alexa Detection of humoral response in patients with glioblastoma receiving EGFRvIII-KLH vaccines.


Journal of Vaccines & Vaccination

Author(s): Schmittling RJ, Archer GE, Mitchell DA, Heimberger A, Pegram C

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The epidermal growth factor receptor variant III (EGFRvIII) is a consistent tumor-specific mutation that is widely expressed in glioblastoma multiforme (GBM) and other neoplasms. As such it represents a truly tumor-specific target for antitumor immunotherapy. Although endogenous humoral responses to EGFRvIII have been reported in patients with EGFRvIII-expressing breast cancer, it is not known whether de novo responses can be generated or endogenous responses enhanced with an EGFRvIII-specific vaccine. To assess this in clinical trials, we have developed and validated an immunoassay to measure and isolate anti-EGFRvIII and anti-KLH antibodies from the serum of patients vaccinated with an EGFRvIII-specific peptide (PEPvIII) conjugated to keyhole limpet hemocyanin (KLH). Using magnetic beads with immobilized antigen we captured and detected anti-EGFRvIII and anti-KLH antibodies in serum from patients before and after vaccinations. Using this assay, we found that significant levels of antibody for tumor-specific antigen EGFRvIII (>4 microg/mL) and KLH could be induced after vaccination with PEPvIII-KLH.

This article was published in J Immunol Methods and referenced in Journal of Vaccines & Vaccination

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