Potentiation of a p53-SLP vaccine by cyclophosphamide in ovarian cancer, a single arm phase II study.

Abstract

The purpose of the current phase II single-arm clinical trial was to evaluate whether pre-treatment with low-dose cyclophosphamide improves immunogenicity of a p53-synthetic long peptide (SLP) vaccine in patients with recurrent ovarian cancer. Ovarian cancer patients with elevated serum levels of CA-125 after primary treatment were immunized four times with the p53-SLP vaccine.........The outcome of this phase II trial warrants new studies on the use of low-dose cyclophosphamide to potentiate the immunogenicity of the p53-SLP vaccine, or other anti-tumor vaccines.