Changes in vitamin-D metabolites and parathyroid hormone in plasma following cholecalciferol administration to pre- and postmenopausal women in the...
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):637-46.Changes in vitamin-D metabolites and parathyroid hormone in plasma following cholecalciferol administration to pre- and postmenopausal women in the Netherlands in early spring and to postmenopausal women in Cura?ao.1, , , , , .1Central Laboratory for Clinical Chemistry, University Hospital Groningen, Netherlands.AbstractTo study the effect on plasma 25-hydroxycholecalciferol (25(OH)D), 1,25-dihydroxycholecalciferol (1,25(OH)2D) and parathyroid hormone (PTH) we supplemented premenopausal (aged 30 (SD 7) years) and postmenopausal (aged 61 (SD 2) years) white women living in The Netherlands in late winter/early spring, and elderly black and white women (aged 75 (SD 6) years) living in Cura?ao (Dutch Antilles) with either 10 or 20 micrograms cholecalciferol/d for 4, 5 and 9 weeks respectively. Baseline plasma 25(OH)D concentration of Dutch women was lower than that of Cura?ao women. Postmenopausal Dutch women had a higher PTH concentration in plasma than premenopausal Dutch and postmenopausal Cura?ao women. There were no differences in plasma 1,25(OH)2D. Cholecalciferol administration increased 25(OH)D in all groups, 1,25(OH)2D in postmenopausal Cura?ao women and PTH in postmenopausal Cura?ao women and premenopausal Dutch women. Serum and urinary Ca and phosphate concentrations did not change. There were no response differences between 10 and 20 microgram doses. Oral cholecalciferol administration (either 10 or 20 micrograms/d) to women living at northern latitudes in late winter/early spring increased 25(OH)D levels to the baseline levels of elderly people living in the tropics.PMID: 8672415
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点击加载更多&&Maternal antibodies against fetal blood group antigens A or B: lytic activity of IgG subclasses in monocyte-driven cytotoxicity and correlation wit...
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):465-9.Maternal antibodies against fetal blood group antigens A or B: lytic activity of IgG subclasses in monocyte-driven cytotoxicity and correlation with ABO haemolytic disease of the newborn.1, , , , , , , .1Central Laboratory of the Netherlands Red Cross Blood Transfusion Service, University of Amsterdam.AbstractIgG antibodies against blood group antigens A or B (anti-A/B) are able to sensitize erythrocytes for destruction in an antibody-dependent cell-mediated (ADCC) assay with monocytes as effector cells. The activity of maternal IgG anti-A/B in this test was compared with clinical signs of haemolytic disease of the newborn (HDN). When the ADCC was negative (less than 10% of the sensitized cells lysed), signs of increased red-cell destruction in the children were never observed. In three cases with a strongly positive ADCC (greater than 45% lysis), the children were severely affected and needed more than one exchange transfusion. In the cases with greater than 10% but less than 45% lysis in the ADCC, there was no clear correlation between the result of the ADCC and the degree of lysis in the newborn infants. In these cases, the degree of lysis of the red cells of the infant was shown to be strongly influenced by the number of A/B antigens per red cell. There was a direct correlation between the degree of lysis in the ADCC and the titre of IgG3 anti-A/B in the sera. There was comparable activity of maternal IgG anti-A/B in the ADCC test in the 32nd week of pregnancy and at the moment of delivery.PMID: 3219297
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