Abstract
Immunoblotting and ELISA methods are now employed for the detection of anti Ro/SSA and anti La/SSB antibodies sometimes more often than double immunodiffusion or counter-immunoelectrophoresis. We have developed an immunoblotting technique for the detection of anti Ro/SSA and anti-La/SSB antibodies. This assay named IB-Hela, which uses a Hela cell extract, was compared with the double immunodiffusion technique like two other commercial immunoassays (Elisa test from Sanofi-diagnostic Pasteur and Line immunoassay from Innogenetics). This evaluation shows a good agreement especially in the case of Ro/SSA antibodies detection. IB-Hela seems to be useful in the La/SSB detection with a better sensitivity than the double immunodiffusion technique. We conclude that the IB Hela is helpful for the search for anti-Ro/SSA and anti-La/SSB autoantibodies and that it can be used as an alternative method to the classical techniques of immunodiffusion and counter immunoelectrophoresis.
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