1. A culture platform to study quiescent hematopoietic stem cells following genome editing
- Author
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Kohei Shiroshita, Hiroshi Kobayashi, Shintaro Watanuki, Daiki Karigane, Yuriko Sorimachi, Shinya Fujita, Shinpei Tamaki, Miho Haraguchi, Naoki Itokawa, Kazumasa Aoyama, Shuhei Koide, Yosuke Masamoto, Kenta Kobayashi, Ayako Nakamura-Ishizu, Mineo Kurokawa, Atsushi Iwama, Shinichiro Okamoto, Keisuke Kataoka, and Keiyo Takubo
- Subjects
Genetics ,Radiology, Nuclear Medicine and imaging ,Biochemistry, Genetics and Molecular Biology (miscellaneous) ,Biochemistry ,Computer Science Applications ,Biotechnology - Abstract
Other than genetically engineered mice, few reliable platforms are available for the study of hematopoietic stem cell (HSC) quiescence. Here we present a platform to analyze HSC cell cycle quiescence by combining culture conditions that maintain quiescence with a CRISPR-Cas9 genome editing system optimized for HSCs. We demonstrate that preculture of HSCs enhances editing efficiency by facilitating nuclear transport of ribonucleoprotein complexes. For post-editing culture, mouse and human HSCs edited based on non-homologous end joining and cultured under low-cytokine, low-oxygen, and high-albumin conditions retain their phenotypes and quiescence better than those cultured under the proliferative conditions. Using this approach, HSCs regain quiescence even after editing by homology-directed repair. Our results show that low-cytokine culture conditions for gene-edited HSCs are a useful approach for investigating HSC quiescence
- Published
- 2022