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Sökning: swepub > Umeå universitet > (2000-2004) > Hernell Olle

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  • Ivarsson, Anneli, et al. (författare)
  • Is prevention of coeliac disease possible?
  • 2000
  • Ingår i: Acta Paediatr. - 0803-5253 .- 1651-2227. ; 89:6, s. 749-50
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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  • Andersson, Yvonne, et al. (författare)
  • Lactoferrin is responsible for the fungistatic effect of human milk.
  • 2000
  • Ingår i: Early Human Development. - 0378-3782 .- 1872-6232. ; 59:2, s. 95-105
  • Tidskriftsartikel (refereegranskat)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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9.
  • Dewey, Kathryn G, et al. (författare)
  • Iron supplementation affects growth and morbidity of breast-fed infants : results of a randomized trial in Sweden and Honduras.
  • 2002
  • Ingår i: Journal of Nutrition. - : The American Society for Nutritional Sciences. - 0022-3166 .- 1541-6100. ; 132:11, s. 3249-3255
  • Tidskriftsartikel (refereegranskat)abstract
    • Iron supplements are often prescribed during infancy but their benefits and risks have not been well documented. We examined whether iron supplements affect growth or morbidity of breast-fed infants. Full-term infants in Sweden (n = 101) and Honduras (n = 131) were randomly assigned to three groups at 4 mo of age: 1) placebo from 4 to 9 mo; 2) placebo from 4 to 6 mo and iron supplements [1 mg/(kg. d)] from 6 to 9 mo; or 3) iron supplements from 4 to 9 mo. All infants were exclusively or nearly exclusively breast-fed to 6 mo and continued to be breast-fed to at least 9 mo. Growth was measured monthly and morbidity data were collected every 2 wk. Among the Swedish infants, gains in length and head circumference were significantly lower in those who received iron than in those given placebo from 4 to 9 mo. The same effect on length was seen in Honduras, but only at 4-6 mo among those with initial hemoglobin (Hb) > or =110 g/L. There was no significant main effect of iron supplementation on morbidity, nor any significant interaction between iron supplementation and site, but for diarrhea (with both sites combined), there was an interaction between iron supplementation and initial Hb. Among infants with Hb < 110 g/L at 4 mo, diarrhea was less common among those given iron than in those given placebo from 4-9 mo, whereas the opposite was true among those with Hb > or = 110 g/L (P < 0.05). We conclude that routine iron supplementation of breast-fed infants may benefit those with low Hb but may present risks for those with normal Hb.
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10.
  • Domellöf, Magnus, 1963-, et al. (författare)
  • Iron absorption in breast-fed infants : effects of age, iron status, iron supplements, and complementary foods.
  • 2002
  • Ingår i: American Journal of Clinical Nutrition. - : American Society for Clinical Nutrition. - 0002-9165 .- 1938-3207. ; 76:1, s. 198-204
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Iron supplements are often recommended for older breast-fed infants, but little is known about factors affecting iron absorption from human milk or supplements. OBJECTIVE: We investigated the effects of age, iron status, and iron intake on iron absorption in healthy, term, breast-fed infants. DESIGN: Twenty-five infants were randomly assigned to receive either 1) iron supplements (1 mg x kg(-1) x d(-1)) from 4 to 9 mo of age, 2) placebo from 4 to 6 mo and iron supplements from 6 to 9 mo, or 3) placebo from 4 to 9 mo. Infants were exclusively breast-fed to 6 mo and partially breast-fed to 9 mo of age. Iron absorption was assessed by giving (58)Fe with mother's milk at 6 and 9 mo. Blood samples were obtained at 4, 6, and 9 mo, and complementary food intake was recorded at 9 mo. RESULTS: At 6 mo, mean (+/-SD) fractional iron absorption from human milk was relatively low (16.4 +/- 11.4%), with no significant difference between iron-supplemented and unsupplemented infants. At 9 mo, iron absorption from human milk remained low in iron-supplemented infants (16.9 +/- 9.3%) but was higher (P = 0.01) in unsupplemented infants (36.7 +/- 18.9%). Unexpectedly, iron absorption at 9 mo was not correlated with iron status but was significantly correlated with intake of dietary iron, including supplemental iron. CONCLUSIONS: Changes in the regulation of iron absorption between 6 and 9 mo enhance the infant's ability to adapt to a low-iron diet and provide a mechanism by which some, but not all, infants avoid iron deficiency despite low iron intakes in late infancy.
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