Abstract
A transient human anti-mouse antibody response was associated with significantly longer survival [Cheung et al. (1998): J Clin Oncol 16:3053] following antibody 3F8 (Ab1) treatment. We postulate that the induction of an idiotype network which included anti-anti-idiotypic (Ab3) and anti-G(D2) (Ab3') responses is associated with tumor control. Thirty-four patients with stage 4 neuroblastoma (NB) diagnosed at > 1 year of age were treated with anti-G(D2) monoclonal antibody 3F8 at the end of chemotherapy Long-term progression-free survival and overall survival correlated significantly with Ab3' andAb3, but not with non-idiotypic antibody responses. Only one of six individual specificities showed significant correlations with patient survival. As in vitro correlates of idiotype network initiated by Ab1 treatment, Ab3 and Ab3' may provide convenient biologic endpoints for monoclonal antibody therapy of advanced NB, and a rationale for choosing specific anti-idiotypic antibodies for vaccine development.
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