In vivo targeting of adoptively transferred T-cells with antibody- and cytokine-conjugated liposomes
Name
Zheng-2013-In vivo targeting of.pdf
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Author(s)
Zheng, Yiran
Stephan, Matthias T.
Gai, S. Annie
Abraham, Wuhbet
Shearer, Adrianne
Zheng, Yiran
Irvine, Darrell J
Date Issued
June 2013
Journal
Journal of Controlled Release
Publisher
Elsevier
Citation
Zheng, Yiran, Matthias T. Stephan, S. Annie Gai, Wuhbet Abraham, Adrianne Shearer, and Darrell J. Irvine. “In Vivo Targeting of Adoptively Transferred T-Cells with Antibody- and Cytokine-Conjugated Liposomes.” Journal of Controlled Release 172, no. 2 (December 2013): 426–435.
Version
Final published version
Abstract
In adoptive cell therapy (ACT), autologous tumor-specific T-cells isolated from cancer patients are activated and expanded ex vivo, then infused back into the individual to eliminate metastatic tumors. A major limitation of this promising approach is the rapid loss of ACT T-cell effector function in vivo due to the highly immunosuppressive environment in tumors. Protection of T-cells from immunosuppressive signals can be achieved by systemic administration of supporting adjuvant drugs such as interleukins, chemotherapy, and other immunomodulators, but these adjuvant treatments are often accompanied by serious toxicities and may still fail to optimally stimulate lymphocytes in all tumor and lymphoid compartments. Here we propose a novel strategy to repeatedly stimulate or track ACT T-cells, using cytokines or ACT-cell-specific antibodies as ligands to target PEGylated liposomes to transferred T-cells in vivo. Using F(ab′)[subscript 2] fragments against a unique cell surface antigen on ACT cells (Thy1.1) or an engineered interleukin-2 (IL-2) molecule on an Fc framework as targeting ligands, we demonstrate that > 95% of ACT cells can be conjugated with liposomes following a single injection in vivo. Further, we show that IL-2-conjugated liposomes both target ACT cells and are capable of inducing repeated waves of ACT T-cell proliferation in tumor-bearing mice. These results demonstrate the feasibility of repeated functional targeting of T-cells in vivo, which will enable delivery of imaging contrast agents, immunomodulators, or chemotherapy agents in adoptive cell therapy regimens.
MIT Department
Massachusetts Institute of Technology. Department of Biological Engineering
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Ragon Institute of MGH, MIT and Harvard
Koch Institute for Integrative Cancer Research at MIT
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DOI of Published Version
https://doi.org/10.1016/j.jconrel.2013.05.037
