Differential analysis of the bacterial community in colostrum samples from women with gestational diabetes mellitus and obesity

Gestational Diabetes Mellitus (GDM) and obesity affect the functioning of multiple maternal systems and influence colonization of the newborn gastrointestinal through the breastmilk microbiota (BMM). It is currently unclear how GDM and obesity affect the human BMM composition. Here, we applied 16S-rRNA high-throughput sequencing to human colostrum milk to characterize BMM taxonomic changes in a cohort of 43 individuals classified in six subgroups according to mothers patho-physiological conditions (healthy control (n = 18), GDM (n = 13), or obesity (n = 12)) and newborn gender. Using various diversity indicators, including Shannon/Faith phylogenetic index and UniFrac/robust Aitchison distances, we evidenced that BMM composition was influenced by the infant gender in the obesity subgroup. In addition, the GDM group presented higher microbial diversity compared to the control group. Staphylococcus, Corynebacterium 1, Anaerococcus and Prevotella were overrepresented in colostrum from women with either obesity or GDM, compared to control samples. Finally, Rhodobacteraceae was distinct for GDM and 5 families (Bdellovibrionaceae, Halomonadaceae, Shewanellaceae, Saccharimonadales and Vibrionaceae) were distinct for obesity subgroups with an absolute effect size greater than 1 and a q-value ≤ 0.05. This study represents the first effort to describe the impact of maternal GDM and obesity on BMM.

Modulation of CYP2E1 metabolic activity in a cohort of confirmed caffeine ingesting pregnant women with preterm offspring

Background

To ascertain interactions of caffeine ingestion, food, medications, and environmental exposures during preterm human gestation, under informed consent, we studied a cohort of Mexican women with further preterm offspring born at ≤ 34 completed weeks. At birth, blood samples were taken from mothers and umbilical cords to determine caffeine and metabolites concentrations and CYP1A2 (rs762551) and CYP2E1 (rs2031920, rs3813867) polymorphisms involved in caffeine metabolism.

Results

In 90 pregnant women who gave birth to 98 preterm neonates, self-informed caffeine ingestion rate was 97%, laboratory confirmed rate was 93 %. Theobromine was the predominant metabolite found. Consumption of acetaminophen correlated significantly with changes in caffeine metabolism (acetaminophen R² = 0.637, p = 0.01) due to activation of CYP2E1 alternate pathways. The main caffeine source was cola soft drinks.

Conclusion

Environmental exposures, especially acetaminophen ingestion during human preterm pregnancy, can modulate CYP2E1 metabolic activity.

[Variation in the blood lipids in premature newborns during the use of the "all-in-one" total nutritional mixture]

This prospective study was performed for the evaluation of the lipids in serum; the metabolic and other effects related with septicaemia, stability and compatibility of the parenteral nutrition combining in one continent amino acids, carbohydrates and fats; this system is called nutritional total mixture, "all in one" or three in one. Twenty prematures neonates were included in the study. The variables analyzed were: weight, gestational age; the laboratory exams taken before the installation of the system and seven days after were: total lipids, triglycerides, phospholipids, cholesterol, sodium, potassium, chloride, glucose, urea nitrogen, creatinine, hepatic enzymes and proteins, cellular blood count and coagulations tests. We obtained the next results: the mean gestational age and weight were 34 +/- 5 weeks and 1327 +/- 172 g, have been observed rise of lipids (P < 0.001), declination of potassium levels (P < 0.001), increment of calcium levels (P < 0.001), increment of albumin (P < 0.001) and platelets (P < 0.01). It is concluded that nutritional total mixture is a sure method in management of premature newborn with good stability, compatibility, with a increment of fats in serum physiological levels, with metabolic tolerance without repercussion renal, hepatic, hematological and without infections.