Differences in gut microbiome diversity attributed to dietary patterns in children with obesity


In a current examine revealed in Microbiology Spectrum, researchers discovered that variations within the dietary patterns of kids with regular weight and those that have been obese or overweight contributed to variations within the intestine microbiome variety, virulence elements of intestine micro organism, and metabolic operate.

Examine: Virulence factors of the gut microbiome are associated with BMI and metabolic blood parameters in children with obesity. Picture Credit score: Africa Studio / Shutterstock.com


A rising physique of proof signifies that intestine microbiota has a big position in numerous elements of host metabolism, together with digestion, harvesting of power, and induction of low-grade irritation. As well as, the genetic elements of the host, in addition to different traits reminiscent of age, weight loss program, immunity, and gender, affect the intestine microbiome composition.

Analysis reveals that bacterial variety within the intestine and the person’s useful capability fluctuate between these with regular weight and overweight people. Intestine microbiome profile variations have additionally been linked to metabolic issues, lipid accumulation, and irritation.

Lipogenesis within the liver and the regulation of urge for food by means of hormones are additionally related to intestine microbiome genes.

Other than its position in adipogenesis, superoxide discount, and the metabolism of nutritional vitamins, intestine microbiota additionally regulates innate immunity and the systemic, low-grade inflammatory state that may contribute to fats deposition and weight problems. Due to this fact, Dysbiosis, which is the imbalance of intestine microbiota, mixed with weight loss program, doubtless has a big position within the improvement of weight problems.

In regards to the examine

Within the current examine, researchers carried out a cross-sectional evaluation of knowledge from 45 kids between the ages of six and 12 to find out the affiliation between intestine microbiota and weight problems.

Questionnaires have been used to acquire info on dietary frequencies, gender, age, and physique mass index (BMI). Based mostly on the World Well being Group (WHO) z-scores, during which BMI is adjusted for gender and age, the kids have been categorised into two classes of obese and overweight (OWOB) and regular weight (NW).

Information from meals frequency questionnaires have been used to categorise the dietary habits of kids into two dietary patterns. To this finish, Sample 1 was characterised by complicated carbohydrates and proteins, whereas Sample 2 comprised easy carbohydrates and saturated fat.

Shotgun metagenomics was used to evaluate the taxonomic variety of the intestine microbiota and metabolic capability from genomic deoxyribonucleic acid (DNA) extracted from fecal samples. Clade-specific markers have been used for the taxonomic and useful evaluation of the intestine micro organism. Moreover, reverse Simpson and Shannon variety indices have been calculated.

The virulence issue database was used to display for virulence issue genes, whereas multivariate linear modeling was used to find out the affiliation between the taxa, virulence elements, and performance of intestine microbes and covariates of weight loss program, serology, and anthropometric measurements.

Examine findings

Important variations between the alpha and beta variety of the intestine microbiota have been noticed between the kids within the NW and OWOB teams, thus suggesting that particular phyla of micro organism contribute to greater ranges of power harvest.

Moreover, species reminiscent of Ruminococcus species, Victivallis vadensis, Mitsuokella multacida, Alistipes species, Clostridium species, and Acinetobacter johnsonii have been linked to more healthy metabolic parameters.

In distinction, a rise within the abundance of micro organism reminiscent of Veillonellaceae, Lactococcus, Fusicatenibacter saccharivorans, Fusicatenibacter prausnitzii, Eubacterium, Roseburia, Dialister, Coprococcus catus, Bifidobacterium, and Bilophila was recognized in kids with pro-inflammatory circumstances and weight problems.

Micro organism reminiscent of Citrobacter europaeus, Citrobacter youngae, Klebsiella variicola, Enterococcus mundtii, Gemella morbillorum, and Citrobacter portucalensis have been related to greater lipid and sugar consumption, in addition to greater blood biochemistry values and anthropometric measurements.

Diets excessive in fat and easy carbohydrates have been related to the abundance of Citrobacter and Klebsiella species within the intestine. Furthermore, earlier research have indicated that these bacterial species are potential markers of irritation, weight problems, and a rise in fasting glucose.

The metabolism of menaquinones and gamma-glutamyl was negatively related to BMI. Moreover, the microbiomes of kids within the NW group preserved a extra constant alpha variety of virulence elements, whereas OWOB microbiomes exhibited a dominance of virulence elements.

Variations within the metabolic capacities pertaining to biosynthesis pathways of nutritional vitamins, carriers, amino acids, nucleotides, nucleosides, amines, and polyamines, in addition to the degradation of nucleotides, nucleosides, and carbohydrate-sugars, have been additionally discovered between the NW and OWOB teams.


Dietary profiles and the variety of intestine microbiota have been discovered to be interconnected and related to adjustments in metabolic parameters, the dominance of virulence elements, and weight problems. Adjustments in intestine microbiome variety and relative abundance have been linked to weight problems, inflammatory responses, and metabolic issues.

Taken collectively, the examine findings recommended that the prevalence of virulence elements, in addition to the metabolic and genetic roles of intestine microbiota in rising irritation, might help establish people at an elevated threat of childhood weight problems.

Journal reference:

  • Murga-Garrido, S. M., Ulloa-Pérez, E. J., Díaz-Benítez, C. E., et al. (2023). Virulence elements of the intestine microbiome are related to BMI and metabolic blood parameters in kids with weight problems. Microbiology Spectrum. doi:10.1128/spectrum.03382-22
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