| 1. |
- Nilsson Ekdahl, Kristina, et al.
(författare)
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Development of an immunoassay for the detection of minute amounts of IgG-coated erythrocytes in whole blood: Its application for the assessment of Fc-mediated clearance of anti-D-coated erythrocytes in vivo
- 1989
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Ingår i: Vox Sanguinis. - : Wiley. - 0042-9007 .- 1423-0410. ; 57:3, s. 188-192
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Tidskriftsartikel (refereegranskat)abstract
- A rapid and sensitive immunoassay for the detection of minute quantities of IgG-coated erythrocytes in whole blood was developed. Washed red blood cells were incubated in two steps with anti-human IgG antiserum followed by 125I-labelled protein A. The assay was able to detect amounts of sensitized erythrocytes as small as 0.5 ml of packed erythrocytes in a total blood volume of 5 liters and hematocrit 40%. A linear relation between increasing amounts of IgG-coated red cells in whole blood and the binding of 125I-labelled protein A was obtained. We applied the technique on the assessment of the removal of IgG anti-D-coated erythrocytes from the circulation of test individuals. T1/2 for the elimination of approximately 4 ml packed red cells sensitized with 62 μg of anti-D in 14 normal subjects was 20±5 min (mean±SEM). A splenectomized person did not clear the injected cells from the circulation during the test period of 70 min. If a standard curve was constructed the total blood volume in the test subjects could be calculated. This value correlated well (r = 0.99) with the blood volume calculated from the height and weight of the test individuals.
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| 2. |
- Gane, P, et al.
(författare)
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Heterogeneity of anti-A and anti-B monoclonal reagents. Agglutination of some weak ABH erythrocyte variants and recognition of synthetic oligosaccharide and tissue antigens.
- 1987
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Ingår i: Vox sanguinis. - 0042-9007. ; 53:2, s. 117-25
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Tidskriftsartikel (refereegranskat)abstract
- Eight anti-A and seven anti-B monoclonal reagents were tested in parallel, with normal and weak ABH red cell phenotypes. A whole range of different reactivity patterns was found, but by making a comparison with the results obtained using polyclonal standard reagents, two major categories of reagents were distinguished: (a) stronger and more specific reagents, and (b) reagents similar to, or weaker than, the standard polyclonal controls. The analysis of the specificity of the reagents by tissue fluorescence staining and reactivity with synthetic oligosaccharides and purified glycolipids confirmed the existence of broad and restricted specificities. Two kinds of anti-A1 reagents are described. One related to type 3/4 structures, which stains the Golgi apparatus, and another with broad anti-A specificity which cross-reacts with 'A-like' structures. The inhibition of anti-A reagents with salivas and synthetic oligosaccharide antigens gave parallel results for the secretor salivas and the difucosylated A antigens.
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| 3. |
- Widell, Anders, et al.
(författare)
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Relation between donor transaminase and recipient hepatitis non-A, non-B in Sweden
- 1988
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Ingår i: Vox Sanguinis. - 1423-0410. ; 54:3, s. 154-159
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Tidskriftsartikel (refereegranskat)abstract
- The relation between donor alanine aminotransferase (ALT) and recipient post-transfusion hepatitis (PTH) non-A, non-B was studied in patients tested before and 6 and 12 weeks after transfusion. The minimum ALT criterion for PTH was 105 IU/l (greater than 2.5 times the upper normal of 42 IU/l). In 8.8% of donors, ALT was greater than 42 IU/l, and in 2.3% ALT was greater than 63 IU/l, i.e., 1.5 times elevated. PTH non-A, non-B occurred in 14 of 742 recipients. The PTH incidence increased when donor ALT was above 63 IU/l (1.5 vs. 5.6%; p less than 0.05). However, if the confounding factor of volume variations was compensated for, elevated donor ALT and PTH were only statistically linked among recipients less than 70 years (p less than 0.02; Mantel-Haenszel test).
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