Cancer vaccines are a promising tool to control tumor progression.
When administrated alone, peptide based vaccines are poorly immunogenic.
We developed a vaccine adjuvant system to enhance antitumor immunity against HER2.
We optimized a system composed of Poly (I:C), DOTAP and HER2 derived P5 peptide.
DOTAP-CHOL-P5-Poly (I:C) induced strong antitumor responses in vitro and in vivo.