Detection of WT1 antibodies in patients with hematopoietic malignancies.

(A) Detection of IgM isotype of WT1 antibodies. Closed and open circles represent patients with IgM WT1 antibodies alone and with IgM+IgG WT1 antibodies, respectively. The longitudinal axis represents densitometric units of the IgM isotype of WT1 antibodies. (B) Detection of IgG isotype of WT1 antibodies. Closed and open circles represent patients with IgG WT1 antibodies alone and with IgG+IgM WT1 antibodies, respectively. The longitudinal axis represents densitometric units of the IgG isotype of WT1 antibodies.