studied?
Fecal samples were collected after the exclusion period and analyzed by 16S rRNA gene sequencing for microbiota composition, alongside short-chain fatty acids, calprotectin, and TGF-β1 levels. Tolerance was confirmed by oral food challenge.
What did they find?
Infants fed vegetable protein-based formulas (rice or soy) had markedly lower Bifidobacteriaceae than those fed extensively hydrolyzed formula, and the three infants who failed to develop tolerance (all on rice formula) showed a distinct, low-Actinobacteria colonization pattern. Compared with healthy controls, NIM-CMPA infants had significantly lower Bacteroidetes and Bacteroides, and higher branched-chain fatty acids (isobutyric and isovaleric acids).
Why it matters
The choice of therapeutic formula appears to shape gut microbiota colonization patterns and may influence whether infants outgrow non-IgE cow's milk allergy, supporting hydrolyzed formula over vegetable-based alternatives for tolerance acquisition.