2. Academic Validation
  3. A selective cytotoxic adenovirus vector for concentration of pluripotent stem cells in human pluripotent stem cell-derived neural progenitor cells

A selective cytotoxic adenovirus vector for concentration of pluripotent stem cells in human pluripotent stem cell-derived neural progenitor cells

  • Sci Rep. 2021 Jun 1;11(1):11407. doi: 10.1038/s41598-021-90928-7.
Takamasa Hirai 1,  Ken Kono 1,  Rumi Sawada 1,  Takuya Kuroda 1,  Satoshi Yasuda 1 2,  Satoko Matsuyama 1 3,  Akifumi Matsuyama 3,  Naoya Koizumi 4,  Naoki Utoguchi 4,  Hiroyuki Mizuguchi 5,  Yoji Sato 6 7 8 9
Affiliations

Affiliations

  • 1 Division of Cell-Based Therapeutic Products, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki Ward, Kawasaki City, Kanagawa, 210-9501, Japan.
  • 2 Department of Quality Assurance Science for Pharmaceuticals, Graduate School of Pharmaceutical Sciences, Nagoya City University, Aichi, Japan.
  • 3 Center for Reverse TR, Osaka Habikino Medical Center, Osaka Prefectural Hospital Organization, Osaka, Japan.
  • 4 Department of Pharmaceutics and Biopharmaceutics, Showa Pharmaceutical University, Tokyo, Japan.
  • 5 Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan.
  • 6 Division of Cell-Based Therapeutic Products, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki Ward, Kawasaki City, Kanagawa, 210-9501, Japan. yoji@nihs.go.jp.
  • 7 LiSE Laboratory, Kanagawa Institute of Industrial Science and Technology, Kanagawa, Japan. yoji@nihs.go.jp.
  • 8 Department of Translational Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan. yoji@nihs.go.jp.
  • 9 Department of Cellular and Gene Therapy Products, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan. yoji@nihs.go.jp.
PMID: 34075124 DOI: 10.1038/s41598-021-90928-7
Abstract

Highly sensitive detection of residual undifferentiated pluripotent stem cells is essential for the quality and safety of cell-processed therapeutic products derived from human induced pluripotent stem cells (hiPSCs). We previously reported the generation of an adenovirus (Ad) vector and adeno-associated virus vectors that possess a suicide gene, inducible Caspase 9 (iCasp9), which makes it possible to sensitively detect undifferentiated hiPSCs in cultures of hiPSC-derived cardiomyocytes. In this study, we investigated whether these vectors also allow for detection of undifferentiated hiPSCs in preparations of hiPSC-derived neural progenitor cells (hiPSC-NPCs), which have been expected to treat neurological disorders. To detect undifferentiated hiPSCs, the expression of pluripotent stem cell markers was determined by immunostaining and flow cytometry. Using immortalized NPCs as a model, the Ad vector was identified to be the most efficient among the vectors tested in detecting undifferentiated hiPSCs. Moreover, we found that the Ad vector killed most hiPSC-NPCs in an iCasp9-dependent manner, enabling flow cytometry to detect undifferentiated hiPSCs intermingled at a lower concentration (0.002%) than reported previously (0.1%). These data indicate that the Ad vector selectively eliminates hiPSC-NPCs, thus allowing for sensitive detection of hiPSCs. This cytotoxic viral vector could contribute to ensuring the quality and safety of hiPSCs-NPCs for therapeutic use.

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