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| 2. |
- Sabharwal, Hemant, et al.
(författare)
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Oligosaccharides from faeces of a blood-group B, breast-fed infant
- 1988
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Ingår i: Carbohydrate Research. - : Elsevier BV. - 1873-426X .- 0008-6215. ; 178:1, s. 145-154
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Tidskriftsartikel (refereegranskat)abstract
- Eight oligosaccharides have been isolated from faeces of a blood group B, secretor, breast-fed infant and characterized by sugar and methylation analysis, f.a.b. mass spectrometry and 1H-n.m.r. spectroscopy. One of these oligosaccharides has not previously been reported and is a tri-L-fucosyl derivative of lacto-N-hexaose. The other compounds were identical to oligosaccharides found in human milk. Several of the reported compounds require the secretor dependent 2'-fucosyltransferase for their biosynthesis. Since the mother of this child was an O(H) non-secretor, an intestinal biosynthesis of at least some of these compounds is strongly indicated. No blood group B active oligosaccharides were detected which is in sharp contrast to the oligosaccharide excretion in faeces from a blood group A infant [Sabharwal et al., Mol. Immunol., 21 (1984) 1105-1112] in which all the major oligosaccharides isolated were blood group A active.
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| 3. |
- Sabharwal, Hemant, et al.
(författare)
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Oligosaccharides from feces of preterm infants fed on breast milk
- 1988
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Ingår i: Archives of Biochemistry and Biophysics. - : Elsevier BV. - 0003-9861. ; 265:2, s. 390-406
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Tidskriftsartikel (refereegranskat)abstract
- Nine neutral and five acidic oligosaccharides were isolated from feces of a preterm (30th postmenstrual week) blood group A nonsecretor infant fed on pooled breast milk. Structural analyses were carried out using sugar and methylation analyses, fast atom bombardment mass spectrometry, and 1H NMR. The acidic oligosaccharides are well-known components of human milk. The neutral oligosaccharides are characteristic of nonsecretor milk. Surprisingly, no secretor gene-dependent oligosaccharides were present in the feces. Another preterm (27th postmenstrual week) blood group A, secretor infant fed on pooled breast milk showed the same fecal oligosaccharide pattern as above during the first week after birth, despite being a secretor individual. Also notable was the absence of blood group A-active oligosaccharides in this sample. Another sample of feces collected 8 weeks later from the latter infant contained the expected blood group A-active oligosaccharides. Furthermore, free sialic acid was present at the cost of the sialyl oligosaccharides seen earlier. Thus, infants born prematurely do not show the same degree of development of oligosaccharide metabolism as their more mature counterparts.
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| 4. |
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| 5. |
- Arvidsson, J, et al.
(författare)
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The first case of the Sanfilippo type C syndrome in Scandinavia
- 1983
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Ingår i: Acta Paediatrica Scandinavica. - : Wiley. - 0001-656X .- 0803-5253 .- 1651-2227. ; 72:2, s. 313-316
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Tidskriftsartikel (refereegranskat)abstract
- A Swedish patient with typical symptoms of the Sanfilippo Syndrome (Mucopolysaccharidosis III) is described. The early onset of the disease, the presence of hepatomegaly, early dementia and the absence of umbilical bernia are consistent with the subgroup Sanfilippo A. Enzyme studies indicate the diagnosis Sanfilippo C, and thus the patient represents a more severe form of this subgroup than any of the four other patients hitherto described in detail.
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| 6. |
- Hammar, L, et al.
(författare)
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Lewis phenotype of erythrocytes and Leb-active glycolipid in serum of pregnant women
- 1981
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Ingår i: Vox Sanguinis. - 1423-0410. ; 40:1, s. 27-33
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Tidskriftsartikel (refereegranskat)abstract
- In an attempt to provide an explanation for the previously reported effect of pregnancy on the Lewis phenotype of erythrocytes, the level of Leb-active glycolipid in serum was compared with the reactions of erythrocytes, using samples obtained from 73 nonpregnant women, 74 women at the time of delivery, and 2 women at weekly intervals during their pregnancy. In this Swedish population, the frequency of the Le(a--b-) blood group increased from 11% in nonpregnant women to 36% in women at the time of delivery. Among Le(a--b+) women of all ABO groups, those who were A1 most often became (Leb-) during pregnancy. The change in phenotype occurred as early as the 24th week of gestation; the Leb antigen was again detectable within 6 weeks after delivery. The concentration of Leb glycolipid in serum, as measured by radioimmunoassay, decreased only slightly during pregnancy. The repartition of glycolipids, secondary to the increased ratio of lipoprotein to red cell mass that occurs during pregnancy, may account for the relative lack of Lewis glycolipid on erythrocytes.
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| 7. |
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| 8. |
- Messeter, L, et al.
(författare)
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Immunochemical characterization of a monoclonal anti-Leb blood grouping reagent
- 1984
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Ingår i: Vox Sanguinis. - 1423-0410. ; 46:2, s. 66-74
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Tidskriftsartikel (refereegranskat)abstract
- A haemagglutinating monoclonal anti-LebL antibody has been obtained from a mouse-mouse hybridoma after immunization with the Leb-active oligosaccharide lacto-N-difucohexaose I, coupled to edestin. Of 13 other antibodies obtained, one was able to agglutinate enzyme-treated erythrocytes of all ABO groups and three more were considered to be anti-LebH haemagglutinins. The remaining nine antibodies did not agglutinate red cells. The specificity of the stronger of the anti-LebL haemagglutinins was examined by studying its binding to a number of glycoconjugates and oligosaccharides.
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| 9. |
- Messeter, L, et al.
(författare)
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Mouse monoclonal antibodies with anti-A, anti-B and anti-A,B specificities; some superior to human polyclonal ABO reagents
- 1984
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Ingår i: Vox Sanguinis. - 1423-0410. ; 46:4, s. 185-194
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Tidskriftsartikel (refereegranskat)abstract
- A series of fusions using mouse myeloma cells and spleen cells from mice immunized with blood group substances or human red cells was performed with the aim of obtaining ABO antibodies suitable for routine blood grouping. Seven strongly agglutinating antibodies against antigens in the ABO system were obtained from 18 fusions. These antibodies were tested extensively in manual and automated routines, and six of them were found to be as good as or better than commercial polyclonal test sera of human origin.
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| 10. |
- Mårtensson, S, et al.
(författare)
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Lewis blood group antigens in urine sediments from patients with urinary bladder carcinoma
- 1987
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Ingår i: Scandinavian Journal of Urology and Nephrology. - 0036-5599. ; 21:3, s. 197-201
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Tidskriftsartikel (refereegranskat)abstract
- Urine sediments from 20 patients with urinary bladder carcinoma, and from 11 healthy individuals were investigated for their content of Lea and Leb active glycolipids. The investigation was restricted to blood group phenotype Le (a-b+). All individuals exhibited both Lea- and Leb-active glycolipids. In healthy individuals the ratio Lea/Leb was less than 1 in 10 out of 11 cases, whereas in patients with bladder cancer the ratio Lea/Leb was greater than 1 in 11 out of 20 cases. No correlation between the Lea/Leb ratio on the one hand and tumour grade or stage on the other hand could be shown. The results indicate one possible explanation for the loss of ABH antigens in bladder cancer and also demonstrate the potential of detailed biochemical investigations on exfoliated material in urine.
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