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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/4683

Title: Counterimmunoelectrophoresis with serum prediffusion: an improved method for the detection and identification of antibodies agains extractable nuclear and cytoplasmic antigens
Authors: Walravens, M.J.F.
Vanherrewegen, H.
Lacquet, F.
Godefridis, G.
Korevits, G.
Stevens, E.
Mariën, G.
Molenberghs, Geert
Issue Date: 1997
Publisher: Elsevier Science B.V.
Citation: Journal of immunological methods, 201(1). p. 89-98
Abstract: Abstract In the technique of counterimmunoelectrophoresis (CIE) with serum prediffusion (SPD) serum is allowed to diffuse freely into the gel before pouring the antigenic extract in its trough (or wells) and starting the electrophoresis. Both the immunoprecipitations and the interactions with reference sera are strongly intensified by SPD, leading to higher sensitivity and specificity for the detection of anti-SSA/Ro, anti-SSB/La, anti-U1RNP, anti-Sm, anti-Jo1 and even anti-Scl-70 antibodies. We found that the optimal SPD time was 2 h. To evaluate the relevance of SPD for the clinical laboratory, 92 antinuclear antibody (ANA) positive sera were tested on CIE without SPD and with 2 h SPD in identification tests with SSA/Ro, SSB/La, Sm, U1RNP and Jo1 reference sera (rsa). The precipitation lines and their interactions were evaluated by three independent observers. It was observed that SPD considerably improved the efficiency of CIE for antibody identification. The mechanisms underlying the intensification of the precipitation lines by SPD are discussed as are the characteristics of the CIE in comparison with other test systems such as the enzyme linked immunosorbent assay (ELISA) and immunoblot.
URI: http://hdl.handle.net/1942/4683
DOI: 10.1016/S0022-1759(96)00200-1
ISI #: A1997WH62000009
ISSN: 0022-1759
Type: Journal Contribution
Appears in Collections: Research publications

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