Oligosaccharides might stimulate calcium absorption in formula-fed preterm infants

Among other components of human milk, oligosaccharides might contribute to the high efficiency of calcium absorption of breastfed infants. In adults, it can be shown that dietary oligosaccharides can improve calcium absorption. The present analysis was performed to evaluate a possible influence of dietary oligosaccharides on parameters of calcium metabolism in preterm infants. The concentrations of calcium and phosphorus in plasma and in spot urine samples as well as the plasma activity of the alkaline phosphatase were measured in preterm infants fed either a standard formula (n = 15) or a formula supplemented with dietary oligosaccharides (n = 15) at the end of a 4-wk feeding period. Conclusions: There was no influence of the different diets on the plasma concentration of calcium and phosphorus or on the plasma activity of alkaline phosphatase. In urine, there was a tendency towards higher calcium concentrations in the group fed the supplemented formula compared concentrations in the group fed the standard formula. The concentrations of phosphate were not significantly different and, as a consequence, there was a tendency towards a higher Ca/P molar ratio in the group fed the supplemented formula. The data indicate that the calcium absorption might be influenced by the dietary oligosaccharides. Thus, the possible effect of dietary oligosaccharides on calcium homeostasis should be included in the discussion concerning the consequences of the use of dietary oligosaccharides in preterm infant nutrition

Characterization of T-cell population in children with prolonged fetal exposure to dexamethasone for anti-Ro/SS-A antibodies associated congenital heart block

The objectives of the study were to characterize the production, function and survival of T lymphocytes of children with prolonged fetal exposure to dexamethasone for anti-Ro/SS-A antibodies associated congenital complete heart block. The analysis of thymic function, studied by measuring the level of T-cell receptor excision circles, was performed by real time PCR, the composition of T-cell subpopulation was evaluated by flow cytometry and the T-cell diversity was assayed by heteroduplex analysis. T-cell competence was gauged at two functional levels by determining the proliferation and the number of T-cell divisions and by measuring gamma-interferon production after mitogenic stimulation. We observed that the thymic output, distribution of T-cell subsets, thymidine incorporation, number of T-cell divisions, and gamma-interferon production were comparable to those of age-matched control. On the contrary, heteroduplex analysis demonstrated the presence of both polyclonal and oligoclonal peripheral T-cell repertoires. In conclusion, the analysis of the T-cell compartment in children with prolonged intrauterine exposure to high dose dexamethasone did not disclose any relevant abnormality, except a restriction of T-cell receptor diversity in some patients

Characterization of T-cell population in children with prolonged fetal exposure to dexamethasone for anti-Ro/SS-A antibodies associated congenital heart block.

12nonenoneAIRO' P; SCARSI M; BRUCATO A; BENICCHI T; MALACARNE F; CAVAZZANA I; DANIELI E; LIDESTRI M; MOTTA M; CAIMI L; TINCANI A; IMBERTI LAiro', P; Scarsi, M; Brucato, A; Benicchi, T; Malacarne, F; Cavazzana, I; Danieli, E; Lidestri, M; Motta, M; Caimi, Luigi; Tincani, Angela; Imberti, L