Cell Reports (Mar 2018)

Generation of Tumor Antigen-Specific iPSC-Derived Thymic Emigrants Using a 3D Thymic Culture System

  • Raul Vizcardo,
  • Nicholas D. Klemen,
  • S.M. Rafiqul Islam,
  • Devikala Gurusamy,
  • Naritaka Tamaoki,
  • Daisuke Yamada,
  • Haruhiko Koseki,
  • Benjamin L. Kidder,
  • Zhiya Yu,
  • Li Jia,
  • Amanda N. Henning,
  • Meghan L. Good,
  • Marta Bosch-Marce,
  • Takuya Maeda,
  • Chengyu Liu,
  • Zied Abdullaev,
  • Svetlana Pack,
  • Douglas C. Palmer,
  • David F. Stroncek,
  • Fumito Ito,
  • Francis A. Flomerfelt,
  • Michael J. Kruhlak,
  • Nicholas P. Restifo

Journal volume & issue
Vol. 22, no. 12
pp. 3175 – 3190

Abstract

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Summary: Induced pluripotent stem cell (iPSC)-derived T cells may provide future therapies for cancer patients, but those generated by current methods, such as the OP9/DLL1 system, have shown abnormalities that pose major barriers for clinical translation. Our data indicate that these iPSC-derived CD8 single-positive T cells are more like CD4+CD8+ double-positive T cells than mature naive T cells because they display phenotypic markers of developmental arrest and an innate-like phenotype after stimulation. We developed a 3D thymic culture system to avoid these aberrant developmental fates, generating a homogeneous subset of CD8αβ+ antigen-specific T cells, designated iPSC-derived thymic emigrants (iTEs). iTEs exhibit phenotypic and functional similarities to naive T cells both in vitro and in vivo, including the capacity for expansion, memory formation, and tumor suppression. These data illustrate the limitations of current methods and provide a tool to develop the next generation of iPSC-based antigen-specific immunotherapies. : A barrier for clinical application of iPSC-derived CD8 T cells using OP9/DLL1 is their abnormal biology. Vizcardo et al. show that a 3D thymic culture system enables the generation of a homogeneous antigen-specific T cell subset, named iTEs, which closely mimics naive T cells and exhibits potent anti-tumor activity. Keywords: thymopoiesis, T cell differentiation, iPSC differentiation, adoptive cell transfer, naïve T cell, recent rhymic emigrants, fetal thymus organ culture, immunotherapy, 3D culture, tumor antigen specific T cell