Childhood asthma risk appears to be influenced by both the intestinal microbiome and 17q12-21 genotype Asthma ChildhoodAsthma Gut Microbiome microbiome 17q1221 Bacteroides breastfeeding jacionline UR_Med harvardmed koebenhavns_uni
Study: Environmental and genetic associations with aberrant early-life gut microbial maturation in childhood asthma. Image Credit: Troyan / Shutterstock
The researchers used longitudinal fecal 16s rRNA samples from these children, taken at 3-6 months, one year, or both. They also examined the presence of wildtype or mutational 17q12-21 genotypes in association with asthma risk and microbial maturation in the above cohort and the Copenhagen Prospective Studies on Childhood Asthma 2010 . These cohorts differ in that the biological mother in the former cohort had atopy or asthma.
Increased and decreased Bifidobacterium abundance at 3-6 months was linked to breastfeeding and higher microbial maturity. This supports the observation of this study that breastfed infants show delayed microbial maturation at this time point. Babies born by Cesarean section rather than vaginally were more likely to show delayed maturation of the microbiome at one year, though not at the earlier time point. These results seem to buttress the favorable role of breastfeeding and vaginal delivery in reducing the risk of asthma.
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