Background: 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.
Procedure: 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
Results: 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.
Conclusions: 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.
Copyright 2000 Wiley-Liss, Inc.