Enhanced delivery of T cells to tumor after chemotherapy using membrane-anchored, apoptosis-targeted peptide

J Control Release. 2012 Sep 28;162(3):521-8. doi: 10.1016/j.jconrel.2012.07.023. Epub 2012 Jul 21.


Chemotherapy-induced apoptosis of tumor cells enhances the antigen presentation and sensitizes tumor cells to T cell-mediated cytotoxicity. Here we harnessed the apoptosis of tumor cells as a homing signal for the delivery of T cells to tumor. Jurkat T cells were anchored with ApoPep-1, an apoptosis-targeted peptide ligand, using the biocompatible anchor for membrane (BAM), an oleyl acid derivative. The ApoPep-1-BAM conjugate was efficiently anchored to cell membrane, while little anchoring was obtained with ApoPep-1 alone. The retention period of the ApoPep-1-BAM conjugate on cell membrane was approximately 80 and 40 min in the absence and presence of serum, respectively. ApoPep-1 was resistant to degradation in serum until 2h. The apoptosis-targeted T cells that were anchored with the ApoPep-1-BAM preferentially bound to apoptotic tumor cells over living cells. When intravenously injected into tumor-bearing mice, the number of apoptosis-targeted T cells and in vivo fluorescence signals by the homing of the cells to doxorubicin-treated tumor were higher than those of untargeted T cells. Accumulation of apoptosis-targeted T cells at other organs such as liver was not detected. These results suggest that the chemotherapy-induced apoptosis and subsequent enhancement of T cell delivery to tumor by the membrane anchoring of the apoptosis-targeted peptide could be a novel strategy for cancer immunotherapy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Apoptosis*
  • Biocompatible Materials / chemistry
  • Cell Line, Tumor
  • Cell Membrane / chemistry
  • Fluorescein-5-isothiocyanate / chemistry
  • Humans
  • Immunotherapy, Adoptive*
  • Mice
  • Neoplasms / pathology
  • Neoplasms / therapy*
  • Oligopeptides / chemistry*
  • Polyethylene Glycols / chemistry
  • T-Lymphocytes / immunology*
  • Xenograft Model Antitumor Assays


  • Biocompatible Materials
  • Oligopeptides
  • cysteinyl-glutaminyl-arginyl-prolyl-prolyl-arginine
  • Polyethylene Glycols
  • Fluorescein-5-isothiocyanate