Abstract
Thiol reagents dithiothreitol (DTT) and 2-mercaptoethanol (2-ME) are sulfhydryl reagents that can be used to disperse cold autoagglutinins coating red blood cells (RBCs). DTT and 2-ME are primarily used when warm washing of the coated RBCs fails to successfully disperse the cold autoantibody. Using a weak concentration of DTT or 2-ME, the cold IgM agglutinin can be removed from the coated RBCs without disrupting the IgG or complement coating the RBCs. The treated RBCs can be used for ABO typing, antigen typing, or the direct antiglobulin test.
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