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  • Aggett, Peter J, et al. (creator_code:aut_t)
  • Feeding preterm infants after hospital discharge : a commentary by the ESPGHAN Committee on Nutrition.
  • 2006
  • record:In_t: Journal of pediatric gastroenterology and nutrition. - : Ovid Technologies (Wolters Kluwer Health). - 1536-4801 .- 0277-2116. ; 42:5, s. 596-603
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Survival of small premature infants has markedly improved during the last few decades. These infants are discharged from hospital care with body weight below the usual birth weight of healthy term infants. Early nutrition support of preterm infants influences long-term health outcomes. Therefore, the ESPGHAN Committee on Nutrition has reviewed available evidence on feeding preterm infants after hospital discharge. Close monitoring of growth during hospital stay and after discharge is recommended to enable the provision of adequate nutrition support. Measurements of length and head circumference, in addition to weight, must be used to identify those preterm infants with poor growth that may need additional nutrition support. Infants with an appropriate weight for postconceptional age at discharge should be breast-fed when possible. When formula-fed, such infants should be fed regular infant formula with provision of long-chain polyunsaturated fatty acids. Infants discharged with a subnormal weight for postconceptional age are at increased risk of long-term growth failure, and the human milk they consume should be supplemented, for example, with a human milk fortifier to provide an adequate nutrient supply. If formula-fed, such infants should receive special postdischarge formula with high contents of protein, minerals and trace elements as well as an long-chain polyunsaturated fatty acid supply, at least until a postconceptional age of 40 weeks, but possibly until about 52 weeks postconceptional age. Continued growth monitoring is required to adapt feeding choices to the needs of individual infants and to avoid underfeeding or overfeeding
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  • Andersson, Eva-Lotta, et al. (creator_code:aut_t)
  • Bile salt-stimulated lipase and pancreatic lipase-related protein 2 : key enzymes for lipid digestion in the newborn examined using the Caco-2 cell line
  • 2011
  • record:In_t: Journal of Lipid Research. - : American Society for Biochemistry and Molecular Biology. - 0022-2275 .- 1539-7262. ; 52:11, s. 1949-1956
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • In rodents, bile salt-stimulated lipase (BSSL) and pancreatic lipase-related protein 2 (PLRP2) are the dominant lipases expressed in the exocrine pancreas in early life, when milk is the main food. The aim of the present study was to evaluate if BSSL and PLRP2 are also key enzymes in neonatal intestinal fat digestion. Using Caco-2 cells as a model for the small intestinal epithelium, purified human enzymes were incubated in the apical chamber with substrates and bile salt concentrations resembling the milieu of the small intestine of newborn infants. BSSL and PLRP2 hydrolyzed triglycerides (TG) to free fatty acids (FA) and glycerol. The cells took up the FA, which were reesterfied to TG. Together, BSSL and PLRP2 have a synergistic effect, increasing cellular uptake 4-fold compared to the sum of each lipase alone. A synergistic effect was also observed with retinyl ester as a substrate. PLRP2 hydrolyzed cholesteryl ester but not as efficiently as BSSL, and the two had an additive rather than synergistic effect. We conclude the key enzymes in intestinal fat digestion are different in newborns than later in life. Further studies are needed to fully understand this difference and its implication for designing optimal neonatal nutrition.
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  • Andersson, Yvonne, et al. (creator_code:aut_t)
  • Formula feeding skews immune cell composition toward adaptive immunity compared to breastfeeding
  • 2009
  • record:In_t: Journal of Immunology. - : The American Association of Immunologists, Inc.. - 0022-1767 .- 1550-6606. ; 183:7, s. 4322-4328
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • The ontogeny of the immune system and the effect thereon by type of infant feeding is incompletely understood. We analyzed frequencies and composition of immune cells in blood of breastfed (BF) and formula-fed (FF) infants at 1.5, 4, and 6 mo of age. Three formulas with the same protein concentration but with varying levels of alpha-lactalbumin and caseinoglycomacropeptide were compared. Twenty-nine exclusively BF infants served as reference, and 17 infants in each formula group completed the study. Whole blood and PBMCs were analyzed by flow cytometry and immunoflow cytometry, respectively. Leukocyte count of BF infants increased with time due to increased frequency of neutrophils. Lymphocyte count was high at 1.5 mo and was unchanged over time, as were the relative proportions of CD4+ alphabetaT cells, CD8+ alphabetaT cells, B cells, NK cells, and gammadeltaT cells. Most CD45R0+CD3+ cells were HLA-DR- and hence memory cells. Compared with breastfeeding, formula feeding resulted in a significant decrease in proportion of NK cells, but a significant increase in naive CD4+ alphabetaT cells and an elevated CD4-to-CD8 ratio, that is, 3.3 in the combined FF groups compared with 2.6 in the BF group. No significant differences were found between the three groups of FF infants. In conclusion, blood cells of lymphoid lineage did not change significantly in frequencies or composition from 1.5 to 6 mo of age in BF infants. In contrast, FF infants displayed an ongoing maturation of adaptive immunity cells and a delayed recruitment of innate immunity cells as compared with BF infants.
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  • Andersson, Yvonne, et al. (creator_code:aut_t)
  • Lactoferrin is responsible for the fungistatic effect of human milk.
  • 2000
  • record:In_t: Early Human Development. - 0378-3782 .- 1872-6232. ; 59:2, s. 95-105
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • Human milk has recognized anti-microbial effects and it has been repeatedly shown that breast-fed infants have fewer and less severe infections than formula-fed infants. While most studies have focused on anti-bacterial and anti-viral activities few have focused on the anti-fungal effect of human milk. Dermal and other infections caused by fungi are common in very low birth weight (VLBW) infants. Using a liquid culturing method and Candida albicans and Rhodotorula rubra as representative fungi, we studied the anti-fungal effect of human milk and certain human milk proteins. In vitro, human milk showed potent inhibitory effect on fungal growth. Most, if not all of this effect was caused by lactoferrin via its iron-binding capacity; increasing the iron content of the incubation medium abolished the inhibitory effect. In contrast, other human milk proteins with known or suggested anti-microbial effects rather increased fungal growth. Viability test and electron microscopy revealed that the growth inhibitory effect of human milk, i.e. mediated by lactoferrin, is fungistatic rather than fungicidal.
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  • Andersson, Yvonne, et al. (creator_code:aut_t)
  • Three variants of parathyroid hormone-related protein messenger RNA are expressed in human mammary gland.
  • 1997
  • record:In_t: Pediatric Research. - 0031-3998 .- 1530-0447. ; 41:3, s. 380-3
  • swepub:Mat_article_t (swepub:level_refereed_t)abstract
    • PTH-related protein (PTHrP) is found in a variety of tissues; particularly high levels are present in human milk. The structure of the human PTHrP gene is complex, and alternative splicing allows expression of three different variants PTHrP139, PTHrP173, and PTHrP141, respectively. To determine which of the variants are expressed in human mammary gland a reverse transcriptase polymerase chain reaction (RT-PCR) method was elaborated, distinguishing the three variants. mRNA isolated from human milk cells, human mammary epithelial cells (HMEC) and human nonlactating mammary gland cells were analyzed. The RT-PCR experiments resulted in amplification of DNA fragments corresponding to all three variants for all three cell sources tested. The nucleotide sequences of the PCR fragments were determined and verified to be identical to the reported sequences. Hence, it is concluded that human mammary gland epithelial cells express three variants of PTHrP. Whether these have different physiologic effects in the mammary gland or in the breast fed infant remain to be explored.
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